bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Impact of Environment on Speaking Skills in 4 Year Old Children
Authors: Angelina Kurnia Juita  , Veronika Owa Mere  
Published: December 2024

Speaking skills are the skills or abilities of a person in conveying ideas, ideas, thoughts and feelings to others using spoken language clearly, correctly and can be understood by others. Speaking skills are closely related to the family environment and the school environment. A less supportive environment greatly affects children's speaking skills. This study aims to describe the impact of the environment on speaking skills in 4-year-old children in Simpang Kepuh RT 07 RW 10 Sukun sub-district, Malang city. The type of research used in this study is qualitative with a case study method with the research subject totaling one girl. Data collection techniques using observation, interviews and documentation. The data analysis technique uses qualitative descriptive analysis techniques which include data reduction, data presentation, and ends with drawing conclusions. Data validity techniques using extended observation and source triangulation. The results showed that the environment has an impact on children's speaking skills. The environment in question is a family environment and a school environment that does not stimulate children's speaking skills.
Improving Children's Fine Motor Skills Through Playing Plasticine at Raudhatul Athfal Al-Fajar
Authors: Nirwana Febriani Hasibuan  , Ahmad Syukri Sitorus  
Published: December 2024

This research aims to improve performance so that children's fine motor development can develop well. This research was conducted at RA Al Fajar located at Jln Jermal XV No. 5 Denai, Medan Denai District. This is a classroom action research implemented by researchers in the classroom using self-reflection. This research was conducted in the 2023/2024 school year, specifically in the even semester, involving 20 children as research subjects, consisting of 10 boys and 10 girls. The results showed that the use of plasticine in improving children's fine motor skills resulted in consistent and significant improvements from pre-cycle to cycle II, both in individual scores and class averages. The total score increased from 137 in pre-cycle to 169 in cycle I, and finally reached 374 in cycle II. The research makes a significant contribution in the development of fine motor skills in early childhood. The research offers innovation in learning methods by introducing fun and interactive activities, which helps teachers find alternative teaching approaches that suit children's developmental needs.
Use of Picture Card Games to Improve Children's English Language Skills in Kindergarten
Authors: Ulfah St. Maria 
Published: December 2024

This study aims to determine the use of picture cards in making learning media for early childhood. Card games often involve an element of repetition, be it in the form of game rules or in the practice of matching cards. This repetition helps to strengthen the child's memory of the vocabulary learnt. Meanwhile, the lecture method tends to be boring in introducing children to vocabulary in English. Picture cards provide a visual stimulus that helps children associate pictures with specific English words, making it easier to recognise and understand new vocabulary. The method used is a qualitative research approach. The subjects to be studied are teachers who have used English picture cards totaling 5 teachers at Aisyiyah Lutang Majene Kindergarten. Data collection techniques in this study were observation, documentation, and interviews using previously validated instruments. The results showed that by using picture card media. The ideas that teachers find when using picture card media, are adjusted to the teacher's ability to support English language learning activities in the classroom
Improving Fine Motor Development Through Paper Clay Media in Early Childhood
Authors: Khofifah Nur , Wisudaningsih Endah Tri , Purnamasari Debby Adelita Febrianti 
Published: December 2024

This study is motivated by the results of observations at TP Ar-Rahmah, Rawan Village, Probolinggo Regency District, related to the development of fine motor skills of children who are still not optimally developed. This can be seen from the less than optimal ability of children to move their fingers, eye and hand coordination. The problem in this study is how to improve fine motor skills through playing with paper clay in early childhood at TP Ar-Rahmah, Rawan Village, Probolinggo Regency District. The purpose of this study was to determine the development of fine motor skills through paper clay activities also called pulp paper at TP Ar-Rahmah, Rawan Village, Krejengan District, Probolinggo Regency. The method used in this research is descriptive qualitative with the subject of 10 children, descriptive qualitative research with observation, interview, and documentation assessment techniques. The analysis techniques used are data collection, data reduction, data presentation, and conclusion drawing. The results of this study indicate that paper clay activities can help children in improving children's fine motor skills, imagination, and creativity.
COMPATIBLIZAÇÃO DE PROJETOS DE EDIFICAÇÕES: ESTUDO DE CASO DE DOIS EDIFÍCIOS MULTIFAMILIARES
Authors: Franz Felipe , Wiese Marcos 
Published: December 2024

Objetivo: O objetivo desta pesquisa é analisar as não-conformidades mais recorrentes e comparar o método de sobreposição 2D com checklist em relação a plataforma automatizada e parametrizada 3D.

Referencial Teórico: Os projetos de edificações são compostos de diferentes disciplinas e são realizados por diversos profissionais conforme sua especialidade. Esta divisão, no entanto, enfatiza a necessidade da compatibilização entre os diversos projetos para evitar retrabalhos no canteiro de obras por conta de interferências não identificadas nesta fase.

Método: Estudo de caso de duas edificações multifamiliares, de dois pavimentos em estrutura de concreto armado e fechamento de alvenaria de vedação. Os projetos (arquitetônico e complementares) foram elaborados por diferentes projetistas. A compatibilização foi realizada por dois métodos: (i) compatibilização manual através de checklist e sobreposição de desenhos 2D (ii) Modelagem em BIM com detecção automática de intereferências.

Resultados e Discussão: Na compatibilização dos projetos das edificações 01 e 02, a análise manual identificou mais incompatibilidades com os projetos hidrossanitários (respectivamente 41% e 40%), enquanto a automatizada identificou mais incompatibilidades com a estrutura no primeiro projeto (38%) e a arquitetura no segundo (37%). Comparando com outros estudos, constatou-se a inexistência de um padrão de incompatibilidades entre as disciplinas de projeto.

Implicações da Pesquisa: A prevalência de incompatibilidades entre uma disciplina e outra está diretamente relacionada a experiência e conhecimento dos projetistas, bem como as especificidades de cada obra. O mesmo verifica-se a respeito da qualidade da compatibilização dos projetos.
INFLUÊNCIA DA ESPESSURA DAS JUNTAS DE ASSENTAMENTO NA RESISTÊNCIA À COMPRESSÃO DE PAREDES DE ALVENARIA ESTRUTURAL DE BLOCOS DE CONCRETO
Authors: Krenkel Eliton Maurício dos Santos , Wiese Marcos 
Published: December 2024

Objetivo: Estudar a influência da espessura de argamassa de junta de assentamento dos blocos de concreto na resistência à compressão de paredes de alvenaria estrutural.

Referencial Teórico: A resistência das paredes depende da resistência dos materiais utilizados e da interação entre eles, assim, a espessura da junta de assentamento pode influenciar na resistência da parede.

Método: Foi realizada uma pesquisa experimental, com blocos de concreto de 14 cm x 19 cm x 39 cm e moldados 18 prismas ocos com espessuras de argamassa de assentamento de 5mm, 10mm e 15mm e argamassa com traço 1:0,5:4 (cimento: cal: areia média). Foram realizados ensaios de compressão axial dos blocos e prismas e determinada eficiência prisma/bloco.

Resultados e Discussão: Os ensaios de resistência dos prismas de 5 mm, 10 mm e 15 mm apresentaram resistência característica à compressão fpk,est = 3,765 MPa, fpk,est = 3,759 MPa e fpk,est = 3,546 MPa respectivamente. Os prismas executados com junta 5 mm alcançaram a maior resistência à compressão, 0,16% maior que a resistência dos prismas executados com junta de 10 mm, o aumento da espessura para 15 mm diminuiu a resistência do prisma em 5,66% comparando com espessura de 10mm. Concluiu-se que a espessura da junta de assentamento influência na resistência à compressão da parede de alvenaria estrutural.

Implicações da Pesquisa: Este estudo enfatiza a importância do controle rigoroso da espessura das juntas de assentamento, conforme os limites estabelecidos pela NBR 16868 (ABNT, 2020) de 10 mm ± 3 mm.
An Investigation of Dynamic Soil-Structure Interaction on the Seismic Behavior of RC Base-Isolated Buildings
Authors: Santoso Alvin K. , Saito Taiki 
Published: December 2024

Soil-structure interaction (SSI) can significantly influence earthquake responses in base-isolated (BI) buildings, yet it is often overlooked in practice due to the high computational demands of complex analyses. This study investigates SSI effects on reinforced concrete (RC) base-isolated buildings, idealizing SSI with a cone model. Three BI building models of varying heights and soil characteristics were analyzed using modal and nonlinear time history analysis. The base isolation system incorporated elastic sliding bearings, lead rubber bearings, natural rubber bearings, and oil dampers. The SSI model was idealized considering hard, medium, and soft soils. To simulate earthquake input, three artificial ground motions with different phase characteristics were generated to match the design response spectrum according to the Japanese code. The seismic responses of the base-isolated building models with SSI were compared to those of models without SSI. Modal analysis showed that the natural period increased with softer soil profiles. In the first and second modes, the natural period lengthened as the building’s aspect ratio increased. Conversely, in the higher modes with a rocking pattern, the building with the lowest aspect ratio exhibited the longest natural period. Overall, implementing SSI generally reduced seismic responses, notably lowering story drift, acceleration, and force, particularly for buildings on soft soil. However, the SSI effect significantly increased the base rotation angle in high aspect ratio buildings on soft and medium soils. These findings indicate that including SSI in analysis is essential for more realistic seismic response predictions, especially for tall, slender base-isolated buildings. Doi: 10.28991/CEJ-2024-010-11-01 Full Text: PDF
Effect of Coal Combustion Waste on Cement-Treated Clay
Authors: Nugroho Soewignjo A. , Wardani S. P. Retno , Muntohar A. S. , Satibi Syawal 
Published: December 2024

High plasticity clay is soil with poor material characteristics; one of them is the large shrinkage condition due to its high plasticity. Therefore, it is necessary to improve the soil using cement and coal-combustion waste (CCW). The purpose of this research is to determine the effect of mixture addition on the CBR value of the specimen on stabilization. Variations of 6%, 9%, 12%, and 15% of CCW and cement content vary by 3% and 5%. Based on the test results, there is an increment in the CBR bearing capacity, which was initially 0.80% to 18.75% to 42.90% by adding cement and CCW between 6% and 15%, respectively, after 7 days of curing. This increment is the largest of all variations in the CBR test. The percentage of increment in CBR value is quite large, i.e., a multiple of 200. This proves that the mixture is able to work effectively in increasing the bearing capacity of the soil. Based on microscopic testing of CBR samples, it is obtained that the higher the levels of Bottom Ash Fly Ash (BAFA) and cement, the rougher and paler the samples became as the structure changed. And vice versa, the lower CCW content and cement content made the sample structure become smoother and brighter in color, closer to the original color of natural clay. Doi: 10.28991/CEJ-2024-010-11-010 Full Text: PDF
Evaluating the Rutting Resistance of Asphalt Mixtures Containing Waste Steel and Treated Recycled Concrete Aggregate
Authors: Hussein Ghufran Abd Al-Mohsen , Ismael Mohammed Qadir 
Published: December 2024

Using treated recycled concrete aggregate (RCA) in asphalt with waste steel reinforcement benefits the economy and the environment while delaying asphalt pavement deterioration. This study examined the impact of using RCA in several percentages reinforced by three dosages of waste steel: 0.3, 0.6, and 0.9 added as a proportion of mixture weight. The RCA was immersed in a 0.1M Hydrochloric acid solution for one day to treat the weak cement mortar in RCA and reduce the thickness of this layer. The assessment was carried out in a laboratory using the typical Marshall test to determine the optimum quantity of asphalt contents, the volumetric properties of asphalt mixtures, and the wheel tracking test; the study involved ten rectangular slabs measuring 30×40×5 cm, and they were repeatedly subjected to 700 N wheel loads at 55°C to test their rut resistance. According to the study, while Marshall's stability increased, adding waste steel and RCA did not significantly alter the volumetric properties of asphalt mixes. The greatest improvement in Marshall stability, 45.18% over the conventional mix, was seen in the mix, including 75% RCA and 0.9% waste steel. The rutting performance decreased with the addition of RCA and rose with the inclusion of waste steel. The results indicate that adding waste steel to asphalt mixtures effectively increases the rutting resistance. The mixture with 50% RCA and 0.9% waste steel showed less rutting depth of 25.01% than the conventional mix. Doi: 10.28991/CEJ-2024-010-11-011 Full Text: PDF
Assessing the Effect of Geometric Design and Land Use on Roundabouts Using Video Camera
Authors: Al-Mistarehi Bara , Imam Rana , Al-Shawabkah Majdoleen M. , Shtayat Amir , Al-Omari Aslam 
Published: December 2024

This study is concerned with assessing the effect of geometric design and land use on roundabouts, which are one of the most widely used traffic calming techniques. It aims to study the speed profiles before, at, and after thirty selected roundabouts in Jordan to develop models for predicting the circulating speed for through movement as a function of the land use of the roundabout, the roundabout geometric characteristics, and the approaching highway free-flow speed. A laser radar gun was used to capture speed data, and geometric characteristics were extracted from video pictures. Various parameters were employed to simulate the circulating speed, including the roundabout diameters, free flow speed, entry deviation angle, approaching highway exit width, circulating roadway width, and entry width. Speed profiles were developed for six roundabout types with different land uses and geometric characteristics. It was found that the roundabout effect on speed reduction extends to 150 m downstream the exit and upstream the entry. It was also discovered that the rate of reduction varies according to the upstream street free flow speed (FFS), with dramatic decreases observed at the last 50 m upstream of the entry. Variability in the speed values around the midpoint of the circulatory roadway was observed, with speed at the exit being higher than that at the entry. Doi: 10.28991/CEJ-2024-010-11-012 Full Text: PDF
Performance of Asphalt Mixtures Modified with Nano-Eggshell Powder
Authors: Zghair Chfat A. Hadi , Yaacob Haryati , Mohd Kamaruddin N. H. , Al-Saffar Z. Hazim , Jaya R. Putra 
Published: December 2024

Primary issues in pavement engineering, such as rutting, moisture damage, and fatigue cracking, have prompted numerous studies aimed at improving pavement performance. Utilizing biomaterial waste to modify bitumen through nanotechnology is a promising approach to improve asphalt-mixture properties and aligns with goals of sustainability and reducing the dependence on non-renewable resources. Therefore, the primary objective of this study was to investigate the effect of nano-eggshell powder (NESP) as a sustainable bio-modifier for bitumen on the mechanical properties of asphalt mixtures. To achieve this, asphalt mixtures containing 0% (control), 5%, and 9% NESP were developed, and their mechanical properties were investigated through various tests such as moisture damage, Marshall immersion stability, resilient modulus, dynamic creep, double-punch shear, water immersion, and wheel tracking. The results showed that NESP reduced the moisture susceptibility of the mixtures by increasing their tensile strength ratio. Additionally, the durability of the asphalt mixtures improved as the NESP content was increased. Moreover, the addition of NESP significantly enhanced the resilient modulus and dynamic creep of the asphalt mixtures. The double-punch test revealed that the NESP improved the rutting and fatigue resistance of the asphalt mixtures. Furthermore, the water-immersion test indicated that NESP enhanced the adhesion properties between the bitumen and the aggregate. Finally, the wheel-track test results suggested that the mixtures modified with NESP exhibited a lower rut depth than the control mixtures. Notably, 9% NESP was optimal for enhancing the mechanical properties of the asphalt mixture. The study demonstrated that using NESP as a bio-modifier for bitumen is feasible and offers a more sustainable alternative to traditional bitumen additives. Doi: 10.28991/CEJ-2024-010-11-016 Full Text: PDF
Kinematic Seismic Isolation System with Magnetic Dampers
Authors: Lapin Vladimir , Kim Boris , Shakhnovich Alexandr , Shokbarov Yeraly , Aldakhov Yerken 
Published: December 2024

The aim of this study is to experimentally and theoretically investigate the behavior of a three-story fragment of a frame building constructed using the PGF-SIKF system—Prefabricated girderless frame with seismic-isolating kinematic foundations. Magnetic dampers are employed at the support level. The novelty of the research lies in the combination of a girderless frame with kinematic foundations and innovative magnetic dampers. The experimental research method involved loading the system with horizontal static force using a stationary winch, followed by the release of the load. Vibration measurements were recorded using a digital measurement system. The normative live load was simulated by applying additional static load. It was determined that the oscillation period varies between 1.8 and 2.1 seconds, depending on the amplitude of the impact. The dissipative characteristics of the seismic isolation system were obtained, with acceleration values during the testing phases ranging from 95 to 177 cm/s². The experimental results confirmed that the building fragment showed no visible damage. The logarithmic decrement of oscillations was found to range between 0.08 and 0.16. Theoretical studies involved calculations based on a sample of 14 real accelerograms, with parameters corresponding to the magnitudes of local earthquakes (M=6), the maximum magnitude expected in Shymkent. The main result is the reduction of seismic loads achieved by using kinematic foundations in the girderless frame system. It was established that, under 7-8 intensity seismic events, the average displacements at the foundation level will not exceed the experimental values. Doi: 10.28991/CEJ-2024-010-11-018 Full Text: PDF
Green Construction and Local Wisdom Integration for Sustainability: A Systematic Literature Review
Authors: Sri Kristinayanti W. , Zaika Yulvi , Padma Devia Y. , Solimun . , Agung Wibowo M. 
Published: December 2024

The construction industry's environmental impact necessitates a sustainable shift to mitigate resource depletion, emissions, and biodiversity loss. Integrating local wisdom offers innovative, adaptive solutions grounded in deep environmental understanding, potentially transforming construction practices toward sustainability. This study aims to identify aspects, challenges, impacts, and strategies in green construction practices integrated with local wisdom. The PRISMA framework methodology was used to conduct a comprehensive systematic review with qualitative analysis using NVivo software. Nine aspects of green construction integrated with local wisdom were identified, with cultural heritage preservation the dominant aspect. Eleven challenges were uncovered, with balancing tradition and innovation as the main challenges. Seven impacts on the economy, society, and environment were identified, with construction cost efficiency, improvement of community quality of life, and promotion of a circular economy and sustainable waste management as the dominant impacts. Thirteen strategies were identified, with active engagement of local communities in the construction process as the main strategy. The novelty of this research is a comprehensive review of the integration of green construction with local wisdom, which can be used as a guide in sustainable construction practices responsive to local environmental and social conditions and promote economically, socially, and environmentally sustainable development. Doi: 10.28991/CEJ-2024-010-11-020 Full Text: PDF
A Formula for Predicting Primary Settlement of Tropical Highly Organic Soil and Peat in the Field
Authors: Prativi Ayu , Mochtar Noor Endah , Mochtar Indrasurya B. 
Published: December 2024

Highly organic soil and peat are problematic soils due to their low bearing capacity and high compressibility. In tropical regions, the presence of woody material in these soils often affects the stress-compression and time-compression curves in load-increment consolidation tests, leading to unusual shapes. Consequently, conventional inorganic soil theory and the Cα/Ccconcept are inadequate for analyzing their compression behavior. As an alternative, the Gibson and Lo model can be used to obtain compression parameters from single-load consolidation tests. However, this method introduces considerable discrepancies when predicting the primary settlement. To address this issue, this paper proposes a formula for predicting the primary settlement in highly organic soil and peat in the field, especially in tropical regions. Samples were collected from several locations in Indonesia. The formula was constructed from the stress-strain relationship during the primary compression stage, obtained from numerous single-load consolidation tests. Long-term field settlement is predicted by combining this empirical equation for primary settlement with the Gibson and Lo model for secondary settlement. The proposed formula was verified using field soil monitoring data, demonstrating reasonable accuracy in predicting the primary settlement of highly organic soil and peat. Doi: 10.28991/CEJ-2024-010-11-03 Full Text: PDF