bluuebunny/crossref_metadata_2025 huggingface dataset:
A summary of algorithm research on hybrid flow-shop scheduling problem
Authors: Chen Zhaolin
Published: August 2023

The hybrid flow shop scheduling problem is a flow shop scheduling problem that combines the two scheduling characteristics of the classical flow shop and the parallel machine. It is also one of the research hotspots in the field of shop scheduling. In this paper, the algorithm for solving the problem is reviewed, and the research status of the related expansion problems of the mixed flow workshop is summarized. Finally, combined with the development trend, the existing problems in the current research are analyzed, possible solutions are proposed, and the application of the algorithm for solving the problem of mixed flow shop scheduling in new fields in the future is discussed.
Finite element analysis on heat convection effect on air temperature distribution in a heated room
Authors: Chen Zhekai
Published: August 2023

Using the finite element method to solve heat transfer problem in solid medium has been popular since last century, but heat convection effect in fluid medium makes the problem cumbersome to solve efficiently. Thermal transfer calculation of fluid medium is complicated, because solving heat convection and Navier-Stokes equation is hard. By making proper assumptions, intricate equations can be skipped, and it is possible to give rough estimate of heat transfer result through a simple and efficient calculation. Which is significant for design and verifiction of heating system for physicists and engineers. The study aims to solve the temperature distribution of a certain heat system, using finite elment method and with given assumpted air circumfluence. In the calculation, the room domain is subdivided into finite elments, and the boundary condition is given according to the heat influx and emmision, air circumfluence is introduced to simulate the effect of convection. The simplified model illustrated that the finite element method is effective in giving quantitative result of heat transfer calculation. It also qualitatively showcased the significance of heat convection, when the result is compared to calculation without any air flow.
Analysis of the characteristics of rocket propellant
Authors: Ma Jiaju
Published: August 2023

Rocket propellant is an important part of the rocket. Solid or liquid propellant will burn in the engine combustion chamber, and then a large amount of high-pressure gas will be generated. High-pressure gas will be ejected from the engine nozzle at a high speed, generating a reaction force on the rocket, so that the rocket will advance in the opposite direction of the gas injection. This paper mainly analyzes the advantages and disadvantages of current propellants and conceives a theoretically feasible propellant selection method. The main method of research is to calculate the theory of each propellant and make diagrams. Some of the research data were based on existing research reports. Each fuel has its own characteristics, they have one aspect of excellent ability, such as heat conduction, high thrust, high reliability. This paper summarizes the characteristics of current propellants and provides a more convenient query for future researches.
Study on SABRE and rocket-based combined cycle engine
Authors: Wen Mingzhao
Published: August 2023

Since the 20th century, countries have been conducting researches on near-spacecraft and have proposed a series of representative space vehicle concepts. This paper reviews the brief history of the development of reusable near-spacecraft and focuses on two combined cycle propulsion modes, SABRE and RBCC, with the goal of improving the performance of future near-spacecraft propulsion systems. An improving idea of combining the RBCC with the SABRE is proposed, and its possibility is discussed by analyzing the specific impulse curve. Two combining configurations of them and design principles are obtained by citing the literature and studying similar configurations. The two designs are also compared and the more optimized one is suggested, so as to offer some inspiration for future studies.
Comparative study on the performance of traditional engines and hybrid engines
Authors: Sun Yijia
Published: August 2023

Engines are very important for human-beings and it is necessary for people to find a perfect kind of engines since they are used in many vehicles. In this paper, it will mainly focus the traditional engines and the hybrid engines, and compare there main performances including economical performance and environmental performance. For economical performance, researches have found that hybrid engine has higher thermal efficiency and lower thermal efficiency loss compared with traditional engine because hybrid engine does not have the inherent defect of crankshaft linkage mechanism as traditional engine. Also, since hybrid engine is consist of both electric motor and internal combustion engine, consequently it will have lower fuel cost. For environmental performance, hybrid engine not only reduce the consumption of non-renewable fuel but also more environmental since using electric to give vehicles power is relative environmental than using fuels only like traditional engine. This paper also find that both traditional engine and hybrid engine have development prospects in the transportation industry.
Analysis and comparison of two classical greedy algorithms for minimum spanning tree
Authors: Yu Xinyi
Published: August 2023

The total weight of the minimum spanning is the smallest in the connected graph. It can be used to solve many practical problems in urban life. Prims algorithm and Kruskals algorithm are greedy algorithms for solving the minimum spanning tree problem. But they make greedy choices in different ways. The paper focuses on two greedy algorithms for solving the minimum spanning tree problem. The author will evaluate each algorithms complexity and determine their most suitable condition as well. The author compares the running process of the two algorithms and analyzes the relationship between their algorithm complexity and the number of edges, which can describe the sparsity of the graphs. The result shows that Kruskals complexity is related to the number of edges, so it is better for sparse graphs. Prims complexity is related to the number of vertices, so it is better at analyzing connected graphs with lots of vertices, that is, dense graphs. As a consequence, Prims algorithm is better for dense graphs.
Analysis on Gliese 486 b
Authors: Zhou Zhihui , Li Jiatong , Zhong Yutong , Hou Zhongqian , Yao Ruixi
Published: August 2023

Gliese 486 b, also known as GJ 486 b, is an exoplanet orbiting around a red dwarf near our solar system. The celestial body is fair target for TESS to observe and related data of it have been collected by TESS. This paper firstly focuses on methods used to obtain planetary parameters and the theoretical base behind them. Then, it turns to some further calculation with our best-fit data, and analogy to the methods that previous researches used. Finally, the paper introduces analysis on the changing period and the relevant potential causes. The paper concludes with some discussion on directions of future investigations.
The influence of different friction methods on curling
Authors: Wang Minxin
Published: August 2023

With the Beijing Winter Olympics, curling has become one of the big hits. To research, professional curlers will brush ice at 40 - 60 , because the curling brush is a universal head when the force and the direction are fixed, changing the curling deceleration movement. This work aims to use Solidworks modeling, Unity virtual simulation, mathematical regression statistical prediction, and MATLAB data visualization to find the most suitable gimbal pole angle under the integration of the sports and physics, to make curling adjustable and provide a reference for improving its competitive level. The conclusion represents the gimbal pole angle is 54.7, and the angular acceleration is 17rad/s, which slows down the curling deceleration and has a longer relative displacement. At 60.1, the angular acceleration is 31rad/s, relative displacement is the shortest. So as to help athletes formulate real-time strategies, and also promote curling to be better popularize and theoretical.
Analog integrated circuit design with machine learning
Authors: Gao Sirui
Published: August 2023

Due to the widespread application of semiconductor technology in integrated circuits, more and more design studies on analog integrated circuits are gradually being implemented. However, due to the nature of analog integrated circuits, it is time-consuming and inefficient. Therefore, there are lots of experts studying how to reduce the design cycle of analog ICs. The use of machine learning in analog circuits stands out, as machine learning-based design methods have significantly reduced the analog cycle time. This review report will first introduce the algorithms related to machine learning, and the second half will outline the existing applications of machine learning in an analog integrated circuit and compare them.
Application of BIM technology in construction project
Authors: Liu Yingchao
Published: August 2023

With the continuous improvement and development of global BIM technology, BIM technol-ogy has gradually penetrated all stages of the construction industry. Construction enterprises can use BIM tech-nology to further improve the building design, construction, cost, and other work. Improve building quality and construction efficiency. However, how to truly apply BIM technology to actual construction projects is still a huge challenge. This paper first combines the theory and characteristics of BIM technology, analyzes the construction process of BIM technology applied in actual engineering projects as a starting point, and studies the feasibil-ity analysis of BIM technology in engineering projects by reviewing the literature. And some problems exist in BIM technology and give corresponding suggestions. The utilization rate of BIM technology in all stages of the construction process is improved, the development of BIM technology in enterprises is promoted, and more BIM technology application-oriented talents are cultivated for enter-prises.
Design, analysis and implementation of A/D converter for switching power supply
Authors: Liu Chang
Published: August 2023

The A/D conversion circuit is an important part of switching power supply equipment, and the circuit design has a great influence on the conversion accuracy. This paper mainly discusses the current mode circuit, gives the difference between it and voltage mode, and studies the design idea and circuit of the A/D conversion circuit. In this paper, the current mode circuit is composed of basic components, and the A/D conversion of the switching power supply is realized by switching current mode. The reason of A/D conversion error is that when the current mirror is not strictly matched, it is caused by the limited input and output resistance of MOS tube, and an operational amplifier is added between the drain and gate of the current mirror to improve the A/D conversion accuracy. The results show that the current mode is used to realize A/D conversion, which has low power consumption and fast conversion speed.
A review of reactive power optimization algorithm in power system
Authors: Ma Yijun
Published: August 2023

The paper analyses the significance of reactive power optimization, generalizes the current situation of power system development. Various optimization algorithms were introduced in this paper such as traditional optimization algorithm, intelligence optimization algorithm, including the methods of linear programming, Newtons method, heuristic optimization algorithm, etc. This research analyzes the advantages and disadvantages of each algorithm and its application direction by comparing their outstanding performance in solving discrete variables and continuous variables. The purpose of the research is to find the optimal solution of reactive power optimization algorithm, minimize the transport network loss of power system, and improve the quality of users.
Modified Tsallis Holographic Dark Energy
Authors: Bharali J. , Das K.
Published: August 2023

In this work we propose Modified Tsallis Holographic Dark Energy (MTHDE) in General Relativity (GR) in the framework of Bianchi type III space-time. Einstein's field equations are solved by using a special law of variation of Hubble parameter H proposed by Berman which yields constant deceleration parameter (DP). Interestingly, for the two different constant values of deceleration parameter, we have obtained two different cosmological models. The model 1 behaves like a quintessence dark energy model whereas model 2 behaves like a cosmological constant model. A correspondence between model 1 and quintessence scalar field is established. The quintessence dynamics of the potential and scalar field are reconstructed which illustrates the accelerating phase of the Universe. Various parameters like deceleration parameter, Hubble parameter, anisotropy parameter, equation of state (EOS) parameter, etc. for both the cosmological models are thoroughly discussed. The results obtained are found to be consistent with the recent observations on the present-day Universe.
В данной работе мы предлагаем модифицированную голографическую темную энергию (MTHDE) Цаллиса в общей теории относительности (ОТО) в рамках пространства-времени типа Бьянки III. Уравнения поля Эйнштейна решаются с использованием специального закона вариации параметра Хаббла H, предложенного Берманом, который приводит к постоянному параметру замедления (DP). Интересно, что для двух разных постоянных значений параметра замедления мы получаем две различные космологические модели. Модель 1 ведет себя как модель квинтэссенции темной энергии, тогда как модель 2 ведет себя как модель космологической постоянной. Устанавливается соответствие между моделью 1 и квинтэссенциальным скалярным полем. Проводится реконструкция кинематики квинтэссенции потенциала и скалярного поля, иллюстрирующая ускоряющуюся фазу Вселенной. Тщательно обсуждаются различные параметры, такие как параметр замедления, параметр Хаббла, параметр анизотропии, параметр уравнения состояния (EOS) и др. для обеих космологических моделей. Полученные результаты оказываются согласованными с последними наблюдениями современной Вселенной.
Движение частицы в поле бесконечного плоского слоя
Authors: Авакян Р. М. , Саарян А. А. , Джибилян С. С.
Published: August 2023

В настоящей работе в рамках общей теории относительности исследуется движение светового сигнала и пробной частицы в поле бесконечного плоского слоя. Рассмотрены оба случая внешнего решения для гравитационного поля в вакууме, соответствующие метрикам Риндлера и Тауба. Определяются время движения и путь, пройденный частицей до ее остановки. Показано, что в геометрии Тауба, в отличие от светового сигнала, материальная частица не достигает сингулярности. Определено минимальное расстояние от сингулярности в зависимости от энергии частицы. Для сравнения приводятся результаты в рамках специальной теории относительности.
In this paper we investigate the motion of a light signal and a test particle in the field of an infinite flat slab within the framework of the general relativity. Both cases of the external solution for the gravitational field in the vacuum, corresponding to the Rindler and Taub metrics, are considered. The time of motion and the path traveled by the particle before it stops are determined. It is shown that in the Taub geometry, in contrast to the light signal, a material particle does not reach a singularity. The minimum distance from the singularity is determined depending on the energy of the particle. For comparison, results are given within the framework of the special relativity.
Significance of correlation in statistics
Authors: Walizada Sayeeda
Published: August 2023

Correlation quantifies the degree and direction to which two variables are related. Correlation does not fit a line through the data points. The sign (+, -) of the correlation coefficient indicates the direction of the association. The magnitude of the correlation coefficient indicates the strength of the association, e.g. A correlation of r = - 0.8 suggests a strong, negative association (reverse trend) between two variables, whereas a correlation of r = 0.4 suggest a weak, positive association. A correlation close to zero suggests no linear association between two continuous variables. Linear regression finds the best line that predicts dependent variable from independent variable. The decision of which variable calls dependent and which calls independent is an important matter in regression, as it'll get a different best-fit line if you swap the two. The line that best predicts independent variable from dependent variable is not the same as the line that predicts dependent variable from independent variable in spite of both those lines have the same value for R2. Linear regression quantifies goodness of fit with R2, if the same data put into correlation matrix the square of r degree from correlation will equal R2 degree from regression. The sign (+, -) of the regression coefficient indicates the direction of the effect of independent variable(s) into dependent variable, where the degree of the regression coefficient indicates the effect of the each independent variable into dependent variable.
AVALIAÇÃO DO ESTADO NUTRICIONAL DE CRIANÇAS EM AMAMENTAÇÃO EXCLUSIVA SEGUNDO CRITÉRIOS DO SISTEMA DE VIGILANCIA ALIMENTAR E NUTRICIONAL
Authors: Costa Larissa Silva Gradil , Silva Nilzene Souza , Assis Francislene de Jesus , Da Silva Joyce Karollayne , Oliveira Witória Beatriz de Brito , De Medeiros Naiara Oliveira , De Araújo Karen Larisse Santos , De Araujo Márcia Valéria Maia , Gadea Larissa dos Santos , Costa Maíra Damasceno
Published: August 2023

O aleitamento materno exclusivo até os seis meses de vida é considerado como um alimento completo, assegura proteção imunológica e garantia nutricional para a criança. Além disso, é capaz de promover benefícios para a saúde física, mental e psíquica da criança e da mulher que amamenta. O leite humano tem composição específica que se ajusta de acordo as necessidades nutricionais, metabólicas e fisiológicas de cada fase do lactente. Traz em sua composição fatores imunológicos como anticorpos IgA, IgM e IgG, neutrófilos, linfócitos B e T, lactoferrina, lisozima e fator bífido, que protegem a criança contra doenças e infecções. Trata-se de um estudo transversal, descritivo, ecológico e quantitativo, onde avaliou-se por meio de dados secundários a partir de relatórios públicos consolidados do Sistema de Vigilância Alimentar e Nutricional (SISVAN), no período de 2019 a junho de 2023, o estado nutricional de crianças de ambos os sexos, na faixa etária de 0 a 6 meses de vida em aleitamento materno exclusivo. Observou-se, o predomínio do peso adequado para idade em todos os anos estudados. Contudo, nota-se uma queda dos valores no decorrer do período, comparando-se o ano de 2019 (83,75%) e o ano posterior, 2020 (77,37%) houve uma queda de 6,38%. Verifica-se que o diagnóstico de peso muito baixo para idade saltou de 4,33% para 11,03%, sendo que 2022 apresentou o maior quantitativo de bebês nessa classificação, com 10,36% (n=588) para o ano.

Apesar da elevada taxa de adequação do peso, é crescente o número de crianças com peso muito baixo para idade. O aleitamento materno exclusivo nesse período é indispensável para o desenvolvimento e crescimento saudável dos lactentes, favorecendo assim, a redução de doenças que se perpetuam até a vida adulta.
Nghiên cứu công nghệ đúc phôi hợp kim 49K2ΦA làm lõi stato của máy phát điện nhỏ trong quân sự
Authors: Nguyễn Văn Dương , Nguyễn Thanh  Hùng , Lê Minh  Đức , Lục Vân  Thương
Published: August 2023

Trong bài báo này đã tiến hành phân tích, lựa chọn công nghệ và thiết bị nấu luyện phôi hợp kim 49K2ΦA. Trong các phương pháp nấu luyện tiên tiến, phương pháp nấu luyện hợp kim 49K2ΦA trong lò cảm ứng chân không phù hợp hơn cả, do cung cấp khả năng kiểm soát tốt nhất đối với thành phần hóa học hợp kim, các nguyên tố vi lượng có lợi và tạp chất có hại. Phôi đúc hợp kim 49K2ΦA được nấu từ Fe, Co, V sạch kỹ thuật và FeV80 có chất lượng tốt, thành phần hóa học đảm bảo. Hàm lượng các tạp chất (C, P, S) ảnh hưởng xấu đến tính chất từ của hợp kim đều nhỏ hơn mẫu đối sánh của Nga. Phương pháp sử dụng FeV công nghiệp mặc dù cho hàm lượng P, S cao hơn đôi chút song có thể được xem xét lựa chọn do sử dụng nguyên liệu rẻ hơn so với phương án sử dụng V sạch kĩ thuật.
Recent advances in thermal imaging and its application in military
Authors: Nguyen Duong , Pham Dinh Quy  , Trinh Viet Ha
Published: August 2023

Infrared cameras are versatile technology studied and utilized in enormous distinct applications ranging from human life-supporting fields such as industrial, building science, and medical to research and development area. Especially the exploitation of thermal imaging of infrared detectors is a potential candidate in military equipment and weapon for observing the target accurately in long-distance with many obstacles. The modification in thermal imaging sensors structure with uncooled and cooled detectors provides new concepts of incredibly sensitive devices with thermal. Here, the technical developments in Gen-generation devices for thermal imaging are discussed and studied outstandingly.
Rectenna structure analysis for ambient RF Energy Harvesting
Authors: Linh Nguyễn Thùy , Nguyen Huy Hoang , Luong Duy Manh
Published: August 2023

The paper proposes an efficient structure of RF Energy Harvesting (RFEH) system that can improve efficiency of the system. The paper analysis and indicate relationships between characteristics of the RFEH system such as: center frequency, bandwidth, Q factor, passive gain, and number of rectifier stages. After that, paper proposes design steps to design the RFEH system in which high enough Q and wide bandwidth are guaranteed. The RFEH system is designed and tested to proved the effectiveness of the proposed method. Mesurement results show that a sensitivity of 1V output DC voltage reaches at -20 dBm input power of 950 MHz signal. The power conversion efficiency (PCE) of the system is 57% at -10 dBm input level. The system can generate 3.58  output power when input power of the LTE signal is -19.4 dBm.
Reduced graphene oxide aerogel for supercapacitor electrode
Authors: Ngô Văn Hoành , Phung Xuan Thinh  , Le Huu Thanh  , Le Trung Hieu  , Ngo Tien Quyet  , Nguyen Tran Hung
Published: August 2023

In this study, the rGO aerogel material was successfully fabricated by freeze-drying combined with high-temperature reduction method. The characteristics of rGO aerogel were investigated by modern techniques such as SEM-EDX, XRD, Raman, N2 adsorption and desorption. Electrochemical properties were studied through cyclic potential scanning (CV), charge-discharge (GCD) and electrochemical Imdependance Spectroscopy (EIS) methods in 6M KOH electrolyte solution. Research results show that rGO aerogel has a large specific surface area and pore volume of 162.4 m2/g and 0.237 cm3/g, respectively, and a large specific capacitance of 90 F/g at a current density of 0.1. A/g and long charge-discharge life with specific capacitance reaching 87.5% after 500 charge-discharge cycles.
Victoria’s Energy Transition using n Bottom Line Analysis
Authors: Currie Glen , Cousins Riley , Diplaris Alexander , Drimer Sebastian , Foley Matthew
Published: August 2023

To achieve net-zero emissions by 2050, Australia must decarbonise the energy sector and other sectors. The 'energy transition' is driven by policy-led construction of renewable infrastructure and regulation changes. However, no holistic analysis of the path forward currently exists. This research aims to develop a clear plan for Victoria's energy transition by evaluating three scenarios. A Business as Usual (BAU) scenario is compared against two alternative solutions. The alternates emulate two of Victoria's possible trajectories. Alternative 1 (ALT1) focuses on Victoria's reliance on imported interstate renewable energy, while Alternative 2 (ALT2) involves Victoria becoming self-sufficient through renewable generation. Each of the three scenarios is compared across four bottom lines: technical performance, social, economic, and environmental. Interviews among energy experts revealed that economic and social metrics were considered most important. Applying the n-bottom line (nBL) assessment framework delivers a result that finds ALT2 and ALT1 tied as the preferred solution. Hence, the construction of renewable infrastructure in Victoria and increased interstate transmission capacity should be built. Further research could include a deeper understanding of the embodied carbon in infrastructure built for the energy transition.
Por uma poética da melancolia:
Authors: De Souza Miranda Mariana Alice
Published: August 2023

Este artigo analisa o conto “O fio”, inserido na obra Os Sete Sonhos (1967), do escritor Samuel Rawet. Buscamos demonstrar, tanto no plano formal quanto no do conteúdo, como a teoria da melancolia, segundo Sigmund Freud (2010) e Giorgio Agamben (2007), pode ajudar a desvelar os sentidos deste conto, além de outros do autor. Para isso, nossa análise literária, com suporte teórico também em Bines (2012),  Brasil (1975) e  Ginzburg (2012), se apoiará nas reflexões da filosofia e da psicanálise sobre a melancolia, para melhor compreender a poética rawetiana.
Trânsitos históricos na construção literária de Ana Miranda
Authors: Gonçalves Moraes Claudia Letícia , De Castro Pereira Danglei
Published: August 2023

A presente pesquisa analisa o trabalho de reescrita da história da literatura brasileira em duas obras literárias de Ana Miranda que versam sobre a vida do poeta seiscentista Gregório de Matos, a partir da sua representação ficcionalizada enquanto personagem. O corpus literário é composto pelo romance Boca do Inferno (1989) e pela biografia romanceada Musa Praguejadora (2014), sendo destacada, dentro das referidas obras, a questão da ficcionalidade nos romances a partir de um recorte amplo nos limites entre literatura e história, as quais guardam modos peculiares de aproximação com o real. Assim, propõe-se com esta pesquisa investigar as intersecções entre literatura e história e a construção intertextual nas obras. Para a discussão aqui proposta, portanto, foram utilizadas obras de autores que dialogam com os entrelaçamentos entre os dois campos do saber, tais como Alfredo Bosi (2013, 1992), Beatriz Sarlo (2007), Peter Burke (1997; 1992), Linda Hutcheon (1991) e Lukasz Grützmacher (2006), dentre outros. As teorias propostas dialogarão diretamente com a construção romanesca da autora com o objetivo de propor uma análise destas obras da literatura recente de nosso país buscando compreender a dimensão histórica do texto literário e sua representação enquanto parte formadora da identidade nacional, propondo um diálogo entre os séculos XVII e XXI. Pretende-se, como resultado do trabalho, discutir, a partir das categorias de análise, o empreendimento de reconstrução do passado nas tensões e hibridações entre os campos da literatura e da história que a autora faz para trazer de volta a persona do poeta Gregório de Matos Guerra.
Antropologia e Literatura:
Authors: Nascimento da Costa Maria do Socorro , Amorim Oliveira Ana Caroline , Navarrete Tolomei Cristiane
Published: August 2023

Entre a Ciência e Arte é inegável a existência de fronteiras que as mantiveram separadas por um longo período, graças aos deslocamentos teórico-metodológico emergidos depois da metade do século XX, tais fronteiras começaram a ser diluídas. Desse modo, tanto a Arte quanto a Ciência, são atividades humanas e atividades conscientes, todavia, alguns artistas atribuem à sua arte uma gênese do inconsciente. Posto isto, este ensaio, tem por objetivo averiguar as aproximações entre a Antropologia (ciência) e a Literatura (arte), analisando os pontos de confluências entre os escritos etnográfico e o texto literário, tal como seus afastamentos também, considerando que ambas as atividades – etnógrafo e  literato- se apropriam da linguagem para construir suas narrativas. Para este estudo- de cunho bibliográfico- utilizaremos Giddens (2007), Lévi-Strauss (1980), Geertz (1989) e Clifford (2002; 2016) para dar conta da antropologia e do fazer do etnógrafo; Todorov (2009), Compagnon (2010), Barthes (2007) para sustentar os pressupostos da arte literária e da crítica.
Escala de Estado Funcional no pós-COVID-19: uma revisão integrativa
Authors: Balduino da Silva Joseph Sebasthian , de Sousa Camelo Lima Raissa , Lima Galeano Caroline , Guaripuna Ferreira Maynara , Felipe Justino Fonseca Matheus , Luciana Magnani Seki Karla
Published: August 2023

O impacto da COVID-19 nas estruturas e funções dos diversos sistemas corporais é amplo e contribui para redução da capacidade funcional do indivíduo, que é refletida pelo baixo desempenho em atividades de vida diária (AVD) e na participação social. A PCFS é uma escala que foi desenvolvida para avaliar especificamente o estado funcional de pacientes acometidos pela COVID-19. É composta por cinco níveis e abrange os desfechos funcionais, pois concentra-se nas limitações de tarefas, atividades habituais e mudanças no estilo de vida, Dessa forma, o objetivo desta revisão foi analisar dados da literatura relacionados a utilização da PCFS em adultos no período pós infecção pelo coronavírus. Método: Foram cruzados os termos “COVID-19 AND PCFS scale  OR coronavírus AND Functional Status“ nas bases National Library of Medicine (PubMed) e biblioteca virtual de saúde (BVS), resultando em 40 artigos publicados em inglês e espanhol, no período de dezembro de 2019 a fevereiro de 2023. Resultados: Foram incluídos 15 estudos. A amostra total foi composta por 4.407 indivíduos com média de idade de 51 ± (13,17) anos,  sendo 3.065 mulheres e 1.352 homens. A HAS foi a comorbidade mais prevalente 378. Em relação à PCFS 88% da amostra apresentou algum grau de limitação funcional, sendo que: 1401 foi moderada (grau 3), 1177 limitação leve (grau 2), 771 apresentaram limitações muito leves (grau 1) e 125 apresentaram limitações graves (grau 4). Conclusão: Idade avançada, sexo feminino, presença de comorbidades e período prolongado de internação em UTI conferem risco aumentado para declínio funcional no pós-COVID-19. A PCFS mostrou-se como um instrumento adequado para identificação e estratificação de limitações funcionais e atua como ferramenta complementar na elaboração do prognóstico e protocolos de reabilitação específicos
Uso da dieta cetogênica para o tratamento da epilepsia refratária no estado de Mato Grosso do Sul
Authors: Louveira Suriano Natalia , Capelli de Lima Ana Beatriz , Freitas Karine de Cássia , Fernandes Dayane Stéphanie
Published: August 2023

A epilepsia é uma doença neurológica que afeta milhares de pessoas ao redor do mundo. Dentro de suas especificações, existe a epilepsia refratária na qual as crises não são controladas com a associação de 2 a 3 medicamentos, sendo nestes casos indicado o uso de tratamentos alternativos, como a aplicação da Dieta Cetogênica (DC) que vem se mostrando eficaz ao longo dos anos. Diante disso, o presente estudo teve como objetivo identificar o nível de conhecimento de nutricionistas acerca da utilização da DC como via de tratamento da epilepsia refratária. Foi realizado um estudo transversal descritivo constituído pela aplicação de formulário online para nutricionistas que atuam no estado do Mato Grosso do Sul. Participaram 44 nutricionistas e como resultado obteve- se que 84,1% conhecem o uso da DC como via de tratamento em portadores de epilepsia refratária, sendo que 52,3% aprendeu sobre o tema durante a graduação ou especialização. A DC como tratamento foi aplicada por apenas 27,3% dos participantes. Em conclusão, pode-se inferir que a maioria dos profissionais possui um nível moderado de conhecimento sobre DC derivado principalmente da literatura existente e não da experiência prática, provavelmente devido à sua aplicabilidade limitada.
Factores quirúrgicos pronósticos del neuroblastoma en el Centro Regional Oriental de Oncología Pediátrica de Holguín, Cuba
Authors: Quintero Nicó Wilmer , Jiménez Reyes Maria , Zúñiga Fuentes Yoselin Nohemí , Rojas Yela Edwin Rafael , Barragán Gualpa María Isabel , Salas Moreira Melanie Corina
Published: August 2023

Introducción: El neuroblastoma es la neoplasia sólida fuera de la cavidad craneal más frecuente en la edad pediátrica. Su particularidad se refleja en varias características clínicas y biológicas que se toman en cuenta para predecir los resultados terapéuticos.
Objetivo: Identificar los factores quirúrgicos pronósticos en los pacientes diagnosticados con neuroblastoma en el Centro Regional Oriental de Oncología Pediátrica de Holguín, Cuba, durante la etapa comprendida de enero de 2010 a diciembre del 2022.
Métodos: Se realizó un estudio descriptivo retrospectivo en 18 pacientes en los que se realizó la descripción de las variables: clínicas epidemiológicas, métodos de imágenes, diagnóstico patológico, tipo de cirugía y evolución.
Resultados: El 50 % se diagnosticó antes del año de vida, con predominio en las niñas (66,65 %), en la localización abdominal y con afectación de la suprarrenal izquierda (87 %). La ultrasonografía, en asociación con la tomografía axial computarizada, permitió el diagnóstico inicial en un 94,50 %, y resultó de gran utilidad en la identificación de factores de riesgos quirúrgicos (78 %). El diagnóstico patológico evidenció predominio de los grados indiferenciados en el 66,70 % y en estadios más avanzados III y IV (55,60 %). Se realizó cirugía primaria (28 %) y secundaria (44 %), con un 28,0 % de fallecidos.
Conclusiones: Esta enfermedad continúa siendo un desafío quirúrgico y, en ausencia de determinantes moleculares y citogenéticos, los factores clínicos e histopatológicos constituyen los de especial relevancia y correlación pronóstica. La transición estandarizada hacia la utilización de la clasificación pretratamiento de riesgo quirúrgico por imagenología es fundamental para la definición de la modalidad terapéutica a emplear.
Dental fear and its related factors among patients managed in a paediatric dental clinic of a university hospital in Tanzania
Authors: Sohal Karpal Singh , Mtaya-Mlangwa Matilda , Essajee Sakina
Published: August 2023

Objective: This study aimed to determine the prevalence of dental fear and its related factors among patients managed in a pediatric dental clinic of a university hospital in Tanzania.

Material and Methods: This was a cross-sectional study carried out at the paediatric dental clinic of the Muhimbili University of Health and Allied Sciences(MUHAS) between November 2018 and April 2019. It included all paediatric dental patients aged between 6 and 12 years. A questionnaire used in this study captured information regarding patient's socio-demographic characteristics and the number of previous visits to the dental clinic. A fifteen-item Children's Fear Survey Schedule - Dental Subscale (CFSS-DS) was used to assess the dental fear status in these pediatric patients.

Results: A total of 223 paediatric dental patients aged between 6 years and 12 years were included in the study. The mean age of participants was 9.52 ± 1.74 years with a male to female ratio ofl: 1.04. The means CFSS-DS score was 31.1 ± 8.57. Fear scores were high for Injections (3.37 ± 1.13), a stranger's touch (2.81 ± 1.08) and choking (2.69 ± 0.99). The presence of dental fear was found to be significantly associated with the parents' education level (p=0.001) and previous dental visits (p < 0.001 ).

Conclusion: The results of this study suggest that the prevalence of paediatric dental fear was low among the participants of this study. The education level of parents and previous dental visits were determinants of dental fear in children. Injections, being touched by strangers, and choking were the common fear-provoking factors.
Accuracy of Mid-Trimester Ultrasound Scan in Foetal Gender Determination at the University College Hospital, Ibadan Nigeria
Authors: Akinmola Janet A , Oni Olaolu O. , Bello Oluwasomidoyin O
Published: August 2023

Objectives: This study aimed to determine the accuracy of prenatal sonographic gender determination during foetal anomaly ultrasound and the overall sensitivity pattern in our institution.

Materials and Methods: A cross-sectional study of 520 consenting pregnant women who presented for foetal anomaly scans within a one-year period in our institution. The diagnostic accuracy of gender determination during the anomaly and delayed scans were determined by comparing the sonographic gender with the birth gender and calculating sensitivity, specificity, positive predictive value and negative predictive value. Data were analyzed using the Statistical Package for Social Sciences (SPSS) version 20. Descriptive statistics, frequencies, Mc-Nemar chi-square test were used at 5% level of significance.

Results: The mean maternal age was 31.51 ±5.02years. Of the 520 consenting pregnant women studied, 16(6.0%) women were having twin gestation. Four hundred and ninety-seven (92.7%) genders were determined during foetal anomaly scan. The accuracy of the ultrasonography (US) examination performed by the resident doctors was 98.02% while the accuracy of the scan performed by the consultant radiologists was 100%. Overall, the accuracy of the gender determination on ultrasound was 98.69%. The general specificity and sensitivity of the US were 98.71 % and 98.68% respectively while the positive and negative predictive value were 99.01 % and 98.29% respectively.

Conclusion: The accuracy of ultrasound examination in detecting foetal gender during foetal anomaly ultrasound is high with equally high predictive values and therefore it is recommended as a mandatory variable during anomaly scans. There is need for continuous training of resident doctors or operators in lower cadre to improve their competency in foetal gender determination.
Multicentric Castleman Disease a Diagnostic Dilemma: A Case Series of Three Patients Seen at a Tertiary Health Facility in Zambia
Authors: Mukonde Frank , Musonda Francis , Liusha Namakando
Published: August 2023

Background: Castleman disease (CD) is a heterogeneous group of lymphoproliferative disorders of uncertain cause presenting with lymphadenopathy. There are three generally described immunological disorders of CD that occur in individuals of all ages and share a similar microscopic lymph node appearance but different immunohistochemical profile. Oftentimes, diagnosis can be challenging where histology is not done, with most patients being presumptively treated as tuberculous (TB) adenitis.

Method & Results: We present three case reports of CD, one is of an Human Immunodeficiency Virus (HIV) naive patient, the other two are in HIV positive patients. All three patients presented with fever, recurrent anemia and generalized lymphadenopathy. W hole body Computed Tomography (CT) scans as well as excision biopsies (for histopathology and immunohistochemical staining for Human Herpes Virus-8 (HHV-8) were done on all three patients.

Case 1: Idiopathic Multicentric Castleman Disease in a 20 year old male patient who also developed TAFRO syndrome (Thrombocytopenia, Ascites, myelo Fibrosis, Renaldys functionand Organomegaly) in the course of the illness. Case 2 & 3: HHV-8 associated Multi centric Castleman Disease in HIV positive 42 year and 27 year old female patients respectively. The 42 year old received chemotherapy for six months, and had symptomatic relief and remission, while the 27 year old was yet to commence chemotherapy.

Discussion: Most cases of CD go undiagnosed or mostly misdiagnosed for other common causes of lymphadenopathy in Zambia. These are the first case reports in our hospital, with notable backgrounds of physicians having suggested TB treatment from the referring facilities.

Conclusion: Both HHV-8 and none-HHV-8 associated CD may be very common in our population, and there is need for prompt biopsy, reporting and treatment of all patients presenting with lymphadenopathy in our hospitals.
Disassembling Process Inference Using Positional Relations Matrix for Complicated Machines
Authors: Yamada Kaori , Monma Tatsuya , Hanahara Kazuyuki
Published: August 2023

Disassembling of a part is required for maintenance of machinery in case. However, the disassembling process is often not explained in the operation manual, or the explanation of the disassembling does not cover all the situations of all the individual parts, even though, such disassembling could be dealt with by operators that are not familiar with the mechanism of machine. Operators themselves have to determine the disassembly process in such a case. Therefore, it is crucial to develop a system that helps inexperienced operators to find out a proper disassembling process. We focus on the disassembling of a specific part referred to as a target part. The approach is based on the positional relation information among the parts. The positional relations matrix that obtained from the contact states of any two parts in all possible directions and can be generated from the ordinary CAD data. This study proposed a method to infer a disassembly process of a specific part based on the positional relation matrix. The method deduces the disassembly process of the target part with the shortest steps, in the condition of one-part-at-a-time manner. We also introduced an integration of disassembling parts based on the obtained process. A case study was conducted and the result confirmed the feasibility of the proposed method; the effectiveness of the integration approach was also demonstrated.
La educación del siglo XXI: hacia el rescate de la conciencia
Authors: Linares Borja Janet
Published: August 2023

En el presente artículo se hace una reflexión sobre la educación del Siglo XXI, inicia con una reseña de la globalización y de las grandes revoluciones tecnológicas y científicas como la cuántica, la informática y la biomolecular, luego se analiza la necesidad de una educación con una perspectiva holística que le permita al ser humano rescatar su conciencia, con miras a superar los paradigmas actuales de la educación y propenda por la formación de seres humanos conscientes de su responsabilidad tanto individual como global y con una inteligencia espiritual acorde con los requerimientos de la época.
Diseño, desarrollo e implementación del ambiente virtual de aprendizaje de la Escuela Tecnológica Instituto Técnico Central
Authors: Martínez Rodríguez Fernando , Caro Pedro Julio , Herrera Romero Martha Cecilia , Duarte Luisa Fernanda , Ramos Oscar Andrés , Blanco Andrés , Supanteve Carlos , Ñustes Juan Carlos , Torres Giovanny , López Alexander , Cujavante Soraida , Velásquez Diana , García Diana , Morales Jorge , Roa Sandra Milena
Published: August 2023

Este escrito presenta los avances del proyecto “Diseño, desarrollo e implementación de una Ambiente Virtual de Aprendizaje (AVA) para la ETITC” establecido como una respuesta tecnológica a la necesidad de integrar los procesos de docencia, investigación y proyección social en un sitio web interactivo que permita la comunicación entre profesores, estudiantes, personal administrativo y visitantes haciendo uso de herramientas desarrolladas con tecnologías web 2.0. Como avances se presentan los perfiles de ocho proyectos de investigación adelantados por los estudiantes del programa de tecnología en sistemas, en los cuales se usa la metodología de proceso unificado, el lenguaje de programación PHP, Java Script, CSS, Ajax, el motor de base de datos PostgreSQL y programación según el patrón de arquitectura de software Modelo Vista Controlador (MVC), que integrados en un Desarrollo Web buscan dar una solución tecnológica a necesidades reales de la institución.
Creación de la distribución DVD-Live Linux K-Demy
Authors: Baquero Rey Luis Eduardo , Pérez López Carlos Andrés , Rojas Amador Sócrates
Published: August 2023

Este escrito presenta algunos avances del proyecto “Distribución base DVD live K-demy versión 0.4B” formulado por el grupo de investigación en software, gestión y desarrollo de nuevas tecnologías de información (K-Demy) de la Escuela Tecnológica Instituto Técnico, el cual pretende integrar de manera sencilla, didáctica y colaborativa distintos paquetes educativos con licencia GPL (Licencia Pública General) para la educación preescolar, básica y media en las áreas de lenguaje, matemáticas y ciencias, en una solución económica de software libre que fortalezca el proceso de enseñanza aprendizaje. En la realización de la investigación se utilizó SCRUM por ser una metodología ágil de desarrollo de proyectos que busca construir el producto de forma iterativa e incremental, lo cual ha permitido investigar, analizar y compilar cerca de 81 programas correspondientes a 11 áreas del conoci- miento en una solución tecnológica que se encuentra en actualización para beneficio de la comunidad académica.
PEMBERIAN HAK GUNA BANGUNAN DI ATAS HAK PENGELOLAAN: ALTERNATIF PENYELESAIAN MASALAH TANAH PENSIUNAN TNI-AL DI KAVLING PANGKALAN JATI
Authors: Dwi Librianto  , Lutfi Djoko Djumeno  , Fahrul Fauzi
Published: August 2023

The 26.7-hectare land in the Pangkalan Jati plot has become a polemic for retired Indonesian Navy Army who live on the land. Plans related to the transfer of the Pangkalan Jati plots of land to holders of Development Permits faced several obstacles and tended to stagnate. This research is intended to provide a recommendation for solving the problem with the solution of granting the right of building on land with the right of management. This research is normative legal research, namely legal research whose data comes from library materials or what is usually called secondary data. This research resulted in a policy recommendation that the Ministry of Defense in this case the Navy is a legal subject that can be granted the right of management based on legislation because it is included in the category of Central Government Agencies. The problem of transferring land ownership in the Pangkalan Jati plots currently occupied by retired Indonesian Navy can be resolved by a mechanism for granting land rights over land with the right of management. Where the residents of the Pangkalan Jati plots can be given the right of building because the designation of most of the land is for residence. The right of building can be granted because the residents of the Pangkalan Jati plots who are Indonesian citizens fulfill the criteria as legal subjects holding the right of building. The granting of right of building over land with right of management is carried out with a Land Utilization Agreement between the Ministry of Defense, in this case the Indonesian Navy, and residents of the Pangkalan Jati plots. Residents of Pangkalan Jati plots as the right of building holders will later have rights and obligations that can be enjoyed and implemented. The granting of the right of building over land with right of management is expected to be a solution to the problem of land ownership in the Pangkalan Jati plots so as to provide legal certainty for both parties.