bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Changes in Oceanographic Condition of Makassar Strait Related with El Nino Southern Oscillation (ENSO) Events of 2009 - 2019
Authors: Anugrah N. N. , Samad W. , Berlianty D. 
Published: December 2020

Abstract
The Makassar Strait is one of the main gates of the Indonesian Through Flow (ITF) which carries out water masses from the Pacific to the Indian Ocean through Makassar Strait, Indonesia. The Makassar Strait is thought to be one of the waters affected by the ENSO phenomenon. This study aims to determine changes in sea surface temperature, chlorophyll-a content, wind speed and direction and salinity content, as well as to see the upwelling potential in the Makassar Strait waters during the ENSO event from 2009-2019. The data used are sea surface temperature (SST), sea surface salinity, surface current velocity and direction, surface wind speed and direction as well as surface chlorophyll-a obtained from Climate Prediction Centre (NOAA). Based on Oceanic Nino Index (ONI) data, during 2009 - 2019 there were 3 times the ENSO phenomena occurred. The results of the study stated that in each of the ENSO phases fluctuations occurred at sea surface temperature, surface chlorophyll-a, surface salinity, as well as wind speed and direction and sea surface currents. During the ENSO phase, it is suspected that there is potentially area of upwelling in the Makassar Strait. This study highlights that ENSO event could be a reference for determining the location of sustainable fishing.
Coral Sr/Ca-based sea surface temperature variability at Seribu and Timor islands waters
Authors: Cahyarini S Y , Hendrizan M , Utami D A , Blume A 
Published: December 2020

Abstract
Climate phenomena which is happened in the Pacific and Indian oceans i.e. El Niño Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) influence Indonesian climate. To understand behaviour of climate phenomena and its impact to Indonesian climate it is required paleoclimate data which provide long time series climate data back to hundred till thousands year. Sea surface temperature (SST) is one of important climate parameter. Coral Sr/Ca is convinced as coral paleo-thermometer. In this study, the available coral Sr/Ca is used to reconstruct past SST variability (Coral SST). Univariate linear regression between coral Sr/Ca and SST is used to reconstruct past SST variability. To understand how the climate phenomena influence the SST variability, the coral Sr/Ca is correlated with the Nino 3.4 and IOD indices. The result shows that the influence of IOD and ENSO is difference between sites. At Seribu island coral SST shows that SST is influenced by IOD rather than ENSO, while from Timor coral SST shows that Indian Ocean Dipole (IOD) and ENSO influences SST.
A Lagrangian study of upwelled waters in the Northern Arafura Sea
Authors: Nurfitri S , Basit A , Putri M R , Pätsch J , Pohlmann T 
Published: December 2020

Abstract
The Arafura Sea is a relatively shallow water basin (less than 200 m) which is subjected to monsoonal winds and affected by the Banda Sea circulation. During the southeast monsoon (May to September) there is evidence of upwelling in this region which is indicated by the cooler SST (Sea Surface Temperature) and elevated chlorophyll concentration, especially at the coast of Papua (northern Arafura Sea). In order to address the origin of the upwelled waters masses, a numerical study using Lagrangian particles was utilized. The model was run backward in time to trace the trajectory of the particles arriving at the northern Arafura Sea, particularly in the upper 50 meters. Each particle was traced backward for three months with the arrival date August 31, 2014, as it is representative for an upwelling month. By this experiment we can identify the origin of the particles on June 1, including their depth, which arrive in the northern Arafura Sea. The daily velocity fields of the 3-D model HAMSOM (HAMburg Shelf Ocean Model) application to the Banda and Arafura Sea for 2014 were used to force the Lagrangian particle-tracking experiment. In general, 76.2% (62%) of particles arriving in 2.5 m (22.5 m) depth, originated from the upper 50 m of the Ceram and Banda Sea. In addition, particles originating from the depth interval 50-100 m contribute 19.6% (26.8%) to the number of particles arriving in 2.5 m (22.5 m) depth. On the other hand, for particles arriving in 47.5 meter depth 46% are originating from the upper 50 m of the southeastern Arafura Sea and 42% from a depth below 100 m of the eastern Banda Sea.
Analysis of tsunami hazard in the Southern Coast of West Java Province - Indonesia
Authors: Windupranata W , Hanifa N R , Nusantara C A D S , Aristawati G , Arifianto M R 
Published: December 2020

AbstractThe Southern Coast of West Java Province in the Java Islands is one of prone and exposed area to tsunami hazard. It has about 428 kilometers coastline length, covering 5 administrational regencies (i.e. Sukabumi, Cianjur, Garut, Tasikmalaya, and Pangandaran). It is a strategic area that support many economic activities including tourism, fisheries, electricity power plants, agricultures, markets as well as social factors such as coastal villages, schools and other public facilities. The existence of this strategic area is threatened by the potential for a tsunami disaster mainly from megathrust along the Southern Coast of Java Island. On 2006, a tsunami earthquake of M7.7 occurred off Pangandaran Regency with tsunami height of 5-8 meters and inundated about 500 meters along southern coast of West and Central Java Province. The tsunami caused more than 600 casualties and damage to buildings, public facilities and insfrastructure. Yet, the Indonesia National Earthquake Source and Hazard Map suggest a bigger threat of a plausible M8.7 – M9.2 megathrust earthquake off Java island. This research aims to analyze and map potential areas affected by the tsunami in the South Coast of West Java Province based on numerical modelling carried out with Cornell Multi-grid Coupled Tsunami Model (COMCOT) v1.7 based on the several megathrust earthquake scenarios in southern off West Java. The results of tsunami modelling show that the highest impact is generated in the Sunda Straits & West Java - Central Java Megathrust Scenarios with highest tsunami inundation and the fastest travel time occurred in Cianjur Regency with 26,7 meters height and estimated arrival time of tsunami wave approximately 10 minutes after the mainshock, while the farthest inundation distance is estimated in Sukabumi Regency about 5.8 kilometers from the coast due to existence of river.
A Comparative Analysis to Model Bathymetry using Multi-sensor Satellite Imageries
Authors: Hartanto Prayudha , Lumban-Gaol Yustisi , Dewi Ratna Sari 
Published: December 2020

Abstract
Accurate and high-resolution water depth information are important for wide range of coastal research and monitoring. In this case, providing an accurate bathymetric map is a major challenge for remote sensing. This study developed and evaluated a semi-parametric regression to extract depth information using various image datasets (Landsat 8, Sentinel 2A and Worldview 2). We compared the ability of these imageries to map depth information using generalized additive model (GAM). GAM is a semi-parametric generalized linear model which allow for nonlinear relationships between covariates and the target variable. We used the Morotai shallow water area in Indonesia to apply GAM in deriving depth information. We found that higher image spatial resolution results in higher mapping accuracies. This study highlights the potential of selected images and mapping techniques for deriving bathymetric data.
Assessment of tunicate distribution and Polycarpa sp. tunic color variation in the Ambon Island waters
Authors: Ruli Fismatman , Tapilatu Yosmina 
Published: December 2020

Abstract
Updated information regarding tunicates distribution and diversity in the waters around Ambon Island is scarce if any. We carried out an assessment using the underwater census approach in June 2018 to obtain the said information. Tunicates’ composition and distribution were described based on six sampling station observations. Their average density in five of six stations was less than one individual per meter square. Predominant genera observed were Didemnum and Polycarpa. Tunicates belonging to Polycarpa sp. had 12 color variations on its tunic. Those sampled in Hitu had the most variations (8 variants) compared to all the other four stations. Didemnum sp. was highly abundant in three stations (Morella, Hitu, and Larike). Those identified as Polycarpa sp. were predominant only in two stations (Mamala and Wakal). Further studies are needed to investigate the anthropogenic pressure effect on these tunicates, as they were known as biomarkers in ecotoxicological studies.
Research on Smart Energy System Technology Based on Cloud Computing Platform
Authors: Xiao Jing , Liu Wei , Zhao MingXin , Zhang Wei , Xu Ruobing 
Published: December 2020

Abstract
Based on the social and economic development, environmental protection needs, industrial policies and other smart energy systems have brought a new round of great changes compared with the traditional energy structure. Now the development of information technology provides a strong technical support for the transformation and upgrading of traditional energy to smart energy. This paper combines cloud computing, big data, artificial intelligence, blockchain and other emerging technologies to enable the traditional energy system, a smart energy system architecture based on cloud computing platform is proposed, which connects the bottom layer to the top layer of the energy system, and realizes the comprehensive integration of physical energy flow, information flow and value flow of smart energy.
Application Research on deep recovery and utilization technology of flue gas waste heat of coal water slurry boiler
Authors: Zhang Tong , Zhang Xianchen 
Published: December 2020

Abstract
Coal water slurry boiler has attracted great attention in the field of urban heat system because of its efficient and clean coal combustion. The coal water slurry contains 35% moisture, which makes the waste heat recovery potential of flue gas greater. After the combustion of coal water slurry, the 100°Cunsaturated flue gas becomes 50°C saturated wet flue gas after Wet Desulfurization Process. The Direct Contact Thermal Storage System and Heat Pump technology are used to realize the deep recovery of low-temperature flue gas. The technology has been successfully applied in the 6×70MW coal water slurry boiler of La Shan Heat Source Company. After 120 days of operation, 393000 GJ of flue gas waste heat is recovered, about 23000 tons of coal water slurry is replaced, and 84000 tons of flue gas condensate is recovered. It has good economic and social utility. It is an effective way to recover and utilize waste heat from flue gas of coal-fired boiler, and has a broad application prospect.
Research On Development Mechanism Of New Energy Vehicle Enterprises Based on Open Source Innovation Model
Authors: jie Zhang 
Published: December 2020

Abstract
This paper analyzes the feasibility of implementing open source innovation mechanism and the path of realizing open source innovation in new energy vehicle enterprises. Based on the main features of open source innovation and characteristics of electric vehicle products, combining the product type of electric vehicle and the process of product innovation, we applies the principle of technological innovation management to design the operation mechanism and conceptual model of different authorization protocols with the elements of innovation object, operation mechanism and innovation performance.
Research progress of two typical watershed-scale non-point source pollution distributed models
Authors: Qing Xia , Haojie Han , HuangHuiqiang  , Zhiliang Zhang , Caixia Zheng , Qin Zhao 
Published: December 2020

Abstract
In these years, with the increasingly serious human damage to the water environment, the world is seeing a more gloom prospect for water pollution control, and non-point-source pollution accounts for the major cause of water pollution. Currently, establishing non-point-source pollution load models to simulate the formation, transfer and load capacity of the non-point sources has become a major solution to control and treatment of non-point source pollution. The present study selected two classic basin-scale non-point source pollution distribution models — SWAT and HSPF, introduced their respective structures and application, and compared comparative analysis. The existing challenges and development trend of non-point source pollution models in China were also explored.
An improved droop control with network adaptive ability in islanded mode of microgrid
Authors: Li Shengwen , Wang Jinhao , Wang Hao , Zhang Ying , Lei Da , Wang Tan , Gao Le 
Published: December 2020

Abstract
When the microgrid operates in island mode, the droop control can be adopted to realize effective power distribution among distributed generations (DGs). Due to the different line impedancesof the various DGs, disproportional power distribution and circulating currents occur in conventional droop control, which make it difficult to maximize the efficiency of DGs and even may cause some DGs overloads. Therefore, an improved droop control strategy with an adjustable droop coefficient is proposed. The relationship between line impedance and reactive power is obtained by analysing conventional droop control. Then a new droop control algorithm is proposed. By introducing the output reactive power information of other DGs into the integral feedback link, the droop coefficient is modified to realize the accurate distribution of reactive power. The model is built on the Matlab/Simulink platform, and the effectiveness of the proposed control strategy is verified by comparing its reactive power distribution resultwith that of the conventional droop control.
Research on Optimization of Full Frequency Conversion Intelligent Speed Regulation Algorithm for Bulk Cargo Terminal
Authors: Lu Dongqi , Wang Xuelin , Shi Hankun 
Published: December 2020

Abstract
In view of the operating conditions of the bulk cargo terminal, a bulk cargo terminal frequency conversion speed regulation control scheme and an intelligent full frequency conversion speed regulation algorithm are put forward, thestudy completes the intelligent speed regulation function of the belt conveyor according to the source material flow. This research solves the problems of low equipment efficiency and high unit energy consumption caused by uneven distribution of material flow and long-term no-load operation of belt conveyors under various operating conditions. Research on the optimization of intelligent speed regulation algorithms provides strong technical support for the construction of green ports and the completion of energy-saving and emission-reduction targets for the water transportation industry.
Diagnosis and elimination of a typical serious rubbing fault of steam turbine
Authors: Ma Lyuzhou 
Published: December 2020

Abstract
During the operation of a steam turbine in a power plant, the no.3 bearing of the LP rotor suddenly vibrated strongly, which caused the protection action and the turbine tripped. During the maintenance it was found that serious rubbing occurred between the impeller of the LP rotor and diaphragm gland in the LP cylinder. Through inspection and analysis, the location and cause of the rubbing were found, and corresponding treatment was carried out. During the start-up process after maintenance, the vibration of no.1 bearing of HP/IP rotor increased to trip value. In order to eliminate the rubbing of HP/IP rotor, the appropriate warm-up speed was selected and the speed control method was adopted to make the unit start to the working speed and put into normal operation.
Research on Calculation Model of Horizontal Wellbore Shape with Non-uniform In-situ Stress
Authors: Zhenning Yu , Fahao Yu , Ting Wei , Dianju Wang , Yue Wang 
Published: December 2020

Abstract
In horizontal Wells, non-uniform ground stress is the root cause of irregular borehole shape. The failure of caliper instrument in horizontal section leads to the failure of accurate evaluation of borehole shape, which makes it difficult to calculate the frictional resistance of tubing string in the later stage. This paper studies the borehole shape calculation model from the following two aspects: (1) in the aspect of diameter expansion caused by shaft wall collapse. By establishing coulomb-Mohr criterion in cylindrical coordinate system, the well wall collapse instability is judged, and the hole diameter expansion is evaluated by establishing the calculation model of the instability range. (2) Shrinkage caused by stress concentration. Firstly, the boundary position of formation deformation is determined. Secondly, the calculation model of borehole deformation is established by analyzing the stress characteristics of formation, which reflects the time effect of borehole deformation. Therefore, the establishment of borehole shape calculation model of horizontal well provides a basis for calculating the friction between the pipe string and the horizontal section.
Research and improvement of current control strategy of active power filter
Authors: Wu Huajun , Wang Yupeng , Liu Bo , Chen Lidong , Pei Gen 
Published: December 2020

Abstract
With the continuous development of science and technology, there are many power quality problems which are different from those in the past. A large number of innovative electrical equipment will bring a lot of harmonics in the process of work, which will not only cause potential safety problems in the power system, but also cause serious harm and impact on the normal operation of all power dependent working equipment. In this paper, active power filter (APF) is studied for harmonic control of distribution network. A new APF current compound control method is proposed, which is based on Deadbeat and repeat plus LADRC in series. It improves the accuracy of harmonic compensation, enhances the anti-interference ability and dynamic performance, and achieves the purpose of precise control of current loop.
Dynamic Characteristics of Saturated Soft Clay under Constant Confining Pressure Cyclic Loading
Authors: Lu Yuan , Liu Fusheng , Bian Youyan , Zhong Yu , Chen Bin , Huang Juehao , Chen Jian 
Published: December 2020

Abstract
The research on the dynamic characteristics of soft clay under cyclic loading has high value. This paper takes Ningbo saturated soft clay as the research object and uses the GCTS true triaxial test system to analyze the effects of consolidated confining pressure and cyclic deviator stress on the axial cumulative strain. The experimental results found that when the number of vibrations and the cyclic stress ratio are the same, the axial cumulative plastic strain increases with the increase of the consolidation confining pressure. When the dynamic stress amplitude is the same, the axial cumulative strain decreases with the increase of the consolidation confining pressure. Under different confining pressures, as the number of vibrations increases, the cumulative axial strain increases. The development law of axial cumulative strain under different cyclic stress ratios is inconsistent, and there is a critical cyclic stress ratio. The experimental results provide a certain reference for engineering seismic design.
Integration of opencv raspberry pi 3b+ and camera sensor in access control of vehicle ignition key system
Authors: Medriavin Silalahi Lukman , Uli Vistalina Simanjuntak Imelda , Artadima Silaban Freddy , Budiyanto Setiyo , Heryanto  , Ikhsan Muhammad 
Published: December 2020

Abstract

The use of sensors for safety and comfort in vehicles has increased, as in several studies that are being discussed, including the use of pressure sensors for applications in the TPMS system or face recognition system security. The purpose of this research is to reduce vehicle theft that is happening right now. This system consists of a face recognition system. This reason is based on the ineffectiveness of the vehicle handlebar / steering lock. But in this study, a vehicle safety prototype was designed with a face recognition method in the hope that this prototype was designed to provide a sense of comfort, security and also the vehicle becomes a privacy vehicle. The method used is the Local Binary Path Histogram method to detect image objects and a small camera to capture images of the face, using the Raspberry Pi as a tool control center (in which the process occurs: Scanning, Extracting, Comparing, Matching, and all have been incorporated in OpenCV). The output of this study is the face that has been recorded in the database as access to open access to vehicle security. The conclusion of this research is the process of facial recognition in real time activating the vehicle ignition lock system.
Passive cooling using perforated aluminum plate to improve efficiency on monocrystalline of 100 Wp photovoltaic
Authors: Sofijan A , Nawawi Z , Suprapto B Y , Bizzy I , Sipahutar R 
Published: December 2020

AbstractMany researchers had applied various cooling techniques to reduce the operating temperature of PV cells so it will not exceed the temperature limit. If the operating temperature is exceeded, it can worsen the performance of the PV panel system. Passive cooling is one of the cooling techniques to reduce the operating temperature and increase the efficiency of the PV panel. Cooling operation without the addition of electrical energy is a new original idea, namely passive cooling which uses perforated aluminum plates mounted behind the PV panels. Research that has been carried out using perforated aluminum plates, hole diameter of 5 mm, hole spacing of 200 mm, and total holes of 1551 can increase efficiency by up to 57.64 percent on 100 WP monocrystalline PV panels.
Low cost prototype simulation of spectrum analyzer base on GNU radio and RTL-SDR
Authors: Harianto B.B. , Irfansyah Ade , Suprapto Yuyun 
Published: December 2020

Abstract
this paper describes the prototype spectrum analyzer simulation using Software Defined Radio technology. The use of this technology continues to grow very rapidly, this is what drives researchers to develop this system. SDR is a radio communication system where the modulation system contained in the hardware is replaced by implementing software on a computer or embedded system. The SDR system commonly used is GNU Radio. The use of SDR is very cheap (around $ 20), and is small in size so that it offers cost effectiveness and portability requirements added by GNU radio software that is open source. In this experiment, there were several parameters measured including power and signal to noise ratio (SNR) measured using GNU Radio and compared with measurements using the Spectrum Analyzer GSP-730 which was applied to prototype simulations using 60 MHz to 80 MHz frequency inputs from generator frequency. From the experimental results show the average GNU radio power is -15.28 dBm and the average spectrum analyzer power is -15.2 dBm, so the accuracy level of the power measurement on GNU Radio reaches 99.47%, while the average SNR spectrum analyzer is 54, 2 and GNU radio SNR 54.32 so the accuracy of SNR measurement in GNU Radio reaches 99.78%.