A non-symmetric Yang-Baxter Algebra for the Quantum Nonlinear Schr\"odinger Model

We study certain non-symmetric wavefunctions associated to the quantum nonlinear Schr\"odinger model, introduced by Komori and Hikami using Gutkin's propagation operator, which involves representations of the degenerate affine Hecke algebra. We highlight how these functions can be generated using a vertex-type operator formalism similar to the recursion defining the symmetric (Bethe) wavefunction in the quantum inverse scattering method. Furthermore, some of the commutation relations encoded in the Yang-Baxter equation for the relevant monodromy matrix are generalized to the non-symmetric case.Comment: 31 pages; added some references; minor corrections throughou

A Structured Approach for Design of an SST Control Architecture Based on CAFCR Framework

Solid-State Transformers (SSTs) are a promising alternative to conventional oil-cooled copper-and-iron based power transformers in the electricity grid. They offer opportunities to make secondary (MV/LV) substations flexible, intelligent and modular. This work proposes to use a generic design tool from Systems Engineering - the CAFCR framework - for the SST control system to unlock its full potential. The framework provides a structured and thorough approach for collaboration and design, connecting what is desired with what is possible. The advantages are as follows: 1) Many research on SSTs has already been done and the framework can help to collect and aggregate the performed research; 2) It also helps to ensure important aspects are not overlooked and designs meet the necessary requirements; 3) Furthermore, it can identify new areas of research and facilitate new ideas. In the paper, we apply the CAFCR framework to SST by starting with the perspective of the Distribution System Operator (DSO) as the customer and an exploration of the application surroundings (substation housing, grid embedding). We then continue to examine the functionalities that are required and desired for an SST from a black-box perspective. These functionalities are presented in a table where the functionalities are divided into a) ‘additional features’ vs ‘mimicking a regular transformer’, and b) ‘normal operation’ vs. ‘fault conditions’. Based on this, four areas of research have been indicated to obtain a flexible, future-proof control architecture. To see how these areas could work together, a task division is proposed as well as applying distributed control to the MV side

On the role of dauer in the adaptation of nematodes to a parasitic lifestyle

Abstract Nematodes are presumably the most abundant Metazoa on Earth, and can even be found in some of the most hostile environments of our planet. Various types of hypobiosis evolved to adapt their life cycles to such harsh environmental conditions. The five most distal major clades of the phylum Nematoda (Clades 8–12), formerly referred to as the Secernentea, contain many economically relevant parasitic nematodes. In this group, a special type of hypobiosis, dauer, has evolved. The dauer signalling pathway, which culminates in the biosynthesis of dafachronic acid (DA), is intensively studied in the free-living nematode Caenorhabditis elegans, and it has been hypothesized that the dauer stage may have been a prerequisite for the evolution of a wide range of parasitic lifestyles among other nematode species. Biosynthesis of DA is not specific for hypobiosis, but if it results in exit of the hypobiotic state, it is one of the main criteria to define certain behaviour as dauer. Within Clades 9 and 10, the involvement of DA has been validated experimentally, and dauer is therefore generally accepted to occur in those clades. However, for other clades, such as Clade 12, this has hardly been explored. In this review, we provide clarity on the nomenclature associated with hypobiosis and dauer across different nematological subfields. We discuss evidence for dauer-like stages in Clades 8 to 12 and support this with a meta-analysis of available genomic data. Furthermore, we discuss indications for a simplified dauer signalling pathway in parasitic nematodes. Finally, we zoom in on the host cues that induce exit from the hypobiotic stage and introduce two hypotheses on how these signals might feed into the dauer signalling pathway for plant-parasitic nematodes. With this work, we contribute to the deeper understanding of the molecular mechanisms underlying hypobiosis in parasitic nematodes. Based on this, novel strategies for the control of parasitic nematodes can be developed

Right ventricular hematoma:A rare but potentially fatal complication of percutaneous coronary artery intervention

Right ventricular hematoma secondary to coronary artery perforation during the percutaneous coronary intervention (PCI) is a rare complication. Nevertheless, with the growth of complex PCIs, including chronic total occlusion procedures, this complication may increase in frequency. We describe three cases of subepicardial right ventricular hematoma after complex right coronary artery PCI with different outcomes. Two cases were successfully managed with medication only. One case was managed with medication and pericardial drainage, unfortunately with a fatal outcome. All cases emphasize the need for awareness concerning this complication, which warrants prompt diagnosis and adequate therapy

Дослідження підходів до оцінки стану конкурентоспроможності підприємств

Мета статті – наведення підходів до оцінки стану конкурентоспроможності підприємств