bluuebunny/crossref_metadata_2025 huggingface dataset:
The Vacuum as Imaginary Space. The Unreasonable Effectiveness of Complex Numbers
Authors: Minati Gianfranco
Published: February 2023

The background to the article is the classic and quantum understandings of the vacuum and the use of imaginary numbers in quantum models. The purpose of the article is to outline the possible understanding of the vacuum as imaginary space always coupled with the real space in the complex space of complex numbers. This understanding relates to the duality real-potential, collapsed–collapsible, and superimpositions of waves-phenomena as in quantum mechanics. The incomputability of the imaginary parts may represent the physical meaning of the permanent potential pending nature of the vacuum. The presence of imaginary numbers in models may be intended as warranty that it is not possible to compute definitive results, but it is possible to have pending multiple equivalences and superimpositions as in quantum physics and emergent collective processes in complexity. We consider how much the complexity (i.e., the study of emergence and chaos) may be considered related to and represented by complex numbers (i.e., properties of their dual variables and their collapsibility in real numbers). The usage of imaginary numbers may also be intended as the expression or manifestation of something we do not understand yet, as it was for the indemonstrability of the fifth Euclidian postulate and the unavailability of a distribution law for prime numbers. We conclude that a new global understanding is necessary and capable of explaining what we understand as the unreasonable effectiveness of complex numbers.
Aerodynamic Study and Design of Fixed Wing and Multi-copter Combination
Authors: Alhammadi Mohamed , Alavi Mohammed , Alameri Ali , Bin Dol Sharul Sham
Published: February 2023

This project aims to design a hybrid drone with fixed wing for the stable cruising as well as multi-copters for the vertical take-off and landing (VTOL) operations. Drones are utilized for number of applications leading from transportation to the surveillance purposes. Some drones are popular for their stable operation, while other for optimum landing and takeoff. Therefore, numerical analysis was performed on propeller, landing gear as well as on whole structure of the drone. The observed result from CFD analysis show that the velocity distribution had maximum velocity of 40 m/s at the mid span of the drone. In addition, the maximum stress obtained was on the landing gear with approximate value of 185 MPa which is due to the weigh and payload of the drone. The final model was built after the analytical and numerical analysis in order to achieve sustainable and reliable prototype.
Adaptive Linearizing Control with MRAC Regulator for DC-DC Boost Converter
Authors: Chouya Ahmed
Published: February 2023

In this paper; we treat the converter boost DC-DC by an adaptive linearizing controller. Where regulators located at the feed forward and feedback. Small signal model is used as a linearizing technique. Massachusetts Institute of Technology (MIT) rule is applied as an adaptive mechanism to determine the optimal control parameters in some conditions. The used adaptive control technique is Model Reference Adaptive Control (MRAC), this method as able to control system in various output voltage. The proposed method has a stable response and able to reach the model reference smoothly. However, the response of the system has instantaneously overshoot and follows the response back of model reference.
Stress Distribution by Improved Designs of Obturator Frameworks Using Photo-elastic Resin Models. In Vitro Study
Authors: Al-Samawi Laith Mahmoud Abdulhadi , Daboul Amro
Published: February 2023

Obturator is a prosthetic appliance that is used to restore irreparable maxillary defects. The frames were supposed to form the infrastructure of the obturator that intends to close the maxillary arch defects. Five main types of maxillary defects according to Aramany classification were selected for this study. 15 different design frameworks were fabricated using Co-Cr dental alloy. The defects were simulated using premade maxillary arch models that were reproduced in photo-elastic resin. The fabricated metal frames were seated on the photo-elastic resin models and then were exposed to standardized stress at 3 different locations on the frames using a global testing machine. A custom made plane polariscope was arranged to provide polarized illumination for the light emission and analysis through the models. The photo-elastic resin models were photographed during loading under the testing machine to display the supporting areas deformation in frontal plane. The results showed that the proposed metallic designs variably distributed the stresses around the abutments and the remaining hard tissues on the photo-elastic models.
Contra la ciencia del derecho: una alternativa a su estudio y aplicación.
Authors: Huanca Villalta Juan Jose
Published: February 2023

En el presente artículo se elabora una discusión interpretativa y polémica en torno al estudio del derecho, partiendo desde coordenadas diferentes al de la ciencia jurídica con el fin de postular una alternativa al entendimiento del mismo. Para esta labor, problematizamos y nos deprendemos de su valoración como ciencia. Se toma de base la orientación filosófica que divisa la ciencia desde la perspectiva materialista de la Teoría del Cierre Categorial, para posteriormente examinar y concebir al derecho como una tecno-praxis en ilación a la teoría tridimensional como marco conceptual, permitiendo así consolidar un proyecto utilizable al servicio del investigador jurídico.
número de Dunbar en el centro del diseño de las escuelas del futuro: un caso en estudio
Authors: González García Samuel
Published: February 2023

Robin Dunbar planteó la existencia de un rango específico utilizado para cuantificar las personas que podrían formar parte de una comunidad humana, donde todas las personas integradas en esta pudieran conocerse y tener relaciones significativas.En este trabajo se muestra la evolución de un centro educativo de 3 a 18 años que ha aplicado el número de Dunbar en su diseño y se repasará la evolución del número de estudiantes, las oportunidades y ventajas percibidas que ofrece el número de Dunbar en el ámbito educativo, y cómo ha variado la aplicación de dicho número en el tiempo.
Escala de medición de la satisfacción laboral
Authors: Álvarez Velázquez Edalid , Vargas Hernández Adriana Nicole , Martínez Sánchez Cesar Enrique
Published: February 2023

La investigación propone un diseño metodológico de una escala que permite conocer el grado de satisfacción laboral en Pequeñas y Medianas Empresas (Pymes). Se basa en la teoría de higiene y motivación de Herzberg. Se integra por 15 ítems. La claridad y pertinencia de los ítems se validó con cinco expertos. Para su validez y confiabilidad se obtuvo una adecuación maestral KMO de .863. Se encontró que los resultados son significativos (X2 = 441.790, gl = 105, p = .000). El alfa de Cronbach fue igual a .906. El ejercicio de prueba se realiza en Pymes de Tuxpan Veracruz, México.
Competencias digitales en profesionales de la contaduría pública
Authors: Laverde Guzmán Maria Yolanda
Published: February 2023

La presente investigación tiene como objetivo, identificar las necesidades de los/las profesionales de la contaduría pública respecto de las tecnologías asociadas a la industria 4.0, sobre las cuales se desarrollan los procesos de digitalización de las organizaciones en la industria manufacturera. El trabajo se realizó mediante una investigación mixta, de carácter exploratorio de corte transversal, cuyos resultados evidencian el bajo nivel de competencias tecnológicas de los/las CP, situación que representa un riesgo de baja empleabilidad de cara al futuro inmediato de estos/as profesionales, al no adaptarse a la misma velocidad que avanzan las necesidades y manejo de información en la nueva normalidad.
Desigualdades modernas geradas pelas novas formas de prestação de serviços financeiros
Authors: Teixeira Maria Emília
Published: February 2023

O fenómeno FinTech revolucionou o modo de prestar serviços financeiros e transformou a relação entre o prestador destes serviços e o consumidor, sendo as plataformas digitais e aplicações o meio através do qual o consumidor passou a relacionar-se com o seu prestador de serviços financeiros. O sector bancário precisa adaptar-se de forma célere e urgente à nova realidade. O perfil do consumidor de serviços financeiros alterou-se e quanto mais digital e tecnológico se tornarem os prestadores de serviços financeiros, surgem novas desigualdades sociais. Propomo-nos analisar que desigualdades se geraram e quais os atuais impactos sociais.
ОНЛАЙН-ПРОЄКТ «СКОВОРОДА — 300»: КОНТЕНТ, ВЕБРЕСУРСИ, ПІДСУМКИ РЕАЛІЗАЦІЇ
Authors: Mikhno Oleksandr
Published: February 2023

У статті представлено алгоритм реалізації впродовж 2022 р. онлайн-проєкту Педагогічного музею України «Сковорода — 300» (до 300-річчя від дня народження Григорія Сковороди (1722-1794), українського філософа, поета, музиканта, педагога). Констатовано, що основний контент проєкту — інформація про Сковороду-педагога — було розміщено на трьох вебресурсах: офіційному сайті музею, сторінках музею у соціальних мережах «Фейсбук» та «Інстаграм», ютуб-каналі музею. Зазначено, що дописи проєкту у соцмережах публікувалися в межах інших онлайн-проєктів музею: «Цитата від музи педагогіки», «Книжковий фронт», «Педагогічна мапа Києва». Аргументовано успішність проєкту, зокрема через залучення до його реалізації студентів Київської муніципальної академії естрадного та циркового мистецтв та італійських учених з Л’Аквільського університету (University of L'Aquila, м. Л’Аквіла, Італія). Наведено статистичні підсумки реалізації проєкту: впродовж 2022 р. опубліковано 37 матеріалів про Сковороду-педагога, які переглянули понад 600 тис. осіб.
The Cultural and Nationalising Mission of Kindergarten Teachers in Southern Dobruja, 1914-1940
Authors: Zavarache Camelia
Published: February 2023

Public Education was an essential feature of nation-building throughout Europe
during the 19th century. Nationalising states designed school policies to transform
peasants into nationals and citizens. However, kindergartens were primarily urban
institutions. One of their goals was to teach young children modern languages. At
the beginning of the 20th century, Romanian elites started to create and adjust
them to nationalise Dobruja and Cadrilater, the two provinces integrated into
the Old Kingdom. Both regions were ethnically diverse. In localities primarily
inhabited by a minority population, the purpose of kindergartens was to spread
the Romanian language and national culture. This article focuses on the national
integration of South Dobruja through public kindergartens. It also examines the
professional path of teachers serving in these regions until the end of the 1940s.
Finally, the paper follows teachers’ interaction with the locals and their efforts to
mediate between the pedagogical and national aims of Greater Romania and the
local interests that sometimes collided with the state school policies.
UTTAR PRADESH ASSEMBLY ELECTION-2022
Authors: Khatik Mukesh H.
Published: February 2023

The present paper examines the process and the phases of Assembly Election of Uttar Pradesh-2022. Observing Yogi Aditynath’s achievements in UP during his last term as a CM. This Paper discusses the role of National Political Parties as well as Regional Parties and their strategies/campaigns during UP election of 2022 as Election Campaign is seen as a core element of the political process in modern democracies. Women's vote also plays a major role in the BJP's victory in Uttar Pradesh. Bharatiya Janata Party (BJP) got highest vote among all other parties in UP Election where as Congress suffered the worst defeat. The elections results indicate that how people have faith Narendra Modi
Cuidar culturalmente sensível de famílias muçulmanas numa transição de desenvolvimento
Authors: Jeremias Cristina , Rodrigues Fátima
Published: February 2023

Enquadramento: as crenças e práticas de saúde constituem uma herança perpetuada nas famílias muçulmanas. A forma como vivenciam o nascimento é uma experiência influenciada por aspetos religiosos e socioculturais. Objetivo: analisar o modo como as famílias muçulmanas vivenciam o processo de transição para a parentalidade. Metodologia: estudo descrito observacional de natureza qualitativa. Questão de investigação: Como vivenciam as famílias muçulmanas o processo de transição para a parentalidade? Amostra de seis mulheres, oriundas de famílias muçulmanas, com idades entre 20-30 anos, residentes em Lisboa. A recolha de informação foi obtida por entrevistas semiestruturadas e os dados foram sujeitos a análise de conteúdo. Foram considerados os procedimentos éticos inerentes à pesquisa. Resultados: das entrevistas emergiram três categorias: Espera apoiada pela família; Nascimento é um assunto feminino; Intergeracionalidade na transição. Conclusões: nas comunidades islâmicas, os papéis parentais e o desempenho da maternagem é apoiado pela família alargada para facilitar as aprendizagens essenciais, pelo que a mãe ou a sogra acompanha a gestação, assumindo as tarefas domésticas, os cuidados e a vigilância à grávida. Nos cuidados à puérpera e ao recém-nascido, estão presentes elementos tradicionais que necessitam da atenção dos profissionais de saúde.
Thermodynamic Performance of an Engine by Modifying Piston Bowl Geometries Fuelled by SME-100, LA-100, KB-100 Biodiesel Blends, and Diesel
Authors: Bhavesh Pathak  , Nikul Patel
Published: February 2023

Simulation of Direct injection (DI) compressed ignition (CI) engine working on diesel thermodynamic cycle on diesel-Rk software carried out for evaluating the effect on thermal performance. The analysis of an engine was worked out by applying different bowl geometrical shapes and by testing with different fuels. Further same compositions were tested on an experimental test rig having a set-up of (compressed ignition, single cylinder, four strokes, air-cooled, direct injection) diesel engine at constant crank speed. Hemispherical (HCC), Shallow depth (SCC), Re-entrant (RCC), Double wedge shallow, and Toroidal (TCC) piston geometries were created in solid-work and analyzed with B-100 blend of SME (Soybean Methyl Ester), KB (Karanja Biodiesel), LA (Roselle Biodiesel) and diesel further they were analyzed and their effects have investigated experimentally and numerically at fully loaded condition, with a constant crank speed of 1500 rpm and by setting constant compression ratio at 17.5. BSFCs were higher by 21.03%, 12.97%, and 12.96% for SME100, KB100, and LA100 with hemispherical, toroidal, and re-entrant type combustion chambers compared with the diesel fuel. Indicated thermal efficiencies and ignition delay periods were reported slightly lower for different blends and pure biodiesel than diesel at specific load conditions whereas combustion durations were reported higher compared to diesel.
ẢNH HƯỞNG CỦA VIỆC SỬ DỤNG CÁC SẢN PHẨM BAO BÌ XANH ĐẾN HÀNH VI BẢO VỆ MÔI TRƯỜNG CỦA DU KHÁCH TẠI NHA TRANG
Authors: Lê Chí Công , Lê Quốc Duy
Published: February 2023

Nghiên cứu này mở rộng lý thuyết hành vi tiêu dùng và xem xét ảnh hưởng từ những yếu tố khác nhau tác động đến hành vi bảo vệ môi trường của du khách khi đến du lịch tại Nha Trang. Các phương pháp phân tích độ tin cậy thang đo, phân tích nhân tố khám phá và phân tích hồi quy đa biến được sử dụng để phân tích mẫu khảo sát gồm 600 khách du lịch nội địa đến Nha Trang. Kết quả cho thấy hành vi bảo vệ môi trường của du khách khi đến Nha Trang chịu tác động bởi kiến thức về sản phẩm bao bì xanh; thông tin và nguồn gốc xuất xứ của sản phẩm bao bì xanh; tần suất sử dụng sản phẩm bao bì xanh. Dựa trên kết quả nghiên cứu, một số khuyến nghị chính sách được đề xuất giúp khách du lịch nội địa nâng cao ý thức bảo vệ môi trường du lịch, góp phần phát triển du lịch Nha Trang hướng đến tính bền vững.
BÌNH ĐẲNG GIỚI, THỂ CHẾ, HIỆU QUẢ LOGISTICS VÀ THƯƠNG MẠI QUỐC TẾ: NGHIÊN CỨU TRƯỜNG HỢP LĨNH VỰC NÔNG NGHIỆP VIỆT NAM
Authors: Lê Đức Nhã
Published: February 2023

Thương mại quốc tế là động lực của tăng trưởng kinh tế, hợp tác đa phương và sự thịnh vượng của mỗi quốc gia. Trong khi đó, bình đẳng giới là mục tiêu phát triển bền vững quan trọng mà các quốc gia đang hướng đến. Bên cạnh đó, nông nghiệp được xác định là trụ đỡ của nền kinh tế Việt Nam trong bối cảnh toàn cầu hóa. Tại Việt Nam, thể chế và cơ sở hạ tầng là hai trong ba đột phá chiến lược của tăng trưởng kinh tế bền vững. Hiệu quả logistics là một thước đo phản ánh sự cải thiện cơ sở hạ tầng và có ý nghĩa quan trọng đối với xuất khẩu nông sản. Bài viết sử dụng mô hình trọng lực thương mại nhằm đánh giá tác động của bình đẳng giới và chất lượng thể chế đối với xuất khẩu nông sản Việt Nam với sự tích hợp hiệu quả logistics. Phương pháp hồi quy tác động cố định và tác động ngẫu nhiên được áp dụng trên bộ dữ liệu của Việt Nam và 96 đối tác thương mại trong giai đoạn 2007-2018. Phương pháp moment tổng quát hệ thống hai bước được áp dụng để khắc phục hiện tượng nội sinh. Kết quả nghiên cứu phần nhiều ủng hộ mối quan hệ đồng biến của bình đẳng giới và hiệu quả logistics đối với xuất khẩu nông sản. Tác động điều tiết âm của chất lượng thể chế đối với mối quan hệ giữa xuất khẩu nông sản và bình đẳng giới cũng được ghi nhận. Khoảng cách chất lượng thể chế có khả năng làm giảm xuất khẩu nông sản. Về phương diện học thuật, bài viết khám phá mối quan hệ đồng biến giữa bình đẳng giới và xuất khẩu nông sản, đồng thời cho thấy tác động điều tiết của chất lượng thể chế lên mối quan hệ này. Về phương diện thực tiễn, bài viết củng cố cơ sở thực nghiệm của việc xem xét khía cạnh về giới trong việc ban hành và thực thi chính sách thương mại và nông nghiệp tại Việt Nam.
Multiepoch Detections of the Extended Atmosphere and Transmission Spectra of KELT-9b with a 1.5 m Telescope
Authors: Lowson Nataliea , Zhou George , Wright Duncan J. , Huang Chelsea X. , Mendonça João M. , Cabot Samuel H. C. , Pudmenzky Christa , Wittenmyer Robert A. , Latham David W. , Bieryla Allyson , Esquerdo Gilbert A. , Berlind Perry , Calkins Michael L.
Published: February 2023

Irradiated Jovian atmospheres are complex and dynamic and can undergo temporal variations due to the close proximity of their parent stars. Of the Jovian planets that have been cataloged to date, KELT-9b is the hottest gas giant known, with an equilibrium temperature of 4050 K. We probe the temporal variability of transmission spectroscopic signatures from KELT-9b via a set of archival multiyear ground-based transit observations, performed with the TRES facility on the 1.5 m reflector at the Fred Lawrence Whipple Observatory. Our observations confirm past detections of Fe i, Fe ii, and Mg i over multiple epochs, in addition to excess absorption at Hα, which is an indicator for ongoing mass loss. From our multiyear data set, the Hα light curve consistently deviates from a standard transit and follows a “W” shape that is deeper near ingress and egress and shallower midtransit. To search for and quantify any seasonal variations that may be present, we parameterize a “cometary tail” model to fit for the Hα transit. We find no detectable variations between the different observed epochs. Though a “cometary tail” describes the Hα flux variations well, we note that such a scenario requires a high density of neutral hydrogen in the n = 2 excited state far beyond the planetary atmosphere. Other scenarios, such as center-to-limb variations larger than that expected from 1D atmosphere models, may also contribute to the observed Hα transit shape. These multiepoch observations highlight the capabilities of small telescopes to provide temporal monitoring of the dynamics of exoplanet atmospheres.
Calibrating Cosmological Simulations with Implicit Likelihood Inference Using Galaxy Growth Observables
Authors: Jo Yongseok , Genel Shy , Wandelt Benjamin , Somerville Rachel S. , Villaescusa-Navarro Francisco , Bryan Greg L. , Anglés-Alcázar Daniel , Foreman-Mackey Daniel , Nelson Dylan , Kim Ji-hoon
Published: February 2023

In a novel approach employing implicit likelihood inference (ILI), also known as likelihood-free inference, we calibrate the parameters of cosmological hydrodynamic simulations against observations, which has previously been unfeasible due to the high computational cost of these simulations. For computational efficiency, we train neural networks as emulators on ∼1000 cosmological simulations from the CAMELS project to estimate simulated observables, taking as input the cosmological and astrophysical parameters, and use these emulators as surrogates for the cosmological simulations. Using the cosmic star formation rate density (SFRD) and, separately, the stellar mass functions (SMFs) at different redshifts, we perform ILI on selected cosmological and astrophysical parameters (Ω
m
, σ
8, stellar wind feedback, and kinetic black hole feedback) and obtain full six-dimensional posterior distributions. In the performance test, the ILI from the emulated SFRD (SMFs) can recover the target observables with a relative error of 0.17% (0.4%). We find that degeneracies exist between the parameters inferred from the emulated SFRD, confirmed with new full cosmological simulations. We also find that the SMFs can break the degeneracy in the SFRD, which indicates that the SMFs provide complementary constraints for the parameters. Further, we find that a parameter combination inferred from an observationally inferred SFRD reproduces the target observed SFRD very well, whereas, in the case of the SMFs, the inferred and observed SMFs show significant discrepancies that indicate potential limitations of the current galaxy formation modeling and calibration framework, and/or systematic differences and inconsistencies between observations of the SMFs.
LISC Catalog of Star Clusters. II. High Galactic Latitude Open Clusters in Gaia EDR3
Authors: Li Zhongmu , Mao Caiyan
Published: February 2023

It is well known that there are few open clusters (OCs) in the high-latitude region of the Milky Way galaxy, because most star formation takes place in the thin disk. It is therefore crucial to look for high Galactic latitude OCs, in order to understand OCs and the Galactic parts outside the plane well. This work looks for high Galactic latitude OCs in Gaia Early Data Release 3, and determines their basic parameters from color–magnitude diagrams (CMDs) if the main sequence is included in CMDs. The friend-of-friend method is applied to the determination of the membership of stars. Star groups with more than 20 bright (G < 18 mag) stars are taken as OC candidates, and these candidates are finally verified by the observed CMDs including stars fainter than 18 mag in the G band. After crossmatching with previous catalogs, 56 new OC candidates are found in the high Galactic latitude region with ∣b∣ ≥ 25°, in which 35 have somewhat clear CMDs and are suggested as newly discovered OCs. Finally, eight of the new OCs are confirmed again by the pyUPMASK technique. The new sample increases the total number of known high Galactic latitude OC candidates significantly. The distance modulus, color excess, metallicity, age, and binary fraction of 35 newly discovered OCs are determined by fitting their observed CMDs to the ASPS stellar population models. All the results are included in the new star cluster catalog, LISC, as its second part (LISC II).
RETRACTED: Redox Evolution of the Crystallizing Terrestrial Magma Ocean and Its Influence on the Outgassed Atmosphere
Authors: Maurice Maxime , Dasgupta Rajdeep , Hassanzadeh Pedram
Published: February 2023

Magma oceans (MOs) are episodes of large-scale melting of the mantle of terrestrial planets. The energy delivered by the Moon-forming impact induced a deep MO on the young Earth, corresponding to the last episode of core-mantle equilibration. The crystallization of this MO led to the outgassing of volatiles initially present in the Earth’s mantle, resulting in the formation of a secondary atmosphere. During outgassing, the MO acts as a chemical buffer for the atmosphere via the oxygen fugacity, set by the equilibrium between ferrous- and ferric-iron oxides in the silicate melts. By tracking the evolution of the oxygen fugacity during MO solidification, we model the evolving composition of a C-O-H atmosphere. We use the atmospheric composition to calculate its thermal structure and radiative flux. This allows us to calculate the lifetime of the terrestrial MO. We find that, upon crystallizing, the MO evolves from a mildly reducing to a highly oxidized redox state, thereby transiting from a CO- and H2-dominated atmosphere to a CO2- and H2O-dominated one. We find the overall duration of the MO crystallization to depend mostly on the bulk H content of the mantle, and to remain below 1.5 millions yr for up to nine Earth’s water oceans’ worth of H. Our model also suggests that reduced atmospheres emit lower infrared radiation than oxidized ones, despite of the lower greenhouse effect of reduced species, resulting in a longer MO lifetime in the former case. Although developed for a deep MO on Earth, the framework applies to all terrestrial planet and exoplanet MOs, depending on their volatile budgets.
Early Water Delivery to Terrestrial Planet Regions during the Stages of Jupiter’s Formation and Migration in the Grand Tack Model
Authors: Ogihara Masahiro , Genda Hidenori , Sekine Yasuhito
Published: February 2023

The formation and subsequent migration of gas giants could significantly affect the material mixing in the solar system. In this study, we use N-body simulations to investigate how much water is transported into the region of the terrestrial planet formation during the growth and migration phases of Jupiter in the Grand Tack model. We found that Jupiter’s growth was accompanied by significant mass transport and that a substantial amount of water (about 10 times Earth’s ocean mass for the initial planetesimal distribution based on the minimum-mass solar nebula) was transported into the terrestrial planet region. The total amount delivered increased further during Jupiter’s migration phase (totaling about 10–40 times Earth’s ocean mass), which was less dependent on simulation parameters. In addition, at these stages, terrestrial planets were not fully grown. Therefore, water supplied during these early stages could interact with metallic iron during the core formation of protoplanets and/or growing Earth. Since hydrogen in water molecules can dissolve into their cores, this could explain the density deficit observed in the current Earth core. Notably, Jupiter could play an important role as a “barrier” in explaining the dichotomy of the isotopic compositions between noncarbonaceous (NC) and carbonaceous (CC) meteorites. This study’s results show that Jupiter’s growth necessitates some mixing of NC and CC materials.
Análise geoespacial aplicada ao estudo da variação da linha de costa da praia de Parajuru, nordeste brasileiro
Authors: De Moura Filipe Maciel , Vasconcelos Fábio Perdigão
Published: February 2023

A investigação e a quantificação das alterações históricas da geometria litorânea é um dos principais parâmetros utilizados na detecção da erosão e deposição costeira. O conhecimento do comportamento morfosedimentar, em especial da variação da linha de costa, é determinante na gestão do território visando à atenuação e prevenção de riscos costeiros. Nesse contexto, a aplicação da análise geoespacial é de suma importância, pois fornece uma análise espaço-temporal, possibilitando inclusive a projeção de cenários futuros. Partindo desses pressupostos, objetivamos neste trabalho a medição, quantificação, cálculo e monitoramento das taxas de variação da geometria litorânea associada à foz do rio Pirangi. A área de estudo localiza-se no litoral Lesteleste do Ceará – Nordeste do Brasil, e utilizaram-se dados multitemporais enquadrados em uma escala decadal, entre os anos de 1979 e 2014. Foram individualizados dois setores com base em critérios morfológicos, setor um setor de face praial exposta e outro de face praial abrigada. O primeiro setor corresponde ao spit arenoso, situado na desembocadura do rio Pirangi, e o segundo setor corresponde à linha de costa da praia de Parajuru, disposta em direção oeste ao referido spit arenoso. Foram utilizadas imagens de satélite da série Landsat 2, 5 e 8 para aplicação da ferramenta de análise Digital Shoreline Analysis System – DSAS, que possibilitou a determinação dos parâmetros estatísticos para o cálculo das taxas de variação da linha de costa. O setor referente ao spit arenoso apresentou uma variação média anual de -3,843 m/ano, taxa de tendência de variação anual de -4,759 m/ano e uma variação absoluta entre -268,95 e 51,23 m. Por sua vez, o setor referente à linha de costa da praia de Parajuru apresentou uma variação média anual de -5,002 m/ano, taxa de tendência de variação anual de -5,996 m/ano e uma variação absoluta entre -562,38 e 287,89 m. Deste modo, os processos erosivos têm predominado em ambos os setores (praia e spit arenoso), sendo mais expressivos no setor da linha de costa. Contudo, vale ressaltar que o spit arenoso teve sua extensão E-W acrescida de 1,53 km no ano de 1979, para 14,44 km no ano de 2014. A tendência erosiva generalizada para a área de estudo está provavelmente relacionada ao estabelecimento de barragens e estruturas físicas para carcinicultura ao longo do leito fluvial do rio Pirangi, principalmente a partir da década de 1980, diminuindo o aporte de sedimentação continental realizada através do rio. Além disso, o avanço da urbanização e das atividades econômicas realizadas na zona costeira, como o turismo, interfere diretamente nos fluxos sedimentares, contribuindo para a intensificação dos processos erosivos.
Light and temperature records of the seawater associated to southern elephant seal dives during foraging trips in South Atlantic and Pacific Oceans
Authors: Eder Elena B. , Zárate Marcos , Lewis Mirtha N.
Published: February 2023

The dataset encloses geolocalized records of dive and surface interval durations, light level and temperature of the seawater during the postresting and postmolting trackings of 13 immature southern elephant seals, Mirounga leonina. It describes an unpublished open access version of the original data with records of light level and temperature of the water column using the Darwin Core standard (DwC) through ArOBIS guaranteeing compliance with the FAIR principles, encompassing a wide time scale (2005, 2006 and 2007) and geographic range in the South Atlantic and Pacific Oceans (South West [-58.75, -81.29], North East [-37.60, -28.65]). Seals were simultaneously equipped with affordable light–temperature loggers (LTLs) and satellite devices. The LTLs recorded light level and temperature of the water column at 30-s intervals during dives, and light–time records were applied to estimate dive parameters of diurnal records from 06:00 am to 05:00 pm, since movements up and down the water column are reflected by changes in light level. For that, the minimum light level reached at the surface of a dive was determined experimentally with diurnal dive simulations at sea using the LTLs devices before deployment. The dataset also includes variation of light and temperature of records between 17 pm to 06:00 am. Data can be used to identify temperature changes associated to seawater masses as drivers of the distribution of other taxa of interest, and variation of light level in the seawater (light attenuation) could be linked to concentrations of phytoplankton assemblages as an index of primary productivity.

This dataset provides unpublished primary data of the duration of dives and surface intervals, and associated records of light level and temperature variations along the movements throughout the sea water of 13 immature southern elephant seals in the southern Hemisphere. Data were recorded with light-temperature loggers (LTLs) and uploaded following the Darwin Core standard and compliance with the FAIR principles.
Difficultés conjoncturelles et structurelles : que faire pour que le secteur automobile puisse se construire un avenir ?
Authors: Sepulchre de Condé Didier
Published: February 2023

L’industrie automobile est dans une tourmente, conjoncturelle, tout d’abord, avec un marché profondément affecté par le Covid, des pénuries de matériaux et composants et des clients désorientés ; structurelle, ensuite, avec la transition à marche forcée vers l’électrification. Cette double crise est à haut risque pour l’industrie automobile, mais l’alignement de l’action de l’ensemble des parties prenantes devrait permettre à la filière française de rester dans la course pour l’automobile du futur.
Krackow Stitch and Whipstitch Use in Distal Biceps Tendon Rupture Repair: A Porcine Composite Bone Biomechanical Study
Authors: DiVella Michael , Cecora Andrew , Duell Bryan , Fogel Joshua , Ruotolo Charles
Published: February 2023

The suture combination of a Krackow stitch plus a whipstitch can be used to strengthen a tendon rupture repair. We compared biomechanical outcomes of suture repair techniques for distal biceps tendon ruptures using a single Krackow stitch with and without a whipstitch and a whip-stitch alone. Data were obtained from 36 thawed porcine flexor profundus tendons. A cortical button was secured to fourth-generation composite bone using No. 2 FiberWire (Arthrex) and No. 2 FiberLoop (Arthrex). The primary outcome was maximum load to failure. Secondary outcomes were displacement at the bone-tendon interface, total construct elongation, and stiffness. The Krackow plus whipstitch group (mean, 493.82 N; SD, 209.44 N) had a greater maximum load to failure as compared with the single Krackow group (mean, 333.71 N; SD, 172.32 N) (
P
=.01) and single whipstitch group (mean, 207.27 N; SD, 66.42 N) (
P
<.001). The single Krackow group (mean, 1.67 mm; SD, 0.89 mm) had a greater bone-tendon interface displacement (
P
=.01) after preloading and before cyclic loading than the single whipstitch group (mean, 0.83 mm; SD, 0.58 mm). There were no other secondary outcome differences between groups. A repair using Krackow plus whipstitch is biomechanically stronger with no difference in bone-tendon interface displacement, total construct elongation, or stiffness when compared with a single Krackow or single whipstitch. We recommend this repair technique for distal biceps tendon rupture repair, which may accelerate rehabilitation and decrease re-rupture rate. [
Orthopedics
. 2023;46(4):224–229.]
The Most Cited Articles and Authors in Refractive Surgery
Authors: Randleman J. Bradley , Asroui Lara , Tarib Imane , Scarcelli Giuliano
Published: February 2023

Purpose:

To provide a comprehensive analysis of the most highly cited articles and authors in refractive surgery.

Methods:

The Scopus database was searched for articles pertaining to refractive surgery using multiple search terms to identify the top 100 most cited articles in refractive surgery. A publicly available database of more than 100,000 scientists that provides standardized information on multiple variables resulting in a composite indicator (C score) was searched to identify refractive surgery authors. A refractive surgery–specific composite score was created using only the authors' publications that were directly related to refractive surgery.

Results:

The 100 most cited articles and 40 refractive surgery authors with the highest ranked C score were identified. The article with the most citations by Trokel et al has garnered nearly 800 citations to date. All articles included in the top 100 had 200 or more citations. The peak publication years were 1998 to 2001. Laser in situ keratomileusis (22), photorefractive keratectomy (18), and postoperative corneal ectasia and/or corneal biomechanics (16) were the most represented topics. Emory University generated the most articles (7) and the majority of publications (48%) originated in the United States. Steven E. Wilson, MD, had the highest refractive C score and Jorge L. Alió, MD, PhD, had the most refractive surgery articles and citations. Among all authors listed, the average number of refractive surgery publications was 97, with 35% of the group having more than 100 refractive surgery articles published. All authors on the list had more than 2,000 citations for their refractive surgery articles, whereas 38% had 4,000 or more citations.

Conclusions:

This list provides a comprehensive assessment of the most cited articles and authors in refractive surgery and demonstrates key focuses and trends in the field over time.

[
J Refract Surg
. 2023;39(2):78–88.]
Optimal Timing of Repositioning Surgery for a Plate-Haptic Toric Intraocular Lens: A Multicenter Retrospective Study
Authors: Ma Dongmei , Yu Wenjuan , Cai Lei , Shen Jiying , Guo Tao , Chen Xu , Dong JianHong , Zeng Qiulin , Wang Aijun , Hua Zhixiang , Zhu Xiangjia , Zheng Tianyu , Lu Yi , Yang Jin
Published: February 2023

Purpose:

To evaluate risk factors for significant rotation and determine optimal timing for repositioning surgery following a plate-haptic toric intraocular lens (IOL) implantation.

Methods:

This retrospective study enrolled patients who underwent the plate-haptic toric IOL implantation at seven hospitals in Shanghai. IOL rotation and residual astigmatism were compared before and after repositioning surgery. Risk factors for significant IOL rotation after cataract surgery were identified by stepwise multiple linear regression analysis. Spearman's and linear regression analyses were performed to identify factors associated with IOL rotation after repositioning. The receiver operator characteristic (ROC) curve was used to analyze the optimal timing for repositioning surgery.

Results:

Among 2,745 eyes implanted with the toric IOL, 46 eyes (1.68%) of 45 patients underwent repositioning surgery. Axial length and lens thickness were significantly associated with IOL rotation before repositioning. After repositioning surgery, IOL rotation and residual astigmatism were significantly reduced (all
P
< .001). IOL rotation after repositioning was negatively associated with the timing of repositioning surgery (all
P
< .001). The ROC curve showed that the optimal cut-off for the timing of repositioning surgery was 15 days or greater.

Conclusions:

The prevalence of repositioning surgery after the plate-haptic toric IOL implantation was 1.68%, and the optimal timing for repositioning surgery was recommended to be 2 to 3 weeks after cataract surgery.

[
J Refract Surg

.
2023;39(2):120–126.]
Emerging Pediatric Obesity Epidemic with the COVID-19 Pandemic as an Influence
Authors: Al-Agailat Lara , Littlejohn Elizabeth
Published: February 2023

Obesity remains a significant public health issue that leads to serious acute and chronic diseases. The prevalence of childhood obesity is on the rise, especially when taking into consideration the novel coronavirus disease 2019 (COVID-19) pandemic. Pediatricians and primary care providers can help support children at risk for many obesity-related comorbidities by using a family based approach for intervention. In this review, we will provide a brief overview of childhood obesity with COVID-19 pandemic ramifications and guidance for pediatricians to provide needed support and initial treatment.

[
Pediatr Ann
. 2023;52(2):e48–e50.]
Genetic Obesity—Causes and Treatments
Authors: Miller Jennifer
Published: February 2023

Genetic abnormalities are responsible for up to 70% of severe, early onset obesity. With recent advances in genetic testing, more individuals with genetic etiology of excessive weight are being identified. However, treatment will need to be individualized based on the cause and underlying pathophysiology. Several treatment options are being investigated, and there are several treatment options now commercially available for some of these genetic conditions.

[
Pediatr Ann
. 2023;52(2):e57–e61.]
Retinal Detachment Prophylaxis for Patients With Stickler Syndrome: A Survey of Pediatric Retinal Specialist Treatment Preferences
Authors: Naravane Ameay V. , Belin Peter J. , Quiram Polly A.
Published: February 2023

Background and Objective:

Stickler syndrome is the most common inherited cause of pediatric rhegmatogenous retinal detachment. The purpose of this study was to survey pediatric retinal surgeon preferences for prophylactic treatment of Stickler syndrome patients.

Study Design:

A voluntary, anonymous 27-question survey was developed by RedCap and distributed to the Association of Pediatric Retinal Surgeons. The survey was distributed on March 17, 2021. Results were tabulated on April 12, 2021 in Microsoft Excel. All surveys returned were included.

Results:

Thirty-four (76% response rate) respondents completed the survey. Twenty-six (76%) reported primarily using prophylactic laser retinopexy, four (12%) preferred use of cryotherapy, and 12% reported using prophylactic scleral buckle.

Conclusions:

The majority of the United States. and international pediatric retinal surgeons use laser retinopexy as the primary method of prophylactic treatment. These results may serve as a benchmark for retinal surgeons less familiar with prophylactic treatment approaches.

[
Ophthalmic Surg Lasers Imaging Retina
2023;54:102–107.]
Arachidonic acid metabolism and its use in the diagnosis of mastocytosis
Authors: Jandus Peter
Published: February 2023

Mast cells and basophils degranulate upon activation, releasing preformed mediators from intracellular granules into the extracellular environment, of which tryptase and histamine are the two most common and best characterized mediators. Despite the large number of mediators synthesized by mast cells, the non-tryptase biomarkers used to evaluate systemic mastocytosis and mast cell activation syndrome do not include the metabolites of the prestored amine histamine and the de novo synthesized phospholipids prostaglandin D2 and leukotriene C4. Currently, these markers are not used as criteria for the diagnosis of mastocytosis and mast cell activation syndrome. However, consensus groups foster the use of increases in measured baseline levels of these metabolites as potential diagnostic criteria. Metabolites of arachidonic acid such as prostaglandin D2 or leukotriene C4 play a role in the development of symptoms in systemic mastocytosis and mast cell activation syndrome. In this review, the metabolites of arachidonic acid and the detection of the metabolites of leukotrienes and prostaglandins in mastocytosis are highlighted. Measurement of these metabolites remains a major challenge because they are not widely available in daily clinical practice. However, new insights have been gained in recent years, and their application in the clinic has progressed.
Visual Question Answering reasoning with external knowledge based on bimodal graph neural network
Authors: Yang Zhenyu , Wu Lei , Wen Peian , Chen Peng
Published: February 2023

Visual Question Answering (VQA) with external knowledge requires external knowledge and visual content to answer questions about images. The defect of existing VQA solutions is that they need to identify task-related information in the obtained pictures, questions, and knowledge graphs. It is necessary to properly fuse and embed the information between different modes identified, to reduce the noise and difficulty in cross-modality reasoning of VQA models. However, this process of rationally integrating information between different modes and joint reasoning to find relevant evidence to correctly predict the answer to the question still deserves further study. This paper proposes a bimodal Graph Neural Network model combining pre-trained Language Models and Knowledge Graphs (BIGNN-LM-KG). Researchers built the concepts graph by the images and questions concepts separately. In constructing the concept graph, we used the combined reasoning advantages of LM+KG. Specifically, use KG to jointly infer the images and question entity concepts to build a concept graph. Use LM to calculate the correlation score to screen the nodes and paths of the concept graph. Then, we form a visual graph from the visual and spatial features of the filtered image entities. We use the improved GNN to learn the representation of the two graphs and to predict the most likely answer by fusing the information of two different modality graphs using a modality fusion GNN. On the common dataset of VQA, the model we proposed obtains good experiment results. It also verifies the validity of each component in the model and the interpretability of the model.
Algorithms for solving a class of real quasi-symmetric Toeplitz linear systems and its applications
Authors: Zhang Xing , Jiang Xiaoyu , Jiang Zhaolin , Byun Heejung
Published: February 2023

In this paper, fast numerical methods for solving the real quasi-symmetric Toeplitz linear system are studied in two stages. First, based on an order-reduction algorithm and the factorization of Toeplitz matrix inversion, a sequence of linear systems with a constant symmetric Toeplitz matrix are solved. Second, two new fast algorithms are employed to solve the real quasi-symmetric Toeplitz linear system. Furthermore, we show a fast algorithm for quasi-symmetric Toeplitz matrix-vector multiplication. In addition, the stability analysis of the splitting symmetric Toeplitz inversion is discussed. In mathematical or engineering problems, the proposed algorithms are extraordinarily effective for solving a sequence of linear systems with a constant symmetric Toeplitz matrix. Fast matrix-vector multiplication and a quasi-symmetric Toeplitz linear solver are proven to be suitable for image encryption and decryption.
The impact of digital economy on the export competitiveness of China's manufacturing industry
Authors: Wang Fei , Guo Benhai , Wang Zixing , Wu Yuxin
Published: February 2023

The digital economy is an important driving force for the high-quality development of the manufacturing industry. This paper uses 2013–2019 manufacturing panel data to empirically test the impact of digital economic growth on China's manufacturing export competitiveness. The results show that, first, the degree of integration of manufacturing and digital economy in the eastern region is higher than that in the central and western regions. Second, the development of the digital economy has indeed had a significant positive impact on the export competitiveness of China's manufacturing industry. Third, the digital economy has different impacts on the export competitiveness of manufacturing industries in different industries and regions. Based on the findings, some suggestions are made to further enhance the export competitiveness of China's manufacturing industry, such as paying attention to the development of digital infrastructure, optimizing the mode of integration of the manufacturing sector and the digital economy, and enhancing international collaboration in digital technology innovation.
Ode to duty
Authors: Sathiadas M. G.
Published: February 2023

No abstract available
Successful management of clostridium difficile colitis with antegrade Vancomycin through a mu-cous fistula eliminating the need for subtotal colectomy
Authors: Joseph S. A. , Jayasuriya Kamal
Published: February 2023

Clostridium difficile (CD) is the most common cause of healthcare-associated infections and can have devastating morbidity and mortality. A 40-year-old diabetic patient who was recently treated for wound sepsis, subsequently developed CD colitis. This patient failed the standard medical therapy for CD colitis, decompensated and required surgical exploration, partial colectomy and mucous fistula creation. Following surgery, her clinical condition improved and her colitis resolved with the antegrade administration of vancomycin through mucous fistula. Traditional treatment algorithms involve oral metronidazole or vancomycin. Our case study report describes the index case of topical vancomycin through a mucous fistula may have reduced the need for total colectomy in the treatment of fulminant CD colitis.