bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research and Optimization of Nonlinear Damping Vibration Isolator based on Parallelogram Linkage
Authors: Luo Junwen , Zhang Jianrun 
Published: April 2021

Abstract
A method is proposed to analyse and optimize the performance of nonlinear damping vibration isolator based on parallelogram linkage. Establish the vibration differential equation of the system, and perform Taylor expansion of the nonlinear damping coefficient, and then obtain the steady-state response of the system under harmonic excitation through methods such as perturbation method and averaging method. The displacement transfer rate curve of the steady-state response has a high degree of fitting with the curve obtained by the multi-body dynamics software, which proves the accuracy of the method. Taking the resonant peak of the steady-state response as the optimization target, and taking the high-frequency transmission rate as the constraint condition, design and optimize the rod length and damping coefficient of the mechanism. Comparing with traditional damping, the optimized nonlinear damping has a more obvious suppression effect on the resonance peak when both transmission rates of steady-state response are close at high frequencies. The analysis method in this paper is convenient to parameterize and has good programmability, which means that it provides a simple and effective new method for the parameterization and optimization design of the nonlinear damping vibration isolator based on parallelogram linkage.
Research on Structure Design of The Dual Steel Disc in Brake Based on Rigid-Flexible Coupling Simulation Analysis
Authors: Li Changyuan , Zhang Jianrun 
Published: April 2021

Abstract
A research method is proposed to improve the structure of the dual steel disc in wet multi-disc brake based on virtual prototype simulation analysis. The finite element flexible body model of the dual steel disc was established by CAE software, and the accuracy of the flexible body model was verified by the method of identifying natural frequency by near-field acoustic radiation. Based on the dependable finite element flexible body model, the rigid-flexible coupling virtual prototype model of the wet multi-disc brake was established, and the dynamic simulation analysis of brake during the braking period was processed. According to the results of brake dynamics simulation, the time-frequency characteristics of friction pair contact force and the change characteristics of piston spring force during the braking process are analysed. Based on credible dynamic simulation analysis, the mises stress distribution and deformation changes of the steel disc at critical moments are acquired. Depending on the virtual prototype analysis results, it is powerful to guide the structural design and improvement of the dual disc, and some phenomena and problems which are difficult to find through actual measurement can be researched effectively.
Active Control of the Space-borne Antenna Reflector Considering Thermal Load
Authors: Huang Rui , Sun Beibei 
Published: April 2021

Abstract
In order to improve the shape accuracy of the space-borne antenna reflector under the interference of uncertain load, the active control method of the reflector shape was studied. First, a finite element model of the thermal and mechanical coupling of the space-borne antenna reflector was established. Taking the uncertain load into account, the radial basis function (RBF) neural network was used to estimate the error, and the adaptive controller was designed according to the estimation error. Based on the Lyapunov stability theory, the stability of the controller was analyzed. Finally, the adaptive control of the space-borne antenna reflector was simulated numerically. The simulation results show that the method of RBF neural network adaptive control is effective by reducing the shape error of the reflector in a short time when considering the uncertain load.
Thermomechanical Coupling Simulation and Analysis of Wet Multi-Disc Brakes During Emergency Braking
Authors: Wang Ziyun , Zhang Jianrun 
Published: April 2021

Abstract
The main reason for the thermal failure of wet multi-disc brakes during emergency braking is thermoelastic instability due to thermomechanical coupling. To analyse the phenomena, a three-dimensional finite element model of a wet multi-disc brake friction pair is built and numerical simulation is carried out with thermal-structural coupling method, based on ANSYS software. The contact pressure distribution, temperature and stress field during emergency braking are obtained. The results show that high temperature is located at the outer diameter of friction linings during emergency braking, large temperature gradient and stress gradient are generated at edges of radial grooves, which lead to the friction disc warp. Through simulation and analysis, this paper can provide a basis for engineering application and design research of wet multi-disc brakes.
The Use of Digital Advancement Technology in Protecting the Longmen Grottoes Art
Authors: Li Xiaoshu , Mohd Yusof Mohd Johari , Hiong Ser Wue , Perumal Velu 
Published: April 2021

Abstract
Longmen Grottoes, one of the four major grottoes in China, has been listed on the “World Heritage List” and its excavated time was as long as four hundred years ago, which had gone through six different dynasties. Due to the different excavated times, this Buddha statue in each hole or niche has its unique features in clothing, face, body shape and other aspects. Due to climatic changes of wind, rain, frost, and snow, many of these Buddha statues have lost their original appearance. Hence, this study aims to use modern digital restoration technology to restore these grottoes in order enabling many people to appreciate these type of arts through the internet. This method will not only reduce the secondary destruction, but also may allow people to understand and appreciate better the grotto art through the internet. Furthermore, through this restoration, the complete history from a broken Buddha statue can be learned, and even more the culture of ancient China can be explored. The digital restoration of these grotto Buddha statues mainly adopts the modern technological means and detailed research materials of digital virtual restoration, the solemn dharma images that the real thing cannot be traced back are reproduced by virtual technology. The digital simulation is carried out by analyzing the apparel, face, and figure of the Buddha statues in the representative niches of different dynasties. The digital technology for restoring the Buddha statues not only avoids destruction of the Buddhas but also can be seen as efforts in restoring and protecting the grotto art.
Research on Symbol Color of Automotive Augmented Reality Head-up Display
Authors: Zhou Xingjian , Yin Guodong 
Published: April 2021

Abstract
Complex environmental information and lighting conditions will affect the usability of automotive augmented reality display in the outdoor environment. In this way, users’ recognition and semantic understanding of AR-HUD information may be affected. The driver’s cognitive performance directly affects the driving safety and driving experience, so the color-coding of AR-HUD is very important for the driver to identify information easily, quickly, and accurately. Taken the automotive AR-HUD display as the object, this paper compared the visibility and significance of foreground object colors in different backgrounds in the way of combining both subjective and objective experiment methods. The experimental results show that the color of white, cyan, and green are recommended to be used in automotive AR-HUD display, which has a positive influence to improving the automobile AR-HUD color design.
A Study on the SW Coding Education Method Using Arduino in the Age of Internet of Things
Authors: Chun Hyunjin 
Published: April 2021

Abstract
With the advent of the Fourth Industrial Revolution, education suitable for future society is important. In general, the talent required in the future society is a person with problem-solving skills and creativity. In developed countries like the United States, various educational methods are studied to improve these abilities. A typical education is computer software education. In particular, with the development of the Internet of Things, computer coding education using hardware is becoming more and more important. So this paper tries to study the SW coding education method using Arduino, the representative educational hardware. The results of the study are as follows. SW coding education should develop into a problem-solving curriculum. In particular, a curriculum should be developed to solve problems that can be found in our real lives. The results of this study can be basic data for computer software education related to the Internet of Things.
Development of banana in vitro from male bud culture supplemented with some concentration of sucrose and benzyladenine
Authors: Nandariyah  , Endang Y , Yunian T A 
Published: April 2021

Abstract
Conventional techniques of propagating banana plants with corms require a relatively long time (10-18 months) and the amount produced is limited due to deforestation and industrialization. So production and supply of quality products are becoming a great challenge. In addition, there is a need to develop climate-resilient crop to face the consequences of global warming in the near future. Plant tissue culture is a proven technique for producing banana seeds in large quantities, uniformly and in a short time to support good quality banana seeds. The banana flower meristem can be a potential explant. The banana flower meristem offers the opportunity to regenerate plants with agronomic characteristics and results that can be controlled. This study aimed to regenerate banana flowers in vitro with different sucrose and BA (Benzyladenine) concentrations. The study used a Completely Randomized Design (CRD), two factorials sucrose concentration with 4 levels (20 g/L, 25 g/L, 30 g/L, and 35 g/L) and BA concentration with 4 levels (2 ppm, 4 ppm, 6 ppm and 8 ppm). The results showed that the combination of BA and sucrose concentration had not directly induced organogenesis in banana flower explants. Growth and development of banana flower explants maximally form Cauliflower-Like Bodies.
Potentials use of leachate for turfgrass irrigation on soil coverage landfill Suwung Bali
Authors: Rahayu  
Published: April 2021

Abstract
Climate change affect water quality and impact water resources and water supply thus using leachate for grass irrigation is hard choice. Suwung landfill is the largest landfill in Bali and was planted with turfrass and arranged as a park. This study aims to determine the potential use of leachate water for irrigation of turfgrass and determine the type of grass that is survive and suitable for landfills cover and irrigated with leachate water. The study was survey of field and observation by purposive sampling to observe the growth of grass and followed by analysis of the characteristics of leachate water and well water and soil. Results showed that using non potable water landfill leachate for irrigation of turfgrass during one year showed local seashore paspalum grew well, local Bermuda and Zoysia matrella showed relatively less growth inhibition than the Bermuda hybrid and Axonopus compressus. Grass growth on top hills is more survival than in slope and foot hill areas.
Characterization on the hybrid of Dendrobium bigibbum from Maluku and Dendrobium lineale from Papua, Indonesia
Authors: Hartati S , Muliawati E S , Syarifah A N F 
Published: April 2021

Abstract
Climate change can potentially lead to reducing biodiversity, including orchids. One of the efforts to increase the biodiversity of orchids is through the crossing. This study aimed to determine the morphological characters of plants resulting from interspecific crosses between Dendrobium bigibbum from Maluku and Dendrobium liniale from Papua, also to compare them with the characters of their parents. In this study, morphological characterization was carried out on 14 accessions, 3 male parent accessions, 3 female parent accessions and 8 F1 offspring accessions. Characterization was carried out based on 30 characters, including stem, leaf, flower, pseudobulb, and root types. The research was conducted in two places, the identification of the parents was carried out at Indonesia Research Institute Botanical Garden Conservation Center in Bogor, Indonesia, while the identification of hybrids was carried out in Karangploso Village, Karanganyar Regency. Cluster analysis was performed using NTSYSpc version 2.02i program with the UPGMA SimQual function method. The results showed differences in leaf and flower morphology between accessions that were observed including size, shape, pattern, and color of the petals and sepals, but the shape and size of the pseudobulbs, color, size and shape. However, leaves tend to resemble one another.
Evaluation of in vitro activity of Ganoderma-antagonistic bacteria from peatland under acidic condition
Authors: Supriyanto  , Purwanto  , Poromarto S H , Supyani  
Published: April 2021

Abstract
As of 2017, 2.05 ha of Indonesia’s total oil palm area has been identified as peatlands. A large-scale peatland has caused oil palm commodities to be a global concern because they are thought to have contributed to the increase in greenhouse gas emissions that have triggered climate change. This research is an effort to resolve the main problems in the cultivation of oil palm on peatlands in a more environmentally friendly way. The main obstacle to oil palm cultivation on peatlands is Ganoderma fungi attacks that cause basal stem rot (BSR) disease, where the attack is higher than in mineral soils. Biological control is a prospective alternative way to control BSR disease. However, its development in peatlands is hampered by extremely low peat pH. The possible approach is to utilize appropriate biological control agents for peatlands. This study aimed to examine antagonistic bacteria’s from peatlands to control Ganoderma under low pH conditions in vitro. The bacterial isolates from peatlands were tested for antagonism against Ganoderma and tested for their growth ability in 2-7 pH situations. The results showed that from the West Kalimantan peatlands, Ganoderma-antagonistic bacteria grew at pH 2-4, even though the growth rate had decreased significantly. The isolates were E4B6, E2B12, E2B13, B3B11, and E2B3. These results indicate that these bacteria can be used in controlling oil palm BSR disease caused by Ganoderma in peatlands.
The effect of Andong (Cordyline terminalis) leave, one of the traditional plants in Bali as antioxidant and antibacterial
Authors: Bogoriani N W , Putra A A B , Wahjuni S , Heltyani W E , Dewi N P P M S , Sadin V Y K 
Published: April 2021

Abstract
Climate change can have a direct effect (e.g. changes in air temperature, increased ultraviolet radiation, and pollution) and indirect effect (such as increased incidence infectious diseases). Infectious diseases are the main cause of high human mortality, especially in developing countries like Indonesia. Andong plant (Cordyline terminalis) is one of Bali’s local plants, which is widely used as a drug for infections due to microbes resulting from climate change. This study aimed to observe the effect of Andong leaf extract as an antioxidant and antibacterial and to identify the compounds. This research design was carried out with sample preparation including cleaning, cutting, drying, grinding and sifting to powder. Extraction was done by maceration method. Phytochemical tests were then performed with color reagents. Antioxidant test was carried out using diphenyl picryl hydrazil hydrate (DPPH) method and antibacterial activity was determined by well diffusion method. Measurement of antioxidant compounds’ levels was determined spectrophotometrically and analysis of antioxidant compounds was carried out by the LC-MS/MS method. The result showed that the Andong leaf extract contained saponins, polyphenols, flavonoids, steroids, triterpenoids, phytosterols, amino acids and alkaloids. In the testing of antioxidant compounds, Andong leaf extract contained tannins was 3324.550±0.821 mg/100 g TAE, phenol was 1398.905±0.812 mg/100 g GAE and flavonoids was 1373.065±1.288 mg/100 g QE. Andong leaf extract reduced free radicals from DPPH with IC50 88.26±0.015 ppm and inhibited the three bacterial test results with significant differences compared to controls (p <0.05).
Morphological characterization of Calophyllum Inophyllum as a biodiesel
Authors: Yuniastuti E , Anjani I , Nandariyah  , Delfianti M N I 
Published: April 2021

Abstract
Nyamplung (Calophyllum inophyllum Linn.) is one of the most potential forest plant species to be flourished. C. inophyllum seed can be deformed into oil as biofuel. Biofuel is very important to mitigate climate change impact as it reduces greenhouse gas emission from transportation sector. Mostly C. inophyllum grows along the coastline, especially in Ngombol and Grabag, Purworejo. There are a lot of C. inophyllum plant populations at these sites, but its varieties are not studied yet, therefore it is necessary to study the characterization of its morphology. This study aimed to obtain morphological character data and analyze C. inophyllum plants’ diversity in Purworejo. Samples were selected intentionally (purposive sampling). Thus morphological data elaborated descriptively and the cluster was analyzed by NTSYS (Numerical Taxonomy and Multivariate Analysis System) program. The study showed the diversity and also the similarity of morphological characters. C. inophyllum fruit and seed’s morphological character had its fruit length 2.1 – 3.1 cm, fruit diameter 1.93 – 1.95 cm, fruit weight 3.04 – 12.82 g, fruit shape is spherical/round, and fruit hardness 92.5 – 99.57 N. Moreover, it had seed length 1.16 – 2.22 cm, seed width 1.16 – 1.79 cm, seed weight 0.74 – 3.06 g, seed shape were spheroid, ellipsoid, reniform and the color was yellow. The morphological characters’ variance was 26%, which was categorized as low and Grabag district had more potential for growing and production than Ngombol regency.
Effects of organic fertilizer and water stress on Valerian biomass (Valeriana javanica (BL.) DC.) for domestication
Authors: Pujiasmanto B , Yunindanova M B , Supriyono  , Triharyanto E 
Published: April 2021

Abstract
Valerian (Valeriana javanica BL.) DC.) has the potential to be developed as a medicinal plant. However, this plant is still collected from nature, so this will threaten Valerian germplasm, varying quality and uncertain crop yields. Moreover, the impact of climate change, such as drought and lack of nutrients in the soil, could threaten Valerian’s presence. This research aimed to investigate the tolerance level of Valerian on several water stress levels and influence of organic fertilizer on the plant biomass. This experiment utilized completely randomized design with 2 factors and three repetitions. The first factor was organic fertilizer consisting of no fertilizer (control), cow manure, and goat manure. The second factor was water stress consisting of 100% field capacity, 80% field capacity, 60% field capacity and 40% field capacity. The result depicted that 40% field capacity produced the lowest biomass compared to 60 %, 80 % and 100 % field capacity. In addition, goat manure resulted in higher biomass than cow manure.
Conservation of Diospyros spp. in Purwodadi Botanic Garden, Indonesia with an outlook on carbon storage
Authors: Rindyastuti R 
Published: April 2021

Abstract
Plant conservation was widely implemented to mitigate the global risk of high gas emissions with an important carbon capture ability in this industrial era. Therefore, recognizing and understanding plant species richness could contribute to various environmental problems in the future. Since 1955, Purwodadi Botanic Garden-LIPI (PBG), Indonesia, has been collecting Diospyros spp. (Ebenaceae). The purpose of this study were 1) to record the Diospyros spp. collection including endemic species and determine the taxonomical status of unidentified plants, and 2) discuss the carbon storage of Diospyros species. The study was conducted from May 2016 to February 2020. The method used in this study was morphological characterization to record plant collection, taxonomical literatures and herbarium specimens. Biomass was measured using non-destructive method. Plant reidentification resulted in 28 species with 6 new identified plant species i.e. D. pilosanthera var. Polyalthioides, D. perfida, D. diepenhorstii,
D. amboinensis,
D greshoffiana and D. pilosanthera. Only 0.07 % of the total recorded endemic and threatened species in Indonesia are collected in PBG. Diospyros species showed high biomass and could be promoted in revegetation programs based on carbon storage potentials. Conserving Diospyros is important for climate change mitigation success by implementing plant diversity for carbon capture.
Analysis of key locations as indicators for extreme climate impacts in supporting climate change adaptation in Indonesia
Authors: Estiningtyas W , Syahbuddin H , Harmanto  , Pramudia A , Dermoredjo S K 
Published: April 2021

Abstract
Indonesia has a large tropical archipelago with a complex and dynamic climate. Climate change has a significant impact especially in the agriculture sector where the magnitude of such impact varies from one location to another. Information about the magnitude of the impact and its monitoring in each location is still limited. The research objective was to determine the key locations for Indonesia’s climate variability based on SST Niño 3.4 index in El-Niño and La-Niña conditions. More than 4000 rain-stations data were used in this analysis. Key locations were determined based on a strong and significant correlation between rainfall and SST Niño 3.4 index under El-Niño and La-Niña conditions with a lag of 1 to 4 months. Based on the analysis results, 6 rain stations could be used as key locations on El-Niño and 5 rain stations on La-Nina condition. Key locations can be used as priority locations for impact analysis and monitoring of the impact of extreme climate, especially in the agricultural sector.
Geographical and seasonal characteristics of APHRODITE and GSMaP in Lao P.D.R
Authors: Kawai H , Zaki M K , Noda K 
Published: April 2021

Abstract
Water-related hazards account for 90 percent of all-natural hazards, and their frequency is generally rising, in association with climate change. To combat climate change, real-time and gridded precipitation data is important, especially where no ground observation is operated. Hence, this study aimed to assess the performances of different gridded precipitation datasets, APHRODITE and GSMaP in geographical and climate terms, in Lao P.D.R. For the elevation factor, precipitation at the time of conversion from over to underestimation of GSMaP was found to be dependent on elevation, as the conversions occur with lower precipitation in higher elevation classes. About the climate factor, we also found that the conversion happened at smallest precipitation in the end of rainy season, then beginning of rainy season and then middle of the rainy season.
Long-term trends of diurnal rainfall and hydro-meteorological disaster in the new capital city of Indonesia
Authors: Zaki M K , Noda K , Ito K , Komariah  , Ariyanto D P 
Published: April 2021

Abstract
Understanding how extremes are changing in long-term rainfall conditions is an important first step for planning appropriate adaptation measures of climate change. The purpose of this study is to investigate an uneven precipitation distribution and hydrometeorological events through the long-term trend of precipitation in Penajam Paser Utara, the new capital city of Indonesia. We used gridded precipitation APHRODITE and Mann-Kendall trend test over 60 years (1954-2015). The results showed the number of consecutive wet days (CWD) is higher than consecutive dry days (CDD). It also makes the number of floods larger than the drought. Even, the trend of rainfall was decreased from 1990 to 2015.