bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthetic data generation of vibration signals at different speed and load conditions of transmissions utilizing generative adversarial networks
Authors: König Timo , Wagner Fabian , Bäßler Robin , Kley Markus , Liebschner Marcus 
Published: May 2023

Abstract
Condition monitoring of machines and powertrain components is an essential part of ensuring reliability and product safety in many industries. The monitored machines and components are often divided into different condition classes as well as classified using machine learning methods. In order to enable classification with machine learning algorithms, the acquisition of a sufficient amount of data from each condition class is essential. In reality, the collection of data for faulty system states turns out to be much more difficult, therefore in many use cases balanced data sets are not available. However, when classifying faulty states, an identical number of data per class is of great importance. This problem can be counteracted with synthetic data generation. Generative Adversarial Networks (GAN) are a suitable approach to generate synthetic data based on real measured data. In most cases of synthetic data generation, different damage cases, e.g. from a transmission, are simulated, but a generation of synthetic data is not performed at different operating conditions. However, different speeds and torques are a reality when monitoring, as the drive systems operate under changing operating conditions. Therefore, in the context of this paper, synthetic data generation at different operating states is investigated in order to implement a condition monitoring system for good and bad system conditions which includes different operating states. So, vibration data is acquired at different operating conditions of a transmission on a drive test rig and relevant features are highlighted using a suitable signal pre-processing method. The features, caused by different operating conditions, can also be generated synthetically by GAN. Therefore, it is possible to achieve a similar classification accuracy by integrating synthetically generated data as with real data, which makes the synthetic data generation a viable solution for extending existing data sets.
Machine learning based geometry reconstruction for quality control of laser welding processes
Authors: Hartung Julia , Jahn Andreas , Heizmann Michael 
Published: May 2023

Abstract
The increasing use of automated laser welding processes causes high demands on quality control. 2D or 3D sensor technology can be used for data acquisition to monitor the weld quality after laser welding. Compared to a 2D camera image, the 3D height data, e.g. acquired using optical coherence tomography, contains additional relevant information for quality inspection. However, the disadvantages are system complexity, higher costs, and longer acquisition times. Therefore, we compare image-based methods with the quality assessment based on height data. The first method uses feature vectors from grayscale images taken coaxially with the laser beam. The significant advantage is that a camera is often integrated into the laser system, so no additional hardware is required. In the second approach, we use an AI-based single-view 3D reconstruction method. The height profile is reconstructed from a camera image and used for further quality assessment. Thus, we combine the advantages of 2D data acquisition with higher accuracy in evaluating 3D data. In addition, we consider the usually low data availability in the industrial environment in the development of algorithms. We use a training data set with 95 samples and a test data set with 858 samples. The work uses the contracting process of copper wires to produce formed coil windings to illustrate the method. We analyze a data set with different defect types and compare the quality assessment using the height data acquired with OCT, the feature vectors from the camera images, and the reconstructed height data.
Optimization and numerical investigation of combined design of blade and endwall on rotor 67
Authors: Li Xin , Meng Tongtong , Zhou Ling , Li Weiwei , Ji Lucheng 
Published: May 2023

Abstract
In this work, a combined design of blade and endwall using the Extended Free Form Deformation technique is proposed and implemented on a transonic compressor rotor (the NASA Rotor 67). The best combined design is explored by numerical investigations and optimization via Kriging surrogate model method. As a result, by only modifying the hub and blade under 15 % span, the peak adiabatic efficiency is increased by 0.4 % and the overall aerodynamic performance for all operating conditions is also improved. An analysis shows that the enlarged dihedral angle between the hub and blade restrains boundary layer intersection and development. Meanwhile, the optimized hub changes the pressure distribution and prevents migration of cross-flow. As a result, the low-energy flow in the corner is accelerated downstream and the separation is limited, leading to an effective improvement in throughflow capability and aerodynamic performance in the corner region.
A comparative study on the local structures of the V4+ and Cu2+ centers in WO3
Authors: Zhang Xiaolan , Zhou Zifa , Feng Cuidi , Zhang Huaming 
Published: May 2023

Abstract
The local structures and electron paramagnetic resonance (EPR) parameters (the g factors g

i
and the hyperfine structure constants A

i
, with i = x, y, z) of the V4+ and Cu2+ centers in WO3 were theoretically investigated based on the perturbation formulas of the EPR parameters for 3d1 and 3d9 ions under rhombically compressed and elongated octahedra, respectively. In these formulas, the adopted crystal-field parameters (CFPs) are obtained from the superposition model which enables connection of the CFPs and hence the EPR parameters to the rhombic distortion. Based on the calculations, the impurity-ligand distances of the studied [VO6]8− (or [CuO6]10−) cluster are found to suffer the axial compression (or elongation) δz of about 0.098 Å (or 0.132 Å) along the z-axis, and the additional planar bond length variation δr (≈0.052 or 0.047 Å) along x- and y-axis, respectively, due to the Jahn–Teller (JT) effect.
Polímata: entre sopa de letrinhas e Alep
Authors: Lenzi Teresa 
Published: May 2023

Este trabalho se baseia na transcrição adaptada da conversa ocorrida no âmbito da atividade vir tual PPGAVI Convida (UFPel, 2020), cujo objetivo foi ref letir sobre a formação dos professores e atores culturais promovida pelas universidades e instituições culturais brasileiras. Desde a amplitude dos fazeres acadêmicos pergunto: professor, pesquisador, pensador e criador, af inal quem é o que somos? Da mesma maneira indago-me sobre a realidade do ensino de Ar te nas diferentes instâncias formadoras e a coerência entre prática e teorias fundacionais da Educação e da Ar te; e reivindico a manutenção da autocrítica, tanto em âmbito pessoal quanto institucional, de nossos perfazeres e nossas estruturas educacionais e artístico-culturais como dispositivos indispensáveis à saúde dessa área do conhecimento. A reflexão se articula em três momentos: uma introdução históricoacadêmica pessoal em relação ao seu contexto histórico; um resumo da trajetória pessoal em diálogo com a consolidação dos cursos de Artes no Brasil nas últimas décadas do século XX; por último, a retomada das questões motivadoras da conversa com o propósito de provocar uma discussão e reflexão coletiva.Palavras-chave: Arte-educação; Artes Visuais; Formação docente e artística. Polímata: entre la sopa de letras y el AlephResumen: Este trabajo está basado en la transcripción adaptada de uma conversación que tuvo lugar en el contexto de la actividad virtual PPGAVI Convida / (UFPel) / 2021, cuyo objetivo fue reflexionar sobre el processo de formación de los profesores y actores culturales impulsado por las universidades e instituciones en Brasil. Desde la amplitud de las acciones académicas indago: profesor, investigador, pensador y creador, al fin y al cabo, ¿quiénes y qué somos? De la misma forma, me pregunto sobre la realidad de la enseñanza del arte en diferentes instancias educativas, sobre la coherencia entre la práctica y las teorías fundacionales de la educación y del arte, y reclamo el mantenimiento de la autocrítica, tanto en el ámbito personal como institucional, de nuestros logros y de nuestras estructurasculturales, educativas y artísticas, como dispositivo indispensable para la salud de esta área del conocimiento. La reflexión se articula en tres momentos: una introducción histórico-académica personal en relación a su contexto histórico; un resumen de la trayectoria personal en diálogo com la consolidación de los cursos de arte en Brasil en las últimas décadas del siglo XX, finalmente, una retomada de las preguntas que motivaron la conversación con el propósito de provocar una discusión y reflexión colectiva.Palabras clave: Educación artística; Artes visuales; Docencia y formación artística.
Os Usos do livro e da escrita no Balé Europeu do século XVIII: o caso das Lettres sur la danse et le ballet (Cartas sobre dança e balé), de Jean Georges Noverre
Authors: Vallejos J. I. , Ferreira Rousejanny da Silva 
Published: May 2023

[O texto traduzido por Rousejanny da Silva Ferreira é a versão em português do artigo de Vallejos, J. I. (2016), Los usos del libro y de la escritura en el ballet europeo del siglo XVIII: el caso de Las Cartas sobre la danza y el ballet de Jean-Georges Noverre, en Cuadernos de Historia Moderna, 41(1), 129-146. Disponível em: http://dx.doi.org/10.5209/CHMO.52762.]Resumo: Este artigo visa estudar os usos dos livros, em particular o Lettres sur la danse et sur les ballets (Cartas sobre dança e balé), de Jean-Georges Noverre, no contexto do surgimento do balé pantomímico na segunda metade do século XVIII. O discurso de Noverre está diretamente associado a um projeto de revalorização da arte da dança, nesse sentido, o objeto livro não é apenas um suporte para o novo discurso estético como também uma ferramenta com múltiplas utilidades que procura, ao mesmo tempo, modificar o olhar do público no palco, legitimar o sucesso do novo gênero teatral e valorizar a profissão do mestre de balé.Palavras-chave: Balé Pantomima; Iluminismo; História do Livro; História da dança; Jean Georges Noverre. Los usos del libro y de la escritura en el ballet europeo del siglo XVIII: el caso de ‘Las Cartas sobre la danza y el ballet, de Jean-Georges NoverreResumen: Este artículo se propone estudiar los usos del libro, en especial de las Lettres sur la danse et sur les ballets de Jean-Georges Noverre, en el marco de la emergencia del ballet pantomima en la segunda mitad del siglo XVIII. El discurso de Noverre está directamente asociado a un proyecto de revalorización del arte de la danza. En este sentido, el objeto libro no constituye únicamente un soporte del nuevo discurso estético sino una herramienta con múltiples utilidades. La misma busca, al mismo tiempo, modificar la mirada del público sobre la escena, legitimar el éxito del nuevo género teatral y valorizar el oficio de maestro de ballet.Palabras-clave: Ballet Pantomima; Ilustración; Historia del Libro; Historia de la danza; Jean-Georges Noverre. The Uses of Print and Writing in Eighteenth Century European Ballet: the Case of The Letters on Dancing and Ballets by Jean-Georges NoverreAbstract: This article aims to study the uses of print, especially the Letters on Dancing and Ballets by Jean-Georges Noverre, throughout the emergence of pantomime ballet in the late eighteenth century. Noverre’s discourse is directly associated with a project to revitalize the art of dance. In this sense, books as an object are not only a support for the new aesthetic discourse, but a tool with multiple uses. It simultaneously seeks to modify the spectator’s view of the scene, legitimize the success of the new theatrical genre and value the ballet master profession.Keywords: Pantomime Ballet; Enlightenment; History of Books; Dance history;Jean-Georges Noverre.
Studi Pembesaran Ikan Kerapu Bebek (Chromileptes altivelis) dalam Keramba Jaring Apung di Balai Perikanan Budidaya Laut (BPBL) Ambon
Authors: Arif Desilina , Regan Yip 
Published: May 2023

Tujuan pengamatan dalam studi ini adalah untuk mengetahui teknik pembesaran dan laju pertumbuhan ikan kerapu bebek (Chromileptes altivelis) dalam Keramba jaring apung (KJA) mulai dari ukuran benih sampai ukuran konsumsi, dan kendala kendala yang dihadapi. Pengamatan dilakukan terhadap satu kurungan yang berukuran awal 1x1x1 m3 ,kemudian menjadi 3x3x3 m3 menjelang dewasa. Bahan kerangka terbuat dari kayu besi, dan pelampung dari drum plastik. Unit KJA ini ditempatkan di Teluk Ambon Bagian Dalam (TAD). Kedalam keramba ditebar benih ukuran 8,80 g, kepadatan 50 ekor/m3. Diberipakan rucah, terdiri dari campuran ikan teri (Stolephorus spp) dan ikan layang (Decapterus sp) dengan dosis 6-10 % dari total biomassa. Frekuensi pemberian 2x/hari pada pukul 08.00 pagi dan 17.00 sore. Untuk mengetahui pertumbuhan setiap bulan dilakukan pengambilan sampel dan penghitungan menggunakan rumus Yamaguchi ,yang diikuti pengamatan kualitas air sebanyak 1x/minggu. Hasil pemeliharaan selama 12 bulan diperoleh berat rata-rata 364,58 g/ekor, laju pertumbuhan harian 0,5 % dan menghasilkan Nilai konversi pakan 11,5 serta kelulusan hidup sebesar 52%. Kendala yang dihadapi dalam pembesaran ini diantaranya adalah: 1). Konversi pakan yang tinggi; dan 2).Adanya persaingan dalam hal kepentingan masyarakat yang juga mengkonsumsi ikan rucah. Hasil pengamatan menunjukkan bahwa pembesaran kerapu bebek dalam KJA di Balai Budidaya Laut (BBL) Ambon secara teknik telah berhasil. Namun demikian kegiatan ini masih bersifat pengujian untuk memperoleh informasi teknis sebagai langkah awal untuk mendapatkan informasi dalam rangka pengembangan budidaya terutama budidaya ikan di laut dengan wadah kaeramba jaring apung (KJA).
Kajian Vegetasi Kawasan Hutan Mangrove Wana Tirta di Kulon Progo Daerah Istimewa Yogyakarta
Authors: Rombe Katarina Hesty , Arafat Yasser , Surachmat Agus , Andhini Firda Ayu 
Published: May 2023

Hutan mangrove merupakan hutan yang tumbuh di daerah air payau dan dipengaruhi oleh pasang surutnya air laut. Keberadaan hutan mangrove sekarang ini cukup mengkhawatirkan karena ulah manusia untuk kepentingan konversi lahan sebagai tambak, pemukiman, perhotelan, ataupun tempat wisata. Praktek ini dilaksanakan pada 4 Maret hingga 10 April bertujuan untuk mengetahui jenis vegetasi, kerapatan dan Indeks Nilai Penting (INP) mangrove Wana Tirta di Kulon Progo Daerah Istimewa Yogyakarta. Pengambilan data dilakukan dengan menggunakan metode kombinasi antara metode transek dan metode kuadrat yaitu metode transek kuadrat.Analisis vegetasi meliputi kerapatan jenis, kerapatan relatif, frekuensi jenis, frekuensi relatif, dan indeks nilai penting. Ditemukan 6 jenis mangrove yaitu Acanthus ilicifolius, Avicennia alba, Avicennia marina, Nypa fruticans, Rhizophora mucronata, dan Sonneratia alba. Kerapatan jenis keseluruhan tingkat pohon di stasiun I adalah 12200 Ind/Ha dan di stasiun II adalah 5800 Ind/Ha. Stasiun I memiliki INP 198.11% untuk Rhizopora mucronata 52.67% untuk Avicennia alba dan 49.22% untuk Avicennia marina dan stasiun II memiliki INP 181.75% untuk Rhizopora mucronata 70.46% untuk Sonneratia alba dan 47.79% untuk Avicennia alba.
COMPARATIVE CHARACTERISTICS OF AROMA PROFILE OF WILD AND CULTURED EDIBLE MUSHROOMS
Authors: Vlasenko K. , Kuznetsova O. , Heisun A. , Matrosov O. 
Published: May 2023

The increased consumption of edible mushrooms is not only due to their nutritional value, but also to their unique taste and specific flavor. The aroma of cultivated mushrooms is different from wild ones, it is often less pronounced. The aim of the study was to determine the characteristics of the aroma of wild and cultivated edible mushrooms using the methods of sensory profile analysis and ultraviolet spectrophotometry. Sensory profile analysis showed that aroma profiles of mushroom samples differed in intensity depending on a kind of a mushroom. It was found that Boletus sp. had the highest intensity of the mushroom component of flavor among wild mushrooms. The intensity of woody flavor components was higher in B. subtomentosus, L. aurantiacum and P. ostreatus IBK-1535. More pronounced herbaceous notes were observed for a wild P. ostreatus and A. silvaticus, sweet – for S. luteus, and floral – for P. djamor. Among the cultivated fungi, the most pronounced mushroom notes are observed for A. bisporus. The lowest intensity of aroma had such wild mushrooms as P. ostreatus and S. luteus. Also, the least pronounced flavor was noted for the cultivated P. djamor. The flavor of this mushroom is characterized by fishy notes. The obtained UV-spectra of different mushroom species varied in the intensity of the light absorption maxima. The highest intensity in the entire wavelength range had the extract of B. edulis fruit bodies. Among the cultivated fungi, A. bisporus was characterized by the highest optical density of hexane extract at 207 nm, and A. bisporus and P. ostreatus strains IBK-551 and IBK-1535 absorbed light the most intense in the region of 260–290 nm. The results of determining the organoleptic profile and spectrophotometric analysis of mushroom extracts indicate that the industrial cultivation of edible mushrooms disrupts or inhibits the formation of aroma substances by fruiting bodies, which leads to a decrease in their consumer quality. Therefore, in order to increase the demand for cultivated edible mushrooms, the flavor of which is one of the determining factors of their attractiveness, it is necessary to conduct a comprehensive study of the dependence of the aroma substances formation on the growing process parameters.
Phenotyping of risk factors and prediction of inhospital mortality in patients with coronary artery disease after coronary artery bypass grafting based on explainable artificial intelligence methods
Authors: Geltser B. I. , Shakhgeldyan K. I. , Rublev V. Yu. , Domzhalov I. G. , Tsivanyuk M. M. , Shekunova O. I. 
Published: May 2023

Aim. To develop predictive models of inhospital mortality (IHM) in patients with coronary artery disease after coronary artery bypass grafting (CABG), taking into account the results of phenotyping of preoperative risk factors.Material and methods. This retrospective study was conducted based on the data of 999 electronic health records of patients (805 men, 194 women) aged 35 to 81 years with a median (Me) of 63 years who underwent on-pump elective isolated CABG. Two groups of patients were distinguished, the first of which was represented by 63 (6,3%) patients who died in the hospital during the first 30 days after CABG, the second — 936 (93,7%) with a favorable outcome. Preoperative clinical and functional status was assessed using 102 factors. Chi-squares, Fisher, Mann-Whitney methods were used for data processing and analysis. Threshold values of predictors were determined by methods, including maximizing the ratio of true positive IHM cases to false positive ones. Multivariate logistic regression (MLR) was used to develop predictive models. Model accuracy was assessed using 3 following metrics: area under the ROC curve (AUC), sensitivity (Sens), and specificity (Spec).Results. An analysis of preoperative status of patients made it possible to identify 28 risk factors for IHM, combined into 7 phenotypes. The latter formed the feature space of IHM prognostic model, in which each feature demonstrates the patient’s compliance with a certain risk factor phenotype. The author’s MLR model had high quality metrics (AUC-0,91; Sen-0,9 and Spec-0,85).Conclusion. The developed data processing and analysis algorithm ensured high quality of preoperative risk factors identification and IHM prediction after CABG. Prospects for further research on this issue are related to the improvement of explainable artificial intelligence technologies, which allow developing infor­mation systems for managing clinical practice risks.
Vascular stiffness, 24-hour blood pressure profile in patients with hypertension and anxiety-depressive disorders in andro- and menopausal periods
Authors: Timofeeva O. V. , Skibitsky V. V. , Fendrikova A. V. , Skibitsky A. V. 
Published: May 2023

Aim. Identification and analysis of the features of vascular stiffness, 24-hour blood pressure (BP) profile, and central aortic pressure (CAP) in patients with hyper­tension (HTN) and anxiety-depressive disorders (ADDs) during andro- and meno­pausal periods.Material and methods. The study included 120 patients with uncontrolled hyper­tension in the andro- and menopausal periods, of which 60 patients with hyper­tension and ADDs (30 men and 30 women) with median age of 58 years (52-64 years), as well as the control group — 60 patients with hypertension without ADD (30 men and 30 women) with median age of 59 years (53-65 years). All persons included in the study underwent 24-hour ambulatory BP monitoring (ABPM) and assessed the arterial stiffness parameters and CAP.Results. Comparative evaluation of ABPM in the group of patients with HTN and ADDs revealed more pronounced pathological changes in the 24-hour BP profile compared to those in the control group. Andro- and menopause with a combination of HTN and ADDs characterized by significantly higher ABPM parameters than HTN without ADDs (regardless of the sex). At the same time, in the group of men with HTN and ADD in andropause, unfavorable changes in the main arterial stiffness parameters and CAP were more significant than in women with HTN and ADD during menopause (p<0,05). In the control men groups, in comparison with women, more pronounced unfa­vo­-rable changes in certain vascular stiffness indicators, CAP and ABPM were recorded.Conclusion. In men and women in periods of andro- and menopause with HTN and ADDs, the features of arterial stiffness, CAP, and 24-hour blood pressure profile were verified in comparison with patients with HTN without ADDs. At the same time, the severity of unfavorable changes in the studied parameters in men with depression in andropause is more significant than in menopausal women.