bluuebunny/crossref_metadata_2025 huggingface dataset:
Unequal channel spacing 8×5 Gbps optical system utilizing different signal representations
Authors: Abdulwahid Saif H. , Mahdi Salah
Published: March 2023

Data representations are important to communication networks; they convert the data bits into a signal form, which affects the system capacity, maximum bit rate, transmission distance, and different linear and nonlinear impairments. In this paper, we propose non-return-to-zero (NRZ), chirped NRZ, duobinary, and duobinary return-to-zero (DRZ) data representations with eight dense wavelength division multiplexing channels for transmitting a 5 Gbps data rate through a 250 km fiber length. The results of the simulation design are calculated at different equal and unequal channel spacings, and the quality factor is measured over a wide range of optical power. For equal channel spacing, the DRZ has a preferable performance with a 28.40 quality factor at 18 dBm threshold power, and the chirped NRZ has a preferable performance with a 26.06 quality factor at 12 dBm threshold power. For unequal channel spacing, the DRZ has a 25.76 quality factor at 17 dBm threshold power, and the NRZ has a 25.06 quality factor at 10 dBm threshold power.
Long-distance modal power equalization with hybrid pumped FM-EDFA
Authors: Xu Wenxuan , Pei Li , Wang Jianshuai , Bai Bing , Zheng Jingjing , Li Jing , Ning Tigang , He Ruisi
Published: March 2023

In a few-mode fiber-based mode division multiplexing system, the different modes as distinct channels suffer from discrepant mode-dependent loss, leading to an intensive channel power imbalance and large bit error. The few-mode erbium-doped fiber amplifier (FM-EDFA) enables mode power regulation to ensure high-quality long-distance transmission. In this paper, we propose an FM-EDFA for long-haul equalization with a core and cladding hybrid pump structure. The particle swarm optimization is applied to determine the multilayered erbium ions doping profile. Based on the profile, targeted compensation for high-order modes with high loss is realized to mitigate the power difference in long-distance transmission. Compared with the single pump selection, the differential modal gain reduces from 6.553 dB to 1.239 dB in the hybrid pump with a 1000 km multistage amplification and transmission. We provide new ideas for loss compensation and power balance in long-distance transmission. This method has the ability of dynamic power adjustment while keeping the design simple.
Phase-insensitive amplifier gain estimation at Cramér-Rao bound for two-mode squeezed state of light
Authors: Wang Hailong , Chen Zehua , Fu Zhongxing , Shi Yunpeng , Zhang Xiong , Zhao Chunliu , Jin Shangzhong , Jing Jietai
Published: March 2023

Phase-insensitive amplifiers (PIAs), as a class of important quantum devices, have found significant applications in the subtle manipulation of multiple quantum correlation and multipartite quantum entanglement. Gain is a very important parameter for quantifying the performance of a PIA. Its absolute value can be defined as the ratio of the output light beam power to the input light beam power, while its estimation precision has not been extensively investigated yet. Therefore, in this work, we theoretically study the estimation precision from the vacuum two-mode squeezed state (TMSS), the estimation precision of the coherent state, and the bright TMSS scenario, which has the following two advantages: it has more probe photons than the vacuum TMSS and higher estimation precision than the coherent state. The advantage in terms of estimation precision of the bright TMSS compared with the coherent state is researched. We first simulate the effect of noise from another PIA with gain M on the estimation precision of the bright TMSS, and we find that a scheme in which the PIA is placed in the auxiliary light beam path is more robust than two other schemes. Then, a fictitious beam splitter with transmission T is used to simulate the noise effects of propagation loss and imperfect detection, and the results show that a scheme in which the fictitious beam splitter is placed before the original PIA in the probe light beam path is the most robust. Finally, optimal intensity difference measurement is confirmed to be an accessible experimental technique to saturate estimation precision of the bright TMSS. Therefore, our present study opens a new avenue for quantum metrology based on PIAs.
Scanning mirror based higher order Bessel-gaussian beams integrated in time (HOBBIT) with applications toward the photoacoustic effect
Authors: Keith Miller J. , Free Justin , McCoy Hunter , Johnson Eric G.
Published: March 2023

We demonstrate a new method for the generation of beams with rapidly tunable orbital angular momentum (OAM). This method is based on using a single-axis scanning galvanometer mirror to add a phase tilt on an elliptical Gaussian beam that is then wrapped to a ring using optics that perform a log-polar transformation. This system can switch between modes in the kHz range and use relatively high power with high efficiency. This scanning mirror HOBBIT system was applied to a light/matter interaction application using the photoacoustic effect, with a 10 dB enhancement of the generated acoustics at a glass/water interface.
Orbital angular momentum in the near-field of a fork grating
Authors: Dettlaff Krispin M. , Mavrona Elena , Zolliker Peter , Hack Erwin
Published: March 2023

Light beams with Orbital Angular Momentum (OAM) are explored in applications from microscopy to quantum communication, while the Talbot effect revives in applications from atomic systems to x-ray phase contrast interferometry. We evidence the topological charge of an OAM carrying THz beam in the near-field of a binary amplitude fork-grating by means of the Talbot effect, which we show to persist over several fundamental Talbot lengths. We measure and analyze the evolution of the diffracted beam behind the fork grating in Fourier domain to recover the typical donut-shaped power distribution, and we compare experimental data to simulations. We isolate the inherent phase vortex using the Fourier phase retrieval method. To complement the analysis, we assess the OAM diffraction orders of a fork grating in the far-field using a cylindrical lens.
Image-free single-pixel object detection
Authors: Peng Lintao , Xie Siyu , Qin Tong , Cao Lu , Bian Liheng
Published: March 2023

Recently developed image-free sensing techniques have achieved
remarkable performance in various vision tasks. However, existing
image-free methods still cannot simultaneously obtain the category,
location, and size information of all objects. In this Letter, we
report a novel image-free single-pixel object detection (SPOD)
technique. SPOD enables efficient and robust multi-object detection
directly from a small number of measurements, eliminating the
requirement for complicated image reconstruction. Different from the
conventional full-size pattern sampling method, the reported
small-size optimized pattern sampling method achieves higher
image-free sensing accuracy with fewer pattern parameters (∼1 order of
magnitude). Moreover, instead of simply stacking CNN layers, we design
the SPOD network based on the transformer architecture. It can better
model global features and reinforce the network’s attention to the
targets in the scene, thus improving the object detection performance.
We demonstrate the effectiveness of SPOD on the Voc dataset, which
achieves a detection accuracy of 82.41% mAP at a sampling rate of 5%
with a refresh rate of 63 f.p.s.
Magnetically tunable diffractive optical elements based on ion-irradiated ultrathin ferromagnetic stacks
Authors: Huang Xiaolin , Jiang Siyuan , Wu Biao , Huo Ran , Zhao Xuefeng , Xing Guozhong , Long Shibing , Gao Nan
Published: March 2023

We report a novel type of magnetically tunable diffractive optical element (DOE) based on ultrathin ferromagnetic (FM) Pt/Co stacks. The Pt/Co stacks are irradiated by Ar+ ions at selected areas so that the perpendicular anisotropy is spatially modulated and the DOEs can be tuned by an external magnetic field through the magnetooptical effect. Based on this concept, a diffraction grating and a Fresnel zone plate (FZP) were developed, and complementary experimental results corroborate that a magnetic field can simultaneously manipulate both the zeroth and the first diffraction orders of these DOEs. Importantly, this effect can be utilized to enhance or hide the image formed by the FZP. Our studies pave the way toward developing compact and high-precision DOEs with fast and robust tunability, facilitating various applications spanning a wide spectrum range.
A modified weighted chimp optimization algorithm for training feed-forward neural network
Authors: Atta Eman A. , Ali Ahmed F. , Elshamy Ahmed A.
Published: March 2023

Swarm intelligence algorithms (SI) have an excellent ability to search for the optimal solution and they are applying two mechanisms during the search. The first mechanism is exploration, to explore a vast area in the search space, and when they found a promising area they switch from the exploration to the exploitation mechanism. A good SI algorithm can balance the exploration and the exploitation mechanism. In this paper, we propose a modified version of the chimp optimization algorithm (ChOA) to train a feed-forward neural network (FNN). The proposed algorithm is called a modified weighted chimp optimization algorithm (MWChOA). The main drawback of the standard ChOA and the weighted chimp optimization algorithm (WChOA) is they can be trapped in local optima because most of the solutions update their positions based on the position of the four leader solutions in the population. In the proposed algorithm, we reduced the number of leader solutions from four to three, and we found that reducing the number of leader solutions enhances the search and increases the exploration phase in the proposed algorithm, and avoids trapping in local optima. We test the proposed algorithm on the Eleven dataset and compare it against 16 SI algorithms. The results show that the proposed algorithm can achieve success to train the FNN when compare to the other SI algorithms.
A necrópole romana do sítio da Estrada da Calçada 2 (Beja) - notícia preliminar
Authors: Nunes Tiago , Simão Patrícia
Published: March 2023

O sítio da Estrada da Calçada 2 refere-se a uma necrópole romana, cronologicamente enquadrável no século I d.C. Na referida necrópole identificou-se um pequeno mausoléu em que foi possível observar a existência de dois momentos distintos de utilização, tendo-se observado uma remodelação da estrutura. Na primeira fase de utilização do monumento foram identificados enterramentos de incineração posteriormente colocados em urnas e colocados no interior do mesmo. No interior da câmara foi ainda encontrado um elevado número de unguentários de cerâmica.
El tesorillo de la Casa Norte de Arucci (Aroche, Huelva)
Authors: Medina Nieves , Bermejo Javier , M. Campos Juan
Published: March 2023

La ciudad romana de Arucci se ubica a escasos tres kilómetros del actual núcleo urbano de Aroche (Huelva) y es objeto desde 2004 de investigaciones y puestas en valor por parte del Ayuntamiento de Aroche y la Universidad de Huelva, con el apoyo de la Junta de Andalucía. En 2014 se desarrolló una campaña en la denominada Casa Norte de la ciudad, una domus donde fue documentado un tesorillo compuesto por 376 denarios del siglo I-II d.C., de los cuales 375 pertenecen a la Dinastía de los Antoninos y sólo una es emitida con anterioridad por Domiciano. Dentro de este atesoramiento destaca un mayor numerario en época de Adriano. Más que un ahorro, el atesoramiento de Arucci parece responder a una selección o colección de monedas.
Caracterización y usos de los molinos rotatorios romanos en las cetariae del Estrecho de Gibraltar
Authors: Pascual Sánchez María Ángeles
Published: March 2023

Se presenta un avance del estudio de algunos molinos rotatorios romanos documentados en ambientes haliéuticos del área del estrecho de Gibraltar, así como los resultados obtenidos a partir del muestreo de la superficie activa de los molinos. Gracias a la aplicación de diferentes técnicas arqueométricas, los análisis han deparado el hallazgo de elementos de diferente naturaleza, mayoritariamente ictiofauna.
La torre emiral de Idanha-a-Velha
Authors: Malalana Ureña Antonio , Morín de Pablos Jorge
Published: March 2023

La literatura científica publicada hasta la fecha cataloga la torre de Idanha-a-Velha como templaria. Habitualmente, se ha utilizado como referencia documental una inscripción, fechada a mediados del siglo XIII y ubicada en el arco del acceso en altura. Sin embargo, otra serie de datos, fundamentalmente arqueológicos, nos ha llevado a plantear una hipótesis yuxtapuesta: dicha torre habría sido erigida a lo largo de los siglos IX-X. En los últimos años, un equipo multidisciplinar ha formalizado una revisión crítica de la literatura científica –bibliografía y literatura gris- y ha puesto en marcha un conjunto de métodos arqueológicos no invasivos. A partir de aquí, hemos querido replantear la lectura del edificio, principalmente de sus paramentos. Desde este instante, el planteamiento de la investigación se centraría en contextualizar correctamente este ejemplo singular de la arquitectura militar medieval. Los datos resultantes han supuesto un giro importante para la historia local.
Huerta de la Fresa: un asentamiento bajomedieval y moderno en el entorno rural de Aljaraque (Huelva)
Authors: Campos Jara Pedro
Published: March 2023

En este trabajo se presentan los resultados de la excavación arqueológica de una casa de épocas Bajomedieval y Moderna situada en un contexto rural en el municipio de Aljaraque (Huelva). Una valoración general del espacio y técnica constructiva de la casa nos lleva a considerar que ésta tuvo una fundación bajomedieval, posiblemente en el siglo XIV, permaneciendo habitada hasta mediados de la decimosexta centuria de la Edad Moderna, en que se abandonó. La cerámica documentada presenta una convivencia entre la tradición islámica bajomedieval, bien conocida en yacimientos próximos como Shaltish/Saltés, y la Loza Morisca (mayólica) característica de la Edad Moderna andaluza. De éstas se han localizado un conjunto muy homogéneo de piezas que se datan desde inicios del siglo XV hasta mediados del siglo XVI.
OS FATORES QUE ACARRETAM A SATISFAÇÃO OU INSATISFAÇÃO DOS USUÁRIOS DE CADEIRA DE RODAS MANUAL QUANTO AO RECURSO E AO SERVIÇO
Authors: Zart Luiz Henrique , Hermes Chesani Fabíola
Published: March 2023

Este trabalho teve como objetivocompreender os fatores que acarretam a satisfação ou insatisfação dos usuários de cadeira de rodas manual, quanto ao recurso e ao serviço. A pesquisa foi do tipo exploratória, descritiva e qualitativa. Os participantes da pesquisa foram as pessoas com deficiência física que utilizam a cadeira de rodas manual, residentes na cidade de Itajaí e na região do Vale do Itajaí, Santa Catarina. O instrumento de coleta de dados foi a entrevista semiestruturada que aconteceu na Clínica de Fisioterapia da Univali e no Centro Especializado em Reabilitação II (CERII). Participaram da pesquisa um total de dez usuários de cadeiras de rodas manuais. As categorias que emergiram foram: aspectos relacionados à satisfação e à insatisfação do uso da CRM e aspectos quanto aos serviços prestados aos usuários de CRM. Os participantes da pesquisa relataram que estão satisfeitos com suas cadeiras, quanto às dimensões e insatisfeitos quanto ao peso da cadeira, estável, que acarreta dor nas costas e nos braços. Quanto ao serviço especializado estão insatisfeitos quanto ao conserto de cadeira de rodas, a falta de profissionais da saúde para orientar e escolher sobre o uso da CRM e a falta de acessibilidade.
Structure Formation Processes During Explosive Welding of Copper and Molybdenum: A Research Study
Authors: Shalaev P.O. , Kveglis L.I. , Noskov F.M. , Fadeev T.V.
Published: March 2023

The present study investigates samples of Cu-Mo composite material produced through explosive welding. The microhardness of these samples is measured and their structures are analyzed using optical and electron microscopy methods. Copper and molybdenum regions are mapped at the Cu-Mo boundary. The analysis reveals a complex fractal line and dark areas at this boundary, indicating the formation of a new phase.

Microhardness measurements indicate that the hardness of both copper and molybdenum increases in comparison to standard values for annealed samples of copper and molybdenum, respectively. Furthermore, the hardness of molybdenum increases at the interface with copper, which may also suggest the formation of a new phase.

The electron microscopy analysis and mapping of copper and molybdenum regions at the Cu-Mo interface confirm the presence of a new phase, which is referred to as "forced eutectic." This is because copper and molybdenum do not typically form solid solutions, eutectics, or intermetallic compounds under equilibrium conditions. The new phase exists only under nonequilibrium conditions.
Assessing Probability Characteristics of Reservoir Operation Using Bayesian Technology
Authors: Ilinich V.V. , Perminov A.V. , Gavrilovskaya N.V.
Published: March 2023

This study explores the use of Bayes' theorem to determine the probability characteristics of reservoir operation, specifically in cases where the reservoir capacity is exceeded or sustained within its active storage capacity. The investigation focuses on moments of streamflow increase during the spring flood and water shortage in the fall. The study aims to develop methods for regulating reservoir runoff using Bayesian technology, with specific tasks including developing a calculation algorithm to estimate the probabilistic characteristics of reservoir operation based on the Bayes formula with a seasonal division of the water management year, identi-fying the necessary probabilistic characteristics of reservoir filling and water recovery, and solving the inverse problem using the Bayes formula to determine the required initial filling at given values of the reservoir filling and its probability by the end of the calculated time interval. The study's relevance is rooted in the need to determine the probability characteristics of reservoir filling and water discharge to consumers during streamflow regulation.
A designmódszerek mint innovációs katalizátorok alkalmazása a szállodákban
Authors: Juhász-Dóra Katalin , Ilyés Noémi
Published: March 2023

Az üzleti környezet sohasem stagnál, csakis a benne lévő változás állandó. A szálláshelypiacon zajló folyamatos változás olykor bizonytalan piaci helyzetet teremt, és arra kényszeríti a szállodavállalatokat, hogy a változó feltételekhez alkalmazkodva gondolják újra üzleti modelljeiket, működési folyamataikat, a kínált termékeik és szolgáltatásaik körét. A szállodavállalatok a legtöbb esetben új gyakorlatok alkalmazásával, technológiai vagy nem technológiai innováció bevezetésével reagálnak a megváltozott fogyasztói igényekre. A hosszútávon sikeres üzemeltetéshez azonban nem elegendő kizárólag a vendégelvárásoknak eleget tenni, a szálláshelypiac lokális és globális kihívásaira is választ kell adni a megváltozott feltételrendszereknek megfelelően. Jelen tanulmány célja a Design Thinking és a Service Design mint innovációs katalizátorok alkalmazási lehetőségeinek bemutatása a szállodaipar példáján keresztül.
A fenntarthatóság szempontjainak megjelenése a hazai turisztikai célú fejlesztési programokban
Authors: Nemes Nikoletta , Happ Éva
Published: March 2023

A fenntarthatóság mint szemléletmód a turisztikai fejlesztések területén is kikerülhetetlen tényezővé vált napjainkban. Az állami irányítás, a szolgáltatók és rajtuk keresztül a fogyasztók felelősségteljes részvétele ma már alapkövetelmény. A hazai turisztikai célú fejlesztések forrása döntően támogatás, amelyek zöme az elmúlt két évtizedben az uniós forrásokhoz köthető. A tanulmány a fenntarthatóság szempontrendszerének érvényesítését vizsgálja az uniós csatlakozás óta eltelt három programozási időszak turisztikai célú fejlesztési programjainak és felhívásainak értékelési szempontjaira vonatkozóan, illetve az indikátorok és monitoringmutatók területén. A kutatás eredményeként megállapításra került, hogy bár a fenntarthatósággal kapcsolatos alapelvek az érintettek körében egyre inkább az általános ismeretek részét képezik, érvényesítésük és érvényesülésük egyelőre kevésbé valósul meg. A négy fő területből leginkább a társadalmi-kulturális és a környezeti fenntarthatóságot támogató tevékenységek jelennek meg, azonban ezeknél is hiányzik a hosszútávú ösztönző- és monitoringrendszer. A gazdasági fenntarthatóság és a tudatos tervezést elősegítő desztinációmenedzsment-tevékenység csak nagyon ritkán jelenik meg a felhívásokban.
Caracterização morfométrica de feições doliniformes na Planície do Araguaia
Authors: Manchola Oscar Eduardo Paez , Morais Fernando de
Published: March 2023

A Planície do Araguaia apresenta extensas áreas de savanas com dispersos fragmentos florestais localizados sobre depressões circulares. Estas feições além de servirem como importantes corredores ecológicos, poderiam estar associadas a formações cársticas do tipo dolinas, estruturas fechadas de conexão das águas superficiais e subterrâneas. Para identificar esta relação e contribuir o entendimento da sua gênese, este estudo tem como objetivo principal o mapeamento e análise morfométrica de feições doliniformes na Planície do Araguaia. Por meio da caracterização geoambiental da área de estudo; modelos de elevação digital – SRTM; interpretação de imagens do satélite Sentinel 2-A do período de 2019 a 2020; e cálculo das variáveis morfométricas: área, perímetro, declividade, altitude, coeficiente de alongamento, índice de circularidade e densidade de Kernel. Foram identificadas 24.023 feições doliniformes associadas à vegetação verde/sadia em área de abrangência de 114.900 km², concentradas majoritariamente nos municípios de Lagoa da Confusão – TO, Pium – TO e Cocalinho – MT. As feições apresentaram áreas de até 10 km², índices de circularidade superiores a 0,5 e coeficientes de alongamento entre 1 e 1,5, indicando uma predominância de formas circulares em declividades de até 3% na orientação NE. Com base nos resultados, pode-se inferir que estas feições apresentam formas de dolinas, as quais podem estar sob influência de controles estruturais e associadas a processos cársticos, denotando em alguns lugares a existência de um carste encoberto.
Experimental Study and Analysis of Fretting Wear and its Influence on Functionality of Mechanical Components
Authors: Ramaswamy Jyothilakshmi , Lokesha Nandeesha Hosanagara , Swamy Deepak
Published: March 2023

Fretting occurs when there is tangentially low-amplitude vibrational motion (range tens of nanometres to tens of micrometers) between nominally stationary contact surfaces. This is a common occurrence as most machines are exposed to vibration both in transit and in operation. Contacts that appear to have no relative movement, such as press-fit, can actually slide on a scale of 1 μm with alternating pendulum loads. It is very difficult to eliminate such movements and the resulting friction. Fretting wear and frictional fatigue occur on almost every machine and otherwise cause a total failure of robust components. Studies have shown that, in contrast to other forms of wear, the frequency of machine fit problems has not diminished in the last few decades. Experiments were conducted on a fretting wear testing machine of amplitude range 10–200 μm, frequency range 4–120 Hz and surface roughness were recorded for both polished and unpolished condition. The correlation was made between changing parameters and variation in surface roughness. Friction fatigue is an important but almost unknown factor when load-bearing components are damaged at very low loads. Therefore, we will conduct an experimental study of fretting and its control parameters. For unpolished specimen, the variation of amplitude with respect to the coefficient of friction (COF) increases to 0.5, then it becomes linear. For semi-polished specimen, it increases to COF 0.45 and then it starts decreasing. For a fully polished specimen, there is no change in COF to 75 μm and then it starts increasing. According to the experimental data, for all specimens’ COF constantly decrease with increasing the load.
A critical examination of policies and practices impacting the education of unaccompanied immigrant children in the United States
Authors: López Ruth M. , Giraldo-Santiago Natalia
Published: March 2023

Beginning in 2014, increasing numbers of unaccompanied immigrant children (UIC) arrived and were apprehended at the United States-Mexico border. These children were fleeing violence, poverty, environmental disasters, as well as state-sanctioned violence and political instability influenced by interventions and support from the U.S. government spanning several decades. The purpose of this article was to examine the factors that shape the educational experiences of UIC in the United States during and after detention. The following questions guided this analysis: (1) What policies and practices impact the education of apprehended UIC in the United States? (2) What are the conditions formerly apprehended UIC encounter in schools? A review of the literature between 2000 and 2022 was conducted, including peer-reviewed articles, commentaries, legal documents, and news articles. The literature raises concerns about the quality, effectiveness, and availability of academic resources for these children. This review demonstrates the need for additional research and policy changes aimed at improving the educational conditions of UIC in shelters and communities after reunification, and it offers recommendations to school districts, policymakers, and researchers on how to best address the academic and non-academic needs of formerly apprehended UIC in the United States.
An empirical study on the examination of individual innovativeness levels of civil aviation academicians
Authors: Dursun Erdal
Published: March 2023

Research aim/problem: The civil aviation sector is a sector where high technology is used. Academics working in educational institutions that teach employees for this industry should be open to new ideas. The "Individual Innovation Scale" was employed in the study to measure the levels of innovativeness of civil aviation academics. The study was formed using a survey model. The research universe includes 440 civil aviation academicians. Among the random sample methods employed in the study was the accessible sampling approach. The study sample group comprises of 67 academics, 22 females and 45 males, who volunteered to take part in the research. Civil aviation academics, it can be argued, are prone to individual innovative traits, are open to experience and eager to attempt innovation, do not reject change, and have a high degree of engagement in thinking on this subject. Furthermore, significant differences were determined for the academic title variable "Resistance to Change" in the dimension of "Resistance to Change" according to the gender variable of the factors of individual innovativeness; according to the seniority variable, in the dimension of "Thought Leadership".
Obrazy etniczne jako reprezentanci kodu religijnego w powieści Wasyla Machny "Kalendarz wieczności"
Authors: Demchuk Olha
Published: March 2023

Artykuł analizuje obrazy etniczne powieści Wasyla Machny Kalendarz wieczności z zastosowaniem dominującej metody imagologicznej. W pracy skupiono uwagę na problematyce interakcji między własnym a cudzym w ramach prezentowanych w tekście toposów, istotnych w dobie procesów globalizacyjnych. Głównym zadaniem wywiadu naukowego jest badanie obrazów religijnych, które tworzą pewien kod archetypowy w reprezentacji każdego etnotypu. W opracowaniu prześledzono również rolę i funkcje kodu religijnego w wyobraźni autora, cechy geokolturowego i dekoracyjnego imago obrazów etnicznych. W trakcie badania wzięto pod uwagę kontekst etnokulturowego pogranicza jako przestrzeni funkcjowania wielu obcych sobie narodów, granice kulturowe, które w pewnej mierze zostały wyrównane w świetle historycznego i politycznego tła rozwoju wydarzeń powieści Kalendarz wieczności. W wywiadzie przeanalizowano także interakcje wizerunku Ukraińców z heteroobrazami Ormian, Żydów, Polaków i Osmanów w aspekcie religijnym na pograniczu polifonicznym. Udowodniono, że motywem przewodnim powieści Wasyla Machny jest niewidzialna ideologiczna konfrontacja między przedstawicielami określonych wyznań, co najdobitniej zarysowuje się w apokaliptycznych kodach eposu o Mesjaszu.
"Słowo o prawie i łasce" metropolity Iłariona: podłoże retoryczne i poetyckie
Authors: Czapla Olha
Published: March 2023

Ponowne odczytanie pierwszego datowanego dzieła literatury ukraińskiej w czasie wojny rosyjsko-ukraińskiej jest szczególnie cenne, albowiem dowodzi naszej siły. Zwrócenie uwagi na sposoby zaspokajania istotnych potrzeb społecznych sprzed tysiąca lat pozwala na odnalezienie paraleli z nowoczesnymi wypowiedziami publicznymi i praktykami retorycznymi w sferze polityki, co sprawia, że badanie takie ma istotne znaczenie. Główny problem naukowy uwypuklony w niniejszym artykule dotyczy korelacji retoryki (sztuka wystąpień publicznych) i poetyki (system zasad twórczych autora lub epoki) w analizie Słowa o prawie i łasce, za autora którego uważany jest metropolita kijowski Iłarion. Celem studium jest zatem wskazanie źródeł, do których należy sięgać w celu zgłębienia poetyki i retoryki Słowa jako dzieła średniowiecznego. Retoryczne i poetyckie komponenty Słowa pochodzą z tradycji judeochrześcijańskiej, z ich wpływami antycznymi, wzbogacone oratorium bizantyjskim, najściślej związane z kaznodziejstwem ewangelicznym i kijowsko-ruską tradycją liturgiczną.
Oryginalność badań twórczości Ołesia Ulianenki w monografii Feliksa Szteinbuka
Authors: Horniatko-Szumiłowicz Anna
Published: March 2023

Druga część monografii Pod „Znakiem Sabaota” albo „Tam, gdzie…” Ulianenko to gruntowna kontynuacja studium twórczości ukraińskiego pisarza Ołesia Ulianenki (1962–2010) autorstwa Feliksa Szteinbuka. Ulianenkoznawca z Bratysławy powziął zamiar jak najrzetelniej odzwier- ciedlić istotę i cel pisarstwa Ulianenki, dla którego prawdziwym i jedynym przedmiotem rozważań stał się człowiek i jego dusza. Oryginalne dociekania wytrawnego badacza proponują alternatywne względem tradycyjnych historycznoliterackich interpretacji egzegetyczne odczytanie prozatorskiej spuścizny Ulianenki. Książka, która zgodnie z obietnicą jej autora, zawiera najpełniejszą, dogłębną i oryginalną analizę twórczości prozaika, a jednocześnie stanowi podstawę do dalszych fundamen- talnych badań nad spuścizną literacką pisarza z pewnością zasługuje na należyte docenienie zarówno ze strony krytyki literackiej, jak również szerokiego grona czytelników.
An effective method for real-time estimation of slope stability with numerical back analysis based on particle swarm optimization
Authors: Zou Jiaqiang , Chen Hao , Jiang Yu , Zhang Wei , Liu Aihua
Published: March 2023

The purpose of this article is to provide an effective approach to evaluate slope stability in real-time in a reservoir area, which is significant for carrying out risk management for landslide disaster prevention in various engineering practices. A comprehensive idea for stability estimation of bank slope under the influence of rainfall or the reservoir water level is presented in this work. Slope stability analysis and back analysis of soil parameters are both included based on numerical simulation. The mechanical parameters of the bank slope were first back-analyzed using particle swarm optimization (PSO), and real-time stability analysis with high accuracy and efficiency was then established based on multiple continuously monitored displacements. Two case studies were carried out in this study. The results show that (1) based on the real-time monitored displacement and numerical simulation, the mechanical parameters of the slope can be reasonably retrieved through PSO; and (2) based on the inverse mechanical parameters, the safety factors of the slope can be numerically obtained, so that the real-time estimation of slope stability can be realized.
Elements of Country: a First Nations-first approach to chemistry
Authors: Masters Anthony , Greenfield Peta , Davison Cameron , Evans Janelle G. , Motion Alice , Barrett Jennifer , Troy Jakelin , Constantine Kate , Jackson Pulver Lisa Rae
Published: March 2023

Collectively, we have chosen to explore an Australian First Nations-first approach to understanding the chemical elements. We believe that engagement with cultural heritage, ongoing cultures, and the knowledges ofthis place—the lands on which we work, live, and study—will lead to new ways of understanding the elements and change the way we practice chemistry. The “First Nations first” phrase and approach comes from understanding the unique place that Aboriginal and Torres Strait Islander peoples have in the Australian context. In this paper we explore how a First Nations-first approach could take place in Sydney on Aboriginal lands. This approach is led by Aboriginal people, engages with culture, and is produced with local knowledge holders. So far, the work has entailed two years of meeting, conversing, and sharing space to determine appropriate ways of working together, interrogating the complexities of the ideas, and to refining our approach to the work. To appreciate the significant shift that a First Nations-first approach represents for chemistry, we consider the legacy of the Periodic Table. We share some reflections on how Indigenous knowledges can contribute to an expanded chemistry curriculum through the recognition of productive cultural tension.
Family Firm Research Frontier
Authors: Danes Sharon M. , Zachary Ramona Kay , Balabram Elisa
Published: March 2023

The future study of the family firm calls for in-depth, precise conceptualizations, as well as multidisciplinary methodologies. The family firm is presented herein as a suprasystem that offers a full recognition and representation of its organizational and relational realities. Future family firm research must embrace these conceptualizations and build an unbiased parallel research suprasystem that enhances future research studies through demonstrating the interconnectedness and interdependentness of family, business, and family/business interface subsystems. Doing so will move the family firm and entrepreneurship disciplines toward creating a path to achieving a deeper and wider understanding of how family firm suprasystems emerge, develop, and sustain themselves overtime. Future researchers can meet these challenging opportunities with appropriate conceptualizations and methodologies.
Generalized Cauchy–Riemann equations in non-identity bases with application to the algebrizability of vector fields
Authors: Avila Julio Cesar , Frías-Armenta Martín Eduardo , López-González Elifalet
Published: March 2023

We complete the work done by James A. Ward in the mid-twentieth century on a system of partial differential equations that defines an algebra

𝔸

{\mathbb{A}}

for which this system is the generalized Cauchy–Riemann equations for the derivative introduced by Sheffers at the end of the nineteenth century with respect to

𝔸

{\mathbb{A}}

, which is also known as the Lorch derivative with respect to

𝔸

{\mathbb{A}}

, and recently simply called

𝔸

{\mathbb{A}}

-differentiability. We get a characterization of finite-dimensional algebras, which are associative commutative with unity.
The second cohomology spaces of 𝒦(1) with coefficients in the superspace of weighted densities and deformations of the superspace of symbols on S
1|1
Authors: Agrebaoui Boujemaâ , Basdouri Imed , Boujelben Maha
Published: March 2023

We explicitly describe the second cohomology of the Lie
superalgebra

𝒦
⁢

(
1
)

{\mathcal{K}(1)}

of contact vector fields on the
supercircle

S

1
|
1

{S^{1|1}}

with coefficients in the spaces of weighted
densities. We deduce the second cohomology of

𝒦
⁢

(
1
)

{\mathcal{K}(1)}

with coefficients in the Poisson algebra of pseudodifferential
symbols on

S

1
|
1

{S^{1|1}}

. We study formal deformations of the standard
embedding of

𝒦
⁢

(
1
)

{\mathcal{K}(1)}

into the Poisson superalgebra of
pseudodifferential symbols.
“Insistent as anesthetic”: difficult similes subserving the poetic context
Authors: Tartakovsky Roi , Shen Yeshayahu
Published: March 2023

Previous research has identified a type of nonstandard simile in which the ground is a non-salient feature of the source term (for example, the nonstandard hard as a lamp as opposed to the standard hard as a rock), and found this type to be common in poetry and much rarer in non-poetic discourse. Since these nonstandard similes entail a fundamental semantic breach and violation of a basic convention of the simile, how can their existence be explained? Here we claim that it is the poetic context itself, the poem within which these similes appear, which is the key to explaining their existence and their unique advantage. Through a series of poetic examples, including poems by Plath, Lee, and Rukeyser, we show how the semantic difficulty of the nonstandard simile serves the poem and fulfils various functions within it.
The efficient employment of the space division multiplexing technique with OADMs for more flexibility and scalability in optical systems
Authors: Rashed Ahmed Nabih Zaki , Ramkumar Govindaraj , Srinivasan Maratta Lakshmi Narasimman , Muppala Chiranjeevi , Ahammad Shaik Hasane , Hossain Md. Amzad
Published: March 2023

The optical add drop multiplexers (OADMs) to be modeled and analyzed depends up on the simulation variables are demonstrated. Transmitted power per channel variations are studied against both fiber length and number of transmitted channels at receiver bandwidth of 40 GHz and temperature of 25 °C. Received power from each channel variations are demonstrated against both fiber length and number of transmitted channels at receiver bandwidth of 40 GHz and temperature of 25 °C. The bit error rate variations are clarified against both fiber length and number of transmitted channels at receiver bandwidth of 40 GHz and temperature of 25 °C. The optical link map through fiber cable core is clarified. Total pulse broadening variations are illustrated against both fiber length and number of transmitted channels at receiver bandwidth of 40 GHz and temperature of 25 °C. The lighted signal/noise ratio variations are demonstrated against both receiver bandwidth and number of transmitted channels at transmission distance of 200 km and temperature of 25 °C. Channel capacity variations are also demonstrated against both receiver bandwidth and number of transmitted channels at transmission distance of 200 km and temperature of 25 °C.
Impact of omicron wave and associated control measures in Shanghai on health management and psychosocial well-being of patients with chronic conditions
Authors: Xu Zhimin , de Melo Ghisi Gabriela Lima , Liu Xia , Cui Lixian , Grace Sherry L.
Published: March 2023

The objective of this cross-sectional study was to investigate health management, well-being, and pandemic-related perspectives of chronic disease patients in the context of stringent measures, and associated correlates. A self-report survey was administered during the Omicron wave lockdown in Shanghai, China. Items from the Somatic Symptom Scale (SSS) and Symptom Checklist-90 were administered, as well as pandemic-related items. Overall, 1,775 patients (mostly married females with hypertension) were recruited through a community family physician group. Mean SSS scores were 36.1 ± 10.5/80, with 41.5% scoring in the elevated range (i.e., >36). In an adjusted model, being female, diagnosis of coronary artery disease and arrhythmia, perceived impact of pandemic on life, health condition, change to exercise routine, tolerance of control measures, as well as perception of future and control measures were significantly associated with greater distress. One-quarter perceived the pandemic had a permanent impact on their life, and 44.1% perceived at least a minor impact. One-third discontinued exercise due to the pandemic. While 47.6% stocked up on their medications before the lockdown, their supply was only enough for two weeks; 17.5% of participants discontinued use. Chief among their fears were inability to access healthcare (83.2%), and what they stated they most needed to manage their condition was medication access (65.6%). Since 2020 when we assessed a similar cohort, distress and perceived impact of the pandemic have worsened. Greater access to cardiac rehabilitation in China could address these issues.
Consumers’ attitudes toward refrigerated ready-to-eat meat and dairy foods
Authors: Gonçalves João Carlos , Guiné Raquel P. F. , Djekic Ilija , Smigic Nada
Published: March 2023

The constant variation of people’s lifestyle has been linked to changes in people’s eating habits. The consumption of ready-to-eat (RTE) food products, such as fresh vegetables, salads, dairy, pre-cooked meat, or pre-cooked meals, has increased in all western countries. This study aims at characterization of the Portuguese consumers’ attitude toward chilled RTE meat and dairy foods consumption. The study was performed using a questionnaire survey disclosed through an internet platform. The sample consisted of 350 individuals, who voluntarily answered the questionnaire. The survey included questions to characterize the Portuguese purchase and food safety attitudes related to dairy and meat RTE food products. The questionnaire also included questions for the sociodemographic characterization of the sample involved. According to the results, it is not clear to the customers as which is the safer refrigerated RTE food selling format, pre-packed or foods on request. The participants consider refrigerated RTE dairy and meat food products safer when purchased at the delicatessen department in the supermarket than those purchased at open markets or bazaars. With respect to the customers’ habits, they usually purchase RTE dairy or meat food products mainly from the supermarket, and in pre-packed format. Globally, the results reveal that Portuguese consumers are conscious and follow assertive attitudes toward food safety, contributing to maintain the refrigerated food chain, even when they take the product home.
Transferrin receptor is necessary for proper oligodendrocyte iron homeostasis and development
Authors: Cheli VT , Santiago González DA , Wan R , Rosenblum SL , Denaroso GE , Angeliu CG , Smith Z , Wang C , Paez PM
Published: March 2023

To test the hypothesis that the transferrin (Tf) cycle has unique importance for oligodendrocyte development and function, we disrupted the expression of the Tf receptor (Tfr) gene in oligodendrocyte progenitor cells (OPCs) on mice of either sex using theCre/loxsystem. This ablation results in the elimination of iron incorporation via the Tf cycle but leaves other Tf functions intact. Mice lacking Tfr, specifically in NG2 or Sox10-positive OPCs, developed a hypomyelination phenotype. Both OPCs differentiation and myelination were affected, and Tfr deletion resulted in impaired OPC iron absorption. Specifically, the brains of Tfr cKO animals presented a reduction in the quantity of myelinated axons, as well as fewer mature oligodendrocytes. In contrast, the ablation of Tfr in adult mice affected neither mature oligodendrocytes nor myelin synthesis. RNA-seq analysis performed in Tfr cKO OPCs revealed misregulated genes involved in OPC maturation, myelination, and mitochondrial activity. Tfr deletion in cortical OPCs also disrupted the activity of the mTORC1 signaling pathway, epigenetic mechanisms critical for gene transcription and the expression of structural mitochondrial genes. RNA-seq studies were additionally conducted in OPCs in which iron storage was disrupted by deleting the ferritin heavy chain. These OPCs display abnormal regulation of genes associated with iron transport, antioxidant activity, and mitochondrial activity. Thus, our results indicate that the Tf cycle is central for iron homeostasis in OPCs during postnatal development and suggest that both iron uptake via Tfr and iron storage in ferritin are critical for energy production, mitochondrial activity, and maturation of postnatal OPCs.

SIGNIFICANCE STATEMENT:

By knocking-out transferrin receptor (Tfr) specifically in oligodendrocyte progenitor cells (OPCs) we have established that iron incorporation via the Tf cycle is key for OPC iron homeostasis and for the normal function of these cells during the postnatal development of the CNS. Moreover, RNA-seq analysis indicated that both Tfr iron uptake and ferritin iron storage are critical for proper OPC mitochondrial activity, energy production, and maturation.
Exploring Energy Distribution in Ecosystems by Integrating a Classroom-Level Biological Survey
Authors: Kidd Aaron E. , Sobotka Alex J. , Janney Benjamin A.
Published: March 2023

Energy and biomass distribution in the ecological sciences have long been approximated by complex, often idealized scientific models. When utilized appropriately, these models are powerful tools for students, who must organize evidence and make data-driven predictions surrounding trophic level interactions. However, the abstract nature of ecological models can present a significant challenge to students who generally require concrete experiences to make sense of complex scientific ideas. Inquiry-centered field experiences serve to bypass this barrier, providing much-needed context by leveraging student data to develop a deep conceptual understanding of foundational ecological principles.
The Hazards of Daily Stressors: Comparing the Experiences of Sexual and Gender Minority Young Adults to Cisgender Heterosexual Young Adults During the COVID-19 Pandemic
Authors: Lougheed Jessica P. , Keskin Gizem , Morgan Sean
Published: March 2023

Some individuals may be at greater risk for encountering stressors in daily life than others, especially those with minority identities. Initial evidence shows that the disparities between cisgender heterosexual (CH) individuals and sexual and gender minority (SGM) individuals on stress-related experiences may be exacerbated by the COVID-19 pandemic. We examined the daily stressors experienced by undergraduate students during the COVID-19 pandemic (stressor exposure), the association between the experience of daily stress and same-day negative mood (stressor reactivity), and whether these varied between undergraduate students with SGM identities and their CH counterparts using a 14-day daily diary design. We did not find significant differences between SGM and CH groups on stressor exposure or stressor reactivity. One common feature of daily diary data is right censoring, which is when some individuals do not experience specific events during the study duration. We used multilevel survival analysis, which accounts for right censored data, to examine group differences in the risks of stressor exposure. We discuss the statistical issues involved when right-censored cases are not taken into consideration in studies of stressor exposure and propose multilevel survival analysis as one solution to move the field towards more accurately understanding whether, when, and why SGM individuals are at greater risk for stressors.
Democratic Nostalgia
Authors: Zielonka Jan
Published: March 2023

The reviewed books nicely expose several factors behind democratic “degeneration,” but they do not question the assumption that democracy is a matter for nation-states only. This is problematic because states’ ability to perform their traditional functions has been progressively eroded. The internet revolution, in particular, has accelerated social communication, economic transactions, and the process of unbounding with profound implications for democratic performance. Rather than cultivating nostalgia for the “glorious years” of democracy, we must think hard how to make democracy triumph in the digital era.