bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation of tetrahedral Ag3PO4 and mechanism of photocatalytic degradation of RB-42
Authors: Wei Xueyu , Xu Xiaoping , Yang Xiaofan , Liu Zhigang 
Published: November 2021

Abstract
In this study, silver nitrate and sodium phosphate were used as raw materials to prepare highly active Ag3PO4 photocatalyst with visible light response. The structure, morphology and composition of the samples of the obtained samples were characterized by XRD, SEM and XPS. Moreover, the photocatalytic activity was also investigated by means of degradation of reactive black-42(RB-42) in water. The effect of solution on photocatalytic degradation of RB-42 was investigated through the analysis of photocatalytic degradation kinetics. The results were showed that the nano Ag3PO4 is tetrahedral crystal. exhibit excellent efficient photocatalytic activity for the degradation of RB-42. when the addition of concentration of RB-42 was 10 mg·L, pH was 5.8 and the amount of catalyst was 50mg·L, the obtained sample removal efficiency was 80.7% under visible light irradiation. In addition, free radical capture experiments showed that •OH− was the main active substance in the reaction system.
Numerical study of combustion and heat transfer in a composite heat carrier generator
Authors: Yu Cong , Shi Ling , Hu Jiaying , Liu Hongjiao 
Published: November 2021

Abstract
To investigate the operational problems of the composite heat carrier generator (CHCG) in actual industrial applications such as overheating and poor safety performance, an integrated analytical model was established. For this model, the commercial software Fluent was first applied to simulate the gas-liquid turbulent flow, diesel vaporization and combustion, and the mixing process between the flue gas and the preheated water. Taking the parameters obtained from the Fluent model as the boundary condition, an indirect contact heat transfer model considering the heat transfer between the hot flue gas and the cold water has been solved. Based on this model, the areas where the phenomena of overheating and high thermal stress are prone to occur have been determined, and the size of the water sleeve has been redesigned.
Design and Analysis of a Laminated Composite Tube
Authors: Ma Zhuqiao , Ren Zheyu , Zhang Yufan , Yang Min 
Published: November 2021

AbstractPiping is an important material for fluid transportation in modern industry, and well-structured piping can reduce losses due to maintenance and replacement downtime. Therefore it is necessary to design and analyze the pipes in order to optimize their structure. This paper focuses on composite laminated pipes. In this design case, the structural analysis of this pipe will be carried out by applying the laminate theory, and the structural analysis model will be established by using Mathcad software. The stress and strain of each laminate will be calculated by entering the winding angle and the corresponding equations in this software. The final optimal winding Angle can be determined by verifying the winding angles that can be maintained under maximum stress failure criteria using Mathcad contours and detailed tables of winding and torsion angles.
Study on Fire Resistance of Floor Structures in High-speed Train
Authors: Yuan R N , Qin Y R , Lu S X 
Published: November 2021

Abstract
According to the standard EN 45545, fire resistant tests of floor structures in high-speed train were carried out. Two typical floor structures which were placed in the passenger train were tested. Integrity and insulation are main performance criteria to evaluate fire resistance of floor structures. The furnace temperature is in accordance with the requirements in the standard ISO 834. The surface temperature and deflection were recorded with time. Glass wool and aluminium corrugated sandwich structure in two structures were burned through. The experiments were terminated at 30 minutes and 31 minutes respectively for the two structures. A large amount of smoke and the sound of cracking of the exposed surface of the test piece were produced, although the unexposed surface of test pieces did not reach the failure condition.
3D printing-directed flexible strain sensors of accordion-like architecture to achieve ultrastretchability with the assist of ultrasonic cavitation treatment
Authors: Qu Y F , Ma J H , He Y Q , Zhang L , Ren F C , Li B 
Published: November 2021

Abstract
A new class of accordion-like cellular architecture with sinusoidal struts is designed to enhance the planar stretchability of cellular solids, aiming to fabricate flexible strain sensors with ultrastretchability. The combination manufacturing process of fused deposition modeling (FDM) 3D printing technique and ultrasonic cavitation-enabled treatment was introduced into the fabrication of flexible strain sensors made of thermoplastic polyurethane (TPU) substrate and carbon nanotubes (CNTs). A negative Poisson’s ratio (NPR) architecture made of TPU was firstly 3D-printed by FDM. The ultrasonic cavitation treatment was then conducted on the soft auxetic structure immersing in CNTs liquid, aiming to embed the CNTs into the surface layer of the flexible TPU substrate with NPR configurations. Instead of 3D printing the TPU matrix composite after hybridization inside the matrix material, the hybrid manufacturing procedure can ensure that the intrinsic excellent mechanical properties of TPU are not embrittled. Besides, the sinusoidal struts in accordion-like cellular architectures offer a design route to extend the material property chart to achieve ultrahigh stretchability in lightweight 3D printable flexible polymers for the applications that require combined stretchability, lightweight, and energy absorption such as soft robotics, stretchable electronics, and wearable protection shields.
Subseasonal prediction of the 2020 Great Barrier Reef and Coral Sea marine heatwave
Authors: Benthuysen Jessica A , Smith Grant A , Spillman Claire M , Steinberg Craig R 
Published: November 2021

Abstract
The 2020 marine heatwave (MHW) in the Great Barrier Reef (GBR) and Coral Sea led to mass coral bleaching. Sea surface temperature anomalies reached +1.7 °C for the whole of the GBR and Coral Sea and exceeded +2 °C across broad regions (referenced to 1990–2012). The MHW reached Category 2 (Strong) and warm anomalies peaked between mid-February and mid-March 2020. The MHW’s peak intensity aligned with regions of reduced cloud cover and weak wind speeds. We used a MHW framework to assess the ability of an operational coupled ocean-atmosphere prediction system (Australian Community Climate and Earth System Simulator Seasonal version 1) to capture the MHW’s severity, duration, and spatial extent. For initial week predictions, the predicted MHW severity generally agreed with the magnitude and spatial extent of the observed severity for that week. The model ensemble mean did not capture the MHW’s development phase at lead times beyond the first week. The model underestimated the MHW’s spatial extent, which reached up to 95% of the study area with at least Moderate severity and up to 43% with at least Strong severity. However, most forecast ensemble members correctly predicted the period of Strong severity in the first week of the model forecast. The model correctly predicted MHW conditions to persist from mid-February to mid-March but did not capture the end of the MHW. The inability to predict the end of the event and other periods of less skilful prediction were related to subseasonal variability owing to weather systems, including the passage of tropical cyclones not simulated in the model. On subseasonal time scale, evaluating daily to weekly forecasts of ocean temperature extremes is an important step toward implementing methods for developing operational forecast extremes products for use in early warning systems.
Probing multipartite entanglement, coherence and quantum information preservation under classical Ornstein–Uhlenbeck noise
Authors: Rahman Atta Ur , Javed Muhammad , Ji ZhaoXu , Ullah Arif 
Published: November 2021

Abstract
We address entanglement, coherence, and information protection in a system of four non-interacting qubits coupled with different classical environments, namely: common, bipartite, tripartite, and independent environments described by Ornstein–Uhlenbeck (ORU) noise. We show that quantum information preserved by the four qubit state is more dependent on the coherence than the entanglement using time-dependent entanglement witness, purity, and Shannon entropy. We find these two quantum phenomena directly interrelated and highly vulnerable in environments with ORU noise, resulting in the pure exponential decay of a considerable amount. The current Markovian dynamical map, as well as suppression of the fluctuating character of the environments, are observed to be entirely attributable to the Gaussian nature of the noise. The increasing number of environments are witnessed to speed up the amount of decay. Unlike other noises, the current noise parameter’s flexible range is readily exploitable, ensuring long enough preserved memory properties. The four-qubit GHZ state, besides having a large information storage potential, stands partially entangled and coherent in common environments for an indefinite duration. In addition, we derive computational values for each system-environment interaction, which will help quantum practitioners to optimize the related classical environments.
Fluctuations in heat engines
Authors: Holubec Viktor , Ryabov Artem 
Published: November 2021

Abstract
At the dawn of thermodynamics, Carnot’s constraint on efficiency of heat engines stimulated the formulation of one of the most universal physical principles, the second law of thermodynamics. In recent years, the field of heat engines acquired a new twist due to enormous efforts to develop and describe microscopic machines based on systems as small as single atoms. At microscales, fluctuations are an inherent part of dynamics and thermodynamic variables such as work and heat fluctuate. Novel probabilistic formulations of the second law imply general symmetries and limitations for the fluctuating output power and efficiency of the small heat engines. Will their complete understanding ignite a similar revolution as the discovery of the second law? Here, we review the known general results concerning fluctuations in the performance of small heat engines. To make the discussion more transparent, we illustrate the main abstract findings on exactly solvable models and provide a thorough theoretical introduction for newcomers to the field.
Determination of the level of seismic hazard in Yogyakarta using fuzzy simple additive weighting method
Authors: Saptaningtyas F Y , Abadi A M , Musthofa  , Utomo E Y , Sugiyarto A W 
Published: November 2021

Abstract
This study aims to obtain a mapping of seismic hazard vulnerability of Special Region of Yogyakarta (DIY) using the Fuzzy Simple Additive Weighting (FSAW) method. This mapping is serves as an act of mitigation for earthquake disasters to reduce the risk of earthquake disasters and minimize fatalities or losses in earthquake-prone areas. The factors used construct the mapping of earthquake-prone areas in Yogyakarta are social, physical, and economic vulnerabilities. Each factor has several variables. The data of this research were taken from the Central Bureau of Statistics (BPS) and the National Disaster Management Agency (BNPB) of the Special Region of Yogyakarta from 2014 to 2017. The FSAW method was used to determine the level of seismic hazard for each sub-district in DIY with a high, medium, or low vulnerability category. The steps taken in the FSAW method are (1) performing fuzzification for each variable, (2) normalizing, (3) determining the weigh of each variable, (4) determining the classification of the result; whether it is categorized under high, medium, or low level. The result from this study is a map that shows areas in each district of Special Region of Yogyakarta with high, medium, and low seismic vulnerability. Based on the social, economic and physical vulnerability factors, it was found that every sub-district in Yogyakarta City were categorized under the high-level vulnerability, while the sub-districts in Bantul, Gunungkidul, Kulonprogo and Sleman Regencies had the average level of medium.
Developing Disaster Mitigation Education with Local Wisdom: Exemplified in Indonesia Schools
Authors: Triastari Irfiani , Dwiningrum Siti Irene Astuti , Rahmia Sovia Husni 
Published: November 2021

Abstract
In vulnerable disaster-geographical condition in ring of fire, schools in Indonesia have conducted innovation of disaster mitigation education recent years. A disaster mitigation model in Indonesia is the use of local wisdom. Local wisdom-based disaster education aims as grand design during learning process and it supports the formation of student resilience. Therefore, to revive the value of local wisdom, it needs reinterpretation through adaptation of local knowledge and revitalization of contemporary conditions as innovations in disaster risk reduction. Through the integration of local wisdom based on disaster mitigation curriculum in the learning process, it is expected to be able to take fast, precise and accurate steps in dealing with disasters that occur in every region in Indonesia.
Assessment of potential locations for evacuation in Depok Municipality using images from UAV
Authors: Halil Amrih , Hernina Revi , Rokhmatuloh  
Published: November 2021

Abstract
This study aims to perform assessment of public facilities in Perumnas Depok Utara, Depok Municipality, Indonesia for evacuation locations using images from UAV. A UAV device, a DJI Phantom 4 was flown at 100 metres height to capture seven locations of public facilities located within Perumnas Depok Utara residential area. Raw images from DJI Phantom 4 underwent image processing and georeferencing process to generate smooth aerial images. Public facilities locations were identified from acquired images and later digitized to generate layers of assessment parameters. Each locations were scored based on rating of all criteria’s parameters. Seven criteria serve as foundation layers for evacuation assessment namely size, ownership, availability, capacity, infrastructure, transportation and safety. Study result shows that Jawa Soccer Field is the first rank of potential evacuation location while Balai Rakyat Meeting Place is the least potential evacuation location. Total area for potential evacuation locations around 43,000 m2 and can accommodate 28,961 people or equal to 60.5% of Beji Village’s population.
Community Education Model Design In Management Household Waste In Padang City
Authors: Ernawati  , Suardi Muslim , Afdhal  , Jasrio Affandri , Angraina Dilla 
Published: November 2021

Abstract
This study aims to design a community education model in waste management in the city of Padang. This type of research is qualitative research using data collection techniques, namely literature study, observation and interviews. The results showed that the paradigm of housewives regarding waste management that relies on downstream must be replaced with a new paradigm, namely waste management from upstream to downstream which covers the entire waste cycle. The obstacle in waste management is the perception of the community that waste management is the responsibility of the local government, not the responsibility of each individual. Furthermore, the sanctions given to dumping garbage in any place have not provided a deterrent effect. Therefore, based on the results of the field and literature studies carried out, obtained a community education model design based on the recycle waste management model by synergizing the government, community and company / private sector and emphasizing adult education. That is, the design of the resulting model encourages people's knowledge and self-confidence, so that it can also encourage positive change, both physically and mentally in a real, comprehensive, and sustainable manner.
The Role of Sense of Coherence and Social Capital on Perceived Risk: The Salutogenic Model Approach on Flood Survivors in Indonesia
Authors: Maulana H , Gumelar G , Irianda G 
Published: November 2021

Abstract
The study of flood risk perception has been received growing attention in multi-disciplinary research and practice. Indonesia’s government approach on managing the impact of flood is highly dependence on structural engineering solutions. Few empirical attempts have systematically established to understand whether positive psychological capacity strategy helps flood survivors to overcome the negative impact of flood. This study aims to investigate the effectiveness of salutogenic and social capital models on flood risk perception. A national survey was used to collect the data of flood survivors across Indonesia. A battery comprising socio-demographic information, measures of salutogenic variable (sense of coherence), social capital (sense of community and social trust), and individual risk perception on flood was administered to the Indonesian adult (N = 194). This study findings showed that the overall model successfully predicted the perceived risk dimensions. However, different routes of correlation across variables were identified. Discussion and future recommendation are presented with regard to the study finding.
Spatial Representation Developing Geographical awareness for Disaster Risk Reduction
Authors: Nursa’ban Muhammad , Mukminan  , Masruri Muhsinatun Siasah , Wati Iis Kurnia , Lestari Rias Murti , Hartoyo Endah Kusumastuty 
Published: November 2021

Abstract
Reducing the risk of various natural disasters makes us learn more about the meaning of safe and sustainable living space. Geographical awareness which is formed by understanding spatial representation should be owned as a capital for disaster mitigation. This study aims to describe the level of geographic awareness with the spatial representation of high school students in Yogyakarta. The study used a quantitative descriptive research design with a questionnaire technique by stratified random sampling on 180 samples of high school students in Yogyakarta. Data are presented as a percentage in tables, charts, and graphs. The results showed that the level of geographic awareness through understanding the spatial representation of high school students' disaster risk reduction varied from low to high. A high understanding of spatial representation is shown by around 30 percent of students, 50 percent in the medium category, and less than 15 percent in the low category. Three factors of geographical awareness, namely: caring, polite, responsive, and tolerant attitude towards the surrounding environment; trying to be part of the solution to environmental problems; love the homeland. All respondents agreed with geographic awareness through spatial representation as an alternative to disaster risk reduction.
The Role of Village Tourism in Environmental Education and Social Disaster Management
Authors: Saliman  , Wibowo Satriyo , Widiastuti Anik , Rosardi Raras Gistha 
Published: November 2021

Abstract
The development of the tourist village is very fast. People are aware of the need for tourism which tends to return to nature and offers a natural atmosphere. There have been many villages that have tried to develop their territory into a Tourism Village. However, this tourist village is not yet fully ready to provide for the various needs of tourists who come at any time. Some are only labeled as tourist villages, but have not maximally applied their tourism charm. The purpose of this study was to analyze the role of tourist villages in providing environmental education and social disaster management. This research uses descriptive qualitative. The use of qualitative methods is also considered because the research instrument is a human being or the researcher himself. The research location is in Grogol Sleman Tourism Village. Researchers conducted observations and interviews with village officials and the community in the tourist village of Grogol. The research subjects were determined by purposive sampling technique. Purposive sampling is a technique of taking data sources according to the special considerations of the researcher. Data collection techniques in this study using a questionnaire (questionnaire), interview (interview), observation (observation), and documentaries (secondary sources). The data analysis technique used in this study was the triangulation technique. The triangulation technique used in this study includes triangulation of methods to compare research results obtained from interviews, observations, and documentation. The results show that the development of the Grogol Tourism Village is one of the steps for entrepreneurial opportunities, environmental management and social disaster management. Grogol tourism village is an independent tourism village. Grogol tourism village initially relied on cultural potential in self-promotion. Over time, the management of the tourism village has innovated to make Grogol Tourism Village a nature-based tourism village, but without eliminating the cultural elements and local wisdom of the local community.
In vitro propagation of Vanda tricolor Lindl. var. suavis protocorm on media containing liquid organic fertilizer as a substitute for MS media
Authors: Latunra A I , Tuwo M , Rezky N 
Published: November 2021

Abstract
Vanda orchids have a high economic value in the flower industry, so it is necessary to have seeds available at all times. Tissue culture technology offers an important solution to produce plants in large numbers, but it is very costly in media preparation. Hence, it is necessary to have low-cost options for the application of planting media. One way of doing this is to substitute the composition of Murashige and Skoog (MS) media with alternative sources that are more affordable. Liquid organic fertilizer contains macro, micro, and good nutrients for the growth of explants. This study used explants from the protocorm of Vanda tricolor Lindl orchid. var. suavis aged three months planted on media containing liquid organic fertilizer, namely Nasa, Bio88, and Fortune. The parameters observed were the number of shoots and the number of leaves in each treatment. The data were analyzed using the Kruskal-Wallis test at the 5% level, and if there was an effect, it was continued with the Mann-Whitney test. The results showed that liquid organic fertilizer gave different responses to the Vanda tricolor Lindl. var. suavis protocorm. Liquid organic fertilizer has a significant effect on the number of shoots and number of leaves.