Aspect] is a simple and practical aspect-oriented extension to Java With just a few new constructs, AspectJ provides support for modular implementation of a range of crosscutting concerns. In AspectJ's dynamic join point model, join points are well-defined points in the execution of the program; pointcuts are collections of join points; advice are special method-like constructs that can be attached to pointcuts; and aspects are modular units of crosscutting implementation, comprising pointcuts, advice, and ordinary Java member declarations. AspectJ code is compiled into standard Java bytecode. Simple extensions to existing Java development environments make it possible to browse the crosscutting structure of aspects in the same kind of way as one browses the inheritance structure of classes. Several examples show that AspectJ is powerful, and that programs written using it are easy to understand.

An overview of AspectJ

Foundations Of Statistics

Pulsatile blood flow through the cavities of the heart and great vessels is time-varying and multidirectional. Access to all regions, phases and directions of cardiovascular flows has formerly been limited. Four-dimensional (4D) flow cardiovascular magnetic resonance (CMR) has enabled more comprehensive access to such flows, with typical spatial resolution of 1.5×1.5×1.5 – 3×3×3 mm3, typical temporal resolution of 30–40 ms, and acquisition times in the order of 5 to 25 min. This consensus paper is the work of physicists, physicians and biomedical engineers, active in the development and implementation of 4D Flow CMR, who have repeatedly met to share experience and ideas. The paper aims to assist understanding of acquisition and analysis methods, and their potential clinical applications with a focus on the heart and greater vessels. We describe that 4D Flow CMR can be clinically advantageous because placement of a single acquisition volume is straightforward and enables flow through any plane across it to be calculated retrospectively and with good accuracy. We also specify research and development goals that have yet to be satisfactorily achieved. Derived flow parameters, generally needing further development or validation for clinical use, include measurements of wall shear stress, pressure difference, turbulent kinetic energy, and intracardiac flow components. The dependence of measurement accuracy on acquisition parameters is considered, as are the uses of different visualization strategies for appropriate representation of time-varying multidirectional flow fields. Finally, we offer suggestions for more consistent, user-friendly implementation of 4D Flow CMR acquisition and data handling with a view to multicenter studies and more widespread adoption of the approach in routine clinical investigations.

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4D flow cardiovascular magnetic resonance consensus statement

Computer Controlled Systems: Theory and Design

There were three epochs of growth experience after the mid 19th century for what is now called the OECD 'club'; the late 19th century, the middle years between 1914 and 1950, and the late 20th century. The late 19th and the late 20th century epochs were ones of overall fast growth and convergence: poor countries tended to grow even faster than rich and the economic gap between rich and poor countries diminished. The middle years were ones of overall slow growth and divergence: poor countries tended to grow even slower than rich and the economic gap between rich and poor countries widened. Since the middle years were also ones of economic autarky and 'de-globalization', while the rest were ones of increasing globalization in world commodity and factor markets, history offers an unambiguous positive correlation between globalization and convergence. But is the correlation spurious? When the pre-World War I years are examined in detail, the correlation turns out to be causal: the globalization of commodity and factor markets served to play a critical, perhaps the critical, role in contributing to convergence. A century and a half of OECD club history also suggests that economists should pay more attention to who gains and who loses from convergence since the answers may help determine whether pro-globalization or anti- globalization policies will persist.

Globalization, Convergence and History

This paper presents newly constructed series on human capital in Sweden 1870–2000. The estimates are based on enrolment in different forms of education, stretching as far back as 1812, and the size and age distribution of the population within age range 15–65 years. The secular accumulation of human capital has closely matched the long-term trend in aggregate productivity and both grew at a rate of 2.4% annually. Our estimates differ significantly from the data attributed to Sweden in the international short-cut estimates of human capital for the period since 1960. The basic question addressed is about causality: whether human capital causes economic growth or if causality goes in the other direction. We address this problem with modified Granger-causality tests. According to our results, changes in the stock of human capital have in a systematic way preceded changes in aggregate productivity up to the structural crisis in the 1970s. This allows us to conclude that human capital has been a causal factor in Swedish economic growth since the industrialisation. However, after 1975, the growth of human capital has not been able to match the demands of the third industrial revolution.

Human capital and economic growth: Sweden 1870–2000

Robots used in manufacturing today are tailored to their tasks by system integration based on expert knowledge concerning both production and machine control. For upcoming new generations of even more flexible robot solutions, in applications such as dexterous assembly, the robot setup and programming gets even more challenging. Reuse of solutions in terms of parameters, controls, process tuning, and of software modules in general then gets increasingly important. There has been valuable progress within reuse of automation solutions when machines comply with standards and behave according to nominal models. However, more flexible robots with sensor-based manipulation skills and cognitive functions for human interaction are far too complex to manage, and solutions are rarely reusable since knowledge is either implicit in imperative software or not captured in machine readable form. We propose techniques that build on existing knowledge by converting structured data into an RDF-based knowledge base. By enhancements of industrial control systems and available engineering tools, such knowledge can be gradually extended as part of the interaction during the definition of the robot task.

/pdf/on-the-integration-of-skilled-robot-motions-for-productivity-w10az774sx.pdf

On the integration of skilled robot motions for productivity in manufacturing

This article describes the work in progress on knowledge-based reconfiguration of a class of automation systems. The knowledge about manufacturing is represented in a number of formalisms and gathered around an ontology expressed in OWL, that allows generic reasoning in description logic. In the same time multiple representations facilitate efficient processing by a number of special-purpose reasoning modules, specific for the application domain. At the final stage of reconfiguration we exploit ontology-based rewriting, simplifying creation of the final configuration files.

Knowledge-Based Reconfiguration of Automation Systems

https://lup.lub.lu.se/search/ws/files/3646302/5464138.pdf

On the perceived usefulness of risk descriptions for decision-making in disaster risk management

PURPOSE: To evaluate accuracy and noise properties of a novel time-resolved, three-dimensional, three-directional phase contrast sequence with variable velocity encoding (denoted 4D-vPC) on a 3 Tesla MR system, and to investigate potential benefits and limitations of variable velocity encoding with respect to depicting blood flow patterns. MATERIALS AND METHODS: A 4D PC-MRI sequence was modified to allow variable velocity encoding (VENC) over the cardiac cycle in all three velocity directions independently. 4D-PC sequences with constant and variable VENC were compared in a rotating phantom with respect to measured velocities and noise levels. Additionally, comparison of flow patterns in the ascending aorta was performed in six healthy volunteers. RESULTS: Phantom measurements showed a linear relationship between velocity noise and velocity encoding. 4D-vPC MRI presented lower noise levels than 4D-PC both in phantom and in volunteer measurements, in agreement with theory. Volunteer comparisons revealed more consistent and detailed flow patterns in early diastole for the variable VENC sequences. CONCLUSION: Variable velocity encoding offers reduced noise levels compared with sequences with constant velocity encoding by optimizing the velocity-to-noise ratio (VNR) to the hemodynamic properties of the imaged area. Increased VNR ratios could be beneficial for blood flow visualizations of pathology in the cardiac cycle. J. Magn. Reson. Imaging 2012. © 2012 Wiley Periodicals, Inc. (Less)

https://onlinelibrary.wiley.com/doi/pdf/10.1002/jmri.23778

Anders Nilsson

Papers

Human capital and economic growth: Sweden 1870–2000

On the integration of skilled robot motions for productivity in manufacturing

Knowledge-Based Reconfiguration of Automation Systems

On the perceived usefulness of risk descriptions for decision-making in disaster risk management

Variable velocity encoding in a three-dimensional, three-directional phase contrast sequence: Evaluation in phantom and volunteers.