Formalization and visualization of domain-specific software architectures

This paper describes a domain-specific software design system based on the concepts of software architectures engineering and domain-specific models and languages. In this system, software architectures are used as high level abstractions to formulate a domain-specific software design. The software architecture serves as a framework for composing architectural fragments (e.g., domain objects, system components, and hardware interfaces) that make up the knowledge (or model) base for solving a problem in a particular application area. A corresponding software design is generated by analyzing and describing a system in the context of the software architecture. While the software architecture serves as the framework for the design, this concept is insufficient by itself for supplying the additional details required for a specific design. Additional domain knowledge is still needed to instantiate components of the architecture and develop optimized algorithms for the problem domain. One possible way to obtain the additional details is through the use of domain-specific languages. Thus, the general concept of a software architecture and the specific design details provided by domain-specific languages are combined to create what can be termed a domain-specific software architecture (DSSA)

Patterns of War Termination: A Statistical Approach

This research uses an advanced statistical technique to expand upon the current understanding of war termination. Specifically, this thesis addressed questions concerning the most relevant factors toward predicting both the outcomes of interstate wars and the winners of intrastate and extra-systemic wars, within the limitations of the available data. Open-source war data from the Correlates of War Project was analyzed using both binary and multinomial logistic regression techniques. While the Correlates of War Project did not necessarily focus its data collection efforts on those variables historically associated with war termination, it did provide a sufficient number of variables with which to demonstrate the applicability of logistic regression techniques to war termination analyses. As a consequence, every significant logistic regression model contains a single relevant variable. For both intrastate and extra-systemic wars, the duration of the conflict was found to be most relevant to predicting the winner. In contrast, the proportion of total casualties borne by a nation in an interstate war was most relevant to predicting the manner in which an interstate war ends. Conclusions drawn from this research and suggestions for future statistical applications to war termination studies were also discussed

H-alpha Activity of Old M Dwarfs: Stellar Cycles and Mean Activity Levels For 93 Low-Mass Stars in the Solar Neighborhood

Through the McDonald Observatory M Dwarf Planet Search, we have acquired nearly 3,000 high-resolution spectra of 93 late-type (K5-M5) stars over more than a decade using HET/HRS. This sample provides a unique opportunity to investigate the occurrence of long-term stellar activity cycles for low-mass stars. In this paper, we examine the stellar activity of our targets as reflected in the H-alpha feature. We have identified periodic signals for 6 stars, with periods ranging from days to more than 10 years, and find long-term trends for 7 others. Stellar cycles with P > 1 year are present for at least 5% of our targets. Additionally, we present an analysis of the time-averaged activity levels of our sample, and search for correlations with other stellar properties. In particular, we find that more massive, earlier type (M0-M2) stars tend to be more active than later type dwarfs. Furthermore, high-metallicity stars tend to be more active at a given stellar mass. We also evaluate H-alpha variability as a tracer of activity-induced radial velocity (RV) variation. For the M dwarf GJ 1170, H-alpha variation reveals stellar activity patterns matching those seen in the RVs, mimicking the signal of a giant planet, and we find evidence that the previously identified stellar activity cycle of GJ 581 may be responsible for the recently retracted planet f (Vogt et al. 2012) in that system. In general, though, we find that H-alpha is not frequently correlated with RV at the precision (typically 6-7 m/s) of our measurements.Comment: Submitted to ApJ. Reflects comments from a positive refere

RELATIONSHIP BETWEEN SCRUMMAGING STRENGTH AND STANDARD FIELD TESTS FOR POWER IN RUGBY

INTRODUCTION: In the game of rugby, the development of leg power is of particular importance for forwards in the scrum and maul. The forward is required to hold the push in the scrum and give an explosive push when the ball is put in. The most frequently used standard field tests for leg power according to Nicholas (1997), which are also recommended in numerous training manuals and by the England Rugby Football Union (RFU), are the vertical jump and a timed short sprint test. This study was designed to compare performance scores attained and the maximal force applied in these tests with the maximal force which could be applied against the pneumatically controlled Predator individual scrummaging machine

A creep model for metallic composites based on matrix testing: Application to Kanthal composites

An anisotropic creep model is formulated for metallic composites with strong fibers and low to moderate fiber volume percent (less than 40 percent). The idealization admits no creep in the local fiber direction and assumes equal creep strength in longitudinal and transverse shear. Identification of the matrix behavior with that of the isotropic limit of the theory permits characterization of the composite through uniaxial creep tests on the matrix material. Constant and step-wise creep tests are required as a data base. The model provides an upper bound on the transverse creep strength of a composite having strong fibers embedded in a particular matrix material. Comparison of the measured transverse strength with the upper bound gives an assessment of the integrity of the composite. Application is made to a Kanthal composite, a model high-temperature composite system. Predictions are made of the creep response of fiber reinforced Kanthal tubes under interior pressure

ASSESSMENT OF SCRUMMAGING PERFORMANCE USING A PNEUMATICALLY CONTROLLED INDIVIDUAL SCRUM MACHINE

INTRODUCTION: The game of rugby places specific physical performance demands on players due to the unique phases inherent within the game. Scrummaging is a vital phase of the game, in which domination boosts the whole team performance as a result of pressurising the opposition and denying them quality possession (Greenwood, 1992). Effective scrummaging requires not only explosive leg power, but also the correct technique in order to control and channel the power within the positional constraints of the scrum. To accurately assess the scrummaging performance of players, tests must incorporate the specific technical skills required during scrummaging. The purpose of this study was to evaluate the capabilities of the pneumatically controlled Predator individual scrummaging machine to effectively assess scrummaging performance

Herschel Observations and Updated Spectral Energy Distributions of Five Sunlike Stars with Debris Disks

Observations from the Herschel Space Observatory have more than doubled the number of wide debris disks orbiting Sunlike stars to include over 30 systems with R > 100 AU. Here we present new Herschel PACS and re-analyzed Spitzer MIPS photometry of five Sunlike stars with wide debris disks, from Kuiper belt size to R > 150 AU. The disk surrounding HD 105211 is well resolved, with an angular extent of >14" along the major axis, and the disks of HD 33636, HD 50554, and HD 52265 are extended beyond the PACS PSF size (50% of energy enclosed within radius 4.23"). HD 105211 also has a 24-micron infrared excess that was previously overlooked because of a poorly constrained photospheric model. Archival Spitzer IRS observations indicate that the disks have small grains of minimum radius ~3 microns, though the minimum grain gradius is larger than the radiation pressure blowout size in all systems. If modeled as single-temperature blackbodies, the disk temperatures would all be <60 K. Our radiative transfer models predict actual disk radii approximately twice the radius of model blackbody disks. We find that the Herschel photometry traces dust near the source population of planetesimals. The disk luminosities are in the range 0.00002 <= L/L* <= 0.0002, consistent with collisions in icy planetesimal belts stirred by Pluto-size dwarf planets.Comment: Accepted for publication in ApJ. 18 pages, including 10 figures and 3 table

A comprehensive evaluation of rhythm monitoring strategies for the detection of atrial fibrillation recurrence: insights from 647 continuously monitored patients and implications for monitoring after therapeutic interventions

No description supplie

The Origins of Shared Intuitions of Justice

Contrary to the common wisdom among criminal law scholars, empirical evidence reveals that people\u27s intuitions of justice are often specific, nuanced, and widely shared. Indeed, with regard to the core harms and evils to which criminal law addresses itself-physical aggression, takings without consent, and deception in transactions-the shared intuitions are stunningly consistent across cultures as well as demographics. It is puzzling that judgments of moral blameworthiness, which seem so complex and subjective, reflect such a remarkable consensus. What could explain this striking result? The authors theorize that one explanation may be an evolved predisposition toward these shared intuitions of justice, arising from the advantages that they provided, including stability, predictability, and the facilitation of beneficial exchange-the cornerstones to cooperative action and its accompanying survival benefits. Recent studies in animal behavior and brain science are consistent with this hypothesis, suggesting that moral judgment not only has biological underpinnings, but also reflects the effects of evolutionary processes on the distinctly human mind. Similarly, the child development literature provides evidence of predictable stages in the development of moral judgment within each individual, from infancy through adulthood, that are universal across all demographics and cultures. The current evidence does not preclude alternative explanations. Shared views of justice might arise, for example, through general social learning. However, a social learning explanation faces a variety of difficulties. It assumes that individuals will adopt norms good for the group at the expense of self-interest. It assumes an undemonstrated human capacity to assess extremely complex issues, such as what will be an efficient norm. It predicts that the significant variation in circumstances among different groups would give rise to commensurately different norms and variation in the effectiveness of teaching them. It is inconsistent with the developmental data that show intuitions of justice appearing early, before social learning of such complexity is possible. And, finally, a general social learning explanation predicts views of justice as accessible, reasoned knowledge, rather than the inaccessible, intuitive knowledge that we know them commonly to be. Whatever the correct explanation for the consensus puzzle, intuitions of justice seem to be an inherent part of being human and this, in turn, can have important implications for criminal law and criminal justice policy