P-matrices and signed digraphs

We associate a signed digraph with a list of matrices whose dimensions permit them to be multiplied, and whose product is square. Cycles in this graph have a parity, that is, they are either even (termed e-cycles) or odd (termed o-cycles). The absence of e-cycles in the graph is shown to imply that the matrix product is a P0-matrix, i.e., all of its principal minors are nonnegative. Conversely, the presence of an e-cycle is shown to imply that there exists a list of matrices associated with the graph whose product fails to be a P0-matrix. The results generalise a number of previous results relating P- and P0-matrices to graphs

The East Midlands in 2010: the spatial economy of the East Midlands

The East Midlands in 2010 is the updated evidence base that supports the regional economic strategy, A Flourishing Region. This document presents detailed analysis of the spatial economy of the East Midlands

The East Midlands in 2010: executive summary

The East Midlands in 2010 is the updated evidence base that supports the regional economic strategy, A Flourishing Region. It presents a statistical portrait of the region covering demography, housing, economy & productivity, the labour market, deprivation & economic inclusion, transport, infrastructure & development, the environment and the spatial structure of the economy along with a series of sub-regional profiles. This document is the executive summary

The East Midlands in 2010: introduction

The East Midlands in 2010 is the updated evidence base that supports the regional economic strategy, A Flourishing Region. It presents a statistical portrait of the region covering demography, housing, economy & productivity, the labour market, deprivation & economic inclusion, transport, infrastructure & development, the environment and the spatial structure of the economy along with a series of sub-regional profiles. This document is the introduction

The fate of failed renal homografts retained after retransplantation

The fate of nonfunctioning or poorly functioning renal homografts which were left in situ at retransplantation was studied in 28 patients. In one recipient, lethal septicemia developed secondary to necrosis as well as infection of a retained intraabdominal graft. In three other patients, subsequent symptoms developed from retained extraperitoneal pelvic grafts, and these kidneys were removed without complication. It is suggested that grafts placed extraperitoneally can be left in place if retransplantation becomes necessary, provided that there is careful follow up study for signs of necrosis or infection. Removal of the kidney graft then may be performed electively at a later time, or this may never become necessary in a significant number of patients

How to Strengthen and Reform Indian Medical Education System: Is Nationalization the Only Answer?

As India marches towards an exciting new future of growth and progress, medical education will play pivotal role in crafting a sustained development agenda. Efforts have to be undertaken to create a medical educational system that nourishes innovation, entrepreneurship and addresses the skill requirement of the growing economy. Last decade has been witness to phenomenal growth in numbers of the medical colleges, nursing colleges and other similar training institutions. This unregulated rapid growth in number of medical colleges has adversely impacted quality of training in India’s medical institutions. The policy of privatization of medical care has seriously undermined health services and further limited the access of the underprivileged. Therefore the only solution is centralization or nationalization or globalization of the entire medical education and health sectors or to join hands with world health organization, So that a uniform health cares facility can be given to each and every human being