On the mechanism of irradiation enhanced exchange bias

By means of layer resolved ion irradiation the mechanisms involved in the irradiation driven modifications of the exchange bias effect in NiFe/FeMn bilayers have been investigated. It is shown that not only the locations of the defects but also the magnetic coupling between both layers during the irradiation process is of crucial importance. This requires an extension of current models accounting for defects in exchange bias systems.Comment: 3 pages, 3 figures, revised version, added results from further structural characterization by TEM, submitted to Europhysics Letter

Evidence-Based Promulgation: The Rulemaking Process for Rules of Professional Conduct

This Article proceeds in three parts. Part I considers variation in the rule promulgation process across the states. Part II identifies ways in which the promulgation process might be reformed on the basis of empirical evidence. Part III considers the potential benefits and limitations to this approach and is followed by a brief conclusio

The Future Is ̶B̶r̶i̶g̶h̶t̶ Complicated: AI, Apps & Access to Justice

As advances in legal technology reshape boundaries between lawyers and clients, some scholars foresee increased access to civil justice. Do-It-Yourself (DIY) estate planning through the use of online forms is frequently offered as evidence of this phenomenon. In this article, I take seriously this prediction, assessing the extent to which technology is likely to increase access to estate planning. In doing so, I identify several themes that complicate predictions for legal technology’s potential to increase access to justice. First, I highlight the potential of legal technology to reproduce, rather than ameliorate, existing social inequalities. Second, I note the challenges raised by complete automation. Finally, I discuss the role of regulatory and doctrinal reforms in determining the trajectory of legal technology. The analysis serves as a useful illustration of the need to ground our expectations for legal technology in empirical realities

Do Lawyers Matter? The Effect of Legal Representation in Civil Disputes

With declining law school enrollments, rising rates of pro se litigation, increasing competition from international lawyers and other professionals, and disparaging assessments from the Supreme Court, the legal profession is under increasing attack. Recent research suggesting that legal representation does not benefit clients has further fueled an existential anxiety in the profession. Are lawyers needed and do they matter? In this Article, we review the existing empirical research on the effect of legal representation on civil dispute outcomes. Although the pattern of results has complexities, across a wide range of substantive areas of law (housing, governmental benefits, family law, employment law, small claims, tax, bankruptcy, and torts), professional legal representation is associated with better outcomes for litigants. Only in juvenile court (and perhaps in cases involving claims to government benefits) is the benefit of representation unclear

Damped and sub-damped Lyman-α absorbers in z > 4 QSOs

We present the results of a survey of damped (DLA, log N(H I) > 20.3) and sub-damped Lyman-α systems (19.5 2.55 along the lines-of-sight to 77 quasars with emission redshifts in the range 4 19.5 were detected of which 40 systems are damped Lyman-α systems for an absorption length of ΔX = 378. About half of the lines of sight of this homogeneous survey have never been investigated for DLAs. We study the evolution with redshift of the cosmological density of the neutral gas and find, consistent with previous studies at similar resolution, that Ω_(DLA,HI) decreases at z > 3.5. The overall cosmological evolution of Ω_(HI) shows a peak around this redshift. The H I column density distribution for log N(H I) ≥ 20.3 is fitted, consistent with previous surveys, with a single power-law of index α ~ −1.8 ± 0.25. This power-law overpredicts data at the high-end and a second, much steeper, power-law (or a gamma function) is needed. There is a flattening of the function at lower H I column densities with an index of α ~ −1.4 for the column density range log N(H I) = 19.5−21. The fraction of H I mass in sub-DLAs is of the order of 30%. The H I column density distribution does not evolve strongly from z ~ 2.5 to z ~ 4.5

Capabilities of macroscopic forming simulation for large-scale forming processes of dry and impregnated textiles

Forming of continuously fibre-reinforced polymers (CoFRP) has a significant impact on the structural performance of composite components, underlining the importance of forming simulation for CoFRP product development processes. For an integrated development of industrial composite components, efficient forming simulation methods are in high demand. Application-oriented method development is particularly crucial for industrial needs, where large and complex multi-layer components are manufactured, commercial FE software is used, and yet high prediction accuracy is required. To meet industrial demands, this contribution gives an insight in macroscopic forming simulation approaches that utilize the FE software Abaqus in combination with user-defined material models and finite elements. Three CoFRP forming technologies are considered, which are in industrial focus due to their suitability for mass production: textile forming of dry unidirectional non-crimp fabrics (UD-NCF), thermoforming of pre-impregnated UD tapes and wet compression moulding (WCM). In addition to the highly anisotropic, large-strain material behaviour that composite forming processes have in common, the three process technologies face various process-specific modelling challenges. UD-NCFs require material models that capture the deformation behaviour and the slippage of the stitching. Thermoforming of UD tapes is highly rate- and temperature-dependent, calling for rheological membrane and bending modelling. Moreover, a thermomechanical approach including crystallisation kinetics enables the prediction of potential phase-transition during forming and resulting defects in the semi-crystalline thermoplastic matrix. For simultaneous forming and infiltration in wet compression moulding, a finite Darcy-Progression-Element is superimposed with the membrane and shell elements for forming simulation, capturing infiltration-dependent material properties. The three outlined technologies illustrate the complexity and importance of further simulation method development to support future process development