bluuebunny/crossref_metadata_2025_split huggingface dataset:
Temporal and spatiotemporal soliton molecules in ultrafast fibre lasers
Authors: Mao Ding , Yuan Zichuan , Dai Ke , Chen Yue , Ma Huihui , Ling Qiang , Zheng Jiancheng , Zhang Yusheng , Chen Daru , Cui Yudong , Sun Zhipei , Malomed Boris A. 
Published: February 2025

Abstract
Ultrafast fibre lasers, characterized by ultrashort pulse duration and broad spectral bandwidth, have drawn significant attention due to their vast potential across a wide range of applications, from fundamental scientific to industrial processing and beyond. As dissipative nonlinear systems, ultrafast fibre lasers not only generate single solitons, but also exhibit various forms of spatiotemporal soliton bunching. Analogous to molecules composed of multiple atoms in chemistry, soliton molecules (SMs) – alias bound states – in ultrafast fibre lasers are a key concept for gaining a deeper understanding of nonlinear interaction and hold a promise for advancing high-capacity fibre-optic communications. SMs are particularly notable for their high degree of controllability, including their internal temporal separation, and relative phase differences, thereby suggesting new possibilities for manipulating multi-pulse systems. In this review, we provide a comprehensive overview of recent advancements in the studies of SMs with the multidimensional parameter space in ultrafast fibre lasers. Owing to the flexibility afforded by mode-locking techniques and dispersion management, various types of SMs – with diverse values of the soliton number, relative phase, pulse separation, carrier frequencies, and even modal dispersion – have been experimentally demonstrated. We also discuss other basic nonlinear optical phenomena observed in fibre lasers, including the formation, spatiotemporal pulsations, and interaction dynamics of SMs. Furthermore, we explore the multidimensional control of SMs through approaches such as gain modulation, polarization control, dispersion management, and photomechanical effects, along with their applications to optical data encoding. Finally, we discuss challenges and future development of multidimensional technologies for the manipulation of SMs.
Performing positive politeness: political rhetoric in state dinner speeches by US-American presidents
Authors: Schubert Christoph 
Published: February 2025

Abstract
In state dinner speeches, US-American presidents address international partners with the communicative goal of consolidating and improving bilateral political relations. The present paper aims to investigate the ways in which positive politeness strategies are employed in this epideictic genre to establish a good rapport with other heads of state. The study is based on a dataset of 32 dinner speeches covering a period of 32 years from George H. W. Bush to Joseph R. Biden. It adopts a qualitative approach that combines politeness theory with move structure analysis, identifying characteristic rhetorical moves that create familiarity by referring to common past events, shared values, and joint activities. As is shown, politeness in dinner speeches relies on recurring discursive techniques such as displaying strong interest in the international partner, seeking agreement regarding political agendas, paying compliments, and conveying optimism about the bilateral alliance. These politeness strategies are realized by a variety of linguistic devices such as inclusive first-person pronouns, illustrative metaphors, positively connoted stance markers, superlatives, adverbial amplifiers, and quotations from eminent writers of the partner country. Such genre-dependent positive politeness dominantly fulfils a face-enhancing function and helps the orators to construct engaging identities of the interactants.
Spectral deviations of graphs
Authors: Stanić Zoran 
Published: February 2025

Abstract
For the graphs

G

G

and

H

H

, the spectral deviation of

H

H

from

G

G

is defined as

ϱ

G

(

H

)

=

∑

μ
∈
H

min

λ
∈
G

∣
λ
−
μ
∣
,

{\varrho }_{G}\left(H)=\sum _{\mu \in H}\mathop{\min }\limits_{\lambda \in G}| \lambda -\mu | ,

where

∈

\in

designates that the given number is an eigenvalue of the adjacency matrix of the corresponding graph. In this study, we consider the problem of existence of a proper induced subgraph

H

H

of a prescribed graph

G

G

such that

ϱ

G

(

H

)

=
0

{\varrho }_{G}\left(H)=0

, and the problem of determination of all such subgraphs. We investigate these problems in the framework of Smith graphs and their induced subgraphs, graphs with small second largest eigenvalue, graphs with small number of either positive or distinct eigenvalues, integral graphs, and chain graphs. Our results can be interesting in the context of graphs with a fixed number of distinct eigenvalues, eigenvalue distribution, or spectral distances of graphs.
Simone Weil : une lecture philosophique de l’Iliade
Authors: Minas Julie 
Published: February 2025

AbstractThis article analyses an article by Simone Weil written in 1937–1938 entitled 'The Iliad or the poem of force'. The aim is to show that Simone Weil's reading of the Iliad is essential for understanding the genesis of her own thought, and in particular of her concept of force, although it appears in other contexts where there is no question of Hellenism, and although other possible inspirations can be identified. On the other hand, he argues that Simone Weil's analyses are highly refined and interesting in their own right, insofar as they highlight essential points of the Homeric text, despite their partiality.
Testosterone in long-term sedentary aging males: Effect of antiaging strategies
Authors: Abdel-Sater Khaled A. 
Published: February 2025

AbstractPhysical activity can provide health benefits if done regularly and of sufficient duration and intensity. The World Health Organization recommends adults do 150–300 min of moderate-intensity activity per week, 75–150 min of vigorous-intensity activity, or an equivalent combination.Physical inactivity is the fourth leading cause of early death globally, with 31% of the world's population not getting enough physical activity. Aging is defined by rapid decline in physical activity, loss of mobility, and premature morbidity.Low testosterone levels in men decline from 30 to 40 years of age, and this continues until death. Antiaging strategies, such as caloric restriction, balanced diet, regular exercise, weight management, diabetes control, and smoking cessation can prevent and treat aging-related diseases. Exercise significantly boosts testosterone production, with levels varying based on type, frequency, volume, intensity, and duration. It increases muscle steroidogenesis, total testosterone, and free testosterone in the elderly. Testosterone replacement therapy in elderly men improves physical function, strength, protein synthesis, cholesterol, bone density, sexual desire, erectile function, and overall cognition. However, some studies suggest dehydroepiandrosterone supplementation may provide health improvements without negative effects, potentially reversing arterial aging and reducing the risk of cardiovascular diseases. Senolytic therapeutics focus on cellular senescence, and stem cell transplantation investigates the therapeutic potential of older stem cells.
РОЗРОБЛЕННЯ РЕЦЕПТУРИ СМУЗІ НА ОСНОВІ СЕЛЕРИ ТА ВИЗНАЧЕННЯ ЙОГО СТІЙКОСТІ
Authors: Науменко К. І. , Кузнецова І. О. , Доценко Н. В. , Лисюк В. М. 
Published: February 2025

Селера є одним із перспективних інгредієнтів для створення смузі завдяки її детоксикаційним властивостям, високому вмісту клітковини та низькій калорійності. Проте важливими аспектами при створенні таких напоїв є досягнення збалансованого смаку, текстури та тривалості зберігання, що зумовлює необхідність дослідження оптимальних співвідношень компонентів, їх фізико-хімічних властивостей та органолептичних характеристик.
У зв’язку з цим, метою кваліфікаційної роботи є розроблення рецептури смузі на основі селери, визначити оптимальні співвідношення інгредієнтів, дослідити фізико-хімічні показники та стійкість напою. У роботі проведено детальний аналіз харчових властивостей селери, яблука та банана, які були обрані основними компонентами смузі. Розроблено п'ять рецептур смузі з різними співвідношеннями інгредієнтів (селера : яблуко : банан). Найбільш збалансованим за смаковими характеристиками визначено співвідношення 2:1:1, яке забезпечує гармонійний смаковий профіль і привабливу консистенцію. Проведено фізико-хімічний аналіз, що включав визначення вмісту вітамінів, кислотності, pH, енергетичної цінності, що підтвердило збалансованість продукту. Визначено стійкість смузі за різних умов зберігання. Показано, що додавання натаміцину у концентрації 5 мг/дм³ значно подовжує термін придатності продукту: до 21 доби при температурі 0–4°C та до 14 діб за кімнатної температури.
Synergistic effect of MXene and Ag NP–decorated aligned Ag NWs on SERS
Authors: Tang Zilun , Su Qiuping , Xiao Dingshu , Wu Jianyu , Li Jianpeng , Liang Hongping , Li Xianfeng , Diao Guiqiang 
Published: February 2025

In this work, MXene and Ag nanoparticle (Ag NP)–decorated aligned Ag nanowires (Ag NWs) are applied to achieve surface-enhanced Raman scattering (SERS). MXene/Ag NP–decorated aligned Ag NWs based PDMS (polydimethylsiloxane) (MAAP) substrate is fabricated following the order of oil–water–air interfacial self-assembly of aligned Ag NWs, then surface modification of Ag NPs, and drop-casting of MXene last. The synergistic effect of MXene and Ag NP–decorated Ag NWs confers the MAAP substrate with high sensitivity, universality (limit of detection of 10−10 M for rhodamine 6G and crystal violet, 10−9 M for malachite green), and reproducibility. Based on the existence of PDMS, the MAAP substrate exhibits a good flexibility, and it maintains a high Raman activity after stretching and bending for 100 times. In addition, the surface covering MXene prevents Ag NWs decorated by Ag NPs from oxidation, which made the MAAP substrate still have a relatively high Raman activity. The fabricated MAAP substrate enriches the family members of MXene-based SERS substrates and displays an application value in SERS on irregular surfaces.
Determinación de residualidad de fungicidas benomil y carbendazim en arveja (Phisum sativum) sometida a procesos de conservación
Authors: Osorio Mora Oswaldo , Samper Guerrero Andreina , Lozada Castro Juan Jose , Arturo Perdomo David 
Published: February 2025

Objetivo: Validar una metodología analítica para la determinación de la concentración de los plaguicidas benomil y carbendazim en arvejas frescas y procesadas. Metodología: Se realizó la validación analítica determinando la sensibilidad, precisión y exactitud, utilizando extracción de los compuestos por el método Quechers y análisis por cromatografía liquida de alta eficiencia. Resultados: Los resultados de la validación del método analítico fueron adecuados para la separación, identificación y cuantificación de los plaguicidas carbendazim y benomil. Se determinó un contenido entre 0.004 a 0.560 mg. L-1 de carbendazim. Conclusiones: La concentración de este compuesto en las muestras de arveja enlatada se encuentran dentro de los limites aceptados por el Codex alimentario.
Predicción experimental de cobertura en una red LTE mediante el uso de algoritmos de machine learning
Authors: Herrera Rubio Jorge Enrique , Portilla González German Arley , Osorio Velazco Ana María 
Published: February 2025

Objetivo: Predecir de forma experimental la cobertura de una red Long Term Evolution (LTE) mediante el uso de algoritmos de machine learning. Metodología: La investigación es de tipo descriptiva por el análisis de las causas y factores que influyen en las variables, según el método cuasi-experimental por las mediciones de potencia en condiciones controladas de campo. Se realiza el estudio de las variables físicas que determinar la cobertura en la prestación del servicio de una red móvil mediante el trazado de cuatro rutas; los datos son evaluados, pre procesados y filtrados para probarlos en mediante modelos matemáticos clásicos, luego se aplican los métodos estadísticos de predicción, como también los algoritmos de predicción con la ayuda del aprendizaje automático (ML) para la generación de modelos que categoricen el uso de cada celda dentro de la agrupación, entre los métodos a usar son: estadística descriptiva, Random Forest (RD), cuantificación de densidad, Isolation Forest (IF) y Multivariable Outliers (MO). Posteriormente se realiza la validación cruzada y la predicción del uso de la celda. Resultados: Con los valores obtenidos se establece la correlación entre el comportamiento de los parámetros de potencia y distancia, y con las variables óptimas de cobertura se compara con los modelos tradicionales para una celda estudiada. Conclusiones: El proceso de la integración de técnicas matemáticas y computacionales facilita la toma de decisiones de los ingenieros de radio en el diagnóstico, gestión, planificación y redimensionamiento de redes LTE bajo condiciones en donde las redes se hacen mucho más heterogéneas y los servicios móviles requieren de más recursos de la infraestructura tecnológica.
Feasibility of Polarization Division Multiplexing for Bidirectional Optical Links in 5G Radio over Fiber Cloud Access Networks
Authors: Puerto Leguizamón Gustavo , Suárez Fajardo Carlos Arturo 
Published: February 2025

Objective: To investigate the potential of polarization division multiplexing in a 5G radio over fiber cloud access network to enable bidirectional optical links in the front-haul segment. Methodology: An optically centralized cloud radio access network based on polarization division multiplexing and radio-over-fiber transport is proposed. The exploitation of the polarization domain enables independent optical wavelength channels for the downlink and uplink. The experimental demonstration assesses the feasibility of the radio-over-fiber transport of information in a 5G-cloud radio access network. The demonstration evaluated the Error Vector Magnitude measurements for optical carrier linewidths of 0.1 nm. Data was experimentally measured for QPSK and 64QAM signals onto 3.5 GHz radio frequency across 10 km and 20 km of single mode optical fiber.
Results: The experimental results evaluated the quality of the QPSK and 64QAM signals transported onto a polarization division multiplexing environment for an optically centralized transport in a 5G-cloud radio access network. 64QAM featured an EVM below 6% with a degradation of 2.8% and QPSK presented and EVM below 8% with a degradation of roughly 4.8% with respect to the back-to-back signal across a propagation length of 20 km. Conclusions: The results demonstrated that polarization multiplexing for an optically centralized transport in a 5G-cloud radio access network is feasible. Despite the relatively low optical power received in the uplink, the power penalties of the polarized components did not compromise the power budget so that optical amplification was not included in the measurements. Both QPSK and 64QAM fulfills the requirements of the 3GPP in terms of quality and signal integrity.
Control de gestión para la calidad en una em-presa bancaria a través del rendimiento pro-medio de corrida y el indicador geométrico multivariable utilizando las métricas Seis Sigma
Authors: Fontalvo Herrera Tomas , Calle Ramos Hellen 
Published: February 2025

Objetivo: analizar el control de la gestión de calidad desde perspectivas particulares con el uso de las curvas de operación del rendimiento promedio de corrida (RPC) y el indicador geométrico de capacidad multivariable ) respaldado por el uso de las métricas Seis Sigma. Metodología: Adopta una perspectiva analítica sobre la investigación y propone formas de medir y controlar este sistema. Resultados: Se reveló que el análisis de las curvas de operación RPC permiten conocer la cantidad de servicios necesarios para que un proceso pase de un nivel Z a otro nivel Z, hallando la diferencia del RPC que se obtiene en Z menor y el RPC obtenido en Z mayor para conocer el mejor crecimiento que puede tener el nivel sigma en cada uno de los servicios, mientas que el índice geométrico de capacidad multivariable ) mide el desempeño del servicio de forma integral y general, dando como resultado un valor de 0,92074, lo que indica un desempeño excelente. Conclusiones: al establecer un modelo innovador fundamentado en las curvas de operación de las métricas Seis Sigma, se facilita el control de calidad en cada operación de un servicio gracias a las curvas de operación RPC y la gestión de la calidad global e integral a favor del ), mejorando desempeño de la empresa desde distintas perspectivas.
Instytucja prezydenta w polskim i litewskim prawie konstytucyjnym
Authors: Chmielarz-Grochal Anna , Domańska Aldona , Juškevičiūtė-Vilienė Agnė , Krawczyk Ryszard Paweł , Michalak Anna , Paužaitė-Kulvinskienė Jurgita , Składowski Konrad , Skotnicki Krzysztof , Sułkowski Jarosław , Šinkūnas Haroldas , Vaičaitis Vaidotas A. , Žvaigždinienė Indrė 
Published: February 2025

Prezentowana publikacja, poswięcona instytucji prezydenta w Polsce i na Litwie, jest owocem współpracy nawiązanej przez pracowników Katedry Prawa Konstytucyjnego Uniwersytetu Łódzkiego z pracownikami Katedry Prawa Publicznego Uniwersytetu Wileńskiego. W ramach tego współdziałania ukazały się już dwie monografie: Aktualne problemy polskiego i litewskiego prawa konstytucyjnego, Łódź 2015 oraz Lietuvos ir Lenkijos konstitucines teises aktualijos: Parlamentas (Aktualia litewskiego i polskiego prawa konstytucyjnego: parlament), Vilnius 2016.
Risk Factors of Death in Chronic Obstructive Pulmonary Disease (COPD) Patients at Dr. Soetomo General Academic Hospital, Surabaya, in 2019
Authors: Wedhana Hilmy Indra , Bakhtiar Arief , Kusuma Edward , Rosyid Alfian Nur 
Published: February 2025

Highlights:

The highest distribution of chronic obstructive pulmonary disease (COPD) patients’ age and gender was over 60 years old and males.

The highest distribution of COPD patients’ comorbidity was infection, with pneumonia being the most common infection.

Abstract
Introduction: The distribution of death and risk factors in chronic obstructive pulmonary disease (COPD) patients varies according to disease severity. This study aimed to determine the risk factors of mortality in COPD patients.
Methods: This was a retrospective descriptive study with a total sampling method using inclusion and exclusion criteria. Data collection was performed on patients' medical records throughout 2019. The inclusion criteria for this study sample were patients diagnosed with COPD who died in 2019, aged over 25 years old (adults), both male and female. The exclusion criteria were COPD patients with incomplete medical record data.
Results: The total number of samples obtained and included in this study was 31 COPD patients (n=31). The characteristics of the patients showed a predominance of males over females, with a ratio of 9:1. Seventeen samples (58.0%) out of 31 were patients aged >66 years old. Comorbidities accounted for 96.8% of the study population. The most prevalent comorbidity was infection (77.41%), with pneumonia accounting for 38.7% of all deaths. Eighteen patients (58.1%) reported having two or more comorbidities, whilst 28 patients (90.3%) scored 0-7 on the Modified Sequential Organ Failure Assessment (mSOFA) when admitted to the hospital.
Conclusion: This study found that the group of patients with the mSOFA score of 0-7 with the characteristics of being aged >60 years old, males, and having pneumonia infection had the highest mortality rate among other COPD patients who died.
A Quinoxaline 1,4-Dioxide Activates DNA Repair Systems in <em>Mycobacterium smegmatis</em>: A Transcriptomic Study
Authors: Bekker Olga B. , Galanova Olesya O. , Vatlin Aleksey A. , Frolova Svetlana G. , Shitikov Egor A. , Bespiatykh Dmitry A. A. , Klimina Ksenia M. , Veselovsky Vladimir A. , Ilyasov Rustem A. , Smirnova Svetlana V. , Reznikova Diana A. , Kochetkov Nikita I. , Maslov Dmitry A. , Danilenko Valery N. 
Published: February 2025

In 2022, the World Health Organization reported that tuberculosis (TB) was the second leading cause of death globally from a single infectious agent, following COVID-19. The development of new antitubercular agents with novel mechanisms of action for use in complex TB therapy is considered a key approach to combating TB. In this study, we examined the gene expression profile of M. smegmatis when exposed to a promising antituberculosis agent, quinoxaline 1,4-dioxide (QdNO) 7-chloro-2-(ethoxycarbonyl)-3-methyl-6-(piperazin-1-yl)quinoxaline-1,4-dioxide-1 (LCTA-3368). We investigated how the bacterial response changed with different doses (1/4 × MIC, 1/2 × MIC, and 1 × MIC) and durations (30 minutes and 90 minutes) of treatment with the drug. Our analysis revealed significant upregulation of genes involved in DNA repair and replication processes, as well as changes in the expression of 95 genes encoding proteins with oxidoreductase activity. These findings support the proposed mechanism of antibacterial action of QdNOs, which is associated with the formation of free radicals leading to DNA damage.
Transverse Myelitis in a Patient with Lumbar Stenosis
Authors: Driskill Elizabeth , Wells D. Keith , Lockey Stephen D. 
Published: February 2025

Case:
We present a case of a 78-year-old man with lumbar stenosis who was referred for urgent spine surgery evaluation after the development of progressive bilateral lower extremity numbness and gait disturbance. Additional workup demonstrated thoracic cord edema consistent with a postviral transverse myelitis. He was treated nonoperatively with clinical improvement to his baseline at the final follow-up.

Conclusion:
This case illustrates the importance of maintaining a broad differential diagnosis when patients with lumbar stenosis present with atypical neurologic symptoms. A thorough history, physical examination, and workup can prevent unnecessary spine surgery.