bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Lining Mechanical Behavior of Super Large Diameter Shield Tunnel during Segment Opening
Authors: Luo Ciyou , Yan Zihai , Wang Zijuan , Cui Hao 
Published: February 2022

Abstract
The mechanical behavior and risks of the lining of the super large shield tunnel during segment opening are still unclear. In order to study the characteristics of the mechanical behavior of the lining of the super-large-diameter shield tunnel during segment opening, Take the cross-passage project of Hangzhou Zhijiang Road Water Conveyance Corridor and Road Improvement Project as the engineering background. The MIDAS finite element numerical calculation model of the opening on the double-track main tunnel lining is established. The influence of the opening size and support stiffness on the mechanical behavior of the lining is analyzed separately. The main conclusions are: (1) The maximum deformation of the lining when opening occurs in the middle area directly above the opening. It is necessary to strengthen the deformation monitoring of the segment in this area during construction to prevent excessive deformation or even damage and accidents; (2) The reduction of the opening area within a certain range and the increase of the stiffness of the temporary support can reduce the deformation of the lining after the opening. Based on the determined parameters of the main tunnel lining and opening, the stiffness of the temporary support can be increased to reduce the deformation of the lining opening; (3) Setting up temporary supports and increasing the stiffness of the temporary supports cannot affect the final deformation of the lining after the temporary supports are removed. Therefore, to stabilize the lining in the open area, it is necessary to rely on pouring ring beams.
CPTU Interpretation for Silty Sand in Binh Dai Offshore Wind Farm
Authors: Wang Kuanjun , Lu Linfeng , Shen Kanmin , Xie Wei 
Published: February 2022

Abstract
Geotechnical engineering parameters are of significant effect on foundation design. In-situ tests such as piezocone penetration test (CPTU) are widely used for estimate of effective internal friction angle of sand. How to choose appropriate interpretation method for CPTU is a big problem for geotechnical design. As a case study, the laboratory test results and CPTU results of two Phases (Phase 2 and Phase 3) in Binh Dai offshore wind farm of Vietnam were analysed to establish the correlation between effective internal friction angle φ' and corrected tip resistance qt. The effective internal friction angles of the four sand layers in Binh Dai are found to be linear dependent on the soil depth. Meanwhile, linear expressions between effective internal friction angle φ' and corrected tip resistance qt are proposed, which have high quality in prediction of effective internal friction angle φ' for silty sand in Binh Dai. It worth noting that direct use of CPTU method established by other site’s data without any site specific experience would lead to misestimate at offshore wind farm in Vietnam. New correlations should be established by using site specific data cautiously.
Four-Parameter Shifts Control Chaos and Lead to Physical Behaviour in a Dual-Ring Erbium-Doped Fiber Laser
Authors: Yan Senlin 
Published: February 2022

AbstractWe study on a four-parameter shift (FPS) chaos-control method to obtain control of a chaotic dual-ring erbium-doped fiber laser and lead to physics behaviours of two laser rings. To control two chaotic laser rings, the pump parameters and gain parameters of dual-ring lasers are modulated simultaneously by four shift digital signals. It is found that controls of the two chaotic laser rings are realized and physics behaviours of two laser rings can be guided by FPS. As a result, chaos is led to two periodic behaviours. And physics movements of dual-ring lasers are guided to period-4, period-5, period-6, period-7, and some high-order-period. The obtained results have a large helpfulness for people’ study of control of dynamics system, control of chaos, optic control science, laser physics, and erbium-doped fiber laser application.
Domestic and International Mainstream BIM Software Application and Comparison Study
Authors: Wang Ying , Zhu Jiwei , Wei Baojun 
Published: February 2022

Abstract
With the rapid development of science and technology, the construction industry is showing the trend of informatization. BIM has emerged to bring vitality into the construction industry. This paper introduces the application of BIM software in various phases and the mainstream BIM software at home and abroad, and conducts a comparative study on each BIM software from the design phase, construction phase and operation and maintenance phase, analyses the advantages and disadvantages of each software, and helps relevant practitioners to quickly choose the appropriate software according to their needs.
Food flows between counties in the United States from 2007 to 2017
Authors: Karakoc Deniz Berfin , Wang Junren , Konar Megan 
Published: February 2022

Abstract
Food supply chains are essential for distributing goods from production to consumption points. These complex supply chains are important for food security and availability. Recent research has developed novel methods to estimate food flows with high spatial resolution, but we do not currently understand how fine-grained food supply chains vary in time. In this study, we use an improved version of the Food Flow Model to estimate food flows (kg) between all county pairs across all food commodity groups for the years 2007, 2012, and 2017 (which requires estimating 206.3 million links). We then determine the core counties to the US food flow networks through time with a multi-criteria decision analysis technique. Our estimates of county-to-county food flows in time are freely available with this paper and could be useful for future research, policy, and decision-making.
Climate change-related risks and adaptation potential in Central and South America during the 21st century
Authors: Hagen I , Huggel C , Ramajo L , Chacón N , Ometto J P , Postigo J C , Castellanos E J 
Published: February 2022

Abstract
Climate-related risks in Central and South America have received increased attention and concern in science and policy, but an up-to-date comprehensive review and synthesis of risks and adaptation potential is currently missing. For this paper we evaluated over 200 peer-reviewed articles and grey literature documents published since 2012. We found that climate change in Central and South America during the 21st century may increase the risk to severe levels for the following topical risk clusters: (a) Food insecurity; (b) Floods and landslides; (c) Water scarcity; (d) Epidemics of vector-borne diseases; (e) Amazon Forest biome shift; (f). Coral bleaching; (g) Coastal risks of sea level rise, storm surges and erosion; (h) Systemic failure due to cascading impacts of hazards and epidemics. Our synthesis also identified feasible adaptation measures for each risk. The impacts of the risks will be heterogeneous throughout the region, with rural communities, Indigenous peoples, Afro-Latin Americans, women, disabled people, and migrants identified as being the most severely affected. We refer to a number of adaptation options for each risk. However, unabated climate change together with low adaptive capacity will strictly limit adaptation options. Immediate strengthening of policies for building adaptive capacity and increase of research on the risk-adaptation nexus in Central and South America are paramount. Our findings might contribute to guide the adjustment and emphasis of adaptation policies and climate risk management strategies from local to national level.
Production of biogas using AnF2B reactor from cassava starch wastewater with consortium bacteria as biocatalyst
Authors: Prayitno  , Rulianah S 
Published: February 2022

Abstract
Cassava starch wastewater contains organic biodegradable (BOD, COD) with high concentrations so that it can be used as raw material for biogas through an anaerobic decomposition process. The purpose of this study was to evaluate the behavior of the continuous flow AnF2B reactor, related to the production of biogas in a variety of organic loads, from cassava starch wastewater. The AnF2B reactor has three parts of space with a total volume of 50 L, where each space contains biofilter (wasp nest-shaped) which is useful for the growth of bacterial consortium. The experiments were carried out by flowing wastewater into the AnF2B reactor continuously with organic loading of 2 g, 3 g, 4 g, and 5 g. The decomposition time was 1-10 days. The temperature in the reactor was maintained at 37 - 39 C and pH: 6.5 - 8. The results showed that biogas production was influenced by the organic load of wastewater, where the maximum biogas production of 6.926 L was obtained at an organic load of 5 g of COD and a biodegradation time of 3 days. The biogas produced contains CH4 (85%), CO2 (14.5%), and CO (0.5%).
Utilization of HVS paper waste with collage art and paper quilling techniques as a 2-dimensional medium for hair styling in beauty education program
Authors: Widowati T , Marwiyah  , Apriyani D , Achmadi T A , Wahyuni I E , Pangastuti N W , Dewani F S H 
Published: February 2022

Abstract
The accumulation of paper waste encourages the utilization of HVS paper waste with Collage and Paper Quilling Techniques as a 2-dimensional medium for hair styling learning. The purpose of this study was to understand the process of utilizing HVS paper waste with collage and paper quilling techniques as a 2-dimensional medium for hair styling learning; to explore the design and shape produced in the utilization of HVS paper waste with collage and paper quilling techniques as a 2-dimensional medium for hair styling learning; to learn the validity of 2-Dimensional media for Hair Styling Learning by utilizing HVS Paper Waste using Collage and Paper Quilling Techniques. Development research with qualitative descriptive data analysis was carried out, the process of utilizing HVS paper waste with collage and paper quilling techniques using loose scrolls and multi strips scrolls was explored. Design and shape of hair styling for 5 face shapes. Validity by 5 experts with an average of 89.33% and, the results of final product assessment by 60 students obtained an average of 92.70% based on indicators of aspects of regulation, balance, color, conformity, attractiveness. Utilization of HVS paper waste with Collage and Paper Quilling Techniques as a 2-dimensional medium for hair styling learning is declared very feasible.
Physicochemical and photodegradation characteristics of hematite-biochar nanocomposite prepared from bamboo sawdust
Authors: Astuti W , Musfiroh R , Yahya A A , Sulistyaningsih T , Rusiyanto  
Published: February 2022

Abstract
This work implicates the synthesis of biochar-hematite nanocomposite from bamboo sawdust and its photodegradation characteristic for remazol brilliant blue. The nanocomposite was prepared through a one-step pyrolysis process in a tubular furnace under a flow of nitrogen and impregnation using FeSO4.7H2O and FeCl3.6H2O. The physicochemical properties were characterized by x-ray diffraction and Fourier transform infrared spectroscopy, which confirmed that hematite was successfully identified on the surface of the nanocomposite. The results also show that the nanocomposite is suitable for photodegradation application. The decolorization of remazol brilliant blue is suitable with the Langmuir isotherm model and pseudo-second-order kinetic model. At pH = 1, initial concentration = 200 mg/L, contact time = 60 minute and nanocomposite dosage 0.4 g/L, the decolorization efficiency reached 96.9%.
Collagen face spray: facial moisturizer from chicken egg shell membrane to prevent premature aging
Authors: Agustin E W , Tassabila D E C , Nisa Z A , Rizqi I K , Safitri E N , Sulistiyowati M I 
Published: February 2022

Abstract
Skin is often exposed to various factors, so the premature aging process become one of the public’s concerns. One of the efforts to maintain skin beauty and prevent premature aging is to fulfil the intake of collagen in the skin. Collagen is a protein, which one is found at chicken egg shells membrane. So far, chicken egg shells are only seen as waste, pollute the environment and are not used properly. Therefore, this innovation to making face spray cosmetic products appears to be a new breakthrough in the utilization and waste treatment. It can function to moisturize and nourish the skin, soothe facial skin, anti-aging, relieves redness on sensitive skin and can give a smooth impression on makeup. The method used in this research is an experiment, the results based on anatomical pathology tests using microscopic 400x magnification with Sirius red staining obtained 52.8% collagen content in egg shell membrane, and pH test obtained value of pH 5.4 which meets the requirements for the safe value for the skin pH 4.5-6.5 and the results of the organoleptic test on collagen face spray product are odorless, colorless, and the material is in the form of a liquid face spray cosmetic.
Challenges and possibilities of implementing sustainable palm oil industry in Indonesia
Authors: Sylvia N , Rinaldi W , Muslim A , Husin H , Yunardi  
Published: February 2022

Abstract
Indonesia has emerged into the largest palm oil-producing nation in just a few decades, leaving Malaysia behind. Undeniably, palm oil has substantially contributed to the country’s economic development. Nonetheless, it comes with refutation for deforestation, environmental degradation, and social tensions, are also evident. The palm oil industry has been recognized as one of the major producers of greenhouse gases, including CO2. The Government of Indonesia (GOI) is committed to maintaining the palm oil industry, despite the strain of the European Union, as millions of workers depend on these industries for their livelihoods. The GOI requests that each palm oil firm pursue the Indonesian Sustainable Palm Oil (ISPO) certification regarding the adverse impacts. Around 20% of the country’s entire palm oil industry has received an ISPO certificate. By 2023, all palm oil companies must be ISPO accredited, as this regulation is compulsory. By reducing CO2 and other greenhouse gasses, implementing all the ISPO guidelines in the palm oil industry will support the industry and protect the environment. This paper will review the implementation of sustainable Indonesia’s palm oil industry under the current situation, corresponding with ISPO and RSPO (Roundtable Sustainable Palm Oil).
Metal adsorption of Pb and Fe in refillable drinking water in Semarang City using Powdered Activated Carbon (PAC) based on coconut shell and ozonation technology
Authors: Pradnya I N , Verren L N , Permana J A 
Published: February 2022

Abstract
Drinking Water Refilling Depot (DAMIU) is one of the most common sources of drinking water. Drinking water quality standards have been regulated in PERMENKES No. 492 Year 2010 concerning Drinking Water Requirements. Drinking water samples were taken at two DAMIU, which using a reverse osmosis process, located in Semarang. The sample contained metal contents (Pb and Fe) that exceeded the quality standards. The Pb metal content ranged from 0,17-0,18 mg/L with a quality standard of 0,01 mg/L and Fe metal content ranged from 0,43-0,48 mg/L with a quality standard of 0,3 mg/L. In this study, to reduce the levels of Pb and Fe metals are using adsorption and ozonation technology. Adsorption was carried out using powdered activated carbon from coconut shell with a particle size of 100 mesh, variations of dose used were 2, 3, 4, and 5 g. The variation of adsorption and ozonation contact time were 20, 40, and 60 minutes. The highest adsorption method efficiency with a 2 g dose and a 60 minutes time, with Pb and Fe levels are 97,2% and 97,0%, respectively. Meanwhile, the highest ozone efficiency was at 60 minutes with Pb and Fe levels of 90,7% and 92,3% respectively.
Face mask detection services of Covid19 monitoring system to maintain a safe environment using deep learning method
Authors: Djuniadi  , Iksan N , Hastawan A F , Suni A F , Firdaus A A , Hidayati L , Setiawan D K , Udayanti E D , Prasetyanto F 
Published: February 2022

Abstract
COVID19 has become one of the pandemic diseases that hit the world, including in Indonesia. Efforts to prevent the spread of this virus have been carried out, including by implementing health protocols, provide information services for the spread of the virus and emergency response, detection services for people suspected and infected with the virus and programs for preventing the spread of the virus and vaccination for all elements of society in Indonesia. This research focuses on the development of face mask detection system to detect the use of mask by people using deep learning method that focuses more on object detection. Face masked detection systems can be used to assist in monitoring compliance with the use of masks in public areas that have the potential to cause crowds so as to create a safe environment. The use of the Deep Learning method through the MobileNets V2 architecture was quite effective and gives an accuracy result in testing the classification training data of 0.99 at 10 epochs and has also been implemented in real-time direct testing.
Physical comparison of parijoto fruit from hydroponic farming with parijoto fruit from natural plantations
Authors: Ansori M , Putri M F , Widayani S , Karnowo  , Lestari N H , Eryanti C D , Izzah A M , Natalia L 
Published: February 2022

Abstract
One of the advantages of hydroponic systems is that plants can be cultivated under controlled environmental conditions. The parijoto fruit plant has also been successfully cultivated with a bucket hydroponic system. This fruit has been shown to have a high antioxidant capacity. In this study wanted to compare the physical characteristics of parijoto fruit grown with hydroponic farming, with parijoto fruit obtained from the garden naturally. The method used in this study is to buy the seeds of the parijoto plant. It later developed it in the hydroponic farming, Dutch Bucket System, DFT (Deep Flow Technique). After the plant is fruited and ripe, parijoto fruit is picked and subjected to physical testing. Similar tests were imposed on samples of parijoto fruit obtained from natural plantations. The results of the test are further compared. Based on physical testing data obtained the conclusion that the diameter of parijoto fruit produced by hydroponic agriculture has a smaller diameter than the diameter of parijoto fruit produced by natural plantations. Lighter fruit weight, almost the same purple color, have the same moisture content, the same sugar content, higher pH value, as well as lower mineral levels.
Identification of microwave heating system with symmetrical octagonal tube cavity using ARX model
Authors: Prastiyanto D , Apriaskar E , Handayani P A , Destanto R , Malik M A , Ramadhan A E 
Published: February 2022

Abstract
As one of the complex technologies in the heating process, microwave heating system has gained attentions in the recent years. A further development of microwave heating control technology becomes necessary considering its superiorities in less energy consumption, volumetric heating ability and satisfying mechanical properties. Several studies on microwave heating system modelling were conducted to encourage the controller design. This work presents the modelling of a microwave heating system using autoregressive with exogenous variables or so-called ARX. The modelling conducted in this research applied the approach of input-output identification method. The generation of input-output datasets for the identification of microwave heating system was carried out in COMSOL simulation environment using symmetrical octagonal tube cavity design with two magnetrons as the inputs and five temperature sensors as the output measurement devices. For the validation and evaluation of the approach, MATLAB identification system toolbox was utilized to find the best ARX model based on the given input-output datasets. The validation test shows that the best ARX model can reach more than 93% in the fit value given all the datasets for all the outputs, while for the evaluation using the perturbed signals from the outside of datasets, the chosen model can obtain 97.35% in the average of the fit value for all the outputs.
Simulation study of Al2O3-H2O nanofluids as radiator coolant using computational fluid dynamics method
Authors: Anis S , Kayunda Y C , Kusumastuti A , Simanjutak J P 
Published: February 2022

Abstract
The objective of this study was to investigate the influence of nanofluid concentration on the heat transfer rate of radiator pipes. This study used computational fluid dynamics simulation method of ANSYS Fluid Flow Fluent software. The working fluid used in this study was nanofluid prepared of Al2O3 and H2O mixture. Simulation was performed at various Al2O3 nanoparticles concentration ranging from 0 to 1%. The velocity and inlet temperature of nanofluid were set at 0.4 m/s and 130°C, respectively. The results of the simulation showed that the heat transfer rate and outlet temperature of nanofluid were influenced by the nanoparticles concentration. The rate of heat transfer increased with the increased of nanoparticles concentration. Among the tested concentration, 1% Al2O3 provided better heat transfer activity in which it is capable to reduce the high inlet fluid temperature to become about 80°C, very close to the recommended working conditions.
Design of a solar power plant system for micro, small, medium enterprise uses PVSyst 7.1 as a renewable energy alternative source in remote areas
Authors: Windarta J , Handoko S , Sukmadi T , Nafadinanto K , Muqtasida S , Halim C 
Published: February 2022

Abstract
PLN electricity distribution goal for remote areas is not achieved yet so that alternative sources are needed, for instance, solar power plants. The purpose of this study is to design and analyze the solar power plant potential with an off-grid system that is used to supply SME electricity in electrical and economic terms. The daily load data profile used by SME is 1.8 kWh. This study uses PVSyst 7.0 software as design tool simulation system and RETscreen software as an economic analysis tool simulation. The result of this solar power plant system design requires a 700Wp solar module, 24V 160Ah battery, 24V 1000W inverter, and SCC 30A. With the planned system design, the electrical energy generated in the PVSyst simulation in one day is estimated to reach 2 kWh with the use of 50% Deep of Discharge battery capacity considering the length of battery life span. To return the investment cost of this solar power plant system, PLN electricity cost needed is Rp 2,664.