bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Abundance and Origin Possibility of Planktonic Foraminifera in Sulawesi Sea
Authors: Junita D R , Gustiantini L , Sartimbul A , Bernawis L I , Piranti S A 
Published: December 2021

AbstractForaminifera is very diverse and adaptive, both in its morphology and biology. It is a potential bioindicator to understand the ecological and physical conditions of the ancient and modern waters based on their distribution. It has been well confirmed that the abundance of foraminifera (as a fossil) in sediment can reflect the ocean conditions above (mixed layer to upper ocean) where it was deposited. Planktonic foraminifera however can be considered as passive particles, their movement is carried by ocean currents. In consequence, the foraminifera abundance may represent more wider ocean condition according to the ocean current pattern. This study aims to examine the role of ocean currents in the distribution of foraminifera in the Sulawesi Sea. Ten gravity core sediment samples from 73-3009 m water depth were retrieved by RV Geomarin III from the Marine Geological Institute, Indonesia. We conducted quantitative analysis, including calculation of abundance and cluster analysis. Two decades (1992-2012) of ocean current simulated data from the Hybrid Coordinate Ocean Model (HYCOM) is used in this analysis, extending from 115°E-140°E and 8°N-2°S. The result indicates that planktonic foraminifera is abundant in the Sulawesi Sea by 86.3%. There were several predominant planktonic species such asGlobigerinoides ruber(22.6%),Globigerina bulloides(15.3%), andNeoglobuquadrina dutertrei(10.1%). The ocean current above the sample location is constantly moving eastward as a part of the NECC. The average currents velocity shows that foraminifera in sample site S-03 with depth 2064 m may originated from up to 1035 kilometers away from its recent location.
Developing the Debris Incinerator Vessel as a New Solution for Managing Marine Debris in Small Islands of Indonesia
Authors: Chandra H , Rahmania R , Kusumaningrum P D , Sianturi D S A , Firdaus Y , Sufyan A , Hatori C A , Akhwady R , Indriasari V Y , Triwibowo H , Marzuki M I 
Published: December 2021

AbstractMarine debris has been considered a global environmental issue, yet its impacts on each country are varied. Indonesia as an archipelagic country comprises thousands of islands and vast marine territory. The marine debris has threatened many sectors, such as marine endangered species protection, coastal ecosystem, and human livelihood (e.g., sea transportation, tourism, fisheries). The government of Indonesia has implemented various efforts to address this marine debris issue, which include applying recent methods and prototypes from global partners. Based on these approaches, we learn that there are three key success factors to clean marine debris in a very large area of Indonesia, i.e.: good understanding of marine debris dispersion in Indonesian water, sufficient budget, and good coordination among stakeholders. Hence, the Marine Research Centre developed a prototype vessel design in 2021 to manage marine debris, particularly surround small islands, which in Indonesia is called“Kapal Insinerator Sampah”or Debris Incinerator Vessel (DIV). This vessel will focus on managing the waste generated by local inhabitants and marine debris stranded on small islands.
Study of the Historic Shipwreck Sites Area Development for Marine Ecotourism in Thousand Islands
Authors: Dillenia I , Troa R A , Triarso E , Johan O , Widati N A R S , Kusuma LPA Savitri CH , Rustam A , Pranowo W S , Heriati A , Adhityatama S 
Published: December 2021

Abstract
The historic shipwreck sites are a part of the Maritime Archaeological Resources. They are currently occupying an important position as one of the non-conventional marine resources with blue economy potential in it. Sites are usually found in the conditions that have been integrated with the marine ecosystem in their environment. Some have even been completely covered with coral reefs, so that this uniqueness becomes the added value of the site for a tourist attraction. The research was carried out in Thousand Islands waters, which having kept many records of the maritime history of the Nusantara Archipelago for centuries and in their current development, the Jakarta∧s Thousand Islands are included as one of the Marine Tourism Village areas (Desa Wisata Bahari/Dewi Bahari). The purpose of this research is to determine the value of the shipwreck sites potency which are suitable for marine ecotourism development area in Thousand Islands waters and for obtaining the sustainable management model that can be integrated with the ecosystem in their environment. The research methods used sites surveys, focus group discussions, and interviews. Data processing was done by using Site Significance Assessment analysis. The result shows there are 4 (four) of historic shipwreck sites potency area in Thousand Islands waters which can be recommended as the attraction for marine ecotourism with the model of the Marine Eco Archaeological Park (MEA Park). These sites areas include 1)Shinta wreck in Pari Island waters, 2) Tabularasa wreck in Pramuka Island waters, 3) Poso wreck in Karang Congkak waters, and 4) Papatheo wreck in Sepa Island waters.
Potential Source Analysis of Macrodebris in Untung Java Island by Using Trajectory Particle Modelling
Authors: Maharani A , Rachmayani R 
Published: December 2021

Abstract
Untung Java is one of the small islands in Thousand islands. One of the most highlighted problems on this island is the accumulation of macrodebris that occurs in the coastal and mangrove ecosystems. The purpose of this study is to determine the most potential source point for distributing debris to Untung Java Island by using a hydrodynamic model and particle trajectory model of MIKE 21. The scenario of the simulation is using pre-reclamation condition in 1999 and 2019. The estuary in Jakarta Bay is illustrated as the starting point for debris transport. Five other estuaries as potential source assumption are selected, namely Cisadane, Citarum, Muara Angke, Ciliwung and Cikeas. The validation data model used tidal data from Intergovernmental Oceanographic Commission (IOC) Sea Level Monitoring by utilizing Root Mean Square Error (RMSE) method. The RMSE is calculated up to 0.49-12.78%. The tidal current of Jakarta Bay is simulated up to 0.015-0.375 m/s. The Cisadane estuary is the most potential source as a supplier of macrodebris to Untung Java Island due to its debris movement pattern and the nearest distance to the island.
Evaluation of a New Integrated Marine Instruments: RHEA (Drifter GPS Oceanography Coverage Area)
Authors: Zenyda Kemaal S , Subiyanto  , Faizal Ibnu , Prayogo Nico , Purba Noir P 
Published: December 2021

Abstract
Marine instrumentation is used to make optimal use of natural resources in the marine sector in the form of storing oceanographic characteristics data. This research aims to evaluate a new Lagrangian instrument called RHEA, developed by the Marine Research Laboratory, Padjadjaran University. This research was conducted by examining the correction factors contained in the RHEA from the mechanical and electronic side to optimize the work and carry out appropriate validation of the oceanographic parameter data. The method used is by studying marine instrument literature and conducting a series of tests on the tool until it is ready for use at sea. The output of this research is in the form of literature on how the device works to be effective and efficient in collecting data about certain oceanographic factors. The result shows that RHEA has various functions: measuring pH, dissolved oxygen, temperature, turbidity, and salinity in real-time time. This instrument needs to be slightly modified again related to its design so that it can be more optimal when measuring oceanographic parameter data. In addition, in terms of data acquisition, it is necessary to improve the electronic components by replacing or adding several parts so that the data obtained can have high accuracy.
Fishing boat detection using Sentinel-1 validated with VIIRS Data
Authors: Marzuki Marza Ihsan , Rahmania Rinny , Kusumaningrum Penny Dyah , Akhwady Rudhy , Sianturi Daud Saputra Amare , Firdaus Yustisia , Sufyan Agus , Hatori Cecep Ahmad , Chandra Handy 
Published: December 2021

Abstract
Detecting fishing boat activity is still a challenge for the biggest archipelago countries, such as Indonesia, to monitor the huge marine area. Space technology using sensors SAR to detect ships has been developed since 1985. However, the cost of using SAR images is one of the barriers to operational aspects, mainly for detecting fishing boats to deter IUU fishing activities. This research aims to evaluate the use of Sentinel 1-SAR imagery for identifying fishing boats from space. We used VIIRS data for validating the purposes. Both data sources could be accessed freely. The object detection process can be derived into three steps: pre-processing, object detection and object validation. We used the constant false alarm rate (CFAR) method to discriminate against objects at sea. To identify fishing vessels, we used the size of the vessels and the intensity of light captured by VIIRS. According to the findings, 21 boats were discovered using sentinel 1-SAR imagery and four boats using VIIRS data based on the the area of interest.
PUMMA (Perangkat Ukur Murah untuk Muka Air) performance for water level monitoring of mangrove ecosystem in Pangandaran
Authors: Prasetiawan N R , Novianto D , Setiawan A , Husrin S , Bramawanto R , Ma’muri  , Widyanto S W , Kuncoro A , Wisnugroho S , Prabawa F Y , Mulyati N T 
Published: December 2021

Abstract
PUMMA is a real-time tide gauge that has been operating in several locations in Indonesia. One of them was installed in a mangrove area of Pangandaran that supports both the fisheries and tourism sectors. Tidal dynamics is one of the factors that can affect fish abundance in the mangrove ecosystem. PUMMA Pangandaran monitors the water levels of the mangrove ecosystem in real-time 24/7 and produces CCTV images. This paper aims to analyze the performance of the PUMMA in Pangandaran based on data from water level measurements and image quality from CCTV. The results show that the tidal range in the waters of the mangrove ecosystem in Pangandaran is 1.3 m, with the maximum and minimum high tides being 0.79 m and -0.53 m. The tidal type in the mangrove ecosystem in Pangandaran is semidiurnal and affected by geometry of the estuary. The water level in the mangrove area was influenced by sediments that form a sandbar at the mouth of the Ciputrapinggan River, which controls the fluxes of seawater. There is a data gap of 368 hours during the operation period of PUMMA, and mostly due to technical problems that often occurred at the beginning of the installation. However, after March and April, its performance was improved with only three hours data gap. For the quality of CCTV images, good quality contributed to about 76.67% and only 5.06% on bad quality. Overall, PUMMA’s performance showed excellent reliability in monitoring the water levels and the conditions of the mangrove ecosystem.
Forest cover trend analysis using MODIS time series and its climatic responses in the Mari El Republic of Russia
Authors: Kurbanov E A , Vorobev O N , Lezhnin S A , Dergunov D M , Wang Y 
Published: December 2021

Abstract
This study assesses whether MODIS NDVI satellite data time series can be used to detect changes in forest phenology over the different forest types of the Mari El Republic of Russia. Due to the severe climatic conditions, coniferous and deciduous forests of this region are especially vulnerable to climate change, which can lead to stresses from droughts and increase the frequency of wild fires in the long term. Time series analysis was applied to 16-day composite MODIS (MOD13Q1) (250 m) satellite data records (2000-2020) for the investigated territory, based on understanding that the NDVI trend vectors would enable detection of phenological changes in forest cover. There was also the determination of land cover/land use change for the area and examination of meteorological data for the investigated period. For the study, we utilized four phenological metrics: start of season (SOS), end of season (EOS), length of season (LOS), and Maximum vegetation index (MVI). The NDVI MODIS data series were smoothed in the TimeSAT software using the Savitsky-Golay filter. The results of the study show that over the 20-years period variations in phenological metrics do not have a significant impact on the productivity and growth of forest ecosystems in the Mari El Republic.
Monitoring and assessment of forest cover disturbance in the Middle Volga region of Russia using Landsat images
Authors: Vorobev O N , Kurbanov E A , Lezhnin S A , Dergunov D M , Tarasova L V 
Published: December 2021

Abstract
The knowledge of the disturbance effect on the forest ecosystems is crucial for sustainable development on the global level. It is important to quantify, map and monitor forest cover resulting from natural and anthropogenic disturbances. This research presents spatio-temporal trend analyses of forest cover disturbance in the Middle Volga region of Russia, using a time series of Landsat images. We generated a series of image composites at different year intervals between 1985 and 2018 and utilized a hybrid strategy consisting of Tasseled Cap transformation, sampling ground truth data and post-classification analyses. For validation of the disturbance maps, we used a point-based accuracy assessment, using local forest inventory reports and ground truth sample plots data for 2016-2018. The produced Landsat 1985, 2001 и 2018 thematic maps for 7 classes of forest cover show that coniferous area decreased by 4%. At the same time, there is a decrease in small-leaved (19%), mixed (8%) and an increase in young stands (23%). A significant disturbed forest area 85,120 ha was observed between 2014-2018, where much of the loss occurs due to severe wildfires. More research is needed with the inclusion of the additional number of anthropogenic and natural factors to increase the accuracy of monitoring and detection of forest disturbance of the region.
Assessing effects of drought on tree mortality and productivity in European forests across two decades: a conceptual framework and preliminary results
Authors: George Jan-Peter , Neumann Mathias , Vogt Jürgen , Cammalleri Carmelo , Lang Mait 
Published: December 2021

AbstractForests are currently experiencing an unprecedented period of progressively drier growing conditions around the globe, which is threatening many forest ecosystem functions. Trees as long-living organisms are able to withstand drought periods. Our understanding on critical drought severity resulting in substantial decline in net primary productivity and/or eventually tree mortality is underdeveloped. A wide range of remote sensing products and ground observations, including information on productivity, tree vitality, climate, and soil moisture with high temporal and spatial resolution are now available. Linking these data sources could improve our understanding of the complex relationship between forest growth and drought. We introduce here a conceptual framework using satellite remotely sensed net primary productivity (MOD17A3 and MODIS EURO), ground observations of tree mortality (ICP level I survey data), soil moisture anomaly (Copernicus European Drought Observatory), and spatially-downscaled daily climate data for entire Europe. This unique analysis will enable us to test the influence of biotic and abiotic covariates such as tree age, stand history, and drought legacy using historic droughts for model development. This conceptual framework, as evident from the preliminary results shown here, can help anticipating the effects of future droughts and optimize global climate models considering drought effects.
Intensification of nitrification processes in soil by ultraviolet (UV) irradiation
Authors: Anarbaev A , Tursunov O , Kodirov D , Izzatillaev J , Rakhmatov A , Shipilova K , Obidjanov D 
Published: December 2021

Abstract
This study highlights the application of UV radiation for soil treatment with regard to agricultural plant growth intensification. The influence of the parameters of ultraviolet radiation (intensity and wavelength) on the value of the redox potential in the soil was quantified. The experimental tests carried out in soils, plants, seeds with ultraviolet radiation lamps for changing the accumulation of the most mobile nitrate forms of nitrogen were defined.
Dynamic analysis of a ten-link tooth-lever differential transmission
Authors: Abdukarimov A , Saidakulov I 
Published: December 2021

Abstract
This article discusses the dynamics of a ten-link tooth-lever differential transmission mechanism. The force analysis of the transmission mechanism is given in order to find the dependence for determining the reaction in kinematic pairs and the balancing moment of the pair of forces and to show some features of the tooth-lever transmission mechanism. The force calculation was carried out taking into account the accelerated movement of links since their acceleration in modern high-speed machines is very significant. To obtain a more accurate concept of the external forces and moments loading the transmission mechanism in the accelerated movement of the links, the dynamics of the transient process of roller technological machines was considered. Cases of feeding the processed material were considered both from the side of the intermediate gears and from the side opposite to the parasitic gears. Dependencies were obtained to determine the force characteristics of this mechanism. Cases of pressure unloading and overloading on the processed material from the side of the free shaft, depending on the location of the transmission mechanism are shown. The dependence of the reaction force of intermediate gears on their own axes of rotation on the angle between the levers is shown. With an increase in the angle between the levers, the reaction of the intermediate gears on the axis of rotation increases.
Results of a pilot experiment on monitoring the condition of buildings and structures using unmanned aerial vehicles
Authors: Yu Narkevich M , Logunova O S , Kalandarov P I , Kalitaev A N , Tokmazov G V , Yu Romanov P , Alimov O 
Published: December 2021

Abstract
The purpose of the experimental study presented in the paper is to generate new knowledge about the possibility of using unmanned aerial vehicles to survey buildings and structures for subsequent extraction of information about their condition in hard-to-reach or remote places. As objects for the pilot experiment, the following were selected: a residential building in an urban environment that has been destroyed during operation; an object of unfinished construction; a roadway on the carriageway. An unmanned aerial vehicle of the model: DJI Mavic Air was used to survey the objects. The results of the study of objects are recorded in the form of photo and video streams for each object. Comparison of the results of the inspection of objects by experts and unmanned aerial vehicles showed the possibility and necessity of using new means to collect information about the condition of buildings and structures. The primary processing of the obtained images revealed their features: the effect of illumination on the color characteristics of the object of study; the presence of a textural component that complicates the process of separating the defect from the background; the presence of objects in the image that are not related to the elements of surface destruction; the change in the initial size of the object over time. The detected features of the images allow the use of standard algorithms and processing and require the synthesis of unique trajectories of their application.
Theoretical study of the impact aimed at improving the efficiency of fiber cleaning
Authors: Egamberdiev F , Jumaniyazov K , Abbazov I , Yodgorova H , Rajapova M 
Published: December 2021

Abstract
Since cotton cleaning in Uzbekistan is carried out mainly manually, this paper discusses the methods and technologies established in the process of cleaning cotton and fiber. The process of fiber cleaning is one of the important processes that complete the technological process of cotton processing, given that the quality of fiber largely depends on the efficiency of this process, the research work on the mechanization of the type of collection and improving the efficiency of its cleaning is analyzed. In order to improve the efficiency of cleaning cotton collected on the machine, information is provided on the need to improve the equipment for cleaning fiber used in cotton gins. The research results are based on the need to replace a special structural device that guides the fiber to the correct tooth of the first sawtooth cylinder located on two drum cleaning plants. New fiber-cleaning equipment was installed in the Jizzakh regional JSC “Zarbdor cotton cleaning» and experimental tests were conducted in production conditions. In addition, the process of changing the pressure, density and speeds in the furnace and the effect of their cleaning efficiency has been modeled and theoretically analyzed, when the efficiency of cleaning the cotton fiber flow using a column system allows changing the raw material from 4 mm to 15 mm based on the device. By results of the conducted analysis it was shown that the increase of efficiency of purification depends on the device attached to the saw teeth, factor of the taxation of the distribution coefficient B and p
0 efficiency factor of increasing the initial pressure and coefficient of efficiency savings from the analysis of graphs, which present graphs of the distribution depending on the type of saw teeth. Based on the results of the research, recommendations are given for the widespread introduction of fiber cleaning equipment installed at enterprises of primary cotton processing, with the installation of a special structural guide device.
Study on the process of droplet formation when liquid flows out of a capillary
Authors: Lee A , Utepov B , Kan E , Kuychiev O 
Published: December 2021

Abstract
This article presents the theoretical background for the justification of the parameters of the rotating sprayer. Theoretical studies show that an increase in the rotation frequency of the disk at a constant air flow velocity leads to a minimum median mass diameter of the droplets. Therefore, when justifying the diameter of the sprayed droplets, it is necessary to consider the combination of the disk rotation speed and the axial velocity of the air flow. To obtain high-quality air-droplet flow, the initial speed of the main droplets discharged from the periphery of the spray disc should be less than the air velocity and rotational frequency Pavlovskyi spray is recommended to be applied with in ω=60… 200 c1.
Improving breeding and productivity qualifications of Holstein cow breeds (b. Taurus) in climate of Uzbekistan
Authors: Shokirov K J , Dosmukhamedova M KH , Shokirov A J , Khodjaev U T , Soatov U R 
Published: December 2021

Abstract
This article accelerates the development of selection methods for selecting the best genotypes that are acceptable from the similarity genotypes of imported Holstein cattle typical of Chinese, German and Slovenian selection. The genetic potential of reproduction and productivity of breeding breeds in genotype-environment interactions has been demonstrated. The results of the same feeding, storage and performance of Holstein cows in summer and winter, the productivity characteristics of the cattle are presented.