bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improving the efficiency of dust collectors and modernization of the aspiration system in cotton cleaning plants
Authors: Alieva R , Olimova N 
Published: March 2023

Abstract
On the basis of MPC of substances in the atmospheric air the values of maximum permissible emissions (MPE) are established, which ensure compliance with hygienic standards in practice. One of the ways to reduce emissions of dust and other pollutants into the atmosphere is the introduction of modern or two-stage equipment for cleaning pollutants. The results of the analysis show that the efficiency of dust extraction at the surveyed enterprises has decreased. It is possible to improve the efficiency of existing dry mechanical dust collectors, i.e., to install additional filters or to install modern electronic filters.
Sensor BMP280 Statistical Analysis for Barometric Pressure Acquisition
Authors: Kusuma Hollanda Arief , Oktavia Desi , Nugaraha Sapta , Suhendra Tonny , Refly Septia 
Published: March 2023

AbstractBMP280 sensor is widely used to measure air pressure. Accuracy and precision are parameters used to indicate the performance of a sensor. This study examined the BMP280 sensor performance by measuring the air pressure on 15 sensors compared with BMKG devices as a reference standard. This measurement was conducted in BMKG class III Tanjungpinang from 20-22 May 2022. BMP280 Sensor performance analysis was performed using a statistical analysis one-way ANOVA method, Tukey test, linear regression, and root mean square error. Based on the results of one-way ANOVA, it is found that there is a BMP280 sensor that is different from the others. The Tukey test found that ID sensors 6 & 14 are not significantly different, ID sensors 1 & 4 are not significantly different, sensors 15 & BMKG are not significantly different, and sensors 3 and 9 are not significantly different. In addition, the results of linear regression and RMSE show an increase in the accuracy of the BMP280 sensor reading. Linear regression makes sensor measurement more accurate due to the small RMSE value.
Maritime Community Food Security: Case Study of Meranti Sago
Authors: Swastiwi Anastasia Wiwik , Febby Febriyandi YS , Simbolon Gulmok 
Published: March 2023

Abstract
The threat of a food crisis due to the COVID-19 pandemic in the last two years has become a national issue. It is necessary to build a food system that is in accordance with the potential of local resources as a substitute for rice, namely sago. One of the foodstuffs recorded in Indonesian history to date is Sago Meranti which is produced in Meranti, Riau Province. However, now sago is no longer a staple food there. This study aims to find out how the history of sago processing in the lives of the Meranti people and its potential as a supporter of food security for maritime communities in the present and in the future. This study uses an approach through four stages of work, namely heuristics, source criticism, interpretation and historiography. The results of this study indicate that sago has been the staple food of the Malay Meranti community in the past, but the tradition of eating sago in the Meranti community is getting worse. This is due to the incessant food security program that relies on rice, changes in the Meranti community’s relationship with sago, and the community’s underdeveloped sago processing technology. The potential of sago as food security alternative for maritime communities.such as meranti or even in the national level can be realized through government policies that declare sago as a healthy staple food, and support the development of a community-based sago processing industry in Meranti.
Silica sand distribution and their corelation with sediment characteristics in Tanjung Berikat waters, Central Bangka
Authors: Zulfikar Muhammad , Muljana Budi , Sjafri Ildrem 
Published: March 2023

Abstract
Bangka Belitung has known as Island that is traversed by the Southeast Asian granite belt. Tanjung Berikat waters are one of the waters in Central Bangka Regency that is traversed by the Southeast Asian granite belt, so it has various potential mineral placers such as silica sand (that showed by quartz content). This study aims to determine the content and distribution of quartz minerals, sediment grain size, bathymetry, and the correlation between these variables with each other. We used shallow reflection single channel seismic and surficial seabed sediment sampling. Data processing and analysis consist of processing signals and seismic data interpretation, sieve grain mineralogy analysis, and grain size analysis. The correlation test was carried out on the distribution of quartz minerals, sediment grain size, and bathymetry using the Pearson correlation test. The results of the Pearson correlation test generally have a strong correlation between the distribution of quartz minerals with bathymetry and sediment grain size. This occurs because quartz distribution in the study area is a product of sediment supply originating from the mainland Klabat Granite rocks.
Formulation of Fuel Oil Consumption Estimation on The Fishing Vessels Through The Gill Net and Bubu Fishing Gears for Evaluating Fuel Subsidies in Bintan Regency - Indonesia
Authors: Saputra Henry , Fathallah Aguk Zuhdi Muhammad 
Published: March 2023

Abstract
The largest percentage of expenditure in fishing operations using motor boats is Fuel Oil (BBM) which amounts to 40-50% of total operating costs. Inorder to ensure the smoothness and accuracy of the distribution of subsidized fuel for fisheries businesses, the Ministry of Marine Affairs and Fisheries issued Ministerial Regulation KP No.13 of 2015 concerning guidelines for the implementation of the issuance of recommendation letters for the purchase of certain types of fuel oil for capture fisheries businesses. In this study, an evaluation of the formulation was carried out to determine the estimated consumption of fuel subsidies on fishing vessels measuring 10-30 GT with Gill Net and Bubu fishing gear in Bintan Regency. In the calculation process, the estimated fuel consumption for fishing vessels must consider several aspects, namely the type of fishing gear, the distance to the fishing location, the power on the main and auxiliary engines, as well as the fuel coefficient and specific gravity used. Therefore, it is necessary to estimate fuel consumption by calculating the operating mode on each type of fishing gear. This is intended as an effort to provide a more precise estimate of fuel consumption.
The method used in determining fuel estimates is with two different scenarios. In scenario I, the calculation of fuel consumption uses the formulation of Permen-KP No. 13 of 2015, with the formula used in the main engine is the power of the main engine, namely the Cfo and the duration of the capture operation per trip, while for the estimated measurement of the consumption of auxiliary machines, it is calculated 20% of the estimated fuel of the main engine. On the other hand, based on scenario II, the formulation of fuel consumption estimates still uses the formulation of Permen-KP No. 13 of 2015, but the evaluation is carried out by adding calculations of the catch operation time according to the type of Gill Net or Bubu fishing gear, the distance to the capture location, and the power of the auxiliary machine used. The results of this study found that there were differences in fuel consumption in the two types of fishing gear in each scenario. In scenario II, a ship using Gill Net fishing gear requires a greater fuel consumption of 44% thana ship with Bubu fishing gear. In addition, scenario II recommends adding 43% fuel for Gill Net ships and adding 39% fuel for Bubu ships. With this scenario II modeling, theproduction contribution obtained during the application of scenario II increased by 15% on the Gill net fishing gear and 17% on the Bubu fishing gear.
Analysis of Heavy Metal Contents (Cu. Pb And Zn) of Coral Annual Band (Porites Lutea) in the Eastern Part of Bintan Island
Authors: Ananda Dedet , Mulyono Asep , Putra Risandi Dwirama , Syakti Agung Dhamar 
Published: March 2023

Abstract
This study analyzed the growth rate of massive corals Porites lutea and heavy metal contents in its annual band. The aims of this study were to perceive the age of corals, relation between growth rates and sea surface temperature, rainfall, and duration of sunlight as well as the heavy metal (Cu, Pb and Zn ) extent in their annual band. This study was conducted with radiographic approach to determine the direction and the annual band of corals. Sample preparation methods contained determining the annual growth direction, cutting the samples, and dissolving the coral samples. The prepared samples were analyzed using AAS to calculate their Cu, Pb and Zn concentrations. The results showed that the growth rate of P. lutea coral growth rate was range from 2.78 ± 0.25 to 9.90 ± 1.90 mm/year. The growth rate and sea surface temperature were positively correlated (18.28 %), the rainfall and sunlight duration were correlated negatively 37.82 % and 0.67 % respectively. The highest concentration of Cu and Pb were consecutively found at the stations Kawal, Malang Rapat, and Teluk Bakau, while the highest concentration of Zn were consecutively found in Teluk Bakau, Malang Rapat, and Kawal. Through annual band of coral, from surface to the core part of massive colony coral, we noticed The Cu, Zn and Pb increased variedly with value range of 2.087 ± 0.179 to 2.504 ± 0.117 mg/kg for Cu, 12.304 ± 4.815 to 32.944 ± 5.926 1mg/kg for Zn, and 1.761 ± 0.910 to 9.501 ± 0.483 926 mg/kg. The study may reveals an historical apportionment of anthropogenic heavy metals in the studied area.
Sea Grape Caulerpa Racemosa Carbon Stock Productivity with Enviteg Aquafarm Cultivation Technology
Authors: Raza’i Tengku Said , Amrifo Viktor , Putra Imam Pangestiansyah , Melani Winny Retna 
Published: March 2023

Abstract
Global climate change that occurs due to various activities carried out by humans in an effort to meet the needs of life such as conversion of residential land, industrial development, mono-culture plantations and forest burning. This condition will cause the depletion of plants as free carbon absorbers. The purpose of this study was to determine the value and productivity of the carbon stock of C.racemosa sea grapes as a cultivated commodity that could be superior. The results showed that C.racemosa had carbon reserves (ash content) of 2.98% of its body and was able to contribute carbon in nature of 32.18 kg/ha to 307.31 kg/ha based on location in Bintan and 97.78 kg/ha. ha up to 130.78 Kg/ha based on the wind season. This shows that C. racemosa besides being able to be used for meeting needs can also be developed as carbon stocks in the waters.
Oceanographic conditions and sedimentation in the Kawal river Bintan Island and impact on the prevalence of coral disease
Authors: Putra R D , Surinati D , Mulyono A , Narulita I , Djuwansah M R , Wirayuhanto H , Yulada M R , Saputra A C , Hukom F D , Sari T E Y 
Published: March 2023

Abstract
In river mouths and coastal areas, sediment carried by water flows often clogs the estuaries and causes silting lagoons, impacting the prevalence of coral disease. Ten sediment traps were installed in the river 25 cm from the bottom to record the data for 21 days in Kawal River. Oceanographic and current flow data were collected using CTD and a Current meter using the Eulerian method with a depth interval installation of 0.25 to 0.75 from the river surface. The Underwater Photo Transect (UPT) is a method to analyze the condition of coral reefs and coral disease. CTD the temperature data ranged from 30.471 ± 0.001 °C to 31,609. ±0.001°C, salinity value ranges from 29.643 ± 0.001 PSU to 32.336 ± 0.001 PSU and current flow ranged from 0.063 ± 0.010 m/s to 0.281 ± 0.012 m/s. The results of the sediment trap, the dry weight value of sediment deposited in the sediment traps ranges from 0.89 grams, and for the largest of 48.45 grams, the turbidity ranged from 0.77 NTU to 4.22 NTU. The prevalence of coral disease was 56.40%. The conclusion indicates that excessive sedimentation rates at river mouths can result in a high incidence of coral disease.
Analysis of marine garbage catches in mangrove roots of rhizophora sp in senggarang besar, tanjungpinang, Indonesia
Authors: Yuniar Sintana Tri , Virizki Anasha Nugrahaini , Sahilla Dilla , Jumari  , Fajri Muhammad , Praditya Mhd Habib , Febriansyah Pajri , Manalu Raquel , Kurniadi Zefri Khalik , Sanjaya Iqbal Maulana Yusuf , Nugraha Bramantio Adhityas , Hidayat Rommy , Kurniawan Dedi , Zamalludin  , Saputra David , Nugraha Harist Aditya , Veronisa  , Irawan Henky 
Published: March 2023

Abstract

Rhizophora sp has a single root. The shape of the roots, which are like anchors, is what makes mangroves wave absorbers, sediment binder, and so on. One of the functions of mangrove roots is to prevent the release of garbage into the open sea. This is due to the shape of the roots that make garbage snagged (caught) on the sidelines of the roots. The purpose of this study was to analyze the capture of marine debris in the mangrove roots of Rhizophora sp in the Sengarang Besar ecosystem. This research was conducted in December 2021 in the mangrove forest of Senggarang Besar. The method used is the line transect method with 10 Rhizophora sp mangrove trees located on the coast. Then, data analysis on the density of waste caught in the mangrove roots of Rhizophora sp. The results showed that the inorganic waste found in the mangrove roots of Rhizophora sp were plastic waste, metal waste, glass waste, rubber waste, and cloth waste. Plastic waste is the highest waste catch in the mangrove ecosystem of the Great Senggarang beach. Then the data that has been taken is analyzed using Pearson correlation to prove whether there is a relationship between the circumference and the type of garbage caught. The results of the Pearson correlation between cloth and plastic with root circumference were -0.30 and -0.04 (no correlation between the two variables); Pearson glass correlation with root circumference was 0.45 (sufficient correlation); Pearson rubber correlation with circumference is 0.71 (strong correlation). It can be concluded that there are other factors such as geographical influences, ocean currents, and others in the catch of garbage at mangrove roots.
The Planning Concept of Sustainable Marine Based Ecotourism in Kuala Sempang Village, Bintan, Indonesia
Authors: Gusrizal  , Muzwardi A. , Muhammad A.S. , Arfandi M. , Kusasi F. 
Published: March 2023

Abstract
Kuala Sempang is a coastal village in the Bintan Regency which has the largest mangrove ecosystem. This village’s advantageous location near the estuary of the Busung River gives it the opportunity to develop marine-based ecotourism. Unfortunately, this untapped potential has not yet been fully realized. Consequently, the purpose of this study is to propose a planning concept for the development of sustainable marine-based ecotourism in Kuala Sempang. This study employs both qualitative and quantitative methodologies, including interviews and observations, as well as visual analysis utilizing drone imagery and Google Earth. This study intends to generate a spatial and architectural design for potentially developable areas. In addition, a gross budget estimation plan (RAB Global) will also be produced, explaining the total amount will be spent on the development of each area. According to the findings, three seven locations have a good chance of becoming ecotourism destinations: Dapur Arang Sei Lepan, the coastal area of Busung Bridge, and the area surrounding Empat Islands. According to the RAB Global, a multi-years village fund would not be sufficient to cover the full expense of developing the area. Government assistance and private investment are also required for the development of these potential marine tourism destinations.
Mangrove Bio-Ecology for Rehabilitation Purposes in Pandeglang
Authors: Ati Restu Nur Afi , Kepel Terry L. , Kusumaningtyas Mariska A. , Sudirman Nasir , Salim Hadiwijaya L. , Solihuddin Tubagus , Heriati Aida , Mustikasari Eva 
Published: March 2023

Abstract
This study aims to determine the bio-ecological condition of mangroves that could be considered for the rehabilitation planning process by the government or any other entities. This study was conducted in Ciseukeut-Panimbang, Pandeglang. Eight mangrove species were found, which belongs to four families of Avicenniaceae, Myrsinaceae, Euphorbiaceae, and Rhizophoraceae. The density of mangrove species in the study site ranges from 113-744 ind/ha. The results of the diversity index value showed that mangrove vegetation was in the low category with a range of 0.04 – 0.16. This value indicates the presence of environmental pressures, so the mangrove ecosystem is considered unstable. The dominance index belongs to the low category with a range of 0.03 - 0.23. The uniformity index value is also low at 0.01-0.08. The value shows that the mangrove ecosystem in Ciseukeut Panimbang Village is experiencing pressure, or its condition has decreased. Efforts to rehabilitate mangroves in Panimbang regency can be done by planting from the dominant mangroves Avicennia sp and Rhizophora sp. These species play a very important role in Panimbang, its important value index was 90,66% and 56,77%. The timing of planting propagules in Pandeglang area should be carried out in the eastern season so that the propagule can grow optimally and safely inundate from tides that occur in the western season with a height of up to 1 m.
Climate change innovative action to overcome marine pollution in Kepulauan Riau
Authors: Akbar D , Prayuda R , Setiawan A , Wahyudi H , Yudiatmaja W E , Kartika F D , Putri A A 
Published: March 2023

Abstract
Global Blue New Deal aims to create climate stability and ocean climate nexus, also to elaborate COP26 works remains. The most important agenda is to tackle the disinclination of ocean health action. Even though the awareness of essential meaning of healthy ocean to sustainable blue economy and human well-being. The first pillar is to preserve ocean health due to its impact on the rise of sea level and welfare of local communities by reducing land-based marine pollution. Halt and curb use of plastic nurdles, plastic bags, and micro plastics through use of bans, taxes and other disincentives. The second pillar, conduct naturally friendly solution to promote sustainable environment and resilience for climate risk by supporting global movement to secure 30% of the ocean all over the world by 2030, also leveraging the existence of Marine Protected Areas (MPAs).
Effect of laser shock processing on residual stress evolution in martensitic stainless steel multi-pass butt-welded joints
Authors: Li Li , Guo Shudong , Guo Yanhui , Ren Jingzhong , Hou Wenbin , Wang Xigang , Jia Lu , Zhang Nannan , Gan Hongyan 
Published: March 2023

Abstract
Laser shock processing (LSP) is an innovative approach, which effectively improves the mechanical behavior of metallic structures by introducing compressive residual stress. To evaluate the residual stress evolution in low-carbon 13Cr4Ni martensitic stainless steel multi-pass butt-welded joints induced by LSP, a two-step numerical simulation including welding analysis, at first, followed by LSP calculation with the simulated welding stress results being taken into account, was performed based on ABAQUS software. Effects of LSP parameters such as power density, spot size, overlapping rate and numbers of laser shock on the residual stress variations, were systematically investigated. To validate the reliability and accuracy of the numerical simulation, experiments of welding and LSP were conducted in sequence. The residual stress after welding and LSP were investigated by x-ray diffraction method. Results demonstrate that the simulated results show a good agreement with the experimental datas. The welding residual stress distribution is uneven. Larger tensile stresses appear on the weld surface and its adjacent heat-affected zone, which could be converted into high-level compressive stress after LSP. Furthermore, an ideal residual stress field can be obtained after two successive laser shocks with an overlap rate of 75% when the power density, spot diameter, and pulse width are 7.6 GW cm−2, 4 mm, and 25 ns, respectively.
Multimodal analysis of generic cantilever-based piezoelectric nanogenerators with offset-proof mass
Authors: Pandey Chandan , Sharma Gaurav , Prakash Chandra , Dixit Ambesh , Pratiher Barun 
Published: March 2023

Abstract
The present work investigates analytically and experimentally the multimodal performance analysis of piezoelectric (PZT-5A) based generic nanogenerators. The present nanogenerators consider both uni-morph and bimorph with offset-proof mass subjected to sinusoidal base excitation. The finite element-based multi-mode electromechanical coupled dynamics governing equations are derived to formulate the analytical expressions of uni-morph, and bimorph nano-harvesters for frequency responses function of output voltage, current, and power, respectively. The impact of base excitation, load resistance, thickness, length, and mass of offset-proof mass on the output voltage and harvested energy is investigated by considering multi-mode vibration bodies. PZT-5A is evenly distributed over the substructure for the single voltage output. Interestingly, we noticed that a uni-morph cantilever with offset-proof mass is the best among all the investigated configurations, showing the maximum power at different load conditions. Analytical solutions are in good agreement with nearly no error for the first few vibration modes as compared to what was obtained using numerical simulation. The experimental realization for a single mode of vibration has been explored, and results showed that the fundamental mode swings very similar behaviors in voltage and power output, mostly in pre-and post-resonance conditions as compared to analytical results, and the difference between these two results is about nearly 5%. Thus, the present work depicts an effectual correlation between analytical development, numerical results using COMSOL 2D, and experimental realization for analyzing energy harvesting devices. These results may be helpful for the experimentalists to design efficient nanogenerators.
Numerical investigation on regulation and suppression of heat and mass transfer by varying thermal and solutal buoyancy force
Authors: Singh Ranjit J. , Kannan Y S , Nimmagadda Rajesh , Shukla B 
Published: March 2023

Abstract
In this study, a three-dimensional numerical analysis is presented for regulation and suppression of heat and mass transfer by varying thermal and solutal buoyancy force with a rotating cylinder placed at the center of the cavity. The energy and concentration equations are coupled by Dufour and Soret parameters to have a mutual effect of concentration and temperature on heat and mass transfer. The thermal buoyancy in the flow is adjusted by varying Rayleigh number of Ra = 104, 105, 106 and the mixed convection in the flow is regulated by varying Richardson number of Ri = 0.5, 1, 1.5 at unity buoyancy ratio (N = 1), Soret number, Lewis number and Dufour number. The present heat and mass transfer solver is developed and validated using the open-source computational fluid dynamics (CFD) package OpenFOAM 5.0. The two vertical opposite sides of the cavity are maintained as isothermal and isosolutal (iso-concentration), and the remaining four surfaces with rotating cylinder are kept as adiabatic. The present analysis reveals the impact of the mutual coupling of heat and mass transfer with the presence of thermal buoyancy, solutal buoyancy including mixed convection flow. The increase in the forced circulation at fixed thermal and solutal buoyancy force increases the heat and mass transfer. The variation of Nu

avg
and Sh

avg
is observed to be steady even with increasing Ra, then changes to periodic and chaotic with the implementation of a rotating cylinder. The detailed analysis on the variation of thermal buoyancy at unity buoyancy ratio, forced convection is reported by plotting streamlines, temperature and concentration contours, average Nusselt and Sherwood number.