Three essays on liquidity

Doutoramento em Gestão.

"I’ll call you when we are ready" (One family’s experience of critical care and end of life decision making)

The purpose of this paper is to explore through narrative accounts one family's expérience of critical care, after the admission of a family member to an Intensive Care Unit (ICU) and their subséquent death five weeks later. Numerous studies support the need for effective communication and clear information to be given to the family. In this instance it was évident from their stories that there were numerous barriers to communication, including language and a lack of insight into the needs of the family. Many families do not understand the complexities of nursing care in an ICU so lack of communication by nursing staff was identified as uncaring behavior and encounters. Facilitating a family's proximity to a dying patient and encouraging them to participate in care helps to maintain some sensé of personal control. Despite a commitment to involving family members in care, which was enshrined in the Unit Philosophy, relatives were banished to the waiting room for hours. They experienced feelings of powerlessness and helplessness as they waited with other relatives for news following investigations or until 'the doctor had completed his rounds'. Explanations of "we must make 'the patient' comfortable" was no consolation for those who wished to be involved in care. The words "I'il call you when we are ready" became a mantra to the forgotten families who waited patiently for those with power to admit them to the ICU. Implications are this family felt they were left alone to cope with the traumatic expériences leading up to and surrounding the death. They felt mainly supported by the priest, who not only administered the last rites but provided spiritual support to the family and dealt sensitively with many issues. Paternalism in décision making when there is a moral obligation to ensure that discussions on end of life dilemmas are an inclusive process with families, doctors, nurses was not understood, therefore it caused conflict within the family over EOL décision making. The family felt that the opportunity to share expériences through telling and retelling their stories would enable them to reconfigure the past and create purpose in the future.

On the kidney exchange problem: cardinality constrained cycle and chain problems on directed graphs: a survey of integer programming approaches

The Kidney Exchange Problem (KEP) is a combinatorial optimization problem and has attracted the attention from the community of integer programming/combinatorial optimisation in the past few years. Defined on a directed graph, the KEP has two variations: one concerns cycles only, and the other, cycles as well as chains on the same graph. We call the former a Cardinality Constrained Multi-cycle Problem (CCMcP) and the latter a Cardinality Constrained Cycles and Chains Problem (CCCCP). The cardinality for cycles is restricted in both CCMcP and CCCCP. As for chains, some studies in the literature considered cardinality restrictions, whereas others did not. The CCMcP can be viewed as an Asymmetric Travelling Salesman Problem that does allow subtours, however these subtours are constrained by cardinality, and that it is not necessary to visit all vertices. In existing literature of the KEP, the cardinality constraint for cycles is usually considered to be small (to the best of our knowledge, no more than six). In a CCCCP, each vertex on the directed graph can be included in at most one cycle or chain, but not both. The CCMcP and the CCCCP are interesting and challenging combinatorial optimization problems in their own rights, particularly due to their similarities to some travelling salesman- and vehicle routing-family of problems. In this paper, our main focus is to review the existing mathematical programming models and solution methods in the literature, analyse the performance of these models, and identify future research directions. Further, we propose a polynomial-sized and an exponential-sized mixed-integer linear programming model, discuss a number of stronger constraints for cardinality-infeasible-cycle elimination for the latter, and present some preliminary numerical results.

Taming transitive permission attack via bytecode rewriting on Android application

Google Android is popular for mobile devices in recent years. The openness and popularity of Android make it a primary target for malware. Even though Android's security mechanisms could defend most malware, its permission model is vulnerable to transitive permission attack, a type of privilege escalation attacks. Many approaches have been proposed to detect this attack by modifying the Android OS. However, the Android's fragmentation problem and requiring rooting Android device hinder those approaches large-scale adoption. In this paper, we present an instrumentation framework, called SEAPP, for Android applications (or “apps”) to detect the transitive permission attack on unmodified Android. SEAPP automatically rewrites an app without requiring its source codes and produces a security-harden app. At runtime, call-chains are built among these apps and detection process is executed before a privileged API is invoked. Our experimental results show that SEAPP could work on a large number of benign apps from the official Android market and malicious apps, with a repackaged success rate of over 99.8%. We also show that our framework effectively tracks call-chains among apps and detects known transitive permission attack with low overhead. Copyright © 2016 John Wiley & Sons, Ltd.

“Intrinsic time” and the minimal self: reflections on the methodological and metaphysical significance of temporal experience

This book investigates the complex, sometimes fraught relationship between phenomenology and the natural sciences. The contributors attempt to subvert and complicate the divide that has historically tended to characterize the relationship between the two fields. Phenomenology has traditionally been understood as methodologically distinct from scientific practice, and thus removed from any claim that philosophy is strictly continuous with science. There is some substance to this thinking, which has dominated consideration of the relationship between phenomenology and science throughout the twentieth century. However, there are also emerging trends within both phenomenology and empirical science that complicate this too stark opposition, and call for more systematic consideration of the inter-relation between the two fields. These essays explore such issues, either by directly examining meta-philosophical and methodological matters, or by looking at particular topics that seem to require the resources of each, including imagination, cognition, temporality, affect, imagery, language, and perception.

A question mark on iron deficiency in 185 million people of Pakistan: its outcomes and prevention

Micronutrient deficiency especially the iron deficiency is the bane of our lives, affecting all strata of society. Unfortunately, the women during pregnancy, adolescence, and children are under this curse particularly in developing countries like Pakistan. It is one of the biggest reasons of complications during pregnancy and malnourished children under five years of age. Maternal death, still-births, and underweight births are most common consequences of iron deficiency and these outbreaks as iron-deficiency anemia in Pakistan. Disastrous nature of iron deficiency requires an urgent call to eradicate it. Hence, the solution should not be frail comparing with the huge economic loss and other incompatibilities. Flour fortification, supplementation, dietary diversification, and especially maternal education are possible solutions for combating this micronutrient deficiency.

'A chart for further exploration and a kind of rallying call': James Moffett and english curriculum history in Victoria

Both James Britton and James Moffett were keynote speakers at the Sydney International Federation for the Teaching of English conference in 1980 - a fact reflective of the wide recognition and acceptance of their work and influence throughout Australia by that time. In Victoria, Moffett's writings became known initially through teacher education, in particular at the University of Melbourne and the State College of Victoria, Rusden, then through the visits and writing of figures from the London Institute and others, and through the State and national English teaching association, the Australian Association for the Teaching of English. In the 1970s, Moffett's influence in Victoria came rather through the mix of his vision and writing, both theoretical and practical, in conjunction with others in Australia and elsewhere. This paper takes two separate but related sites or moments in English education in the 1970s in the Australian city of Melbourne, Victoria, as instances of the permeating influence of Moffett's work - in conjunction with leading figures from the London School associated with the 'New' English' - on education discourses and practice in that State's English curriculum history. It concludes with a consideration of the ways in which Moffett's work might still act as a 'rallying call' today.

Factors affecting the adoption of new technology: The case of 311 government call centers

Government call centers (311) were first created to reduce the volume of non-emergency calls that were being placed to emergency 911 call centers. The number of 311 call centers increased from 57 in 2008 to about 300 in 2013. Considering that there are over 2,700 municipal government units across the United States, the adoption rate of the 311 centers is arguably low in the country. This dissertation is an examination of the adoption of 311 call centers by municipal governments. My focus is specifically on why municipal governments adopt 311 and identifying which barriers result in the non-adoption of 311 call centers. This dissertation is possibly the first study to examine the adoption of 311 call centers in the United States. ^ The dissertation study has identified several significant factors in the adoption and non-adoption of 311 government call centers. The following factors were significant in the adoption of 311 government call centers: managerial support, financial constraints, organizational responsiveness, strategic plan placement, and technology champion. The following factors were significant barriers that resulted in the non-adoption of a 311 government call center; no demand from citizens, start up costs, annual operating costs, unavailability of funding, and no obvious need for one. ^ If local government entities that do not have a 311 government call center decide to adopt one, this study will help them identify the conditions that need to be in place for successful adoption to occur. Local government officials would first need to address the barriers in setting up the 311 call centers. ^

Call & response -- Fall 2012

Call & Response is the newsletter of the South Carolina African American Heritage Commission, whose mission is to identify and promote the preservation of historic sites, structures, buildings, and culture of the African American experience in South Carolina. This is volume X number 2 and includes a message from the chair, list of board members, spotlight on Vitoria A. Smalls and the agenda for the annual conference and awards ceremony.

Call & response -- Spring 2012

Call & Response is the newsletter of the South Carolina African American Heritage Commission, whose mission is to identify and promote the preservation of historic sites, structures, buildings, and culture of the African American experience in South Carolina. This is volume X number 2 and includes a message from the chair, list of board members, spotlight on Vitoria A. Smalls and the agenda for the annual conference and awards ceremony.

Call & response -- Winter 2012

Call & Response is the newsletter of the South Carolina African American Heritage Commission, whose mission is to identify and promote the preservation of historic sites, structures, buildings, and culture of the African American experience in South Carolina. This is volume X number 2 and includes a message from the chair, list of board members, spotlight on Vitoria A. Smalls and the agenda for the annual conference and awards ceremony.

Call & response -- Fall 2013

Call & Response is the newsletter of the South Carolina African American Heritage Commission, whose mission is to identify and promote the preservation of historic sites, structures, buildings, and culture of the African American experience in South Carolina. This is volume X number 2 and includes a message from the chair, list of board members, spotlight on Vitoria A. Smalls and the agenda for the annual conference and awards ceremony.

Call & response -- Spring/Summer 2013

Call & Response is the newsletter of the South Carolina African American Heritage Commission, whose mission is to identify and promote the preservation of historic sites, structures, buildings, and culture of the African American experience in South Carolina. This is volume X number 2 and includes a message from the chair, list of board members, spotlight on Vitoria A. Smalls and the agenda for the annual conference and awards ceremony.

Call & response -- Spring/Summer 2014

Call & Response is the newsletter of the South Carolina African American Heritage Commission, whose mission is to identify and promote the preservation of historic sites, structures, buildings, and culture of the African American experience in South Carolina. This is volume X number 2 and includes a message from the chair, list of board members, spotlight on Vitoria A. Smalls and the agenda for the annual conference and awards ceremony.

Call & response -- Winter 2014

Call & Response is the newsletter of the South Carolina African American Heritage Commission, whose mission is to identify and promote the preservation of historic sites, structures, buildings, and culture of the African American experience in South Carolina. This is volume X number 2 and includes a message from the chair, list of board members, spotlight on Vitoria A. Smalls and the agenda for the annual conference and awards ceremony.