Quantum Spectral Curve for AdS3/CFT2: a proposal

We conjecture the Quantum Spectral Curve equations for string theory on AdS3× S3× T4 with RR charge and its CFT2 dual. We show that in the large-length regime, under additional mild assumptions, the QSC reproduces the Asymptotic Bethe Ansatz equations for the massive sector of the theory, including the exact dressing phases found in the literature. The structure of the QSC shares many similarities with the previously known AdS5 and AdS4 cases, but contains a critical new feature — the branch cuts are no longer quadratic. Nevertheless, we show that much of the QSC analysis can be suitably generalised producing a self-consistent system of equations. While further tests are necessary, particularly outside the massive sector, the simplicity and self-consistency of our construction suggests the completeness of the QSC.

Importance measure-based maintenance strategy considering maintenance costs

Maintenance is an important way to ensure the best performance of repairable systems. This paper considers how to reduce system maintenance cost while ensuring consistent system performance. Due to budget constraints, preventive maintenance (PM) can be done on only some of the system components. Also, different selections of components to be maintained can have markedly different effects on system performance. On the basis of the above issues, this paper proposes an importance-based maintenance priority (IBMP) model to guide the selection of PM components. Then the model is extended to find the degree of correlation between two components to be maintained and a joint importance-based maintenance priority (JIBMP) model to guide the selection of opportunistic maintenance (OM) components is proposed. Also, optimization strategies under various conditions are proposed. Finally, a case of 2H2E architecture is used to demonstrate the proposed method. The results show that generators in the 2E layout have the highest maintenance priority, which further explains the difference in the importance of each component in PM.

Theatrical and Non-Theatrical Thinking in Actual Choreographic Practice

The article attempts to concretize the essence of the two aesthetically polar staging approaches — theatrical and non-theatrical (performative) — in the context of the choreographic art development. The author suggests that the basis for separating these approaches can be some peculiarities in the ways they interpret such fundamental concepts as “actor”, “role”, “spectator”, “drama”, “action”, “conflict”, which, in a choreographic performance, are in certain relationships determined by cultural traditions, and in a non-theatrical production, they are transformed up to their disappearance. A similar experience of separating a theater and a non-theater on the basis of the presence of an actor, a role, a spectator and an hierarchy between them is proposed in theater studies. However, in choreographic (including ballet) performances, the content of the role is closely linked with the music and is often determined by the emotional background and musical dramaturgy. In the case of a radical departure from the composer’s intention, turning to a different starting point for the composition, the specificity of the choreographic (ballet) performance is destroyed. Borrowings from non-theatrical art are showed in the construction of meanings when working with intrinsic body movement, as well as in the reliance on interdisciplinarity. Within a single line of choreographic art, there is a whole spectrum of ideas that interpret the concepts of “theatricality”, “non-theatricality”, “drama”, and “performativity” in different ways. On what basis to classify them in order to reduce them to a consistent system is a difficult question. The article attempts to outline the foundation for future classification. The relevance of this topic is caused by the insufficient elaboration of the conceptual base in the specialized literature on choreographic art.

Improving Data Quality and Data Governance Using Master Data Management: A Review

Master data management (MDM) is a method of maintaining, integrating, and harmonizing master data to ensure consistent system information. The primary function of MDM is to control master data to keep it consistent, accurate, current, relevant, and contextual to meet different business needs across applications and divisions. MDM also affects data governance, which is related to establishing organizational actors’ roles, functions, and responsibilities in maintaining data quality. Poor management of master data can lead to inaccurate and incomplete data, leading to lousy stakeholder decision-making. This article is a literature review that aims to determine how MDM improves the data quality and data governance and assess the success of MDM implementation. The review results show that MDM can overcome data quality problems through the MDM process caused by data originating from various scattered sources. MDM encourages organizations to improve data management by adjusting the roles and responsibilities of business actors and information technology (IT) staff documented through data governance. Assessment of the success of MDM implementation can be carried out by organizations to improve data quality and data governance by following the existing framework.

Some research on the genus Camellia l. (Theaceae) with representatives in Vietnam

Many studies have been conducted to classify the genus Camellia, yet they have not been entirely consistent. Therefore, doing research on some of the taxonomic systems of the genus Camellia will serve as the basis for the classification and arrangement of recently discovered species into a consistent system. A series of studies based on morphology as well as molecular biology techniques, the classification of pollen spores, and the analysis of leaf anatomy were examined. The systems based on morphological characteristics were inherited and widely recognized, thereby becoming an appropriate method to classify the genus Camellia with representatives in Vietnam.

Methodological Notes on Modelling Reconstructions After Literary Architecture

The manifold relationships between text and image are investigated by analysing attempts at a three-dimensional reconstruction of the Palace of Love and Venus described in Giovan Battista Marino’s Adonis. From text analysis and iconographical precedents to free-hand sketching and three-dimensional modelling, the article describes the progressive translation of some verses of the poem into a consistent system of drawings and models, which, besides revealing some hidden features of text, addresses the implicit limits of the ineffable quality of Marino’s literary space.

Russian Silver Age Philosophy of War: Main Features

The article discusses the main features of the Russian philosophy of war that developed in the first third of the 20th century. The author shows that in Russia, the philosophy of war did not develop as a separate broad line of research but limited itself to only a few meaningful, but rather brief, experiments. Nevertheless, many Russian philosophers (Fyodor Dostoevsky, Vladimir Soloviev, Evgenii Troubetzkoy, Ivan Ilyin, Nikolai Berdyaev, Lev Karsavin and others) left deep, well-founded reasoning about war, which can be reconstructed as a consistent system of views. One of its features is the shift in the focus of considering armed violence from the sociological and political to the anthropological and ethical; the focus is not on war as a social phenomenon, but on the human’s position in war. In this regard, the attitude to war in Russian philosophy is paradoxical. On the one hand, war brings a lot of evil in the form of death of many people and destruction, but, on the other hand, it promotes to the manifestation of the best moral qualities in people, up to selflessness and heroism. Armed violence seems to be a tragedy of the Christian conscience, and each participant must independently find a justification for his participation in the war. Based on the conditions of a difficult moral choice, personal, existential justification may come from the idea that people cannot commit violence with a clear conscience. In this case, the person choosing to participate in a war perceives the battle as his own guilt that should be expiated.

2D thermo-mechanical-chemical coupled numerical models of interactions between a cooling magma chamber and a visco-elastic host rock

<div> <p>A recent focus of studies in geodynamic modeling and magmatic petrology is to understand the coupled behavior between deformation and magmatic processes. Here, we present a 2D numerical model of an upper crustal magma (or mush) chamber in a visco-elastic host rock, with coupled thermal, mechanical and chemical processes, accounting for thermodynamically consistent material parameters. The magma chamber is isolated from deeper sources of magma (at least periodically) and it is cooling, and thus shrinking. We quantify the changes of pressure and stress around a cooling magma chamber and a warming host rock, using a compressible visco-elastic formulation, considering both simplified idealized and more complex and realistic geometries of the magma chamber.</p> </div><div> <p>We present solutions based on a self-consistent system of the conservation equations for coupled thermo-mechanical-chemical processes, under the assumptions of slow (negligible inertial forces), visco-elastic deformation and constant chemical bulk composition. The thermodynamic melting/crystallization model is based on a pelitic melting model calculated with Perple_X, assuming a granitic composition and is incorporated as a look-up table. We will discuss the numerical implementation, show the results of systematic numerical simulations, and illustrate the effect of volume changes due to temperature changes (including the possibility melting and crystallization) on stress and pressure evolution in magmatic systems.</p> </div>

Formation of a Comprehensive Model of the Risk Management System of a Coal Mining Enterprise

In the conditions of market competition, the ability of companies to timely identify risks in the conduct of business activities and find adequate ways to eliminate them is one of the advantages and allows you to maintain a high position in any industry. This option is maintained under the condition that the risk management system is built based on the real needs of the business in maintaining a competitive position in the conditions of high uncertainty of the external and internal environment.The article reveals an approach based on the integrated model of the risk management system, provides a scheme and description of the integrated model, as well as methodologies used for assessing and ranking risks. The presented approach allows for comprehensive risk management at all levels, monitoring and timely implementation of risk management measures. The relevance of the presented approach is also due to the need to combine the requirements of different international standards for management systems in terms of risk management into a single consistent system.

Effektiver Schutz nationaler Minderheiten durch den Europäischen Gerichtshof für Menschenrechte?

Now that a consistent system of regional minority protection has been established through the FCNM and the case law of the ECtHR, the question arises as to its effectiveness, to what extent the standard of the ECtHR corresponds to the level of the minority-specific draft of an additional protocol to the ECHR and whether there is still a need for such an additional protocol today. Therefore, this work is based on an articlecentred approach, which focuses on developments and critically examines individual judgments. A comparison of the draft additional protocol and the ECHR / FCNM serves to identify possible gaps in protection. The paper concludes with a statement on the feasibility of an additional protocol.