bluuebunny/crossref_metadata_2025 huggingface dataset:
Discussões sobre formação de professores e interdisciplinaridade: O que dizem as Resoluções CNE/CP 2/2015 E CNE/CP 2/2019
Authors: Dameão Ana Paula , Farias Gerson dos Santos , Pereira Patrícia Sandalo
Published: May 2023

Este artigo tem como temática discussões sobre a interdisciplinaridade e a formação de professores, tomando como apoio documentos oficiais. Para isso, temos por objetivo compreender como a interdisciplinaridade está sendo desenvolvida na formação inicial de professores, com base na Resolução CNE/CP n° 2/2015 e na Resolução CNE/CP n° 2/2019. Como aportes teóricos, dialogamos com estudos que tematizam a interdisciplinaridade, a partir das especificidades e complexidades que atravessam a formação inicial de professores. Com relação a metodologia, adotamos a perspectiva da pesquisa documental, por meio de pressupostos da análise documental. Dessa forma, buscamos verificar como os termos - interdisciplinar, interdisciplinares e interdisciplinaridade - apareceram nestes documentos e, principalmente, qual o contexto de inserção. Os resultados revelam, de maneira geral, uma ausência na conceituação da interdisciplinaridade e a falta de orientação para com o desenvolvimento de ações que assegurem o trabalho interdisciplinar. Com isso, é possível evidenciar nas intencionalidades político-pedagógicas uma carência de subsídios que viabilizem o ensino interdisciplinar. Para além disso, foi possível identificar também uma acentuada diminuição nas menções de um documento para o outro, bem como uma relação de correspondência dos termos com a formação de professores, entretanto, não conseguimos diagnosticar orientações claras com relação ao desenvolvimento e efetivação.
INVESTIGANDO O ENSINO DE NÚMEROS INTEIROS POR MEIO DA SEQUÊNCIA DE ENSINO INVESTIGATIVA (SEI)
Authors: Santos Lizandra Meire Moreira , Lavor Otávio Paulino
Published: May 2023

Um erro comum verificado nos alunos, principalmente aqueles que estão conhecendo os números inteiros, é a falta de atenção e/ou até mesmo uma confusão em relação aos sinais que antecedem os números. Nessa perspectiva, este trabalho propõe, por meio da Sequência de Ensino Investigativo (SEI), dar significado ao que os alunos aprendem na escola, não visando somente a nota por excelência, e sim uma aprendizagem significativa quanto a importância dos números inteiros em determinadas situações cotidianas. Dessa forma, é possível contribuir para um ensino-aprendizagem mais dinâmico e proveitoso da matemática, fazendo uso de tecnologias, como, por exemplo, aplicativos direcionados ao conteúdo abordado, favorecendo o entusiasmo dos alunos com a disciplina, tornando-a leve e divertida de estudar. A proposta trazida para os alunos do 7º ano do Ensino Fundamental de uma escola pública no município de Marcelino Vieira/RN trabalha operações com números inteiros mediante uso dos aplicativos Number Line e PhET, além de simulações no computador, com a pretensão de deixar contribuições teóricas e práticas com um experimento inovador, mostrando resultados satisfatórios, tanto para a pesquisadora quanto para os alunos, em relação ao início da pesquisa para o final.
Co-Governance and the Case for Shared Decision Making
Authors: Jones Carwyn
Published: May 2023

This article explores some of the key features of co-governance, or shared decision making, between Māori and the Crown. Co-governance models create the conditions for making better decisions by sharing decision making with Māori where Māori communities have a distinctive interest. Such models are able to draw on the distinctive experiences, knowledge and expertise that Māori communities can bring. Shared decision making enhances the legitimacy and durability of decisions by giving effect to rights under te Tiriti o Waitangi. The article also identifies some key principles of effective co-governance and provides some brief examples where shared decision making is being implemented to illustrate the range of situations in which such models are applicable.
Analysis of New Materials Application in Municipal Road Construction
Authors: Li Guangjun , Zhang Lu , Nan Lin , Feng Manman , Liu Shuyan
Published: May 2023

In order to promote the development of road traffic in our country, it is necessary to strengthen the research on municipal road construction technology, constantly innovate construction technology and construction technique, and then effectively ensure the rapid development of urban traffic. This paper mainly elaborates on asphalt road surface regeneration technology, modified asphalt concrete, concrete road surface anti-cracking technology, three-dimensional printing technology, composite material road surface, polymer composite materials, etc., to ensure the development of urban transportation and the quality of municipal road projects.
Application of Long-Span Continuous Bridge Technology in Bridge Construction
Authors: Nan Lin , Yang Qing , Liu Yan , Meng Xu , Ye Yingying , Sun Zhongyang
Published: May 2023

In order to promote the rapid development of urbanization in our country, it is necessary to improve the construction level and technology of bridge engineering. For long-span continuous bridge technology, it has the characteristics of wide application range, various applicable conditions, and short construction period. Therefore, it is necessary to pay attention to the application of long-span continuous bridge technology. This article mainly analyzes its application in bridge construction, hoping to provide some reference for future use.
Technical Analysis of Highway Bridge Static Load Test
Authors: Tu Ke , Ye Yingying , Wu Daqing , Zhou Yunyong , Deng Wenming
Published: May 2023

Highway bridges are an important part of the transportation industry and can promote social economic construction and development. In actual operation, highway bridges are often damaged due to overload and natural factors, which tend to affect the safety and shorten the service life of these bridges. Assessing the overall state and performance of highway bridges is therefore a key element. Static load test, which is a type of sustainable detection experiment, has many advantages, including low cost, high efficiency, and high accuracy. In this paper, the bridge structure is analyzed through the application of theoretical calculations and relevant comparisons, so as to judge the operating state of the bridge.
The Impact of Guiding Students to Participate in Skills Competitions on the Growth of Young Teachers
Authors: Wang Shang , Zhen Xuesong , Chen Jiayi , Li Dehou
Published: May 2023

The improvement of the teachers’ quality will lead to the improvement of school education. With the continuous progress and development of modern society, the requirements of skills competition in vocational colleges are also increasing. Young teachers can improve themselves by guiding students to participate in skills competition. This changes the teachers’ teaching philosophy and allows them to master new technologies and techniques. Besides, skills competitions also enriches curriculum resources while improving teaching quality. In this paper, we reviewed research papers and outlined the positive effects of guiding students to participate in skills competition on the growth of young teachers. Several targeted suggestions are then put forward with the goal of facilitating the transformation of the teachers’ teaching philosophy, enhancing their professional development, and ensuring their rapid growth.
Edukasi Bahaya Timbal pada Sekolah Rentan Polusi terhadap Prestasi Akademik dan Kesehatan Siswa
Authors: Tri Susilowati Indah , Dewi Noviana , Widhiyastuti Endang
Published: May 2023

This community service project is a promotive and preventive activity that aims to educate students about the danger of lead exposure accumulation in students, delivered to teaching staff throughout Central Java. This activity was conducted as counseling using the webinar method through zoom meetings. Participants were enthusiastic, as seen from the questions asked during the discussion and question-answer sessions. The ability of participants to answer pretest and posttest questions showed an increase in participants’ knowledge between before and after the counseling. The average score of the pretest was 7.00 with a standard deviation of 3.428, while the average score of the posttest was 14.06 with a standard deviation of 1.983. A paired t-test was then used to determine whether the scores from the pretest and posttest differed. Given that the p-value for the difference between the pretest and posttest scores was 0.000, it can be said that the difference is statistically significant. It can be determined that the partner satisfaction questionnaire's answers were valid because they ranged from 0.549 to 0.905 when it was previously assessed for validity using the Pearson product-moment method. The instrument passed the reliability test with a Cronbach Alpha rating of 0.925, indicating that it was trustworthy. According to the results of the partner satisfaction survey, the typical score was 4.09. Thus, it can be concluded that the activity satisfies the participants. Based on the results of data analysis, it can be said that the counseling activities can increase participants’ knowledge about the danger of lead exposure accumulation on students’ achievement.
Dance Video Development Tutorial Betaja Dayak Kancing’k Meliau District for Art Culture Learning in Junior High School
Authors: Tanema Sesilia Wynni Wilhimina , Mering Aloysius , Astuti Indri
Published: May 2023

The purpose of this study was to develop a video tutorial for the Betaja Dayak Kancing’k dance in the Meliau sub-district for learning Cultural Arts in Junior High School. To achieve the research objectives, the Research and Development (R&D) method of the ADDIE development model was used. With the ADDIE Development model, the research is carried out through the stages of (1) Analyze, (2) Design, (3) Develop, (4) Implement, and (5) Evaluate. This research was conducted at SMP Brother Pontianak 9th grade with 30 students and four validators, design experts, media experts, and dance learning materials experts. Data from expert instruments with qualitative and quantitative analysis as a whole from the results of data analysis (in the range of values 1-5) The tutorial video design was declared "Very feasible" with an average of 4.27. Likewise, the analysis of empirical test data with individual test procedures, small groups, and field tests. The 32 9th grade students of Brother Pontianak Junior High School with an average skill score of 88 in the "Very Good" category. The results of the effectiveness test in this study were the results of the dancing skills of the students, the results of which were 30 students, which showed that as many as 24 students got an average score of 85 and 6 students with an average of 65 students, it was concluded that the average result of students' dancing skills was 81.22 with a very good category. good. With the data obtained, video tutorials can be applied in junior high schools in learning arts and culture with dance material.
Analysis Of The Effect Of Work-Life Balance, Self-Esteem And Work Motivation On Organizational Commitment Moderated By Organizational Justice On Workers In Yogyakarta
Authors: Hadi Syamsul , Pebrianti Efni , Kirana Kusuma Chandra
Published: May 2023

The purpose of this study is to impact the effect of work-life balance, self-esteem and work motivation on organizational commitment moderated by organizational justice in the workforce at Yogyakarta. This research is quantitative. The population in this study was the entire workforce at Yogyakarta. The sample used in this study was 100 employees. The sampling technique in this research is non-probability sampling using purposive sampling. Data was collected by distributing questionnaires. The data analysis technique used is the inner model and path analysis. The data that has been obtained is processed using SmartPLS 3.0. the results of this study indicate that work-life balance has a positive and significant effect on organizational commitment; self-esteem has a positive and significant effect on organizational commitment; work motivation has a positive and significant effect on organizational commitment; work-life balance, self-esteem and work motivation have a positive and significant effect on organizational commitment moderated by organizational justice.
Online Learning Models in The Era and Post-Pandemic COVID-19
Authors: Fikri Asyrul , LN Firdaus , Hadriana Hadriana , Sumarno Sumarno
Published: May 2023

Pandemic COVID-19 has shifted education from face-to-face teaching to online-based distance learning. Educators must prepare strategic steps in responding to this transition to achieve learning objectives. To implement an online learning system, learning strategies and models that meet online learning demands must be made. For this reason, this study aims to analyze the online learning model in the era and post-pandemic COVID-19. Literature research methods are used in this study. Data sources were obtained by collecting relevant literature such as books, journals or scientific articles related to the topic: (i) Pandemic COVID-19; (ii) learning model; and (iii) online learning—analysis technique using content analysis. The results showed four appropriate learning models used in the online learning process: ICT -based learning models, problem-based learning models, blended learning models, and module-based learning models. The four learning models can support a distance learning system, increase student independence, improve digitalization skills and discipline, and increase student collaboration.
Analysis of Language Errors on The Thematic Semester Final Examination Problems 1 and 2 Elementary School Level
Authors: Sari Ayu Puspita Indah , Mardhotillah Mardhotillah
Published: May 2023

In the 2013 curriculum, which applies integrated thematic learning, Indonesian plays an essential role as a vehicle for carrying knowledge, from being a means of communication and a means of thinking. Therefore, language errors must be minimized in teaching and learning. This study aims to describe the types of errors and the causes of errors in writing the Final Semester Examination questions in Thematic 1 and Thematic 2. This research was carried out at Baitur Rahmah Elementary School. This type of research is descriptive qualitative research. Data collection methods used are observation and interviews. The data analysis technique was carried out through three stages: note, listen, and record. This research uses data source and method triangulation to test data validity. The study results illustrate that there are still many spelling, word, and sentence errors. This is caused by several sources, namely the last educational background of the teacher who teaches, the lack of understanding of the rules in writing, and the lack of accuracy in making the questions.
Students Water Literacy in South Sumatera Indonesia, Does Indigenous Culture Had Influence?
Authors: Meilinda Meilinda , Khoiron Nazip , Riyanto Riyanto , Anggraini Nike , Sukardi Rendi Restiana
Published: May 2023

Water literacy, or the culmination of water-related knowledge, attitudes and behaviours, is a relatively new field of study with growing importance for sustainable water management and social water equity (McCarroll & Hamman, 2020). This study aims to analyse students' water literacy from two area in South Sumatera Indonesia, one area is from Semende which is subdistrict of Muara Enim with Indigenous Culture of water conservation and other students came from Palembang Districts which is at the same province with Semende districs, with a similar abundance of water but without Indigenous Culture. This study's samples were 439 respondents, consisting of 184 boys and 255 girls aged 11-18 years from junior and senior high school students in Palembang Municipality and Semende sub-districts of Muara Enim. There were 39 questions for measuring water literacy in the form of a Likert scale (1-5) to assess knowledge, attitude and behaviours in practical and living literacy. Social literacy was measured in the open-ended question instrument. Three of this water literacy was analysed descriptively. The results showed that practical water literacy in Semende and Palembang was significantly different but not with living water literacy. Besides, students' social water literacy in the Semende had two different answer patterns, while, in Palembang, it was more diverse with six different response patterns.
Analisis Pembentukan Karakter Enterpreneur bagi Siswa Sekolah Menengah dalam Perspektif Thomas Lickona
Authors: Sunaryo Agus , Hesti Hesti , Fauziati Endang , Harsono Harsono
Published: May 2023

Analisis pembentukan karakter enterpreneur dalam perspekstif Thomas Lickona merupakan penelitian kualitatif dengan pendekatan litertur review. Rendahnya jumlah lulusan Sekolah Menengah yang berminat menjadi enterprenuer dan tingginya angka pengangguran akan mempengaruhi pertumbuhan ekonomi. Sekolah mempunyai peran strategis dalam pembangunan ekonomi melalui pendidikan kewirausahaan. Pembentukan karakter wirausaha di sekolah selama ini masih mengintegrasikan pemahaman (cognitives), sikap (attitides), dan motivasi (motivations), serta karakter (behaviors) dan kapabilitas (skills). Penelitian dilakukan dengan menelaah Rencana Pelaksana Pembelajaran pada mata pelajaran Pendidikan Kewirausahaan di SMK Muhammadiyah Kutowinangu, SMAN Buluspesantren dan SMAN Pejagoan Kabupaten Kebumen. Dari hasil penelitian didapat bahwa : 1) Pembelajaran Kewirausahaan di Sekolah Menengah dalam perspesktif pendidikan karkater Thomas Lickona khususnya belum mengitegrasikan antara pemahaman (cognitives), sikap (attitides), dan motivasi (motivations), serta perilaku (behaviors) dan kapabilitas (skills). 2) Pendidikan Kewirausahaan di Sekolah Menengah selama ini belum mampu merubah pola pikir atau perubahan mindset peserta didik dari calon pekerja menjadi calon enterprenuer (pengusaha). 3) Perencanaan pembelajaran Kewirausahaan dapat dilakukan melalui ancangan/pendekatan, yakni; ancangan penanaman nilai (inculcation approach); ancangan perkembangan moral kognitif (cognitive moral development approach); ancangan analisis nilai (values analysis approach); ancangan klarifikasi nilai (values clarification approach); dan ancangan pembelajaran berbuat (action learning approach).
Perancangan Buku Latihan Menggambar Menggunakan Penggaris Putar
Authors: Maryani Dita , Iskandar Mochamad Rafel
Published: May 2023

Spirograph® is used to rotate repeatedly that can increase finger grips strength on a pencil, support coordinate eyes to hands and practice both of hand so that it is recommended to provide in children playground facilities. A similar tool like Spirograph® in Indonesia that already exist in ruler shape, or be known by penggaris putar, penggaris bunga or penggaris rotari. But in Indonesia however they haven't provided practice book to use this ruler. This study aims to design a drawing exercise book using a penggaris putar as a guide for teachers and parents when accompanying children to draw. The design of this book uses the Research and Development level 1 method, utilizes literature studies and produces designs for a number of 3 series of drawing practice books tittle are “Ayo menggambar dengan penggaris putar”.Keywords: Penggaris Putar; Spirograph®AbstrakSpirograph® penggunaannya dengan diputar secara berulang sehingga dapat meningkatkan kekuatan genggaman jari pada pensil, mendukung koordinasi mata-tangan dan melatih kedua tangan sehingga direkomendasi untuk disediakan di tempat fasilitas bermain anak. Alat serupa Spirograph® di Indonesia sudah ada dalam bentuk penggaris, dikenal dengan sebutan penggaris putar, penggaris bunga atau penggaris rotari. Namun di Indonesia belum tersedia buku latihan untuk menggunakan penggaris ini. Penelitian ini bertujuan untuk membuat rancangan buku latihan menggambar menggunakan penggaris putar sebagai panduan guru dan orang tua saat mendampingi anak menggambar. Perancangan buku ini menggunakan metode Research and Development    level 1, memanfaatkan studi literatur dan menghasilkan rancangan sejumlah 3 seri buku dengan judul “Ayo menggambar dengan penggaris putar”.Kata kunci: Penggaris Putar;Spirograph®”.
Evaluating Surface Water Quality Using Indexes of Water Quality and Plankton Diversity
Authors: Nguyen Thanh Giao , Huynh Nhien Thi Hong
Published: May 2023

The study aimed to assess the relationship between surface water quality and the diversity of planktonic communities in An Giang province, Vietnam. The national technical regulations on surface water quality, the water quality index (WQI), and the Shannon-Wiener diversity index (H') were applied to evaluate water quality. The considerable influence of water quality parameters on the dominant plankton was determined by canonical correspondence analysis (CCA) and similarity percentage analysis (SIMPER). The results showed that water quality was contaminated by organic matter, total suspended solids (TSS), and microorganisms. WQI values classified water quality as ranging from bad to good. The species composition of phytoplankton was dominated by two phyla, Chlorophyta and Bacillariophyta, and that of zooplankton was the Rotifera group. SIMPER analysis identified phytoplankton species with dominant density, including Melosira granulata, Pediastrum duplex, Anabaena sp., and Lyngbya circumcreta. Microcyclops varicans, Filinia longiseta, Trichocerca pusilla, Copepoda nauplius, Brachionus caudatus, and Polyarthra vulgarisdominated the density of zooplankton. Temperature, pH, TSS, ammonium, orthophosphate, and coliform considerably influence the dominant species composition of plankton. However, the indicators of diversity and composition of plankton were unable to completely reflect water quality. These findings could contribute to the indicator selection in developing the monitoring water quality programs. Doi: 10.28991/CEJ-2023-09-05-011 Full Text: PDF
Using FEM-AI Technique to Predict the Behavior of Strip Footing Rested on Undrained Clay Layer Improved with Replacement and Geo-Grid
Authors: Ebid Ahmed M. , Onyelowe Kennedy C. , Salah Mohamed , Adah Edward I.
Published: May 2023

The objective of this research is to predict how strip footings behave when rested on an undrained clay layer enhanced using a top replacement layer with and without a geo-grid. The study was conducted in several stages, including collecting load-settlement curves from "Finite Element Method" (FEM) models with different clay strengths, replacement thicknesses, and axial stiffnesses of the geo-grid. These curves were then idealized using a hyperbolic model, and the idealized hyperbolic parameters were predicted using three different AI techniques. According to the numerical results, the ultimate bearing pressure of pure clay models was found to be five times the undrained strength of the clay. These findings align with most established empirical bearing capacity formulas for undrained clays. The results also suggest that the initial modulus of the subgrade reaction is solely influenced by replacement thickness. Additionally, the enhancement in subgrade reaction due to the replacement layer decreases with increasing clay strength. However, the percentage of improvement decreased with higher clay strength. Moreover, the impact of the geo-grid was significant for settlement beyond 50mm, and it was more impactful in soft clay than in stiff clay. Finally, the research proposed predictive models employing the "Genetic Programming" (GP), "Artificial Neural Networks" (ANN), and "Evolutionary Polynomial Regression" (EPR) techniques, and these models exhibited an accuracy of about 88%. Doi: 10.28991/CEJ-2023-09-05-014 Full Text: PDF
The Behavior of Dredged Soil-Shredded Rubber Embankment Stabilized with Natural Minerals as a Road Foundation Layer
Authors: Utama Komang A. , Harianto Tri , Muhiddin A. B. , Arsyad Ardy
Published: May 2023

Recently, geotechnical studies have been conducted more progressively to utilize dredged soil. The inclusion of shredded rubber (SR) and natural minerals (NM) to stabilize dredged soil (DS) has become an exciting issue in the geotechnical field. This technique can be a promising environmental innovation for the future. This study aimed to investigate the unconfined compressive strength (UCS), California bearing ratio (CBR), and embankment performance under the strip footing test. The UCS sample was prepared using shredded rubber with a proportion of 2% and 3% and natural minerals with a proportion of 3%, 6%, 9%, and 12% from the dry weight of the soil. Whereas for the CBR samples (both in un-soaked and soaked conditions) were also prepared with a proportion of 2% and 3% shredded rubber and 6% and 9% natural minerals from the dry weight of the soil as well. The strip footing test was conducted in small-scale laboratory tests to evaluate the performance of stabilized dredged soil embankments. The applied load test was gradually increased until the embankment collapsed. The results showed that adding shredded rubber and natural minerals could increase the UCS value by 3–4 times and the CBR value by 2–3 times. Furthermore, 84% and 116% efficient results were obtained in the strip footing test for the 7 and 14 days of curing, respectively. Therefore, the utilization of dredged soil stabilized with SR and NM can be considered for use as a road foundation layer. Doi: 10.28991/CEJ-2023-09-05-016 Full Text: PDF
Applying the Porosity-to-Cement Index for Estimating the Mechanical Strength, Durability, and Microstructure of Artificially Cemented Soil
Authors: Arrieta-Baldovino Jair , Izzo Ronaldo , Millan-Paramo Carlos
Published: May 2023

Fine, expansive, and problematic soils cannot be used in fills or paving layers. Through additions to these soils, they can be converted into technically usable materials in civil construction. One methodology to make them viable for construction is through a stabilization process. Nevertheless, current methodologies regarding dosage based on compaction effort and the volumetric amount of binder used are unclear. Thus, this research describes cement-stabilized sedimentary silt's strength and durability properties from Curitiba (Brazil) for future application in paving. Splitting tensile strength, unconfined compressive strength, and loss of mass against wetting and drying cycles (W-D) were investigated in the laboratory utilizing greenish-gray silt (originating from one of the Guabirotuba Formation layers, Paraná) and high-early strength Portland cement- ARI (CPV). Utilized were cement concentrations (C) of 3, 5, 7, and 9%, molding dry unit weights (d) of 14, 15, and 16 kN/m3, curing periods (t) of 7, 14, and 28 days, and constant moisture content (w) of 23%. With an increase in cement concentration and curing time, the compacted mixes demonstrate an increase in strength, an improvement in microstructure, and a decrease in accumulated mass loss (ALM) and initial porosity (η). Using the porosity/volumetric cement content ratio (η/Civ), the lowest amount of cement required to stabilize the soil in terms of strength and durability was determined. The porosity/cement index provided an appropriate parameter for modeling the mechanical and durability properties, and a unique equation between the strength/accumulated loss of mass and the porosity/binder index was obtained for the curing times studied. Lastly, C = 5% by weight is the minimum acceptable amount for prospective subbase soil application. Doi: 10.28991/CEJ-2023-09-05-02 Full Text: PDF
Fire Resistance Analysis of Two-Way Reinforced Concrete Slabs
Authors: Salihu Fidan , Guri Zijadin , Cvetkovska Meri , Pllana Fatos
Published: May 2023

This paper presents a fire resistance analysis of two-way reinforced concrete (RC) slabs. The study analyzes the effect of specific parameters—concrete cover thickness, span, and support conditions—on the fire resistance of the slabs. To that end, the slabs were exposed to Standard Fire ISO 834, and the 3D nonlinear numerical analyses were conducted in SAFIR2016. The results of the numerical analyses were evaluated against experimental results reported in the literature. The agreement between the two sets of results was satisfactory throughout the fire test. Nonetheless, to verify the obtained numerical results, all testing-related parameters must comply with the numerical simulation results. This comparison demonstrated the usefulness of numerical simulations in predicting the behavior of structures in fire conditions. In addition to the nonlinear numerical analysis, the fire resistance was calculated using the simplified method and tabulated data described in Eurocode 2 (Part 1.2) to assess the accuracy and reliability of fire safety regulations in the design of two-way slabs and identify significant differences between the design code and numerical analysis. The comparison showed that SAFIR2016 provides more accurate results by considering additional factors, such as tensile membrane forces, which increase the fire resistance of two-way slabs. According to the load-bearing criteria, the two-way slabs have high fire resistance, considerably higher than prescribed in the fire safety regulations, which ignore the positive effect of tensile membrane forces. According to the numerical analysis, the upper reinforcement in the compression areas of the slab's span was considered, which increased the fire resistance of the slabs. In contrast, according to the design codes, the contribution of this reinforcement is neglected. It was indicated that the increased concrete cover improves the fire resistance of the slabs. The vertical displacements increase by increasing the slab span, but according to the load-bearing criteria, all the slabs show fire resistance of over ten hours. In terms of bearing capacity, slabs with various support conditions show fire resistance of longer than ten hours. In terms of deflections, the supporting conditions of the slabs have a significant influence on their behavior. This study provides valuable insights into the fire resistance of two-way RC slabs and highlights the importance of considering specific parameters in the analysis. Doi: 10.28991/CEJ-2023-09-05-05 Full Text: PDF
Neutralization of Acidity (pH) and Reduction of Total Suspended Solids (TSS) by Solar-Powered Electrocoagulation System
Authors: Fikri Elanda , Sulistiawan Irfan A. , Riyanto Agus , Eka Saputra Aditiyana
Published: May 2023

This study investigates the effect of electrocoagulation contact time on the pH and TSS of wastewater discharged from the wastewater treatment plant (WWTP) of the Psychiatric Hospital of West Java Province. The experiment followed the pretest-posttest control group design. This study involved testing 56 wastewater samples six times before and after treatment. Each treatment was repeated four times, and there was one control group for each repetition. The electrocoagulation tool used in this study consisted of six 1-mm electrode plates that were 8 cm apart, a current strength of 5A, a voltage of 12V, and a 50-Watt solar panel. The data were analyzed using descriptive and inferential statistics. The results showed that all electrocoagulation contact time treatments had a significant effect on increasing the pH and the TSS. Additionally, the electrocoagulation tool was found to be effective, stable, portable, and environmentally friendly, with a self-cleaning system that reduced operational costs and saved electricity through the use of solar panels. This study contributes to the development of an effective electrocoagulation toll for wastewater treatment and the determination of the optimal contact time for the tool, providing a practical solution to overcome the problems of pH and TSS in wastewater. These findings can be applied to other wastewater treatment plants, thus improving the quality of discharged wastewater. Doi: 10.28991/CEJ-2023-09-05-09 Full Text: PDF
Richard de Bury (1344) to Charles Lyell (1830). The use of term ‘Geology’ revisited
Authors: García-Cruz Cándido Manuel
Published: May 2023

The first reference about the use of the term geology is found in Richard de Bury, in the mid-fourteenth century, although he did not define it. This word has been used over almost five hundred years by numerous authors, including U. Aldrovandi (1603), M. P. Escholt (1657), R. Lovell (1661), F. Sessa (1687), E. Warren (1690), D. Clüver (1700), B. Martin (1735), J.-A. de Luc (1778), and H. B. de Saussure (1779), without fully specifying its meaning, with a great vagueness as a concept, and without clearly defining its subject matter: Geology as some book titles, or ideas such as on what is dug out of the earth, discourse concerning the earth, general doctrine of the earth, or science of continents, were duly neither developed nor explained by the authors. Among the fathers of geology as a science, according to their works contents, an implicit meaning is found in G. Arduino (1760) and J. Hutton (1795), and also in other naturalists as B. Faujas de Saint-Fond (1803). In the first decades of the nineteenth century, S. Breislak (1811) and W. Phillips (1815) defined the descriptive, historical and explanatory aspects of geology, and C. Lyell (1830) laid down accurately the scope and aim of geology as a historical science, with a methodology based on Actualism-Uniformitarianism La primera referencia que hay sobre el uso del término geología se encuentra en Richard de Bury, a mediados del siglo XIV, aunque no llegó a definirla. A lo largo de casi quinientos años, numerosos autores han utilizado este vocablo, entre ellos U. Aldrovandi (1603), M. P. Escholt (1657), R. Lovell (1661), F. Sessa (1687), E. Warren (1690), D. Clüver (1700), B. Martin (1735), J.-A. de Luc (1778), o H. B. de Saussure (1779), sin precisar totalmente su significado, con una gran vaguedad conceptual y sin definir claramente su materia de estudio: Geología como título de algunas obras, o ideas como sobre lo excavado de la tierra, discurso sobre la tierra, doctrina general del globo, o ciencia de los continentes, no fueron desarrolladas o explicadas adecuadamente por sus autores. Entre los padres de la geología como ciencia, un significado implícito de acuerdo con el contenido de sus obras se encuentra en G. Arduino (1760) y J. Hutton (1795), así como en otros naturalistas como B. Faujas de Saint-Fond (1803). En las primeras décadas del siglo XIX, S. Breislak (1811) y W. Phillips (1815) definieron los aspectos descriptivo, histórico y explicativo de la geología, y años más tarde C. Lyell (1830) estableció con precisión el alcance de la geología como ciencia histórica, con una metodología basada en el Actualismo-Uniformitarismo
OPTIMASI TUNING PID TEMPERATURE CONTROL PADA ALAT HEATER 2801E101 DENGAN MENGGUNAKAN HYSYS INTERFACING MATLAB
Authors: Effendi Mulia , ZA Nasrul , Muhammad Muhammad , Hakim Lukman , Ginting Zainuddin , Hasfita Fikri
Published: May 2023

Penelitian Sistem kontrol Proportional, Integral dan Derivative (PID) merupakan kontroller untuk menentukan presisi suatu sistem instrumentasi dengan karakteristik adanya umpan balik pada sistem tersebut (Feed back). Penukar panas adalah alat yang memungkinkan perpindahan panas dan bisa berfungsi sebagai pemanas maupun sebagai pendingin. Adapun metodologi penelitian ini adalah membuat model steady state Heater, kemudian mengubah model steady state menjadi model dynamic, lalu membuat model kontrol PID, setelah itu melakukan tuning terhadap kontrol PID dan melakukan pengujian terhadap kontrol PID, dengan melakukan gangguan pada set point. Tujuan penelitian ini adalah untuk mendapatkan waktu respon tercepat terhadap gangguan pada termperature serta mendapatkan variable Kc, Ti dan Td terbaik. Hasil dari pengaplikasian sistem kontrol PID maka didapatkan waktu tercepat yaitu 0.83 menit dengan nilai Kc= 1,79, Ti= 1,15 dan Td=0,19. Pada suhu 90oC dengan tekanan 277,7 kPa dengan laju alir 9363 kg/jam. Sedangkan waktu terlama pada hasil pengujian kontrol PID dengan mengubah termperature menjadi 98oC , yaitu 1menit dengan nilai Kc= 1,85, nilai Ti=1,15 dan Td= 0,19.
PEMANFAATAN LIMBAH KULIT NANAS MENJADI BIOETANOL DENGAN MENGGUNAKAN RAGI (SACCHAROMYCES CEREVISIAE)
Authors: Rahmi Delfi , Zulnazri Zulnazri , Dewi Rozanna , Sylvia Novi , Bahri Syamsul
Published: May 2023

Bioetanol pada dasarnya adalah etanol atau senyawa alkohol yang diperoleh melalui proses fermentasi biomassa dengan bantuan mikroorganisme. Pembuatan bioetanol dapat dilakukan terhadap tanaman berpati atau yang mengandung karbohidrat, glukosa dan selulosa. Salah satunya adalah kulit nanas. Penggunaan kulit nanas dapat menambah ragam bahan dasar pembuatan bioetanol yang ekonomis dan mudah diperoleh. Penelitian ini bertujuan untuk membuat bioetanol dari kulit buah nanas dengan variasi dari penambahan massa Saccharomyces cereviceae dan waktu fermentasi. Penelitian ini sudah dilakukan sebelumnya, tetapi dengan menggunakan variasi berat urea dan NPK yang berbeda, sedangkan pada penelitian ini mengggunakan variasi berat urea yang berbeda akan tetapi berat NPK yang sama. Metode penelitian menggunakan cara fermentasi dan distilasi dengan variasi waktu fermentasi 3, 6, 9 dan 12 hari. Hasil dari penelitian ini didapatkan yield bioetanol tertinggi 3,398%, densitas bioetanol tertinggi 0,8276 gr/ml, viskositas tertinggi adalah 1,12 cP dan uji gas chromatography (GC) adalah 38,492% pada waktu fermentasi 9 hari.
MILITARY BASED LANDMINE DETECTION ROBOTIC VEHICLE
Authors: K. Nandakumar , R. Kesavan , N. Niyasudeen , M. Surendra Prasad , Y. Vaseem Akram
Published: May 2023

A landmine is an explosive device which is concealed under the soil to destroy the enemy targets such as soldier, vehicle, tanks etc. Landmines in India are mostly planted in fields, forest, wells, water resources and energy production areas. The process of removing land mines from a soil is called Demining or mine clearance. In military operations, the deminig is done with help of the devices such as mine plows and blast waves. Sometimes specially trained animals also involved in the process of mine clearance. These existing method requires a lot of time to remove the landmine and which also involves loss of many lives during the demining process. To avoid the hazard the landmine detection robot is proposed which uses a ultrasonic sensor, metal detector and GSM module as a complementary tool for landmine detection. The robot is used to detects the position of the landmine and sends its GPS position to a web server through GSM.
Physical and Chemical Evaluation of Rice Bran with Various Level of Husk Addition
Authors: Maesaroh Eneh ,   Departemen Ilmu Nutrisi dan Teknologi Pakan, Fakultas Peternakan, IPB University, Martin Rima , Jayanegara Anuraga , Aminingsih Tri , Nahrowi Nahrowi ,   Program Studi Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pakuan
Published: May 2023

The aim of this research was to analyze the physical and chemical properties of rice bran with husk addition. The percentage of husk addition was 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100%. Husks were grounded and mixed with rice bran homogeneously. The mixture was analyzed for physical properties, proximate analysis and van Soest analysis. The variables in this study included visualization of husk addition in rice bran, specific gravity (SG), bulk density (BD), moisture content (MC), ash, crude protein (CP), ether extract (EE), crude fiber (CF), acid detergent fiber (ADF), cellulose and lignin. Data were presented descriptively and the correlation between each variable was conducted. The results showed that there were differences in visualization in each level of husk addition in rice bran. The addition of husks in rice bran increased the ash (Δ = 11.89), CF (Δ = 22.75), ADF (Δ = 47.23), cellulose (Δ = 24.04) and lignin (Δ = 7, 40). The decrease in SG, BD, MC, CP and EE in mixing rice bran and husk were Δ = 0.62; 62.85; 3.64; 5.73 and 9.21 respectively. The correlation between the physical properties and the chemical properties showed significant correlation (p<0.01). The addition of husks to rice bran affected the physical and chemical qualities.
Kapasitas Usaha Perempuan Pengolah Hasil Pertanian Berbasis Kedelai dan Faktor Karakteristik Personal yang Mempengaruhinya (Studi Kasus Di Kota Mataram)
Authors: Hayati Hayati
Published: May 2023

The purpose of this study is to analyze: The production capacity of women who carry out activities of processing agricultural products made from soybeans and the personal characteristics that influence them in the city of Mataram. Three sub-districts with a total of 6 sub-districts were selected as locations for data collection, namely Sandubaya sub-district (Abian Badan Baru Village area), Sekarbela (Karang Pule and Kekalik Jaya Sub-district areas), and Selaparang (Monjok and Monjok Timur Sub-Districts) considering the large number of processing businesses with raw materials. soya bean. A total of 60 respondents were interviewed using a survey approach to obtain information. The data obtained was then processed using both descriptive and inferential statistics using Pearson's correlation, and different ANOVA testing. The results of data processing indicate that the business capacity of women who carry out production activities of soybean-based agricultural products is included in the very high class, and the factors that are thought to influence women's ability to process soybean-based agricultural products in this study are personal characteristics: non-formal education, length of business, motivation to try, access to information, participation in groups).
Identificação de Fungos anemófilos em uma cooperativa de materiais recicláveis na cidade de Petrolina-PE
Authors:   , Macedo Esdras Santos , Svedese Virgínia Michelle
Published: May 2023

Os fungos estão amplamente distribuídos na natureza e quando essa disseminação ocorre por meio do ar, eles são chamados de fungos anemófilos ou fungos alérgicos, no qual os esporos são alérgenos do ar, causam manifestações respiratórias e podem ter características oportunistas. Os catadores de materiais recicláveis, principais agentes da coleta seletiva, enfrentam condições e ambientes de trabalho precários. A exposição à poluição do ar na forma de fungos, bactérias e metais tóxicos também é fonte de doenças para os catadores de lixo. Dessa maneira, este trabalho visa coletar e identificar os principais gêneros de fungos aero alérgenos presentes em uma cooperativa de materiais recicláveis tendo em vista que tais ambientes quando se encontram em condições precárias, podem se tornar hostis para a comunidade catadora de material reciclável, sendo propícia proliferação de agentes patogênicos, dentre eles fungos anemófilos. Para a coleta de fungos anemófilos, foi utilizada a técnica de sedimentação de esporos, que consiste na exposição de placas de Petri contendo meio de cultivo a altura de 1,2 m a partir do solo por 15 min. Após constatação de crescimento fúngico nas placas, foi realizada a análise quantitativa por meio da contagem do número de UFC, diferenciando-as em leveduriformes e filamentosas. As amostras coletadas no ambiente da Cooperativa receberam o devido acondicionamento, no qual ficou em observação num período de 4 a 7 dias. Após o crescimento das colônias, os gêneros foram identificados com base na literatura de apoio, utilizando as características macro e microscópicas. Foram quantificadas as UFC dos seis quadrantes avaliados: 1º Sala de lixo Eletrônico (365,94 UFC/m³), 2º Escritório (301,93 UFC/m³), 3º Banheiro Feminino (188,41 UFC/m³), 4º Banheiro Masculino (177,54 UFC/m³), 5º Cozinha (194,20 UFC/m³) e o 6º Corredor ? externo (468,94 UFC/m³). Ao todo foram identificados nove gêneros de fungos filamentosos: Cladosporium sp. (23,89%), Mycelia sterilia (17,70%), Aspergillus sp. (14,75%), Penicillium sp. (13,27%) e Fusarium sp. (7,08%), Rhizopus sp. (3,54%), Trichoderma sp. (3,24%), Paecilomyces sp. (2,95%) e Curvularia sp. (1,77%). As leveduras não foram identificadas, mas foram quantificadas, obtendo uma frequência de 11,80%. Os ambientes avaliados da cooperativa estão dentro dos parâmetros determinados pela Resolução Nº 09 DE 2003 da ANVISA. Contudo, considerando o caráter oportunista de alguns gêneros encontrados, se faz necessário uma atenção para a incidência dessas agentes, a fim de mitigar a presença desses nos ambientes de uso comum dos catadores de material reciclável.
The impact of community-based pulmonary rehabilitation on the health and lives of migrant workers with pneumoconiosis in China: a qualitative study exploring patient experience
Authors: Ma Panpan , Nagamatsu Yasuko
Published: May 2023

Background

Globally, China has the highest prevalence and incidence of pneumoconiosis, which mainly occurs among migrant workers employed in dusty work environments. Pulmonary rehabilitation (PR) is recommended as the most effective therapeutic strategy in managing chronic obstructive pulmonary disease, and recent quantitative studies have validated PR’s effect on the health outcomes of patients with pneumoconiosis. However, qualitative evidence regarding PR’s impact on pneumoconiosis patients’ health and lives is lacking in the literature. Therefore, this study aimed to address this knowledge gap by exploring the experience of pneumoconiosis patients in community-based PR (CBPR).

Methods

A qualitative study based on the phenomenological perspective was conducted. The convenience　sampling method was used to recruit pneumoconiosis patients attending a CBPR program supported by a patient advocacy non-governmental organisation. Web-based semi-structured interviews were conducted using a self-made interview guide. Thematic analysis was performed to analyse the interview data. This study was conducted after gaining ethical approval and informed consent from all participants.

Results

Fifteen migrant workers with pneumoconiosis patients aged 49 to 71 years old (median: 54 years old) participated in this study. Four themes were identified from the interview data: triggering of a difficult life, reconstruction of life, sense of empowerment, and gaps in PR. Pneumoconiosis severely impaired participants’ well-being, and it triggered heavy financial strain and care burden in their families. The CBPR program allowed them to restore their physical and psychosocial health, and they achieved reconstructing their lives by leading a PR-centred life. Participating in the CBPR program, pneumoconiosis patients recognised multiple supports and were empowered with enhanced disease-coping abilities and strengthened hope to survive. Overall, participants reflected on their positive experience in the CBPR program, despite their unmet needs and existing barriers in PR.

Conclusions

The CBPR program integrating multiple supports empowered the vulnerable migrant workers with pneumoconiosis and facilitated their health transition and life reconstruction experience. To optimise their PR experience and improve their QoL, health service addressing their unmet needs and barriers in PR is needed. PR for pneumoconiosis patients with different sociodemographic characteristics and family-oriented management of pneumoconiosis should be explored in future research.