bluuebunny/crossref_metadata_2025 huggingface dataset:
Machining Character Analysis of Coated and Uncoated End Mill on Heat Treated C45 Steel
Authors: Sivaprakash E , Aswin S , Dhanaruban D , Dinesh G , Inbamathi M
Published: April 2022

Abstract: Machining operations are used to produce shapes or surface characteristics for a product. Some common conventional machining operations are turning, boring, drilling, reaming, milling, and tapping. Conditions for machining operations were chosen based on geometry and surface finish requirements rather than profit when costs were comparatively low on labor, resource, machines, and tools. However, nowadays, many researchers proposed optimizing machining parameters to maximize profit when using expensive modern machine tools. The purpose of machining operations is to make specific shapes or surface characteristics for a product. Conditions for machining operations were traditionally selected based on geometry and surface finish requirements. This study was investigated the parameter optimization of end milling operation various parameter and coated tools and ordinary tool with heat treated C45 steel with single objective function criteria based on the Taguchi orthogonal array with the Taguchi design. Comparison of coated and uncoated end mill process of heat-treated C-45 steel fine Ra is obtained with coated tool. Kerf width almost equal of both tools it did not show any major difference Optimum level and ANOVA were calculated for both tools. Keywords: Ra, PVD coated, Heat treatment, End mill
Development of Geopolymer Brick Using Fly Ash
Authors: Kandoria Vikrant Singh , Tank Ishan , Goyal Dr. Amit , . Khushwant , Kaur Loveleen
Published: April 2022

Abstract: This research looked on the use of geopolymer brick in the construction industry. The need for bricks is rising rapidly. For example, all brick kilns rely on good quality clay from agricultural fields. Another issue facing the brick industry is the creation of high-temperature bricks, which necessitates fossil fuels. This method produces a lot of CO2 and uses a lot of fossil fuels. Due to the high energy consumption and lack of natural resources, geopolymer brick is a more sustainable and greener material. Geopolymer brick is made from waste materials such as fly ash, rice husk, and other similar materials that are high in alumina and silica content. A variety of activators, including sodium hydroxide and sodium silicate, are used to activate these materials. 10 N/mm2 is the compressive strength of the brick that we were able to attain through this research. Keywords: Ordinary Portland cement (OPC); Fly Ash (FA); compressive strength test
A Survey on Time Series Forecasting Approaches and Applications
Authors: Thakur Apoorva , Monga Sandeep
Published: April 2022

Abstract: This Time series forecasting (TSF) assists in making better strategic decisions under uncertain circumstances so that financial crisis can be avoided, wise investments can be made, under/over contracting of utility can be avoided, staffs can be scheduled appropriately, service providers can provide better service, mankind can get prepared for natural disasters and many more.However, the accuracy in forecasting plays a vital role and achieving such is a challenging task owing to the vagueness and nonlinearity associated with most of the real world time series. Therefore, improving the forecasting accuracy has become a keen area of interest among the forecasters from different domains of science and engineering. In this work a survey on time series forecasting approaches on various applications has been performed. Keywords: Time series forecasting, Regularization, Regression
Efficient Chatbot Designing
Authors: Kapuskar Vaibhavi , Bobade Sakshi , Diwan Srushti , Dholwade Akshata , Kamble Vaishnavi , Gudadhe Prof. S. R.
Published: April 2022

Abstract: A conversational agent (chatbot) is a piece of software that is able to communicate with humans using natural language. Modeling conversation is an important task in natural language processing and artificial intelligence (AI). Indeed, ever since the birth of AI, creating a good chatbot remains one of the field’s hardest challenges. While chatbots can be used for various tasks, in general they have to understand users’ utterances and provide responses that are relevant to the problem at hand. In the past, methods for constructing chatbot architectures have relied on hand-written rules and templates or simple statistical methods. With the rise of deep learning these models were quickly replaced by end-to-end trainable neural networks around 2015. More specifically, the recurrent encoder-decoder model [Cho et al., 2014] dominates the task of conversational modeling. This architecture was adapted from the neural machine translation domain, where it performs extremely well. Since then a multitude of variations and features were presented that augment the quality of the conversation that chatbots are capable of the next section of my paper focuses on adapting the very recent Tranformer [Vaswani et al., 2017] model to the chatbot domain, which is currently the state-of-the-art in neural machine translation. I first present my experiments with the vanilla model, using conversations extracted from the Cornell Movie-Dialog Corpus [Danescu-Niculescu-Mizil and Lee, 2011]. Secondly, I augment the model with some of my ideas regarding the issues of encoder-decoder architectures. More specifically, I feed additional features into the model like mood or persona together with the raw conversation data. Finally, I conduct a detailed analysis of how the vanilla model performs on conversational data by comparing it to previous chatbot models and how the additional features, affect the quality of the generated responses
THE EFFECTIVENESS OF GUTINMATHE'S IN BLOG-BASED LEARNING WITH A CONTEXTUAL APPROACH ON LINEAR EQUATION SYSTEM
Authors: Inganah Siti , Mahmulah Lilik , Slamet Kusumawardana Adi
Published: April 2022

This study aimed to determine how effective the learning is using Gutinmathe's blog with a contextual approach. This research employed a quantitative approach and ADDIE Web development method, with analysis, design, development, implementation, and evaluation stages. The population in this study were Year 10 students of one of the vocational high School in Pandaan, Indonesia and the samples were Year 10 students majoring in Medical Laboratory Technology from the school. The data was analyzed using the paired-sample t-test conducted by SPSS. Gutinmathe's blog learning media was validated by two media expert lecturers and one teacher. The media validation score was 78.33%, meaning that the blog media is feasible to use. The results of this study indicate differences in learning outcomes before and after using the Gutinmathe blog-based learning media, where the students' post-test answers are better than the pre-test. It shows that using Gutinmathe's blog-based learning media with a contextual approach is effective.
Transición a un nuevo plan ¿Qué opinan los estudiantes del desempeño docente?
Authors: Morales-Blanco Mozart Marlone , Hickman-Rodríguez Hortensia , Cepeda-Islas María Luisa , Alarcón-Armendáriz Martha Elba , Bautista-Díaz María Leticia
Published: April 2022

Este trabajo tuvo como objetivo evaluar la opinión del estudiantado respecto a la práctica docente en los dos currículos (1976 y 2015), en el momento en que ambos planes estaban vigentes. La evaluación del desempeño nos permitió evaluar el impacto del proceso de transición del más reciente plan de estudios. A través de un muestreo no probabilístico de tipo intencional, se aplicó el Cuestionario de Opinión de Estudiantes Sobre la Práctica Docente (COPDE) en su versión digital en tres periodos escolares -2018-1; 2018-2 y, 2019-2-. Se llevó a cabo una ANOVA factorial cuyos resultados indican efectos de interacción significativos entre el plan y la aplicación de 2018-1 y 2018-2 (Sig. = 0,004) y entre el plan y la aplicación de 2018-1 y 2019 (Sig. = 0,001). Los hallazgos obtenidos en este estudio destacan el impacto de la puesta en marcha del plan de 2015 en el desempeño docente del profesorado. Las tensiones de ese momento se concentraron en las opiniones favorables hacia aquellos profesores que imparten asignaturas del plan de 1976. Los análisis de interacción indican que el efecto del plan y aplicación en la opinión sobre el desempeño se acorta a medida que se va instaurando el currículo en la institución; siempre con una tendencia favorable hacia el plan primigenio. En forma paralela la variable formación docente es sustantiva y determinante en la opinión de los estudiantes.
Platinar jogos
Authors: Reitano Leonardo
Published: April 2022

Este artigo, a partir de dois modelos teóricos – a psicologia do Flow, de Mihaly Csikszentmihalyi, e o da semiótica tensiva de Claude Zilberberg – busca analisar os valores e o projeto enunciativo da atividade do platinar – completar todos os desafios propostos pela equipe desenvolvedora de um jogo. Em seguida procura compreender como a busca por tal estratégia, de forte cunho psicopolítico, interfere no projeto enunciativo do jogo em si, diminuindo o impacto e prejudicando o flow de tal proposta narrativa em nome de recompensas que se encontram fora do jogo, no espaço dos valores neoliberais do mundo digital.
O deserto do ideal
Authors: Mussa Ivan
Published: April 2022

Esta resenha aborda o livro A precarious game: The illusion of dream jobs in the video game industry, de autoria de Ergin Bulut, lançado apenas em inglês em 2020. Trata-se de um estudo sobre o funcionamento da indústria de games, a partir da imersão etnográfica em uma empresa estadunidense, à qual Bulut dá o pseudônimo de Desire. O autor examina as formas de trabalho que sustentam a empresa, que inicia sua trajetória no mercado independente, mas logo é adquirida por uma distribuidora maior. O alcance da análise se prolonga para além das paredes de Desire: reverbera nos ambientes domésticos dos trabalhadores e na desigualdade de gênero; na necessidade de outsourcing de trabalho precário para países do Sul-Global e na perpetuação dos valores de “diversão” e “escapismo” baseados na tecnomasculinidade branca e no individualismo competitivo neoliberal.
Propondo princípios orientadores à produção decolonial de videogames diversos
Authors: Stateri Julia , Souza Jaderson
Published: April 2022

Com o objetivo de propor princípios orientadores à futura criação de uma metodologia decolonial para a produção de videogames diversos, no presente artigo se apresenta um olhar rápido sobre o cenário desenvolvedor independente brasileiro, refletindo criticamente quanto à respectiva postura que foge dos paradigmas impostos pela indústria de massa. Partindo da fundamentação com base em autores críticos do campo de jogos, bem como do pensamento decolonial, foi feita uma análise descritiva de projetos que podem se caracterizar na definição proposta de videogames diversos para que, por fim, se pudesse propor os referidos princípios orientadores.
Jogador da iSaúde:
Authors: M. C. Hoff Tânia , Holtz Ana Catarina , L. Fraga Lucas
Published: April 2022

Neste artigo, abordamos a apropriação de estratégias de games pelo mercado da saúde, tendo como objetivo problematizar a gamificação como uma estratégia biopolítica. Nesta perspectiva, procuramos entender como as dinâmicas gamificadas mobilizam “convocações biopolíticas” (PRADO, 2013), que produzem subjetividades características de sujeitos neoliberais. Para tanto, utilizamos o website do Labi Exames como material empírico que exemplifica o uso de estratégias de gamificação no mercado da saúde. Quanto à fundamentação teórica, mobilizamos estudiosos da biopolítica, da biomedicalização, da “filosofia neoliberal” e da gamificação – por meio dos quais caracterizamos a “iSaúde” como um contexto marcado pelo deslocamento do poder-saber médico, pelo incentivo ao autodiagnóstico e pela preponderância dos discursos neoliberais no cuidado com o corpo.
Sonoridades e política das affordances na construção das identidades dos games
Authors: De Almeida Menini Thiago , Andrade Pereira Vinícius
Published: April 2022

O artigo aborda o uso das sonoridades nos jogos eletrônicos explorando o quanto afetam a identidade e as dinâmicas do jogo. Entendemos que tais afetações são coo-determinadas por expressões aurais que agem como tecnologias moduladoras de estados emocionais e cognitivos do jogador, e que favorecem estados mentais que singularizam a experiência imersiva. O objetivo é pensar, por fim, nos modos que a indústria dos games se beneficia dessas modulações cognitivas, emocionais e mentais. A aposta está no uso das sonoridades com uma política de affordances, que visa maximizar o tempo gasto pelo jogador dedicado ao jogo, contribuindo para o fortalecimento das práticas de um capitalismo de plataforma, atenção e vigilância dentro do universo dos games, reafirmando uma tendência presente na indústria do entretenimento contemporânea.
Quem não sonhou em ser um jogador de videogame?
Authors: Macedo Tarcízio , Kurtz Gabriela
Published: April 2022

Este artigo busca compreender o modo como imagens e imaginários coloniais viajam pelos jogos, a partir de ações publicitárias ao seu redor, e criam condições maduras para a proliferação do trabalho gratuito baseado em esperança. O tema é enquadrado a partir de preceitos teórico-epistemológicos que problematizam a relação entre trabalho e lazer nos videogames, fenômeno que é melhor compreendido pela lente da colonialidade. O olhar se debruça sobre as estratégias publicitárias da Operação Chrono no Brasil, do jogo Free Fire, juntamente com campanhas de grandes anunciantes nos esports e no futebol. Identifica-se o reforço da ideologia neoliberal e a valorização lucrativa das formas de lazer e esperança de jogadores aspirantes, por meio da reprodução de retóricas que reiteram a matriz colonial, a precariedade, a exploração e assimetrias de poder na indústria e no ecossistema de esports.
Os rituais do brincar midiatizado
Authors: Andrade Marcelo , Perez Clotilde
Published: April 2022

Percebe-se que as crianças se apropriam progressivamente dos aparatos digitais não apenas para se comunicar e socializar, mas também para brincar. A brincadeira enquanto prática cultural fortemente atrelada às infâncias se modela e, até mesmo, se ressignifica à medida que as possibilidades comunicacionais se alteram. Desse modo, o objetivo deste artigo é pensar sobre os atravessamentos decorrentes do atual contexto midiatizado, de modo a perceber a constituição de outros e, talvez, novos modos de brincar da criança conectada. Para isso, nos debruçamos sobre os rituais de consumo no intuito de compreender como tais ações ritualísticas contribuem para promover e reforçar a midiatização do brincar. Pensar nas brincadeiras das crianças youtubers como dispositivos midiáticos capazes de articular sentidos nos parece um caminho proveitoso para compreender o lugar da criança em suas dimensões midiatizadas, visto que tais práticas possuem a capacidade de promover bens de consumo, orientar e moldar gostos, bem como visões de mundo.
consumo de notícias por crianças durante a pandemia da Covid-19
Authors: Doretto Juliana , Cancoro Generali Clemente Sabrina
Published: April 2022

Este artigo apresenta dados de uma pesquisa quantitativa realizada com cerca de 150 leitores do jornal infantojuvenil brasileiro Joca, durante a pandemia da Covid-19, em 2020. Trata-se de um veículo destinado a crianças e adolescentes, dedicado à cobertura generalista de atualidades, e que passou a circular em versão digital mais amplamente na quarentena. O objetivo da pesquisa foi investigar o consumo de conteúdo jornalístico pelas crianças durante o isolamento social. Por meio do levantamento realizado, notou-se a importância da mediação do professor (mas não dos pais) para a leitura do jornal durante a quarentena, ainda que o consumo autônomo também ocorra em um terço dos casos. Além disso, quase 60% dos respondentes disseram que, na pandemia, veem ou escutam mais notícias (mesmo que não direcionadas a eles), para acompanhar o noticiário ou para saber mais sobre a doença.
Synthesis and Performance Evaluation of Cellulose-based Slow-release Fertilizer: A Review
Authors: Trirahayu Dhyna Analyes , Putra Ridwan P. , Hidayat Achmad Syarif , Perdana Muhammad Iqbal , Safitri Erwina
Published: April 2022

Cellulose-based materials are attractive candidates for the fabrication of sustainable and eco-friendly slow-release fertilizers. The ability of the cellulose structure to be modified and functionalized makes it promising as a scaffold backbone in the development of advanced agricultural materials. In this review, different synthesis techniques of cellulose-based slow-release fertilizers are discussed. Crucial parameters in the design of the slow-release fertilizers (i.e., slow-release behavior, water retention properties, and biodegradability) are presented. The applications of cellulose-based fertilizers in enhancing the growth of agricultural and horticultural commodities are provided. To date, solution polymerization is more widely employed in the preparation of cellulose-based slow-release fertilizers due to its low cost and simple operation, with no solvent recovery required. Esterification tends to be the most typical reaction during the synthesis of the fertilizers because of its high substrate solubility and more straightforward product purification. This review can be used as a reference to develop other efficient cellulose-based slow-release fertilizers that can be utilized to delay the release of fertilizers and prevent the overuse of fertilizers.
Sintesis Bioplastik Ramah Lingkungan Berbasis Pati Biji Durian dengan Filler Selulosa Sabut Kelapa
Authors: Nurwidiyani Ria , Ghufira  , Nesbah  , Deni Agus Triawan
Published: April 2022

Conventional plastic has become a concern because it is a problem for the environment. Bioplastics made from starch and natural polymers such as cellulose from coconut fiber can be a solution to these plastic problems. This study aims to synthesize and characterize bioplastics made from durian seed starch with sorbitol as a plasticizer and coconut coir cellulose as a filler. This research consisted of several stages of the procedure including the extraction of durian seed starch, isolation of coco coir cellulose, synthesis of bioplastics, and characterization of bioplastics. Bioplastics are made by the melt intercalation method. The resulting bioplastics were characterized by FTIR and mechanical tests (elastic modulus and tensile strength). In this study, the starch produced was characterized by a yellowish-white color and a rough texture with a yield of 10.95%. Before being used as a bioplastic filler, the coconut coir powder was bleached using H2O2 in a base condition to reduce the presence of lignin and hemicellulose. Based on the FTIR spectrum, the bleaching process was indicated by a decrease in the intensity of the absorption peak at wavenumbers of 1246 cm-1 and 1642 cm-1 which were characteristic absorptions for lignin and hemicellulose. The results of the mechanical test showed that the bioplastic composition with the highest tensile strength and modulus of elasticity was owned by bioplastic with 4% cellulose, namely 7.28 MPa and 0.73 MPa.
Verifikasi Metode Pengujian Kadar Nitrit dalam Air Limbah Secara Spektrofotometri UV-Visibel
Authors: Solihat Imas , Tirta Ardina Purnama , Ramdani Agung Pratama , Nandang Roziafanto Achmad
Published: April 2022

Wastewater is the residue from a business and or activity in the form of liquid. One of the chemical compounds that cause pollution is nitrite. The nitrite level in wastewater is a key parameter in determining water quality because of its toxicity. The standard method for nitrite analysis refers to SNI 06-6989.9-2004 using sulfanilic acid and N-(1-naphthyl)-ethylenediamine dihydrochloride (NED) reagents. Linearity, instrument detection limit (LDI) and quantification detection limit (LOQ), precision, accuracy, and calculation of measurement uncertainty estimation are some of the verification parameters that were tested. The regression curve's results showed that the correlation value (r) = 0.9998, the instrument detection limit value of 0.0014 mg/L, the quantitation limit value of 0.0035 mg/L, the precision value (%SBR) of 1.30 percent, the accuracy value is in the range (90-100)% and the relative uncertainty of 5.88 %. The verification results suggested that the UV-Visible spectrophotometer-based nitrite test technique in wastewater had passed the acceptance requirements and may be utilized for routine laboratory analysis.
Analisis Kandungan Merkuri (Hg) pada Badan Air, Sedimen dan Biota yang Terdampak Aktivitas Pertambangan Emas di Kabupaten Parigi Moutong
Authors: Rasul Ernawaty , Musafira Musafira
Published: April 2022

Parigi Moutong District is one of the regencies in Central Sulawesi province with the highest number of illegal mining activities. Unlicensed mining activities generally use mercury as an extracting agent and gold processing waste is generally disposed of in rivers or other water bodies. The purpose of this study was to analyze the levels of heavy metal mercury (Hg) in water bodies, sediments, and marine biota in gold mining areas in Parigi Moutong District. The sampling method was carried out by random sampling method, while the analysis of mercury content in samples of river water, sediment, and biota was carried out using atomic absorption spectroscopy (AAS). From the results of the study, it was found that mercury levels in water and sediment samples were still below the quality standard value which were 0.001 mg/Kg and 0.13 mg/Kg, respectively, while the mercury levels in all biota samples had exceeded the quality standard values ​(0.03 mg/Kg). This indicates that mercury has accumulated in the food chain in the water near the mine site.
Viskositas dan Aktivitas Antibakteri Sabun Cair Berbasis VCO dengan Penambahan Ekstrak Etanol Daun Kelor (Moringa oleifera) Terhadap Bakteri Patogen
Authors: Satrimafitrah Pasjan , Afdal Mohamad , Jusman  , Razak Abd. Rahman , Ridhay Ahmad , Inda Nov Irmawati
Published: April 2022

This research was conducted by making VCO-based liquid soap with the addition of ethanol extract from Moringa leaves (Moringa oleifera). The purpose of this research was to determine the mass ratio of ethanol extracts of Moringa leaves and Virgin Coconut Oil (VCO) which produces soap with the highest antibacterial activity against tested bacteria. The other purpose is to determine the effect of the mass ratio against the viscosity of liquid soap. The research design used was a Completely Randomized Design (CRD) with the independent variables being the mass ratio of Moringa leaf ethanol extract and VCO which consists of five levels of 0:75 (F1), 1.5:73.5 (F2), 3:72(F3), and 4.5:70.5(F4) (w/w). The soap produced was tested for antibacterial activity againts Staphylococcus aureus, Escherichia coli, and Staphylococcus epidermidis using agar diffusion method as well as viscosity tests. The results showed that the antibacterial activity of liquid soap tends to be higher with increasing levels of ethanol extract of Moringa leaves. The liquid soap formula with the ratio of Moringa leaf ethanol extract: VCO of 3:72 (w/w) (Formula F3) had relatively higher antibacterial activity against the three tested bacteria. The inhibition zones against Staphylococcus aureus, Escherichia coli, and Staphylococcus epidermidis were 22.302 mm, 33.230 mm, and 36.490 mm, respectively, while the viscosity value of liquid soap was 47.433 cP.
Determination of Mercury (Hg) and Lead (Pb) in Sedimen of Batanghari River in Dharmasraya Regency
Authors: Mawardi Mawardi , Juita Rahma , Mawardi Fadhlurrahman , Ariani Kori , Novari Nindia , Ismail Irfan Ananda
Published: April 2022

Batanghari River is a river that crosses the Province of West Sumatra and Jambi Province, which flows through the Dharmasraya Regency area. Along this river, many illegal gold mines are found, which use mercury (Hg) as a gold-binding medium, and fuel oil containing lead (Pb) as fuel for machinery used in mining operations. This mining activity is the cause of the presence of Hg and Pb in the mining environment which is passed by the Batanghari river. The source of Pb is also from tailings, which is the remaining metal ore processing that does not meet the requirements to be taken at the time of mining. the presence of Hg and Pb metals in the aquatic environment will have an impact on the environment and interfere with the health of miners and the surrounding community, because Hg and Pb are heavy metals that are toxic. Research has been carried out on the Batanghari river sediments in January and April 2019 using the Atomic Absorption Spectrophotometer (FAAS) method to measure Pb and the Cold Vapor Atomic Absorption Spectrophotometer (CV AAS) method for Hg metal. The results showed that each metal Hg and Pb, in mg metal per Kg sediment, in the range of 0.08 mg/kg – 10.21 mg/kg, and 1.81 mg/kg – 23.10 mg/kg. Based on these data, it can be said that in January and April 2019 the metal content of Hg and Pb in the Batanghari river air was above the river water quality standard according to the Government Regulation of the Republic of Indonesia, namely 0.001-0.002 mg/L for Hg and 0.03 mg/L for Pb
Brand Value and Tourists’ Satisfaction in Lombok Indonesia as a Halal Tourism Destination
Authors: Yusup Muhamad , Mas'ud Riduan , Johari Maimunah
Published: April 2022

Since 2015, the Ministry of Tourism and Creative Economy of the Republic of Indonesia has appointed Lombok of West Nusa Tenggara as a halal tourism destination. Because of its natural beauty, which is comparable to that of Bali, the majority of the population is Muslim, and the island has a distinct religious culture and history, Lombok has a lot of promise in promoting halal tourism in Indonesia. This study intends to elucidate the relationship between destination brand awareness, brand image, brand quality, and destination brand value in increasing the destination brand satisfaction of tourists visiting Lombok. This study proposes a new model and clarifies the concept of a new indicator on the variable of destination brand value. Upon analysis of structural equation modeling (SEM) using convenience sampling employing WarpPLS software to 250 respondents, it was proven that the research model was accepted with a coefficient of determination (R2) of 86.6%. The proposed model shows destination brand value to be a determinant of tourists’ satisfaction. The model also proves that indicators of convenience, reasonable cost, fun, and getting benefits make a positive contribution to brand value destinations. This study offers practical implication that tourism managers should pay attention to and improve brand image, which currently has little impact on destination brand value, by building brand popularity and competitive advantages.
On the fractional optimal control problems of Hepatitis B with the Caputo operator
Authors: Zhang Jingwen , Zhou Yize , Wang Zhigang , Wang Haohua
Published: April 2022

The long memory effects of a system can be regarded as fractional. This
paper deals with a newly constructed system of equation for Hepatitis B
disease of fractional control problems in sense of Caputo fractional
order derivative. The model considers four different health classes of
populations, susceptible, acute infections, chronic infections and
recovered, as well as a control by applying a strategy of isolation,
treatment and vaccination. Initially, the equilibrium points and
stability of the system are studied and sensitivity analysis
complemented by simulation is performed to determine how changes in
parameters affects the dynamical behavior of the system. For singular
kernel of fractional derivative, the necessary conditions for optimality
of Hepatitis B system are derived. An effective numerical simulation
depended on trapezoidal approximation is to verify the control effect in
terms of the transient response compared to the different fractional-
and integer-order derivatives, and additional graphical solutions are
presented for ease of understanding. This study may provide a strong
theoretical basis for uncovering the importance of the long memory
effects in the control of hepatitis B.
Intestinal Tuberculosis –The challenging mimicker – in a young Sudanese patient: A Case Report
Authors: Abdoallah Hayat , Babiker Hiba
Published: April 2022

This article reported a case of intestinal tuberculosis in a young
patient . ITB could mimic many other diseases like inflammatory bowel
diseases (crohn‘s disease ) , abdominal lymphoma and others which make
it difficult to differentiate hence many ITB patients could get
mis-diagnosed and suffer wrong treatment consequences .
Aneurysm of ascending aorta incision after double valve replacement
Authors: Yang Qi , Li Xin , Deng Mingbin
Published: April 2022

Background: Ascending aortic aneurysm is a common clinical
disease, whereas the aneurysm at the incision of ascending aorta after
valve replacement has not been reported. Aims: We report a case
of giant ascending aortic incision aneurysm requiring surgical
correction after double valve replacement. Materials &
Methods: A 45‐year‐old male was referred to our department with
dyspneic respiration after exercises for 1+ months, having previously
undergone a mitral and aortic valve bivalve replacement 15+ years ago.
The parasternal long-axis section of transthoracic echocardiography
provided that the diameter of ascending aorta was thickened( 59mm).
Computed tomography angiography (CTA) of the aorta showed a localized
anterior protrusion aneurysmal of the ascending aorta with a diameter of
approximately 69 mm, and the tube wall was severely calcified.
Results: Under cardiopulmonary bypass, the large aneurysm was
incised and the artificial blood vessels were replaced. The patient
achieved an uneventful postoperative recovery with no significant
complications. Discussion: Ascending aortic incision aneurysm
has the same treatment regimen as ascending aortic aneurysm although
it’s extremely rare. Conclusion: Open surgery was indispensable
in this case owing to the large aneurysm and the condition liable to
rupture.
MANAGING TAKO-TSUBO WITH DELAYED SYSTOLIC ANTERIOR MOTION AND RIGHT VENTRICLE DYSFUNCTION AFTER MITRAL VALVE REPAIR
Authors: Garufi Luigi , Irace Francesco , Salica Andrea , Paulis Ruggero De
Published: April 2022

Takotsubo syndrome is a rare and serious condition, often induced by
major physical or psychological stress. Both its diagnosis and treatment
could be challenging; herein we describe a complex case of Takotsubo
syndrome following mitral valve repair surgery associated with
occurrence of systolic anterior motion of the mitral valve , severe
mitral regurgitation, consequent right heart failure and its peculiar
clinical management.
An Observational Pragmatic Quality of Life Study on Paediatric Tonsillectomy and Waiting for Surgery
Authors: Huynh Julie , Woods Charmaine , Ooi Eng
Published: April 2022

Introduction Paediatric tonsillectomy performed for sleep disordered
breathing or recurrent tonsillitis and the effects on a child’s quality
of life symptoms while waiting for surgery in an Australian public
health system have not previously been investigated. This study
investigated parental perceptions of the effects of tonsillectomy on
their child’s quality of life while awaiting tonsillectomy and following
surgery. Design, Setting and Participants An observational study was
undertaken at a tertiary Australian hospital. Parents of paediatric
patients (2 to 16 years of age) listed for tonsillectomy completed a
validated quality of life questionnaire (T—14 Paediatric Throat
Disorders Outcome Test) at the initial consultation, on day of surgery,
6 weeks post-operatively and 6 months post-operatively. T-14 scores were
compared using the Related-Samples Wilcoxon Signed Rank Test. Results
Parents of 167 children participated in this study. There was a median
wait time of 174 days (IQR 108 – 347) from the initial consultation
until the day of surgery, with no significant change in median T-14
scores (35 [IQR 22 - 42] vs 36 [IQR 22 - 42]; n= 63; p
> 0.05). There was a significant decrease from
pre-operative T-14 scores to 6 weeks post-operatively (33.5 [IQR 22 -
42] vs 2 [IQR 0 - 5]; n = 160; p < 0.001), and this was
sustained with a minor improvement at 6 months post-operatively (6-week
2 [IQR 0 - 5] vs 6-month 0 [IQR 0 - 2]; n = 148; p <
0.001). Conclusion Paediatric tonsillectomy improves the patient’s
quality of life as perceived by their parents with a sustained benefit
in the long term. There is no improvement to the patient’s quality of
life while awaiting tonsillectomy, thus patient welfare can be improved
through reducing waiting times for surgery.
The Relations between Summer Droughts/Floods and Oxygen Isotope Composition of Precipitation in Dongting Lake Basin
Authors: Liu Zhongli , Zhang Xinping , Xiao Zhuoyong , He Xinguang , Rao Zhiguo , Guan Huade
Published: April 2022

Stable isotopes respond sensitively to environmental evolution and
record it in different geological archives due to fractionation. The
stable isotope composition of water ( δO and
δD) has been widely applied in fields
including hydrometeorology, weather diagnosis, and palaeoclimate
reconstruction. In recent years, the stable oxygen isotope of
precipitation ( δO ) in
southern China are valuable proxies of environmental variables, however,
their interpretations of them have been controversial. Considering that
the summer monsoon circulation brings about a large amount of
precipitation, the temporal variation and range of the annual δO are consistent with those of the
summer δO . Based on the
observed and simulated data on oxygen isotope composition of
precipitation, the linkage between summer precipitation ( P) and
δO in the Dongting Lake
Basin and their possible influencing factors are demonstrated.
Meanwhile, the contribution of different factors is analyzed by using
multiple linear stepwise regression. The results indicate that the
temporal variation of summer δO
is consistent with that of annual δO and the amount effect is
identified in summer in the basin. Besides, the annual δO shows a significantly negative
correlation with summer precipitation. It demonstrates that the value of
stable isotopes in precipitation may be considered a proxy of summer
precipitation in Dongting Lake Basin. Statistically, on an interannual
timescale, the more south-westerly the Western Pacific Subtropical High
(WPSH) extended, the higher the δO
was and vice versa, indicating that there
appeared circulation effect in the basin. In regression models based on
the observed data in Changsha and the simulated data for the entire
basin, the local summer precipitation always served as an important
factor. It can be exemplified by comparing the local and upstream
rainout along with water vapor flux transporting pathways in dry and wet
summers. These results can potentially improve the reconstruction of
paleoclimate in the East Asian monsoon region. Further study is needed
to determine the contribution of local and large-scale factors to the
oxygen isotope composition of precipitation.
AS RELAÇÕES ENTRE O DESEMPENHO ACADÊMICO E A PROCRASTINAÇÃO: UM ESTUDO EXPLORATÓRIO COM ACADÊMICOS DOS CURSOS DE GRADUAÇÃO EM CIÊNCIAS CONTÁBEIS E ADMINISTRAÇÃO DO PIAUÍ
Authors: Silva Luzilene de Sousa , Bernardes Juliana Reis , Nascimento João Carlos Hipólito Bernardes do , Veras Salvina Lopes Lima , Castro Maurício Mendes Boavista de
Published: April 2022

Na presente pesquisa, investigou-se a relação entre o comportamento procrastinador e o desempenho acadêmico de alunos do curso de graduação em Ciências Contábeis e Administração de Instituições de Ensino Superior (IES) do Piauí. A uma amostra composta por 771 discentes, provenientes de Instituições de Ensino Superior públicas e privadas, foi aplicado o instrumento General Procrastination Scale (GPS) proposto por Lay (1986), adaptado ao contexto brasileiro por Ribeiro et al. (2014).  Como técnica de análise dos dados, foi utilizada a Modelagem de equações estruturais por mínimos quadrados parciais (PartialLeastSquaresStructuralEquationModeling – PLS-SEM). Os resultados indicam que, independentemente do efeito das variáveis, curso, ensino, gênero, idade e período, a Procrastinação influencia negativamente o desempenho acadêmico discente. Em termos de relevância científica, o estudo contribui ao reportar evidências empíricas da estrutura bidimensional do construto procrastinação, conforme GPS, além de isolar o efeito sistemático das variáveis de controle Curso, Ensino, Gênero, Idade e Período.
UMA ANÁLISE DOS FATORES EXPLICATIVOS DA SITUAÇÃO FISCAL NOS MUNICÍPIOS DE MINAS GERAIS
Authors: Oliveira Daiane Alves de , Magalhães Elizete Aparecida de
Published: April 2022

A situação fiscal de um ente federado pode ser afetada por condições econômicas, fiscais, demográficas, políticas, entre outras. Este estudo teve como objetivo identificar os fatores municipais que influenciam a situação fiscal dos municípios de Minas Gerais, no período de 2013 a 2018. Para tanto, foi realizado um estudo com dados em painel dinâmico, cuja proxy de situação fiscal foi o Índice de Gestão Fiscal da Federação das Indústrias do Estado do Rio de Janeiro quatro indicadores – Autonomia, Gastos com Pessoal, Liquidez e Investimentos. Os resultados apontam que, ao longo do período analisado, o Índice de Gestão Fiscal médio apresentou uma queda de 2,57% ao ano, ocasionada, principalmente, pelos indicadores de Gasto com Pessoal e Investimentos. A partir da estimação do modelo, constatou-se que a situação fiscal do período passado tende a contribuir para uma melhor gestão orçamentária futura, e que as variáveis Produto Interno Bruto per capita e taxa de urbanização são as que contribuem positivamente para explicar a gestão fiscal. Por outro lado, um maior esforço orçamentário em educação, aumento na proporção de idosos, bem como da população jovem, tendem a piorar a situação fiscal dos municípios analisados. Conclui-se que os fatores levados em consideração são relevantes na explicação da gestão das contas públicas, devendo ser considerados pelos agentes públicos nas decisões voltadas para o planejamento e execução orçamentária.
The Joint Effects of Argument Quality and Interactivity on Nonprofessional Investors' Perceptions of Disclosure Credibility and Investment Decisions
Authors: Ajayi Oluwakemi (Kemi) , Zhang James (Yibo)
Published: April 2022

We employ the elaboration likelihood model (ELM) to investigate the dual influences of the central route (i.e., argument quality) and the peripheral route (i.e., interactivity) on investment-related judgments and decisions. In a between-subject experiment using 297 participants from Amazon Mechanical Turk (MTurk) to proxy for nonprofessional investors, we examine the joint effects of interactivity, argument quality, and news valence. Our results indicate that nonprofessional investors are more likely to invest more in firms when the argument quality of a disclosure is strong and accompanied by interactive presentations. Further, PLS analyses examining perceptions of interactivity provide additional insights about the mechanisms of the effects. This research contributes to the disclosure literature by demonstrating the influence of increased interactivity in disclosure settings, and to the accounting information systems research on interactivity in financial reporting by demonstrating the importance of considering perceived interactivity in addition to the provision of actual interactive design features.
PENALAAN OPTIMAL KONTROLER PSS-PID PADA SISTEM SINGLE MACHINE INFINITE BUS MENGGUNAKAN ANT COLONY OPTIMIZATION
Authors: Djalal Muhammad Ruswandi , Kadir Nasrun
Published: April 2022

Perubahan beban pada sistem tenaga listrik secara tiba-tiba menyebabkan terjadinya gangguan dinamik. Gangguan tersebut menyebabkan kestabilan generator terganggu, karena generator tidak merespon gangguan tersebut secara cepat. Hal ini menyebabkan terjadinya osilasi pada generator berupa osilasi frekuensi dan sudut rotor. Salah satu peralatan kontrol tambahan yang mampu meningkatkan kestabilan suatu generator adalah Power Sistem Stabilizer (PSS) dan Proportional Integral Derrivative (PID). Dalam aplikasinya, penentuan parameter kontroler ini masih menggunakan metode trial & error, metode ini sangat sulit untuk mendapatkan parameter yang tepat. Dengan menggunakan metode cerdas berbasis Ant Colony didapatkan parameter PSS-PID yang optimal. Dengan penalaan optimal didapatkan respon frekuensi dan sudut rotor sistem SMIB yang optimal, ditunjukkan dengan respon overshot sistem yang minimum. Kontroler mampu memberikan kestabilan sehingga osilasi overshoot dapat diredam, serta kinerja settling time yang semakin cepat untuk sistem menuju ke kondisi steady state. Untuk menguji kestabilan sistem SMIB digunakan studi kasus penambahan dan pengurangan beban, dengan metode kontrol yang diusulkan PSS-PID yang dioptimasi menggunakan Ant Colony.
SINTESIS DAN ANALISIS KANDUNGAN MINERAL DAN KARAKTERISTIK SIFAT LISTRIK NANOPARTIKEL PASIR BESI PANTAI TELINDUNG KABUPATEN LOMBOK TIMUR
Authors: Asri Laelatul , Didik Lalu A. , Bahtiar Bahtiar
Published: April 2022

This study aims to determine the mineral content as well as the characteristics of the electrical properties of the iron sand nanoparticle samples of the Telindung beach. Synthesis of iron sand nanoparticles can be done by sharing one method, namely the coprecipitation method. In the coprecipitation process, researchers used HCl and NH4OH solutions to make a sample of nano-sized iron sand (nanoparticles) of 5 samples with different sampling distances of 3 meters, 6 meters, 9 meters, 12 meters, and 5 meters. Each finished sample is then analyzed for its mineral content using AAS. The results shows that the higher the sampling distance, the higher the mineral content, namely the total Fe in the sample of iron sand nanoparticles (8.28%, 8.79%, 8.85%, 9.07% and 9.74%). Characteristics of electrical properties namely resistivity using 4 point probes with a series of power supply devices and multimeters by making 1 sample 5 times the measurement so that the value of resistivity (8.3 x 104 ,m, 9.1 x 104 Ωm, 9.6 x 104 Ωm, 10 Ωm, 3 x 104 Ωm, 11.3 x 104 Ωm), for dielectricity using a plate parallel to the LCR meter, one sample of 10 times the measurement so as to obtain the value of the dielectric constant (6.4 x 104 F, 7.9 x 104 F, 9 , 8 x 104 F, 11.6 x 104 F and 13.1 x 104). So it can be said that the higher the value of minerl candlengan that is the total Fe, the higher the value of the characteristic electrical properties are resistivity and dielectricity.
PERBANDINGAN ALGORITMA FUZZY C-MEANS DAN ALGORITMA NAIVE BAYES DALAM MENENTUKAN KELUARGA PENERIMA MANFAAT (KPM) BERDASARKAN STATUS SOSIAL EKONOMI (SSE) TERENDAH
Authors: Saputra Putu Satya
Published: April 2022

Penelitian ini bertujuan untuk mengetahui : hasil clustering algoritma Fuzzy C-means, hasil klasifikasi Naïve Bayes, dan tingkat akurasi penerapan Fuzzy C-means dan Naïve Bayes dalam penentuan penerima bantuan sosial di Kabupaten Buleleng berdasarkan Basis Data Terpadu (BDT). Data yang digunakan yaitu Basis Data Terpadu sesuai Kepmensos No. 71/huk/2018 yang didapat di Bidang Perlindungan dan Jaminan Sosial Dinas Sosial Kabupaten Buleleng. Data tersebut dikelompokkan menjadi 3 kelompok yaitu penerima bantuan Program Keluarga Harapan (PKH), Bantuan Sosial Pangan (BSP) dan Penerima Bantuan Iuran (PBI) Jaminan Kesehatan. Metode perhitungan akurasi data mining menggunakan confusion matrix. Hasil implementasi algoritma dengan 1350 data keluarga menunjukan tingkat akurasi yang diperoleh algoritma Naïve Bayes lebih baik dari pada Fuzzy C-means. Nilai akurasi Naïve bayes sebesar 74% dan akurasi Fuzzy C-means sebesar 67%. Dari pengujian yang telah dilakukan dengan menggunakan perhitungan confusion matrix didapatkan hasil algoritma yang efektif digunakan dalam menentukan keluarga penerima manfaat tersebut adalah algoritma Naïve Bayes.
SISTEM KULTUR SEMIKONTINU DALAM PRODUKSI LIPID DAN PENYISIHAN COD MENGGUNAKAN KONSORSIUM MIKROALGA DARI PALM OIL MILL EFFLUENT (POME)
Authors: Elystia Shinta , Novira Tria Bela , Muria Sri Rezeki
Published: April 2022

Penggunaan energi sebagian besar masih berasal dari sumber energi tidak terbarukan yang jumlahnya semakin berkurang. Produksi biofuel dari kadar lipid dalam biomassa konsorsium mikroalga dapat menjadi salah satu energi alternatif dalam menghasilkan energi terbarukan. Palm Oil Mill Effluent (POME) mengandung bahan organik yang dapat menjadi sumber nutrisi untuk pertumbuhan konsorsium mikroalga seiring terjadinya penyisihan COD pada air limbah. Produktivitas biomassa dan kadar lipid akan meningkat setelah dilakukan pergantian limbah sebagai penambahan nutrisi pada medium kultur. Penelitian ini bertujuan untuk mengetahui pertumbuhan konsorsium mikroalga, kadar lipid yang dihasilkan, serta efisiensi penyisihan COD pada POME. Kultivasi dilakukan dengan mengganti setengah volume kultur dengan fresh POME pada periode pergantian limbah setiap 3, 4, dan 6 hari selama 12 hari kultivasi. Hasil penelitian menunjukkan kondisi kultivasi terbaik terdapat pada pergantian limbah setiap 6 hari dengan kerapatan sel mikroalga 1,01 x 107 sel/ml, kadar lipid 19,33%, serta efisiensi penyisihan COD 81,25%. Dari hasil penelitian dapat disimpulkan bahwa sistem semikontinu dengan adanya pergantian limbah dapat meningkatkan kerapatan sel mikroalga karena nutrisi dalam medium kultur terpenuhi, sehingga kadar lipid dan efisiensi penyisihan COD yang dihasilkan akan semakin meningkat. Kata Kunci :     Konsorsium Mikroalga, Palm Oil Mill Effluent (POME), Periode  Pergantian Limbah, Kadar Lipid, COD
PENYISIHAN NITROGEN TOTAL DALAM LIMBAH CAIR HOTEL DENGAN SISTEM MOVING BED BIOFILM REACTOR MENGGUNAKAN Chlorella sp.
Authors: Chairani Mustika , Elystia Shinta , Muria Sri Rezeki
Published: April 2022

Limbah cair hotel dapat dimanfaatkan oleh mikroalga Chlorella sp. sebagai sumber nutrisi bagi pertumbuhannya sehingga dapat menurunkan kadar nitrogen total. Salah satu proses pengolahan limbah yang dapat meningkatkan pertumbuhan mikroalga yaitu Moving Bed Biofilm Reactor. Pada prinsipnya, Moving Bed Biofilm Reactor merupakan pertumbuhan suspensi yang ditingkatkan dengan menambahkan biocarrier di dalam reaktor sebagai tempat perkembangbiakan mikroorganisme, sehingga terjadi dua proses pengolahan yakni pertumbuhan suspensi dan pertumbuhan melekat. Penelitian ini mempelajari pengaruh volume pengisian biocarrier Kaldnes 1 (K1) terhadap penurunan kadar nitrogen total dalam limbah cair hotel. Penelitian ini dilakukan secara batch dengan perlakuan volume pengisian Kaldnes 1 (K1) terhadap penurunan kadar nitrogen total dalam limbah cair hotel dengan 4 level yang berbeda, yaitu 0% (tanpa penambahan Kaldnes 1 (K1)), volume pengisian Kaldnes 1 (K1) sebanyak 10%, 20%, 30% (volume limbah). Proses pengolahan dilakukan selama 5 hari dengan penyinaran cahaya matahari dalam MBBR. Perlakuan dengan volume pengisian Kaldnes 1 (K1) 20% mampu menyisihkan nitrogen total dengan efisiensi penyisihan sebesar 91,96% pada waktu kontak terbaik yaitu hari ke-5.
HUBUNGAN KEKERABATAN VARIETAS UBI BANGGAI (Dioscorea sp.) DI SULAWESI TENGAH BERDASARKAN KARAKTER FENOTIPIK
Authors: Suleman Samsurizal M. , Budiarsa I Made , Dhafir Fatmah , Sulfianti Sulfianti
Published: April 2022

Penelitian ini bertujuan untuk menganalisis dan mendeskripsikan hubungan kekerabatan varietas ubi banggai (Dioscorea sp.) berdasarkan karakter fenotipik. Penelitian ini merupakan jenis penelitian dekskriptif kuantitatif. Sampel penelitian  diperoleh dari di Tinangkung Utara Kabupaten Banggai Kepulauan yaitu Desa Palam, Desa Luksagu dan Desa Bangpanga. Karakterisasi mengacu pada 15 karakter morfometrik, 2 karakter meristik dan 27 karakter kualitatif. Data diolah menggunakan Program File Editor (PFE), dianalisis menggunakanan analisis klaster dengan program Multivariat Statistical Package (MVSP). Indeks similaritas dihitung menggunakan metode Simple Matching Coefficient, rekonstruksi dendogram menggunakan UPGMA alogarithm. Hasil penelitian menunjukkan bahwa 13 varietas ubi banggai di Kabupaten Banggai Kepulauan, Sulawesi Tengah membentuk 2 klaster dan memiliki hubungan kekerabatan yang dekat dengan indeks similaritas antara 0,766-1,00%. Hasil penelitian ini dapat menjadi informasi dasar yang sangat diperlukan dalam upaya pelestarian dan pengembangan Ubi Banggai sebagai sumber pangan alternatif. Selain itu, informasi ini juga diharapkan dapat dimanfaatkan dalam melengkapi referensi ilmiah terkait penelitian Ubi Banggai.