bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of the Attachment Process of Bionic Spines Based on the Coupling of Discrete Elements and Multi-body Dynamics
Authors: Liu Ran , Li Yu Xin , Luo Haitao , Yu Miao 
Published: November 2022

Abstract
As the only natural satellite of the Earth, the Moon has profound significance for deep space research, and the undifferentiated lunar rock core plays a key role in the investigation of the origin of the Moon. In recent years, there have been numerous deep space sampling techniques, but all of them are at the cost of destroying the sample, while drilling can retain the sample in its original state to the maximum extent. In this paper, based on the reference of the claw spine attachment device at home and abroad, the theoretical modeling of the claw spine piece which plays the role of grasping and attaching is carried out, and the simulation analysis is carried out by the coupling method of discrete element and multi-body dynamics, which provides important guidance for the subsequent experi-ments and the optimized design.
Application of LiDAR Survey Technology in Space Launch Sites
Authors: Ren Zhenzhen , Wang Qiang , Wang Yuchao , Wu Gaoyang , Wang Kang , Zhong Wen'an 
Published: November 2022

Abstract
LiDAR has the advantages of small size, high imaging accuracy, high resolution, all-day survey, and strong adaptability to complex environments. With the continuous improvement of technical performance, LiDAR is widely used in aerospace, mapping, military, and civil fields. In this study, the principle of LiDAR survey technology was introduced, and the key technology and application method of using LiDAR to measure the initial section of rocket launch were discussed in detail; a LiDAR survey system was designed on this basis. Afterward, the feasibility and rationality of the survey system and survey method were verified by rocket launch tests. The results show that compared with the traditional survey methods, LiDAR survey technology has obvious advantages in terms of survey accuracy, automation, and real-time visualization of survey data, and it can greatly reduce labor intensity and improves work efficiency, which provides an important reference for the design and application mode of LiDAR survey system in space launch sites.
Research on modular scheme of aviation emergency rescue for natural disasters
Authors: Li Yueyue , Liu Zhenlei , Chen Keyu , Qi Ji , Li Chuang 
Published: November 2022

Abstract
Aviation emergency rescue is the core part of China's emergency rescue system and the main rescue force, which plays an important role in disaster relief, rescue materials transfer, casualty transportation, air rescue, major health and epidemic prevention. Based on H145 helicopter, the modular design concept is adopted to redesign the aviation rescue equipment, and the modular structure layout of the cabin is completed for major natural disasters. Aiming at the path planning problem of rescue helicopter, based on the improved ant colony algorithm, the optimal path planning of helicopter is completed by comprehensively considering the constraints of helicopter flight performance and flight environment. Through the use of medical data interaction technology, a standardized transport information service platform is established, which solves the problem of medical information island between the transfer unit, the transport unit and the evacuation hospital when the helicopter performs the aviation emergency rescue task, realizes the interconnection of medical data, effectively shortens the response time of aviation emergency rescue and improves the rescue efficiency.
Bidirectional coupling method for solving the electromagnetic-joule thermal properties of electromagnetic launcher
Authors: Zhang Pengxiang , Shu Tao 
Published: November 2022

Abstract
The actual working process of the electromagnetic launcher is very complex, and using simulation software to solve it is the main method of research at this stage. The one-way coupling method will ignore the temperature-dependent characteristics of the material. In order to better simulate the actual working process, this paper uses the bidirectional coupling simulation method to solve the electromagnetic force and Joule heat of the four-rail electromagnetic launcher, and compares it with the unidirectional coupling. The simulation results show that the bidirectional coupling is more accurate than the unidirectional coupling, and the increase of the number of iterations will improve the solution accuracy, but affect the solution speed.
The Bricard Linkage Network Constructed by Bennett Linkage: Design Method and Kinematic Analysis
Authors: Huang Ziyi , Jiang Wentao , Pan Xuan , Tao Zekai 
Published: November 2022

Abstract
The paper focuses on a Bricard Linkage network constructed by Bennett Linkage and discusses the possibility of connecting Bricard linkage using Bennett linkage as the connection. To simplify the problem, accessible geometric parameters are set without much loss of generality. This new design can also evolve into some new mechanisms by connecting the linkages in different ways. Based on the designed connection idea, the corresponding three-dimensional model is created by Onshape. Using Onshape, the movement and deployment of each mechanism could be observed. Then the kinematic analysis is carried out with Adams software, to find out how the kinematic angles vary as time increases. A physical model is made to observe the deployment process more clearly, indicating a potential application of a retractable table. Since the problem has been simplified by setting accessible parameters, the mechanism may show some further performance worthy of being explored if the parameters are more complicated.
A mission planning method for sunlight avoidance period of GEO optical remote sensing satellite
Authors: Shi Xiaoxia , Li Xindong , Wang Yu 
Published: November 2022

Abstract
GEO optical remote sensing satellites need to avoid sunlight entering the camera optical system at midnight hours. For the existing evasion methods such as thermal doors and posture planning, nearly 15% of the satellite in-orbit life cannot be reasonably utilized due to the passive evasion methods. To solve this problem, a method based on mission planning is proposed. When evasion begins, the satellite changes the orbital coordinate system into the inertial coordinate system and maintains the safe attitude in inertial space. If space missions are planned such as camera calibrations and celestial bodies observations, the algorithm can determine the compliance of the missions with attitude constraints and energy constraints, and the eligible missions are executed. When evasion ends, the satellite maneuvers toward the Earth proceeding with Earth observation missions. The mathematical simulation indicates the method is feasible, ensuring the safety of the optical camera and executing the space missions meanwhile. The mission planning method extends relatively the service life of the satellite and makes the expansion of the space observation field possible.
Simulation research on positioning acquisition of field rescue equipment based on LoRa
Authors: Kou Pengfei , Chen Mingyao , Wang Fei 
Published: November 2022

Abstract
Timely and accurate acquisition of the position information of people in distress in the field is an important prerequisite for successful rescue. This paper analyzed the main positioning means of the current call equipment and the research status of LoRa technology in the position information acquisition of the current call equipment. The author proposed a method to obtain the position information of field rescue equipment based on LoRa, and simulated it in NS3 network simulator. This scheme can meet the requirements of high positioning accuracy, long communication distance and long standby time of field rescue equipment, and has high value on practical application.
Research on Common Mode Analysis Method in System Safety Analysis
Authors: Li Dawei , Gao Jianguo , Zhang Zhongyuan , Xu Jihui 
Published: November 2022

Abstract
In system safety analysis, the existence of Common Mode Failure (CMF) greatly undermines the independence of components and poses great threat to safety of the system. In Common Mode Analysis (CMA), whether CMF needs to be considered for basic events under different types of logic gates in Fault Tree, it lacks strict reasoning and comprehensive consideration. This paper takes CMF of the same and different levels under "AND gate" and "OR gate" in fault tree as an example, and uses reasoning analysis and mathematical calculation methods to compare the influence of the existence of CMF on failure rate of the system. The results show that whether CMF need to be considered for the component depends on the type of logic gate correspond to the higher-level component. The research results have certain reference value for the analysis of CMF in CMA.
Research on Road Extraction Algorithm Based on Improved Otsu’s Thresholding Method
Authors: Wang Yanmei , Lu Mingyu , Feng Pengfei 
Published: November 2022

Abstract
In this paper, the widely used method of Otsu's thresholding method is studied. On the basis of the traditional Otsu's thresholding method, according to the distribution characteristics of the target and background in the actual image, a new method based on traditional Otsu's thresholding method is presented.and the road extraction experiment is carried out with GF-2 remote sensing image.The experimental results show that the improved method has the advantages of high segmentation accuracy and strong anti noise ability compared with the traditional Otsu's thresholding method.
Cleanliness assessment of Lake Toba tourist attractions from stakeholders’ perspective
Authors: Khair H , Utami R , Lordye G , Sari U , Pasaribu E 
Published: November 2022

Abstract
Lake Toba area is one of the priorities for developing tourist destinations in Indonesia. As a strategic national tourism area, it is necessary to identify aspects of the tourism area development that are not yet optimal to increase the number of tourist visits to that location. This study aims to assess the cleanliness of tourist sites in Lake Toba based on the assessment of tourism site stakeholders, namely visitors, local businesses, and cleanliness managers. The tourist sites in Lake Toba studied were Pasir Putih and Bukit Holbung. This study found that Pasir Putih and Bukit Holbung were considered dirty, with a cleanliness index of 2.63 and 2.60. The assessment shows that access to the cleaning facilities in the two tourist sites is difficult to reach. However, regarding the completeness of the cleaning facilities, Pasir Putih is considered better with an average index of 2.94 compared to the cleaning facilities in Bukit Holbung, which are considered inadequate with an average index of 2.43. The number of tourists visiting a tourist site is directly proportional to the waste generated, and the habits of tourists who visit also affect the cleanliness of a tourist site.
Review of the Circular Economy of Plastic Waste in Various Countries and Potential Applications in Indonesia
Authors: Murti Z , Dharmawan  , Siswanto  , Soedjati D , Barkah A , Rahardjo P 
Published: November 2022

Abstract
One of the main environmental problems faced by the world, including Indonesia, is plastic waste. Plastic waste has polluted the soil, rivers, and the sea. The nature of plastic that is not easily biodegradable, takes hundreds of years to decompose naturally. Plastic waste management which is believed to be effective, in addition to efforts to reduce use is by recycling plastic waste. In many countries, recycling plastic waste has led to a circular economy. This circular system allows plastic waste to be recycled into new products. In fact, this concept is claimed to be able to encourage environmentally friendly economic growth. This study uses a literature study to identify the application of a circular economy of plastic waste in various countries. As a result, 21 papers were collected and analyzed based on year of publication, geographical location and research methodology. Furthermore, this study highlights the obstacles faced by many countries towards a circular economy followed by a comparison of their plastic waste recycling rate achievements. This research also discusses the state of plastic waste management and the potential for adoption of circular economy best practices in Indonesia.
Dynamic Availability Assessment Using Dynamic Evidential Network: Water Deluge System Case Study
Authors: Bougofa Mohammed , Bouafia Abderraouf , Chakhrit Ammar , Guetarni I H M , Baziz Amin , Aberkane Salah , Zerouali Bilal , Kharzi Rabeh , Bellaouar Ahmed 
Published: November 2022

Abstract
Probabilistic modeling is widespread in engineering practices, mainly to evaluate the safety, risk analysis, and reliability of complex systems. However, insufficient data makes it difficult to estimate the state probability of components or the global system in dynamic complex systems. Furthermore, conventional methods for dependability analysis typically have little capacity to cope with dependence, failure behavior, epistemic uncertainty, and common cause failure simultaneously. This paper presents the application of an extended discrete-time dynamic evidential network (DEN) model to assess the availability of complex systems. The model application combines Dempster-Shafer's theory to treat epistemic uncertainty over a new state-space reconstruction of components and the dynamic Bayesian network to present multi-state system dependability. This model is demonstrated in a real case study of a water deluge system installed as a safety barrier from Algeria's oil and gas plant. The results show the significant influence of these factors on the system's availability. The goal of this modeling is to assure the high availability of a safety barrier in a volatile setting by providing a decision-making tool to prioritize maintenance tasks, preventing the failure of complicated redundant systems, and recommending alterations to the design.
Stability Evaluation of Bener Dam Diversion Tunnel During Construction
Authors: Danuartha MSH , Sadono K W , Putranto T T 
Published: November 2022

Abstract
Bener Dam Diversion Tunnel is located in two rock units such as andesite and andesite breccia. Based on the engineering geology investigation, the subsurface tunnel will penetrate andesite breccia with good rock mass quality (fresh-moderately weathered), while surrounding the tunnel consist of andesite breccias with moderate and poor rock mass quality. Geological and engineering geology conditions are used as the basis for stability analysis of excavation methods and determining primary tunnel support systems. Geological Strength Index is used for determining rock mass parameters. The stability analysis of the openings and tunnel supports was carried out using an empirical and numerical method approach. The results of the empirical analysis of support system stability were then evaluated using the finite element method. The most suitable excavation method is applied by blasting. Evaluation of the support system based on rock mass rating with the finite element method modeling shows that the lowest safety score in the tunnel geomechanical zone is in zone 2 with a safety factor value at the final support is 1.786, however in general they are in a good condition which are safe from the initial excavation until the installation of supports stage.
Bibliometric Analysis of Thermal Comfort and Sleep Quality Research Trends in Indonesia
Authors: Budiawan Wiwik , Tsuzuki Kazuyo , Prastawa Heru 
Published: November 2022

Abstract
Using a bibliometric analysis of the publication output associated with research on thermal comfort and sleep quality in Indonesia during the ten-year period 2012-2022, the purpose of this study was to describe current trends and future research areas. The database Scopus was queried for information covering the years 2012 to 2022. We analyzed selected documents containing “thermal comfort,” “Indonesia,” and “sleep quality” as part of the title, abstract, or key words and reported the following parameters: publication output trends, cooccurrence, author institution, author key words, and index key words. We utilized Visualization of Similarities (VOS) viewer to analyze the files of a bibliographic database in which five co-occurrences occurred. Air conditioning, ventilation, and the tropics accounted for three main cluster of thermal comfort in Indonesia. Meanwhile, in the sleep quality, the main cluster consisted of human, adult, and major clinical study. This study provides a bibliometric analysis demonstrating that, over the past 26 years, the annual number of publications pertaining to sleep quality in Indonesia has increased at a significantly faster rate than literature on thermal comfort. The latest keywords (trend) of thermal comfort are energy efficiency, temperature effect, and field measurement. In the sleep quality topic, the latest keywords are pandemic, controlled study, and Pittsburgh Sleep Quality Index (PSQI).
Application of anaerobic and aerobic bioreactors in detergent wastewater treatment: A review
Authors: Baihaqi Rifqi Ahmad , Prabahandari Kencana Ayudya , Hariyono Yogi , Pratiwi Novita Indah , Sutanto Heri , Wahyono Yoyon 
Published: November 2022

Abstract
The laundry business sector is expanding quickly nowadays. However, the laundry industry is still dealing with the issue of processing detergent wastewater. Anaerobic and aerobic bioreactors may efficiently solve this problem. This narrative review aims to assess the feasibility of using anaerobic and aerobic bioreactors for detergent wastewater treatment. Its advantages and disadvantages and the idea of combining multi-media filtration and UV light in detergent wastewater treatment using an aerobic and aerobic bioreactor. The anaerobic bioreactor can reduce chemical and biological oxygen demand to 89.8 % and 94.0 %, respectively. At the same time, aerobic bioreactors can reduce chemical and biological oxygen demand to 99.1% and 71%, respectively. However, some challenges still need to be addressed to make anaerobic ad aerobic bioreactors can be implemented. Suspended solid production, dissolved methane, and temperature-dependent effectiveness are challenges that must be solved. Multi-media filtration can reduce suspended solids and provide ion exchange, while UV light kills excess microorganisms from the bioreactor.
Improving quality of COD analysis using AgNO3 for wastewater samples with high chloride content
Authors: Pertiwi T S , Purwanti T , Widagdo N 
Published: November 2022

Abstract
Chemical oxygen demand, or COD, is one of the important environmental parameters that provides the extent of pollution in the water bodies. Valid analysis of COD is needed as a basis to evaluate the condition of water bodies or a wastewater plant. Therefore, any potential deviations suspected during analysis are required to be thoroughly investigated. The problems generally found for COD analyzes came from interferences and contaminations. One challenge that the Badak LNG’s Laboratory had, was the wastewater interferences from inorganic substance. It was reflected from the results of COD analyses which prevented to deliver accurate and reliable results for high chloride wastewater samples. It is also mentioned on the Standard Method that high chloride ions (> 2000 mg/L) on wastewater can cause problems on COD determination. Further evaluations are conducted to ensure whether pre-treatment with the addition of specific compounds can compensate the interferences. On this opportunity, mercuric sulfate and silver nitrate are evaluated to determine whether they deliver effective measures to remove the chloride interference and provide valid and accurate results. Later, it was silver nitrate that had more capability to remove chloride interference with additional benefits, less cost and less hazardous wastes generated.
The Efficiency of Reducing COD and Turbidity of Tofu Wastewater using A Combination of Electrocoagulation and Ozone
Authors: Oktiawan Wiharyanto , Samadikun Budi Prasetyo , Ashari Afan Sulton , Purwono Purwono 
Published: November 2022

Abstract
We present an investigation of tofu wastewater that contains organic substances that can cause rapid microbial growth in the water. It can lead to a decrease in oxygen levels. In addition, tofu wastewater also contains suspended substances that cause turbidity. This study aims to evaluate changes in pH, temperature, and efficiency of reducing turbidity & chemical oxygen demand (COD) of tofu wastewater using a combination of electrocoagulation and ozone. This research method was carried out on a laboratory scale using tofu wastewater. The ozone generator is used for ozonising tofu wastewater and an acrylic batch type electrochemical reactor. The electrode material used for the anode and cathode is made of aluminum and iron sheets. There were also differences in the highest turbidity removal of 78.3% at the 60
th
min when the wastewater was treated using a combination of electrocoagulation followed by ozone. The highest COD removal of 51.9% resulted from the treatment of tofu wastewater using ozone for 60 min. The initial temperature was 27.6°C then increased by 28.1°C (1.8%). Combination of electrocoagulation followed by ozone was more effective in reducing pollutants in tofu wastewater.
Planning for the 3R-based waste processing site in Aimas District, Sorong Regency
Authors: Poedjiastoeti Hermin , Syahputra Benny 
Published: November 2022

Abstract
A design prototype will be created as part of this research project for the 3R-based Waste Processing Site (TPS 3R) in the Aimas District. The design carried out refers to the Minister of Public Works No. 03 of 2013 concerning the Implementation of Waste Facilities and Infrastructure and Technical Guidelines for 3R-based Waste Management by the Director General of Human Settlements in 2021. According to the study’s findings, the average quantity of waste produced daily in the Aimas District was 1.69 liters per person, or 40.87 m3 per day, with a composition of 38.13 % organic waste, 30.13 % recyclable inorganic waste, and 31.75 % inorganic waste that cannot be recycled. The 3R-based Waste Processing Site building is expected to require an area of 237.75 m2, made up of a room for managing organic waste of 129.75 m2 with composting techniques using seven bamboo aerators, a room for managing plastic waste of 29.50 m2, a space for managing inorganic waste of 6.25 m2, and supporting buildings covering an area of 72.25 m2. At the 3R-based Waste Processing Site, processing is divided into five series: waste collecting, waste sorting, organic waste recycling, inorganic waste recycling, and residue recycling.