The Lawrence-Sullivan construction is the right model of I+I^+

We prove that the universal enveloping algebra of the Lawrence-Sullivan construction is a particular perturbation of the complete Baues-Lemaire cylinder of $S^0$. Together with other evidences we present, this exhibits the Lawrence-Sullivan construction as the right model of $I^+$. From this, we also deduce a generalized Euler formula on Bernoulli numbers.Comment: 13 page

Garbage Beam

Located in a hot desert climate area prone to strong winds, Egypt is made up of many homes with little to no roofing leaving civilians exposed to the harsh elements. The overarching goal of this project is to provide these homes with efficient and affordable roofing using concrete with common garbage materials as reinforcement. Through preliminary testing and tensile testing it was possible to narrow the focus down to two reinforcement materials: fish netting and plastic grocery bags. From there final beam testing and pull out testing successfully demonstrated the promise of these materials. With this, however, it is still important to continue research on the materials and improve on the design in order to eventually create a one-way slab roof and pass that design over to an NGO that can successfully implement it

Entrepreneurship

Economic development ; Small business

Local income inequality

Income distribution

U.S. migration over the life cycle

Migration incentives for working-age and retired individuals are quite different and are sensitive to the level of human capital within the family.Immigrants ; Migration, Internal - United States

Latin American Unions and the Reform of Social Service Delivery Systems: Institutional Constraints and Policy Choice

Recent policy debates on the reform of social service delivery systems focus on the decentralization of services and the introduction of competition in order to improve the quality of services. Despite the common assumption that public sector unions oppose these reforms, their responses were diverse. This paper argues that the structure of union organization and the environment of party and union competition are fundamental for understanding union policy preferences and strategic choices regarding the reforms of social service delivery systems. Mexico and Argentina education and health reforms in the early 1990s are used to illustrate the influence of these institutional features on the policy preferences and strategic choices of public sector unions.