bluuebunny/crossref_metadata_2025_split huggingface dataset:
Beach Profile Assessment and Erosion Rate Estimation of Monsoonal Coastline Area in Pahang, Malaysia
Authors: Adnan Nor Aizam , Rahim Haris Abdul , Mohd Fazly Amri , Maulud Khairul Nizam Abdul 
Published: August 2021

Abstract
Malaysia has a long coastline stretching over 4,809 km where more than 1,300 km of beaches are experiencing erosion. Coastal erosion is defined as the permanent loss of land and habitats along the coastline resulting in changes to the coast. Thus, it is important to detect and monitor coastline changes especially in Pahang, Malaysia. This study used temporal data and high spatial resolution imagery of SPOT 5. It also explored remote sensing and GIS techniques to monitor coastline changes along 10 identified locations, from Cherating to Pekan of the Pahang coast. Ten significant coastline locations namely Pantai Cherating, Pantai Air Balok, Sungai Ular, Pantai Batu Hitam, Pantai Beserah, Swiss Garden Kuantan, Taman Gelora, Pantai Sepat, Pantai Cherok Palok, and Pantai Tanjung Agas were identified to be vulnerable to coastline erosion. Two temporal remote sensed date of SPOT 5 for the year of 2006 and 2014 were used to quantify erosion or accretion rate using National Coastal Erosion Study (NCES) guidelines. The research found that eight area out of 196 or 39.7% locations were eroded and categorized into acceptable erosion category (K3), while 64 area or 32.7 % had significant erosion category (K2) where the coastline retreated more than one meter per year and the most critical eroded area was K1 at 54 or 27.6% sites. Cherating, Swiss Garden Resort, and Cherok Paloh were among the sites with the highest erosion rate between −5.692 and −6.919 m/yr. Meanwhile, the highest rate of accretion or sedimentation was indicated in Tanjung Agas at 7.391 m/yr. A qualitative relationship between the erosion rate and slope percentage for the entire Kuantan coast that stretch from Pantai Cherating to Tanjung Agas, Pekan indicated that the coastal slope percentage, the beach width, and the beach material that deposited on the sites were interrelated and had significant impacts on the erosion rate on several particular zones of the Kuantan coastlines. The findings from monitoring coastline changes and identifying vulnerable erosion areas might be useful in the policy and decision making for sustainable coastal management.
A laboratory study on wave transmission over hexagonal artificial reef
Authors: Armono Haryo Dwito , Winarto Aris , Sujantoko  , Ketut Suastika I 
Published: August 2021

Abstract
Artificial reefs are commonly used to rehabilitate natural coral reef damage. Artificial reef serves as a new habitat for marine life and simultaneously protect the shoreline by reducing wave energy without reducing the aesthetics of the protected beach. As an artificial reef can serve as submerged breakwaters, the level of their effectiveness in reducing incoming wave need to be investigated. The new form hexagonal shape artificial reef is proposed then evaluated based on the transmission coefficient. The tests for various configurations of a hexagonal reef in a 1:10 scale were conducted in the wave flume of Department Ocean Engineering, Institut Teknologi Sepuluh Nopember, Surabaya. The result of tests was presented and showed that the new proposed hexagonal shape artificial reefs have better performance compared to cylindrical and cubical shape artificial reefs.
Community Resilience and Empowerment Through Urban Farming Initiative as Emergency Response
Authors: Atmaja T , Kusyati N , Fukushi K 
Published: August 2021

Abstract
Currently, urban vulnerability has been exposed by catastrophic and unpredictable events which required cities to improve their resilience. Urban farming is promoted as one of the alternative strategies that could improve resilience through community empowerment aligned with re-naturing the environment. This study highlights the role of urban farming as community empowerment activities which could develop community resilience in the context of food and nutrition security specifically as emergency response. The study utilized an in-depth field survey to develop the database. The study found that urban farming could contribute to community resilience for feeding potential and nutrient sufficiency especially for targeted population who has highest risk during emergency such as the COVID-19 case. Urban farming in Malang could feed up to 50,000 inhabitants which cover only an age range of 60-64 years old. To provide sufficient vegetables for targeted population, there was a need for 1.91% (211 ha), 1.09% (120 ha), and 0.82% (91 ha) of area given each production scenarios such as normal, medium, and intensive management, respectively. The most important nutrient needs were Vitamin B1, B2, B12, D; Niacin eq.; and Folic acid due to only 10% sufficiency in the average. The study recommended specific additional vegetables to be cultivated such as red spinach and long beans since they have the highest nutrients content based on scoring.
Ionosphere Anomaly Analysis before Earthquake Using GPS (Case Study: Banten Earthquake August 2nd, 2019)
Authors: Liufeto D A , Cahyadi M N , Rahayu R W 
Published: August 2021

AbstractThis research is to analyze anomalies in the ionosphere that occur when an earthquake occurs. When an earthquake occurs, three types of waves are generated, namely: acoustic waves, gravity waves, and reyleigh waves. Acoustic waves generated perpendicularly from the earth’s crust during an earthquake propagate into the ionosphere, where they create electron density deviations. This phenomenon is detected as CIDs (Coseismic Ionosphere Disturbances), namely TEC (Total Electron Content) fluctuations that occur 15 minutes to 1 hour after an earthquake occurs. As a result of this deviation, the electromagnetic waves emitted by the GNSS (Global Navigation Satellite System) satellite will delay when passing through an ionosphere of approximately 300 km from the earth’s surface. The earthquake data used in this study came from earthquakes in Indonesia with the potential for a tsunami, namely the Banten earthquake on August 2, 2019 (7.4Mw from BMKG) with GNSS data from the closest CORS station to the epicenter, namely the CPTN, CPTU, and CUJG stations. The processing results show that there is a TEC anomaly recorded by GPS satellite no. 29 which appears 15-20 minutes after the earthquake. Anomalies ionosphere that occurs during an earthquake are expected to be useful as an early warning system before a tsunami happened.
Interaction between Marine Sectors using System Dynamics for Patimban Deep Sea Port as a Green Port: A Proposed Model
Authors: Suheri Tatang , Alexandri Mohammad Benny , Raharja Sam’un Jaja , Purnomo Margo , Viridi Sparisoma 
Published: August 2021

Abstract
Based on Marine Policy Statement (MPS) some sectors are chosen as the key elements, whose interactions are modeled using system dynamics (SD). They are port, commercial shipping, marine protected area, and commercial fishing. Besides those, according to MPS and beyond the coastal area conversion of agricultural land into the industrial area due to commercial shipping, maintenance of state roads due to port (shifting from Tanjung Priok port), redistribution of population, and environmental aspects will also be taken into account in the model. Some of the elements will construct reinforcing (R+) loops, while the others construct balancing (B-) loops in finding an equilibrium or solution. Several scenarios are proposed, where each has a different set of parameters, that can reflect a certain policy. Due to the lack of certain data and information related to the deep seaport, most of the data used in this work are based on assumptions but with a logical causal relationship between elements. It is observed that some features in the results are as expected, but some are new and depend on the chosen scenario. Further benchmarks with real situations are required for validation of the model.
Beach Topographic Change Analysis Using Multi-temporal UAV Data
Authors: Chang K T , Fang H M , Hsiao S S , Li C S 
Published: August 2021

Abstract
A time-serial topographic change was performed using two kinds of surveying methods, including direct measurement and indirect remote sensing technology for beach topography surveillance. Compared with reference topographic data, the root mean square error was 0.169 m. From May, 2018 to March, 2019, multi-temporal beach topographic change results indicated that the distance between baseline and shoreline varied in the range of −24.82∼9.58 meter, and weekly variates are −3.16∼0.45 m. The UAV technique can be efficiently used to detect topographic change information in the coastal area.
Semi-probabilistic Method in Analysing Kendeng Fault Earthquake Hazard in Surabaya, East Java
Authors: Widodo Amien , Syaiffudin Firman , Perdana Aliffiansyah , Adausy Thufeil Amr , Kristanto Aisya Nur Hafiyya 
Published: August 2021

Abstract
Surabaya is one of the cities in Indonesia which is prone to earthquakes. This condition is caused by the megathrust zone located in southern Java. In addition, there is an active fault that passes through East Java, namely the Kendeng fault, which to be the source of underground earthquakes. The part of Kendeng Fault that is situated near Surabaya is classified as the Surabaya segment and Waru segment. Based on this condition, research was carried out to analyze the earthquake hazard caused by Kendeng Fault in Surabaya city. A semi-probabilistic method is used in this research, as it can calculate the Peak Ground Acceleration (PGA) and earthquake intensity by considering the range from the measurement point to every point on the fault. The PGA measurement is using the equation of attenuation function. USGS Vs30 data, East Java Province base map, and Surabaya geological map are the data that were used to support the research. The result of earthquake hazard analysis gives the highest ground acceleration potential region is located in the north-western Surabaya subdistricts, this includes Sambikerep and Lakarsantri subdistricts. The high value of PGA and earthquake intensity is strongly affected by the short distance to the earthquake source.
Microplastic Distribution in Seawater and Sediment on Kampung Atas Air, Balikpapan
Authors: Prasaningtyas Asri , Wulandari Marita , Ghozali Achmad 
Published: August 2021

Abstract
Kampung Atas Air at Margasari Village, West Balikpapan Sub-District on Balikpapan City is a densely populated settlement where most of the houses are located on the tidal land of the sea. That location is an area that has a high potential for microplastic pollution due to existing settlement activities. Microplastic is plastic particles that smaller than 5 mm in size sourced from large or macro-sized industrial, household, and plastic weathering activities. Microplastic samples were taken from two media, water and sediment. Microplastic identification was carried out under a microscope with 10 times magnification. The result of this observation shown 4 types of microplastic, which are films, fragments, fibers, and granules. Fiber is the most common type found in this observation. It came from community activities such as fishing and washing clothes.
Optimum Installation Inclination of Solar Vacuum Tubular Collector in Lhasa
Authors: Hang Zou , Xin Liu , Enshen Long , Zhanqiang Liu 
Published: August 2021

Abstract
It is important to accurately design the installation inclination of solar collector for improving the utilization rate. This paper selected Lhasa area as a typical city which was rich in solar energy, setting a mathematical model for energy collection of vacuum tube collector to dynamically analyse the south towards, 0°∼90° angle of solar radiation on the surface of the collection on 8760 hours. As the results showed: the ability of the vacuum tube collector to collect solar reflection, scattering and direct radiation varied with the installation inclination a lot. When the inclination angle was 90, the maximum annual reflection radiation value was collected by the vacuum tube collector; when the inclination angle was 0, the maximum annual scattering radiation value was collected; when the inclination angle was local latitude, the maximum annual direct radiation value was collected; direct radiation in Lhasa was the main factor, so the maximum installation inclination of solar energy collected during the whole year and heating season was close to the local latitude.
Research and development of ship ballast water treatment system
Authors: Wen-xiang CHEN , Fa-xin ZHU , Xian-bin TENG , He-wu Yang , Kong-xing DING , Zhao-jian WANG 
Published: August 2021

Abstract
If the ballast water is discharged without treatment, it will cause serious ecological damage to the local port. This paper takes the ship ballast water treatment system as the research object. The existing ballast water treatment system is investigated. A ship ballast water treatment system with capacity of 150m3 /h, filtration accuracy of 40um and UV dose of 350mJ/cm2 is designed. This paper introduces the working principle of the main unit of ship ballast water treatment system, and designs an automatic monitoring system based on PLC and LabVIEW. The results show that the device has high practicability and feasibility.
Analysis on Finite Element Grid Size and Discrete Error for Super-high Arch Dams
Authors: Yan Yizhi , Zhang Wanju , Shen Zhimin , Li Zimeng , Wei Yunpeng , Wang Wenxiong 
Published: August 2021

Abstract
Compared with the world super-high arch dams with height more than 200 meters, the six super-high arch dams already built or under construction in China share the same special body shapes with higher ratios for both top/bottom width and thickness, and for top arch length with dam height. Also all of them are subjected to big top-level water pressures. In the paper, the computational formulation of thermal-coupled structure of hollow sphere similar to arch dam in shape and load-subjected is derived first and analysis of errors from the finite element method compared with the analytic solution is made. Then, a typical super-high arch dam is taken as the example of structure analysis including dam body mesh division, stress distribution, error estimation. Employing quadrilateral Coupled-field tetrahedral element with size decided by the bottom thickness multiple of arch crown beam, performance of mesh division and analysis for complex model is done conveniently and fast. Also, the paper investigates the error and convergence of results with different mesh density, discusses the special stress states of arch dam, and proposals acceptable dam body element size from calculation accuracy, convenient operation and elapsed time when performance is carried on with strong coupling on conmen personal computers. The research work indicates that errors of analysis results in most part of area are very small excepting those for the local singularity and concentration part when the dam body element size is decreased to 0.25 multiple of bottom thickness of arch crown beam, with dam body energy error norm less than 10% and consuming a couple of elapsed time. The conclusion should be common for the arch dams in China as they have similar shape.
State-of-the-art of Research Progress of Self-centering Structure System
Authors: Zhang Qian , Xiong Ergang , Guo Ruie 
Published: August 2021

Abstract
Traditional building structures dissipate seismic energy through the plastic deformation of members in the earthquake, which may lead to a large residual deformation after the earthquake. Those structures are very difficult to repair. Traditional building structure can become a new structure with self-centering ability by using a special energy dissipation component, adding prestressed tendons or supplementing dampers. Compared to the traditional building structure, this new self-centering structure can more effectively reduce the residual deformation caused by the earthquake, and it has a desirable capability to dissipate seismic energy so as to enable itself to be of more security. In this study, the domestic and foreign self-centering structures are classified and summarized. This study deals with research progress of self-centering structures including self-centering concrete shear wall structure, self-centering concrete frame structure, self-centering steel moment frame structure, self-centering braced steel frame structure, self-centering steel plate shear wall structure and self-centering offshore platform structure. Besides, this study introduces the related research progress of other research fellows.
Water saving situation in southern water rich areas in the new era and research on implementing national water saving action Taking Haining as an example
Authors: Chen Caiming , Sun Yi 
Published: August 2021

Abstract
Haining City is one of the top 100 counties in China’s county economy. In 2020, Haining City ranks 19th among the top 100 counties in China’s county economy, and is a strong economic County in Jiaxing City and even Zhejiang Province. The implementation of national water-saving action proposed in 2019 is not only the embodiment of the national will, but also the only way to solve the bottleneck of water resources and water security. It is of great significance to implement the national water saving action to improve the level of intensive utilization of water resources, to support the high-quality development of economy and society and to serve the construction of ecological civilization in Haining. At present, the water-saving work in Haining City is faced with a series of problems, such as the lack of water-saving awareness, the lack of water-saving work breadth and depth expansion. Based on the full analysis of the current water-saving situation in Haining City, the “1536” water-saving policy system and work system with Haining characteristics are put forward.
Influence of reclaimed water on water quality of urban rivers receiving WWTP effluent in Beijing
Authors: Zhao X , Zhang P , Wu W , Li K , Liu X , Lang H , Gan L 
Published: August 2021

Abstract
As a new type of water source, reclaimed water is used to replenish the landscape water bodies of urban river courses, which can alleviate the problem of insufficient water in river courses. However, due to the large amount of reclaimed water input, the water quality of the downstream river is obviously different from that of the upstream river. In this study, with the recharge of reclaimed water, the water conductivity increased gradually from upstream to downstream of the Wenyu River river, while the pH decreased gradually. In terms of nutrient concentration, TN, NO3-N and NO2-N of river water showed an obvious upward trend from upstream to downstream.
Research on Rainwater Runoff Pollution in Different Blocks in Xi’an
Authors: Jia Rubin , Li Jian , Wang Yong , Tang Di , Tian Lei , Sun Jingxin , Wang Min 
Published: August 2021

Abstract
By monitoring the changes of SS/COD/TP/TN in rainwater runoff in residential, industrial, commercial and traffic areas of Xi’an with the rainfall duration, the characteristics of rainwater runoff pollution in different areas of the city are explored. The results show that the concentration of pollutants in different regions from high to low is: traffic area>industrial area>residential area>commercial area. The concentration of pollutants in rainwater runoff in various regions reached a peak at the beginning of rainfall (within 30 minutes), and then gradually decreased and stabilized. The concentration of main pollutants in rainwater runoff in traffic areas is significantly higher than that in other areas. It can be seen that transportation may be the main factor affecting urban rainwater runoff pollution
Research on Water Environment Situation and Regulation Progress of Urban Lakes
Authors: pengfei Zhang , xiaoyu Cui , yunxia Gao , jing Mo , donghong Chen 
Published: August 2021

Abstract
Urban lake water environment management and water ecosystem restoration have always been research hotspots at home and abroad. However, there have always been different opinions on the water environment situation and water environment regulation of urban lakes at home and abroad. Based on the investigation of domestic and foreign water environment conditions, this study summarizes the research progress of different control measures of urban lakes and their respective advantages and disadvantages, and combines the research examples of domestic and foreign scholars to systematically analyze and organize the control of major urban lakes, with a view to provide a reference for the evaluation and restoration of urban lakes in the future.
Research on visibility detection model optimization based on dark channel prior and image entropy and visibility development trend prediction
Authors: Zhou Hao , Dai Mingyu , Shi Dapai , Meng Yuchi , Peng Boyang , Chen Tingxuan 
Published: August 2021

Abstract
In this paper, a visibility detection model based on the dark channel prior and image entropy is established to improve the lane line detection algorithm. Our algorithm does not need to preset the target, nor is it affected by the camera calibration parameters and position. It transforms the visibility calculation problem into the atmosphere transmittance calculation problem and refines the required results through the guided filter, achieving more accurate and stable visibility estimation results. In addition, based on the changing regularity of the visibility over time obtained by the detection model, a mathematical model is established to predict the change of heavy fog. We use ADF to test the visibility obtained in the visibility detection model and calculate the autocorrelation and partial autocorrelation functions. Finding the original sequence non-stationary, we perform the difference on the data, remove all insignificant factors and then incorporate the data into ARIMA model for fitting, finally getting the fitting and prediction results. The results are found similar to the actual situation, indicating that the results obtained by the visibility prediction model are robust and reliable.
Research on concrete temperature control measures in deep hole area of super high arch dam
Authors: Fu Yuchen , Tan Yaosheng , Liu Chunfeng , Pei Lei , Wang Yajun , Hu Yu , Song Liangfeng 
Published: August 2021

Abstract
The deep hole area is a key part of the dam during the construction period, and its temperature field and stress field changes are the focus of the current research on temperature control and crack prevention in the deep hole area. Based on the traditional three-stage and nine-stage temperature control standard, this paper uses three-dimensional finite element temperature stress simulation analysis to study the three major research ideas of shortening the medium-term cooling, shortening the second-stage cooling, and shortening the two at the same time. The concrete silo with a relatively lagging temperature control phase reaches the arching temperature at the same time. The simulation results show that the three temperature control measures can not only keep the stress in the area within a safe range, but also effectively shorten the construction period, providing new ideas for temperature control measures in the deep hole area of the arch dam.
Observational Study on the Impact of Large-Scale Photovoltaic Development on Soil Temperature
Authors: Wu Wei , Qin Yifan , Yue Shengjuan , Ren Lei 
Published: August 2021

Abstract
The two-year observation data of the three monitoring stations inside and outside Qinghai Gonghe Photovoltaic power plant from January 2019 to December 2020 was compared to analyze the characteristics of soil temperature changes inside and outside the photovoltaic power plant. The results showed that the photovoltaic power plant had the function of heat insulation and heat preservation, and had a greater impact on shallow soil. Specifically speaking, the photovoltaic power plant is the cold source in spring, summer and autumn, and the cooling effect on soil is the strongest in spring; the station offers insulation to the soil, and the impact of the station on soil temperature decreases as the distance from the center of the photovoltaic station increases.