How to Establish an Urban Agriculture Ordinance

How to establish an arrhythmia unit in the 21st century.

Arrhythmia and cardiac electrophysiology services are an innovative and fast-growing branch of clinical cardiology. Initiating an arrhythmia unit involves proper selection of personnel, as well as technical, structural, and organizational requirements. Proper selection of personnel includes specialized and well-trained physicians, nurses, and medical technicians in the electrophysiology laborat...

Urban agriculture

This paper describes the scale and nature of agricultural production in urban, suburban and peri-urban zones of Mexico City and how these have adapted to the changing demands from urban populations for food, wood and recreation. It also demonstrates how agricultural producers have successfully adapted their products and their production methods, including building on traditional production syst...

Urban and Peri-urban Agriculture

How to Establish Clinical Prediction Models

A clinical prediction model can be applied to several challenging clinical scenarios: screening high-risk individuals for asymptomatic disease, predicting future events such as disease or death, and assisting medical decision-making and health education. Despite the impact of clinical prediction models on practice, prediction modeling is a complex process requiring careful statistical analyses ...

How to establish universal block-matrix factorizations

A general method is presented for establishing universal factorization equalities for 2×2 and 4×4 block matrices. As applications, some universal factorization equalities for matrices over four-dimensional algebras are established, in particular, over the Hamiltonian quaternion algebra.