Hasil untuk "History"

Martina Del Popolo

Zhongsheng Zhang, Zhongsheng Zhang, Zhongsheng Zhang et al.

Light strongly influences the carbon (C) metabolism of seaweed through both algal carbon content and organic carbon release, thereby driving the carbon cycling of coastal oceans. However, the response of seaweed organic carbon release to varying light intensities remains an underexplored area of research. This study aimed to fill this gap by analyzing the effects of four different light intensities (5, 50, 200, and 500 μmol m–2 s–1) on the growth, carbon content, and organic carbon release of two strains (W28–42 and WO15-4) of Pyropia haitanensis. The results showed that as light intensity increased, both strains experienced an initial rise in growth rate followed by a decline, with the highest growth observed at 200 μmol m–2 s–1. Simultaneously, tissue C content increased with light intensity, whereas the nitrogen (N) and phosphorus (P) contents exhibited decreasing trends. This led to increases in the C:N and C:P ratios, indicating that high light intensity may enhance C fixation and suppress the absorption of N and P. Of particular interest was the difference in organic carbon release between the two strains. The W28–42 strain’s rate of dissolved organic carbon (DOC) release increased significantly with light intensity, whereas the WO15–4 strain’s DOC release rate remained unaffected by variations in light intensity. The particulate organic carbon (POC) release rates of both strains increased under higher light intensity, with the W28–42 strain showing a more substantial increase than the WO15–4 strain. This study demonstrates that the release of DOC by P. haitanensis exhibits distinct strain-specific responses to variations in light intensity, a result that may be attributed to differences in photosynthetic physiology and genetic makeup. These insights provide a foundation for enhancing the efficiency of fishery carbon sinks through the manipulation of light intensity.

Emily K. Roberts, Pier-Emmanuel Tremblay, Mairi W. O'Brien et al.

We compare three methods of deriving the local Galactic star formation history, using as a benchmark the Gaia-defined 40 pc white dwarf sample, currently the largest volume complete sample of stellar remnants with medium-resolution spectroscopy. We create a population synthesis model to 1) reproduce the observed white dwarf luminosity function, 2) reproduce the observed absolute Gaia G magnitude distribution, and 3) directly calculate the ages of all individual white dwarfs in the 40 pc volume. We then compare the star formation histories determined from each method. Previous studies using these methods were based on different white dwarf samples and as such were difficult to compare. Uncertainties in each method such as the initial mass function, initial-final mass relation, main sequence lifetimes, stellar metallicity, white dwarf cooling ages and binary evolution are accounted for to estimate the precision and accuracy of each method. We conclude that no method is quantitatively better at determining the star formation history and all three produce star formation histories that agree within uncertainties of current external astrophysical relations.

Hongyi Zhou, Josiah P. Hanna, Jin Zhu et al.

This paper studies off-policy evaluation (OPE) in reinforcement learning with a focus on behavior policy estimation for importance sampling. Prior work has shown empirically that estimating a history-dependent behavior policy can lead to lower mean squared error (MSE) even when the true behavior policy is Markovian. However, the question of why the use of history should lower MSE remains open. In this paper, we theoretically demystify this paradox by deriving a bias-variance decomposition of the MSE of ordinary importance sampling (IS) estimators, demonstrating that history-dependent behavior policy estimation decreases their asymptotic variances while increasing their finite-sample biases. Additionally, as the estimated behavior policy conditions on a longer history, we show a consistent decrease in variance. We extend these findings to a range of other OPE estimators, including the sequential IS estimator, the doubly robust estimator and the marginalized IS estimator, with the behavior policy estimated either parametrically or non-parametrically.

Radek Trnka, Melisa Schneiderova, Iveta Vojtechova et al.

SuperAging deserves special attention from researchers in the field of the psychology of aging, because it denotes the preservation of multiple cognitive abilities in very old age. Currently, very little is known about lifestyle factors that could be related to SuperAging. The main goal of the present narrative review was to bring together available evidence involving social factors related to SuperAging and to target avenues for future research. The review summarizes the findings of studies published between 2005 and 2022. Low social participation in midlife age and high social participation in older age were found to be related to SuperAging. In contrast, social network size and diversity did not differ between SuperAgers and cognitively normal older adults. The synthesis of the results indicates that having positive, close, high-quality relationships and a high frequency of social contact may be considered to be hypothetical predictors of superior cognitive performance in later life.

David Stefanelly

Research Framework: A Legitimist representative under the Second Republic (1848-1852), Paul de Dieuleveult (1799-1867) embodied the traditional Western notable in the mid-19th century. His privileged social position marks the culmination of a social ascent begun by his father, François-Marie, in Tréguier, Côtes-du-Nord.Objectives: To examine the importance of family heritage in the Legitimist commitment of Paul de Dieuleveult and his fellow Legislative deputies.Methodology: To achieve this, we will draw on the work of our thesis (Stefanelly, 2013) and on the biographical notes of parliamentarians.Results: Paul de Dieuleveult’s commitment to the Legitimist cause was determined by his family background. His father rose socially through his medical activities, his two successive marriages, his attainment of a noble title and the exercise of local responsibilities under the Restoration. Paul belongs to this lineage. Thanks to him, he has considerable material and land assets. His marriage enables him to complete alliances with the region’s prominent families. His entry into politics in the final years of the Restoration period gave concrete expression to his legitimist commitment. The July Monarchy marked a political break, but he returned to the forefront of local political life in 1848 and became a member of parliament. During his term of office, he endeavored to build on his political base by preserving community unanimity.Conclusion: Many of his fellow Legitimists in the West, birthplace of Legitimism, are part of a family heritage. A minority of them have less marked family antecedents and have emerged socially thanks to their abilities.Contributions: The family dimension is essential to understanding the political commitment of a legitimist representative under the Second Republic, even if this is not true in all cases, and the individual psychological dimension is a factor to be taken into account.

Marcin Nowakowski

In this paper we focus on the underlying quantum structure of temporal correlations and show their peculiar nature which differentiate them from spatial quantum correlations. With a growing interest in representation of quantum states as topological objects, we consider quantum history bundles based on the temporal manifold and show the source of violation of monogamous temporal Bell-like inequalities. We introduce definitions for the mixture of quantum histories and consider their entanglement as sections over the Hilbert vector bundles. As a generalization of temporal Bell-like inequalities, we derive the quantum bound for multi-time Bell-like inequalities.

Nadine Tung, Kali Chatham Dougherty, Emily Stern Gatof et al.

Abstract Existing guidance regarding clinically informed germline testing for patients with cancer is effective for evaluation of classic hereditary cancer syndromes and established gene/cancer type associations. However, current screening methods may miss patients with rare, reduced penetrance, or otherwise occult hereditary risk. Secondary finding of suspected germline variants that may confer inherited cancer risk via tumor comprehensive genomic profiling (CGP) has the potential to help address these limitations. However, reporting practices for secondary finding of germline variants are inconsistent, necessitating solutions for transparent and coherent communication of these potentially important findings. A workflow for improved confidence detection and clear reporting of potential pathogenic germline variants (PPGV) in select cancer susceptibility genes (CSG) was applied to a research dataset from real-world clinical tumor CGP of > 125,000 patients with advanced cancer. The presence and patterns of PPGVs identified across tumor types was assessed with a focus on scenarios in which traditional clinical germline evaluation may have been insufficient to capture genetic risk. PPGVs were identified in 9.7% of tumor CGP cases using tissue- and liquid-based assays across a broad range of cancer types, including in a number of “off-tumor” contexts. Overall, PPGVs were identified in a similar proportion of cancers with National Comprehensive Cancer Network (NCCN) recommendations for germline testing regardless of family history (11%) as in all other cancer types (9%). These findings suggest that tumor CGP can serve as a tool that is complementary to traditional germline genetic evaluation in helping to ascertain inherited susceptibility in patients with advanced cancer.

Dinçer A.

Research objectives: The purpose of this study is to analyze the story of Oghuz Khan, which is located in the beginning of Kadyr Ali-bek’s Genghisnāma; to compare this narrative with Rašīd al-Dīn’s Oghuznāma, which is the main source of the work, and other variants of Oghuznāma and to reveal their similarities and original features. Research materials: The sources used in this study mainly consist of Kadyr Ali-bek’s work based on the Qazan manuscript and various Oghuznāma variants carrying Islamic motifs. The main sources include Rashīd al-Dīn Faḍlallāh’s Oghuz narrative in Jāmīʿ al-tawārīkh, Yazïǰïoġlu ‘Ali’s Tavārikh-i Āl-i Selǰuk. The poetic Oghuznāmas, the pre-Islamic version, texts from the periods after Kadyr Ali-bek, and especially texts that do not share the same narrative structure and instead present different genealogical stories, were not influential in the comparative process. Results and novelty of the research: Kadyr Ali-bek’s work is known as Jāmīʿ al-tawārīkh in the academic area, as it is considered a translation of Rašīd al-Dīn’s work. However, when it comes to the Oghuz narrative, it can be seen that the author actually used other sources, but avoided mentioning their names. Comparisons with other Oghuznāma variants show that Kadyr Ali-bek either used the same source as Yazïǰïoġlu ‘Ali, a 15th-century Ottoman historian who wrote Tavārikh-i Āl-i Selǰuk, or directly adapted his work. Because the composition of the two texts is almost the same when the omitted or removed parts from the text are set aside.

Joanna D. Sakowska, Noelia E. D. Noël, Tomás Ruiz-Lara et al.

We present the spatially resolved star formation history (SFH) of a shell-like structure located in the northeastern Small Magellanic Cloud (SMC). We quantitatively obtain the SFH using unprecedented deep photometric data (g~24 magnitude) from the SMASH survey and colour-magnitude diagram (CMD) fitting techniques. We consider, for the first time, the SMC's line-of-sight depth and its optical effects on the CMDs. The SFH presents higher accuracy when a line-of-sight depth of ~3 Kpc is simulated. We find young star formation enhancements at ~150 Myr, ~200 Myr, ~450 Myr, ~650 Myr, and ~1 Gyr. Comparing the shell's SFH with the Large Magellanic Cloud's (LMC) northern arm SFH we show strong evidence of synchronicity from at least the past ~2.8 Gyr and, possibly, the past ~3.5 Gyr. Our results place constraints on the orbital history of the Magellanic Clouds which, potentially, have implications on their dynamical mass estimates.

Hyejin Hong, Hibiki Kawano, Takuto Maekawa et al.

In today's society, information overload presents challenges in providing optimal recommendations. Consequently, the importance of dialogue systems that can discern and provide the necessary information through dialogue is increasingly recognized. However, some concerns existing dialogue systems rely on pre-trained models and need help to cope with real-time or insufficient information. To address these concerns, models that allow the addition of missing information to dialogue robots are being proposed. Yet, maintaining the integrity of previous conversation history while integrating new data remains a formidable challenge. This paper presents a novel system for dialogue robots designed to remember user-specific characteristics by retaining past conversation history even as new information is added.

Andrea Santangelo, Rosalia Madonia, Santina Piraino

In this chapter, we briefly review the history of X-ray astronomy through its missions. We follow a temporal development, from the first instruments onboard rockets and balloons to the most recent and complex space missions. We intend to provide the reader with detailed information and references on the many missions and instruments that have contributed to the success of the exploration of the X-ray universe. We have not included missions that are still operating, providing the worldwide community with high-quality observations. Specific chapters for these missions are included in a dedicated section of the handbook.

Caitlin C. Doughty, Joseph F. Hennawi, Jose Oñorbe et al.

The epoch of hydrogen reionization is complete by $z=5$, but its progression at higher redshifts is uncertain. Measurements of Ly$α$ forest opacity show large scatter at $z<6$, suggestive of spatial fluctuations in neutral fraction ($x_\mathrm{HI}$), temperature, or ionizing background, either individually or in combination. However, these effects are degenerate, necessitating modeling these physics in tandem in order to properly interpret the observations. We begin this process by developing a framework for modeling the reionization history and associated temperature fluctuations, with the intention of incorporating ionizing background fluctuations at a later time. To do this, we generate several reionization histories using semi-numerical code AMBER, selecting histories with volume-weighted neutral fractions that adhere to the observed CMB optical depth and dark pixel fractions. Implementing these histories in the \texttt{Nyx} cosmological hydrodynamics code, we examine the evolution of gas within the simulation, and the associated metrics of the Ly$α$ forest opacity. We find that the pressure smoothing scale within the IGM is strongly correlated with the adiabatic index of the temperature-density relation. We find that while models with 20,000 K photoheating at reionization are better able to reproduce the shape of the observed $z=5$ 1D flux power spectrum than those with 10,000 K, they fail to match the highest wavenumbers. The simulated autocorrelation function and optical depth distributions are systematically low and narrow, respectively, compared to the observed values, but are in better agreement when the reionization history is longer in duration, more symmetric in its distribution of reionization redshifts, or if there are remaining neutral regions at $z<6$. The systematically low variance likely requires the addition of a fluctuating UVB.

Wahyu Widyasih

This study aims to identify the types of art archives and arrange their arrangement designs in order to support the development of the tridharma of higher education at the Indonesian Institute of the Arts (ISI) Surakarta. The archives studied are the archives of performing arts that are the result of the Tridharma organization. The research was conducted using a qualitative descriptive method. That is describing a situation based on the facts that appear. The results of field observations show that the performing arts document consists of text, audio, and video. Its creation cannot be separated from previous works of art as a reference or source of works of art. Artwork documents are archives because they are the result of the tridharma process, but have only been managed as a library. The archives are dominated by final works of art from study programs at the Faculty of Performing Arts, results of artistic research from the Research Centre, and results of community service works of art from the Centre for Community Service. ISI Surakarta Archives Retention Schedule stipulates the archive as a static archive (permanent) after the retention period expires. Its arrangement requires a design according to archival standards. The design is made by taking into account the principle of provenance and original order. The design includes archive creators, archive classification (final project reports, research, and community service), archive indexes (reports, audio visual recordings, and intellectual property certificates), archive cross-linking to link different types of archives for the same archive, information archives, access conditions and archive service procedures.   Keywords: archive, arrangement, design, performing arts, tridharma

E. Cukanovaite, P. -E. Tremblay, S. Toonen et al.

We derive the local stellar formation history from the Gaia-defined 40 pc white dwarf sample. This is currently the largest volume-complete sample of white dwarfs for which spectroscopy is available, allowing for classification of the chemical abundances at the photosphere, and subsequently accurate determination of the atmospheric parameters. We create a population synthesis model and show that a uniform stellar formation history for the last ~10.5 Gyr provides a satisfactory fit to the observed distribution of absolute Gaia G magnitudes. To test the robustness of our derivation, we vary various assumptions in the population synthesis model, including the initial mass function, initial-to-final mass relation, kinematic evolution, binary fraction and white dwarf cooling timescales. From these tests, we conclude that the assumptions in our model have an insignificant effect on the derived relative stellar formation rate as a function of look-back time. However, the onset of stellar formation (age of Galactic disc) is sensitive to a variety of input parameters including the white dwarf cooling models. Our derived stellar formation history gives a much better fit to the absolute Gaia G magnitudes than most previous studies.

Conceição Solange Bution PERIN, Terezinha OLIVEIRA

Entender a simbologia usada no século XIII, por Ramon LLull (1232-1316), é compreender um pouco sobre as necessidades que os homens viviam e que os levavam a explorar a racionalidade. Logo, a nossa questão é a de analisar a prioridade do conhecimento como questão central da formação humana. Pretendemos fazer uma reflexão sobre a obra de Llull para compreender sobre o papel de quem ensina e a importância da transformação do discurso na ação/prática.

Lumin Chen, Chong Miao, Yanling Chen et al.

Abstract Background Risk factors that predispose the development of severe community-acquired pneumonia (CAP) among pediatric CAP patients of different age ranges are yet to be identified. Methods We retrospectively analyzed pediatric in-patients (< 6 years old) diagnosed with CAP in our hospital. We subdivided patients into four age groups (< 6 months, 6 months-1 year, 1–2 years, and 2–6 years). Their medical records, including demographic information, clinical features, laboratory findings, and chest radiographic reports, were reviewed and collected for further analysis. Univariate logistic regression analysis and stepwise regression analysis were applied to identify risk factors associated with severe CAP and ICU admission for overall patients and age-stratified subgroups. Results A total of 20,174 cases were initially included. Among them, 3309 (16.40%) cases were identified as severe CAP, and 2824 (14.00%) cases required ICU admission. Potential risk factors for severe CAP and ICU admission identified by univariate analysis included younger age, rural residency, premature birth, low birth weight (LBW), formula feeding, congenital heart disease (CHD), history of pneumonia or neonatal jaundice, patients with other health issues, certain symptoms (manifesting wheezing, dyspnea, cyanosis, but have no cough or fever), abnormal laboratory findings (abnormal levels of white blood cells, albumin, and C-reactive protein and RSV infection), and chest X-ray (odds ratio [OR] > 1 for all). CHD, low albumin, proteinuria, abnormal chest x-ray were independent risks factors across different age groups, whereas birth or feeding history, history of pneumonia, cyanosis or dyspnea on admission, and RSV infection were independent risk factors for only younger kids (< 1 year), and wheezing was an independent risk factor only for older children (2–5 years old). Conclusions Risk factors predicting disease severity among children hospitalized with CAP vary with age. Risk factor stratification of pediatric CAP based on age-specific risk factors can better guide clinical practice. Trial registration This study has been registered in China, with the registration number being ChiCTR2000033019 .

Andrey Schelchkov

The division in the international communist movement and the creation of Trotskyism movement coincided with turbulent revolutionary events in Spain, where the left-wing forces were building up their forces. As in many other countries, the split of the communists was reflected in domestic politics, one of the aspects of which was the confrontation and extreme hostility of the two currents in world communism. The Spanish question and the situation in Spanish Trotskyism had a significant impact on the process of forming the doctrine of Trotskyism, primarily in the issue of electoral unions, attitudes towards the Popular Front, and the tasks of the communists in the democratic revolution. This work highlights the process of the formation of the Trotskyist movement in Spain, the influence and role in this process of the International Secretariat of Trotskyism, internal splits in the movement, the participation of Spanish Trotskyism in the revolutionary movement.

Holly Jackson, Paula Jofre, Keaghan Yaxley et al.

Since chemical abundances are inherited between generations of stars, we use them to trace the evolutionary history of our Galaxy. We present a robust methodology for creating a phylogenetic tree, a biological tool used for centuries to study heritability. Combining our phylogeny with information on stellar ages and dynamical properties, we reconstruct the shared history of 78 stars in the Solar Neighbourhood. The branching pattern in our tree supports a scenario in which the thick disk is an ancestral population of the thin disk. The transition from thick to thin disk shows an anomaly, which we attribute to a star formation burst. Our tree shows a further signature of the variability in stars similar to the Sun, perhaps linked to a minor star formation enhancement creating our Solar System. In this paper, we demonstrate the immense potential of a phylogenetic perspective and interdisciplinary collaboration, where with borrowed techniques from biology we can study key processes that have contributed to the evolution of the Milky Way.

Lara Okihiro

Le paysage est une partie importante de l'imaginaire social canadien et de l'histoire de l'exploitation du pays (des premiers colons européens au développement de l'oléoduc). Requiem, un roman de Frances Itani, et Rebuild, un recueil de poèmes de Sachiko Murakami, montrent tous deux la terre comme l'une des choses les plus précieuses prises aux Canadiens japonais pendant leur persécution par le gouvernement (1942-1949). Dans Requiem, le paysage est lié à l’histoire personnelle du protagoniste et conserve tout ce qui reste de tous les événements passés, ce qui en fait une source de réflexion et de guérison. Dans Rebuild, cependant, les tours en copropriété et les maisons construites pendant le boom immobilier de Vancouver ont pris le contrôle du paysage, effaçant l’histoire des peuples autochtones, et même des Canadiens d'origine japonaise, et engendrant une expérience de profonde désorientation et d'aliénation. Cet article analyse les expériences de la terre en tant que guérison et aliénation pour examiner ce que le roman et les poèmes nous disent sur notre relation contemporaine aux paysages : quelles sont les bonnes et les mauvaises manières de vivre sur la terre et comment devrions-nous vivre maintenant sur la terre ?