bluuebunny/crossref_metadata_2025 huggingface dataset:
A Wide Conversion Ratio Bidirectional Modified SEPIC Converter with Non dissipative Current Snubber
Authors:   Electrical and Electronics Engineering, Dr. Mahalingam College of Engineering and Technology, India., R Selciya , V.K Rakesh , E.A Harini , L Chitra
Published: May 2023

This article presents a wide conversion ratio bidirectional dc-dc converter based on a bidirectional modified Single-ended primary-inductor converter (SEPIC converter). A key feature of this modified SEPIC converter is the non-dissipative current snubber circuit, which is used to achieve zero current switching and to suppress voltage spikes that occur during MOSFET switching. The snubber is made up of a capacitor, an inductor, and a diode that work together to form a resonant circuit that absorbs the voltage spike and returns it to the circuit without dissipating it. Even with conventional MOSFETs, high efficiency is achieved. The SEPIC converter differs from other bi-directional DC-DC converters in that it provides continuous output current, has fewer components, and can provide high conversion ratios of step-up and step-down voltage without exceedingly low or high duty-cycle. This paper presents a theoretical analysis with stages of operation in both step-up and step-down modes, theoretical waveforms, and the design procedure, as well as a comparison with other bidirectional dc-dc converter topologies. The experimental results are presented to validate the performance of the proposed converter using a 500-W prototype with Voltage Source V1 = 48 V and Voltage SourceV2 = 300 V.
ANALYSIS OF TiFe INTERMETALLIC COMPOUND BY DFT
Authors: TAŞ Emre , KARS DURUKAN İlknur , ÇİFTCİ Yasemin
Published: May 2023

The structural, mechanical, anisotropy, and optical properties of the TiFe compound, which is the effective hydrogen storage material, were analyzed using the DFT method with the CASTEP program. The elastic constants of the cubic system, which have been determined by the stress-strain method, are stable according to the Born stability criteria. According to the mechanical properties, the compound was brittle and hard. Anisotropy properties were examined in 2D and 3D with the EIAM code. Finally, the optical properties using the complex dielectric function based on the electronic structure of TiFe; parameters such as dielectric constants, reflectivity, extinction coefficient, refractive index, and loss function were examined in the range of 0-50 eV. Generally, our obtained results are comparable with literature values.
MULTI-METAL RECOVERY FROM FLOTATION TAILINGS WITH CITRIC ACID ON THE NACl MEDIA
Authors: YOĞURTCUOĞLU Emine
Published: May 2023

After the flotation process of oxidized lead-zinc ores, the high amount of metal (especially zinc metal) in its content cannot be recovered and is stored as waste. Ore and (therefore) tailings are found together with gangue minerals such as calcite, and dolomite, which are oxide/carbonate minerals. Precious minerals are zinc, lead, silver, and iron-containing minerals such as smithsonite, hydrozincite, plumbojarosite, and goethite. The particle size of the sample taken from this waste was determined as d80= 78.22µm. In order to recover these ore wastes with high metal content, the dissolution of citric acid, which is a weak organic acid, in NaCl medium was investigated. When the study was examined at a concentration of 0.5 M citric acid and 200 g/L NaCl, for 1 hour at 60 ℃, 10% solids, it was found that 66.85% Zn, 56.53% Pb, 40.68% Ag, and 27.74% Fe were dissolved. According to the results of this experiment, keeping each of these parameters constant, 0.125-1 M citric acid, 50-400 g/L NaCl, 15-120 minutes leaching time, 25-95 ℃ leaching temperature, and 5-40% solids metal. The efficiency of the gain yields was tried to be determined. When the final results are examined, there are 60-80% zinc, 40-70% lead, 0.01-35% iron, and 11-83% silver recovery efficiencies. In light of these results, it is thought that industrial-scale improvements in multi-metal recovery from oxidized ore wastes may improve positive results.
ALTERED NUMBERS OF LUCAS NUMBER SQUARED
Authors: KÖKEN Fikri , KANKAL Emre
Published: May 2023

We investigate two types altered Lucas numbers denoted and defined by adding or subtracting a value from the square of the Lucas numbers. We achieve these numbers form as the consecutive products of the Fibonacci numbers. Therefore, consecutive sum-subtraction relations of altered Lucas numbers and their Binet-like formulas are given by using some properties of the Fibonacci numbers. Also, we explore the gcd sequences of r–successive terms of altered Lucas numbers denoted and , , according to the greatest common divisor (gcd) properties of consecutive terms of the Fibonacci numbers. We show that these sequences are periodic or Fibonacci sequences.
ESTIMATION OF EDSS FROM EEG SIGNALS OF MULTIPLE SCLEROSIS PATIENTS
Authors: ŞAŞMAZ KARACAN Seda , SARAOĞLU Hamdi Melih , CANBAZ KABAY Sibel
Published: May 2023

Multiple sclerosis (MS) is an autoimmune, neurodegenerative, chronic disease that affects the central nervous system and manifests itself with attacks. Although there is no definite cure for the disease, it is possible to control these attacks. Follow-up of the disease has great importance in terms of disability. An Extended Disability Status Scale (EDSS) is used to show how much the disease affects. This score is determined by specialized clinicians. In this study, the EDSS score, previously determined by neurologists, was attempted to be estimated using the EEG signals. 32-channel EEG signals were recorded while 17 MS patients with EDSS 1.0, 1.5, and 2.0 were performing a working memory task. Using the band power of these 6-minute EEG signals, EDSS estimation was performed with the Decision Tree Regressor, resulting in a Mean Absolute Error (MAE) of 0.088. With the Leave One Out Cross-Validation, 17 trees were extracted and 12 were found to be identical. As a result, the band power features of F7 and CP2 EEG channels were found to be successful in predicting 3-level EDSS scores with a decision tree regressor with 0.0 MAE. Additionally, the relationship between the scores obtained in the working memory task and the EDSS scores of MS patients was statistically calculated with One-way ANOVA. There was no significant difference between the EDSS score and the task scores (p>.05).
Indumentaria, jaeces y adorno a finales de la Edad Media: artefactos de base cobre del castillo de la Estrella de Montiel (Ciudad Real)
Authors: Molero García Jesús Manuel , Gallego Valle David , Hernández-Casas Yaiza
Published: May 2023

En este artículo presentamos el estudio de los artefactos de base cobre hallados en las excavaciones del vertedero excavado en la fortaleza de La Estrella de Montiel (Ciudad Real), ubicado en la zona oriental de la puerta de Hierro del castillo, con una estratigrafía vinculada a los últimos momentos de ocupación de la fortaleza en la Baja Edad Media. Nos centramos, en concreto, en el conjunto de piezas relacionadas con la indumentaria, los jaeces y el adorno, dada la excepcionalidad del hallazgo en contexto arqueológico que permite contribuir al conocimiento de la cultura material metálica medieval de la Península Ibérica.
«Post pias causas, de familiaribus fiat mencio»: las mandas testamentarias de los obispos castellanos bajomedievales en favor de sus familiares de sangre
Authors: González Nieto Diego
Published: May 2023

Los obispos, como otros miembros del clero secular, mantuvieron un estrecho vínculo con sus grupos familiares. Ello los llevó a actuar como individuos concretos pertenecientes a familias de poder y como participantes e impulsores de sus estrategias de ascenso y reproducción social. Los testamentos y últimas voluntades de los mitrados constituyen una fuente fundamental para el estudio de sus diferentes actuaciones en favor de sus parientes sanguíneos. El objetivo de este artículo es analizar e interpretar las mandas testamentarias de los obispos castellanos bajomedievales en favor de aquellos. Se ha comprobado que los obispos solían destinar una parte significativa de sus bienes a proporcionar posibilidades de reproducción y ascenso social a sus parientes más desprotegidos por las prácticas sucesorias de la nobleza y de las oligarquías urbanas. Por otro lado, las últimas voluntades de los obispos se han mostrado insuficientes para estudiar una de sus actuaciones más comunes en este sentido: sus prácticas nepotistas.
Estructura y condicionantes del gasto militar directo en la Edad Media. El reino de Valencia y la Guerra de los Dos Pedros como caso de estudio
Authors: Sanahuja Ferrer Pablo
Published: May 2023

El presente artículo pretende estudiar el gasto bélico en la Edad Media y los condicionantes que determinaban su estructura y aplicación. A partir de un caso de estudio concreto, la Guerra de los Dos Pedros, y de un escenario particular, el reino de Valencia a mediados del siglo XIV, este estudio analiza todas las partidas que constituían el gasto bélico, ofreciendo estimaciones y analizando su estructura para determinar las implicaciones de su principal condicionante, su control por la nobleza.
«Ad conservationem iuris Domini Episcopi». El notario como agente episcopal en la Cataluña del siglo XIV: el caso de la Bisbalia de Girona
Authors: Saura Nadal Jordi
Published: May 2023

El objetivo del estudio es poner de relieve el papel central de la institución notarial dentro de la diócesis medieval, tomando como ejemplo la región catalana del Baix Empordà (Girona), en el siglo XIV. En concreto, se pretende explicar la importancia del notario no solo como garante de la fides publica, sino también como un elemento fundamental del engranaje administrativo de los dominios territoriales del obispado. Mediante el estudio de la documentación episcopal y notarial disponible, se pone énfasis en la figura del notario como pieza clave del ejercicio del dominio señorial sobre la población a través, en especial, del fenómeno de la escritura.
In the City and Countryside. The Establishment and Definition of the Parish Network in the Diocese of Lisbon (12th-15th Centuries)
Authors: Farelo Mário
Published: May 2023

The conquest of Lisbon, in October 1147, marked a new period for the territories of Islamic al-Ušbūna. The now Christian rulers oversaw the changes within the social fabric of the city through the arrival of new elites and the exodus of part of the previous inhabitants, now perceived as ethnic and religious minorities, alongside the transfer of property and appropriation of space. In these urban processes, as with others, the rare information available underlines the role of the new ecclesiastical authorities in the forefront of a necessary institutionalization. The creation of a parish network was part of the latter, with a cadence and comprehensiveness that are still poorly known. This paper intends to re-evaluate the historical treatment of this question, drawing from existing research and new source material. It argues that the process of parochialization in the Lisbon diocese took root very quickly in urban and suburban nuclei, while extending only later to newly-cleared land areas, mostly under the dependence of urban churches. From the middle of the thirteenth century, this process runs in parallel with the necessity to better define their boundaries, which left a document trail spanning until at least the end of the Middle Ages.
Introducción. La configuración del espacio diocesano: el territorio y sus agentes
Authors: Agúndez San Miguel Leticia , García Izquierdo Iván
Published: May 2023

Introducción del dossier.
«Fyge esta carta en testemeya de verdade e pui y meu siñal acustumado»: los orígenes del notariado público en torno a los monasterios cistercienses de la diócesis de Lugo (siglo XIII)
Authors: Piñeiro Pedreira Sandra
Published: May 2023

En los antiguos reinos de León y Castilla, la implantación del notariado público tuvo lugar en los años centrales del siglo XIII, con la renovación jurídica de cuño alfonsí. Un ambicioso proyecto, desarrollado a distinto ritmo en los territorios peninsulares, a cuyo conocimiento busca contribuir el presente estudio. Para ello, vamos a analizar su evolución en la documentación privada de los monasterios cistercienses de la diócesis de Lugo – en concreto, Santa María de Meira, Santa María de Penamaior y Santa María de Ferreira de Pantón– , desde los primeros scriptores particulares conocidos, tanto clérigos como laicos de libre profesión, que perviven durante los siglos XII – med. s. XIII (c. 1143-1265), hasta la consolidación definitiva de la institución notarial y el instrumento público en las décadas finales de esta centuria (a partir de 1265).
La identificación de características escriturarias carolinas en la datación de documentos leoneses altomedievales
Authors: Gutiérrez César
Published: May 2023

En este trabajo se examina la documentación del Reino de León de los siglos IX al XI con el propósito de identificar rasgos carolinos. En concreto, se analizan las colecciones de la Catedral y de los monasterios de Sahagún, Eslonza y Otero de las Dueñas en busca de ejemplos de la secuencia gráfica mpn. La amplitud del fondo documental leonés para la Alta Edad Media ha permitido testar la hipótesis de si esta secuencia gráfica es un atributo carolino o si por el contrario es una característica compartida entre la letra visigótica y la carolina. El análisis de los datos arroja la conclusión de que mpn es un elemento carolino en la escritura visigótica introducido en ella desde mediados del siglo XI. Asimismo, por medio de la revisión de las colecciones analizadas se ha podido alertar sobre errores de transcripción en las ediciones existentes de varios documentos, así como catalogar como copias de la segunda mitad del siglo XI diplomas que hasta ahora se tenían por originales del siglo X. Estos resultados contribuyen a la descripción del proceso de sustitución de la escritura visigótica por la carolina en la Península Ibérica.
Reseñas
Authors: AA. VV.
Published: May 2023

Reseñas varios autores
Evaluating Three Machine Learning Classification Methods for Effective COVID-19 Diagnosis
Authors: Salman Akbal Omran , Geman Oana
Published: May 2023

SARS-CoV2, which produces COVID-19, has spread worldwide. Since the number of patients is rising daily, it requires time to evaluate laboratory data, limiting treatment and discoveries. Such restrictions necessitate a clinical decision-making tool with predictive algorithms. Predictive algorithms help healthcare systems by spotting disorders. This study uses machine learning and laboratory data to predict COVID-19 patients. Recall, Precision, accuracy, and AUC ratings assessed our models' prediction performance. Models were verified with 10-fold cross-validation and train-test split methods using 18 laboratory data from 600 patients. This research compared three different classification approaches—Support Vector Machines (SVM), artificial neural networks (ANN), and k-Nearest Neighbors (k-NN). According to the findings, SVM achieved the most significant average accuracy (89.3%), followed by ANN (88.5%) and kNN (86.6%). The accuracy rates of all three approaches were relatively reasonable, with SVM being the best of the bunch. The results of this research indicate that classification using machine learning methods has the potential to be used in developing reliable COVID-19 diagnosis systems, thereby facilitating the fast and accurate diagnosis of COVID-19 cases and facilitating proper therapy and management of COVID-19 patients. More work might be done to refine these techniques and include them in useable diagnostic frameworks.
Upaya Penguatan Kualitas Kesehatan Dalam Pencegahan Penyakit Degeneratif
Authors: MS Dewi Sartika , Junaidin Junaidin , Kurniawati Kurniawati , Samila Samila , Malaha Naomi , Sima Yenni
Published: May 2023

Penyakit degeneratif disebabkan oleh kebiasaan individu dalam menjalani kehidupan sehari-hari dimulai dari aktivitas hidup serta makanan yang dikonsumsi. Penyakit degeneratif diantaranya stroke, penyakit jantung koroner, hipertensi, kolesterol, diabetes mellitus dan obesitas. Kasus penyakit degeneratif juga merupakan penyakit terbesar yang menyebabkan kematian dan kecacatan di seluruh dunia. Kegiatan pengabdian masyarakat ini merupakan upaya untuk penguatan kualitas kesehatan masyarakat di desa Japing-Japing Kelurahan Bonto Langkasa Kec.Minasatene Kab.Pangkajene dan Kepulauan. Kegiatan ini berjalan dengan baik dan disambut antusias oleh masyarakat dan tujuannya untuk meningkatkan pengetahuan masyarakat tentang informasi kesehatan yang berkaitan dengan penyakit degeneratif dengan pemaparan materi dan diskusi dengan masyarakat. Kegiatan diikuti oleh 19 peserta diluar dari kader dan tenaga kesehatan yang sempat hadir. Kegiatan pengabdian masyarakat ini dapat disimpulkan bahwa masyarakat mulai mengerti dan memahami dan terlebih lagi menambah pengetahuan tentang penguatan kualitas kesehatan terhadap penyakit degeneratif. Dan masyarakat mampu mengendalikan kesehatan dengan baik guna mencapai derajat kesehatan yang lebih baik dengan upaya preventif dan kuratif.
Reflexões sobre o conceito de microprática
Authors: Cavallari Pedro Henrique Villi , Lampert Jociele
Published: May 2023

Este artigo consiste em apresentar levantamento teórico e apontamentos metodológicos sobre o conceito de microprática, considerando o espaço de ensino e aprendizagem nas artes visuais e o estúdio de pintura como um laboratório. Considera-se em aproximação, conceitos sobre o termo microprática em áreas de conhecimento dispares e correlatas, porém, o adensamento teórico estudado destaca a significação do procedimento metodológico em relação a arte e arte educação, a pensar a microprática (pictórica) a partir da introdução de seu estabelecimento conceitual (teórico e prático) no contexto do Estúdio de Pintura Apotheke, que se configura como um Programa de Extensão Permanente vinculado, à Universidade do Estado de Santa Catarina e em crescente perspectiva com ações interdepartamentais, interinstitucionais e internacionais, que compõem redes de melhores práticas e ações. Em todas as aproximações destaca-se, com originalidade, o conceito com base na arte como experiência (Dewey, 1934).
Processo poético e os espaços de produção na arte contemporânea: experiências de artista
Authors: Pellegrin Ricardo de , Stumm Rebeca Lenize
Published: May 2023

No presente estudo, parto da compreensão de que a Arte Contemporânea pode ser produzida em diferentes espaços, sendo eles institucionais ou não. O texto apresenta-se estruturado da seguinte forma: primeiramente, relaciono as experiências poéticas desenvolvidas em momentos distintos da minha trajetória artística com os desvios intrínsecos originados em cada contexto em que os projetos foram idealizados e realizados. Em seguida, considero que os projetos, aqui mencionados, reverberam a potencialidade para se pensar formas experimentais de vivenciar a produção artística por meio de colaboração, para, então, concluir que os espaços de produção e exposição das Artes Visuais na atualidade interferem diretamente nas possibilidades de agenciamentos de estratégias de colaboração como poética. Deste modo, para além das galerias de arte e dos museus, os ateliês e as salas de aula podem ser considerados importantes lugares de produção e apresentação da Arte Contemporânea.
A potência pictórica da deformação na produção sensível de devires-outros
Authors: Cirilo Débora Curti , Parpinelli Roberta Stubs
Published: May 2023

É possível criar devires-outros através da deformação da imagem do sujeito? Explorando a mistura entre as linguagens da pintura e da fotografia, investigamos essa possibilidade artisticamente através de criações de deformações em transparências. A deformação é aqui entendida enquanto potência pictórica disruptiva – meio potente de suspensão do sujeito em favor do devir, a partir da Lógica da Sensação proposta por Gilles Deleuze em seu livro sobre o pintor Francis Bacon. Como processo, são criadas deformações em folhas de acetatos transparentes e em vidros, experimentando seus desdobramentos fotográficos através de sobreposições em diferentes e múltiplos sujeitos. A fotografia é proposta aqui como poesia, segue os rastros de Adolfo Montejo Navas, tensionando as fronteiras entre realidade e ficção, aproximando arte e vida assim como o fez a artista Helena de Almeida. Esses atravessamentos entre diferentes linguagens artísticas e entre diferentes sujeitos perseguem o movimento de devir-outro através da imagem. Filosofia e arte se articulam nessa busca por pensamentos e sensações que nos desloquem de nós mesmos, busca que não tem um fim em si, pois está sempre em processo de transformação.
Image fusion technique using flat panel detector rotational angiography for transvenous embolization of intracranial dural arteriovenous fistula
Authors: Choi Jai Ho , Shin Yong Sam , Kim Bum-soo
Published: May 2023

Precise evaluation of the feeders, fistulous points, and draining veins plays a key role for successful embolization of intracranial dural arteriovenous fistulas (DAVF). Digital subtraction angiography (DSA) is a gold standard diagnostic tool to assess the exact angioarchitecture of DAVFs. With the advent of new image postprocessing techniques, we lately have been able to apply image fusion techniques with two different image sets obtained with flat panel detector rotational angiography. This new technique can provide additional and better pretherapeutic information of DAVFs over the conventional 2D and 3D angiographies. In addition, it can be used during the endovascular treatment to help the accurate and precise navigation of the microcatheter and microguidwire inside the vessels and identify the proper location of microcatheter in the targeted shunting pouch. In this study, we briefly review the process of an image fusion technique and introduce our clinical application for treating DAVFs, especially focused on the transvenous embolization.
An updated earthquake catalog for Bangladesh: an attempt at a seismic risk evaluation
Authors: Salman Md Abdullah , Nomaan Md Saleh Shakeel , Saha Ayon
Published: May 2023

A unique, consistent, and uniform earthquake catalog is crucial for assessing seismic hazards in any locality. This study aims at compiling and processing a better uniform earthquake catalog, using this catalog to identify the probable subduction zone, and assessing seismicity parameters for Bangladesh. The study area is bounded by the geographical limits 16–29°N and 86–96°E. It includes a sum of 48,342 events which are compiled as 1.0 to 8.5 magnitudes (MW) and time period from 1548 to 2020 yrs. Uniformization is made between the body, surface wave, and moment magnitude scales to unify the catalog in terms of MW. For seismic hazard assessment or prediction studies, this catalog comprises earthquake events from Bangladesh and adjoining regions. The assessed MC obtained is around 4.0–5.0, which leads to a, b value varying between 0.71–1.12 and an a value varying between 4.85–7.12. The findings show that the MC is lower at the border of the Chittagong-Sylhet through Hill tracts than the northern part of the area with an MC 4.5–5.0 and a, b value close to 1.00. The results indicate that the study area is a seismically highly active zone in the context of seismicity parameters. Finally, the compiled catalog, seismicity of the area and a probable deformation front are presented and are recommended for use in assessing seismic hazard analysis in Bangladesh.
Operators induced by certain hypercomplex systems
Authors: Alpay Daniel , Cho Ilwoo
Published: May 2023

In this paper, we consider a family \(\{ \mathbb{H}_{t}\}_{t\in\mathbb{R}}\) of rings of hypercomplex numbers, indexed by the real numbers, which contain both the quaternions and the split-quaternions. We consider natural Hilbert-space representations \(\{(\mathbb{C}^{2},\pi_{t})\}_{t\in\mathbb{R}}\) of the hypercomplex system \(\{ \mathbb{H}_{t}\}_{t\in\mathbb{R}}\), and study the realizations \(\pi_{t}(h)\) of hypercomplex numbers \(h \in \mathbb{H}_{t}\), as \((2\times 2)\)-matrices acting on \(\mathbb{C}^{2}\), for an arbitrarily fixed scale \(t\in\mathbb{R}\). Algebraic, operator-theoretic, spectral-analytic, and free-probabilistic properties of them are considered.
Acoustic field fluctuation caused by source-generated internal waves and its detection method
Authors: He Zhao-Yang , Lei Bo , Yang Yi-Xin ,   School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China,   Qingdao Research Institute, Northwestern Polytechnical University, Qingdao 266200, China
Published: May 2023

The development of noise reduction and silencing technology has brought great difficulties to underwater target detection, and more target characteristics need further studying. When a submerged target travels through density-stratified environment, the fluid will oscillate behind the target owing to gravity and buoyancy and generate internal waves, which are often referred to as source-generated internal waves. These internal waves are difficult to eliminate, which can cause the sound speed profiles to fluctuate. Therefore, these internal waves are expected to be effective for detecting underwater target. In this paper, the fluctuations of the received sound passing through the internal waves produced by a moving sphere are investigated. A typical shallow stratified environment is set up, and internal wave fields generated by a sphere moving in many horizontal directions are simulated. According to the simulation results, these internal wave fields have a much wider range than the scenario of the target body. Based on the relationship between the amplitude of the internal wave and the variation of sound speed, range–dependent sound speed profiles are constructed, and model based on ray acoustics is used to analyze the aberration strength of passing sound fields. Results show that the strength aberration is inversely proportional to the target passing angle, and these characteristics can be covered by the background. Focusing on this problem, an extraction method based on principal component analysis with sliding window is then proposed. The uncorrelation between the disturbance of internal wave and background signal is utilized, and interference is suppressed by removing the component in No.1 principal component space, and retaining the No.2–No.k subspace. Detection can be executed based on multi period received data from single hydrophone. A lake experiment is conducted to verify the performance. A detection scenario of single source and single receiver is established, and the AUV target crosses source–receiver line multiple times. The research results show that the detection scheme based on the acoustic aberration of source-generated internal wave has potential for underwater target detection, possessing the advantages of wide coverage and high robustness. Data on multi depths are processed to show that the detection performance is dependent on the depth of system. Since the acoustic strength variations are derived form local disturbance in channel, the proposed method may be affected by severe environment fluctuation, and further research is still needed.
Citation analysis of computer systems papers
Authors: Frachtenberg Eitan
Published: May 2023

Citation analysis is used extensively in the bibliometrics literature to assess the impact of individual works, researchers, institutions, and even entire fields of study. In this article, we analyze citations in one large and influential field within computer science, namely computer systems. Using citation data from a cross-sectional sample of 2,088 papers in 50 systems conferences from 2017, we examine four research areas of investigation: overall distribution of systems citations; their evolution over time; the differences between databases (Google Scholar and Scopus), and; the characteristics of self-citations in the field. On citation distribution, we find that overall, systems papers were well cited, with the most cited subfields and conference areas within systems being security, databases, and computer architecture. Only 1.5% of papers remain uncited after five years, while 12.8% accrued at least 100 citations. For the second area, we find that most papers achieved their first citation within a year from publication, and the median citation count continued to grow at an almost linear rate over five years, with only a few papers peaking before that. We also find that early citations could be linked to papers with a freely available preprint, or may be primarily composed of self-citations. For the third area, it appears that the choice of citation database makes little difference in relative citation comparisons, despite marked differences in absolute counts. On the fourth area, we find that the ratio of self-citations to total citations starts relatively high for most papers but appears to stabilize by 12–18 months, at which point highly cited papers revert to predominately external citations. Past self-citation count (taken from each paper’s reference list) appears to bear little if any relationship with the future self-citation count of each paper. The primary practical implication of these results is that the impact of systems papers, as measured in citations, tends to be high relative to comparable studies of other fields and that it takes at least five years to stabilize. A secondary implication is that at least for this field, Google Scholar appears to be a reliable source of citation data for relative comparisons.
ВЗВЕШЕННОЕ ВЕЩЕСТВО ВОД ОТ ЦИМЛЯНСКОГО ВОДОХРАНИЛИЩА ДО ТАГАНРОГСКОГО ЗАЛИВА В ПЕРИОД ДЛИТЕЛЬНОГО МАЛОВОДЬЯ 2006–2020 гг., "Наука юга России"
Authors: Клещенков А.В. , Герасюк В.С. , Кулыгин В.В. , Бердников С.В.
Published: May 2023

Приведены результаты анализа массива многолетних натурных наблюдений и дана оценка содержания взвешенного вещества в водном континууме Цимлянское водохранилище – Нижний Дон – дельта Дона – Таганрогский залив в период длительного маловодья 2006–2020 гг. По материалам экспедиций с 2006 по 2020 г. выполнена оценка пространственного распределения концентрации общего взвешенного вещества по районам совместно с сопутствующими параметрами, представляющими органическую компоненту природных вод, такими как содержание растворенного органического углерода, взвешенного органического углерода и хлорофилла а. Дана оценка межгодовому и сезонному изменению взвешенного вещества, рассмотрены соотношения между содержанием взвешенного вещества и взвешенными органическими компонентами вод. Определены характерные значения концентраций взвеси и ее гранулометрического состава для целей гидродинамического моделирования динамики взвеси в устьевой области Дона. Концентрации взвешенного вещества изменяются по районам водного континуума и в целом увеличиваются при движении от Цимлянского водохранилища к Таганрогскому заливу Азовского моря. Годовой ход содержания взвешенного вещества обусловлен влиянием гидродинамики и активным цветением микроводорослей. Результаты анализа многолетних данных гранулометрического состава взвешенных наносов в весенне-летний период на гидропосту в станице Раздорской свидетельствуют о значительной изменчивости состава взвеси, которая проявляется преимущественно в изменении соотношения мелкодисперсных фракций – пелита и алеврита. Приведены сведения, показывающие, что гранулометрический состав взвеси подвержен влиянию ветрового взмучивания и росту сдвиговых напряжений в условиях формирования значительных уклонов водной поверхности. Для руслового участка реки до вершины дельты характерно преобладание алевритовой фракции. Взвесь, наблюдающаяся в период штормов, преимущественно состоит из пелита.
ДИНАМИКА ДЕМОГРАФИЧЕСКОЙ НАГРУЗКИ НА ОКРУЖАЮЩУЮ СРЕДУ В ПРИБРЕЖНЫХ МУНИЦИПАЛЬНЫХ ОБРАЗОВАНИЯХ НИЖНЕГО ДОНА, "Наука юга России"
Authors: Хорошев О.А. , Меринова Ю.Ю. , Степаньян О.В.
Published: May 2023

Произведена оценка демографической нагрузки на окружающую среду в прибрежных муниципальных образованиях Нижнего Дона в динамике за десятилетний период. В пределах исследуемой территории расположены пять городских округов с крупными промышленными зонами, а также 8 городских и 72 сельских поселения, входящих в состав 17 сельских муниципальных районов Ростовской и Волгоградской областей. Как в 2011 г., так и в 2021 г. отмечалась высокая концентрация населения и, закономерно, интенсивность его воздействия на окружающую среду в пределах традиционно привлекательного для мигрантов областного центра – г. Ростова-на-Дону – и ряда соседствующих с ним городских и сельских поселений Азовского, Мясниковского и Аксайского районов, а также Семикаракорского, Цимлянского (Ростовская область) и Суровикинского (Волгоградская область) городских поселений. Большинство нижнедонских прибрежных поселений не демонстрировало увеличения показателя демографической нагрузки, а в отдельных случаях было отмечено ее значительное снижение. Так, в 2021 г., в отличие от показателей десятилетней давности, на исследуемой территории не осталось муниципальных образований с высокими значениями демографической нагрузки (18–20 баллов), что связано прежде всего с естественной и миграционной убылью населения. Все без исключения прибрежные города и сельские поселения Нижнего Дона характеризуются депопуляцией. Значительное снижение демографической нагрузки (на три и более балла) было отмечено не только в 16 сельских поселениях Ростовской и Волгоградской областей, но и в трех городских округах Ростовской агломерации – Азове, Батайске и Новочеркасске.
A Study on the Impact of COVID on Farm Sector Higher Education and Employment
Authors: Sebastian Shibi , Sekar C. , Anuratha A. , Dev P. Ahila
Published: May 2023

The issue of the COVID-19 and its impact on higher education is an emergent focus of debate across the globe. Higher education sectors all over the world are exceptionally disordered and disrupted radically and students are struggling a lot to navigate this crisis. An Analysis of Higher Education, Placement, Employment and Earning Contours of TNAU Farm graduates during the Pre and Post COVID 19 Regimes was conducted with the following objectives.

For the present study, 372 past candidates were contacted. Data was collected by mailed Questionnaire. The issue of the COVID-19 and its impact on higher education is an emergent focus of debate across the globe. Higher education sectors all over the world are exceptionally  disordered and disrupted radically and students are struggling a lot to navigate this crisis.

Among the respondents 57 per cent were girls and 43 percent were boys. Around 42 per cent of the graduates were from rural background, 31% from urban and remaining from peri-urban areas.  Over 61 per cent of the passed out graduates were preparing for competitive examinations, 26 per cent were pursuing higher education and only 13 per cent were employed. The percentage of graduates doing higher education and employed has reduced by nearly 50 percent during the COVID. All the students were employed within India during the pre and post COVID period and the difference between these periods was negligible. However it could be noted that the number of graduates being employed in private sector reduced drastically in the first year of Covid while it increased by 35 percent during the second year after CoVID. The choice of jobs were prioritized in the following preference. They were Salary, passion and job security. However it can be found that the job security aspect has reduced by 20 percent in the Covid situation. About 59 per cent indicated that their jobs were not secured and 36 per cent expressed that they found it difficult to get admission in national and international institutions due to covid pandemic and 17.2 per cent indicated that they were not able to pursue education in National and International institutions even after getting admissions and fellowships. COVID has impacted higher education and job prospect in abroad and far way places.
Genetic Divergence on Chickpea (Cicer arietinum L.) Genotypes Grown under Late Sown Conditions
Authors: Singh Pankaj Kumar , Nath Shiva , Dubey Shivam , Mishra Paridhi , Kuswaha Chandramani
Published: May 2023

In the current experiment, 102 chickpea.germplasm showed wide range of variation for various characters were evaluated during Rabi 2017-18 along with BG 372, Udai and Pant G 186 as checks varieties in Augmented Block Design at Agronomy Research Farm of Acharya Narendra Deva University of Agriculture and Technology, Narendra Nagar (Kumarganj), Ayodhya (U.P.). The observations were recorded on 11 quantitative characters viz., days to 50 per cent flowering, days to maturity, primary branches per plant, secondary branches per plant, plant height (cm), pods per plant, seeds per pod, biological yield per plant (g), seed yield per plant (g), harvest index (%) and 100-seed weight (g). A statistical investigation of each character's genetics yielded a number of results.  Higher seed yield per plant was generated by genotypes GJG 1416, followed by BG 256, GJG 1416, PhuleG0819. Seed yield per plant had positive and extremely significant associations with secondary branches per plant, pods per plant, seeds per pod, biological yield per plant, harvest index, and 100-seed weight.  Primary branches per plant were shown to have positive significant associations with seed output per plant, where as plant height was determined to be non-significant. It showed a poor, non-significant correlation with the number of days until 50% blooming and the number of days till maturity. Biological yield per plant (g) and the Harvest index were found to be significant direct components of seed yield per plant by path analysis. The traits mentioned above that were significant direct and indirect components ought to be taken into account when creating a chickpea selection strategy that would produce high yielding varieties. The 11 clusters formed in divergence analysis contained genotypes of heterogeneous origin there by indicating no parallelism between genetic and geographic diversity. In this context, the maximum inter-cluster distance was recorded between cluster X and XI (12.201) followed by cluster III and XI (11.254), cluster VI and XI (11.125) and cluster VII and XI (10.875). Therefore, crosses between members of cluster separated by high inter-cluster distances are likely to throw desirable segregants.
Mathematical Models and Societal Impact of COVID-19 Pandemic: A Short Review
Authors: Bhattacharyya Achintya , Mukherjee Joy
Published: May 2023

In this article we present a short and informative review on growth and impact of novel corona virus appeared in 2019. Almost entire world has been is the victim of this life-threatening virus. Here, we have discussed the growth of the COVID 19 in different parts of the world and how they are mathematically modelled. We have also discussed how different mathematical models predicts the minimisation of the growth by predicting the minimum days of lockdown. Further, the effect of effect of lockdown in everyday life and its societal impact are also highlighted.
A Retrospective Cohort Analysis of the Treatment of Bacterial Pneumonia Pediatric Cases
Authors: Amaral Felipe Lemos Esteves do , Leite Rafael Rodrigues , Bié Sara Maria Gomes , Oliveira Sandriny Maria de Almeida , Lima Guilherme Vieira , Ramalho Alanderson Alves , Ferreira Sávio Benvindo
Published: May 2023

Aims: The present study aims to evaluate the use of antibiotics in the management of bacterial pneumonia in the pediatric sector of a teaching hospital.

Study Design: A retrospective and descriptive cross-sectional study.

Place and Duration of Study: The pediatrics sector of the Julio Bandeira University Hospital (HUJB), Brazil from September 2017 to December 2021.

Methodology: A total of 734 medical records were analyzed, based on two groups: a) For those subjects who adhered to the protocol (AP) and b) for those who did not (DP), which were already recommended in the agreement described in the guidelines of hospital. The data were analyzed in a descriptive and exploratory way to evaluate the distribution and characterize the study population, so that the categorical variables were presented in the form of absolute (n) and relative (%) frequencies, while the continuous variables were evaluated through measures of central tendency and dispersion.

As the data distribution did not adhere to normality, the differences between the proportions of categorical variables were evaluated by the Chi-square test (5% significance level), while the differences between the medians by the U-Mann-Whitney test.

Results: The results found indicate greater effectiveness in the group that followed the institution's protocol (95.93%), as well as less use of antibiotics in therapy, making the majority use of monotherapy (74%), and adequacy to the duration of therapy (OR=1.49). In addition, there was an increase in the use of azithromycin during the Covid-19 pandemic.

Conclusion: The group that adhered to the protocol stood out over the group that did not adhere to the protocol in terms of greater effectiveness. Of treatment, less use of antibiotics and adequate length of stay for the prescribed treatment. Furthermore, a growth in the use of azithromycin was observed during the years of the Covid-19 pandemic.
Survey and excavation at Dunstaffnage Castle, Argyll
Authors: Breen Colin , Forsythe Wes , Raven John , Rhodes Daniel
Published: May 2023

Recent investigations at Dunstaffnage, partially funded by Historic Scotland, have provided additional information regarding the castle's constructional history. Excavations have identified features associated with its initial construction in the 13th century and subsequent refurbishment episodes over the following centuries. Additionally, two medieval lime kilns have been located outside of the castle walls associated with these developments. In the 18th century extensive landscaping took place in the immediate environs of the castle as part of the 'improvement' and redevelopment of the site.
Annual Report for the year 1 July 2009 -31 May 2010
Authors: - -
Published: May 2023

At the Anniversary meeting the Annual Report was delivered covering topics such as Research grants, events, the activities of the Society and publications. The Treasurer also presented the Society’s Financial Review. A list of newly elected Fellows was read, and a list of deceased Fellows from 2009-2010 is included. New members of Council were then elected and the Presidential Address was delivered by Barbara Crawford.
Stuart Maxwell, MA, FSA Scot
Authors: Dalgleish George
Published: May 2023

Stuart Maxwell was born in Edinburgh in 1922 and attended George Heriot’s school; he remained a proud Herioter throughout his life.
'... and they won land among the Picts by friendly treaty or the sword'
Authors: McSparron Cormac , Williams Brian
Published: May 2023

Much recent scholarship has been critical of the concept of a Dál Riatic migration to, or colonisation of, Argyll. Scepticism of the accuracy of the early medieval accounts of this population movement, arguing that these are late amendments to early sources, coupled with an apparent lack of archaeological evidence for such a migration have led to its rejection. It is argued here, however, that this rejection has been based on too narrow a reading of historical sources and that there are several early accounts which, while differing in detail, agree on one point of substance, that the origin of Scottish Dál Riata lies in Ireland. Also the use of archaeological evidence to suggest no migration to Argyll by the Dál Riata is flawed, misunderstanding the nature of early migrations and how they might be archaeologically identified, and it is proposed that there is actually quite a lot of evidence for migration to Argyll by the Dál Riata, in the form of settlement and artefactual evidence, but that it is to be found in Ireland through the mechanism of counterstream migration, rather than in Scotland.
A Scottish Neolithic carved stone ball with enigmatic surface details
Authors: Saville Alan , Grant Eric , Cavers Graeme , Braby Alan
Published: May 2023

A Scottish carved stone ball with unusual surface markings is described and analysed. Although undoubtedly an original prehistoric artefact, it is an unprovenanced find and there is no absolute certainty about the dating and character of its unique markings. Its enigmatic nature, with the possibility of anthropomorphic depiction, presents an interpretative challenge for archaeologists and art historians.
The iconography of the Hunterston brooch and related early medieval material
Authors: Blackwell Alice
Published: May 2023

This paper highlights a new aspect of the design and iconographical programme of the Hunterston brooch. Animals embedded in the form of the brooch terminals flank the cross panel, and are interpreted as a motif rooted in the Canticle of Habakkuk's assertion that Christ would be recognised between two living things. This Old Testament text was given wide meaning by early Christian thinkers, encompassing the central concept of the recognition, the 'knowing' of Christ and thus can be regarded as a fundamentally important subject for expression. Visual expressions of this theme are more prevalent than has been recognised, and occur in different variations across media. Objects that feature the motif include those on the Hunterston and 'Tara' brooches, do not feature figurative depictions of Christ. Instead '“ and in common with Pictish sculpture (but in contrast to Anglo-Saxon and Irish sculpture) '“ a symbol such as the cross or lozenge is used to represent Christ. It is suggested that the depiction of such a central Christian theme might lie behind the motivation to 'close the gap' between the terminals of the Hunterston and 'Tara' brooches. If so, this adaptation would provide a way to depict the motif which simultaneously maintained a visual link with the traditional brooch form whilst highlighting the 'new' Christian element precisely because it was what was added.
Annual Report for the year 1 June 2010–31 May 2011
Authors: - -
Published: May 2023

At the Anniversary meeting the Annual Report was delivered covering topics such as Research grants, events, the activities of the Society and publications. The Treasurer also presented the Society’s Financial Review. A list of newly elected Fellows was read, and a list of deceased Fellows from 2010-2011 is included. New members of Council were then elected and the Presidential Address was delivered by Barbara Crawford.
Alexander Fenton
Authors: Cheape Hugh
Published: May 2023

Alexander – ‘Sandy’ – Fenton was a scholar and teacher who has had a profound influence on many areas of Scottish and European studies and museums, not least through the extensive corpus of his written and published work.