bluuebunny/crossref_metadata_2025_split huggingface dataset:
Automated Detection of Floating Wood Logs on River Surfaces using YOLOv5 Model for Flood Warning System
Authors: Donal O D , Kamarudin L M , Zakaria A , Azmi N 
Published: November 2023

Abstract
In Sabah and Sarawak, Malaysia, log transportation by rivers poses risks due to log fragmentation. This can obstruct water flow, causing navigation problems and flood risks during heavy rainfall. Current monitoring methods involve personnel at checkpoints but are slow. This project proposes an AI-based system using YOLO-v5 to detect intact logs and fragments on river surfaces. A dataset will be created by scraping websites and using Google Colab commands to download relevant keywords. Preprocessing includes data augmentation, contrast adjustment, noise reduction, and resolution standardization. The model is trained in Google Colab and integrated into a warning system using Thonny IDE. Performance metrics like precision, recall, F1 score, and confusion matrix are generated. By automating monitoring through AI, this project aims to improve safety and sustainability in Malaysian river log transportation.
A comparative study of dual cylinders and triangle bluff bodies for piezoelectric energy harvesting
Authors: Kazim M N F M , Zhe Y J , Harun Zambri , Nuawi M Z , Rasani M R , Rahman Y M N 
Published: November 2023

Abstract
The flow patterns behind tandem bluff bodies can be used to generate electricity in piezoelectric energy harvesters. The vortices and wakes that form behind the bluff bodies create a pressure differential, which can be used to deform a piezoelectric film. In this study, we investigated the performance of dual triangle and dual cylinder bluff bodies in tandem at varying Reynolds numbers, Re, and spacing ratios, D. We compared the flow patterns behind the two types of bluff bodies. Sixteen hot wire anemometers were placed at different locations to measure the velocity developed behind the dual bluff bodies in tandem. The results showed that the velocities behind the cylinder bluff bodies were initially higher than those behind the triangle bluff bodies at lower Re. This is because the cylinder bluff bodies create a more turbulent flow, which results in higher velocities at lower Re. The best distance between the two bluff bodies was 3D and 5D, where the output velocities were maximized at more than 12ms−1. However, for dual triangle, the velocities eventually became higher than those behind the cylinder bluff bodies at higher Re and lower separation ratios (1D and 2D). 3D was the best distance for triangle to produce a higher velocity pattern, and this was best observed when Re = 10k, which is the lowest inlet velocity set. The results of the experiments are expected to show that the dual triangle bluff bodies produce higher velocities than the dual triangle bluff bodies, which will lead to a higher amount of energy being harvested. The results show that the amount of energy harvested were increase with increasing Re and decreasing D. The information enhancement can be done with turbulence analysis which could lead to the development of more efficient and versatile piezoelectric energy harvester.
Control Algorithm for Two-Tank System using Multiparametric Programming
Authors: Zakaria A , Mid E C , Mohamed M F , Hussin M H M , Shaari A S , Ruslan E , Hadi D A , Masri M 
Published: November 2023

Abstract
The two-tank system consists of two connected tanks, where the goal is to control the liquid levels in both tanks by manipulating the inflow rates. This study proposes a control algorithm for a two-tank system based on multiparametric programming. In this work, the flow rate is determined using multiparametric programming. The simulation studies demonstrate the proposed work’s effectiveness by comparing its performance with and without noise. Results show accurate and robust regulation of liquid levels, minimizing control effort and making it suitable for systems with dynamic variations or parameter uncertainties. In conclusion, the implementation of multiparametric programming is able to estimate the value of the output for the control algorithm of the two-tank system.
Abnormal record of coastal horseshoe crab (Tachypleus gigas Müller, 1785) in Subang, West Java, Indonesia
Authors: Aini N K , Wardiatno Y , Mashar A , Effendi H 
Published: November 2023

Abstract
The xiphosurids are a typical chelicerae group with massive morphological, anatomical, biochemical, and ecological documentation. Despite this study, information about extant horseshoe crab abnormalities is underexplored, especially in the Indonesian region. Thus, this study aims to investigate the abnormal horseshoe crab in Subang, West Java. This research was conducted from January until February 2020 in Legon Wetan, Subang, West Java. Here, we only documented abnormalities of extant xiphosurids namely Tachypleus gigas. During the study, we greatly found extant abnormal xiphosurids by identifying 45 specimens with a wide range of abnormalities on the cephalothorax (prosoma), thoracetron (opisthosoma), telson, and appendages. The abnormal coastal horseshoe crab found also included adults (male and female) and juveniles ranging from 11.6 cm to 21 cm of carapace width. We note that the most common abnormal body parts are the cephalothorax and the thoracetron. Although the original cause may be unknown, the three main causes of the abnormality-inducing which are injuries such as self-injuries or fishing net injuries, physiologic developmental abnormalities or teratologies, and pathologies.
The effect of the abundance of venus clams (Gafrarium tumidum Röding, 1798) on sediment accretion in the sandy intertidal of Pari Island
Authors: Cintra A K A , Triana K , Firdaus M R , Ibrahim P S , Subandi R , Hernawan U E 
Published: November 2023

Abstract
Bivalves may play an ecological role as ecosystem engineers by changing sediment physical structure. As a filter/suspension feeder, they can produce biodeposits, and their burrowing activities can stir sediment. In this study, we investigated whether the abundance of Venus clam (Gafrarium tumidum Röding, 1798) influences sediment accretion in the sandy intertidal area of Pari Island, Indonesia. We created 18 plots consisting of nine defaunated and nine non-defaunated treatment plots. On each plot, 111-559 clams were deployed, and four pieces of one-inch PVC were planted randomly to see sediment elevation. Sediment accretion was measured by sediment elevation. Observations were carried out for seven months. At the end of the observations, clam abundances were 0-64 ind/m2 in the defaunated plots and 0-47 ind/m2 in the non-defaunated plots. The average sediment accretion in the defaunated plots was 0.98-3.3 cm, while in the non-defaunated plots was 1.95-4.43 cm. This study showed that the clam had no significant effect (p-value > 0.05) on sediment accretion in both plots as its abundance was insufficient to alter sediment. The sediment accretion occurred not caused by clam but by others such as sipuncula and physical oceanography factors in the research location.
Introduce invasive alien macrophytes species in Indonesia national priority lakes (study case: lake Rawa Pening, Sentarum, Tempe, Tondano, Sentani)
Authors: Kurniawan R , Ibrahim A , Prihatinningtyas E , Susanti E , Pratama TA 
Published: November 2023

Abstract
According to Presidential Regulation (Perpres) Number 60 of 2021, 15 lakes are classified as Indonesia’s national priority lakes. From 15 lakes, five of them are Tempe (South Sulawesi), Sentarum (West Kalimantan), Rawa Pening (Central Java), Tondano (North Sulawesi) and Sentani (Papua). Aquatic macrophytes are aquatic photosynthetic organisms that can be seen with the naked eye and actively grow periodically or permanently beneath, on, or above the water’s surface. The national priority lakes face upon invasive aquatic macrophytes. Therefore, their presence must be controlled. This research purposed to introduce invasive aquatic macrophytes in several of Indonesia’s national priority lakes. The aquatic macrophytes are recorded using a purposive sampling method with plots square (1x1 m2) and three replications. All aquatic macrophytes were documented, including species, family, population numbers, life forms and origin. The research from these five national priority lakes discovered a total of 10 families and 14 species of invasive aquatic macrophytes. The families were Pontederiaceea, Onagraceae, Polygonaceae, Lentibulariaceae, Araceae, Cyperaceae, Poaceae, Schropulariaceae, Alismataceae, Salviniaceae, and Hydrocharitaceae. The invasive aquatic macrophytes such as Monochoria hastata, Eichhornia crassipes, Persicaria barbata, Ludwigia adscendens, Utricularia aurea, Ludwigia perennis, Pistia stratiotes, Ludwigia peruviana, Cyperus odoratus, Panicum repens, Bacopa floribunda, Limnocharis flava, Salvinia natans, and Hydrilla verticillata. The research result can be used as guidelines for good lakes management.
Yellowstripe scad fishery (Selaroides leptolepis) in FMA 712: a short review
Authors: Widiyastuti H , Pane A R P , Mardlijah S , Fauzi Moh , Zamroni A 
Published: November 2023

Abstract
Small pelagic fish caught with mini purse seines (MPS) in the Java Sea has been exploited for a long time and causes resource sustainability. Policies in preserving natural resources require scientific studies that can provide management options. This research was conducted from March to July 2017 at PPN Pekalongan by recording catches and measuring fork length (FL). The composition of the MPS catch showed that 64% were small pelagic and dominated by Goldstripe sardinella (Sardinella gibbosa) 56.3%, Bigeye scad (Selar crumenophthalmus) 19.3%, and the scads (Decapterus spp) 12.3%, other species with small numbers including Yellowstripe scad (Selaroides leptolepis) by 2.5%. This Yellowstripe scad has a length of between 4.5-18.5 cm FL (average of 10.86 cm FL). The estimated natural mortality (M) is less than the fishing mortality (F). The level of exploitation (E=0.70) indicates that it is overfishing. The management operations that need to be taken to preserve the yellowstripe scad are by regulating the fishing area, determining the size of the allowed MPS nets, and limiting MPS attempts in the Java Sea.
Formulating a revitalization strategy for a sustainable mangrove environment with natural and human resource management
Authors: Suswadi  , Irawan N C , Esthi R B , Sari E N 
Published: November 2023

AbstractDamage to mangrove areas in Sayung District in the 1980s due to the conversion of mangrove forests into tiger shrimp ponds had a long-term impact. The problems that trigger the destruction of mangrove ecosystems are the loss of natural landscapes due to abrasion, accretion, and tidal flooding, as well as human, economic, and development activities. In recent years, the improper management of natural resources has begun to be realized, not only by local governments and stakeholders but also by the active awareness of the community. This study aims to develop a strategy for revitalizing the management and sustainability of mangrove ecosystem resources through a socio-ecological approach. The location selection method used a purposive method, while the sample selection used a simple random sampling method. Researchers using SWOT analysis will determine the formulation of the revitalization strategy. The cross-tabulation between internal and external factors results in aggressive strategic decisions and the horizontal integration of growth. The formulation of the revitalization strategy includes 1) The establishment of ecotourism and mangrove forest educational tourism; 2) the establishment of craft centers based on sustainable mangrove resources; 3) exhibition slots created by the community surrounding the mangrove ecosystem; 4) Natural product consumption in the private sector; 5) Ongoing promotion of coastal and river clean-ups in conjunction with community empowerment; 6) Seeds for pond fish, mini crabs, seaweed, and other aquatic life are available. 7) Traditional medicine based on mangrove germplasm; 8) Product marketing digitization to increase selling price and bargaining position; 9) Training in essential mangrove restoration; 10) Conservation and rehabilitation of mangrove ecosystems; 11) Tour guide training and modern education-promotion for the younger generation; 12) A labor-intensive program for the development and improvement of facilities and infrastructure; 13) Silvofishery training and implementation; 14) The establishment of a downstream business center and the incubation of the derivative service sector; 15) The formation of hygiene awareness groups and waste banks, as well as 16) Advanced training for unemployed human resources.
Economic valuation of ecosystem services trade-offs of tilapia cage culture farm and native capture fisheries in Lake Maninjau, Indonesia
Authors: Yuniarti I , Glenk K , Setiawan F , Novianti R 
Published: November 2023

Abstract
Research on the effects of cage aquaculture on native fish populations has revealed its negative and positive impacts. However, a separate analysis of its ecological and economic effects creates incomplete information for the decision-makers. Moreover, the inadequacy of time series data has caused challenges to knowledge-based decision-making in establishing new cage aquaculture sites, especially in low-middle income countries. We use the ecosystem services (ES) framework to analyse the synergy and trade-off of cage aquaculture to a native fish species, Gobiopterus sp. in Lake Maninjau, Indonesia, as an effort to provide comprehensive information to support local decision-makers and to fill the information gap. We engaged some modelling techniques such as the Maximum Entropy Model (MaxEnt) validated with field survey data, Bayesian Networks (BN), and Monte Carlo Simulation (MCS) in this research. The results show that cage aquaculture provides habitat services for the species and temporary forgone fish production due to the accelerated sulfur upwelling. The economic value of habitat provision reached 74,500 IDR per year per cage or 1,128 million IDR per year in 2017. Further, the average value of the forgone benefit of fish production in the current cage aquaculture business extends from more than 550 million IDR per year in the dry season to almost 600 million IDR per year in the rainy season. The results indicate that the negative impacts of cage aquaculture on the native fish population outweigh its benefit. The recommendation for management actions includes applying alternative aquaculture techniques and other technological interventions.
Link between shark and human in Tanjung Luar, East Lombok Regency, Indonesia
Authors: Sjafrie N D M , Oktaviyani S , Kurniawan W , Fahmi  
Published: November 2023

Abstract
The relationship between humans and sharks has existed for a long time, especially in shark utilization. Tanjung Luar is the largest shark and ray fishery in West Nusa Tenggara. The community’s dependence on shark and ray resources is very high in this location. This study aims to look closely at the performance of shark target fishing and utilization and to measure the acceptance of shark fishers to regulation. Data were collected in November 2021 using questionnaires, in-depth interviews, and snowball techniques. There were 15 respondents: eight fishers who caught sharks, three collectors that bought whole sharks directly from the fishers, and four processors who processed shark bodies into products. The results showed that the most extensive fishing grounds were the Southern Nusa Tenggara (60%), followed by Kangean (20%), Sulawesi (13%, and Savu Sea (7%).) The fishing gear used is drift longlines, with an average fishing duration of 15 days. The largest catch is usually obtained from June to September. There are 21 shark-targeting vessels, five collectors, and several shark body processors. Sharks provide a protein source and livelihood. This study revealed the history behind shark fishing by Tanjung Luar community, shark utilizations and fishers’ responses to the local government regulation on shark fishing management.
Determinant factors of community’s production and behavior in disposing domestic waste into the rivers: Case study of Kampungsawah Village, Bogor Regency
Authors: Afifah D N , Taryono  , Kurniawan F 
Published: November 2023

Abstract
Humans and aquatic biota need river as a vital source of water. River is mostly polluted by residential waste along the river. The producer of domestic waste, which are the communities are dynamic. It is required to know the determinant factors of community’s production and behavior in disposing domestic waste into the river. The study located in Kampungsawah Village, Bogor Regency. The independent variables are education level, amount of family members, level of knowledge, demeanor, habits and awareness, accessibility of the facilities, and the interval from respondent’s house to the river. Multiple linear regression and binary logistic regression are used for the data analyzation. Domestic waste production is influenced by the amount of family members, level of knowledge, demeanor, habits and awareness. The community’s behavior tendency to dispose domestic waste into the river is influenced by the interval of the respondent’s house to the river. The reason of community to throw their domestic waste into the river is because it is closer, easier, and more practical. The combination of the factors that determine the amount of waste production and behavior are different for each household. The complex and comprehensive policies and management are needed, which may differ in each residential area.
Species preference for seagrass restoration using vertical distribution model in Tidung Island, Indonesia
Authors: Darus R F , Nugraha A H , Kurniawan F , Adrianto L , Romadhon A , Sjafrie N D , Triyono T 
Published: November 2023

Abstract
Tidung Island is one of the small inhabited islands and a tourist destination that allows the degradation of seagrass meadow and requires physical restoration using transplantation techniques. The seagrass species’ preference suitability needs to assess with this island for this case. This study aims to provide information on species that are possible to choose in seagrass transplantation based on their growth zones. The number of seagrass species, depths, and types of substrates was taken using seagrasswatch guideline by line transects along the coast to the reef slope with 10% plot intervals from the total length of the transect. Seagrass growth is divided into three zones: near the coast (back), middle, and near the reef slope (front). Enhalus acoroides, Cymodocea rotundata, and Thalassia hemprichii were found in almost all zones. Halophila ovalis, Halophila minor, and Halodule uninervis were distributed in the middle to front zone, while Syringodium isoetifolium was only in the middle zone. These findings suggest that transplant areas with high anthropogenic disturbances can use Enhalus acoroides and Thalassia hemprichii because they have the persistent trait. Meanwhile, the areas with low anthropogenic disturbance and low nutrients can use Halophila spp. and Halodule spp., because they can grow shoots and recover quickly.
Characterization and identification of extracellular polysaccharides-degrading enzymes (epes)-producing marine sediment bacteria
Authors: Bondar K G , Sibero M T , Yudiati E , Zilda D S , Murwani R 
Published: November 2023

Abstract
The utilization of polysaccharide-degrading enzymes (EPEs) from bacteria has been increasing, therefore many studies are exploring new producers of EPEs. This study aimed to screen and identify the EPEs-producing marine sediment bacteria collected from Panjang Island, Jepara. A total of 11 bacteria were isolated from the sediment sample. Further, seven strains were selected to conduct further analysis, such as biochemical test and screening of enzyme activity. According to the calculation of enzyme activity index (EAI), it was noted that strain with given codes PP.K.15, PP.K.21, PP.K.6, and PP.K.20 demonstrated potential for carrageenase, alginate-lyase, amylase, and agarase. In addition, molecular identification using 16S rRNA gene sequencing discovered that PP.K.6 was identified as Basillus safensis, PP.K.11 as Sinomicrobium oceani, PP.K. 20 as Salinicola zeshunii, PP.K 15 and PP.K. 21 as Micrococcus luteus, and PP.K 22 as Qipengyuania flava.
Violation of Bell’s inequality for helical Mathieu–Gauss vector modes
Authors: Medina-Segura Edgar , Mecillas-Hernández Francisco I , Konrad Thomas , Rosales-Guzmán Carmelo , Perez-Garcia Benjamin 
Published: November 2023

Abstract
Vector beams display varying polarisation over planes transversal to their direction of propagation. The variation of polarisation implies that the electric field cannot be expressed as a product of a spatial mode and its polarisation. This non-separability has been analysed for particular vector beams in terms of non–quantum entanglement between the spatial and the polarisation-degrees of freedom, and equivalently, with respect to the degree of polarisation of light. Here we demonstrate theoretically and experimentally that Mathieu–Gauss vector modes violate a Bell-like inequality known as the Clauser–Horn–Shimony–Holt–Bell inequality. This demonstration provides new insights on the violation of Bell inequalities by a more general class of vector modes with elliptical symmetry.
From statistical physics to social sciences: the pitfalls of multi-disciplinarity
Authors: Bouchaud Jean-Philippe 
Published: November 2023

Abstract
This is the English version of my inaugural lecture at Collège de France in 2021. I reflect on the difficulty of multi-disciplinary research, which often hinges on unexpected epistemological and methodological differences, for example about the scientific status of models. What is the purpose of a model? What are we ultimately trying to establish: rigorous theorems or ad-hoc calculation recipes; absolute truth, or heuristic representations of the world? I argue that the main contribution of statistical physics to social and economic sciences is to make us realise that unexpected behaviour can emerge at the aggregate level, that isolated individuals would never experience. Crises, panics, opinion reversals, the spread of rumours or beliefs, fashion effects and the zeitgeist, but also the existence of money, lasting institutions, social norms and stable societies, must be understood in terms of collective belief and/or trust, self-sustained by interactions, or on the contrary, the rapid collapse of this belief or trust. The appendix contains my opening remarks to the workshop ‘More is Different’, as a tribute to Phil Anderson.