bluuebunny/crossref_metadata_2025 huggingface dataset:
Online Media News Strategy On Vaccination Discourse: Theo Van Leeuwun’s Critical Discourse Analysis
Authors: Iskandar Denni , Wildan Wildan , Nurrahmah Nurrahmah , Fauzi Muhammad
Published: July 2023

The vaccination discourse is one of the discourses that is always reported by the mass media because of the increasing cases of Covid-19. News about vaccinations elicited various responses from the public. This study aimed to examine the strategy of online media news related to the vaccination discourse that had resulted in various public responses. The research was conducted using Theo van Leeuwen’s theory on critical discourse analysis. Four online media consisting of KOMPAS.com, detik.com, Liputan6.com, and Tribunnews.com were chosen as data sources for this research. This study uses a qualitative method. Data in the form of phrases, clauses, and sentences were collected through reading and note-taking techniques. Then, the data were analyzed using a qualitative descriptive approach. The research results showed that the online media of KOMPAS.com, detik.com, Liputan6.com, and Tribunnews.com used exclusion and inclusion strategies in producing news discourse.  However, KOMPAS.com and detik.com online media tended to use exclusion strategies that included passivation, nominalization, and substitute clauses. Furthermore, Liputan6.com and Tribunnews.com online media tended to use inclusion strategies such as nomination-categorization, nomination-identification, and differentiation-indifference. Commonly, in this vaccination discourse, the news written by these four online media were not over-criticizing the government but more emphasized driving opinions concerning various public responses  to vaccination. These findings suggest readers to read information in the mass media critically. Thus, readers are not easily influenced by the conflicts that are reported
Literary Works Empowering Social Movements: A Doll's House & Bumi Manusia Analysis in Norwegian-Indonesian Feminism
Authors: Susanti R. Hariyani
Published: July 2023

This article explores the role that literature plays in social movements, particularly in the gender equality movement such as women’s autonomy in social settings. By comparing two literary works, A Doll’s House by Henrik Ibsen and Bumi Manusia by Pramoedya Ananta Toer, the article investigates the impact of literature on the first wave of the feminist movement in Norway in 1879 and the portrayal of women's conditions in Indonesia at the time. The research employed qualitative research methods such as content analysis and discourse analysis, as well as comparative analysis of the two literary works. The research found that A Doll’s House played a significant role in the Norwegian feminist movement and gave women confidence and the awareness that they were not merely puppets for men, but human beings whose voices needed to be heard. Similarly, Bumi Manusia showed resistance and awareness of the oppression faced by Indonesian women, highlighting the role of literature in promoting equality movements. These important literary works demonstrate the power of literature in documenting, retelling, and raising awareness of people's stories, ultimately reaching a larger audience.
Self-Publishing, Vanity Publishing and Indie Publishing: A Shortcut to Fame or A Dangerous Game?
Authors: Hartiningtyas Widjati
Published: July 2023

In November 2022, a Twitter account reported fraud committed by an owner of a well-known vanity publisher. The post that was retweeted thousand times revealed that many authors experience the same thing. Based on that case, this study analyzed reasons that drive authors to self-publish or use vanity and indie publishing service. To answer the research question, the researcher conducted semi-structured interviews with five authors acting as informants. The researcher presents the interview's results in three categories: the romanticism of publishing printed books, idealism in writing, and the prestige of indie publishing. The researcher analyzes the data using Michael Foucault's thoughts in his essay What is an author? This study found that though the informants used alternative publishing because conventional publishers did not accept their works, they had different reasons to continue using alternative publishing. The informants agreed that alternative publishing offers flexibility that enables them to maintain their idealism. However, the informants had different opinions on the classic conflict between idealism and income. The informants do not consider indie publishing more prestigious than conventional publishers or vice versa. However, they have their considerations when choosing a type of publisher. The interviews also showed that a supporting community, a valuable network, and pieces of information are necessary before using alternative publishing.
Common Errors Found in the Diverse Kinds of Paragraphs Composed by First Year EFL University Students
Authors: Tustiawati Ida Ayu Mela
Published: July 2023

The present study aims at showing the major types of errors that students make in their written products and their perspectives on the cause of errors that they make. In this research, 180 students’ paragraphs were analysed for the purpose of error analysis and a questionnaire was distributed to the students to find out their perspectives on the cause of errors that they made. The errors found in the students’ written products were first categorised into several major categories, then further classified into four general categories: morphological, lexical, syntactical, and mechanical. The findings show that there were 12 major errors that the students made in their writing. Seven of them fall under the category of morphological, two under lexical, one under syntactical and another two under mechanical.  The majority of students are aware that they make errors in their writing but find it hard to allocate them. As a result, they may not be able to correct or avoid the errors. Thus, incorporating error analysis in teaching and learning is a necessary practice for students to minimise the production of errors in their writing. Furthermore, lack of understanding of grammatical functions and limited knowledge of vocabulary are considered the major causes of errors based on the perspectives of the students. Through the classification system provided by the error analysis procedure, teachers are able to address this issue by incorporating smaller groupings of errors into the curriculum and teaching program
Metacognitive, Cognitive, and Socio-Affective Strategies Used By English First Language Students in Academic Listening Course
Authors: Awinindia Sweethsy
Published: July 2023

Listening has an essential role in the language learning process. The success or failure of language learning is influenced by how students use the strategies. However, sometimes students still find it difficult to choose appropriate listening strategies. Therefore, listening strategies are crucial for the learning process in English as a foreign language context. This study aimed to investigate the learning strategies used by the English Language Education Program students in the Academic Listening course. The study was conducted in the first semester, 2022/2023 academic year. By using qualitative methods, the researchers employed close-ended and open-ended questionnaires and semi-structured interview protocols to collect the data. The participants were thirty seven students of batch 2021 who have taken the Academic Listening course. The findings showed that the students used metacognitive, cognitive, and socio-affective strategies. In metacognitive, they tended to make plans before study, paid attention to the speakers, and learned from previous mistakes. Students also used dictionaries and glossaries to define the meaning of unfamiliar words, took notes, and summarized cognitive strategies. Then, they tended to relax and practiced English with others in socio-affective strategies. The study hopefully can increase Academic Listening students' awareness of listening strategies that can help them during the learning process. Moreover, it is hoped to be useful for lecturers who want to teach Academic Listening and support students’ listening strategies.
Face Maintenance Rituals and Communication Strategies Used in Puja Astawa’s YouTube Videos
Authors: Mulyana Novita , Qomariana Yana
Published: July 2023

YouTube, a video sharing platform, is famously used these days, not only due to its function as part of entertainment, but also a media of interaction. Unlike, face-to-face interaction or other computer-mediated interaction, YouTube served multi-party interaction and three levels of communication. Its uniqueness leads to questions on whether people engaged in this interaction manage maintaining their interlocutor’s face and what communication strategies are used amid this multi-party interaction considering it may involve people from different social and cultural background. This qualitative research was aimed to analyse the first level communication in YouTube videos by using interactional sociolinguistics approach in order to figure out the types of face maintenance rituals as well as the communication strategies used by the participants in YouTube videos. The data source of the study was Puja Astawa’s YouTube videos, one of the most popular content creators in Bali. In collecting the data, documentation method and note taking technique were used. The data were further analysed using the face maintenance theory proposed by Goffman and communication strategies proposed by Canale and Swain. The result of the analysis shows that presentational rituals is the main rituals used by the participants in Puja Astawa’s YouTube videos. In terms of communication strategies, there are three strategies found, namely (1) code switching, (2) repetition, (3) the use of Balinese particles. Code switching is the mostly used strategy while the use of Balinese particles is the least used strategy.
The Relationship Between Student’s Habit of Watching English YouTube Content and Vocabulary Mastery
Authors: Maulidiyah Rahmi , Agustina Sheila , Umam Khoirul
Published: July 2023

Vocabulary mastery is a crucial skill for English language learners. It will be much simpler for students to communicate verbally and in writing if they have a strong command of the English language's vocabulary. Considering this issue, this research aims to investigate the correlation between how often Senior High School students watch English content on YouTube and how well they know their vocabulary. In this research, the method is quantitative and the design is a correlation. This research population was eleventh graders of a Senior High School in Sidoarjo, while the sample was 45 students majoring in science. The first data collection instrument was a questionnaire used to collect data on student habit of watching English YouTube content. The second instrument was a vocabulary test used to collect data on students’ vocabulary mastery. Both results of data collection were analyzed and calculated using Microsoft Excel 2013 and SPSS version 26. This research found that the r-count was higher than the r-table. The r-count was 0.528 while the r-table was 0.294. It indicated a significant correlation between the two variables. The more often the students watch English YouTube content, the greater their vocabulary mastery. Then, H1 is accepted and H0 is rejected.
Rhetorical Moves of Research Article Abstracts Written by American and Indonesian Authors : Comparative Study
Authors: Karimah Nur Alfin , Munir Ahmad , Anam Syafiul
Published: July 2023

As an indispensable part of the Research Article (RA), an abstract should be well written. The variability of information included in a research article abstract will likely vary because of different discourses among academicians worldwide.  This paper compares the rhetorical moves manifested in research article abstracts written by American and Indonesian authors published in two reputable journals. Data presented are move sequences of 25 Research Article (RA) abstracts from the latest six years issue (2022-2016). The abstracts were selected from a particular discipline, English language teaching and learning, to control the variability. Each move was identified based on the lexical used. The findings revealed that Move 1-Move 2-Move 3-Move 4-Move 5 and Move 2-Move 3-Move 4-Move 5 were the most salient move patterns found in both groups. Interestingly, abstracts of American authors showed cyclicity patterns and had an additional Move. Move 3 and Move 4 were considered as obligatory Moves, while Move 1 and Move 5 could be positioned as optional Moves. The study also found that American and Indonesian authors' writing styles differed. The implication of this study is expected to strengthen the theory of rhetorical moves in the literature. Also, it can be scientific evidence for Indonesian scholars to get a reference of how native academicians write their abstracts in reputable international journals
Conceptualization of Metaphor at the Discourse of the Bali G20 Summit in Online Mass Media: Cognitive Semantic
Authors: Nurhidayati Siti Ayu , Mulyadi Mulyadi
Published: July 2023

This study discusses the conceptualization of metaphors in the discourse of the Bali G20 Summit using cognitive semantic theory. The purpose of this study is to explore and analyze the types and meanings of metaphors and create a semantic network to see the relationship of meanings with one another. This research is included in the descriptive qualitative research. The source of metaphor data comes from online mass media. The method used in data collection is the simak method, with the note-taking technique as the primary technique, and the data analysis method uses the distribution method with advanced techniques for natural elements (BUL). The results showed three types of metaphors, namely three structural, two orientational, and five ontological metaphors. Based on the metaphorical mapping between the source domain and the target domain of the image scheme, namely the identity of the suitability feature matching; space with features Up-Down, Front-Back, Left-Right, Near-far, Center-Periphery, Contact; force strength with the characteristics of balance, state of existence characteristic of an object, cycle, and process, limited space bounded space. Cognitive roles influence the conceptualization of metaphors in the discourse of the Bali G20 Summit. The meaning of the metaphor is reflected based on different thoughts and experiences in the context of the sentence. The linkage of meaning between one meaning and another can be connected through synonymous meaning relations in a semantic network.
نحو تَحَوُّل النظم الغذائية للأسرة العربية لمواجهة أزمة القمح المقبلة
Authors: Eltijani Abbas Wijdan
Published: July 2023

يمكن أن تُؤَدِّي السياسات الشاملة، التي تستهدف التغييرات السلوكية في الأنماط الغذائية للأسرة العربية، إلى تَحَوُّلِ النُّظُمِ الغذائيةِ لما يُمَكِّن من مواجهة الأزمات الغذائية المستقبلية، بما يضمن صحة الإنسان والبيئة.
وتهدف الورقة إلى إبراز الدور، الذي يمكن أن يُمَارِسَهُ التحول في النظم الغذائية للأسرة العربية، في مواجهة الأزمات الغذائية المستقبلية المتوقعة وفقًا لتقرير الأمم المتحدة “حالة الأمن الغذائي والتغذية في العالم” الصادر في عام 2021، إضافة إلى ما تحمله الحرب الروسية على أوكرانيا من نُذُرِ أزمةِ قمحٍ عالميةٍ مُقْبِلةٍ.
والورقة تستهدف مُتَّخِذِي القرار في الشأن الثقافي والاجتماعي والاقتصادي المَعْنِيِّين ببناء السياسات وإقرارها؛ لإعادة تشكيل الوعي وتغيير الثقافة الغذائية للأسرة العربية، وما يتطلبه ذلك من توصيات من خلال تحليل التقرير في ضوء طبيعة الثقافة الغذائية للأسرة العربية، وما ارتبط بها من ممارسات غذائية كمية ونوعية، عبر عدة عوامل ديموغرافية واقتصادية واجتماعية، وما نتج عنها من أنماط غذائية مختلفة، ومردود ذلك على حالة التغذية الآنية والأمن الغذائي المستقبلي.
Hemodiyaliz Hastalarında Yaşam Kalitesi ile Depresyonun Değerlendirilmesi ve Aralarındaki İlişkinin İncelenmesi
Authors: TURGUT Meryem , FİDAN Cuma , IŞIKÇELİK Ferda , AĞIRBAŞ İsmail
Published: July 2023

Çalışmada, hemodiyaliz tedavisi alan hastaların yaşam kalitesi ve depresyon düzeylerini, bunları etkileyen faktörleri belirlemek ve hastaların yaşam kalitesi ve depresyon düzeyleri arasındaki ilişkiyi incelemek amaçlanmıştır. Araştırma, tanımlayıcı ve kesitsel türde bir çalışmadır. Araştırma, Muş Devlet Hastanesi’nde hemodiyaliz tedavisi alan 92 hasta ile gerçekleştirilmiştir. Çalışmada veri toplama araçları olarak Böbrek Hastalığı ve Yaşam Kalitesi Formu ve Beck Depresyon Ölçeği kullanılmıştır. Çalışmada verilerin analizinde betimleyici istatistikler, Mann-Whitney U ve Kruskal Wallis testlerinden ve korelasyon analizinden yararlanılmıştır. Çalışmada hemodiyaliz hastalarının toplam yaşam kalitesi puanı 46.65±10.81; depresyon puan ortalaması ise 14,16±6,08 olarak bulunmuştur. Hastaların orta düzeyin altında yaşam kalitesi puanına sahip oldukları ve hastaların %31,52’sinde depresyon puan ortalamasının Türkiye için belirlenen kesme puanının üzerinde olduğu saptanmıştır. Çalışmada, hemodiyaliz hastalarının cinsiyet, yaş ve eşlik eden hastalık olma durumu özelliklerinin hem yaşam kalitesi ve hem de depresyon düzeyleri üzerinde; medeni durum ve hastalıktan önce çalışma durumu özelliklerinin ise sadece yaşam kalitesi üzerinde istatistiksel olarak anlamlı bir farklılık oluşturduğu tespit edilmiştir. Çalışmada, depresyon ile toplam yaşam kalitesi ve tüm alt boyutları arasında istatistiksel açıdan anlamlı ve negatif yönlü ilişkiler olduğu sonucuna ulaşılmıştır. Gelecekteki araştırmalarda, kronik böbrek yetmezliği hastalığının farklı tedavi yöntemlerinde, hastalardaki depresyonun erken teşhisi ve tedavisinin, hastaların yaşam kalitesini iyileştirmeye yardımcı olup olmayacağı değerlendirilebilir.
Bir Disiplin Dili Oluşturmak: ‘Yönetim ve Organizasyon’ Disiplininin Dilsel Gelişimine İlişkin Bir İnceleme
Authors: COŞKUN Recai
Published: July 2023

Bu çalışmada, 1950’lerden 1980’lere Yönetim ve Organizasyon disiplinin dilsel gelişimi seçilmiş ders kitaplarının belge çözümlemesine tabi tutulması yoluyla incelenmiştir. Farklı kurumları temsil eden yazarların farklı tarihlerde basılmış eserlerindeki dillerinin zamanla değişim gösterip göstermediği sorgulanmıştır. Yapılan çözümlemelerde yazarların özellikle 1950’lerde ve 1960’larda hem İşletme Alanının hem de Yönetim ve Organizasyon disiplini dilinin oluşturulmasında iki meydan okumayla karşılaştıkları görülmüştür: Birincisi dilde tam karşılığı olmayan batı kökenli terimlere karşılık bulmak; ikincisi, siyasi gelişmelere bağlı olarak Türkiye’deki dil tartışmalarının etkisi altında disiplin dili kurmaya çalışmak. Yazarların dille ilişkileri açısından şu tavrı geliştirdikleri görülmüştür: (a) Bir bütün olarak Türk dilini ve özelde disiplin dilini yeniden kurmak; (b) yalnızca disiplin dilini kurmaya çalışmak; (c) dille ilgili bir iddia gütmeden anlaşılırlığı öncelemek; (d) dille ilgili hiçbir kaygı taşımadan Türkçeyi olduğu haliyle etkili kullanmayı isteyenler. Dil konusu aynı zamanda ideolojik bir tartışma olduğu için, yazarların dönemsel siyasi gelişmeler karşısında dile ilişkin yaklaşımlarında değişiklik olduğuna ilişkin ipuçlarına rastlanmıştır. Yazarların en benzeşen yönü, batı kökenli terimlere eski Türkçe kelimelere oranla daha hoşgörülü olmalarıdır. Dil sorununun ideolojik alandan 1980’lerden itibaren sıyrılmaya başladığı tespit edilmiştir. Ancak, dil üzerinden üretilen siyasi gerilimlerin bir yansıması olarak disiplin dilinin olgunlaşması ve dilsel bütünlüğün sağlanması yolunda hala alınacak mesafe olduğu sonucuna ulaşılmıştır.
Pazarlamada Yeni Trendler ve Dijital Reklamın Post Covid Sonrası Eğilimleri
Authors: KARAKAYA EREN Gül Kadriye
Published: July 2023

Pazarlama, insanlığın geçirdiği değişim ve dönüşümlere paralel olarak değişmekte ve kendi yolunu çizmektedir. Teknolojik ilerlemeler pazarlamaya yeni çözümler oluşturma, strateji geliştirme ve hedef kitleye ulaşma yolunda çeşitli fırsatlar sunmakta ve günümüz itibariyle dijital reklamlar öne çıkmaktadır. Dijital reklamcılık, geleneksel reklamcılıktan farkı olarak tüketiciye erişim ve etkileşimde oldukça etkilidir. Dijital reklamcılık çözümleri pazarlamacılara benzeri görülmemiş yenilikler sunmakta, bu sayede işletmeler artık belirli konumlarda ve zamanlarda çeşitli biçimlerde özelleştirilmiş ticari mesajlarla hassas bir şekilde hedef kitleye ulaşabilmektedir. Geleneksel reklamcılıkla karşılaştırıldığında, dijital reklamlar daha iyi hedefleme, yüksek alaka düzeyi, kişiselleştirilme, gerçek zamanlı ve açık etkileşim, programatik satışlar, çevrimiçi ve çevrimdışı yapay zeka yanıtlama, anlık ölçümleme gibi benzersiz seçeneklere sahiptir. Dijital pazarlamanın bahsedilen güçlü teknolojik altyapı sayesinde hedeflere ulaşmada başarılı yöntemler izlenmektedir. Bu çalışmada pazarlamanın dönüşüm evreleri, teknolojik gelişmelerin pazarlamaya olan etkisi kapsamında dijital reklamcılığın güncel eğilimleri incelenmiştir. Çalışma sonucunda, dijital reklamcılığın tüketilen, değişen ve gelişen bir süreç olduğu, bu sürecinde tüketici beklentilerine değişim gösterdiği anlaşılmıştır.
Güvenlik Sorunu Olarak Yönetişim Zafiyeti: Özbekistan Örneği
Authors: İRDEM İbrahim , BAŞAK Samet
Published: July 2023

Bireylerin, örgütlerin veya toplumların ortak amaç ve hedefler etrafında birleşmesinde

ve müşterek çıkarların belirlenmesinde farklı paydaş gruplarının etkileşimini esas alan

yönetişim etkili bir güvenlik yönetimi yapısının inşasında temel unsurlardan birisidir. Çok

aktörlü, hesap verebilir, şeffaf, adil, etkili ve katılımcılığa dayanan yönetişim anlayışının

tatbiki başta iç güvenlik olmak üzere güvenliğe ilişkin farklı veçhelerin itici gücünü

oluşturmaktadır. Bu çalışma, yönetişim kavramı ile güvenlik ilişkisine odaklanarak

Özbekistan örneği üzerinden yönetişim zafiyetinin güvenlik sorunlarının ortaya çıkmasındaki

etkisini ele almayı amaçlamaktadır. Bağımsızlık sonrası dönemden bugüne Özbekistan

özelinde yaşanan gelişmeler yönetişim ve güvenlik ilişkisinin anlaşılabilmesi bakımından

önemli tespitler sunmaktadır. Türkiye ile olan yakın diplomatik ilişkileri yanında jeopolitik ve

jeostratejik açıdan Orta Asya’da önemli bir konuma sahip olan Özbekistan’ın günümüzde

karşılaştığı güvenlik sorunları yönetişim sürecinin sağlam bir yapıya kavuşturulmasına

bağlıdır. Bu nedenle çalışmada yönetişim ve güvenlik ilişkisi Özbekistan örneği üzerinden ele

alınarak alan yazınına katkı sunulması amaçlanmaktadır Toplumsal katılım, adalet,

demokrasi, hesap verebilirlik, şeffaflık gibi ilkeler temelinde şekillenen yönetişim esaslı idare

tarzının günümüzde Özbekistan’ın karşılaştığı güvenlik tehditlerinin en aza indirilmesinde

faydalı olacağı değerlendirilmektedir.
Role of Social Innovation in Alleviating Poverty and Achieving Sustainable Development
Authors: ATES Muradiye
Published: July 2023

Combating poverty and sustaining development is one of the most significant challenges humanity needs to overcome. Governments, local institutions, non-profit organizations, academia, and companies are making great efforts to alleviate poverty and ensure sustainable development. However, these efforts cannot be reached the desired level in changing and transforming the world. Therefore, these problems, which were addressed in conventional ways, must be considered and resolved through “innovative approaches”. The aim of this study is to address the concept of social innovation, which can be used as a solution to social problems in general, and as a tool in combating poverty and regional development in particular, with examples of successful applications. In this sense, firstly, the concept of social innovation is discussed in the context of poverty alleviation and sustainable development through qualitative research. This study also evaluates the role of social innovation practices and solutions in poverty reduction and sustainable rural development by analyzing two cases such as the KIVA microcredit system and community-supported agriculture. These cases have been examined in terms of innovativeness, sustainability, social impact, target audience, and institutional structure. As a result, it revealed that the cases mentioned above contribute to poverty reduction and regional development in terms of innovation, target audience, sustainability and social impact.
Impact Stiffness of Linear Viscoelastic Model for Seismic Pounding Simulation: An Experimental Evaluation
Authors: Jaradat Yazan , Far Harry
Published: July 2023

Pounding between adjacent structures occurs when the separating distance within the two buildings is inadequate to contain the movement between them during an earthquake event. Seismic pounding can lead to significant harm or even the destruction of neighbouring structures. In creating a model for structural response, impact stiffness is considered as a critical factor in calculating the impact force throughout the collision within adjacent structures. It is important to derive realistic stiffness values when performing a numerical simulation of pounding forces within abutting structures to attain valid results. The objective of this study is to ascertain the impact stiffness within the linear viscoelastic contact model, using data obtained from shaking table experiments of pounding between neighboring five-storey and 15-storey single-bay model of steel-frame. The steel models were subjected to scaled ground acceleration records, two far-field and two near-field. The study’s findings indicate that there is a significant discrepancy between the theoretical impact parameters and the measured experimental value because the assumptions made to derive the theoretical formulas do not align with the actual impact conditions. The accuracy and precision of the experimental formula adopted in this study have been validated in comparison with the numerical results. Doi: 10.28991/CEJ-2023-09-06-01 Full Text: PDF
Production Economical Reinforced Concrete Slabs using Eco-Friendly Material
Authors: Shubber Mustafa S. , Mohammed Thaer J. , Breesem Khalid M.
Published: July 2023

Concrete is a material that is strong in compression but weak in tension. To overcome this issue, reinforcement must be used to improve the tensile strength of the concrete. However, it is acknowledged that steel has its drawbacks, such as the fact that it has a high cost and corrosion potential, and the rebar is heavy, non-renewable, and non-environmentally friendly. Thus, this experimental study investigates the potential product of economical reinforced concrete slabs using eco-friendly materials. Firstly, to enhance the concrete properties, a compressive, tensile, and flexural test, also a concrete with the addition of polypropylene fiber outlasted the control mix design in terms of strength and durability. The results included the control mix (CM), F1 0.25%, F2 0.50%, F3 0.75%, and F4 1%. The specimen with the highest compression and tensile strength was 24.28 MPa and 3.15 MPa, respectively, for the F1 specimen with 0.25% short fibers. Secondly, the bending test was carried out on ten slabs to check the structural behavior of these slabs reinforced with reed rods as the eco-friendly material. The good results of the bearing capacity of a partially reinforced concrete slab with a reed have been obtained at 23.8 kN. Meanwhile, to obtain better results, this research has enhanced the behavior of the concrete slab by improving the concrete's properties by adding polypropylene synthetic microfiber to the mixed concrete. In addition, giant reeds treated with epoxy increase the bonding strength with concrete, improve tensile strength properties, and reduce the absorption of reeds. Therefore, the bearing capacity results of the reed-reinforced concrete slab became the best, which were 35.83 kN. Thus, reinforcement of one-way slabs by reed partially with appropriate diameters could be substituted to obtain good performance in the reconstruction of low-cost buildings. As a result, economical reinforced concrete slabs have been produced using eco-friendly materials. Doi: 10.28991/CEJ-2023-09-06-010 Full Text: PDF
Performance of Isolated Footing with Several Corrosion Levels under Axial Loading
Authors: Youssef Ahmed , Hegazy Mahmoud , Mostafa Hatem
Published: July 2023

This research aims to illustrate the corrosion process and its effect on the deterioration of reinforced concrete (RC) isolated footings using a small-scale model (1/8) and present the results of a prototype-scale study using a numerical model with different concrete depths and corrosion levels under axial load. The experimental program consisted of testing five small-scale (1/8) model RC isolated footings under axial loading after subjecting them to accelerated corrosion tests with a constant current. The main variable in the small-scale sample test was the corrosion level. This study presents an experimental approach, using the constant current method and the finite element method (FEM) with the ABAQUS package, to examine its effect on the axial load behavior under different corrosion ratios, which were 0%, 4.21%, 9.11%, 24.56%, and 30.67%. On the prototype scale, the variables were the corrosion level and the RC depths of 300 mm, 400 mm, and 500 mm. The results indicated that the average deviation in ultimate load between the experimental and FEM outcomes for the small-scale was below 5.6%, while the average deflection deviation was 6.8%. Also, the study found that an increase in the depth of the RC footing and corrosion ratio led to a more pronounced impact of the cracking pattern in the concrete and corroded bars, as well as a greater difference in the failure load. The experimental results suggest that the proposed numerical model is accurate and effective. These findings have important implications for the evaluation of isolated footings affected by corrosion damage using FEM, and can help inform decisions related to their design and maintenance. The failure loads of non-corroded footings with different depths were compared with the ECP-203 provisions of the 2018 Egyptian Code, and how corrosion ratios can be simulated by numerical models. The percentage variation between the design loads by code and the numerical loads by ABAQUS for controlled footings with thicknesses of 300, 400, and 500 mm was found to be 73%, 80%, and 78%, respectively. Using the derived relationship, the equivalent corrosion ratio percentages were 23.8%, 20.2%, and 32%, respectively. Doi: 10.28991/CEJ-2023-09-06-011 Full Text: PDF
Assessment of Fly Ash-Rice Straw Ash-Laterite Soil Based Geopolymer Mortar Durability
Authors: Rangan Parea R. , Tumpu M. , Mansyur . , Mabui D. S.
Published: July 2023

Geopolymer is an inorganic form of alumina-silica that is synthesized through materials containing lots of silica (Si) and alumina (Al) originating from nature or from industrial by-products. The geopolymer binder is a two-component inorganic system consisting of solid components that have sufficient amounts of SiO2 and Al2O3 to form compounds such as fly ash, rice straw ash, pozzolan, laterite soil, slag, etc. This study aims to analyze the compressive strength, chemical compositions, and geopolymerization process of geopolymers produced from fly ash, rice straw ash, and lateritic soil bound with an alkaline activator, sodium hydroxide (NaOH), with a concentration of 12 M. The durability of the geopolymer mortar was determined by soaking for 3, 7, and 28 days using water curing and sulphate curing (Sodium Sulphate, Na2SO4, and Sulfuric Acid, H2SO4). The results showed that sodium hydroxide (NaOH) can release silica and alumina in the amorphous phase and can be used as a binder for geopolymer mortar made from straw ash, fly ash, and laterite soil without using oven heat, according to compressive strength, chemical compositions, and the geopolymerization process. The results of this study can be used to support the use of waste materials (fly ash and laterite soil) and local materials (straw ash) as geopolymer mortar-forming materials. Furthermore, it can aid in the development of eco-friendly (environmentally friendly) national infrastructure by eliminating the need for oven heat to initiate the polymerization reaction. However, this research can also be developed to increase the compressive strength of geopolymer mortar, which resembles that of conventional concrete in general. Doi: 10.28991/CEJ-2023-09-06-012 Full Text: PDF
Evaluating the Potential of Recycled Asphalt for Sustainable Road Construction: An Environmental and Economic Analysis
Authors: Ahmeti Muhamet , Ahmetaj Milaim , Krelani Visar
Published: July 2023

Objective: This study investigated the possibility of using recycled asphalt for road construction and maintenance in Kosovo. Methods: By analyzing statistical data from the Ministry of Infrastructure based on the status of infrastructure, the life cycle of asphalt, and investments in this area, this study determined the amount of asphalt that needs to be recycled. Results: The results showed that 1454008.5 m3 of asphalt needs to be recycled in Kosovo. We studied using 10%, 15%, and 20% recycled asphalt in asphalt base courses. We determined the benefits of recycled asphalt in terms of environmental protection, energy savings, and low cost. Depending on the percentage of recycled asphalt, the savings in mineral mix ranged from 11% to 23% and the road bitumen dosage from 6 to 8.5%. Novelty/Improvement: The proposed method of reusing recycled materials can reduce the consumption of natural resources, energy, and financial costs and help protect the environment. Doi: 10.28991/CEJ-2023-09-06-014 Full Text: PDF
The Influence of Climatic Aging on the Performance of Wood-Based Panels
Authors: Pakhomova Ekaterina , Emelyanov Sergey , Yartsev Viktor , Danilov Vladislav , Monastyrev Pavel
Published: July 2023

The purpose of this work is to experimentally determine the climatic effects on the performance of wood-based panels using the methodology developed on the basis of the thermo-fluctuation concept of material aging. This methodology makes it possible to determine the durability of the material by taking into account the simultaneous action of temperature, time, and mechanical stress, as well as additional external influences. The experiments were conducted on particleboard, fiberboard, and plywood. The following climatic effects were studied experimentally in specialized laboratory facilities: high humidity, thermal aging, and UV-irradiation. As the evaluation indicators of the performance characteristics of wood boards were selected, water absorption, swelling rate, thermal expansion, penetration strength, and bending strength. From a theoretical point of view, the value of this work lies in demonstrating a methodology for determining the performance characteristics of particleboard, fiberboard, and plywood, which is highly accurate by considering these characteristics together rather than separately. From a practical point of view, this paper contains experimental results that allow us to judge the characteristics of the wood boards. It has been proven that exposure to UV rays and heat aging causes the binder between the filler particles to break down, and moisture is detrimental to the filler. The thermo-fluctuational constants obtained in the course of the study make it possible to predict the durability of the materials in question over a large range of operating parameters. Doi: 10.28991/CEJ-2023-09-06-015 Full Text: PDF
Soil Reinforcement Model Test Using Timber Pile at Liquefaction Area
Authors: Suyadi . , Harianto Tri , Muhiddin A. Bakri , Arsyad Ardy
Published: July 2023

Indonesia is a tropical country threatened by many disasters, such as earthquakes and other collateral hazards (liquefaction). Utilization of micro pile on the liquefaction prone areas is quite popular to increase the soil bearing capacity. In this research, Eucalyptus Pellita Timber was used as micro-piles alternatives. This study aims to determine the effect of timber pile addition on soil settlement and the increase in bearing capacity. Some laboratory investigations were conducted, such as timber and soil physical and mechanical characteristics, preloading tests, and seismic load tests by using small-scale shaking table test. The preloading tests were carried out for 40 days, and the settlements were recorded every 24 hours. Subsequently, seismic load tests were conducted on sandy soil with Dr = 40%. The seismic duration was 37 seconds, with PGA = 0.3 g and f = 0.78 Hz. The preloading test results show that Eucalyptus pellita timber piles are able to reduce the settlement by 18%. and from seismic load testing results are able to reduce the settlement by 68% due to earthquake loads with PGA = 0.3g and a frequency of 0.78 Hz on sandy soil with the potential for liquefaction. This is due to the resistance at the tip of the pile and the skin friction on the timber pile. So, from the results of the model test, it shows that the use of Eucalyptus Pelita timber piles can be used as an alternative to handling sandy soils in areas where liquefaction has the potential to occur. Doi: 10.28991/CEJ-2023-09-06-016 Full Text: PDF
Adsorption of Heavy Metals from Contaminated Water using Leachate Modular Tower
Authors: Aneke Frank , Adu Joy
Published: July 2023

The heavy metals (HMs) and metalloids such as Cr(VI), As(Ill), and Pb(II) in contaminated water are toxic even at trace levels and have caused devastating negative health impacts on human beings. Hence, the effective adsorption of these heavy metals from contaminated water is important to protect biodiversity, hydrosphere ecosystems, and human beings. In this study, a leachate modular tower (LMT) was developed for the singular purpose of adsorbing HMs. The LMT contained nano-slag as a liner, which was synthesized from slag. The nano-slag was blended in different proportions of 90:10; 80:20, 70:30, 60:40, and 50:50 to the combined mass of clay and nano-slag, to evaluate the most efficient ratio of the blends capable of adsorbing HMs and metalloids with 100% efficiency. A series of leachate tests were performed to evaluate the adsorption capacity of LMT with different embedded liners. Attenuation periods of 2, 5, 7, and 10 days with a temperature of 500 °C were also selected to improve the sorption rate and uptake of HMs. Subsequently, the effluents were subjected to inductive coupled plasma mass spectrometry (ICP-MS) tests to evaluate the concentrations and percentages of adsorbed HMs, which were calculated using a pseudo-first-order adsorption model. The results revealed that the removal of 98%As, 99%Cd, and 99.9% Pb was achieved with a 50%:50% ratio of soil and nano-slag as the liner at 10 days equilibrium period. Furthermore, 98%Zn, 95.45%Cu, 93.3%Fe, 97%Ni, and 89% Hg were achieved upon further investigation using the same dosage of soil and nano-slag and equilibrium conditions. The scanning electron microscopy (SEM) tests demonstrated that some traces of the absorbed HMs and metalloids were found on the liner surfaces, indicating significant changes in microstructure. The results indicated the sorption rate increased significantly due to the elevated temperature, aluminosilicate structure, and prolonged attenuation period, which are also associated with an elevated pH level and higher cation exchange capacity (CEC), of the liner. Doi: 10.28991/CEJ-2023-09-06-017 Full Text: PDF
The Acoustic Performance of Natural Composites in Reducing Stress Levels: Textile Industry
Authors: Widjanarti Maria P. , Probandari Ari , Sumardiyono . , Sunarto .
Published: July 2023

The porous characteristics of recycled natural fibres make them suitable for use as acoustic materials. Straw and water hyacinth fibres are natural materials that can potentially be used as composites in damping devices. This study evaluated the acoustic performance of two types of reinforced composites containing natural fibers (water hyacinth and rice straw) and gypsum adhesives in reducing stress levels in the textile industry. The evaluation was carried out through laboratory tests using impedance tubes and direct testing in a textile factory to reduce the stress level of production machine workers and operators. Rice straw and water hyacinth fibres were thoroughly mixed in proven mass ratios of 10% and 30% with water and gypsum plaster as a binder. The mixture was pressed into a mould at a pressure of 3 MPa before being heated in an oven at 900ºC for 5 hours. Perforations measuring 4 to 8 mm in diameter were then made at equal distances on the panels. Acoustic panel performance tests were carried out with impedance tubes according to ISO 10534-2 standards at sound frequencies ranging from 0 to 6400 Hz. Field tests were also conducted at a textile factory, with each machine unit generating a sound source of 100 to 110 dB. Heart rate data was collected, and noise measurements were carried out before and after the panels were installed in the area around the operating machines. The results showed that the rice straw-gypsum composite with four perforations performed the best, achieving an α coefficient of 1.0 at a frequency of 1500 Hz and an NRC of 0.50, indicating effective noise reduction. The installation of acoustic panels around the noise source in the textile industry reduced noise levels by up to 9.8 dB and was found to affect workers' heart rates, indicating reduced stress levels. The questionnaire results also showed a significant effect on the stress levels of workers. The use of natural fibers in composite materials has the potential to be an eco-friendly and sustainable solution for soundproofing applications. Doi: 10.28991/CEJ-2023-09-06-02 Full Text: PDF
Prediction of Soil-Water Characteristic Curves of Four Subgrade Materials using a Modified Perera Model
Authors: Gueye Rokhaya , Ba Makhaly , Mbaye Ibrahima , Ki Ida Bibalo Josiane
Published: July 2023

One of the main hydraulic properties of unsaturated soils is the Soil-Water Characteristic Curve (SWCC). It is essential to understand, predict soil water storage and determine the hydraulic and mechanical behaviour of soils. These curves can be obtained by direct and indirect measurements. The measurements to obtain these curves are expensive, delicate to perform and can be really slow for fine soils, so predictive models become necessary. In order to make a numerical model, a couple of identification tests were carried out to obtain the physical properties of each sample among the four subgrade materials collected in the regions of Dakar and Thies (Senegal). The measurement tests of the matric suction were then conducted depending on the nature of the material (fine-grained soil or coarse-grained soil) and allowed to draw the SWCC of each soil. Among numerous predictive models developed for SWCC in the last decades; this study used the Perera model to fit the SWCC of four (04) subgrade materials, which did not give a satisfactory coefficient of correlation (R2 = 58% and a relatively low sum of the squared residuals (SSR)). This leads to modifying the Perera model to better fit the SWCC on the basis of an understanding of the effect of each parameter on the shape of the SWCC. The proposed modified model was validated by checking the adjusted R2, minimizing the SSR in order to approach at most the experimental air entry value. The modified model works pretty well on coarse-grained and fine-grained soils. This modified model of Perera provided a very good correlation R2equal to 99.98, 98.74, 99.64, and 99.73 for the sandy soils (Sebikotane and Keur Mory) and the Marley and Clayey soils of Diamniadio, with a minimal SSR obtained compared to Perera’s and Hernandez model. Doi: 10.28991/CEJ-2023-09-06-03 Full Text: PDF
Experimental Study on Ultimate Strength of Steel Tube Column Filled with Reactive Powder Concrete
Authors: Al-Abbas Bahaa , Abdul Rasoul Zainab M.R. , Hasan Dhafer , Rasheed Sajjad E.
Published: July 2023

Composite concrete Filled Tubular Steel (CFT) members, which have excellent deformability due to the well-known confined and constrained interaction between steel tube and concrete, have largely been utilized as bridge piers or columns in high-rise buildings, resulting in increased strength and decreased column size. This study examined the experimental performance of steel tube columns filled with reactive powder concrete (RPC) under axial compression. Three sets of columns were used in the experiment, each with variations in shape (square, rectangular, and circular), length-to-diameter ratio, and compressive strength of the RPC. The first set consisted of five columns, while the second and third sets each had seven columns with three different lengths (750 mm, 600 mm, and 450 mm) and two different compressive strengths (54 and 92 MPa). A new numerical model was developed to calculate the ultimate failure load of the columns by considering factors such as the yield strength of steel, the compressive strength of concrete, the column shape, and the ratio of concrete to steel. This model was validated by comparing the results obtained from the experiments to those predicted by the model, as well as by designing equations from various codes. The results showed that the proposed numerical model accurately predicted the ultimate failure load for columns filled with different types of concrete, especially for RPC, while maintaining conservatism compared to the ACI, AISC, and EN codes equations. Doi: 10.28991/CEJ-2023-09-06-04 Full Text: PDF
Behavior of Centrifuged GFRP Poles Under Lateral Deflection
Authors: Awad Youssef A. , EL-Fiky Ahmed M. , Elhegazy Hosam M. , Hasan Mahmoud G. , Yousef Ibrahim A. , Ebid Ahmed M. , Khalaf Mohamed A.
Published: July 2023

Centrifugal-manufactured GFRP pipes are widely used today as lighting and low-power transmission poles due to their lightweight, high electrical insulation, low cost, and corrosion resistance. Despite these advantages, GFRP poles suffer high deflection problems due to their low elastic and shear moduli values. In order to overcome this disadvantage, three techniques were suggested to control the lateral deflection of the GFRP poles: an extended internal steel stub, external steel angles, and internal steel bracing bars. The main objective of this study is to determine the optimum strengthening technique to improve the serviceability of GFRP poles in terms of lateral deflection according to ASTM D4923. An experimental research program containing five full-scale GFRP poles was carried out to determine the optimum strengthening technique and the effect of connectors opening near the base and compare it to previous research. The results indicated that flexural stiffness was increased by 44%, 66%, and 38% for the extended stub, steel angles, and bracing bars, respectively. Besides that, the reduction in flexural stiffness due to connector opening was about 8%. The measured deflections showed good matching with simplified mathematical calculations, and the division was about ±10%. The external steel angle technique showed the best efficiency in Stiffness behavior. Doi: 10.28991/CEJ-2023-09-06-07 Full Text: PDF