Hasil untuk "Periodicals"

Riccardo Tosi

We compute the periods associated with a special class of hyperplane arrangements. In particular, we exhibit a combinatorial condition on the intersection lattice of a hyperplane arrangement that ensures that its associated periods are linear combinations of special values of multiple polylogarithms. Our method generalizes Brown's approach to the periods of moduli spaces of curves of genus zero. We apply this result to the reflection arrangement of the full monomial group, whose periods are shown to be linear combinations of values of multiple polylogarithms at roots of unity.

Adam Skowyrski

Following methods used by A. Dugas for investigating derived equivalent pairs of (weakly) symmetric algebras, we apply them in a specific situation, obtaining new deep results concerning iterated mutations of symmetric periodic algebras. More specifically, for any symmetric algebra $Λ$, and an arbitrary vertex $i$ of its Gabriel quiver, one can define mutation $μ_i(Λ)$ of $Λ$ at vertex $i$ via silting mutation of the stalk complex $\La$. Then $μ_i(Λ)$ is again symmetric, and we can iterate this process. We want to understand the order of $μ_i$, in case the vertex $i$ is $d$-periodic, i.e. the simple module $S_i$ associated to $i$ is periodic of period $d$ (with respect to the syzygy). The main result of this paper shows that then $μ_i$ has order $d-2$, that is $μ_i^{d-2}(Λ)\congΛ$ (modulo socle), under some additional assumption on the (periodic) projective-injective resolution of $S_i$. Besides, we present briefly some consequences concerning arbitrary periodic vertex and give few sugestive examples showing that this property should hold in general, i.e. without restrictions on the periodic projective resolution.

Philip Korman, Yi Li

In this note we unify the results of A.C. Lazer and P.O. Frederickson [3], A.C. Lazer [6], A.C. Lazer and D.E. Leach [7], J.M. Alonso and R. Ortega [1], and P. Korman and Y. Li [4] on periodic oscillations and unbounded solutions of nonlinear equations with linear part at resonance and periodic forcing. We give conditions for the existence and non-existence of periodic solutions, and obtain a rather detailed description of the dynamics for nonlinear oscillations at resonance, in case periodic solutions do not exist.

Ekaterina A. Lavrenteva, Mikhail A. Bronov

The article examines the typography of the Soviet avant-garde of the 1920s as a synthetic form of art that combines visual and sound components in a single rhythmic statement. In the context of industrialization, urbanization and revolutionary transformations, the graphic structure of the text turns into an analogue of a sound score, absorbing the rhythms of machines and propaganda speech. The study is based on the theoretical ideas of El Lissitzky, Kazimir Malevich, Nikolai Kulbin, as well as a modern interpretation of the art of typography and poetic experiments of the Russian avant-garde, which allow us to generally understand this art form as a form of visual declamation. Typography is analyzed through the lense of rhythmic declamation and noise music as expressive practices associated with changing the perception of sound and its visualization. Letters and words in the compositions of Rozanova, Zdanevich, Stepanova, Lisitsky, Klutsis and Rodchenko become not just carriers of meaning, but active rhythmic elements, similar to the graphic rhythm of musical notation. Case studies - from "The Tale of Two Squares" to the covers of books and periodicals, collections of musical works, the ability of typography to set the tempo, intonation and visual equivalent of the spoken text is demonstrated. The analysis extends to theatre and cinema, where text operates as a performative element: in Popova’s scenography and Meyerhold’s productions, and in Vertov’s and Eisenstein’s film editing, typography acquires spatial and kinetic dimensions. Avant-garde text leaves the printed page and enters urban environments—storefronts, posters, banners, and propaganda trains—forming a large-scale visual-soundscape of collective action. The study identifies rhythmic organization as a key aesthetic and ideological category that links artistic forms with the socio-cultural context of the time. Avant-garde typography emerges as the language of a new era—an expressive tool that integrates the principles of industrial rhythm, performative text, and the synthetic nature of revolutionary culture.

Yu Yang, Yu Yang, Jinfeng Cao et al.

BackgroundCardiovascular disease (CVD) is a major global health issue. The triglyceride-glucose (TyG) index, a marker of insulin resistance, and the body roundness index (BRI), reflecting visceral adiposity, are key risk factors for chronic diseases. However, research on the long-term impact of changes in obesity and metabolic markers on CVD risk is limited. This study examines the association between long-term changes in the TyG-BRI composite index and CVD incidence in middle-aged and older Chinese adults.MethodsData were obtained from the China Health and Retirement Longitudinal Study, which included 4,446 middle-aged and elderly from 2011 to 2015. The participants were classified into three clusters based on TyG-BRI changes by K-means clustering method. Logistic regression analyses and restricted cubic spline (RCS) regression analyses were used to assess the association between the TyG-BRI and CVD incidence. Receiver operating characteristic (ROC) curves were generated to compare the predictive accuracy of the TyG-BRI, TyG, and BRI.ResultsBy the end of 2015, 1,007 participants (22.6%) had developed CVD. The incidence of CVD increased progressively across TyG-BRI clusters. After adjusting for multiple covariates, logistic regression analysis revealed a significant correlation between the TyG-BRI and the onset of CVD [odds ratio, 95% confidence interval: 1.251 (1.139–1.373) per 1 SD increase]. The RCS regression analysis revealed a significant positive and linear relationship between the TyG-BRI and CVD incidence (P for overall < 0.001, P for nonlinear = 0.874). ROC analysis revealed that the TyG-BRI had greater predictive accuracy for CVD than either BRI or TyG alone did (AUC: 0.678 vs. 0.583 and 0.555, P < 0.001).ConclusionLong-term variations in the TyG-BRI index are closely associated with CVD risk, demonstrating superior predictive performance compared to using BRI or TyG alone. Our findings offer new insights into the interplay between metabolic dysfunction and cardiovascular risk. TyG-BRI may serve as a more effective auxiliary tool for CVD risk assessment and provides valuable guidance for the early identification of high-risk populations.

Tomas Petreikis, Aušra Navickienė

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Tolkacheva Albina A.

The article is devoted to the history of the design and construction of the Siberian Naval Crew, a complex of buildings for servicemen of the Siberian Military Flotilla in Vladivostok. The architectural objects were built in the late nineteenth and early twentieth century according to the designs of engineers of the Marine Construction Corps serving in the Management of Ports of the Eastern Ocean. Currently, there are no publications on architectural activities, participants and results of the Construction part of the Eastern Ocean Ports Authority. This study covers archival materials (design and text documents) from the stocks of the Russian Navy (Russian State Archive of the Navy), periodicals, and field research. Previously unknown facts about the professional activities of the Marine Corps engineers, designers and builders are revealed.

Yen-Tsung Chen, Changningphaabi Namoijam

Inspired by the relations between periods of elliptic integrals of the third kind and the periods of the extensions of the corresponding elliptic curves by the multiplicative group, we introduce the notion of the third kind periods for abelian $t$-modules and establish an evaluation for these periods that is parallel to the classical setting. When we specialize our result to the case of Drinfeld modules, an explicit formula for these third kind periods is established. We also prove the algebraic independence of periods of the first, the second, and the third kind for Drinfeld modules of arbitrary rank. This generalizes prior results of Chang for rank $2$ Drinfeld modules.

J. I. Katz

Li {\it et al.\/} (2024) reported a 4.605 day period in the repeating FRB 20121102A in addition to the previously reported 157 day modulation of its activity. This note suggests that the shorter period is the orbital period of a mass-transferring star orbiting a black hole, possibly of intermediate mass, and that the 157 day period is the precession period of an accretion disc around the black hole. The mass-losing star must be evolved.

Hannah Larson, Ravi Vakil

We state and prove a form of Bott periodicity (for $U(n)$) in an algebraic setting (so, $GL(n)$) which makes sense over $\mathbb{Z}$, which also specializes to Bott periodicity in the usual sense (hence giving yet another proof of classical Bott periodicity). An appendix by B. Church gives a specialization of the constructions and results to motivic homotopy theory, which may be of independent interest.

Denis V. Tumakov

This article analyzes the materials of the central periodical press of 1992, devoted to the relationship between the federal Center and the Chechen Republic in the first year after the proclamation of the last independence. The article analyzes publications typical of content from the most authoritative and popular Russian mass media of the early 1990s, regardless of their political views. Of the greatest interest is the visit to Grozny in the autumn of 1992 by a large group of representatives of the largest electronic and print media, organized and paid for by the Government of Chechnya. The subject of interest of the capital’s journalists was the difficulties of the negotiation process between Moscow and Grozny, the difficult criminal situation in the republic, the attempts of Russian law enforcement agencies to resist Chechen crime, the alignment of political forces inside Chechnya, and the formation of its armed forces. Frequent interviews with General-President D.M. Dudaev played an important role in the perception of the republic in Russia Moscow newspapers and magazines. The press frequently cited other important figures of this regime – M. Temishev, M. Udugov and H. Akhmadov. The conclusion is made about the inconsistency of publications of Russian periodicals on the Chechen topic. On the one hand, the journalists recognized the illegality of the separatists’ coming to power and did not hide several negative consequences of this event. On the other hand, they convinced readers that any violent action by the Center in Chechnya could cause a major war in the Caucasus, and therefore called on the authorities to negotiate with Grozny and did not even protest against the recognition of the independence of the self-proclaimed republic.

Myriam Juan, Stella Scabelli

This essay compares the professional experiences of Suzanne Chantal and Paola Ojetti in 1930s France and in 1930s and early-1940s Italy, respectively. Beyond their very different political, national, and cultural contexts, these women both occupied central positions within some of the most influential film periodicals of the era: Suzanne Chantal for Cinémonde  and Paola Ojetti for Film. This study is mainly based on sources which enable us to take a closer look at their activities, their working conditions, and their feelings regarding the treatment they received while working for these periodicals. Sources include Suzanne Chantal’s memoirs and her personal diaries from the late 1930s, kept by her family, and Paola Ojetti’s extensive working correspondence, preserved in the Fondo Mino Doletti of the Biblioteca Renzo Renzi at the Cineteca di Bologna, as well as other correspondence documents preserved in Italian archives. This paper explores the working trajectories and social positioning made by these two largely forgotten but powerfully significant figures in order to establish themselves in a predominantly male professional and cultural environment, while at the same time questioning the limits of their integration. By shedding light on microhistory and questioning gender issues, this article turns its attention primarily to working practices, women’s paths, and social networks of film press and film criticism history.

Sofie Vandepitte

Review of Amy Matthewson, Cartooning China: Punch, Power, & Politics in the Victorian Era (2022)

Michal Pawlak

The long secondary period (LSP) phenomenon, which is commonly observed in pulsating red giants, has not been detected in any Mira yet. The goal of this paper is to verify, if there is a physical reason for this or if it is simply an observational bias. The OGLE-III Sample of Long Period Variables in the Large Magellanic Cloud, containing 1663 Miras, is used to perform a search for secondary periodicity in these objects and identify candidates for the long secondary period stars based on the location on the period-luminosity diagram. Out of 1663 Miras, 108 were identified as potential candidates, with variability broadly consistent with LSP. This makes 7% of the whole Mira sample in the Large Magellanic Cloud. Most, if not all of the Mira LSP candidates are C-rich stars. The results of this analysis suggest that Miras may exhibit long secondary periods. However, the long-term variability can also be related to period and amplitude irregularities that Miras are known to exhibit. Further study will be necessary to draw a definitive conclusion.

Simon Hsu, Michael H. Criqui, Charles Ginsberg et al.

ABSTRACT Studies on associations between biomarkers of vitamin D metabolism and fracture risk have focused predominantly on White or elderly populations and may not be generalizable to relatively healthy multiethnic populations. We tested associations of total 25‐hydroxyvitamin D (25[OH]D), the ratio of 24,25‐dihydroxyvitamin D3 to 25‐hydroxyvitamin D3 (vitamin D metabolite ratio, VDMR), parathyroid hormone (PTH), and fibroblast growth factor‐23 (FGF‐23) concentrations measured in serum with risk of hip and vertebral fractures in the Multi‐Ethnic Study of Atherosclerosis (MESA). Serum 25‐hydroxyvitamin D2 and D3 and 24,25‐dihydroxyvitamin D3 were measured by liquid chromatography–tandem mass spectrometry (LC–MS/MS). The study cohort of 6466 participants was without clinically apparent cardiovascular disease and was 39% White, 27% Black, 22% Hispanic, and 12% Chinese. The mean age was 62 years, and 53% were female. There were 128 hip and vertebral fractures over a mean follow‐up of 14.2 years. 25(OH)D, the VDMR, PTH, and FGF‐23 were not significantly associated with fracture risk after adjustment for demographics, diabetes, smoking, systolic blood pressure, body mass index, medication use, albuminuria, and estimated glomerular filtration rate. Principal component analysis did not suggest differences in linear combinations of 25(OH)D, the VDMR, PTH, and FGF‐23 between participants who experienced fractures and those who did not. We did not observe significant interaction between race and ethnicity and any biomarker of vitamin D metabolism on fracture risk. In conclusion, none of the four serum biomarkers of vitamin D metabolism investigated showed a significant association with fracture risk in relatively healthy multiethnic populations. © 2022 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.

Edyta Wolter

The purpose of this paper is to present the subject of education for ecological awareness on the example of a "Free Addition to natural sciences monthly for youths Orli Lot [Eagle Flight] devoted to environmental protection, issued by the National Council of Environmental Protection”. The structure of this article is based on chronology and issue analysis. It is made of three parts: paper devoted to environmental protection, care about establishing school circles of League for Nature Conservation, activity of youths sightseeing societies in the scope of environmental protection and education for ecological awareness.      

Salih Okumuş

The Balkans are in an extremely important geography today as they were yesterday. The Balkans, whose star started to shine again with the disintegration of Yugoslavia, are also closely related to our country due to the Turkish presence in it. Although our relations established in the past changed according to the historical and political events, the Balkan geography, which was under the domination of the Turks for about five hundred and fifty years, was reshaped after the Ottomans. The region was shared among the Austrian, Hungarian and Serbian kingdoms. These years have been considered as a very difficult and dark period for Turks and Muslims. However, with the historical events that developed after the World War II and the establishment of the Federal People’s Republic of Yugoslavia, Turks began to gain some rights like other communities living in this region. These innovations, which are mostly manifested in the field of Turkish press and broadcasting, showed themselves in a short time with activities in the field of newspaper, magazine printing, culture, and education. These developments, which made it possible to provide education in Turkish in primary schools in a short time and to publish books to be taught in these schools and other Turkish publications, gained ground with the establishment of Birlik in Skopje and Tan Publications in Pristina. In this context, various newspapers and magazines and books were published. TV and Radio broadcasts were made in Turkish. All these contributed to the survival of the Turkish presence in the region and to the development of the spirit of unity and solidarity. Also, the existence of periodicals in the region would be helpful for tracing the past. In this line, we will try to deal with the types of narrative in children’s magazines that have made significant contributions to the development of Turkish children’s literature in the region. Sevinç and Tomurcuk children’s magazines published in Skopje and Kuş, Türkçem and Bahar magazines published in Kosovo are extremely important and effective publications in this sense. Our aim is to examine the narrative genres published in the aforementioned journals and to investigate the effects of these genres on children. In particular, the selection of stories, tales, legends and epics, and their volumes, authors, origins, and themes will be investigated.

Xin Wu, Zhen Deng, Qiangqiang Zhao

BackgroundImmunotherapy has shown great potential for the treatment of multiple cancer and has been proven to be closely related to the tumor microenvironment. This article reveals collaborations and interactions among authors, nations, organizations, and periodicals assesses the knowledge base, and discovers hot tendencies and new topics associated with immunotherapy-tumor microenvironment (TME) research.MethodsThis article utilized bibliometrics and visual methods to provide a comprehensive overview of immunotherapy-TME research. Our team retrieved the WoSCC for research and reviews associated with immunotherapy and the tumor microenvironment. VOSviewer and Citespace were primarily used for literature measurement and knowledge graph analysis.ResultAll English articles and reviews on cancer immunotherapy effectiveness were collected, and 1,419 academic journals with 53,773 authors from 7,008 institutions in 92 countries/regions were found. Publications associated with immunotherapy-TME research were stably increasing. Frontiers of Immunology (n = 722) published the most papers on immunotherapy-TME, and Cancer Research (n = 6761) was the top co-cited journal. The published journals and co-cited journals focused on cancer and immunology fields. The League of European Research Universities (n = 978), Harvard University (n = 528), and the University of Texas system (n = 520) were the most productive institutions. Yang Liu (n = 34) and Topalian (n = 1978) ranked first among the top 10 scholars and co-cited scholars. Simultaneously, immunotherapy-TME researchers were involved in active collaborations. Elements of TME, the foundation of immunotherapy, and the application of immunotherapy in cancers represented the three principal aspects of immunotherapy-TME research. The latest hot spots are drug resistance, prognosis prediction, efficacy prediction, and m6A. Nanomedicine and m6A may be future hot topics. Future research in immunotherapy-TME may be directed at discovering how m6A modification affects tumor development by altering the tumor microenvironment and exploring how to enhance response or reduce drug resistance to immunotherapy by reversing or mediating the physicochemical properties of the TME.ConclusionsM6A and nanomedicine are also emerging hotspots in time zone diagrams with high centrality, and prognosis prediction using bioinformatics based on the development of prediction technology may be another future research hotspot.

Jing‐Yu Lin, Ming‐Hui Sun, Jing Zhang et al.

ABSTRACT Solid‐state nuclear magnetic resonance (SSNMR), a technique capable of studying solid or semisolid biological samples, was first applied to study the cell differentiation and mineralization using the whole‐cell sample. Mesenchymal stromal cells (MSCs) with multipotent differentiation capacity were induced to differentiate into osteoblasts. The whole differentiation process, osteoblast mineralization and the mineral maturation, was investigated using SSNMR, providing intact, atomic level information on the cellular mineral structural transformation. Our research indicated the extent of osteoblast mineralization could vary significantly for different cell populations whereas the difference was not easily shown by other means of characterization. The SSNMR spectra revealed hydroxylapatite (or hydroxyapatite [HAP]) formation around 2 to 4 weeks after osteogenic induction for MSCs with a high differentiation potency. The early mineral phase deposit before HAP formation contained a high amount of HPO42−. The structures of minerals in the extracellular matrix (ECM) of osteoblasts could evolve for a period of time, even after the incubation of cells has been stopped. This observation was only possible by studying the sample in an intact state, where ECM was not disturbed. These findings improved our understanding of MSCs, which had wide applications in bone regeneration and tissue engineering. Meanwhile, this work demonstrated the advantage of studying these cellular systems as a whole without any mineral extraction, which had been largely overlooked. © 2022 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.

P. Jung, P. Hänggi