bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimizing compressive strength of concrete incorporating metakaolin and palm oil fuel ash
Authors: Mansour M A , Ismail M H , Wan Ibrahim M H , Mokhtar N , Alshalif A F 
Published: February 2025

Abstract
Metakaolin (MK) and palm oil fuel ash (POFA) were utilized in high strength concrete (HSC) as a partial substitutes for cement, which is responsible for high CO2 emissions. The combined effect of (5-15%) MK and (20-40%) POFA on the compressive strength of HSC was thoroughly examined using response surface methodology (RSM). In particular, central composite design (CCD) was adopted to optimize the compressive strength of ternary blended concrete at 7 and 28 days. Through analysis of variance (ANOVA), the developed models demonstrated statistical significance, as evidenced by a level of significance < 0.05 and a high coefficient of determination (R2). The findings suggested that an optimal mixture, incorporating 12-15% MK and 20-27% POFA, could enhance the strength of concrete, meeting the criteria for optimization. The greatest improvement of HSC was achieved with a combination of 14.89% MK and 20.48% POFA. The enhancement of concrete strength was attributed to the pozzolanic reaction and the dense matrix resulting from the synergistic effect of MK and POFA.
Digitization Factor in Improving Planning Application System Delivery Between Local Authority in Malaysia
Authors: Ibrahim A K , Aminudin E , Pauzi N N M , Zakaria R , Hamid A R A , Zin R M , Roslan A F , Nasir S R M 
Published: February 2025

Abstract
Digitization significantly enhances the efficiency of project delivery in construction by improving decision-making, collaboration, and integrating advanced technologies like Building Information Modelling (BIM), Virtual Reality, Augmented Reality, and Artificial Intelligence. The Malaysian government has been leveraging digital technologies to streamline the planning application process and to reduce approval times. However, challenges remain, as stakeholders have reported negative feedback due to a lack of a holistic approach in critical areas of the planning application system delivery. This study examines the current implementation of planning application process among local authorities in Malaysia and identifying the factors that drive successful digital transformation. The research method, including surveys and interviews, the study identifies four key components crucial for digital planning applications: Leadership and Governance; Administration, Organization, and Management; Human Capacity, Capability, Culture, and Skills; and Infrastructure, Cyber Security, Privacy, and Resilience. Additionally, eight sub-components were identified as essential for improving digital planning application delivery. The findings highlight that while digitization enhances processing times, data accessibility, and stakeholder engagement, challenges like digital literacy and infrastructure gaps persist. This paper suggests a framework to address these challenges and further leverage digital technology in planning application system delivery.
Theoretical Studies: Analysis of the Types of Bricks in the East Java Province Based on the Geographical Location of the Region
Authors: Ichwanto M A , Al Ansyorie M M , Dewi V A K , Debytama G B , Tee Tze Kiong 
Published: February 2025

Abstract
In East Java, several types of bricks are commonly used: red bricks, lime bricks, and light bricks (hebel). This paper wants to analyze and provide other considerations to the public when using bricks, not only in terms of strength, ease of application, and cost but also paying attention to the geographical aspects of an area. This research uses quantitative methods and secondary data. The application and analysis are adopted from [1], who has two main components: data collection and data analysis. Each region in East Java has unique geographical characteristics, with areas with high humidity, high water content, and good fertility because they have volcanoes. That’s why brick types are used in three zones: the north, central, and south. Adopting these three zones is more suitable because they have informed the characteristics of each region in East Java.
Exploring the long-term impact of organic amendments on restored quarry soil microbial communities by shotgun metagenome sequencing.
Authors: Villafuerte Ana. B , Lopez Jorge , Soria Rocío , Comeau André M. , Ortega Raúl , Miralles Isabel 
Published: February 2025

Abstract
In quarries, human extractive activities degrade the soil’s physical and chemical qualities, affecting microbial communities. The application of organic amendments is known to improve the soil’s physical, chemical and biochemical properties, causing short-term changes in taxonomic composition and function of bacterial communities. The objective of this study is to determine the long-term effects of organic amendments applied to degraded quarry soils on the taxonomic composition and function of bacterial communities by shotgun metagenome sequencing (MGS). The study site is located in a limestone quarry in the Sierra de Gádor (SE, Spain). In 2018, five different organic amendments were applied to 15 experimental plots (three replicates per treatment): greenhouse waste compost (COHort), garden waste compost (COVG), WWTP sludge (SS), COHort+SS mixture, COVG+SS mixture and three unamended control plots (CON). Forty Stipa tenacissima L. Kunth plants were planted per plot. Five years after the amendments were applied, rhizosphere soil samples were collected for DNA extraction. Sequencing was performed on an Illumina platform and data analyzed using a custom Kraken2+MMseqs2 pipeline. Differential abundance tests were performed for important taxa/EC numbers/pathways and comparisons of richness and diversity (Kruskal-Wallis). The most abundant bacterial phyla in all samples were Proteobacteria, Actinobacteria, and Firmicutes. Five years after the incorporation of organic amendments, although clustering patterns were observed in the taxonomic distribution, no significant differences in richness and diversity were observed between treatments. This lack of significant differences suggests that after five years the bacterial composition could be influenced by factors such as bacterial dormancy and dispersal, “soil memory” or the influence of the plant on the rhizosphere microbiota. The restoration process seems to lead to a situation where soils present similar composition and diversity in terms of taxonomy, functions and metabolic pathways. This finding has important implications for the understanding of the long-term effects of soil management practices, highlighting the need to investigate the in-depth mechanisms behind this homogenization process.
Impact of soil and water salinity on Deglet Noor dates quality
Authors: Bedjaoui H , Mehaoua MS , Guellai F , Aissaoui D 
Published: February 2025

Abstract
The Ziban region in southeast Algeria is known for its soils, which have varying degrees of salinity, and where the date palm is mainly cultivated. This study aims to highlight the impact of soil and irrigation water salinity on Deglet Noor date quality criteria. Following field surveys in 2022, sampling sites were selected according to the variable degree of salinity observed in ten date palm groves, where the date samples each were collected from adult palms. Various physicochemical analyses were carried out on soil: soil pH (SpH), soil electrical conductivity (SEC), total (TL) and active limestone (AL), on water: water pH (WpH) and water electrical conductivity (WEC), and on dates: date length (DL), date weight (DW); pulp weight (PW), date diameter (DD), water content (WC), date pH (DpH), date electrical conductivity (DEC), total sugar (TS), reducing sugars (RS) and sucrose (S). The quality assessment was made according to the international standards. Our results showed that for irrigation water, the pH was slightly acidic to basic (WpH= 6.83-7.9), and salinity varied from high to extremely saline (WEC= 1.5-8.5ms/cm). The soil was moderately acidic to neutral (SpH=5.96.61), saline to highly saline (SEC= 1.25-3.4ms/cm), and slightly to moderately calcareous with total and active limestone values ranging from 3.82 to 9% and 13.2 to 20% respectively. An important variation was observed in dates morphological (DL: 3.70-4.42cm; DW: 9.01-14.39g; PW: 8.30-13.32g and DD: 1.71-2.13cm) and physicochemical characteristics (DpH: 5.56-6.78; DEC: 1.4-2.4ms/cm; WC: 1338%; TS: 50.6-71.9%; RS: 17.1-48.6% and S: 6.4-46.3%). Also, very strong correlations were evidenced between the characteristics of dates, soil, and water, particularly those related to the morphological traits and sugar nature. Finally, our study linked water and soil quality to date quality, which helps the farmer better decide on the site and cultivation practices before setting up a palm grove.
The effect of microplastics on the variability of functional parameters of available water in loessial soils
Authors: Ebrahimi Soheila , Doulgeris Charalampos , Karimpoor Roghayeh 
Published: February 2025

Abstract
Basic scientific research on microplastics and research paths on their fate in soil and water are essential for the studies of soil pollution in today’s world. However, our current knowledge of microplastics in soil is still not coherent, so it is necessary to create coherence, coordination and multi-faceted targeted studies for the sustainable management of soil ecosystems. In this paper, we examined the effects of soil texture in soils containing different weights of soil microplastics with special focus on water holding capacity. For this purpose, the effect of different weights of polypropylene microplastics, i.e. 0, 0.5, 1, 2 and 4 grams per kilogram of soil, on the amount of available water of three loess soil textures (silty loam, silty clay, silty clay loam) in a four-month period was evaluated. The experimental results showed the clear effect of microplastics on the water retention capacity in all three loess soil types under study, depending on the soil texture and weight doses of microplastics. The addition of microplastic concentration decreased the water holding capacity of silty clay soil to a greater extent than silty clay loam and silty loam. Thus, it seems that the addition of MPs to soils with higher clay content showed stronger effects on this soil property. This research showed the relationship between soil texture, weight doses of microplastics and soil functional parameters regarding soil water retention that may stimulate new ideas for future research and practical management practices for efficient application of water and fertilizers in agricultural fields of contaminated soils by microplastics.
The 5th Southeast Asian Conference on Geophysics (SEACG) 2024: Geophysics Role in Sustainable Energy, Environments, and Mitigation
Authors: Ry Rexha V. , Zulfakriza Z. , Gunawan Indra 
Published: February 2025

The Southeast Asian Conference on Geophysics (SEACG) is a biannual international event organized by the Department of Geophysical Engineering at the Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung (ITB), Indonesia. The vision of SEACG is to serve as an educational and research hub in Southeast Asia to advance high-quality and respected geophysical science and technology at both national and international levels. SEACG events have been successfully held in 2016, 2018, 2020, and 2022. The proceedings have been published in the IOP Conference Series: Earth and Environmental Science and are indexed by SCOPUS.
The first (2016) and second (2018) conferences were held offline in Bali, Indonesia, while the third (2020) was held virtually due to the COVID-19 pandemic. With the end of the pandemic, the fourth (2022) conference was held as a hybrid conference (physical and virtual), live from Bandung, Indonesia. More than 150 participants attended as presenters and audiences.
This year, we proudly invited national and international researchers, academics, practitioners, and students to submit and present their research at the 5th Southeast Asian Conference on Geophysics (SEACG) 2024. The conference was held on September 3 and 4, 2024, at the Patra Hotel & Convention in Cirebon, West Java, Indonesia. Cirebon is a strategic city where ITB is committed to developing a multi-campus (ITB Cirebon Campus) that prioritizes the advancement of research and education, contributing to the socio-economic development of West Java Java.
List of The Organizing Committee, Documentation are available in this pdf.
Novel Approach to Uncertainty Study of Microseismic Hypocentres Using Bootstrap and Monte Carlo Methods in the Patuha Geothermal Field
Authors: Wibowo Djoko Anityo , Delliansyah Rendy , Iskandar Chevy , Nurpratama Istiawan 
Published: February 2025

Abstract
Due to data acquisition and processing limitations, uncertainty is an inherent part of geophysics, which hinders the ability to capture Earth’s complex and variable nature. Geophysicists rely on assumptions, simplifications, homogeneity, and linearity to approximate and understand these natural phenomena, including modeling. Additionally, statistical methods are employed to assess the geophysicist’s probability of understanding these natural phenomena. The statistical method in this study is used to refine human-induced uncertainty derived from seismogram analysis software using Bootstrap and Monte Carlo. The Bootstrap method, a technique involving random sampling, is employed to estimate a new deterministic arrival time and its standard deviation. Subsequently, a Monte Carlo simulation is conducted, generating numerous samples of the latest synthetic dataset based on a Gaussian distribution. A sensitivity analysis is then performed using the hypocentre locating software. This study showcases an innovative approach that uses the uncertainty of a single standard deviation to provide lower X- and Y-axis (distant) errors compared to other uncertainty time windows. Bootstrap and Monte Carlo methods provide standard deviation values after manual picking using seismogram analysis software. Statistically, after the software runs, the uncertainty value is no more sensitive for an error distance lower than or equal to 100 meters. Within this error distance, the difference in the hypocentre location of different uncertainty values is less than 25 meters. Therefore, an error distance lower than or equal to 100 meters has a high confidence level.
Receiver Function Analysis of Mount Rinjani, Lombok
Authors: Romadhoni N. , Zulfakriza  
Published: February 2025

Abstract
Mount Rinjani is volcano located on Lombok Island which is also tectonically active. We estimate the depth of the Moho discontinuity beneath Rinjani Volcano and surrounding areas using receiver function analysis. Seismic stations were used in this study that recordings since 1 August 2018 to 9 September 2018 range of 30° - 90° and 6 – 9 Mw. We used the iterative time deconvolution method to identify the arrival times of the P wave phases, Ps and their multiple phases in the windowing range of -5 seconds before Tp and 25 seconds after Tp. Then, H-K Stacking technique was used to estimate the depth of the Moho profile and the Vp/Vs ratio. The depth of the Moho discontinuity layer and the Vp/Vs ratio values beneath the four seismic stations show that the average Moho depth ranges from 30 – 37,4 km and the Vp / Vs ratio is 1.70 - 1.764.
Estimation of Shear Wave Velocity (Vs) Using Earthquake Horizontal-to-Vertical Spectral Ratio (EHVSR) Method and Cianjur 2022 Aftershock Data
Authors: Pangestu Fernanda Daiva , Verdhora Ry Rexha , Zulfakriza Z. , Lesmana Aditya 
Published: February 2025

Abstract
A magnitude 5.6 earthquake that rocked Cianjur, West Java, Indonesia, on November 21, 2022, damaged infrastructure and claimed numerous lives. Due to signs of correlated faults in the region, the earthquake occurred at a depth of roughly 10 km. The study uses the Earthquake Horizontal to Vertical Spectral Ratio (EHVSR) approach to characterize the subsurface structure of the Cianjur area. EHVSR curves from the noise, S-wave, and coda-wave recording sections were generated by analyzing aftershock recordings from 19 measuring stations. The S-wave section displays results that suggest a thicker soft soil layer with a larger amplitude and a lower dominant frequency when compared to these sections. Nonetheless, the noise recording section curve and the coda wave section curve share a similar form. This resemblance suggests that the waves resonate at almost the same frequency or geological structure and flow similarly in the medium. Data on each measuring station’s S-wave component’s EHVSR curve is collected. A shear wave velocity (VS) profile is obtained by inverting the EHVSR curve. Although there is a small layer of soft soil in some places, Cianjur has a comparatively thick hard soil and soft rock structure, according to the results of the EHVSR curve inversion. The material is still somewhat variable at depths of 30 and 100 meters, showing signs of a less compacted layer beyond 500 meters; however, the material becomes more homogeneous and compacted. At a depth of 1000 m, an increase in VS indicates a denser and harder layer, possibly bedrock. Based on the classification, the study area has medium to hard soil.
Soil Classification Mapping by Vs30 MASW Measurements in Gorontalo City
Authors: Permana Dadang , Widiyantoro Sri , Persada Yoga Dharma , Habibah Nurfani 
Published: February 2025

Abstract
The city of Gorontalo, in the north of Sulawesi Island, has a relatively high potential for earthquake events. This condition is influenced by the meeting of three plates, namely the active subduction zone of the Sulawesi Sea trench, which is subducting to the south, and the Maluku Sea trench (Sangihe Trench), which is subducting to the west. Apart from that, the Gorontalo Fault on land, which is thought to pass through the city of Gorontalo, contributes to the potential danger of earthquakes. Therefore, microzonation studies are needed to analyze site effects in Gorontalo City. To obtain site effect characteristics in Gorontalo City, shallow seismic methods can be applied. In previous research for Sulawesi Island, there was a Vs30 map based on a geomorphological model. The map has a less detailed resolution because it is based on available lithological and topographic maps with limited resolution. In this study, Vs30 measurements were carried out through field geophysical surveys using the Multichannel Analysis of Surface Wave (MASW) method. The MASW survey principle is based on the Rayleigh surface wave propagation theory, where the waves are generated from the interaction of shear waves with the surface soil layer. 130 MASW measurement locations have been used for Gorontalo City to identify soil classifications in the area. The results of Vs30 measurements from a field geophysical survey using the MASW method show conformity with the results of previous research based on geomorphological classification. The spatial mapping results from this research even show a more detailed pattern than the results of previous research. In general, the entire city of Gorontalo mainly in the low land is composed of soft soil with Vs30 values ranging from 131.4 m/s to 173.6 m/s, especially in the area near Lake Limboto, in accordance with the ground formation formed by lake sediments. Apart from that, the area is classified as medium to hard, especially in the southern mountains, with a Vs30 of 1187.5 m/s, which indicates rock as the base of the ground surface.
Machine Learning Utilization for Waveform Denoising and Hypocenter Determination of Microseismic Event at Volcanic Geothermal Field
Authors: Suyadi Dimas Aditya , Zaky Dicky Ahmad , Mujihardi Bambang 
Published: February 2025

Abstract
Microseismic monitoring is essential for evaluating reservoir within volcanic geothermal field. Nevertheless, numerous waveforms with low Signal to Noise Ratio (SNR) often leads to the inaccurate picking of event arrival time and subsequent hypocenter determination. This study aims to employ machine learning for denoising to improve the SNR and automate the arrival time picking. To address this objective, we utilize python packages called DeepDenoiser and EQTransformer. Additionally, the hypocenter prediction was performed using the GaMMA (Gaussian Mixture Model Associator) function. Our methodology is applied to a dataset comprising 43 days seismic recordings from 11 to 26 dynamic station which is moved after weeks of recording resulting 156 station location at the vicinity volcanic geothermal field. Results indicate significant noise reduction achieved through the machine learning-based denoising process. Furthermore, the number of hypocenters increased, as we obtained 103 events, which is 30% higher than with ordinary processing. In conclusion, the utilization of machine learning techniques shows promise in advancing microseismic data analysis in volcanic geothermal environments. Further evaluation and refinement of these methods could lead to improved monitoring and understanding of reservoir dynamics in such settings.
The GGMPlus Global Gravity Data from the Geophysical Exploration Perspective
Authors: Ananda Riski , Arisbaya Ilham , Grandis Hendra 
Published: February 2025

Abstract
The recently available maps and data provided by the global gravity model with its GGMPlus product are highly praised for their apparent high-resolution characteristics (∼200 m). Researchers, mostly from Indonesia consider that the data from GGMPlus are equivalent to the gravity data in terms of geophysical exploration such that they can be directly used to infer the subsurface density distribution. The latter is obtained from semi-qualitative derivative analysis as well as more quantitative 2D or 3D modeling. In fact, the composite GGMPlus model incorporates information from various sources, i.e. from satellite-derived gravity data at very large scales to a very high-resolution topographic gravity effect based on SRTM data. This study aims to provide a new perspective on understanding the GGMPlus data in the context of geophysical exploration. In this paper, we emphasize that the apparent detailed anomalies from GGMPlus are essentially from the calculated or modeled gravity effect of topography that should be corrected to obtain the geological signal describing the subsurface. We compare gravity anomalies from satellite-derived data and observed ground gravity data with those from GGMPlus that have undergone proper adjustments or corrections. The results reveal that GGMPlus have a similar resolution to global gravity data, from which the GGMPlus was derived. Based on the basic principles that (i) models are only approximations of reality and (ii) data can only be measured, they cannot be created, the GGMPlus derived data cannot surpass excessively the resolution of the actually measured satellite gravity data. Therefore, proper processing and use of data from the GGMPlus model should be encouraged.