With Strings Attached: Grandparent-provided child care, fertility, and female labour market outcomes

Grandparents are regular providers of free child care. Similar to any other form of child care, availability of grandparent-provided child care affects fertility and labor market decisions of women positively. We find that women in Germany, residing close to parents or in-laws are more likely to have children and that as mothers they are more likely to hold a regular part- or fulltime job. However, different from any other type of child care, for individuals to enjoy grandparent-provided child care on a regular basis, residence choices must coincide with those of parents or in-laws. Thus while living close provides access to free child care, it imposes costly spatial restrictions. We find that hourly wages of mothers residing close to parents or in-laws are lower compared to those residing further away, and having relatives taking care of ones' children increases the probability of having to commute. We build a general equilibrium model of residence choice, fertility decisions, and female labor force participation that can account for the relationships between grandparent-provided child care, fertility and female labor market outcomes. We simulate our model to analyze how women's decisions on residence, fertility, and labor force participation change under distinct scenarios regarding availability of grandparent-provided child care and different family policies

With strings attached: grandparent-provided child care, fertility, and female labor market outcomes

Grandparents are regular providers of free child care. Similar to any other form of child care, availability of grandparent-provided child care affects fertility and labor market decisions of women positively. We find that women in Germany, residing close to parents or in-laws are more likely to have children and that as mothers they are more likely to hold a regular part-or fulltime job. However, different from any other type of child care, for individuals to enjoy grandparent-provided child care on a regular basis, residence choices must coincide with those of parents or in-laws. Thus while living close provides access to free child care, it imposes costly spatial restrictions. We find that hourly wages of mothers residing close to parents or in-laws are lower compared to those residing further away, and having relatives taking care of ones' children increases the probability of having to commute. We build a general equilibrium model of residence choice, fertility decisions, and female labor force participation that can account for the relationships between grandparent-provided child care, fertility and female labor market outcomes. We simulate our model to analyze how women's decisions on residence, fertility, and labor force participation change under distinct scenarios regarding availability of grandparent provided childcare and different family policies

How Do US College Students\u27 Sense of Life Purpose Relate to Their Emotional Expectations Toward Community Work in Service-Learning Courses?

INTRODUCTION: Few studies consider how purpose in life predicts emotions related to community service in college courses even though a purpose in life, a “compass” for finding opportunities to make meaningful prosocial contributions, should motivate students to serve. METHOD: Multilevel structural equation modeling estimated direct and indirect effects of survey responses regarding students’ past service experience, sense of purpose, and searching for purpose on their emotional expectations for service-learning before starting. RESULTS: Controlling for age, gender, extrinsic motivation, and characteristics of universities and courses, students’ past service experience and two purpose variables positively related to expected positive emotions toward service work, mediated through both students’ helping identity and intrinsic motivation to serve. Only sense of purpose was associated with higher intrinsic motivation, which was associated with lower expected negative emotions. DISCUSSION: Considering students’ life purpose may stimulate intrinsic motivation and schemas of being a helping person, which could contribute to positive emotions toward community service even before the service work begins

Sexuality and Quality of Life in Postmodernism in University of Mexico

This study analyzes the responses of a group of young University students from the state of Coahuila, México, in relation to variables on Quality of Life. Their responses are analyzed in two groups: sexually active young people, and those who do not. It seeks to find a different lifestyle in relation to Sexuality. They are young people aged between 17 and 25 years old. Although Sexuality is not mentioned as a part of quality life, it is certainly part of the physical, psychological and emotional health of people. Sexuality in Mexico is stigmatized, and deeply rooted in morality; that is why unplanned pregnancies are increasing and at an earlier age. Several authors refer changes in lifestyles between modernity and Postmodernity (Lechner, Lyotard, Lipovetsky, Lanceros, etc.) have been little explored in relation to the Quality of Life and the indicators that measure it. The results allow to affirm that studied youth perceive themselves in two different models of lifestyle: the sexual active with a tendency to postmodern styles, while the non-active, to modern lifestyles

Freeze-thaw durability of recycled concrete from construction and demolition wastes

Road engineering is one of the most accepted applications for concrete including recycled aggregates from construction and demolition wastes as a partial replacement of the natural coarse aggregates. Amongst the durability concerns of such application, the deterioration due to freeze-thaw cycles is one of the most important causes decreasing the life span of concrete in countries with a continental climate. Moreover, the use of de-icing salts, which is a common practice to prevent ice formation on roadways and walkways, increases the superficial degradation of concrete due to frost-salt scaling. Thus, this paper aims to assess the resistance to frost salt with de-icing salts of two recycled concrete mixtures containing a 50% replacement of the conventional gravel by recycled aggregates both of mixed and ceramic nature, i.e. containing ceramic percentages of 34% and 100%, in comparison to a conventional concrete made with siliceous gravel. Therefore, the surface scaling was evaluated based on EN 1339 (2004) on 28 days cured cylinders, exposed to 7, 14, 21 and 28 freeze-thaw cycles in the presence of sodium chloride solution. Given that no airentraining admixture was used in any of the mixtures, the scaling of both conventional and recycled concretes exceeded the 1 kg/m2 limit established by the European standard. Nonetheless, for the casting surface, the recycled concrete with low ceramic content exhibited a similar behaviour to the conventional concrete, whereas the performance of the recycled concrete with high ceramic content was better. However, as expected, trowelled surfaces showed a worse performance and both recycled concretes had a lower freeze-thaw durability than the conventional mixture. In any case, the results suggested that the composition of the recycled aggregates could be used as a factor to limit the differences in performance between recycled and conventional mixtures

Controllable direction of liquid jets generated by thermocavitation within a droplet.

A high-velocity fluid stream ejected from an orifice or nozzle is a common mechanism to produce liquid jets in inkjet printers or to produce sprays among other applications. In the present research, we show the generation of liquid jets of controllable direction produced within a sessile water droplet by thermocavitation. The jets are driven by an acoustic shock wave emitted by the collapse of a hemispherical vapor bubble at the liquid-solid/substrate interface. The generated shock wave is reflected at the liquid-air interface due to acoustic impedance mismatch generating multiple reflections inside the droplet. During each reflection, a force is exerted on the interface driving the jets. Depending on the position of the generation of the bubble within the droplet, the mechanical energy of the shock wave is focused on different regions at the liquid-air interface, ejecting cylindrical liquid jets at different angles. The ejected jet angle dependence is explained by a simple ray tracing model of the propagation of the acoustic shock wave inside the droplet

Microfluidic Screening of Electric Fields for Electroporation

Electroporation is commonly used to deliver molecules such as drugs, proteins, and/or DNA into cells, but the mechanism remains poorly understood. In this work a rapid microfluidic assay was developed to determine the critical electric field threshold required for inducing bacterial electroporation. The microfluidic device was designed to have a bilaterally converging channel to amplify the electric field to magnitudes sufficient to induce electroporation. The bacterial cells are introduced into the channel in the presence of SYTOX[superscript ®], which fluorescently labels cells with compromised membranes. Upon delivery of an electric pulse, the cells fluoresce due to transmembrane influx of SYTOX[superscript ®] after disruption of the cell membranes. We calculate the critical electric field by capturing the location within the channel of the increase in fluorescence intensity after electroporation. Bacterial strains with industrial and therapeutic relevance such as Escherichia coli BL21 (3.65 ± 0.09 kV/cm), Corynebacterium glutamicum (5.20 ± 0.20 kV/cm), and Mycobacterium smegmatis (5.56 ± 0.08 kV/cm) have been successfully characterized. Determining the critical electric field for electroporation facilitates the development of electroporation protocols that minimize Joule heating and maximize cell viability. This assay will ultimately enable the genetic transformation of bacteria and archaea considered intractable and difficult-to-transfect, while facilitating fundamental genetic studies on numerous diverse microbes.United States. Defense Advanced Research Projects Agency (Grant D13AP00025

Disfuncionalidad familiar y comunicación en adolescentes de Instituciones Educativas públicas del Callao – 2019

Esta investigación tuvo por objetivo determinar la relación entre disfuncionalidad familiar y comunicación en adolescentes de Instituciones Educativas públicas del Callao. El tipo de investigación fue correlacional transversal, el tipo de muestreo fue no probabilístico por conveniencia, obteniendo como muestra 224 estudiantes entre 16 y 18 años de ambos sexos. Se utilizó la encuesta como técnica y los instrumentos de recolección de datos fueron cuestionarios. Se utilizó la Escala de Comunicación Padres – Adolescentes (PAC) de Barnes y Olson, adaptada en el 2018 por Araujo, Ucedo y Bueno y la Escala de APGAR Familiar de Smilkstein, adaptada por Castilla, Caycho, Shimabukuro y Valdivia en el 2014. Para determinar la confiabilidad de los instrumentos se utilizó el Coeficiente Alfa de Cronbach cuyo resultado fue .763 para la escala de comunicación y de .850 para el APGAR Familiar, confirmando la confiabilidad de las escalas utilizadas. Para determinar la validez del APGAR Familiar realizó la validación por juicio de expertos, se utilizó la V de Aiken obteniendo un resultado general de 0.74, significó que los jueces llegaron al acuerdo de que los ítems miden adecuadamente el constructo. Se obtuvo como resultado correlación positiva entre las variables disfuncionalidad familiar y comunicación, evidenciando influencia no significativa estadísticamente siendo p=,278 (p>0.05). Sin embargo, en las dimensiones apertura de la comunicación y problemas de comunicación se obtuvo que la correlación fue estadísticamente significativa, cuyo grado de correlación fue positivo medio