Tame and wild theorem for the category of filtered by standard modules for a quasi-hereditary algebra

We introduce the notion of interlaced weak ditalgebras and apply reduction procedures to their module categories to prove the tame-wild dichotomy for the category ${\cal F}(\Delta)$ of filtered by standard modules for a quasi-hereditary algebra. Moreover, in the tame case, we show that given a fixed dimension $d$, for every $d$-dimensional indecomposable module $M \in {\cal F}(\Delta)$, with the only possible exception of those lying in a finite number of isomorphism classes, the module $M$ coincides with its Auslander-Reiten translate in ${\cal F}(\Delta)$. Our results are based on a theorem by Koenig, K\"ulshammer, and Ovsienko relating ${\cal F}(\Delta)$ with the module category of some special type of ditalgebra.Comment: 51 page

Time-dependent Photoionization of Gaseous Nebulae: the Pure Hydrogen Case

We study the problem of time-dependent photoionization of low density gaseous nebulae subjected to sudden changes in the intensity of ionizing radiation. To this end, we write a computer code that solves the full time-dependent energy balance, ionization balance, and radiation transfer equations in a self-consistent fashion for a simplified pure hydrogen case. It is shown that changes in the ionizing radiation yield ionization/thermal fronts that propagate through the cloud, but the propagation times and response times to such fronts vary widely and non-linearly from the illuminated face of the cloud to the ionization front (IF). Ionization/thermal fronts are often supersonic, and in slabs initially in pressure equilibrium such fronts yield large pressure imbalances that are likely to produce important dynamical effects in the cloud. Further, we studied the case of periodic variations in the ionizing flux. It is found that the physical conditions of the plasma have complex behaviors that differ from any steady-state solutions. Moreover, even the time average ionization and temperature is different from any steady-state case. This time average is characterized by over-ionization and a broader IF with respect to the steady-state solution for a mean value of the radiation flux. Around the time average of physical conditions there is large dispersion in instantaneous conditions, particularly across the IF, which increases with the period of radiation flux variations. Moreover, the variations in physical conditions are asynchronous along the slab due to the combination of non-linear propagation times for thermal/ionization fronts and equilibration times.Comment: Accepted for publication in ApJ. 36 pages, 12 figure

The Never-Ending Quest for Clarity Amidst Uncertainty: Hospital M&A and Antitrust Scrutiny

Although critics say hospitals justify mergers in the same way as they did during the M&A boom of the 1990s, these critics frequently link the current wave of mergers with the purpose of becoming more integrated and efficient to achieve the level of cost savings and improved quality that the United States and patients currently require. However, the results from hospital consolidation remain uncertain because of the limited and mixed evidence about its impact on quality of care and price. Part I of this Article discusses the recent surge in hospital M&A activity. Part II brings some clarity by discussing the most frequently cited justification to this current wave of mergers—the Affordable Care Act (ACA). Concurrently, with the uncertainty surrounding the ever-changing healthcare landscape and the rising number of hospital transactions, the Federal Trade Commission (FTC) and Department of Justice (DOJ) (collectively, the Agencies) apply an increased level of scrutiny on modern healthcare transactions. While both public and private forces fuel the drive toward hospital consolidation, the Agencies enforce a myriad of roadblocks to hospital mergers. Although hospital executives and the Agencies alike direct their actions towards the broad goal of improving health care, their independent actions are dissimilar and have uncertain results. Beyond the uncertainty caused by the ACA and the dynamic healthcare industry, Part III focuses on antitrust law and its framework as applied to previous hospital mergers, illustrating how courts add more confusion to an already uncertain field by applying unclear antitrust laws. Part IV attempts to bring some clarity by shedding light on the court’s most recent analysis of a hospital merger. Instead of applying the per se or “Rule of Reason” approach, this Article proposes that, in theory, courts now slide along the analytical continuum by using a quick look approach to scrutinize hospital mergers, which increases the amount of uncertainty and lack of clarity surrounding hospital M&A

Partial coherent states in graphene

Producción CientíficaWe employ a symmetric gauge to describe the interaction of electrons in graphene with a magnetic field which is orthogonal to the layer surface and to build the so-called partial and bidimensional coherent states for this system in the Barut-Girardello sense. We also evaluate the corresponding probability and current densities as well as the mean energy value.Junta de Castilla y León (projects VA137G18 and BU229P18)Ministerio de Economía, Industria y Competitividad (project MTM2014-57129-C2-1-P

ADVANCING INTEROPERABILITY IN GEOGRAPHICALLY DISTRIBUTED SIMULATIONS: A NOVEL APPROACH USING CLOUD COMPUTING

This research investigates integrating the Distributed Interactive Simulation (DIS) protocol with modern cloud computing technologies to enhance interoperability and performance in geographically distributed simulations using the internet. The study employs the Microsoft Orleans framework, an open-source implementation of the actor model, to develop a prototype for managing DIS protocol data units (PDUs). Tested in a realistic distributed setting, the solution’s scalability and performance were evaluated against the IEEE Standard for DIS—Communication Services and Profiles (IEEE 1278.2-2015). The latency of the PDU messages was compared to quality-of-service benchmarks. Initial tests with varying numbers of units showed adequate performance. The proposed solution successfully handled increased simulation complexity and network load produced by running an exercise that included fire exchanges between two antagonistic forces. While the solution did not consistently meet the 300-millisecond latency threshold established by the standard and the number of participant units was relatively small (less than three per side), it demonstrated the viability of such endeavors. Further optimization and architectural changes, such as workload distribution and leveraging Azure’s advanced features, are recommended. The findings suggest that cloud computing technologies could potentially enable more efficient and scalable distributed simulations.Distribution Statement A. Approved for public release: Distribution is unlimited.Teniente de Navio, Mexican Nav

Maximizing Societal Contributions of Latino Adults by Investing in Latino Children's Health Care

Focuses on the lack of preventive care and health insurance coverage for Latino children, and how this affects their health and school performance and impacts their ability to contribute as adults to California's economy and society

Research assessment under debate: disentangling the interest around the DORA declaration on Twitter

Much debate has been around the misapplication of metrics in research assessment. As a result of this concern, the Declaration on Research Assessment (DORA) was launched, an initiative that caused opposing viewpoints. However, the discussion topics about DORA have not been formally identified, especially in participatory environments outside the scholarly communication process, such as social networks. This paper contributes to that end by analyzing 20,717 DORA-related tweets published from 2015 to 2022. The results show an increasing volume of tweets, mainly promotional and informative, but with limited participation of users, either commenting or engaging with the tweets, generating a scarcely polarized conversation driven primarily by a few DORA promoters. While a varied list of discussion topics is found (especially "Open science and research assessment," "Academics career assessment & innovation," and "Journal Impact Factor"), the DORA debate appears as part of broader conversations (research evaluation, open science). Further studies are needed to check whether these results are restricted to Twitter or reveal more general patterns. The findings might interest the different evaluators and evaluated agents regarding their interests and concerns around the reforms in the research evaluation