bluuebunny/crossref_metadata_2025 huggingface dataset:
CARACTERIZAÇÃO MORFOLÓGICA DE MICROFIBRAS ELETROFIADAS DE POLIESTIRENO
Authors: Carvalho Beatriz Marques , Dias Gabriel da Cruz , Maruoka Luz Marina Andrade , Boina Rosane Freire , Agostini Deuber Lincon da Silva
Published: November 2023

Since wastewater treatment is of great interest to society, it is important to develop techniques that perform this treatment by removing pollutants such as dyes, pesticides, and metals. In this context, adsorption stands out as a promising method in the treatment of effluents, allied to this, as polymeric membranes considerably improve the ability to remove pollutants. Carbon-based additives, such as graphene oxide, have been used in the area of adsorption because they are an adsorbent capable of removing metallic ions and dyes. Thus, it is interesting to carry out studies of the polystyrene polymer with graphene oxide, aiming at the production of adsorbent membranes. To this end, the production of polystyrene was first analyzed, with graphene oxide added to the polymer matrix in the future. Thus, polystyrene microfibers were produced using the electrospinning technique and analyzed morphologically using optical microscopy and scanning electron microscopy (SEM). With the help of ImageJ and OriginPro 8.5 software, a histogram of the frequency distribution of microfiber diameters and the normal curve was created. Through the results obtained, it was observed that there was the production of microfibers with considerable morphology, as fibers with beads and agglomerates were not observed.. From the histogram, it was noted that the microfibers had an average diameter of 5.73 µm.
REVISÃO DO FOTOSSENSIBILIZADOR FTALOCIANINA UTILIZADA NA TERAPIA FOTODINÂMICA E SUA APLICABILIDADE FRENTE AO TRATAMENTO DE DIVERSOS AGENTES PATOGÊNICOS
Authors: Oliveira Gabrielly Lorraynny Martins de , Braga Gustavo , Caetano Wilker , Campanholi Katieli da Silva Souza
Published: November 2023

Photodynamic therapy (PDT) is a treatment modality already used in several countries to treat invasive and topical diseases. In these treatments, the combination of a photoactive drug (PS), visible light, and molecular oxygen results in the formation of singlet oxygen, a type of highly reactive/cytotoxic oxygen species. Phthalocyanines incorporated into solubilization/monomerization systems are photosensitizing substances used in PDT, even given their high hydrophobicity. Its inhibitory capacity against microorganisms and its photodynamic action against various cancer cell lines have made it the protagonist of several scientific articles. This review article provides a brief overview of the concept of PDT and its potential use in the treatment of diseases - an emerging treatment modality in Brazil.
Avaliação de modelos para sensores virtuais em sistemas IoT tolerantes a falhas
Authors: Loch Wagner , Mattos Júlio C. B. , Soares Rafael I.
Published: November 2023

Com a crescente evolução das tecnologias de informação surgem soluções mais eficientes e integradas tal como os sensores virtuais para dispositivos IoT. O sensor virtual é uma técnica que permite estimar dados de sensores físicos em dispositivos IoT de acordo com um contexto da aplicação. Essa técnica permite a redução de custos, de complexidade, além de uma maior flexibilidade e adaptabilidade a diferentes cenários de uso. Adicionalmente, os sensores virtuais também podem garantir tolerância a falhas em sistemas IoT, onde tradicionalmente explora-se a redundância de hardware e software. Diante desse cenário, o objetivo deste trabalho é realizar um estudo sobre modelos de sensores virtuais dedicados a tolerância a falhas em sistemas IoT a fim de minimizar erros causados por falhas no sistema. O trabalho investiga 3 diferentes modelos de sensores virtuais, além de comparar com um modelo da literatura a fim de identificar e corrigir falhas. Os resultados obtidos mostram que os erros introduzidos pelos diferentes modelos de sensores virtuais investigados indicam que o uso de média móvel é mais preciso que o uso de replicação de sensores físicos em alguns cenários.
THeTA: Protocolo TDMA adaptativo para lidar com tráfego heterogêneo e dinâmico em WBAN
Authors: Herculano Jorge F. , Andrade Luís O. S. , Pereira Willians de P. , Sá Alirio S. de
Published: November 2023

Medium Access Control (MAC) sublayer solutions based on Adaptive Time Division Multiple Access (TDMA) have been proposed to satisfy temporal constraints and improve the reliability and efficiency of Wireless Body Area Networks (WBAN) subject to unexpected communication conditions, such as dynamic message traffic and communication interferences. However, many of these solutions do not efficiently use communication channels, allocating time slots to devices that do not have data to transmit. It can be a problem because wasting time slots reduce the ability of the WBAN to recover from message loss under unexpected communication conditions. This paper introduces the THeTA, an adaptive TDMA policy for WBANs that meet time constraints and enhance the reliability and efficiency of WBANs under unexpected communication conditions, observing a better usage of the communication channels. To improve message delivery and not compromise temporal constraints, our approach allocates unused time slots from devices with low bandwidth demands to devices with high transmission demands. Compared to IEEE 802.15.4, IEEE 802.15.6, and other adaptive approaches, it was observed that the proposed approach has higher reliability, reducing message loss and maintaining low power consumption and low latency in the evaluated scenarios.
Escalonamento Horizontal em Kubernetes com Redes Neurais Artificiais para Predição de Carga
Authors: Silva Lucileide M. D. da , Silva Sérgio N. , Fernandes Marcelo A. C.
Published: November 2023

Este artigo apresenta uma abordagem inovadora para o escalonamento horizontal automático em cluster Kubernetes (K8s), utilizando Redes Neurais Artificiais. A proposta é chamada de ANN-HS e em comparação com o Escalonador Horizontal padrão do K8s (HPA), o ANN-HS demonstra eficiência superior em termos de consumo de recursos, alocação otimizada de réplicas, adaptação flexível à demanda e aderência a níveis de latência. Com modelos de regressão pré-treinados, o ANN-HS oferece ajuste personalizado de recursos, promovendo uma alternativa promissora para aprimorar o escalonamento horizontal de aplicações em ambientes de micro-serviços.
Das Recht auf Zugang zur Elternschaft
Authors: Dahlkamp Helen
Published: November 2023

This work derives a right to access to personality development through parenthood, taking into account aspects of sociology of law and comparative law, as well as the state of discussion in moral and legal philosophy; and thus, defines new standards for the European human rights protection scheme and the fundamental rights protection of the German constitution. This refers to the right to form and develop one's own personality through the relationship with a child - as an integral part of one's identity. Based on this, the work examines the implications for a reorganization of German law on reproductive medicine and outlines the necessary consequential changes in family law.
Die Assistenztrainer im Lizenzfußball
Authors: Hofer Jonas B.
Published: November 2023

This work comprehensively analyzes and evaluates how the special characteristics of the employment of assistant coaches in professional football affect the application of German labor law. In particular, the differences to head coaches are elaborated. The focus of the study is on how the integration into a coaching team influences the classification of assistant coaches under labor law. In particular, the effects on fixed-term contracts, especially relevant in professional football, as well as further termination possibilities are examined.
Tři účinky francouzské koncepce výhrady veřejného pořádku (effet atténué, effet réflexe, ordre public de proximité) – relevance pro českou právní doktrínu a praxi?
Authors: Malachta Radovan
Published: November 2023

Článek se zabývá představením francouzského přístupu k výhradě veřejného pořádku jako institutu mezinárodního práva soukromého. Hlavním cílem článku je zodpovědět otázku, zda přístup francouzské doktríny a soudní praxe, které podrobně pracují s tímto institutem, je relevantní pro českou právní vědu a praxi. Po úvodním představení výhrady veřejného pořádku se článek věnuje blíže jedné z podmínek její aplikace, a to požadavku intenzity, který má vliv na aplikaci jednotlivých podob výhrady veřejného pořádku – oslabený veřejný pořádek, veřejný pořádek blízkosti a zohledňování cizího veřejného pořádku. Tyto podoby jsou analyzovány co do podstaty, funkce a způsobu uplatnění, a současně je uvedeno, zda a případně jak se tyto podoby objevují v české rozhodovací praxi a doktríně. Závěr článku vyhodnocuje pozici českého a francouzského přístupu k výhradě veřejného pořádku a věnuje se možné inspiraci pro českou právní vědu a praxi.
Displasia tanatofórica: reporte de caso
Authors: Campos Salazar Fabiola , Peñaloza Valenzuela Juan José , Terán Castro Yesenia Tania , Torrico Aponte William Alexander , Torrico Aponte William Alexander
Published: November 2023

La displasia tanatofórica  es considerada la displasia esquelética letal más frecuente, cuya prevalencia es de 1 de cada 10.000 nacimientos. Se describe un caso de displasia tanatofórica manejado en la unidad de Medicina Materno Fetal del Hospital Materno Infantil Germán Urquidi. Se trata de una paciente de 35 años de edad segundigesta, que se hospitaliza cursando una Gestación de 25 semanas por FUM, FUV, Restricción del crecimiento intrauterino severo, Displasia Esquelética Tanatofórica (Letal) Tipo I, razón por la cual se realiza junta médica, donde se decide la interrupción del embarazo mediante parto por mal pronóstico fetal al ser una malformación letal. Se revisaron aspectos de la frecuencia, etiología, diagnóstico y pronóstico de la displasia tanatofórica.
IMPLEMENTASINYA PADA AKAD JUAL BELI DALAM PEMIKIRAN EKONOMI ABU HANIFAH
Authors: Rosyidah Eva , Rofiah Khusniati
Published: November 2023

Jual beli Online pada saat ini sangat menarik minat masyarakat di semua kalangan, dengan melakukan transaksi Online banyak sekali kemudahan-kemudahan yang diperoleh baik para pelaku ekonomi maupun pelaku bisnis. Namun, disisi lain banyak juga kecurangan-kecurangan yang dilakukan oleh para pelaku bisnis dalam transaksi Online. Artikel ini fokus membahas bagaimana transaksi jual beli Online itu berjalan dalam pendekatan studi ekonomi Islam pemikiran cendekiawan Islam Abu Hanifah. Dalam kajian ini penelitian yang digunakan adalah dengan menggunakan kajian pustaka di mana peneliti menggunakan buku, artikel, jurnal sebagai bahak kajian dan sumber teori-teori yang akan di implementasikan dalam praktik jual beli Online. Dalam pemikiran Ekonomi Islam oleh Abu Hanifah terdapat akad yang selaras dengan syarat dalam transaksi jual beli Online di mana transaksi jual beli yang disepakati dengan menentukan ciri-ciri tertentu dalam akadnya membayar harga barang terlebih dahulu setelah itu barang yang telah dipesan akan diserahkan dikemudian sesuai dengan kesepakatan antara pihak penjual dan pihak pembeli. Pada akad jual beli yang dicetuskan Abu Hanifa yaitu akad Salam dan akad Istishna’, di mana kedua akad tersebut ialah kesepakatan antara penjual dan pembeli bahwa barang yang dibeli akan dikirimkan apabila pembayaran sudah dilakukan oleh pembeli secara tunai sesuai pada kontrak yang telah disepakati.
Procesul
Authors: Kafka Franz
Published: November 2023

Procesul poate fi considerat drept un studiu despre puterea politică, o parabolă religioasă pesimistă, sau un roman polițist. Este povestea de coșmar a unui funcționar de bancă respectabil care este brusc și inexplicabil arestat și trebuie să se apere singur împotriva unei acuzații despre care el nu poate obține nicio informație. Confruntat cu această situație ambiguă dar amenințătoare, cedează treptat sub presiunea psihologică. Indiferent dacă a fost citit ca o poveste existențială, o parabolă, sau o profeție a exceselor birocrației moderne vecină cu nebunia totalitarismului, coșmarul kafkian a rezonat cu realitatea crudă pentru toate generațiile de cititori. Una dintre figurile iconice ale literaturii lumii moderne, Kafka vorbește aici despre problemele universale de vinovăție, responsabilitate, și libertate. Despre condiția umană care aruncă un individ izolat într-un sistem impersonal, ilogic, și ridică probleme provocatoare, tot mai relevante, cu privire la rolul guvernului și natura justiției.
Hydrogen production from sorption enhanced steam reforming of biogas via nickel over modified CaO sorbent
Authors:   , Phromprasit Janewit
Published: November 2023

This research composed of two parts: (i) CO2 sorption study and (ii) hydrogen production performance tests using multifunctional catalysts. In the CO2 sorption section, the first group of metals (Mg2+, Sr2+ and Al3+) was loaded on CaO and tested the CO2 sorption and desorption performance over 10 cycles. Mg-CaO-HW offered the best stability in terms of CO2 sorption/desorption. Whereas Al-CaO-HW and Sr-CaO-HW exhibited a decrease in CO2 sorption capacity corresponding to 6 and 12% reduction. The second group of metals loading on CaO were Zr4+, Ce4+ and La3+. The results indicated that Zr-CaO-HW and Ce-CaO-HW possessed stable CO2 capacities over the 10 cycles. On the other hand, La-CaO-HW showed a decrease in the CO2 sorption capacity of 16%. This was due to the low-temperature oxygen storage properties of Zr-CaO-HW and Ce-CaO-HW, which enhanced the mobility of oxygen. In the section of H2 production, three sequences of Ni2+ loading on modified CaO were investigated. The results showed that Ni-Al-CaO-HW is the best multifunctional catalyst. The stability of Ni-Al-CaO-HW shows that CH4 conversion is still higher than 90% during the pre-breakthrough period for 5 cycle operations. Furthermore, Ni2+ was loaded on the modified sorbents Zr-CaO-HW, Ce-CaO-HW and La-CaO-HW. The results showed that Ni-Zr-CaO-HW and Ni-Ce-CaO-HW produced H2 at stable purities but with decreasing CH4 conversions. This was attributed to the loss of nickel active sites at the surface of the multifunctional catalysts due to the formation of CaCO3.
Development of nickel oxide electrode for application in dopamine detection
Authors:   , Wattanasomboon Chanita
Published: November 2023

This research studied the synthesis of nickel oxide as a catalyst for dopamine detection to modified working electrode by electrochemical with cyclic voltammetry. In the system, the potentiostat connect electrode with silver/silver chloride reference electrode and platinum counter electrode. In this study, the synthesis of nickel oxide by precipitation method was compared between using sodium hydroxide (NaOH) and urea (CH4N2O) as a precipitating agent and with/without surfactant adding. It was found that nickel oxide from both precipitating agents showed an improvement of the current response when compared with unmodified nickel oxide electrode. The study of nickel oxide loading on the electrode showed the highest current response at 0.078 mg of nickel oxide loading. The modification of nickel oxide by addition of surfactant and hydrothermal treatment that found the highest current response obtain from nickel oxide modified electrode that synthesized from precipitation with urea by addition of mixed surfactant of butanediyl-1, 4-bis(dimethyldodecylammonium bromide)(C12-C4-C12,2Br-) 0.04 mM and Sodium dodecyl sulphate(SDS) 8.2 mM and hydrothermal at 120 ºC. Determination of dopamine by oxidation of dopamine was improved electrochemical response by nickel oxide modified electrode at 0.3 V of apply voltage. The detection of dopamine was operated in 10 mM phosphate buffer solution, pH 7.0 show two linear range that are 3.125 – 100 and 100 – 500 µM with sensitivity 0.0498 and 0.01 µA/µM, respectively. The limit of detection was 1.75 µM.
EFFECT OF Si/Al RATIOS AND POTASSIUM ADDITION ON ACRYLIC ACID PRODUCTION FROM LACTIC ACID ON Y-ZEOLITE CATALYSTS MIXED WITH ALUMINA
Authors:   , Satitpoom Natthapong
Published: November 2023

In this research, the effect of different potassium loading over HY100 zeolite catalysts at 0, 2, 4, 6 and 8 wt.% prepared by incipient wetness impregnation method was studied. In addition, the effect of Si/Al molar ratios (15, 100 and 500) of HY zeolite modified with potassium at 6 wt.% was also investigated. Furthermore, the effect of support ratios of Al2O3 and HY zeolite modified with potassium 6 wt.% was studied as follows: 3:1, 1:1 and 1:3. All catalysts were tested in lactic acid dehydration reaction at 340 °C of reaction temperature under atmospheric pressure and characterized by various techniques. From the results, it was found that HY zeolite modified with different potassium loading, Si/Al molar ratios of HY zeolite and support ratios of Al2O3 and HY zeolite affected the catalytic activity in lactic acid dehydration reaction, evidenced by characterization results. Among all the catalysts, the HY zeolite with Si/Al molar ratios of 100 and modified with potassium at 6 wt.% represented the best catalyst for lactic acid dehydration with 100% conversion and 45.5% selectivity for acrylic acid as well as the lowest acetaldehyde selectivity due to the suitability of total acidity and basicity of the catalyst. However, the catalyst with too high Al2O3 content caused the structural collapse, high strong acid sites and high coke deposition resulting in the lowest catalytic performance. The catalytic results indicated that potassium modification of HY zeolite could improve acrylic acid selectivity and reduce acetaldehyde selectivity.
DEGRADATION OF DIURON VIA ELECTROCHEMICAL ADVANCED OXIDATION PROCESS
Authors:   , Prapakornrattana Panchika
Published: November 2023

Diuron is one of common herbicides used in Thailand. Due to its persistence and its potent toxicity, diuron contamination becomes a very serious environmental problem. This research focuses on degradation of diuron via electrochemical advanced oxidation process (EAOP), in which reactive hydroxyl radicals are produced when electrical current is supplied to electrodes immersed in the solution. The influence of mixing speed, type of electrolyte, applied electric current, initial pH, type of electrode, and temperature were investigated. The results showed that up to 95% of diuron could be degraded within 6 hours of the reaction. The reaction generally follows the pseudo-first-order kinetic. The diuron degradation increased with increasing applied electric current, also increasing temperature, or decreasing pH of the solution. Moreover, type of anion affects the diuron degradation.
PERFORMANCE OF CNT MODIFIED BY NI WITH RU AS PROMOTER IN HYDROTHERMAL GASIFICATION OF GLUCOSE
Authors:   , Changkiendee Poomkawee
Published: November 2023

Supercritical water gasification (SCWG) is a promising way to produce energy from biomass in term of gaseous product. In this study, glucose was gasified in supercritical water in a batch reactor at temperature of 400 °C and pressure of 25 MPa. Nickel supported-single walled carbon nanotube (Ni/SWCNT), Ni/SWCNT promoted with ruthenium (Ru-Ni/SWCNT), and single walled carbon nanotube (SWCNT) were employed to study the effect of each catalyst on gasification product. Concentration of glucose was 5 wt%. Ratio of catalyst to glucose was 3:10 by weight. Reaction time was varied from 15 to 60 min. Energy dispersive X-ray spectroscopy (EDX), Brunauer–Emmett–Teller (BET) analysis, and X-ray diffraction (XRD) were used to confirm the catalyst synthesis achievement. After SCWG, gaseous, liquid, and solid (char) products were observed. Ni/SWCNT and Ru-Ni/SWCNT highly increased gas yield when compared to the conditions of SWCNT and non-catalytic gasification. However, hydrogen yield slightly increased with SWCNT. Methane production was also enhanced by adding metal catalysts, which was attributed that water-gas shift reaction and methanation play an important roles in gaseous phase reaction. Interestingly, it was found that an important period of reaction took place in the first 15 min. At this stage, glucose rapidly decomposed into several intermediates including furfural, 5-(hydroxymethyl)furfural, and other liquid products. However, char was rapidly produced with consumption of furfural and 5-(hydroxymethyl)furfural, resulting in a decrease in hydrogen and methane yield with a longer reaction time.
Conversion of cellulose to levulinic acid and lactic acid in hot compressed water
Authors:   , Wattanapaphawong Panya
Published: November 2023

In this research, I studied cellulose conversion into levulinic acid and lactic acid. Cellulose in biomass is considered as a renewable carbon source because of decreasing of fossil fuel in the world. I studied the effect of hot compressed water with carbon dioxide process on cellulose conversion into levulinic acid and I also studied the effect of metal oxides as a catalyst on cellulose conversion into lactic acid. Moreover, the optimum condition, amount of catalyst, the type of catalyst, and reusability of catalyst were investigated. The results are divided as three parts. First part, I reported that the use of hot compressed water with carbon dioxide could be directly converted cellulose to levulinic acid and that the yield of levulinic acid slightly differed when carbon dioxide is added into reaction. Thus, I concluded that the use of hot compressed water with carbon dioxide was not enough for cellulose conversion into levulinic acid. Second part, I studied the effect of metal oxides on cellulose conversion into lactic acid. The result showed that ZrO2 gave the high yield of lactic acid. I obtained 21.2% yield of lactic acid by using ZrO2 as a catalyst. The optimum condition for cellulose conversion was reaction temperature 473 K, reaction time 6 h. Many ZrO2 was characterized to understand correlation between the yield of lactic acid and properties of catalyst. I found that the amount of acid site and base site of catalyst played an important role for cellulose conversion into lactic acid. The result of reusability of catalyst showed that the yield of lactic acid slightly decreased after the first reaction.  Third part, I studied the effect of mixed metal oxides on cellulose conversion into lactic acid. Various mixed metal oxide were used in reaction. The results showed that 10%ZrO2-Al2O3 gave the 25.3 % yield of lactic acid.
Synthesis of glutathione-/lipoic acid-porphyrin compounds as novel biocompatible antioxidants
Authors:   , Thitimon Apiratt
Published: November 2023

A novel water-soluble porphyrin derivative bearing lipoic acid and manganese complex of this compound were successfully synthesized based primarily on the amidation reaction. The desired products, P-4Lp and Mn-P-4Lp, were achieved in the overall yields of 5% and 4% respectively from commercially available starting material. All new compounds were characterized by NMR spectroscopy and mass spectrometry.  Their optical properties were also investigated by UV-visible and fluorescence spectrophotometry. According to cell cytotoxicity test, IC50 of P-4Lp and Mn-P-4Lp were found in the range of 50 to 100 mg/L and more than 150 mg/L against HaCaT and HDFa cells, respectively. Thus, both products were considered to be low cytotoxicity compounds. However, based on the antioxidant activity test, no antioxidizing activity of these compounds in both kinds of cells was observed. In addition, mitochondria targeting evaluation suggested that the target porphyrin derivatives exhibited accumulation specifically in the mitochondria of the HaCaT cells.
Phát triển và điều khiển ổn định hệ thống con lắc ngược quay với động cơ ba pha
Authors: Minh Đạt Lương  , Nguyễn Như Sương  , Doãn Đức Minh  , Trương Quốc Tín  , Lý Thành Trung  , Nguyễn Hữu Thiên Thông  , Ngô Ngọc Thắng  , Đoàn Minh Thái  , Trịnh Hải Triều  , Phan Quốc Đạt
Published: November 2023

Hệ thống con lắc ngược quay (Rotary Inverted Pendulum System - RIPS) là một hệ cánh tay robot thiếu dẫn động (underactuated system) quen thuộc, có cấu trúc cơ khí đơn giản, và được ứng dụng để kiểm nghiệm, đánh giá các giải thuật điều khiển trong lĩnh vực kỹ thuật điều khiển. Hầu hết các nghiên cứu trước đây đều thiết kế và điều khiển ổn định hệ RIPS với động cơ DC servo. Tuy nhiên, trong nghiên cứu này, tác giả xây dựng hệ thống RIPS với động cơ ba pha và điều khiển ổn định hệ thống bằng bộ điều khiển (BĐK) kết hợp giữa LQR, BĐK trượt (Sliding Mode Control - SMC) và bộ quan sát trượt (Sliding Mode Observer - SMO). Nghiên cứu này được thực hiện bằng phần mềm Matlab/Simulink. Kết quả mô phỏng được trình bày chi tiết trong bài báo này để minh chứng khả năng điều khiển được khi sử dụng động cơ ba pha cho hệ thống RIPS.
SENTIMENT AND INDIVIDUAL STOCK PERFORMANCE: EVIDENCE FROM CHINA
Authors: Bai Min , Qin Yafeng
Published: November 2023

This paper investigates the effect of investor investment sentiment on individual stock returns in China. We find that investment sentiment is positively associated with stock performance contemporaneously. The Granger Causality test shows that investor sentiment is a driving force of stock price movement but not the other way around. Our constructed VAR model further suggests that the change in investor sentiment in the lagged period does not significantly affect the current stock return. In addition, both the Impulse Response and the Variance Decomposition analysis provide evidence that the stock price will increase right after a positive sentiment shock, and then follow a price drop until an intrinsic value comes up. Overall, the investor sentiment factor has a strong explanatory power to explain the variation in stock return.
WHEN THE GOING GETS TOUGH: NARRATIVES OF TRADITIONAL BUSINESS SURVIVAL THROUGHOUT CRISIS
Authors: Bayaua Xeline Mae
Published: November 2023

The COVID-19 Pandemic has resulted in severe difficulties, especially for those who are traditional business owners. Thus, there are different challenges that business owners have experienced. This study was designed to identify the coping mechanisms of traditional business owners when a pandemic hit them. The participants in this study were ten selected traditional business owners from Santiago City. The researchers used a narratology design that focuses on the life of a person to obtain a precise and correct response. In addition, the researchers used an open-ended interview method through an interview guide. The study found that the traditional business owners experienced business closures, the emergence of online selling, a downtrend in sales, heightened business compliance to safety protocols, financial difficulties and emphasizing products and services, strengthening customer relationships and loyalty, adapting personalized public health measures, aligning the traditional business to innovative business trends and promotion through virtual channels are their ways to cope up and keep their business afloat amidst COVID-19 Pandemic.
TIME SERIES ANALYSIS OF GLOBAL PRICES OF COFFEE: INSIGHTS INTO A COMPLEX MARKET
Authors: Erasmus Kabu Aduteye  , Tseganesh Tegegne Sete  , Yeong Nain Chi
Published: November 2023

The global coffee market is a complex and dynamic system influenced by a multitude of factors, resulting in continuous fluctuations in coffee prices. This study utilized time series analysis to examine the historical trends and dynamics of the monthly global price of coffee, Arabica, from January 1990 to July 2023. The data were transformed to achieve stationarity using a methodical process, and an ARIMA (0,1,2) model was found to be the best-fit model for forecasting. The analysis' findings show how complex the coffee market is. Coffee prices are influenced by factors like supply and demand, climate change, currency exchange rates, economic conditions, and trade policies. Since 2001, unstable markets have affected producers and consumers. The COVID-19 pandemic brought unprecedented challenges to the coffee sector, disrupting consumption patterns and supply chains. Economic variables like GDP growth and exchange rates influence coffee prices and producer welfare. While the coffee industry is experiencing recovery, price fluctuations remain a concern. Understanding these factors is crucial for stakeholders, and time series analysis can help inform decision-making in this dynamic market.
Selection of Cordia trichotoma Vell. clones for adventitious rooting and determination of the plantlet quality produced by mini-cuttings
Authors: Avinio Renata Smith , Malheiros Angélica Costa , Gazzana Denise , Lencina Kelen Haygert , Tonetto Thaíse da Silva , Bisognin Dilson Antônio
Published: November 2023

This study aimed to evaluate and define strategies for the selection of C. trichotoma clones with competence for adventitious rooting and production of high-quality plantlets by mini-cuttings. For adventitious rooting, mini-cuttings were treated with 3,000 mg L-1 of indole butyric acid and grown in 110 cm³ tubes, consisting of equal proportions of the commercial substrate and vermiculite. The percentage of rooting, number of roots, and mini-cuttings rooted per mini-stump were evaluated after 30 days of cultivation in a humid chamber. The rooted mini-cuttings were transferred to a shade house and the survival percentage, stem diameter, height, and number of leaves were evaluated at 120 days. Data were analyzed using the restricted maximum likelihood/best linear unbiased prediction (REML/BLUP) method and Pearson´s correlation analysis. The number of rooted mini-cuttings and stem diameter presented the highest repeatability and accuracy values for rooting and plantlet growth, respectively. These traits also presented significant positive correlation estimations with others, indicating the possibility of indirect selection gain. Cordia trichotoma clones can be selected for vegetative propagation, considering the number of rooted mini-cuttings and the stem diameter of the plantlets produced by mini-cutting. Early selection for adventitious rooting and plantlet quality can aid in genetic improvement programs for the development of new cultivars for vegetative propagation via the use of mini-cuttings.
A new characterization of simple K3-groups using same-order type
Authors: Lima Igor dos Santos , Pereira Josyane dos Santos
Published: November 2023

Let G be a group, define an equivalence relation ∼ as below:
∀ g, h ∈ G, g ∼ h ⇐⇒|g| = |h|
the set of sizes of equivalence classes with respect to this relation is called the same-order type of G and denoted by α(G). And G is said a αn-group if |α(G)| = n. Let π(G) be the set of prime divisors of the order of G. A simple group of G is called a simple Kn-group if |π(G)| = n. We give a new characterization of simple K3-groups using same-order type. Indeed we prove that a nonabelian simple group G has same-order type {r, m, n, k, l} if and only if G ≅ PSL(2,q), with q = 7, 8 or 9. This result generalizes the main results in (4), (6) and (8). Moreover based on the main result in (8) we have the natural question: Let S be a nonabelian simple αn-group and G a αn-group such that |S| = |G|. Then S ≅ G. In this paper with a counterexample we give a negative answer to this question.
Qualidade da água do rio Urupá relacionada ao uso e cobertura da terra, região central de Rondônia, Brasil
Authors: Pereira Edilene da Silva , Silva Nairo Rafael da , Webler Alberto Dresch , Hurtado Fernanda Bay
Published: November 2023

O estado de Rondônia passou por transformações que impulsionaram o crescimento das atividades agropecuárias e industriais, bem como das cidades. Porém, a falta de planos de gestão compatíveis com o atual contexto de produção e a baixa cobertura de saneamento colocam em risco os recursos naturais existentes nelas, frente à ausência de planejamento. Nesse contexto, objetivou-se avaliar a qualidade da água do rio Urupá e a relação com o uso e cobertura da terra em sua bacia. Para tanto, no período de maio/2018 a abril/2019, realizou-se coletas bimestrais em 10 pontos amostrais no rio Urupá, da nascente à foz nos municípios de Mirante da Serra, Urupá e Ji-Paraná, com análises dos parâmetros físico-químicos, microbiológicos e a determinação do IQA nos períodos de seca (maio a outubro), chuvas (novembro a abril), assim como a avaliação do uso e cobertura da terra através de ferramentas de geoprocessamento. Ao longo do perfil longitudinal do rio, durante todo o estudo, predominou IQA de classe regular, com contraste na seca para as classes ruim e boa, no P5 e P10, respectivamente. A má qualidade da água entre os pontos P4 ao P5 no período de seca, revela que a deterioração da água se dá por fontes de poluição pontual, pela presença de resíduos e/ou efluentes oriundos de atividades inerentes à zona urbana, agroindústrias existentes na área de drenagem, aliados à suscetibilidade do solo. Os resultados chamam atenção para a necessidade de adoção de medidas de ordenamento das atividades compatíveis à capacidade suporte da bacia.
A systematic review of hardware technologies for small-scale self-driving cars
Authors: Caleffi Felipe , Rodrigues Lauren da Silva , Stamboroski Joice da Silva , Rorig Braian Vargas , Santos Maria Manoela Cardoso dos , Zuchetto Vanessa , Raguzzoni Ítalo Brum
Published: November 2023

Autonomous vehicle (AV) technology has the potential to revolutionize the transportation and logistics industry, making it more efficient and safer. However, testing such technologies is often limited by time, space, and cost constraints. Therefore, in recent years, several initiatives have emerged to test autonomous software and hardware on scaled vehicles. In order to provide guidance for future research, this systematic literature review was conducted to provide an overview of the literature surrounding small-scale self-driving cars, summarizing the current autonomous platforms deployed and focusing on the hardware developments in this field. Through the use of databases such as Web of Science, Scopus, Springer Link, Wiley, ACM Digital Library, and the TRID, 38 eligible studies that present small-scale testing of self-driving cars were identified and reviewed. The results indicated that publications on the topic are relatively new, with only the last four years showing an increase in the number of publications. Additionally, most papers only presented preliminary results, highlighting the potential for further research and development in the field. Research papers predominantly focused on software rather than hardware.
Evolução do SofEMN: prototipação de um módulo para o ensino de métodos numéricos
Authors: Loreto Aline Brum , Andrade Arthur Cordeiro , Soubhia Ana Luisa , Spolaor Amanda , Menezes Guilherme de Lima , Dias Bruna de Abreu , Finger Alice Fonseca
Published: November 2023

Estratégias de ensino e aprendizagem que motivem os alunos são essenciais em sala de aula, principalmente com conteúdos matemáticos. O Software de Apoio ao Ensino de Métodos Numéricos, SofEMN, foi desenvolvido com o objetivo de auxiliar no aprendizado de Métodos Numéricos. Na primeira versão, a usabilidade, a facilidade de uso, a interface e a pretensão de uso foram avaliadas pelos alunos, e melhorias foram inseridas.  Este trabalho apresenta o protótipo para a terceira versão do SofEMN, que foi projetado a partir de requisitos funcionais elencados para a criação de um módulo de ensino, contendo explicação e exemplos dos conteúdos, além de atividades para avaliar o aprendizado. Assim, é possível que o aluno aprenda o conteúdo e verifique os resultados na mesma ferramenta.
Design of a hydraulic ram pump for irrigation of the UFSM campus in Cachoeira do Sul
Authors: Almeida Mathias Verdum de , Lunkes Arthur Sandri , Souza Maximiliano Silveira de , Rech Charles , Maidana Cristiano Frandalozo , Venturini Simone Ferigolo
Published: November 2023

With the development of the Federal University of Santa Maria (UFSM) campus in the city of Cachoeira do Sul-RS, plans of arborization and landscaping were made, and the need of a constant and reliable water supply for irrigation appeared. Therefore, the hydraulic ram pump was selected to deliver water from the pond, present in the grounds of the campus, to a storage tank for the irrigation system. In this context, this paper addresses a review of studies about the design and manufacture of hydraulic ram pumps and, subsequently, presents the basic design and the fabrication steps of a PVC hydraulic ram pump that is capable of feeding the irrigation system.
Robótica como ferramenta interdisciplinar na física
Authors: Carvalho Cleiton Anderson Trindade de , Moraes Barbara Garcia de Paiva , Teixeira Marianna Batista , Maldaner Silvana , Boita Jocenir , Fabris Lucinéia , Maran Vinicius , Quadros Glauber Rodrigues de
Published: November 2023

A robótica educacional como recurso pedagógico ainda é uma ferramenta de alto custo, por isso restrito a poucos estudantes. Estudos mostram que a robótica como ferramenta educacional proporciona aos estudantes relacionar conhecimentos de diferentes áreas, possibilitando o aprendizado de forma dinâmica. Assim, como uma solução de baixo custo, propõe-se desenvolver um pequeno protótipo de robô.  O protótipo movimenta-se livremente com dois motores e, ao chocar-se com algum obstáculo, ele altera sua direção imediatamente. Sua construção é realizada com o uso de dois minimotores CC 1,5V, duas chaves microinterruptor, um suporte de pilhas, um pedaço de chapa galvanizada, um pequeno interruptor e clips de papel. O princípio de movimento do robô baseia-se no liga/desliga dos interruptores, os quais controlam os motores. Nas colisões com objetos, esse é o mecanismo que lhe garante as mudanças de direção e sentido. Vetores, circuitos e corrente elétrica são alguns dos possíveis estudos através deste projeto. O ensino do circuito envolvido no protótipo e a sua montagem podem transformar as aulas de física, e de ciências de modo geral, em algo mais atrativo ao estudante e promover a aprendizagem significativa de conteúdos de áreas exatas.
Atividade experimental de física empregando um disco de Euler
Authors: Moraes Barbara Garcia De Paiva , Carvalho Cleiton Anderson Trindade de , Teixeira Marianna Batista , Maldaner Silvana , Boita Jocenir , Fabris Lucinéia , Quadros Glauber Rodrigues de
Published: November 2023

Neste trabalho propõe-se a construção de um disco de Euler para o ensino de física. A ideia é analisar o movimento de uma moeda girando sobre uma mesa e comparar com o movimento do disco de Euler. O disco em questão foi construído a partir de três discos rígidos (HD) e um ímã de alto-falante. Coloca-se o disco para girar e analisa-se a energia cinética e potencial associada. Para analisar a influência do atrito no movimento, coloca-se o disco para girar em diferentes superfícies e mede-se o tempo até o disco atingir o repouso.  Em resumo, o disco de Euler é um aparato que permite o estudo do movimento, da energia cinética, da energia potencial gravitacional, de processos de transformação de energia além da influência das forças de atrito no movimento dos corpos. A física do movimento, de uma forma simples e prática, pode ser estudada através deste aparato experimental, garantindo um aprendizado efetivo.
Incidência de lesões por pressão relacionadas a dispositivos médicos em unidade de terapia intensiva adulto
Authors: Reisdorfer Nara , Nascimento Eliane Regina Pereira do , Lazzari Daniele Delacanal , Echevarría-Guanilo Maria Elena , Galetto Sabrina Guterres da Silva , Malfussi Luciana Bihain Hagemann de
Published: November 2023

Objetivo: determinar a incidência de lesões por pressão relacionadas a dispositivos médicos e os fatores associados em unidade de terapia intensiva adulta. Método: quantitativo, observacional, prospectivo. Os dados foram coletados entre setembro e novembro de 2020, em um hospital público. Utilizou-se instrumento para avaliações diárias da pele sob e peri os dispositivos. Resultados: foram analisados 1.579 dispositivos em 292 avaliações, em 47 pacientes. Identificando-se 233 lesões (14,9%). A incidência de lesões foi de 6,1%. Em 20,9% (n= 61) dos dispositivos utilizados, as lesões foram relacionadas ao tubo orotraqueal. Com relação às regiões acometidas por lesões, 10,4% (n= 24) ocorreram nas orelhas; 7,8% (n= 18), na face. As lesões estágio 1 foram as mais frequentes (n=147; 63,3%) nas avaliações realizadas. Conclusão: observou-se incidência de 6,1%. Ressalta-se a necessidade de manter a vigilância, em especial em pacientes com tubo endotraqueal. Medidas de prevenção devem ser adotadas para diminuir a ocorrência destas lesões.
Laserterapia e tratamento medicamentoso tópico na onicomicose em pessoas com diabetes: série de casos
Authors: Júnior Eugenio Fuentes Pérez , Paula Cléo Macedo , Pires Ariane da Silva , Nunes Alessandra Sant’Anna , Gonçalves Francisco Gleidson de Azevedo , Tavares Kelly Fernanda Assis
Published: November 2023

Objetivo: descrever os efeitos da laserterapia de baixa intensidade e do tratamento medicamentoso tópico da onicomicose em pessoas com diabetes. Método: estudo quantitativo, do tipo série de casos. Os participantes foram 21 pessoas com diabetes divididas em dois grupos, sendo o primeiro tratado com laser e o segundo com medicamento tópico no período de outubro de 2020 a agosto de 2021. Os dados foram coletados em histórico e exame clínico das lâminas ungueais e organizados em banco de dados, cuja análise ocorreu por meio de estatística descritiva. Resultados: identificou-se que no grupo I 30% das lâminas ungueais obtiveram cura clínica e no II 26%. Ao avaliar a resposta satisfatória o grupo I apresentou 63% e o II 53%. Conclusão: o tratamento da onicomicose com laserterapia apresentou maior prevalência de resposta satisfatória e cura clínica do que o tratamento medicamento tópico.
Álbum seriado para enfermeiros sobre prevenção de infecção de cateter venoso central em crianças
Authors: Vettori Thalita Neiva Breda , Paiva Eny Dórea , Silva Rita de Cássia , Rodrigues Elisa da Conceição , Silva Liliane Faria , Aguiar Rosane Cordeiro Burla
Published: November 2023

Objetivo: construir um álbum seriado para enfermeiros sobre prevenção de infecção de cateter venoso central totalmente implantado (CVC-TI) em crianças onco-hematológicas. Método: estudo metodológico, realizado em duas etapas: revisão integrativa de literatura e produção do álbum seriado. Resultados: o álbum seriado contém fichas roteiros e figuras ilustrativas voltados para o profissional como forma de orientação e fácil acessibilidade, no momento do cuidado ao CVC-TI na criança onco-hematológica, apresentando 6 ilustrações, juntamente com a capa. Conclusão: acredita-se que o produto em questão se constitui como uma ferramenta importante que possibilita o aprendizado para os enfermeiros, contribuindo assim, para qualidade da assistência.
Cuidado domiciliar pós alta do prematuro durante a pandemia Covid-19
Authors: Martinelli Eduarda de Castro , Silva Aline Dahmer da , Machineski Gicele Galvan , Reis Alessandra Crystian Engles , Viera Cláudia Silveira
Published: November 2023

Objetivo: entender como mães vivenciaram o cuidado com seus filhos prematuros em casa em meio à pandemia da COVID-19. Método: estudo qualitativo, descritivo, desenvolvido entre janeiro e dezembro de 2021, mediante entrevistas remotas com 25 mães de prematuros, após um mês da alta hospitalar, com Análise de Conteúdo temática. Resultados: desvelaram-se preocupações maternas referentes ao cuidado com o filho na pandemia, além de influências do período pandêmico na rotina familiar; acompanhamento do seguimento das crianças nos serviços de saúde descontinuado; sobrecarga e medo. Esses aspectos podem expor o bebê a maior risco de alterações do seu desenvolvimento, bem como afetar a autoeficácia materna, uma vez que o receio das complicações decorrentes do nascimento pré-termo associou-se à angústia de possível contaminação pelo coronavírus. Conclusão:  a prematuridade vivenciada em meio à pandemia COVID-19 repercutiu negativamente tanto no cotidiano da vida familiar como no acompanhamento de saúde do prematuro.
Estudo bibliométrico sobre a prática pedagógica na formação do enfermeiro no contexto do MERCOSUL
Authors: Souza Elaine Regina Corrêa de , Ferreira Ilma Pastana , Carvalho George Pinheiro
Published: November 2023

Objetivo: analisar a produção científica sobre a prática pedagógica na formação do Enfermeiro no contexto do MERCOSUL indexada na Web of Science. Método: estudo descritivo, abordagem quantitativa, com análise bibliométrica dos indicadores: número de publicações por ano, idioma, periódicos, autores mais produtivos, coautoria e palavras-chave. A coleta de dados ocorreu em 29 de junho de 2022, análise mediante o Software Microsoft Excel®. Resultados: foram identificados 389 documentos, distribuídos entre: 354 artigos (91%), 19 artigos de revisão (4,9%) e 16 conferências (4,1%), publicados em 126 periódicos diferentes, nos idiomas: inglês, português e espanhol, entre os anos de 1958 a 2021. O periódico com maior quantitativo de publicações foi a Revista Latino-Americana de Enfermagem. Os 10 autores mais produtivos são do Brasil. Na análise de termos, destacaram-se as palavras “Nursing”, “Nursing Education” e “Education”. Conclusão: expressiva produtividade brasileira e escassa produção dos demais países do MERCOSUL indexada na Web of Science.
Felicidade no trabalho e interação familiar em enfermeiros: estudo transversal
Authors: Loureiro Sofia Alexandra Ribeiro , Loureiro Helena Maria Almeida Macedo , Trindade Letícia de Lima , Borges Elisabete Maria Neves
Published: November 2023

Objective: to analyze the association among happiness at work, family interaction and sociodemographic/professional variables in nurses in the hospital context. Methods: cross-sectional study with a convenience sample of 363 nurses. Questionnaires for sociodemographic/professional characterization, Shorted Happiness at Work Scale and Survey Work-Home Interaction Nijmegen were applied. In data analysis and processing, descriptive and inferential statistics were used. Results: moderate levels of happiness at work (4.44±1.15) and moderate to low levels of family interaction (1.02±0.31) were observed. Marital status, leisure activities, place of work, length of professional experience, professional category, working hours and perception of stressful work were associated with happiness at work. Age, gender, children, dependents, leisure activities, length of professional experience, working hours and perception of stressful work were associated with family interaction. Conclusion: nurses showed moderate levels of happiness at work and moderate to low levels of family interaction, associated with specific sociodemographic and professional variables.
Promoção da saúde do adolescente: modelo de Nola Pender por meio de oficinas virtuais participativas
Authors: Santi Daniela Bulcão , Baldissera Vanessa Denardi Antoniassi
Published: November 2023

Objetivo: discutir o percurso cuidativo-educativo dialógico do Modelo de Promoção da Saúde de Nola Pender por meio de oficinas virtuais participativas com adolescentes. Método: pesquisa participativa, com abordagem da pesquisa-ação, efetuada em uma unidade da Rede Federal de Educação Profissional e Tecnológica na região Centro-Oeste. Realizaram-se sete oficinas com 15 adolescentes e com análise interpretativa. Resultados: a temática das oficinas abordou os componentes do Modelo de Promoção da Saúde: Características e experiências individuais; Sentimentos e conhecimentos sobre o comportamento que se quer alcançar; e Comportamento de promoção da saúde desejável. O conteúdo produzido foi elaborado no diagrama do próprio Modelo. Conclusão: o caráter dialógico da pesquisa participativa validou as oficinas como tecnologias cuidativo-educacionais, as quais apoiaram a prática do enfermeiro na conscientização e no empoderamento para atender às especificidades dessa população e propiciaram reflexões, mudanças nos comportamentos de saúde e autonomia do adolescente.