Hasil untuk "Bibliography"

Andrea Cipriani, Francesco Fucito, Carlo Heissenberg et al.

We study perturbations induced by a light particle scattering off a Schwarzschild black hole. Exploiting recent results for the wave propagation in this geometry, we derive the fields that this process induces on the horizon to leading order in the post-Minkowskian (PM) regime, when the light probe is far from the black hole. We then use these results to calculate the fluxes of energy and angular momentum that enter the black hole. We consider the effects due to gravitational, electromagnetic and scalar radiation, finding agreement with recent computations of the absorbed energy, while the absorbed angular momentum provides a new PM result.

M. Kool, J. V. Rennemo

Motivated by super-Yang-Mills theory on a Calabi-Yau 4-fold, Nekrasov and Piazzalunga have assigned weights to $r$-tuples of solid partitions and conjectured a formula for their weighted generating function. We define $K$-theoretic virtual invariants of Quot schemes of 0-dimensional quotients of $\mathcal{O}_{\mathbb{C}^4}^{\oplus r}$ by realizing them as zero loci of isotropic sections of orthogonal bundles on non-commutative Quot schemes. Via the Oh-Thomas localization formula, we recover Nekrasov-Piazzalunga's weights and derive their sign rule. Our proof passes through refining the $K$-theoretic invariants to sheaves and describing them via Clifford modules, which lets us show that they arise from a factorizable sequence of sheaves in the sense of Okounkov. Taking limits of the equivariant parameters, we then deduce the Nekrasov-Piazzalunga conjecture from its 3-dimensional analog.

Andrew Brown, Muhammad Roman, Barry Devereux

This systematic review of the research literature on retrieval-augmented generation (RAG) provides a focused analysis of the most highly cited studies published between 2020 and May 2025. A total of 128 articles met our inclusion criteria. The records were retrieved from ACM Digital Library, IEEE Xplore, Scopus, ScienceDirect, and the Digital Bibliography and Library Project (DBLP). RAG couples a neural retriever with a generative language model, grounding output in up-to-date, non-parametric memory while retaining the semantic generalisation stored in model weights. Guided by the PRISMA 2020 framework, we (i) specify explicit inclusion and exclusion criteria based on citation count and research questions, (ii) catalogue datasets, architectures, and evaluation practices, and (iii) synthesise empirical evidence on the effectiveness and limitations of RAG. To mitigate citation-lag bias, we applied a lower citation-count threshold to papers published in 2025 so that emerging breakthroughs with naturally fewer citations were still captured. This review clarifies the current research landscape, highlights methodological gaps, and charts priority directions for future research.

Markus Dierigl, Michelangelo Tartaglia

In this work we study the cancellation of non-perturbative anomalies of gravitational theories with gauge group $\mathbb{Z}_k$ in six dimensions. These subtle anomalies require a classification of deformation classes of manifolds with discrete gauge bundles known as bordism groups. The consistency of the theory demands a cancellation of the fermion anomalies, which can be done by the transformation properties of 2-form fields in the theory. Since the 2-forms in six dimensions are themselves chiral, their formulation needs subtle topological information encoded in a so-called quadratic refinement. A matching between the fermionic anomalies and the defining properties of the quadratic refinement, lead to strong consistency constraints on the charged fermion spectrum. We explicitly determine these consistency conditions for the case of a single chiral 2-form and various discrete gauge groups. Since we provide a model-independent formulation, these restrictions hold universally for theories of this type.

Zarullo Rakhmonov

For a nonprincipal character $χ$ modulo $D$, when $x\ge D^{\frac56+\varepsilon}$, $(l,D) = 1$, we prove a nontrivial estimate of the form $\sum_{n\le x}Λ(n)χ(n-l)\ll x\exp\left(-0.6\sqrt{\ln D}\right)$ for the sum of values of $χ$ over a sequence of shifted primes. Bibliography: 41 references.

Emili Salvador, Rosana Rodriguez, Enrique Miranda

Modeling in an emerging technology like RRAM devices is one of the pivotal concerns for its development. In the current bibliography, most of the models face difficulties in implementing or simulating unconventional scenarios, particularly when dealing with complex input signals. In addition, circuit simulators like Spice require long running times for high-resolution results because of their internal mathematical implementation. In this work, a fast, simple, robust, and versatile model for RRAM devices built in MATLAB is presented. The proposed model is a recursive and discretized version of the dynamic memdiode model (DMM) for bipolar-type resistive switching devices originally implemented in LTspice. The DMM model basically consists of two coupled equations: one for the current (non-linear current generator) and a second one for the memory state of the device (time-dependent differential equation). This work presents an easy-to-use tool for researchers to reproduce the experimental behavior of their devices and predict the outcome from non-trivial experiments. Three study cases are reported, aimed at capturing different phenomenologies: a frequency effect study, a cycle-to-cycle variability fit, and a stochastic resonance impact analysis.

Rebekah Willson, Owen Stewart-Robertson, Heidi Julien et al.

Introduction. Universities rely increasingly on contract academic staff for teaching and research activities; yet, working in precarious conditions, these staff face significant challenges in finding relevant workplace information, in engaging with colleagues, and in building their careers. This study examines contract academic staff perceptions of precarity and workplace marginalisation, focusing on the implications of situational and environmental influences on their information practices. Method. In-depth, semi-structured interviews with 34 contract academic staff, working in various disciplines across Canadian universities, were conducted to examine their information practices. Analysis. Interview data were analysed using reflexive thematic analysis, drawing on everyday life information seeking and information marginalisation theories. Results. Results of the study show that 1) contract academic staff conduct their work within isolated information environments; 2) this isolation leads these staff to develop highly individualised information practices; and 3) the information activities of contract academic staff are often immobilised, due to the precarious contexts that shape their work and personal lives. Conclusion. Precarious employment and information marginalisation are deeply entwined for contract academic staff. This results in frustration, disappointment, and uncertainty with their work and personal circumstances. Institutional challenges can seem intractable, particularly where task-related information provision (when available) cannot address systemic concerns.

Alex May

Does gravity constrain computation? We study this question using the AdS/CFT correspondence, where computation in the presence of gravity can be related to non-gravitational physics in the boundary theory. In AdS/CFT, computations which happen locally in the bulk are implemented in a particular non-local form in the boundary, which in general requires distributed entanglement. In more detail, we recall that for a large class of bulk subregions the area of a surface called the ridge is equal to the mutual information available in the boundary to perform the computation non-locally. We then argue the complexity of the local operation controls the amount of entanglement needed to implement it non-locally, and in particular complexity and entanglement cost are related by a polynomial. If this relationship holds, gravity constrains the complexity of operations within these regions to be polynomial in the area of the ridge.

Flash Sheridan

A simple technique is presented for testing a C99 compiler, by comparison of its output with output from preexisting tools. The advantage to this approach is that new test cases can be added in bulk from existing sources, reducing the need for in-depth investigation of correctness issues, and for creating new test code by hand. This technique was used in testing the PalmSource Palm OS Cobalt ARM C/C++ cross-compiler for Palm-Powered personal digital assistants, primarily for standards-compliance and correct execution of generated code. The technique described here found several hundred bugs, mostly in our in-house code, but also in longstanding high-quality front- and back-end code from Edison Design Group and Apogee Software. It also found eighteen bugs in the GNU C compiler, as well as a bug specific to the Apple version of GCC, a bug specific to the Suse version of GCC, and a dozen bugs in versions of GCC for the ARM processor, several of them critical.

Marco Antonio Peña-Chavez, Jorge Antonio Zacatecas Ibañez, Jorge Saenz-Mata et al.

The main objective of this study was to evaluate the antioxidant capacity and possible toxicological potential of the infusions prepared from Ibervillea sonorae. For this, infusions were prepared from the root of I. sonorae, using the skin or the pulp. The antioxidant capacity of the infusions was evaluated through the ABTS and DPPH tests. While, the Artemia salina model, the MTT test using Vero and MCF-7 cells, and the Ames test were used to evaluate the possible toxicological potential. The results showed that I. sonorae peels were more lethal (60-80%) than pulp (<50%). Interestingly, I. sonorae pulp showed greater toxicity on Vero cells (IC50 = 222 µg / mL) than infusions made using the skins (IC50 = 379 µg / mL). Infusions of I. sonorae, either in the form of peel or pulp, showed high mutagenicity at 1000 and 500 µg/mL. The ingestion of infusions prepared from the I. sonorae plant could cause serious damage to health. DOI: https://doi.org/10.54167/tecnociencia.v16i2.903

Danielle Pollock, An Yan, Michelle Parker et al.

Open science data benefit society by facilitating convergence across domains that are examining the same scientific problem. While cross-disciplinary data sharing and reuse is essential to the research done by convergent communities, so far little is known about the role data play in how these communities interact. An understanding of the role of data in these collaborations can help us identify and meet the needs of emerging research communities which may predict the next challenges faced by science. This paper represents an exploratory study of one emerging community, the environmental health community, examining how environmental health research groups form, collaborate, and share data. Five key insights about the role of data in emerging research communities are identified and suggestions are made for further research.

Gareth A. Jones, Alexander K. Zvonkin

We reinterpret ideas in Klein's paper on transformations of degree $11$ from the modern point of view of dessins d'enfants, and extend his results by considering dessins of type $(3,2,p)$ and degree $p$ or $p+1$, where $p$ is prime. In many cases we determine the passports and monodromy groups of these dessins, and in a few small cases we give drawings which are topologically (or, in certain examples, even geometrically) correct. We use the Bateman-Horn Conjecture and extensive computer searches to support a conjecture that there are infinitely many primes of the form $p=(q^n-1)/(q-1)$ for some prime power $q$, in which case infinitely many groups ${\rm PSL}_n(q)$ arise as permutation groups and monodromy groups of degree $p$ (an open problem in group theory).

Luis-Fernando Ramos-Simón, Ignacio Miró-Charbonnier

La gestión de los fonogramas en las instituciones de patrimonio plantea un sinfín de dificultades, sobre todo desde la perspectiva de los derechos de los titulares de las obras. El estudio describe un proceso de gestión documental, representado mediante diagramas de flujo, que está dirigido a resolver las principales dificultades a las que se enfrentan los gestores al momento de divulgar colecciones de fonogramas. En cuanto a la situación de los posibles titulares de derechos sobre los fonogramas, se analizan sucesivamente: a) los diferentes tipos de derechos sobre los documentos sonoros; b) la duración de la protección de los derechos de los autores; c) la duración de los derechos conexos; y d) algunos problemas específicos de la gestión de derechos de autor en las instituciones de patrimonio. En conjunto, el estudio ofrece una herramienta para dar respuesta a la mayoría de los problemas que puede plantear en este entorno la difusión de los fonogramas, y demuestra las ventajas de disponer de una política de derechos de autor en las instituciones, tanto para la gestión interna de sus colecciones de fonogramas como para la difusión de éstas en la sociedad actual.

Luca Cosmo, Antonio Norelli, Oshri Halimi et al.

In this paper, we advocate the adoption of metric preservation as a powerful prior for learning latent representations of deformable 3D shapes. Key to our construction is the introduction of a geometric distortion criterion, defined directly on the decoded shapes, translating the preservation of the metric on the decoding to the formation of linear paths in the underlying latent space. Our rationale lies in the observation that training samples alone are often insufficient to endow generative models with high fidelity, motivating the need for large training datasets. In contrast, metric preservation provides a rigorous way to control the amount of geometric distortion incurring in the construction of the latent space, leading in turn to synthetic samples of higher quality. We further demonstrate, for the first time, the adoption of differentiable intrinsic distances in the backpropagation of a geodesic loss. Our geometric priors are particularly relevant in the presence of scarce training data, where learning any meaningful latent structure can be especially challenging. The effectiveness and potential of our generative model is showcased in applications of style transfer, content generation, and shape completion.

د. عبد الله حمود مویهان

In this study, the researcher aims at identifying Strategic Planning inInformation Institutions in the State of Kuwait through conducting a questionnairefor this purpose. This questionnaire clarified the status of Strategic Planning inInformation Institutions in the State of Kuwait. Research population consisted ofemployees of libraries in Kuwait University (98) employees (males - females).The results showed that a percentage of 44.9 % of individuals see that thestrategic planning achieves the objectives of Information Institution and achievesthe library message. The researcher recommended that the InformationInstitutions in the State of Kuwait should determine the purposes of strategicplanning and correlate them to the purposes of Information Institution, alteringfrom the performance form to new performance form and involve all the institutionstaff in the planning process.Results1- Clarity of the concept of strategic planning for employees andcoaches in information institutions at Kuwait University.2- (20.4%) of the respondents believe that strategic planning is amethod for making crucial decisions within the library.3- A percentage (44.9%) of the respondents believe that strategicplanning achieves the goals of the information institution.4- It turns out that (55.1%) of the sample members support that there isto provide capabilities in university libraries and equipment toimplement strategic planning commensurate with the organizationalstructure.5- Library buildings at Kuwait University are appropriate in terms of areaand capabilities for implementing strategic planning.6- He sees (53.1%) of the study sample view that a senior managementbelieves in strategic planning and sees the readiness of theinformation institution in terms of all material and human resources.7- It is clear to us that the percentage (46.9%) of the communitymembers believe that those who carry out strategic planning within  the information institution are the efforts of the work teams, as thesenior management supports the work teams.8- Community members confirm that the study percentage (63.3%)indicates that the requirements for strategic planning requireparticipatory work within the information institution.9- (40.8%) believe that one of the benefits of strategic planning withinthe information institution is that it leads to improvement anddevelopment of workers' performance and works to rationalize thecorrect course during work.

Sérgio José de Sousa, Thiago Magela Rodrigues Dias, Adilson Luiz Pinto

Com o crescente volume de dados e usuários de sistemas de currículos, a dificuldade de encontrar especialistas é cada vez maior. Neste trabalho é proposto metodologia de extração de dados abertos dos currículos da Plataforma Lattes, um tratamento para esses dados e investiga uma abordagem de Agente de Recomendação baseado em redes neurais profundas com autoencoder.

Nishant Chandgotia, Benjamin Weiss

A set $P\subset \mathbb N$ is called predictive if for any zero entropy finite-valued stationary process $(X_i)_{i\in \mathbb Z}$, $X_0$ is measurable with respect to $(X_i)_{i\in P}$. We know that $\mathbb N$ is a predictive set. In this paper we give sufficient conditions and necessary ones for a set to be predictive. We also discuss linear predictivity, predictivity among Gaussian processes and relate these to Riesz sets which arise in harmonic analysis.

Mohammad Fathian, Hossein Sharifi, Faranaksadat Solat

This study examines how gamification mechanics could be used in online retailers' loyalty programs. In other words, this article attempts to create a conceptual model for the relationship between gamification mechanics and customer loyalty elements. We used a field study to conduct our research. In order to validate the survey, 450 customers from one of the greatest online stores in Iran were questioned. The results of this survey were used to validate our 11 phrases on the relationship between gamification mechanics and customer loyalty. The results were analyzed using confirmatory factor analysis, path analysis, and model fitness tests in structural equations modeled in the Lisrel software. According to the research findings, the relationship between variables and the proposed conceptual model was confirmed. Based on the performed analysis, all 11 phrases were verified<strong>.</strong>

Thiago de Oliveira Vieira, Paola Rodrigues Bittencourt

This article analyzes how records management was addressed in articles published in the first twenty-first years of The American Archivist. The journal, edited by the Society of American Archivists, was created in the same period of records management appearance, and has published reflections by National Archives staff on issues and challenges related to the management of public records. Thus, this article aims to understand, from the method of content analysis, how records management was portrayed by the articles published in The American Archivist, in the period 1938-1959, from the first texts published in this journal, which had its first publication in 1938. In addition to the content analysis, a contextual analysis of this publication is proposed, as well as a brief discussion about its contents categorized according to the method used, in the light of the articles selected for this research.

Gavin Rens, Abhaya Nayak, Thomas Meyer

Many multi-agent systems (MASs) are situated in stochastic environments. Some such systems that are based on the partially observable Markov decision process (POMDP) do not take the benevolence of other agents for granted. We propose a new POMDP-based framework which is general enough for the specification of a variety of stochastic MAS domains involving the impact of agents on each other's reputations. A unique feature of this framework is that actions are specified as either undirected (regular) or directed (towards a particular agent), and a new directed transition function is provided for modeling the effects of reputation in interactions. Assuming that an agent must maintain a good enough reputation to survive in the network, a planning algorithm is developed for an agent to select optimal actions in stochastic MASs. Preliminary evaluation is provided via an example specification and by determining the algorithm's complexity.