Computer program for the prediction of reorientation flow dynamics

Program uses Navier-Stokes and continuity equations for incompressible, viscous fluid as the basic equations governing reorientation flow dynamics. Program can simulate curved as well as straight-walled boundaries; has ability to calculate both free-surface and confined flows; and can be used in either cylindrical or plane geometry

Couples Facing Adversity through Stroke and Malignant Brain Tumour: A Qualitative Investigation

Literature review: Objectives: Historically most qualitative research on the couple experience of stroke has focused on the negative impact, including reviews that outline challenges for couple’s communication, roles and intimacy. The current review aims to examine the perceived positive impact of stroke on couple relationships from the perspective of stroke survivors and spouses. Methods: Relevant qualitative literature was identified through systematic searching of the databases Medline, PsycInfo and EMBASE. Thirty-two articles met the inclusion/exclusion criteria. The articles were appraised using the Critical Appraisal Skills Programme tool and a thematic synthesis was conducted on the findings from these articles. Results: Ten descriptive and three analytical themes were identified. The analytical themes showed a strengthening of the couple bond, an enhanced way of couple’s relating and empowerment of the spousal caregiver in the stroke survivor’s recovery. Conclusions: The review identifies that couples can engage with dyadic coping and enhance their pre-stroke relationship through the experience of stroke. Rehabilitation staff, inclusive of clinical psychologists, can play an important role in engaging and empowering couples to recognise and utilise their strengths and resilience. Future research could examine how rehabilitation can utilise these findings in practice and the efficacy of couple’s therapy in this population. Empirical paper: Abstract Objectives: To explore the impact of relational dynamics on couples impacted by malignant brain tumour, with the aim of expanding the knowledge we have about the impact of brain tumour from the perspective of the patient, carer and couple. The current research gives a different perspective of the relational impact of this illness through use of discourse analysis and joint interviews. Methods: Six heterosexual couples took part in the research which involved conducting joint semi-structured interviews with the couple in their homes. The interviews were analysed using a discourse analysis approach to observe how the couples constructed meaning about their shared experience of a brain tumour and its impact on the couple relationship. Results: Couples used rhetorical strategies, such as humour and deflection, to ease discomfort and navigate the sensitive topic. Discourses used by both partners highlights that the journey can be one of isolation, despite the presence of a partner. In contradiction, the couple were often positioned together, against the brain tumour itself, in a position of dyadic coping. Conclusions: Conversations about the impact of brain tumour are highly sensitive. As a result, couples implement strategies in order to communicate their difficulties, their distress and challenging elements such as death and uncertainty of the future. Clinical implications are offered for how health care professionals facilitate discussions between couples and how the dynamic between a couple can be supported in hospitals, rehabilitation and in the community

SlowFuzz: Automated Domain-Independent Detection of Algorithmic Complexity Vulnerabilities

Algorithmic complexity vulnerabilities occur when the worst-case time/space complexity of an application is significantly higher than the respective average case for particular user-controlled inputs. When such conditions are met, an attacker can launch Denial-of-Service attacks against a vulnerable application by providing inputs that trigger the worst-case behavior. Such attacks have been known to have serious effects on production systems, take down entire websites, or lead to bypasses of Web Application Firewalls. Unfortunately, existing detection mechanisms for algorithmic complexity vulnerabilities are domain-specific and often require significant manual effort. In this paper, we design, implement, and evaluate SlowFuzz, a domain-independent framework for automatically finding algorithmic complexity vulnerabilities. SlowFuzz automatically finds inputs that trigger worst-case algorithmic behavior in the tested binary. SlowFuzz uses resource-usage-guided evolutionary search techniques to automatically find inputs that maximize computational resource utilization for a given application.Comment: ACM CCS '17, October 30-November 3, 2017, Dallas, TX, US

Karl S. Betts to Dr. Silver, 13 August 1958

Professional correspondenc

To chain or not to chain trade-weighted exchange rate indexes

With the advent of chain calculations for the U.S. national income and product accounts, it seems reasonable to contemplate using the chain approach for other indexes, such as trade-weighted exchange rates (TWEXs). A fundamental criticism of measuring the growth of gross domestic product by a fixed-base-year method is that the estimates are highly sensitive, especially when the economy?s structure is changing dramatically, to the arbitrary choice of the base year. Such a criticism can be levied against TWEXs. In fact, even TWEXs constructed using a Paasche index rather than a Laspeyres index have problems related to base periods. We examine theoretically and empirically the use ofa chain TWEX in relation to two well-known TWEX indexes: the Federal Reserve Bank of Atlanta index, which uses a Laspeyres index, and the Federal Reserve Bank of Dallas index, which uses a Paasche index. The choice of base year alters the behavior ofthe dollar in these two indexes. We contrast this result with the behavior of the dollar in comparable chain TWEXs, where the base year sensitivity is absent. Our results indicate that developers of TWEXs, as well as those revising TWEXs, should consider a chain approach. Furthermore, users need to be aware of the sensitivity of TWEXs to changes in either the base period for trade weights or the reference base period for exchange ratesForeign exchange rates ; Dollar, American

Conservative Revolutionary Intellectuals in the Weimar Republic and National Socialist Germany: Carl Schmitt, Martin Heidegger, and Ernst Jϋnger

This thesis will examine the writings and career/life paths of three conservative revolutionary intellectuals during the Weimar Republic and National Socialist Germany. The purpose of this examination is not only to provide an overview of the development of conservative revolutionary thought in Germany after World War I, but also to investigate the influence these intellectuals had on the National Socialists\u27 seizure and consolidation of power. The works and lives of three important intellectuals will be examined: Carl Schmitt, Martin Heidegger, and Ernst Jünger. In combination with scholarly secondary literature, this thesis will be based mostly on translated primary writings