bluuebunny/crossref_metadata_2025 huggingface dataset:
Intercâmbio internacional na era COVID-19
Authors: Silva Rodrigo Alberton da , Silva Filho Carlos Rodrigues da
Published: January 2021

Problema: O intercâmbio internacional é um excelente instrumento de formação para estudantes e Portugal apresenta diversas vantagens para os alunos brasileiros. No entanto, a literatura brasileira carece de relatos de experiência sobre tais atividades e os estudantes frequentemente encontram- se preocupados sobre quais atividades serão desenvolvidas, sobre que tipo de sistema de saúde encontrarão e, recentemente, sobre como a pandemia se desenrolou no país de destino. Métodos: Trata-se de um estudo descritivo, do tipo relato de experiência, referente a um estágio internacional na área da saúde, realizado por um acadêmico brasileiro em Portugal. O trabalho foi elaborado a partir de pesquisas bibliográficas e resgate mnemônico da experiência. Resultados: O sistema de saúde português funciona de forma semelhante ao brasileiro, baseado na atenção primária à saúde e na descentralização, e apresentou bom desempenho em relação à pandemia da COVID-19. O intercâmbio foi realizado na área de medicina geral e familiar e de medicina de emergência pela Universidade de Lisboa, no início de 2020, e foi composto por uma vasta gama de atividades desenvolvidas, principalmente o acompanhamento de consultas. Os aprendizados do estágio incluem os conteúdos técnicos das consultas acompanhadas, os conhecimentos não científicos ensinados durante a rotina e as experiências sociais vivenciadas na viagem. Conclusão: Os estudantes brasileiros encontrarão familiaridades e diferenças positivas no sistema de saúde português e observarão excelentes números em relação ao controle da pandemia da COVID-19. O intercâmbio em Portugal possibilitou o crescimento profissional e pessoal do estudante e é recomendado para os estudantes brasileiros da área da saúde interessados em uma experiência transcultural.
ASSOCIATION BETWEEN SLEEP QUALITY AND LIFESTYLE HABITS OF COLLEGE STUDENTS
Authors: Araujo Monique , Turi-Lynch Bruna , Fernandes Rômulo , Codogno Jamile , Zanuto Everton
Published: January 2021

The aim of this study was to verify sleep quality, as well as its determinants, among college students of a private university in Brazil. The sample consisted of 303 college students. Sleep quality was assessed by the Mini-sleep Questionnaire,and other variables included current physical activity, previous physical activity, sedentary behavior, bodymass index, alcohol consumption, smoking, and employment. We found a significant association between bad sleep quality and body mass index (p=0.001), alcohol consumption (p=0.001), smoking (p=0.005) and employment (p=0.030). However, having a job was considered a protective factor for bad sleep quality (OR=0.66 [0.40;0.98]), regardless of other factors. College students present a high prevalence of altered sleep, having as determinants alcohol consumption, smoking, overweight, and obesity. On the other hand, being employed was shown to be a protective factor for bad sleep quality.
O impacto da transformação digital na institucionalização de metodologias ágeis
Authors: Kimura Willian , Horita Flávio , Rocha Vladimir
Published: January 2021

Metodologias ágeis têm tido uma relevância muito alta em empresas que trabalham com desenvolvimento de software. Isto por conta de suas características únicas que implicam agilidade nos processos, evitando perdas significativas na qualidade do produto. Neste sentido, este artigo analisa como as ferramentas de transformação digital atuam como meio para a institucionalização de tais metodologias.
Processo de Manutenção Evolutiva de uma Ferramenta de Geração de Código
Authors: Torres Túlio Ribeiro , Viana Matheus Carvalho
Published: January 2021

A ferramenta JMOGEN facilita a construção de frameworks específicos de domínio e a utilização destes no desenvolvimento de sistemas de informação. Contudo, sua versão inicial gerava o código dos frameworks e sistemas sem documentação alguma. Este trabalho teve como objetivo realizar processo de manutenção evolutiva na ferramenta para incluir a funcionalidade de geração de diagramas de classes dos frameworks e sistemas desenvolvidos por meio dela. A partir desses modelos, obtém-se uma visualização da estrutura do código gerado, facilitando o entendimento e a manutenção do mesmo.
Modernização de Arquiteturas de Sistemas para suporte à Transformação Digital
Authors: Leon Pablo Luiz , Horita Flávio
Published: January 2021

Com a massificação no uso da tecnologia, empresas e o governo têm empregado tecnologias para viabilizar a transformação digital dos produtos e serviços demandados pela sociedade. Contudo, a descentralização dos sistemas torna-se importante para criar novas soluções e/ou serviços aos usuários com uma experiência mais conectada e em tempo real. Há dois desafios: 1) como descentralizar os sistemas legados existentes para fornecer uma solução de tecnologia que atenda as novas necessidades dos usuários desta sociedade mais digital; e 2) como criar uma arquitetura de sistemas que contemple as característıcas inerentes na transformação digital. Neste sentido, esta proposta de projeto busca apresentar uma abordagem de modernização de sistemas legados de maneira à convergir os negócios um cenàrio de transformação digital.
Automatic Grading of Portuguese Short Answers Using a Machine Learning Approach
Authors: Galhardi Lucas , De Souza Rodrigo C. Thom , Brancher Jacques
Published: January 2021

Short answers are routinely used in learning environments for students’ assessment. Despite its importance, teachers find the task of assessing discursive answers very time-consuming. Aiming at assisting in this problem, this work explores the Automatic Short Answer Grading (ASAG) field using a machine learning approach. The literature was reviewed and 44 papers using different techniques were analyzed considering many aspects. A Portuguese dataset was build with more than 7000 short answers. Different approaches were experimented and a final model was created with their combination. The model’s effectiveness showed to be satisfactory, with kappa scores indicating moderate/substantial agreement between the model and human grading.
Um Estudo Paramétrico do Algoritmo Evolutivo baseado na representação Interação-Transformação para Regressão Simbólica
Authors: Aldeia Guilherme , França Fabrício
Published: January 2021

Dada uma base de dados com variáveis explanatórias x e uma variável alvo y, onde exista uma função desconhecida f(x) = y, a regressão simbólica busca por uma função f(x) que se aproxime suficientemente bem de f(x). Ela costuma ser feita por meios da programação genética, um método de busca e otimização que simula conceitos da teoria da evolução para construir e ajustar ˆf(x) através da manipulação de populações de soluções, mas a forma em que as soluções são expressas (por meio de árvores sintáticas) apresenta um espaço de busca amplo e resultados pouco interpretáveis. Nesse contexto, foi introduzida recentemente uma nova representação para a regressão simbólica — a Interação-Transformação (IT) — de forma a evitar esses problemas, limitando o espaço de busca em expressões simples, sendo capaz de retornar resultados com maior interpretabilidade que se mantem competitivos com a literatura. Algoritmos de regressão simbólica apresentam um importante compromisso entre aproximação dos dados e complexidade da função encontrada. Essa representação foi usada no contexto de um algoritmo evolutivo, com a finalidade de encontrar expressões concisas que tenham um erro de aproximação pequeno e resultados competitivos com a literatura. Em [Aldeia and de França 2020], os autores investigaram a influência dos hiper-parâmetros do algoritmo evolutivo proposto sobre os resultados, em termos de erro de aproximação e complexidade da função simbólica encontrada. Os resultados mostraram que o número máximo de termos ´ e mais importante que o limite de expoentes permitido, e existe um limite onde aumentar o tamanho da expressão gera benefícios, podendo ser explicado pelo overfit. Como o limite dos expoentes tem menor influência, ele pode ter um valor definido como padrão sem impactar nos resultados, mas diminuindo a complexidade das funções em termos de sua interpretabilidade.
Comparing Oxidative Stress Status Among Iranian Males and Females with Malignant and Non-malignant Thyroid Nodules
Authors: Faam Bita , Ghadiri Ata A , Ghaffari Mohammad Ali , Totonchi Mehdi , Khorsandi Layasadat
Published: January 2021

Background: Oxidative stress is commonly accrued in thyroid tissue during hormone synthesis. Objectives: We aimed to examine oxidative stress in patients with thyroid cancer, benign thyroid nodules, and healthy individuals. Methods: In this study, 138 individuals were involved. Among the selected participants, 108 had thyroid nodules, including 30 papillary thyroid cancer (PTC), 30 follicular thyroid cancer (FTC), six anaplastic thyroid cancer (ATC), 12 medullary thyroid cancer (MTC), and 30 benign nodules. In addition, 30 individuals were selected as a healthy control group. The levels of total antioxidant capacity (TAC) and total oxidant status (TOS) of thyroid tissue were measured using the ELISA method, and the oxidative stress index (OSI) was calculated. Results: The TAC level was significantly lower in MTC and FTC subtypes than in controls. The TOS level was considerably higher in the MTC group than in the control and benign nodule groups. The TOS level was not changed in other groups. The OSI was considerably higher in MTC and FTC subtypes. The TAC and OSI in benign nodules were significantly lower and higher than those of controls, respectively. The OSI was higher in female patients than in males. Conclusions: The OSI can not be considered a diagnostic biomarker for benign nodules and MTC. The diverse oxidative stress status between genders may be related to the elevated cancer incidence in females.
The Sacrality of Things
Authors: Checketts Levi ,   Philosophy Documentation Center
Published: January 2021

Abstract: Mitcham, Borgmann, and others argue the character of technology is at odds with the character of Christian life. This paper challenges that claim in two moves. First, I examine ways Christian theology has been formed by Roman crucifixion, the printing press, and transoceanic navigation; Christology, biblical studies, and missiology are critically dependent upon technologies that facilitated the death of Jesus, the spread of Protestant literature, and the migration of missionaries. Second, I contend that these technologies shed light on a complicated relationship between the realm of the “sacred” and technologies. Technologies can have the character of being sacred or sacramental. As sacred, technologies fall within the purview of religious devotion like relics or icons. As sacramental, they influence the field of theology, through augmentation or restriction. Thus, technologies can be compatible with Christianity and have a positive effect on religion, expanding the fields of theological reflection and religious devotion.
Introduction to Artificial Intelligence and Machine Learning for Pathology
Authors: Harrison James H. , Gilbertson John R. , Hanna Matthew G. , Olson Niels H. , Seheult Jansen N. , Sorace James M. , Stram Michelle N.
Published: January 2021

Context.—

Recent developments in machine learning have stimulated intense interest in software that may augment or replace human experts. Machine learning may impact pathology practice by offering new capabilities in analysis, interpretation, and outcomes prediction using images and other data. The principles of operation and management of machine learning systems are unfamiliar to pathologists, who anticipate a need for additional education to be effective as expert users and managers of the new tools.

Objective.—

To provide a background on machine learning for practicing pathologists, including an overview of algorithms, model development, and performance evaluation; to examine the current status of machine learning in pathology and consider possible roles and requirements for pathologists in local deployment and management of machine learning systems; and to highlight existing challenges and gaps in deployment methodology and regulation.

Data Sources.—

Sources include the biomedical and engineering literature, white papers from professional organizations, government reports, electronic resources, and authors' experience in machine learning. References were chosen when possible for accessibility to practicing pathologists without specialized training in mathematics, statistics, or software development.

Conclusions.—

Machine learning offers an array of techniques that in recent published results show substantial promise. Data suggest that human experts working with machine learning tools outperform humans or machines separately, but the optimal form for this combination in pathology has not been established. Significant questions related to the generalizability of machine learning systems, local site verification, and performance monitoring remain to be resolved before a consensus on best practices and a regulatory environment can be established.
The influence of cultural and historical heritage on the attractiveness of a tourist destination
Authors: Dašić Dejan , Savić Marko
Published: January 2021

The subject of this paper is the influence of cultural heritage on the attractiveness of a tourist destination. Countries, as bearers of the brand, have become aware that it is no longer enough to invest only in the development of individual tourist destinations, such as those related to maritime tourism, metropolises, ski resorts or spas. T o modern tourists, the whole country must be presented as a tourist destination, and cultural-historical tourism is imposed as the best option. This was influenced by the fact that with the development of society, there have been major changes in the habits, desires, but also the needs of tourists, who today want different types of vacation. The aim of this paper is to present the marketing potentials of the cultural and historical heritage of Serbia.
Analysis of panel design experiments in advanced longwall mines
Authors: Hoseinie Seyed , Ghodrati Behzad
Published: January 2021

Panel design and its geometry affects the productivity, strata control and operational costs of longwall mining. Selection the suitable panel size is a critical stage which needs a wide range of geological, technological and economical inputs. Seam height and overburden are two uncontrollable factors which play an important role in longwall mine design. Panel width, panel length and layout of whole mine are main design parameters which are selected based on uncontrollable factors and technological restrictions. In this paper the geometrical characteristics of 61 longwall panels in 46 operating mines of USA have been applied for statistical analysis and extracting some experimental design benchmarks. The analysis shows that average seam height, panel overburden, panel width and panel length are 2.26, 200, 361.5 and 3455 respectively. Average panel width to depth ratio is 1.53 and panel length to width ratio is 9.55. The 3D data analysis reveals that overburden is more important than seam height in enlargement of longwall panels and maximum of the panel area (panel length multiplied by panel width) occurs when the overburden is between 150 to 250 meters and seam height is from 1.5 to 2.5 meters. Also, 50 percent of the studied advanced longwall panels the width to depth ratio varies from one to two. It confirms that even in shallow panels the designers have selected larger panel dimensions to enhance the productivity by considering some subsidence problems and high caving pressures.
Perception of emotions as a predictor of social functioning and the quality of life in patients with schizophrenia
Authors: Ristić Branko , Batinić Borjanka
Published: January 2021

Introduction: Perception of emotions is an important aspect of social functioning and the quality of life, and its deficit has been consistently found in people with schizophrenia. Aim: To obtain better understanding of the relationship and predictability between the perception of emotions, social functioning and the quality of life in people with schizophrenia. Method: The sample comprised 64 respondents (the clinical and the control group consisting of 32 subjects each, equal in terms of gender, age and education). Perception of emotions was measured using the test of speed and accuracy of perception of facial expression, while social functioning and the quality of life were measured via self-assessment questionnaires. The research was exploratory and non-experimental correlational. Results: In both the clinical and control groups, the perception of emotions is positively correlated with social functioning and the quality of life. Still, the direction of predictivity remains unclear due to the complexity of relationships. Compared to the control group, there was a deficit in the domains of perception of emotional expression, social functioning and the quality of life in the clinical group. The deficit in the perception of emotions in patients with schizophrenia is global and affects all emotions, while it is most pronounced when it comes to the emotions of surprise and anger. Conclusions: The obtained findings indicate that the understanding of the lack of functioning in people with schizophrenia should be sought, among other things, in the relation between the perception of emotions, social functioning and the quality of life in order to gain a better insight into choosing the proper line of treatment with the aim of improving the overall well-being of the patients.
Description of the process of tunneling Q signaling in private telecommunication networks
Authors: Svrzić Slađan , Miličević Zoran , Perišić Zoran
Published: January 2021

Introduction/purpose: The article should specify the network signaling type Q-SIG, which is standardized especially for implementation in digital telecommunication networks of integrated services (ISDN), emphasizing the possibility of its further application in the Private Telecommunications Network of Integrated Services of the Serbian Armed Forces (PISN of SAF), i.e. in the Private Automatic Telephone Network of the Serbian Armed Forces (PATN of SAF). Methods: An analysis of the existing standards was performed: ECMA355 and ECMA-336 and a synthesis of the possibilities of their application in the PATN of SAF. Results: The procedure for the application of Q-SIG is processed in a situation when the peripheral parts of the PISN of SAF, which operate on the principle of transmission and circuit switching by TDM (Time Division Multiplexing), are connected via a central Core network with the IP (Internet Protocol), which operates on the principle of packet transmission and switching with the SIP (Session Initiation Protocol). A method of the application of the tunneling of encapsulated Q-SIG messages through the IP network, defined by ECMA-355 Standard, has been developed. The necessary functions for mapping the transmission of tunneled signaling messages Q-SIG and mapping voice (and other audio) information to media streams during VoIP (Voice over IP) communication through that network, which are defined by ECMA-336 Standard, are described. Conclusion: The application of ECMA-355 and ECMA-336 Standards is a new solution in the PATN of SAF with the use of the IP network to connect the IP PINX using the Q-SIG tunneling procedures and mapping functions for their transmission and transmission of audio signals. This then opens up a whole range of new possibilities that, with the growth of the Core network and their application, will rapidly contribute to the creation of a broad Telecommunication information system backbone for the implementation of real-time multimedia communications and the transition to Unified Communications (UC).
A. Y. Jackson, régionaliste québécois?
Authors: Gagnon François-Marc
Published: January 2021

When visiting Québec, A. Y. Jackson was tempted by motifs which are traditionally attributed to the Québec regionalist school. The fact that he drew, on the suggestion of Clarence A. Gagnon, the illustrations of Adjutor Rivard's Chez Nous, a regionalist publication if there ever was one, demands explanation. The author’s thesis is that both the Québec regionalists (Clarence A. Gagnon above all) and A. Y. Jackson concurred in a touristic view of Québec. Their common enthusiasm for the Charlevoix region, to which Jackson succeeded in attracting Arthur Lismer, could be compared to Gauguin’s enthusiasm for Pont Aven. Both shared what D. MacCannell has called a “modernistic fascination for the premodern” and should be seen in the same “modernistic” perspective. Even the “direct” style adopted by Jackson seemed to substantiate this rapprochement.
The San Venanzio Chapel in Rome and the Martyr Shrine Sequence
Authors: Mackie Gillian
Published: January 2021

Les lieux de vénération reliés au culte des martyrs forment des séquences spécifiques à considérer dans le temps et dans l’espace. On se rendra compte qu’elles incluent, en partie ou en totalité, les éléments suivants : un lieu de martyre, un tombeau, une cella memoriae, des chapelles avec chambres funéraires ad sanctos, un sanctuaire collectif du martyre ou martyrium. Une telle combinaison se retrouve chez un groupe de martyrs de Dalmatie et d’Istrie, dont les reliques furent rapportées à Rome par le pape, Jean IV (640-642) et vénérées dans les chapelles latérales ouvrant sur le Baptistère du Latran. C’est à Salone, la capitale de la Dalmatie romaine, que l’on peut voir la plus grande partie des sites et des édifices, mais dont le point culminant de l’ensemble demeure la chapelle de San Venanzio à Rome. Ce martyrium du Latran, sa décoration de mosaïques, et les découvertes archéologiques sans parallèle du site paléo-chrétien de Salone, constituent, lorsque réunis, une source majeure de renseignements non seulement sur un groupe de martyrs et un ensemble d’édifices commémoratifs, mais aussi sur l’évolution historique du culte des martyrs.
The Stag’s Skull and the Iconography of Titian’s Diana and Actaeon
Authors: Tresidder Warren
Published: January 2021

Les études iconographiques du tableau du Titien Diane et Actéon publiées au cour de ces trente dernières années suivent l’interprétation de Ellis Waterhouse selon laquelle le crâne de cerf placé sur un pilier à la droite de la composition annonce la métamorphose d’Actéon et sa mise à mort par ses propres chiens. Selon ces analyses le tableau est ainsi centré sur le destin d’Actéon puni par Diane.

L’auteur remarque cependant que des modifications de la couche picturale ont conduit les observateurs à considérer la crâne de cerf comme un motif isolé. Celui-ci ne serait en réalité qu’un simple trophée de chasse de Diane. Titien aurait plutôt choisi de représenter la confrontation initiale entre le chasseur et la déesse. En effet, une telle interprétation de l’épisode mythologique coïncide parfaitement avec les traductions italiennes de Diodore Siculus contemporaines du peintre vénitien.
Francesco Trevisani’s Design for the Frontispiece to the Theses iuris publicae disputationi of Antonio Zondadari (1689)
Authors: Abouzia Roya
Published: January 2021

La gravure qui sert de frontispice à un livre de science juridique dédié au cardinal Flavio Chigi ii présente un certain nombre de références symboliques à cet important personnage. Les éléments architecturaux évoquent le Temple de la Sagesse et les portraits dans les médaillons mettent en évidence les liens qui unissent Chigi à la papauté et aux traditions intellectuelles de son ancêtre le plus prestigieux.
De la Delie de Scève en Diotima rediuiua, ou l’image d’un mentor sans le son
Authors: Bonnier Xavier
Published: January 2021

Mentor exceptionnel car femme, étrangère, et instruisant Socrate, Diotime constitue à la Renaissance une référence majeure pour réfléchir sur l’amour en rejouant le Banquet. Mais tout se complique lorsque Scève, après Castiglione et Speroni, campe Diotime en métaphore de l’Aimée dans Delie (1544) : la concurrence d’autres instances féminines, le caractère final de l’assimilation, l’ambiguïté structurelle du dizain, et le caractère silencieux d’un discours prétendument rédempteur, laissent apparaître une dimension ironique, car Diotime enseigne aussi bien à haïr qu’à aimer, et la spécificité retorse d’un discours qui préfère l’inscription à l’expression.
L’échec du mentorat dans Les malheurs de l’amour (1747) de Madame de Tencin et dans Les Lettres du marquis de Roselle (1764) de Madame Élie de Beaumont
Authors: Viselli Sante Arcangelo
Published: January 2021

Le roman du siècle des Lumières est riche en topoi mettant en scène le mentor : Madame de Tencin dans Les Malheurs de l’amour (1747) et Madame Élie de Beaumont dans les Lettres du marquis de Roselle (1764) sont particulièrement sensibles à la mise en scène de ce personnage qui évolue depuis Fénelon de manière dramatique. Dans les textes étudiés, ce conseiller avisé, souvent une femme, évoque une philosophie qui dépasse son symbolisme classique : souvent maître à penser, il devient lui-même un porte-parole désabusé des Lumières, mais il en sera lui-même/elle-même victime. Il/elle guide le mentoré/la mentorée à travers la forêt obscure des illusions passionnelles, celles de l’amour certes, mais celles engendrées surtout par le jeu quelque peu contradictoire des intérêts de classe, de la morale bourgeoise en mal de devenir et d’une aristocratie appauvrie, décadente et libertine.

Le XVIIIe siècle voit une véritable métamorphose du mentor classique : il continue de remplir le rôle pluriel de conseiller, mais aussi de modèle d’ordre narratologique surtout chez Madame de Tencin –la référence obligée demeurant Madame de Lafayette. Davantage, le mentor devient au siècle des Lumières un être en chair et en os, sensuel et passionné et dont la morale atteint plutôt une dimension anthropologique, qui ausculte les lois et les sonde à la lumière de la raison. Le siècle des « libertins » est le siècle d’un mentorat repensé, calculé, teinté souvent de ce mal existentiel, résurgence des forces du « moi » double qui caractérise l’être, une philosophie inaugurée par Montaigne et qui trouvera ses échos chez Descartes ou Pascal entre autres. Ce mal persiste au siècle de la « raison » malgré l’optimisme qui semble le caractériser. Nous limitons notre analyse aux deux romans mentionnés dans l’intitulé, mais il serait souhaitable, dans des études ultérieures et pour enrichir la base des données de la SATOR, d’élargir le débat à d’autres romans des Lumières.
Le mentor et l’homme, l’exemple du Doyen de Killerine de l’abbé Prévost et du Nouveau doyen de Killerine de L-S. Mercier
Authors: Cheng Alisson Charlène
Published: January 2021

Si l’oeuvre de Prévost est marquée par le thème de l’éducation, seul Le Doyen de Killerine (1735-1740) structure l’intégralité du récit autour des aventures d’un guide moral dont l’inexpérience remettra constamment en question sa mission. Du reste, cette spécificité semble d’autant plus remarquable qu’elle inspirera quelques années plus tard L-S. Mercier dans son drame intitulé Le Nouveau Doyen de Killerine. La présente étude se propose d’étudier comment ces œuvres mettent en exergue le discours de mentors équivoques, aux prises avec leurs faiblesses d’homme, à travers l’étude de deux topoï, à savoir celui du changement d’identité et de la reconnaissance.
« Connais-toi toi-même et tu connaîtras l'univers et les dieux », l’initiation dans Archaos ou le jardin étincelant de C. Rochefort
Authors: Amiri Imen
Published: January 2021

Archaos ou le jardin étincelant de Cristiane Rochefort, est une utopie post soixante-huitarde.  L’apprentissage prôné dans ce roman, fait un pied de nez aux romans d’initiation traditionnels : les règles édictées ne le sont pas par un mentor exogène. Les maîtres à pensée classiques sont tournés en dérision. L’initiation tournée vers et pour soi-même, se fait par le biais de l’éducation sexuelle condition sine qua non de l’accession au pouvoir. Résolument féministe, ce roman repense le monde guidé par les femmes. Archaos est l’histoire d’un cheminement dionysiaque, qui sous couvert d’utopie politique, appelle à la mort symbolique et à une renaissance ésotérique sous l’égide de la déesse Isthar.
Determinants of Companies’ Financial Performance Following M&A Transactions in Poland
Authors:   Kozminski University, Ocieszak Marcin
Published: January 2021

Purpose: This study identifies and analyzes the factors that impact the financial performance of companies after a merger and acquisition transaction. Methodology: As many as 130 Polish market observations were analyzed with an OLS regression model to verify the research hypotheses. Results: The results reveal that the company’s size, performance before the transaction, and its international nature translated into improvement of post-transaction financial performance. Moreover, industry diversification transactions and CEO changes in acquiring a company had a negative impact on the company’s financial performance after the transaction. Originality: This investigation is the first study devoted to the Polish market in the research field of M&A determinants with the use of such a large sample.
ADID-UNET—a segmentation model for COVID-19 infection from lung CT scans
Authors: Joseph Raj Alex Noel , Zhu Haipeng , Khan Asiya , Zhuang Zhemin , Yang Zengbiao , Mahesh Vijayalakshmi G. V. , Karthik Ganesan
Published: January 2021

Currently, the new coronavirus disease (COVID-19) is one of the biggest health crises threatening the world. Automatic detection from computed tomography (CT) scans is a classic method to detect lung infection, but it faces problems such as high variations in intensity, indistinct edges near lung infected region and noise due to data acquisition process. Therefore, this article proposes a new COVID-19 pulmonary infection segmentation depth network referred as the Attention Gate-Dense Network- Improved Dilation Convolution-UNET (ADID-UNET). The dense network replaces convolution and maximum pooling function to enhance feature propagation and solves gradient disappearance problem. An improved dilation convolution is used to increase the receptive field of the encoder output to further obtain more edge features from the small infected regions. The integration of attention gate into the model suppresses the background and improves prediction accuracy. The experimental results show that the ADID-UNET model can accurately segment COVID-19 lung infected areas, with performance measures greater than 80% for metrics like Accuracy, Specificity and Dice Coefficient (DC). Further when compared to other state-of-the-art architectures, the proposed model showed excellent segmentation effects with a high DC and F1 score of 0.8031 and 0.82 respectively.
ГРАМОТЫ АННЫ ЯРОСЛАВНЫ, КОРОЛЕВЫ ФРАНЦИИ (1051/55–1075) , "Средние века"
Authors: Шишкин В.В.
Published: January 2021

Статья сопровождается кратким описанием 28 актов и грамот, составленных от имени или при участии французской королевы XI в. Анны Ярославны, дочери великого князя Киевского Ярослава I Владимировича, жены Генриха I из династии Капетингов. Принимаются во внимание все предыдущие попытки изучения, систематизации и публикации сохранившихся документов, начиная с XVII в. Приводятся свидетельские подписи лиц, фигурирующих в грамотах, большую часть имен которых удалось идентифицировать. Публикуемые описания позволяют уточнить отдельные аспекты биографии Анны Ярославны, определить границы ее политического влияния на государственные дела.
СЦЕНЫ ДЛЯ КОРОЛЯ, ИЛИ ИСТОРИЯ ПОДМОСТКОВ ПОЛИТИЧЕСКОГО ТЕАТРА ЛЮДОВИКА XIV, "Средние века"
Authors: Сидоренко М.А.
Published: January 2021

В центре исследования одна из составляющих придворного балета, сложного и многогранного явления культурной и политической жизни Франции Старого порядка – сцена, или, если быть более точным, сцены, на которых около века монархи Франции в окружении принцев и придворных танцевали перед своими подданными. Чем руководствовались правители, выбирая помещение для постановки очередного придворного балета Какую роль в истории королевства сыграли театральные залы Парижа и королевских резиденций Как они помогали правителям эпохи барокко в управлении государством При ответе на эти вопросы автор обратился к письменным источникам – воспоминаниям, литературным произведениям и периодике Великого века. Другую группу источников составили гравюры и карандашные рисунки, на которых изображены церемонии, балетные представления и интерьеры залов.
А.Х. ГОРФУНКЕЛЬ – ВЫДАЮЩИЙСЯ ИССЛЕДОВАТЕЛЬ ЭПОХИ ВОЗРОЖДЕНИЯ И ОТЕЧЕСТВЕННОЙ ИСТОРИИ , "Средние века"
Authors: НИКОЛАЕВ Н.И.
Published: January 2021

Статья посвящена памяти историка западноевропейской и русской культуры А.Х. Горфункеля (11.07.1928–26.04.2020). В статье представлены основные темы исследований А.Х. Горфункеля, посвященные истории философской мысли в Италии XV–XVII вв., истории западноевропейского и русского книгопечатания XV–XX вв., русской аграрной истории XVI–XVII вв., архивному делу XVIII–XX вв. Особое внимание уделено ученым мемуарам А.Х. Горфункеля – «Моя школа, мои университеты...: Воспоминания» (СПб., 2017). В статье подчеркивается исключительный вклад А.Х. Горфункеля в области своих исследований.
Assessment of Preoperative Clinicophysiologic Findings as Risk Factors for Postoperative Pancreatic Fistula After Pancreaticoduodenectomy
Authors: Suzuki Shuji , Shimoda Mitsugi , Shimazaki Jiro , Oshiro Yukio , Nishida Kiyotaka , Orimoto N. , Shiihara Masahiro , Izumo Wataru , Yamamoto Masakazu
Published: January 2021

Objective

Postoperative pancreatic fistula (POPF) is one of the severe complications that develop after pancreaticoduodenectomy (PD). This study aimed to assess the utility of preoperative clinicophysiologic findings as risk factors for POPF after PD.

Summary of Background Data

We enrolled 350 patients who underwent PD between 2007 and 2012 at Tokyo Women's Medical University.

Methods

In total, 350 patients who underwent PD between 2007 and 2012 were examined retrospectively. All patients were classified into 2 groups as follows: group A (no fistula/biochemical leak group, 289 patients) and group B (grade B/C of POPF group 61 patients). Variables, including operative characteristics, length of stay in hospital, morbidity, mortality, and data regarding preoperative clinicophysiologic parameters, were collected and analyzed as predictors of POPF for univariate and multivariate analyses.

Results

There were 213 male and 137 female patients. The mean age was 65.4 years (range, 21–87 years). Univariate analysis showed that sex (P = 0.047), amylase level (P = 0.032), prognostic nutritional index (PNI; P = 0.001), and C-reactive protein/albumin ratio (P = 0.005) were independent risk factors for POPF. In contrast, multivariate analysis showed that sex (P = 0.045) and PNI (P = 0.012) were independent risk factors for POPF.

Conclusions

Our results show that PNI (≤48.64 U/mL) and male sex were risk factors for POPF after PD, and especially, PNI can be suggested as an effective biomarker for POPF.
Liver Transection with Precoagulation Therapy in Liver Cirrhosis: Effective Use of an Energy Device at Hepatectomy
Authors: Kusano Tomokazu , Aoki Takeshi , Koizumi Tomotake , Matsuda Kazuhiro , Yamada Kosuke , Nogaki Koji , Tashiro Yoshihiko , Wada Yusuke , Hakozaki Tomoki , Shibata Hideki , Tomioka Kodai , Hirai Takahito , Yamazaki Tatsuya , Saito Kazuhiko , Mitamura Keitaro , Fujimori Akira , Koike Reiko , Enami Yuta , Murakami Masahiko
Published: January 2021

Background

Hepatectomy for liver cirrhosis patients requires skillful surgical technique and careful attention because of the fibrotic parenchyma, elevated portal pressure, and impaired coagulation. This report evaluated short- and long-term outcomes for liver cirrhosis patients receiving precoagulation therapy on the parenchymal transection plane, compared with noncoagulation cases.

Methods

Seventy-three patients diagnosed with cirrhosis via postoperative pathological findings were selected after reviewing 887 hepatectomy patient files. They were divided into a precoagulation group (n = 20) and a noncoagulation group (n = 53). There were no significant differences in patient and tumor factors between 2 groups.

Results

The precoagulation group had significantly less blood loss compared with noncoagulation group [282 vs 563g (P < 0.05)], shorter operative time [214 vs 276 min (P = 0.06)], and shorter postoperative hospital stays [14.5 vs 22.5 days (P = 0.12)]. The median recurrence free survival rates time in the pre-coagulation group (733 days) was significantly longer than that in the non-coagulation group (400 days) (P < 0.05). Overall survival rates showed rates showed no difference between the 2 groups (P = 0.62).

Conclusions

Precoagulation therapy may be the a preferred treatment application for hepatectomy patients with severe liver fibrosis.
Subunits of the GPI transamidase complex localize to the endoplasmic reticulum and nuclear envelope in Drosophila
Authors: Kawaguchi Kohei , Yamamoto‐Hino Miki , Matsuyama Nina , Suzuki Emiko , Goto Satoshi
Published: January 2021

A total of 10–20% of plasma membrane proteins are anchored by glycosylphosphatidylinositol (GPI). GPI is attached to proteins by GPI transamidase (GPI‐T), which contains five subunits named PIGK, PIGS, PIGT, PIGU, and GPAA1. We previously reported that PIGT localizes near the nucleus in Drosophila. However, localizations of the other four subunits remain unknown. Here, we show that a catalytic subunit of GPI‐T, PIGK, mainly localizes to the endoplasmic reticulum (ER), while the other four subunits localize to the nuclear envelope (NE) and ER. The NE/ER localization ratio of PIGS differs between cell types and developmental stages. Our results suggest that GPI‐T catalyzes GPI attachment in the ER and the other four subunits may have other unknown functions in the NE.
Low‐Density Parity‐Check (
LDPC
) Codes for
5G
Communications
Authors: Olmos Pablo M. , Liu Yanfang , Mitchell David G. M.
Published: January 2021

In this article, we describe the fundamental advances in low‐density parity‐check (LDPC) codes over the last two decades with special emphasis on the class of LDPC codes selected for the 5G new radio standard. We present structured protograph and quasi‐cyclic LDPC codes, which are convenient for hardware implementation. The 5G LDPC codes are then reviewed in detail. Hardware considerations regarding the implementation of the encoders and decoders of 5G LDPC codes are also discussed. We conclude the article by presenting three of the more promising extensions of LDPC codes known to date (generalized LDPC codes, nonbinary LDPC codes, and spatially coupled LDPC codes), which could potentially replace conventional LDPC codes in future communication standards.
Full‐DuplexRFDesigns
Authors: Zhou Jin
Published: January 2021

Full‐duplex wireless involves simultaneous transmission and reception at the same frequency, promising significant enhancement in wireless network performance, such as spectral efficiency, link capacity, and network latency. For full‐duplex radios, >100 dB self‐interference suppression is needed and must be performed across the antenna, radio frequency (RF), analog, and digital domains. Self‐interference cancellation (SIC) in the RF domain, where a replica signal is tapped from the transmitter output and injected prior to receiver down‐conversion, has been used in many full‐duplex wireless systems. In this article, we describe different SIC architectures and unveil the challenges associated with full‐duplex RF SIC design. Discussion and review of some full‐duplex RF SIC designs are presented followed by a brief outlook for future works.
5G Mobile Networks Security Landscape and Major Risks
Authors: Mitra Rupendra Nath , Marina Mahesh K.
Published: January 2021

The 5G is all set to create a paradigm shift in the telecommunication network architecture by introducing a millimeter‐wave‐based customizable radio network and a redesigned cloud‐native core network to offer high‐speed, low‐latency mobile broadband anytime anywhere. The key enabling technologies of the 5G are massive MIMO, beamforming, Software‐Defined Networking (SDN), Network Functions Virtualization (NFV), and Mobile Edge Computing (MEC). However, the network agility, connection to billions of smart things, and blind adoption of machine learning models and open‐source software in the networked systems bring in a unique set of security threats and privacy concerns to the network and its stakeholders. This article provides a comprehensive analysis of the evolving security threat landscape of 5G, recommended security measures, current state‐of‐the‐art solutions, and open research areas.
5GC
Service‐Based Interfaces and Protocols
Authors: Fenqin Zhu
Published: January 2021

The service‐based interface is used for the message interaction among the 5GC NFs. It is clarified what is the NF service, NF service operation, system procedure, and the relation among them. How to define the NF service in a suitable granularity is discussed. The protocol of the service‐based interface (SBI) is explained.

For the interaction between the NF service consumer and NF service producer, it can be either request/response semantics service operation or subscribe/notify semantics service operation. The general behavior of these two types of service operation is described. Service Framework is the basic functionality supported by each by each 5GC NF. It includes service registration/discovery/authorization. Service status subscription is another import functionality even it is not belonged to the service framework. How to structure the NRF in the network is another important issue when considering the big network. To support the priority service, e.g. emergency service, Message priority header is introduced. It does have some impact on the NF service consumer, proxy, NF service producer.

Load/Overload control can keep the network in the stable state. This requires some design considerations at the SBI interface. Security includes the service access authorization, the transferring of the signaling communication.

It is always possible that a NF/NF service instance is failure and restart. To minimize the service interruption, it should be possible to detect this failure and restart of the NF instance or NF service instance. After that failure and restart detection, the NF service instance or NF instance can be reselected.
5G
Orchestration and Management
Authors: Gautam Deepanshu
Published: January 2021

5G ushers in great opportunity and enables a wide spectrum of services to become available, more efficiently and effectively than ever before. Operational management of the 5G network is crucial in order to fully achieve all that is intended. Management and orchestration are two crucial focus areas of the overall 5G network management framework. Management deals with overseeing and controlling 5G network functions and services from the perspective of their expected functionality and performance. Whereas orchestration deals with realizing and adapting 5G network functions and services from the virtualization perspective. ETSI ISG NFV defines the 5G orchestration framework, while 3GPP defines the orchestrated components and data model, as well as all 5G management.

NFV plays a vital role in 5G network management and orchestration. It has been considered one of the building blocks of the 5G network. NFV enables the virtualization of multiple functions and resources in the network. Specifically, NFV enables 5G network slicing, allowing various virtual networks to run on top of a single, physical infrastructure.

Management and orchestration of 5G networks and network slicing are features that include the following work aspects in 3GPP standards: the management concept and architecture, provisioning, network resource model, fault supervision, assurance and performance management, trace management, and virtualization management aspects. With this focus, the 3GPP SA Working Group 5 (SA5) specifies management interfaces in support of 5G networks and network slicing. An operator can configure and manage the mobile network to support various types of services enabled by 5G, for example eMBB (enhanced Mobile Broadband) and URLLC (Ultra‐Reliable and Low Latency Communications), depending on the different customers' needs.
Investigating the Electrochemical Performance of Smart Self‐Powered Bionic Skin Fragment Based on Bioelectricity Generation
Authors: Dai Hanqing , Chen Yuanyuan , Dai Wenqing , Hu Zhe , Xie Fengxian , Xu Wenqian , Cui Zhongjie , Wei Xian , Chen Zhihao , Yang Bobo , Zhang Wanlu , Wei Wei , Guo Ruiqian , Zhang Guoqi
Published: January 2021

Human skin, with beneficial elasticity and reparability, could sense the changes of the external environment through different receptors. Imitating these mechanical properties and perception of bionic skin with power supply function is an enormous challenge in the field of Internet of things and artificial intelligence. Herein, the neural signal transmission of human skin is imitated to create a smart self‐powered bionic skin fragment integrating skin and power supply functions. Unlike the traditional bionic skin in essence, it can intelligently perceive the outside world by using anion‐selective and cation‐selective gels to control exchangeable anions and cations to realize the change of resting current and action current, and it can maintain the relatively stable self‐powered current of 0.5 µA for nearly 2.2 h. Moreover, its mechanisms of current and voltage changes are systematically investigated. These results reveal that it can be applied to the synchronous transmission of signals for the next‐generation neurologically integrated soft engineering systems such as bionic sensors, or prosthetic devices in hybrids of living and nonliving systems.
Tensor Holographic Metasurface Using Addition Theory to Independently Manipulate Orthogonally Polarized Bessel Beams
Authors: Shen Yizhu , Xue Song , Yang Jiawei , Hu Sanming
Published: January 2021

A tensor holographic metasurface is proposed, to independently manipulate nondiffractive beams with orthogonal polarization and flexible propagation direction. To theoretically analyze the proposed topology, addition theory is developed to modulate surface impedance using tensor cells. Moreover, a polynomial formula is derived to express the equivalent surface impedance of tensor unit cells for pattern generation. To validate this concept, a tensor holographic metasurface is designed, fabricated, and measured. The well‐matched simulation and measurement results show that, for the first time, the proposed holographic metasurface with tensor unit‐cells, simultaneously generates two Bessel beams, not only with orthogonal polarization, but also with expected propagation direction rather than fixed along the broadside. Moreover, the proposed topology is promising to manipulate multiple beams not limited to two Bessel beams.
Spectroscopic models for real‐time monitoring of cell culture processes using spatiotemporal just‐in‐time Gaussian processes
Authors: Tulsyan Aditya , Khodabandehlou Hamid , Wang Tony , Schorner Gregg , Coufal Myra , Undey Cenk
Published: January 2021

Spectroscopic methods play an instrumental role in the implementation of the U.S. Food and Drug Administration outlined process analytical technology for biopharmaceutical manufacturing. Industrial spectroscopic calibration models are typically developed in an offline setting using traditional methods, such as partial least squares and principal component regression. Apart from the limiting performances of these conventional models under time‐varying operating conditions, these methods require access to extensive historical data, which are seldom available in biopharmaceutical manufacturing. In this article, we propose a novel spatiotemporal just‐in‐time learning (ST‐JITL) based spectroscopic model calibration platform for automatic training and maintenance of calibration models using routine batch data. The proposed ST‐JITL framework uses Gaussian processes (GPs) for local model calibration. A GP model not only exhibits superior performance over traditional methods but also provides credibility intervals around the model predictions. The efficacy of the ST‐JITL based model calibration platform is demonstrated in predicting the critical performance parameters of an industrial cell culture process.