Urban vegetation cover correlates with environmental variables in a desert city: insights of mitigation measures to climate change

Urban Ecosystems - Green cover and air quality are important components of life quality and human ecology in arid lands. In the Sonoran Desert of Mexico, Hermosillo is the largest city with a...     

A Comparison of Household Budget Allocation Patterns Between Hispanic Americans and Non-Hispanic White Americans

The budget allocation patterns of Hispanic versus non-Hispanic White households are examined. Annual household expenditure data from 1980 to 1992 are constructed from the interview component of the Consumer Expenditure Survey (1980–1992), the Consumer Price Index (1980–1992), and the American Chamber of Commerce Researchers Association (ACCRA) Cost of Living Index (1990). The sample includes 588 Hispanic and 8,444 non-Hispanic White households. A Linear Approximation of the Almost Ideal Demand System with 23 demographic variables is estimated. Findings show that holding other things equal, compared to non-Hispanic White households, Hispanic households allocate significantly more of their budget to food at home, shelter, and apparel and significantly less to food away from home, entertainment, education, health care, and tobacco.     

Explaining the Causes and Effects of Dynamic Capabilities Generation: A Multiple‐Indicator Multiple‐Cause Modelling Approach

The purpose of this paper is to develop a multiple‐indicator multiple‐cause model to explain dynamic capabilities generation. We use one of the main common effects of dynamic capabilities (operational, structural and strategic flexibility) to design a measurement tool for dynamic capabilities generation. Based on this measurement tool, we test the influence of several factors identified in the specialized literature as potential causes that trigger and promote dynamic capabilities generation. We use data from a survey of 200 CEOs of Spanish firms to test the model. The results show that only organizations whose managers have perceived a high degree of environmental dynamism have generated dynamic capabilities. The results also show that knowledge codification and technical innovation are significantly related to dynamic capabilities generation. We attempt to shed light on current theoretical debates about dynamic capabilities generation and provide a practical guide to explain the origin and results of dynamic capabilities that have been tested empirically.     

A general equilibrium model of domestic commerce in Mexico

In this paper we develop a general equilibrium model of the Mexican economy that focuses on the commercial sector, particularly retailing. Consumers purchase goods in different retail establishments, that sell differentiated goods at different prices. Where each consumer decides to make purchases depends on various price and locational considerations. The model has been calibrated to replicate the Mexican economy in 1977, the latest year for which a complete data set is available. We use it to analyze both the impact of the 1980 fiscal reform, a major policy charge for the economy as a whole, and that of a hypothetical development project aimed specifically at the commercial sector. Although our model was conceived and developed well prior to the current period of highly inflationary policies of the debt crisis, the latter was taken into consideration during both the simulations and their policy evaluation.     

Ergonomic evaluation in a values transportation company in Venezuela

The objective was to analyze the work activity and identify risk factors that could account for musculoskeletal disorders in the upper extremities, shoulder and neck of workers of a transport values company in Venezuela. The methods used were: collective interview, tasks observation, evaluation of posture with RULA method and evaluation of repetitive motions with the OCRA method. Five workstations were evaluated. Main problem perceived by workers was: exposure to chemical and biological hazards when handling paper money and coins; inadequate chairs and close supervision. The postures level risk was 1 or 2 for the RULA scale. Only two workstations showed ligth and medium risk level by OCRA method. Conclusion: The factors identified that could explain the musculoskeletal changes were: wrist repetitive flexion and extension, shoulder elevation, lifting weight above shoulder height, elbow repetitive flexion and extension, neck flexion, extended work journey, work overload, high responsibility and strict supervision by a video camera.     

Re-Thinking Illegality as a Violence Against, not by Mexican Immigrants, Children, and Youth

Sociohistorical theory was used to examine illegality as a form of state violence that bears upon the formation of undocumented Mexican immigrants. This article proposes a theory of dialectical violence that integrates societal with personal enactments of violence through case illustrations of Mexican youth. In a grassroots association defending immigrants' rights, youth develop within conflicting discourses about undocumented immigrants proposed by society, family, and community. Methods included ethnographic analysis of the association's documents, a workshop in which five participants authored a booklet with texts and illustrations about their lives in the city, and an interview with their mothers. Findings illustrate how Mexican youth enter a cycle of violence as a result of their undocumented status, socioeconomic class, language and ethnic-racial memberships.     

The Importance of Household Management for the Business-Owning Family

The household managerial behavior of 673 business-owning families from the 1997 National Family Business Survey was examined using a scale adapted from Heck, Winter, and Stafford (1992). The scale was reliable and used to compare the managerial behavior of solo- and dual-role holders in the sample. Although t-tests revealed few significant differences between solo- and dual-role holders, factor analyses showed that the two groups differed noticeably in management style. The differences were not in the frequency of use of managerial activities but in which activities were viewed as related by the two groups.     

Recent trends in humanoid robotics research: scientific background, applications, and implications

Even though the market size is still small at this moment, applied fields of robots are gradually spreading from the manufacturing industry to the others as one of the important components to support an aging society. For this purpose, the research on human-robot interaction (HRI) has been an emerging topic of interest for both basic research and customer application. The studies are especially focused on behavioral and cognitive aspects of the interaction and the social contexts surrounding it. As a part of these studies, the term of "roboethics" has been introduced as an approach to discuss the potentialities and the limits of robots in relation to human beings. In this article, we describe the recent research trends on the field of humanoid robotics. Their principal applications and their possible impact are discussed.