bluuebunny/crossref_metadata_2025_split huggingface dataset:
Detection of Arosbaya Coastline Changes Using Sentinel-2A (Study Year of 2015-2018)
Authors: Taufik M , Nugraini L D , Pratomo D G , Kurniawan A , Utama W 
Published: October 2019

Abstract
Coastal changes are influenced by several natural conditions like beach balance and estuary. The most obvious fact from this condition which can be seen by 10 meter resolution of Sentinel-2A imagery is the erosion and accretion at the coastal area. This study found that the average of Arosbaya coastline changes from 2015 until 2018 suffer from erosion up to -1.099 meters. The coastline changes in Lajing village is uniform from south to the north. Almost all coastline shave eroded, with the average of -16.365 meter erosion and -83.105 meter maximum erosion value. However, Tengket village which is located in the north of Lajing shows different result. A high number of accretions is identified in this village with accretion rate up to 15 meters and the maximum accretion rate up to 275.0432 meters. The condition of Tengket village shows that the new land is unstable. It is not only because of natural ocean parameters from south still influenced by the Madura straits exit but also the sediment build-up from Tambangan estuary in the north of Tengket village. The effect of this condition takes form of area changes both of coastal villages from 2015 until 2018 period. There was 701.565 ha of area loss in Lajing Village; however, 902.6912 ha of new area was constructed in Tengket village making Arosbaya became 167.034 ha larger in 2018 than in 2015.
Risk Management of Flood Disaster (A Case Study of Kendal River)
Authors: Kuswanto P H , Wibowo M A , Hermawan F 
Published: October 2019

Abstract
Kendal River, which runs through the city of Kendal, often overflows causing flood for the immediate areas. This study uses the concept of risk management aimed at relevant stakeholders. Data analysis of this study applied the Risk Breakdown Structure (RBS) method to describe each classification of risk sources to risk sub-classification. The results depicted that there were 20 (twenty) risks of causing flooding in Kendal City, with 5 (five) risks being the main cause. According to the Central Java Provincial Government, there was a 35% risk at the extreme level, 60% at the high level, and 5% at the middle level. On the scale of risk acceptance, there were 35% classified as unacceptable, and 65% classified as unexpected. According to the Kendal District Government, there was a 60% risk at extreme levels and 40% at high levels. On the risk acceptance scale, there were 60% classified as unacceptable and 40% classified as unexpected. The results of this study expected to provide a guideline for stakeholders in risk response according to their role both at the Provincial Government and District Government levels based on priority scales.
Environmental Scanning: In Creating Strategic Planning for the Education of Persons With Different Ability
Authors: Mustika R D , Rahmayanti K P 
Published: October 2019

Abstract
This study aims to do environmental scanning in order to identify factors that influence the education policy for difable group. The current condition indicates that Indonesia’s Human Development Index (HDI) towards 2017 is ranked in 116th with a final score of 0.694 which is still relatively low. As an effort to improve HDI, Indonesia conducts human development through education as basic rights of every human being and as one of the public service products that must be obtained by the community including all Indonesian people, particularly people with different abilities and children with special needs (ABK). According to the Ministry of Education and Culture (2018) out of as many as 1.5 million people with different ability, only 300,000 crews who have become students in 2017. Thus, this condition is disadvantageous for 1.2 million ABK who cannot get proper education in Indonesia. The research utilizes the qualitative approach and data collection techniques through secondary data analysis. This study found out that there are several factors which impact the ability of all levels of government to build strategic planning in the education sector for difable group such as limitations and unequal commitments from local and national governments, limitations in implementing regulations, unequal opportunity to obtain sufficient livelihoods that affect the income they earned, exacerbated by unequal perspective regarding the need for quality education for people with different abilities, by which the people with different abilities has not been prioritized for education. In addition, the use of assistive technology in the field of education for persons with different abilities is very minimal in Indonesia, as well as geographical factors as the main determinant factors that influence the issue of education for persons with different abilities.
The Impact of Spatial Patterns of Bunaken Subdistrict Settlements on Mangrove Ecosystems in Manado Coastal City
Authors: Kumurur V A 
Published: October 2019

Abstract
Based on the results of the studies by Sasauw et al (2016), the ecological conditions in the area of mangroves in Manado city is unstable, evidenced by the low diversity of species R. apiculata, although density and frequency of species have high value. Bunaken is one sub­district in the coastal city of Manado, consisting of five sub-rurals, where the 3 villages (Molas, Meras and Tongkaina Neighborhood) are located in the coastal area and 2 sub-districts, such as Pandu and Bailang neighborhood are in mountainous regions. Residential area bordering the Bahowo mangrove area (84 ha) is green open space as Manado city protected area. To obtain and analyse data on settlement patterns, the ArcGis software with satellite map is utilized and observations of the infrastructure condition are conducted in the three areas of urban villages located on the shore (adjacent to the area of mangrove forests). The results indicated that the housing pattern of three villages is the combination form (linear and cluster), but linear form is more dominant. In general, the pattern of residential infrastructure networks, especially roads and drainage channels (grey water) is dominant in the direction of the road network and ends in the mangrove forest area.
Contesting Historic Urban Space: Dispute Over Heritage Conservation of Colonial Alun-Alun in Serang, Indonesia
Authors: Syahid M A A , Kurniawan K R 
Published: October 2019

Abstract
Urban preservation program in many cities has been challenged by particular interests and heterogeneous perspectives towards the idea of building a modern city. The dispute often rises over uncertain controversial spatial planning to erect any new large structure on historic urban space. In the case of colonial alun-alun of Serang, the issue occurred when the city ex-mayor designed to build a new Masjid Agung (Great Mosque) on the remaining empty spaces of alun-alun, amidst the pros and cons amongst urban activists, religious groups, and community. Contrary to all expectations, due to the political regime changes, the new government deals with the former idea by collaborating together with university team by justifying in academic attitude to assess the feasibility of the alun-alun to bear such project. The results instead indicated the un-feasibility of it, primarily due to its registered later status as cagar budaya (cultural heritage). It certainly triggered more disputes following the unsatisfactory comments, heated debates and rebuttals during the open presentation session with the government and public citizens of Serang city. This article hence is the proceeding of authors’ experiences after conducting the feasibility study for 2 (two) months, by discussing and encouraging extensive views about the dynamics of power relations involving academics, bureaucrats, and urban citizens in contesting the historic urban space as urban heritage beyond the ‘scientific’ study. Therefore, besides putting efforts on mere analysis the importance of alun-alun of Serang and its heritage values, this article also inclines to underline the intentions of local strategies in utilizing presevation issues as tools throughout political decisions for succeeding multiple aims. The research method then investigates the prescribed regulations, law, urban policies and its implementations in regards with the spatial planning and preservation actions in the level of city. The result of this research is also expected to exemplify the conservation process of colonial alun-alun as an architectural element, urban space, and cultural heritage in local cities of Indonesia.
Trace element and mineral composition of Ediacaran-early Cambrian strata in South China and their geochemical implications
Authors: Deng Q , Xu J B , Wei Z W , Cheng B , Faboya O L , Liao Z W 
Published: October 2019

Abstract
Ediacaran-early Cambrian is a critical interval in the evolution of atmosphere-ocean environment and biodiversity. The continuous Ediacaran-Cambrian strata in South China provide a good opportunity for investigating the associated environment with its ecological evolution. In this study, outcrop sedimentary rock samples collected from the Dongkanshang and Fengtan sections on the Yangtze Block were analyzed for their mineral and trace element compositions. The results showed some heterogeneity in the geochemistry of the Ediacaran-early Cambrian ocean in South China. Based on the U/Th, V/(V+Ni), V/Cr, and Ni/Co ratios, the middle-deep water was predominated by anoxic or euxinic condition with interferences from several transient oxidation events. The basinal Fengtan section indicates a more reduced depositional environment when compared with the slope Dongkanshang section. This shows that the seawater oxygenation was a gradual process that expanded from shallow to deep water.
Characteristics of desorption gas of lacustrine shale in the Ordos Basin, China
Authors: Li Jing , Zhou Shixin , Fu Deliang , Chen Kefei , Zhang Chen , Sun Zexiang , Li Pengpeng 
Published: October 2019

Abstract
Desorption gases of four lacustrine shale cores from the Triassic Yanchang formation of the Ordos Basin, China were collected, and their molecular and carbon isotope compositions were analyzed in this study. Results show that hydrocarbon gases of desorption gas are dominated by methane with relatively low dryness coefficient ranging from 0.45 to 0.82. The 513C values for hydrocarbon gases increase with increasing carbon number, and which for methane ranges from -57.15%« to -53.71%«. The hydrocarbon gases generally derived from a mixed origin with primary contribution from thermogenic processes. Desorption gases of sample YK-340.7 could experience biodegradation for its relatively high dryness coefficient and (iC4H10 + iC5H12) / (nC4H10 + nC5H12) value. A significant depletion of13C for methane was observed during desorption process, the reason for which could be differences in molecular mobility of the12CH4 and13CH4. Changes in the 513Cethane and 513Cpropane during desorption process are week.
The Rock-Eval Pyrolysis and Hydrocarbon Generation Kinetic of Four Coal Samples from Different Areas, China
Authors: Sun Yu , Fu Xiaodong , Liao Lingling , Wang Yunpeng 
Published: October 2019

Abstract
Rock-Eval pyrolysis and hydrocarbon generation kinetic are effective and extensive methods to evaluate source rock. In this study, we chose four coal samples from different areas in China including Fuxing, Guangyuan, Fushun and Taiyuanzu. The results show that Fushun has the highest hydrocarbon generation capacity (399-427mg/g), the lowest dominant activation energy (47Kcal/mol) and frequency factor (1.32*1012/s), which has the highest transformation ratio at different heating rates. It is easy to evaluate the hydrocarbon potential of Fushun. But Fuxing, Guangyuan and Taiyuanzu have different frequency factors and activation energies. In the multiple frequency factors (MFF) model, it is difficult to evaluate hydrocarbon potential by activation energies when frequency factors are different. This study evaluates hydrocarbon potential by comparing transformation ratio at universal and geological heating rate. This is because transformation ratio is a comprehensive result of frequency factor and activation energy. In addition, different heating rates affect the hydrocarbon generation rate of coal samples, the hydrocarbon generation rate is positive with heating rates. For example, the hydrocarbon generation rate of Fushun at 5, 25°C/min are 0.0013 and 0.0051 mg/g.s1. And the temperature difference (AT) of main hydrocarbon generation period heated at 3°C/my and 5, 15, 25°C/min are different, which are 21-52 and 53-99°C.
Irradiation caused petroleum generation: Evidence from simulation experiments at room temperature
Authors: Wang H J , Zhao W Z , Cai Y W , Wang X M , He K , Zhang S C 
Published: October 2019

Abstract
Organic-rich shale often receives high doses of radiation from radionuclides, mostly U. Radiogenic heating and particles bombardment can lead to petroleum generation. Artificial irradiation of organic matter with neutrons at room temperature confirms these benefits. Produced bitumen was rich in asphaltene and aromatic compounds. An improved method is used to evaluate the effects of radioactivity on the petroleum generation potential. The maximum oil generation potential increases up to 31% in the artificial irradiation dose range of 280-680 Mrad. Natural irradiation caused by U should be taken into account when evaluating petroleum resources to mitigate the charge risks in both conventional and unconventional hydrocarbons exploration, particularly for Palaeozoic and Proterozoic sediment.
Cause Analysis of Flat Concave Defects on the Inner Surface at the end of T91 Alloy-Steel Tubes
Authors: Sun Zhenguo , Li Yuyan , Li Fei , Ye Jun 
Published: October 2019

Abstract
The concave defects on the inner surface at the end of T91 alloy-steel tubes were analysed by macroscopic morphology analysis, electron microscope scanning and energy spectrum analysis, metallographic analysis and anion analysis of corrosion products. The composition of water sample and oil sample of finned winding and oil immersion treatment was also analysed. It was found that this kind of defect was not caused by the preservation environment of steel tube, the treatment of finned winding and oil immersion. The defect should be related to the quality of steel tube blank or the processing technology of steel tube.
Study of the Effect of Focusing and Oscillation of Electron Beam on the Structure and Properties of Welded Seams
Authors: Sitnikov I.V. , Belenkiy V.Ya. , Olshanskaya T.V. 
Published: October 2019

Abstract
This paper presents the results of a study of the effect of focusing and oscillation of the electron beam on the structure, and the properties of welds made of heat-resistant pearlitic steel. Electron-beam welding using a static beam does not provide a uniform weld structure. According to the results of microhardness measurement, the weld metal has a high hardness with values on average 500 HV. The reason for this may be insufficient intensity of the mixing processes and insufficient residence time of the weld pool in the molten state. The use of electron beam sweeps during welding leads to a decrease in the microhardness of the weld metal to values of 450 HV. Also, the application of electron beam sweeps improves the weld geometry - a smoother transition from the upper part of the weld to the middle, more rounded shape of the root of the weld.
Study on the Design of Cutting Disc in Ultrasonic-assisted Machining of Honeycomb Composites
Authors: Xia Yaozhi , Zhang Jianfu , Wu Zhijun , Feng Pingfa , Yu Dingwen 
Published: October 2019

Abstract
To study the influences of geometrical parameters on the design of ultrasonic-assisted cutting disc tool for honeycomb composites, a finite element model integrating the cutting disk and ultrasonic horn was established. The performance of the output amplitude of the cutting disc was analyzed under different geometrical parameters including cutter radius, cutter thickness and anterior angle. Then the influences of the geometrical parameters on the energy density and bending rigidity of the cutting disc were discussed. The simulation results shown that with the increase of cutter radius, both the energy density and rigidity decreased, and the amplitude at the cutting edge increased firstly and then decreased under the interaction of the energy density and rigidity. There was an ideal interval of radius within which the amplitude reached the maximum. With the increase of cutter thickness and anterior angle, the energy density decreased while the rigidity increased, the amplitude at the cutting edge presented a declining trend.
Preparation of Nanocomposites of Polypyrrole-metal (or Metal Oxide) on the Surface of V2O5 Coated Cathode through a One-step Method
Authors: Li Ziyang , Li Jiawei , He Yuan , Zhou Kun , Ji Huaran , Shi Wei , Sun Yanan , Wu Ting , Ge Dongtao 
Published: October 2019

Abstract
Simultaneous formation of polypyrrole (PPy) and metal (or metal oxide) on a single electrode is particularly challenging because the electrodeposition of PPy and metal (or metal oxide) usually requires opposite potentials. Namely, the preparation of PPy needs an oxidation potential while the metal (or metal oxide) needs a reduction potential. In the present work, nanocomposites of PPy and metal (or metal oxide) were prepared successfully on the cathode by a one-step process, in which V2O5 coated titanium sheet was applied as cathode. In fact, two chemical reactions happened here at the same time. The first reaction was the chemical preparation of PPy on the cathode by the use of V2O5 as oxidant and the second reaction was the electrochemical formation of metal (or metal oxide) on the surface of the same cathode. As a result, nanocomposites of PPy and metal (or metal oxide) were one-step prepared on a single electrode. The morphology, composition and structure of nanocomposites were investigated via field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) and X-ray diffraction (XRD). Furthermore, PPy-Ag nanocomposite was prepared and used as a sensor to evaluate the electrocatalytic performance of H2O2. It was found that the sensor displayed excellent H2O2-sensing properties and a feasibility for practical applications. These results imply that the present one-step process not only presents a simple, facial and efficient way for the formation of PPy-based nanocomposites but also exhibits great potential to improve the application performance and broaden the applied fields of the nanocomposites.
Analysis of Factors Affecting Performance of Cement-Bentonite Mud Impervious Wall
Authors: Ding Jihui , Gan Yu , Zhang Tianyu , Yan Meng , Zhao Qi 
Published: October 2019

Abstract
The triaxial unconsolidated undrained test, unconfined compressive strength test and variable head penetration test were used to study the water-cement ratio (Rwc
between 3.85 and 5.88) and water-bentonite ratio (Rwb
between 3.85 and 7.14) in different indoor mix ratios. Effect on mechanical properties and permeability of cement-bentonite mud impervious wall. The test results showed that: (1) The unconfined compressive strength of cement-bentonite anti-seepage wall has a double exponential function relationship with water-cement ratio and water-bentonite ratio. (2) When the water-bentonite ratio is constant, the deformation modulus increases with the decrease of water-cement ratio. When the water-cement ratio is constant, the influence of water-bentonite ratio on deformation modulus is not obvious, but too much bentonite will reduce deformation modulus. (3) As the strength of the cut-off wall increases, the modulus of deformation also increases, and there is a good linear relationship between the two. (4) The permeability coefficient of cement-bentonite anti-seepage wall has a double exponential function relationship with water-cement ratio and water-bentonite ratio.
Research on Shear Lag Effect of Three-span Continuous Curved Steel Box Girder Bridge
Authors: Chen Kongliang , Wang Liankun , Zhang Wenzhi 
Published: October 2019

Abstract
The normal stress of box-section beam under symmetrical load is the non-uniform characteristic called shear lag effect. Based on actual engineering project, the plate-beam finite element method is used to study the shear lag effect of the three-span continuous-curve steel box-girder bridge under the variety conditions of the curve radius, and the width span ratio, and the distribution of the shear lag effect in the longitudinal and horizontal direction under the symmetrical load are summarized in this paper, providing references for design of steel box-girder bridge. The results show that the shear lags of steel box girders are all positive shear lags under symmetrical loads. Under the conditions of three parameters, the curve radius and the width-span ratio have a great influence on the shear lag effect of steel box girders, and the high-span ratio change has no obvious effect on the shear lag effect, and the shear lag effect of bottom plate is far less severe than the top plate.
Effects of Superfine Grinding on the Structure, Bioactive Components and Antioxidant Activity of Pineapple Leaf Fiber
Authors: Cui Lihong , Li Jihua , Wang Ze , Wei Xiaoyi , Xia Wen , Zhou Wei 
Published: October 2019

Abstract
To investigate the influence of particle size of pineapple leaf fiber (PALF) powders on their structure, bioactive components and antioxidant activities, different sized PALF powders were prepared using superfine grinding. Particle sizes and surface morphology of PALF powders were examined with laser diffraction instrument and scanning electron microscopy (SEM) respectively. Meanwhile, the contents of polyphenols and flavonoids in PALF powders were determined by UV method, and the antioxidant capacity was investigated. During the superfine grinding process, as the time prolonged, the particle size of PALF powders sharply decreased and the surface area increased. When the grinding time reached to 60 min, PALF superfine powder having a median diameter of 18.209 μm was obtained. Scanning electron micrograph displayed that the shape and particle size of superfine powders were uniform. After superfine pulverization, the bioactive components of PALF can be well preserved. The total polyphenols content of PALF superfine powder was 2.347 mg GAE/g DW and the total flavonoids content was 0.227 mg RE/g DW. Therefore, the antioxidant capacity of PALF superfine powder remains high level, including DPPH radical scavenging rate (0.167 mg GAE/g DW), ABTS radical scavenging rate (0.105 mg GAE/g DW) and total antioxidant activity (67.379 unit/g DW). The results demonstrated that PALF superfine powder has good potential to be used in functional food, cosmetics and biomedical materials.
Design of Special Lathe for Taper Turning Slender Shaft
Authors: Jiang Jiefeng , Huang Xiaodong 
Published: October 2019

Abstract
Based on the analysis of the machining process characteristics for special slender shaft work-piece, considering the increase in taper turning efficiency and accuracy, a new clamping scheme for machining both ends of slender shaft is put forward, which also includes using pulling tail-stock instead of traditional pushing, using follow-manipulator instead of follow-rest. Following the clamping scheme, the dual drive device, the tail-stock with pulling device and the manipulators are designed, then the parts are integrated into the special lathe for taper turning slender shaft.