bluuebunny/crossref_metadata_2025_split huggingface dataset:
Size distribution, length-weight relationship and condition factors of sailfin catfish (Pterygoplichthys pardalis, Castelnau, 1855) which is an invasive species caught using spear gun in Lake Matano, South Sulawesi
Authors: Nasution S H , Safiuddin  , Akhdiana I , Wahyuddin  , Peruge J 
Published: December 2024

Abstract
Lake Matano is located in the Sorowako area including the ancient lake which is a tectonic lake that composes the Lake Malili complex. Found 14 species of fish endemic to Lake Matano. It is estimated that the alien fish species is Sailfin catfish (Pterygoplichthys pardalis) have been entered into the waters of Lake Matano, which would threaten the existence of endemic fish inhabitants of Lake Matano. The purpose of this research is determining the size distribution, the length-weight relationship, and the condition factors of the Sailfin catfish. The research was conducted at Lake Matano in November 2020, January 2021, September 2021, May 2022 and December 2022 at eight locations by catching the fish by divers using spare guns. The results showed that the total length and weight in min-max on 2020 is 52-60 cm and 1050-1210 g, on Jan 2021 is 52-60 cm and 1000-1210 g, on September 2021 is 54-60 cm and 1020-1210 g, on Mei 2022 is 54-60 cm and 770-1240 g, and on December 2022 is 52-60 cm and 1000-1210 g. The growth pattern of the Sailfin catfish is allometric negative, the growth in length is faster than the growth in weight. Condition factors ranged from 1.0002–1.0059. Sailfin catfish were found along the edges of the fishing grounds and the most were found in January 2021 as many as 1000 individuals.
Zooplankton community structure in Batanghari riverine systems
Authors: Toruan R L , Nasution S H , Sukmono T , Kurniawan R , Imroatushshoolikhah  , Listyarini D 
Published: December 2024

Abstract
The Batanghari River flows from the province of West Sumatra into the West Coast of Jambi, covering a distance of approximately 870 km. Within the Batanghari watershed, diverse habitats have been recognized, including riverine channels, floodplains and oxbow lakes. These distinct habitats provide unique niches for a highly diverse aquatic biota, including zooplankton. This study focused on investigating the zooplankton community structures within the Batanghari riverine systems. The research employed a snapshot sampling methodology, in which each sampling station was visited and sampled for zooplankton community once during the study period in both April 2021 and September 2022. Zooplankton samples were obtained by filtering at least 100 litres of water from three different habitats: the main river channel, tributaries river dan oxbow lakes, using a 56-µm plankton net. Subsequently, the collected samples were preserved in 4% formaldehyde solution for further analysis. Zooplankton enumeration and identification were carried out using a compound light microscope and were grouped into three main zooplankton groups: copepods, cladocerans and rotifers. A total of 49 zooplankton species were identified from various habitats along the Batanghari River in which rotifers group were the most dominant taxa. Within this group, the Brachionidae family stood out as the most dominant across all type of habitats. No cladocerans were identified from the main river channels as these habitats are characterised by strong currents which can have unfavourable effect on cladocerans zooplankton. This group is adapted to a slower-moving section of the riverine environments, such as the floodplain and oxbow lakes. In these areas, a more diverse community of cladocerans and other microcrustacean, including copepods, were observed.
Assessing vertical chlorophyll-a distribution in Lake Batur: A spectrophotometric calibration of CTD data logger measurements
Authors: Rahmadya A , Kartini N L , Setiawan F , Rustini H A , Sunaryani A , Santoso A B , Nomosatryo S 
Published: December 2024

Abstract
One important ecological parameter in lake management is chlorophyll a. However, precise quantification of Chlorophyll-a (Chl-a) concentrations is crucial for ecological research and assessing water quality. Chlorophyll-a data measured using CTD still require calibration and cannot be directly utilized. This study presents a robust calibration method for Chl-a measurements obtained from CTD data loggers, enhancing data reliability. The observation was performed by conducting a series of calculations to determine the relationship between two chlorophyll-a concentrations measured from the spectrophotometric and fluorometric methods in Lake Batur. The result showed that the linear regression analysis revealed a strong positive relationship between Chl-a concentrations from both methods (R2=0.828). This relationship facilitated the correction of Chl-a measurements from the fluorometric method. Fluorometric measurements depict a gradual increase in chlorophyll-a concentration from the surface to the Secchi depth, followed by a decline to near-zero levels below 20 meters in Lake Batur. Examining the vertical distribution of Chl-a challenged conventional understanding, as Chl-a concentrations remained high below the euphotic depth. This anomaly may result due to this method still measuring Chl-a in dead phytoplankton, prompting further investigation. Moreover, calibrated Chl-a measurements were employed to assess Lake Batur’s trophic state, classifying it as meso-eutrophic to eutrophic based on Chl-a concentrations. This research contributes to enhancing data accuracy and promoting scientific understanding of aquatic environments, bridging the gap between data acquisition and ecological interpretation. These findings provide a foundation for policymaking in comprehensive lake management.
Correlation between population growth and land use change: a study in the catchment area of Singkarak Lake, West Sumatra
Authors: Hakim A M Y , Ridwansyah I , Sencaki D B 
Published: December 2024

Abstract
Many studies state that one of the anthropogenic impacts that directly affects the environment is population growth. Population growth is an undeniable and inevitable global phenomenon. It has significant implications for various aspects of human civilization and the environment, one of which is land use patterns. The relentless growth of the world’s population puts enormous pressure on the utilization and distribution of land resources. Along with demographic shifts in rural areas and accelerated urbanization, land use patterns undergo substantial transformation. Therefore, this study aims to measure the correlation between population growth and land use change using the Pearson correlation method. Data on the number of inhabitants was obtained from the Central Bureau of Statistics; meanwhile, the land use maps were obtained from the classification of Landsat 8 OLI satellite images that were processed in Google Earth Engine. The research location was carried out in the Catchment Area of Singkarak Lake, West Sumatra with a range of data use from 2013 to 2022 (10 years). The outcome indicated a Pearson correlation coefficient of 0.979. This study ultimately reinforces the assertion regarding the strong correlation between population growth and land use change, particularly in the context of urban expansion.
Monitoring tools to support ecosystem restoration: Insight from limited data in a floodplain area
Authors: Yulianti M , Apip  , Verawati D 
Published: December 2024

Abstract
Generally, the importance of monitoring tools in watershed management, particularly ecosystem restoration strategies, has been widely recognized. However, fewer studies have been conducted in areas with limited data. This study aimed to describe the effectiveness of restoration-associated projects linked to monitoring plan-based. First, we used a literature review to analyze various restoration projects developed in some countries. In most cases, the key to successfully implementing restoration strategies involves continued pre- and post-monitoring data. Next, we discuss a case study of developing restoration approaches in a floodplain area of the Batanghari watershed, Sumatra, Indonesia, with more data availability necessary. Our results highlighted that spatiotemporal analysis based on long-term hydrological data is one of the essential baselines required for sustainability management. Several improvements related to monitoring approaches need to be conducted in the Batanghari watershed, including an increase in the number of representative monitoring, time frames of monitoring (continuous and seasonal basis), automatization of monitoring methods, and strengthening community participation in monitoring through citizen science. To conserve or restore floodplain ecosystems, monitoring should be an essential component of the restoration strategies plan that needs to be integrated with the decision-making process in the context of watershed scale.
Shrinkage and decreasing of lake water levels in Laut Tawar Lake, Aceh Province
Authors: Azwir  , Azizah C , Satriawan H , Ernawita  , Ridwansyah I , Robo S 
Published: December 2024

Abstract
Cases of water level decrease and lake shrinkage have been found in almost every freshwater ecosystem. In Indonesia, Laut Tawar Lake in Upland Gayo, Indonesia, allegedly has experienced the shrinkage of surface area and water level decrease. This study aimed to identify the shrinkage area and water level decrease, and its driving force. We make use of the remote sensing data, which is processed by ArcMap Geographic Information System to capture the lake shrinkage and the land use dynamic surrounding the ecosystem. Land cover were captured by interpreting Landsat data, which we further calibrated and validated with approximately 119 ground checkpoints on the lakeside. For the water level analysis, we conducted field measurements of the water line from 41 measurement points surrounding the lake area. To analyze rainfall and temperature, we use Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) data. Our study found approximately 2.4 percent or equal to 1.4 km2 of lake shrinkage in 35 years. Water level decrease occurs for 0.6 m and 1.3 m in 2022 and 2023, respectively. The shrinking was mainly caused by reclamation and sedimentation, while the water level decrease was mainly triggered by a massive reduction of water flow from rivers which reduced from 40 to 14 streams, accounting for 65% from previous years. These events were affected by land use change and temperature increase. This study offers a scientific finding to unravel the allegation of the shrinking of Laut Tawar Lake for lake conservation effort and environmental management in the future. Sustainable lake management was highly advised as part of conserving the study area as the biggest lake in Aceh Province.
Discovery of Yankaw in Calamba City, Laguna, Philippines: Reported and literature review (1914-2022)
Authors: Sandoval K L , Marundan D M M , Silva N A 
Published: December 2024

Abstract

Yankaw, composed of Camachile or kamatsili (Pithecellobium dulce) branches, is used as traditional fishing gear which has been an essential tool to several freshwater activities in Laguna de Bay, specifically in Calamba City, Laguna. Despite its prominent use, there is still an insufficiency of published local information on Yankaw including the local knowledge of the fisherfolks, nor its etymology, biology, ecology, and history. The related data on Yankaw reported in different articles and documentary film from 1914-2022 were discussed, showing a wide dialogue of the local knowledge in the City of Calamba, Laguna. The available scientific information from 1914-2022 was summarized to obtain a general overview and identify key issues related to the etymology of Yankaw. The primary information used for analysis was the deep-rooted references gathered, the secondary information for conducting interviews was the recent documentary film. A total of 5 local names compared to Yankaw namely: (1) Rama (Northern Luzon), (2) Gango (Panay Island), (3) Pyromaia tuberculate (Central Visayas), (4) laktaw (Hispanic Tagalog Dictionary), and lastly (5) Yanka or Yenka (Hausa Dictionary). There was also diversity of plankton species in Yankaw Fish Garden that needs to verify for proper confirmation. This emphasizes the need to consider accounting for the historical accounts of Yankaw as a local knowledge in the Philippine National Museum which may significantly impact the country in preserving the history and traditional practices in the Philippines. Such insights are beneficial to the continuity of these practices for the future generations.
Transition of piezoresistive gauge factor tuned by lateral size in MoS2 and WS2 networks
Authors: Olaya-Cortes D , Navarrete C , Rubio T , Giraldo-Gallo P , Hernandez Y 
Published: December 2024

Abstract
Transition metal dichalcogenides (TMDs) are a family of layered two-dimensional materials which find great interest in fields such as medicine, energy conversion, water treatment, and electronics. Nevertheless, the interesting properties that arise as the number of layers is reduced, do not necessarily persist when the nanosheets are printed on substrates to form networks. Therefore, research on the networks and the influence of the nanosheets’ dimensions is valuable for scaling up prospects. It is known that strain alters the band structure of TMDs and also tune transitions between different crystal structures. The figure of merit that measures how much the resistivity changes when strain is applied is the gauge factor (GF). In networks, this is modeled as a sum of the nanosheet intrinsic GF and the change of the junction resistance between nanosheets due to strain. In this work we obtain the GF of devices printed on polyvinylidene fluoride membrane filters through their transport characteristics when applying uniaxial strain, both at a tensile and a compressive setup, by using a three-beam bending machine. We report a transition from a positive GF to a negative one, when applying uniaxial strain to WS2 networks as the lateral size increases, and a transition from negative GF to a positive one, when compression is applied to MoS2 networks as lateral size increases.
Examining the impacts of input factor application, production efficiency, and inefficiency model on maize yield: employing the stochastic frontier model in search of more efficient ways in managing maize farming
Authors: Salam Muslim , Amir Ayu Anisa , Tenriawaru A Nixia , Jamil Muhammad Hatta , Fudjaja Letty , Samma Muhammad An-Nashrullah K , Muslim Ahmad Imam , Ali Hamed Noralla Bakheet , Ridwan Muhammad 
Published: December 2024

Abstract
Maize is a significant food crop in Indonesia’s agricultural development endeavors. In South Sulawesi Province, Bantaeng Regency is one of the regencies that developed corn farming with a large land area. This study aimed to examine the impact of input application on maize yield and assess the degree of efficiency and inefficiency in maize farming. The study was conducted in Bantaeng Regency, utilizing a sample size of 180 households engaged in maize farming as the primary data collection method. The data collected was analyzed using the Stochastic Frontier Cobb-Douglas Model, Technical Efficiency Analysis, Allocative Efficiency Analysis, Economic Efficiency Analysis, and Inefficiency Model. The findings indicated that the variables of land area, seed application, urea fertilizer, insecticide, and herbicide exhibited a significant positive impact on yields of maize. Conversely, the variable of NPK fertilizer had a significant negative impact. In the meantime, it is observed that the labor variable demonstrates a negative impact. The observed values in technical (0.544), allocative (1.840), and economic (1.001) suggest that maize cultivation has not attained technical, allocative, or economic efficiency. Meanwhile, it was also found that the variables significant positive to the technical inefficiency of maize farming are farming experience and education level. Therefore, in a short-term perspective, from a technical-managerial perspective, expanding the area of land under management, increasing the volume of seeds, urea fertilizer, insecticides, and herbicides to the optimum use is the right choice and an effective way for farmers to increase maize production. On the local government side, reviewing the price of certified seeds, subsidizing the price of maize seeds, ensuring the availability of urea and NPK fertilizers, insecticides, and herbicides, and intensifying extension activities and technical guidance on maize cultivation are alternative agricultural policies that the government can implement to support the efficiency and effectiveness of maize farming management.
A dual-purpose novel converter for optimized hybrid energy system
Authors: Agrawal Nikhil , Agarwal Anshul , Kanumuri Tirupathiraju 
Published: December 2024

Abstract
In numerous countries, power shortages have become a significant issue due to the escalating demand for electricity, surpassing the capabilities of traditional energy generation methods. To address this challenge, there is a growing reliance on hybrid energy systems. These systems present a solution by integrating multiple energy sources, effectively meeting the load demand. However, conventional hybrid energy systems typically involve multiple power conversion stages and require multiple power converters, which increase energy losses and reduce overall system efficiency. To address these issues, this paper proposes a novel single-stage dual-source converter for hybrid energy systems. The proposed converter serves a dual purpose by catering to both AC and DC loads. Unlike conventional systems, which require multiple conversion stages, this converter integrates the AC and DC nature of power sources into a single-stage solution. A control switching algorithm is designed to seamlessly switch between power sources enabling the use of either source independently or both simultaneously to ensure an uninterrupted power supply to the load. The proposed converter demonstrates versatility by seamlessly operating on AC source, DC source, or a combination of both. It dynamically adjusts its operating mode in response to fluctuations in power availability. This converter can operate as DC-AC converter, AC-DC converter, and can use AC and DC power directly with the help of a unique waveform. The converter with different operations has been analysed using MATLAB/Simulink software. The proposed converter demonstrated superior performance, achieving impressive THD of just 0.18% when powered solely by AC and 5.71% when powered by a mix of AC and DC. This proposed converter provides a promising approach with the potential to address the evolving needs of modern power systems. The proposed converter is suitable for renewable energy integration and applications in remote areas, where reliable and efficient power supply is critical.
Custom multi-component force transducer design using topology optimization
Authors: Kyun Sung Myung , Lee Soobum , Burns Devin Edward , Persia Jude Thaddeus 
Published: December 2024

Abstract
This paper proposes an innovative design framework for a multi-component force transducer subject to reversible load direction using topology optimization. Multi-component force transducers are used widely in industries ranging from robotics to healthcare. In this work, the proposed design framework is applied to a specific force transducer, a wind tunnel balance used within aeronautic ground testing. The axial component is one of the six components of the wind tunnel balance, and this component is difficult to design because the axial force is typically much smaller than other force components. This paper uses topology optimization to obtain a non-intuitive axial component design. To realize the design requirements, a new design formulation is suggested to amplify the gauge reading under a small axial loading and to suppress the gauge reading under nonaxial loadings. Prototypes are manufactured and their performances are experimentally verified. The proposed framework can be applied to any type of force transducer that needs to amplify a response from a certain force and to suppress the other responses.
STCGAN: a novel cycle-consistent generative adversarial network for spatial transcriptomics cellular deconvolution
Authors: Wang Bo , Long Yahui , Bai Yuting , Luo Jiawei , Keong Kwoh Chee 
Published: December 2024

Abstract

Motivation
Spatial transcriptomics (ST) technologies have revolutionized our ability to map gene expression patterns within native tissue context, providing unprecedented insights into tissue architecture and cellular heterogeneity. However, accurately deconvolving cell-type compositions from ST spots remains challenging due to the sparse and averaged nature of ST data, which is essential for accurately depicting tissue architecture. While numerous computational methods have been developed for cell-type deconvolution and spatial distribution reconstruction, most fail to capture tissue complexity at the single-cell level, thereby limiting their applicability in practical scenarios.

Results
To this end, we propose a novel cycle-consistent generative adversarial network named STCGAN for cellular deconvolution in spatial transcriptomic. STCGAN first employs a cycle-consistent generative adversarial network (CGAN) to pre-train on ST data, ensuring that both the mapping from ST data to latent space and its reverse mapping are consistent, capturing complex spatial gene expression patterns and learning robust latent representations. Based on the learned representation, STCGAN then optimizes a trainable cell-to-spot mapping matrix to integrate scRNA-seq data with ST data, accurately estimating cellular composition within each capture spot and effectively reconstructing the spatial distribution of cells across the tissue. To further enhance deconvolution accuracy, we incorporate spatial-aware regularization that ensures accurate cellular distribution reconstruction within the spatial context. Benchmarking against seven state-of-the-art methods on five simulated and real datasets from various tissues, STCGAN consistently delivers superior cell-type deconvolution performance.

Availability
The code of STCGAN can be downloaded from https://github.com/cs-wangbo/STCGAN and all the mentioned datasets are available on Zenodo at https://zenodo.org/doi/10.5281/zenodo.10799113.
Superprotonic conduction of {NBu4–n(enOH)n}[MnCr(ox)3] (Bu = n-butyl; enOH = 2-hydroxyethyl; n = 1–3) in successive multiplication of hydroxyl proton-carrier in the cation
Authors: Ōkawa Hisashi , Yoshida Yukihiro , Kitagawa Hiroshi 
Published: December 2024

Abstract
Proton conduction in a new series of 2-dimensional metal-organic frameworks, {NBu4–n(enOH)n}[MnCr(ox)3] (n = 1: (B3O)MnCr; n = 2: (B2O2)MnCr; n = 3: (BO3)MnCr), was studied with respect to their molecular and network structures. Crystallographic studies revealed that (B3O)MnCr consisted of honeycomb-based oxalate-bridged bimetallic [MnCr(ox)3]− sheets with {NBu3(enOH)}+ ions intercalated in between. The enOH group was inserted into the cavity of the honeycomb sheet and the hydroxy group protruded out of the cavity to form a hydroxyl-face on the sheet, which played a pivotal role in proton conduction via the vehicle mechanism under low relative humidity. Under high relative humidity conditions, water adsorption modified the hydroxyl-face such that a hydrogen-bonding network was formed, which mediated proton transfer via the Grotthuss mechanism. The proton conductivities (σ) of (B3O)MnCr and (B2O2)MnCr at 25 °C under 95% relative humidity were 6.2 × 10−5 and 6.7 × 10−4 S cm−1, respectively, which increase to 1.7 × 10−4 and 2.0 × 10−3 S cm−1, respectively, with increasing the temperature to 50 °C. (BO3)MnCr deliquesces under the same conditions; however, the σ value under 70% relative humidity was higher than those of (B3O)MnCr and (B2O2)MnCr, primarily because of the further introduction of the enOH group in the cation.