Hasil untuk "History of the Greco-Roman World"

Hanti Lin

The integration of the history and philosophy of statistics was initiated at least by Hacking (1975) and advanced by Hacking (1990), Mayo (1996), and Zabell (2005), but it has not received sustained follow-up. Yet such integration is more urgent than ever, as the recent success of artificial intelligence has been driven largely by machine learning -- a field historically developed alongside statistics. Today, the boundary between statistics and machine learning is increasingly blurred. What we now need is integration, twice over: of history and philosophy, and of two fields they engage -- statistics and machine learning. I present a case study of a philosophical idea in machine learning (and in formal epistemology) whose root can be traced back to an often under-appreciated insight in Neyman and Pearson's 1936 work (a follow-up to their 1933 classic). This leads to the articulation of an epistemological principle -- largely implicit in, but shared by, the practices of frequentist statistics and machine learning -- which I call achievabilism: the thesis that the correct standard for assessing non-deductive inference methods should not be fixed, but should instead be sensitive to what is achievable in specific problem contexts. Another integration also emerges at the level of methodology, combining two ends of the philosophy of science spectrum: history and philosophy of science on the one hand, and formal epistemology on the other hand.

Hagit Attiya, Michael A. Bender, Martín Farach-Colton et al.

A history-independent data structure does not reveal the history of operations applied to it, only its current logical state, even if its internal state is examined. This paper studies history-independent concurrent dictionaries, in particular, hash tables, and establishes inherent bounds on their space requirements. This paper shows that there is a lock-free history-independent concurrent hash table, in which each memory cell stores two elements and two bits, based on Robin Hood hashing. Our implementation is linearizable, and uses the shared memory primitive LL/SC. The expected amortized step complexity of the hash table is $O(c)$, where $c$ is an upper bound on the number of concurrent operations that access the same element, assuming the hash table is not overpopulated. We complement this positive result by showing that even if we have only two concurrent processes, no history-independent concurrent dictionary that supports sets of any size, with wait-free membership queries and obstruction-free insertions and deletions, can store only two elements of the set and a constant number of bits in each memory cell. This holds even if the step complexity of operations on the dictionary is unbounded.

Tao Liu, Chongyu Wang, Rongjie Li et al.

While Multimodal Large Language Models (MLLMs) have advanced GUI navigation agents, current approaches face limitations in cross-domain generalization and effective history utilization. We present a reasoning-enhanced framework that systematically integrates structured reasoning, action prediction, and history summarization. The structured reasoning component generates coherent Chain-of-Thought analyses combining progress estimation and decision reasoning, which inform both immediate action predictions and compact history summaries for future steps. Based on this framework, we train a GUI agent, \textbf{GUI-Rise}, through supervised fine-tuning on pseudo-labeled trajectories and reinforcement learning with Group Relative Policy Optimization (GRPO). This framework employs specialized rewards, including a history-aware objective, directly linking summary quality to subsequent action performance. Comprehensive evaluations on standard benchmarks demonstrate state-of-the-art results under identical training data conditions, with particularly strong performance in out-of-domain scenarios. These findings validate our framework's ability to maintain robust reasoning and generalization across diverse GUI navigation tasks. Code is available at https://leon022.github.io/GUI-Rise.

Mariusz Plago

Bernard J. Carr, Anne M. Green

We overview the history of primordial black hole (PBH) research from the first papers around 50 years ago to the present epoch. The history may be divided into four periods, the dividing lines being marked by three key developments: inflation on the theoretical front and the detection of microlensing events by the MACHO project and gravitational waves by the LIGO/Virgo/KAGRA project on the observation front. However, they are also characterised by somewhat different focuses of research. The period 1967-1980 covered the groundbreaking work on PBH formation and evaporation. The period 1980-1996 mainly focussed on their formation, while the period 1996-2016 consolidated the work on formation but also collated the constraints on the PBH abundance. In the period 2016-2024 there was a shift of emphasis to the search for evidence for PBHs and - while opinions about the strength of the purported evidence vary - this has motivated more careful studies of some aspects of the subject. Certainly the soaring number of papers on PBHs in this last period indicates a growing interest in the topic.

Desiderio Parrilha Martínez

En su diálogo Eudemo Aristóteles desarrolla dos argumentos contra la teoría del “alma armonía” como ampliación de la crítica heredada de Platón. El primero de ellos no aparece en el Fedón ni vuelve a aparecer entre los argumentos que Aristóteles emplea posteriormente en De anima. Esta singularidad argumental viene acompañada por la dificultad interpretativa que ofrece el texto, puesta de manifiesto por la crítica contemporánea. Nuestro artículo pretende mostrar que este argumento original del período de juventud se basa en las “privaciones parciales o defectivas” de las obras de madurez, dentro del contexto de las “privaciones de potencia activa”.

Emília M. Rocha de Oliveira

Xiao-Kan Guo

In this paper, we construct a tensor network representation of quantum causal histories, as a step towards directly representing states in quantum gravity via bulk tensor networks. Quantum causal histories are quantum extensions of causal sets in the sense that on each event in a causal set is assigned a Hilbert space of quantum states, and the local causal evolutions between events are modeled by completely positive and trace-preserving maps. Here we utilize the channel-state duality of completely positive and trace-preserving maps to transform the causal evolutions to bipartite entangled states. We construct the matrix product state for a single quantum causal history by projecting the obtained bipartite states onto the physical states on the events. We also construct the two dimensional tensor network states for entangled quantum causal histories in a restricted case with compatible causal orders. The possible holographic tensor networks are explored by mapping the quantum causal histories in a way analogous to the exact holographic mapping. The constructed tensor networks for quantum causal histories are exemplified by the non-unitary local time evolution moves in a quantum system on temporally varying discretizations, and these non-unitary evolution moves are shown to be necessary for defining a bulk causal structure and a quantum black hole. Finally, we comment on the limitations of the constructed tensor networks, and discuss some directions for further studies aiming at applications in quantum gravity.

Nicola Andrea Dondi, Francesco Sannino, Juri Smirnov

We study the thermodynamic history of composite Dark Matter models. We start with classifying the models by means of the symmetries partially protecting the composite Dark Matter decays and constrain their lifetimes. For each model, we determine the impact of number-changing and number-conserving operators on its thermal history. We also develop the analytic formalism to calculate the asymptotic abundance of stable relics. We show how the relative strength between number-changing and number-conserving interactions together with the dark plasma lifetime affect the thermal fate of the various composite models. Additionally, we discover that the final dark relic density of composite particles can be diluted due to an entropy increase stemming from dark plasma decay. Finally, we confront the models with experimental bounds. We find that indirect detection experiments are most promising in testing this large class of models.

Branislav Kveton, Csaba Szepesvari, Mohammad Ghavamzadeh et al.

We propose an online algorithm for cumulative regret minimization in a stochastic multi-armed bandit. The algorithm adds $O(t)$ i.i.d. pseudo-rewards to its history in round $t$ and then pulls the arm with the highest average reward in its perturbed history. Therefore, we call it perturbed-history exploration (PHE). The pseudo-rewards are carefully designed to offset potentially underestimated mean rewards of arms with a high probability. We derive near-optimal gap-dependent and gap-free bounds on the $n$-round regret of PHE. The key step in our analysis is a novel argument that shows that randomized Bernoulli rewards lead to optimism. Finally, we empirically evaluate PHE and show that it is competitive with state-of-the-art baselines.

Juncheng B. Li, Shuhui Qu, Xinjian Li et al.

Voice Assistants (VAs) such as Amazon Alexa or Google Assistant rely on wake-word detection to respond to people's commands, which could potentially be vulnerable to audio adversarial examples. In this work, we target our attack on the wake-word detection system, jamming the model with some inconspicuous background music to deactivate the VAs while our audio adversary is present. We implemented an emulated wake-word detection system of Amazon Alexa based on recent publications. We validated our models against the real Alexa in terms of wake-word detection accuracy. Then we computed our audio adversaries with consideration of expectation over transform and we implemented our audio adversary with a differentiable synthesizer. Next, we verified our audio adversaries digitally on hundreds of samples of utterances collected from the real world. Our experiments show that we can effectively reduce the recognition F1 score of our emulated model from 93.4% to 11.0%. Finally, we tested our audio adversary over the air, and verified it works effectively against Alexa, reducing its F1 score from 92.5% to 11.0%.; We also verified that non-adversarial music does not disable Alexa as effectively as our music at the same sound level. To the best of our knowledge, this is the first real-world adversarial attack against a commercial-grade VA wake-word detection system. Our code and demo videos can be accessed at \url{https://www.junchengbillyli.com/AdversarialMusic}

Peter Grossardt

Building on his research of 2009, the author of the following article will discuss some parallels to the wrath of Achilles in the medieval European tradition, especially in the Latin Song of Waltharius and in the French chanson de geste as exemplified most notably by the Geste de Fierabras. This epic forms the best parallel to the Iliad, but doesn’t seem to depend on it. It is therefore claimed that the opening of the Iliad with the immediate conflict between the king and his main vassal represents a traditional device of oral epic poetry. As a consequence, the established idea of a chronographic epic style, which has been replaced by the more dramatic Homeric poems, has to be abandoned. On the contrary, it were the dramatic and colourful motifs like the wrath of Achilles or the conquest of Troy with the help of the Wooden Horse, which formed the kernel of the legend, around which smaller episodes crystallized that were told in a more chronographic style.

Mathilde Cambron-Goulet, Laetitia Monteils-Laeng

Laura Lopez-Honorez, Olga Mena, Sergio Palomares-Ruiz et al.

In warm dark matter scenarios structure formation is suppressed on small scales with respect to the cold dark matter case, reducing the number of low-mass halos and the fraction of ionized gas at high redshifts and thus, delaying reionization. This has an impact on the ionization history of the Universe and measurements of the optical depth to reionization, of the evolution of the global fraction of ionized gas and of the thermal history of the intergalactic medium, can be used to set constraints on the mass of the dark matter particle. However, the suppression of the fraction of ionized medium in these scenarios can be partly compensated by varying other parameters, as the ionization efficiency or the minimum mass for which halos can host star-forming galaxies. Here we use different data sets regarding the ionization and thermal histories of the Universe and, taking into account the degeneracies from several astrophysical parameters, we obtain a lower bound on the mass of thermal warm dark matter candidates of $m_X > 1.3$ keV, or $m_s > 5.5$ keV for the case of sterile neutrinos non-resonantly produced in the early Universe, both at 90\% confidence level.

Tomo Goto, Nagiosa Oi, Ece Kilerci Eser et al.

Understanding infrared (IR) luminosity is fundamental to understanding the cosmic star formation history and AGN evolution. Japanese infrared satellite, AKARI, provided unique data sets to probe this both at low and high redshift; the AKARI all sky survey in 6 bands (9-160 $μ$m), and the AKARI NEP survey in 9 bands (2-24$μ$m). The AKARI performed all sky survey in 6 IR bands (9, 18, 65, 90, 140, and 160 $μ$m) with 3-10 times better sensitivity than IRAS, covering the crucial far-IR wavelengths across the peak of the dust emission. Combined with a better spatial resolution, we measure the total infrared luminosity ($L_{TIR}$) of individual galaxies, and thus, the total infrared luminosity density of the local Universe much more precisely than previous work. In the AKARI NEP wide field, AKARI has obtained deep images in the mid-infrared (IR), covering 5.4 deg$^2$. However, our previous work was limited to the central area of 0.25 deg$^2$ due to the lack of deep optical coverage. To rectify the situation, we used the newly advent Subaru telescope's Hyper Suprime-Cam to obtain deep optical images over the entire 5.4 deg$^2$ of the AKARI NEP wide field. With this deep and wide optical data, we, for the first time, can use the entire AKARI NEP wide data to construct restframe 8$μ$m, 12$μ$m, and total infrared (TIR) luminosity functions (LFs) at 0.15$<z<$2.2. A continuous 9-band filter coverage in the mid-IR wavelength (2.4, 3.2, 4.1, 7, 9, 11, 15, 18, and 24$μ$m) by the AKARI satellite allowed us to estimate restframe 8$μ$m and 12$μ$m luminosities without using a large extrapolation based on a SED fit, which was the largest uncertainty in previous work. By combining these two results, we reveal dust-hidden cosmic star formation history and AGN evolution from z=0 to z=2.2, all probed by the AKARI satellite.

Matheus Treuk Medeiros de Araujo

A palavra grega ἡγεμονίη figura algumas vezes nas Histórias de Heródoto. Em muitos desses casos, o termo é usado para designar realidades helênicas, em especial o comando militar da aliança contra os persas durante as Guerras Médicas. Não obstante, um conjunto igualmente relevante de ocorrências diz respeito aos impérios do Oriente Próximo, denotando os reinos persa ou medo, algo inusitado na Grécia clássica. Considerando o desenvolvimento semântico do vocábulo e, ademais, a ausência de estudos significativos sobre a ἡγεμονίη em contextos orientais, necessário se faz um estudo sistemático de seus usos em Heródoto. As conclusões sobre o significado e alcance do termo nesse período refletem as circunstâncias históricas da composição herodotiana, bem como as intenções específicas do autor, trazendo possíveis balizas ao exame de seu desenvolvimento subsequente.

Mary Fragkaki

Cet article présente la place de la femme spartiate et crétoise, analyse la particularité de chacune de ces deux cités et, par extension, les femmes qui y habitent. A cette fin, nous utilisons le Code de Gortyne, qui est la source principale pour ce qui est l’étude de la femme de Crète, les mentions classiques, pour ce qui est de l’analyse de la femme de Sparte. Notre étude est axée sur l’analyse d’institutions comme la dot, le mariage ainsi que le rôle de la femme en tant que propriétaire. De plus, nous examinons le rôle des femmes de ces des deux cités, en matière de l’exposition d’enfants. Cette étude vise interpréter cette ‘particularité’ crétoise et spartiate dans le cadre de l’οἶκος.

Carlos de Miguel Mora

Este livro constitui o primeiro número de uma coleção que, sob o título de Conferências & Debates Interdisciplinares, tenciona promover aquela que é a missão do Instituto de Investigação Interdisciplinar da Universidade de Coimbra, isto é, o estímulo de uma investigação alicerçada no cruzamento de áreas de saber distintas. O denominador comum que hão de possuir os volumes que integrarão a coleção será o diálogo entre diferentes domínios científicos. (...)

Asif Shakeel, David A. Meyer, Peter J. Love

Quantum Random Walks (QRW) were first defined as one-particle sectors of Quantum Lattice Gas Automata (QLGA). Recently, they have been generalized to include history dependence, either on previous coin (internal, i.e., spin or velocity) states or on previous position states. These models have the goal of studying the transition to classicality, or more generally, changes in the performance of quantum walks in algorithmic applications. We show that several history dependent QRW can be identified as one-particle sectors of QLGA. This provides a unifying conceptual framework for these models in which the extra degrees of freedom required to store the history information arise naturally as geometrical degrees of freedom on the lattice.

Ana Margarida Borges

Durante o último semestre de 2012 e o primeiro trimestre de 2013 realizou-se uma série de ações no âmbito do projeto de investigação “Dioscórides e o Humanismo Português: os Comentários de Amato Lusitano”, financiado pela Fundação para a Ciência e a Tecnologia. O projeto tem como objetivo principal a edição e tradução para português dos dois livros que Amato Lusitano dedicou ao comentário do tratado grego De materia medica de Dioscórides, ou seja, o Index Dioscoridis (Antuérpia, 1536) e as In Dioscoridis Anazarbei de medica materia libros quinque...enarrationes (Veneza, 1553).(...)