bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of High Entropy Alloy (HEA) as Catalyst for Azo Dye Degradation in Fenton Process
Authors: Hassan Nur Hudawiyah Abu , Natsir Nisa Syukrina Mat , Rahman Siti Noramira Ab , Daud Farah Diana Mohd , Jamal Nur Ayuni , Ibrahim NorFadhilah , Nordin Norhuda Hidayah 
Published: December 2021

Abstract
Azo dye is widely used in the textile industry since it is cost effective and simple to use. However, it becomes a continuous source of environmental pollution due to its carcinogenicity and toxicity. Various methods had been used to remove the azo dye in solution. One of the famous and repeatedly used is Fenton process. The Fenton’s process is one of the advanced oxidation process where iron catalysed hydrogen peroxide to generate hydroxyl radical. Treating azo dyes in solution requires a catalyst to enhance the process of degradation. Herein, high entropy alloy (HEA) has been proposed as a catalytic material to enhance the performance of Fenton process for azo dye degradation. HEA has been reported as a promising catalyst due to its high surface area. The higher the number of active sites, the higher the rate of azo dye degradation as more active sites are available for adsorption of azo dyes. The results have shown that HEA can be used as a catalyst to fasten the Fenton’s reaction since the degradation time is proven to be shorter in the presence of HEA. The method derived from the result of this study will contribute in treating azo dyes for wastewater management in Fenton process.
Monitoring of Stiffness Estimation for Tomato During Storage Period
Authors: Hashim M K R , Uda M N A , Mohd Sabri Muhammad Adi Yusri , Hashim U , Afnan Uda M N 
Published: December 2021

Abstract
The quality assessment through stiffness or firmness is widely used to identify the maturity of fruits and vegetables. Most of assessment method are destructive and no cost effective. This study was done to develop a stiffness estimation for tomato during storage period by using acoustics method. This project involved the usage of modern tools such as Arduino and LabVIEW where both of them were used to controls and regulate the data collected from a buzzer that produced sinusoidal sound wave. The time taken for the sound wave to reach the microphone were recorded as it was considered as the important factor in determining the stiffness factor, S, alongside the changing mass and diameter of the tomato during its storage period. At the end of the project, it was shown that the stiffness value of the tomato decreases in hand as the day progress. Furthermore, the correlation of the parameters was also calculated in which R2 value between stiffness and weight was finalized at 0.8993, with equation of y = 379.45 × – 40.321. The findings had successfully proved that the parameters involved in the research are greatly related.
Development of a device for multiplying numbers by means of FPGA
Authors: Berezin N M , Chernetskaya I E , Panishchev V S , Shabarov A M 
Published: December 2021

Abstract
The authors propose the description of the development of a device for multiplying numbers. The device for multiplying numbers on the field-programmable gate array (FPGA) includes two input and one output registers, fifty-six single-digit adders, sixty four logic elements AND, one exclusive OR gate. The main scientific and technical task in developing a device for multiplying numbers is to reduce hardware complexity using single-bit adders and logic elements. Introduction includes description of works of scientists and researchers whose publications are devoted to design and development of multiplier construction methods, multiplier FIR performance improvement by right-shift and addition method on FPGA (field-programmable gate array) basis. The implementation of MAC-block, hardware implementation of binary multiplier on the basis of multi operand adder, multiplier design by right-sliding and addition with control automaton in the FPGA basis is the actual research tasks presented in a number of papers. The description of features of multiplier implementation, high-speed multipliers with variable bit rate, studies of approaches for designing modular multipliers, FPGA image processing using Brown multiplier for performing convolution operation find application in problems of performance and speed. Also, a number of authors describe implementation of conveyorization method, design of dual multiplier, construction method of 8-bit multiplier with reduced delay, 8-bit high-density systolic multiplier arrays on FPGA and development of high-performance 8-bit multiplier using McCMOS technology. A fragment of a developed device for multiplying numbers is presented in the work by the authors. The principle of operation of a device for multiplication is described. The description of connected elements of the device is given. The timing diagrams of operation of a device for multiplication of numbers are presented.
Development of a machine vision system for recording experimental data in the study of torsional stiffness by dynamic mechanical analysis
Authors: Gryaznov A S , Prugov S S , Plotnikov V A 
Published: December 2021

Abstract
A machine vision system has been developed for recording data obtained on an experimental installation for studying relaxation transitions of polymers, as well as studying the dynamic shear modulus during phase transformations in alloys based on titanium nickelide. The computer vision system is based on simple algorithms implemented in the Java language in the IDE “Processing”. The conditions for the experiment and the procedure for processing the experimental data obtained on the basis of the machine vision system are determined.
Computational studies of hydrotoparaffin plugs in wells
Authors: Izmaylova G R 
Published: December 2021

Abstract
In Western Siberia and the Far North, complications caused by paraffin plugs in wells are not temporary. They are caused by ongoing factors, such as permafrost zones, a sharp temperature drop along the well, the high gas factor and water in the well products. The paper studies the possibility of using a high-frequency electromagnetic field to remove paraffin plugs inside the well. Mathematical modeling of the problem using a system of heat and mass transfer equations and boundary and initial conditions is described. The phase transition (melting of hydratoparaffin) is denoted by Stefan’s condition which is one of the boundary conditions. The problem does not have an analytical solution, so the numerical implementation of the solution is carried out. Graphs of dependences of melting limits on generator power, and distribution of temperature fields in wells are constructed.
Arduino-based automated system for determining water flow consumption in open flow
Authors: Koshoeva B B , Mikheeva N I , Mikheev D I , Bakalova A T 
Published: December 2021

Abstract
The article provides an overview of modern methods and devices for measuring water flow in open channels and natural watercourses, reflects the shortcomings and errors in their application. Considered the possibility of using the Arduino element base for creating an automated system for metering water consumption in an open stream and sending data via a Bluetooth module. Has been investigated the eventuality of using the pipe sensor YF-S201 for measuring the flow rate of liquid, in conjunction with the ultrasonic sensor of distance HC-SR04 for determining the level of water in the flow. The results of the experiment carried out on the basis of the laboratory stand “Hydraulic structures” in KSTU are presented. There were performed processing of the measurement results on the basis of the Arduino UNO board and a laptop, as well as remote data transmission and their visualization on a smartphone. The absolute and relative errors of the proposed system have been calculated.
Information modeling in the context of highways property complex management
Authors: Kostesha V A , Shapovalov D A , Kolesnikova I K , Biryukov D A , Chetverikova A A 
Published: December 2021

Abstract
This article reveals the topic of the implementation of information modeling in the legislation of the Russian Federation. The world experience of creating information models of capital construction and the main features of control and standardization of BIM formation are considered. The analysis of the existing legal framework is carried out in relation to the responsibilities of organizations for the formation and maintenance of information models. The scheme of the life cycle of the model was developed. The article is related to the field of highways property complex management. The main features of the formation of BIM roads, their systematization, storage and regular updating were identified. As a result of the study, a geoportal of highways was developed for the modernization of the land and property complex management of highways. It serves as the basis for geoinformation support for information modeling, cadastral, urban planning, inventory and other works on highways. Conclusions and recommendations for the further development of this area in the territory of the Russian Federation are presented.
Computer-aided study of the impedance dispersion of biological tissues
Authors: Malikov V N , Tihonsky N D , Kozlova V N , Ishkov A V 
Published: December 2021

Abstract
The article considers the development of a software and hardware system to study the impedance dispersion of biological fluids and tissues using an alternating signal generated and received by SensorDaq and LabView software. The design and development of the impedance measurement software and hardware system are described in detail. The impedance and capacitance values of the biological object were obtained when scanning at various frequencies and temperatures corresponding to different object conditions. The results of the system testing are shown, and the conclusions on the interaction nature of biological tissue and an external current are drawn.
Simulation modeling of composite piezotransformer measuring transducer with differential output
Authors: Sedalishchev V N , Sergeeva Ia S , Strahatov D O 
Published: December 2021

Abstract
The article presents the results of using simulation modeling to study the output characteristics of composite piezotransformer measuring transducers with a differential output. The processes were simulated using the Micro-Cap software. The article presents options for controlling the parameters of the equivalent electrical circuit of the converter. The article presents the results of simulation of composite piezotransformer measuring transducers with two degrees of freedom. Structurally, they can include piezoelectric elements, additional vibrators and communication elements between them. This allows you to expand their functionality, scope of practical application. The advantages are applicable to work in difficult and even extreme conditions. On the basis of such measuring transducers, prototypes of highly sensitive sensors were developed for measuring pressures, forces, temperature and other physical quantities, for monitoring the physical and mechanical characteristics of solids, liquid and gaseous media.
Investigation of propagation dynamics of material deformations caused by laser pulse action
Authors: Banishev A F 
Published: December 2021

Abstract
The mechanoluminescent materials attract increasing attention of scientists due to their capability of visualizing the mechanical stresses and deformations experienced by them. The deformations of materials arising under the action of powerful laser pulses were studied. The composite mechanoluminescent materials based on the polymer and phosphor powder were used for visualization and registration of deformation evolution dynamics. The mechanoluminescent materials were deposited on the surface of the materials under study. It has been shown that the spatial distribution of glow intensity of the mechanoluminescent layer and the rate of its change make possible judging the value and rate of material deformation under laser pulses.
Evaluation of an elliptically polarized undulator for the future Taiwan Photon Source
Authors: Luo H.-W. , Chung T.-Y. , Lee C.-H. , Hwang C.-S. 
Published: December 2021

Abstract
The resonant photon energy of an adjustable-phase undulator
(APU) is varied with the relative motion of the magnet arrays along
the longitudinal direction. There exists, however, a transverse
field gradient (TFG) of order 100 T/m in an APU of small gap
(∼10 mm). Whereas the TFG might affect the electron beam as it
contributes to the dynamic field integral and the radiation
integrals, the TFG might also degrade the performance of the
synchrotron radiation due to the transverse position-dependent
magnetic field. The effects of the TFG on the present Taiwan Photon
Source (TPS) and future TPS-upgraded are analyzed to investigate the
feasibility of an APU that operates in the soft x-ray region.
Study of large axial space rebinning algorithm in γ-photon industrial tomography image reconstruction
Authors: Wang M. , Zhao M. , Yao M. , Liu J. , Guo R. 
Published: December 2021

Abstract
The accuracy of the existing single slice and Fourier rebinning algorithms depends on the projection angle of the line of response. The increase of such projection angle with the detector size, typical in the large axial space of γ-photon industrial detection, and the loss of some projection data after rebinning, result in the degradation of the image quality. In addition, those algorithms consider the probability of positron annihilation equally distributed along the line of response, which prevents to estimate accurately the positions of the annihilation point, and can originate artifacts and noise in the reconstructed image. In this work, we propose an alternative large axial space rebinning algorithm. In that algorithm, initially the line of response is divided into transverse and axial components. Then, each line of response is uniformly rebinned into all the 2D sinogram data intersecting with it. To improve the accuracy of the estimate of the annihilation point location and suppress the noise effectively, we assign a Gaussian weight coefficient to the projection data, and optimise the rebinning algorithm with it. Finally, we reconstruct the image on the basis of the 2D sinograms with the optimised weights. On the computational side, the algorithm is also accelerated by making use of parallel computing. Both simulation and experimental results show that the proposed method improves the contrast and spatial resolution of 2D reconstructed images. Furthermore, the reconstruction time is not affected by the new method, which is therefore expected to meet the demand of γ-photon industrial inspection imaging.
Estimating Opportunity Cost as A Tool to Evaluate Water Loss Management of Non-Revenue Water at PDAM Tirta Khatulistiwa
Authors: Indah D P , Karpriana A P 
Published: December 2021

Abstract
Water loss or Non-Revenue Water (NRW) is a national problem PDAMs, including PDAM Tirta Khatulistiwa. In fact, with a high level of water loss, there is a significant potential loss of income. This study aims to implement opportunity cost calculation as a managerial tool for PDAM Tirta Khatulistiwa in making investment decisions to improve water loss management. This research was conducted by collecting information from financial, managerial, and local government equity participation reports. Then the data reduction is carried out and calculated based on the gross margin, net profit margin, and the opportunity cost. This study indicates that the capital investment provided by the Pontianak City’s government has increased, followed by an increase in the number of consumers. However, it was not followed by an increase in the company’s profit. This is due to the opportunity cost or lost income during the business process amounting to Rp31,218,673,384.64 in 2019 with a potential income to Rp222,663,258,365.00 if it manages to suppress distribution leakage to the level of 20%. This potential income is worthy of consideration for PDAM Tirta Khatulistiwa to start water loss management in the NRW reduction program.
Bed Load Distribution Analysis of Pondo Poboya River to The Hydraulics Flow Parameters
Authors: Rustiati N B , Andiese V M , Oktavia S R 
Published: December 2021

Abstract
The aim is to know the effect of bedload sediment to river hydraulics parameters. The research was conducted by taking samples in three-part of the river. Each location is taken ten cross-sections with left, middle, and right parts of the river. Bedload sediment is calculated by the grain analysis method. There are several approaches in determining the roughness: Manning, Raudkivi, Subramanya, Meyer, and Muller roughness. From the analysis results, sediment in the form of fine sediment (d ≤ 0.15 mm) located in the middle of the cross-section does not settle due to high velocity. In contrast, in the wet area, the velocity is smaller so that grain material is deposited. The relationship of bedload sediment to the morphological form of the river shows that the middle part has the most material content in grain sediment (d ≤ 0.15 mm). The wet edge has the most content in gravel and sand (d < 6 mm). The Manning equation obtained a minimum roughness of 0.0257 and a maximum coefficient of 0.0365 with an average value of 0.0311. This value is matched with the coefficient of roughness on the Manning table does not differ much, i.e., natural, straight, and meandering channels.
Assessment of Groundwater Vulnerability using COP Method to Support the Groundwater Protection in Karst Area
Authors: Yogafanny E , Legono D 
Published: December 2021

Abstract
The karst landform holds considerable water resource potential and is known for its underground rivers. On the other hand, the high porosity carbonate rocks on this landform cause the decrease of the natural protection function against groundwater pollution. Hence, the analysis of groundwater vulnerability in the karst area is prominent before making the spatial planning regulation. This recent study aimed to analyze the groundwater vulnerability in the karst area located in a part of Umbulrejo Village, Yogyakarta, Indonesia, and proposed action in groundwater protection. The method used in this research was based on the COP method. The data acquisition was conducted by survey method both for primary and secondary data. The COP (Concentration of flow, overlaying layers, and precipitation) analysis was supported by ArcGis software. The analysis of groundwater vulnerability showed that there were two vulnerability classes, i.e., very high (48.6%) and high (51.4%). These results were influenced mainly by the close distance of the recharge area to swallow holes and the lithology type (karst), which contributed to a very high value in reducing protection against groundwater. A proposed action to support groundwater protection is regulating the land utilization in the area of the settlements.
Effectiveness Of Boezem As A Zero Runoff In Blimbing Subdistric, Malang
Authors: Andawayanti U , Cahya E N , Fitriyasari A , Saleh C 
Published: December 2021

Abstract
During the rainy season, inundation often occurs in Blimbing Hamlet, Malang, which caused by inadequate existing drains and lack of utilization in water catchment buildings. Therefore it is necessary to accommodate this condition using zero runoff concept, by utilizing boezem, which is expected there is no inundation at all by flowing flow immediately either seeping into the ground or into an artificial landfill. In Blimbing Hamlet, there is a boezem for serving and accommodating rainwater. For overcoming inundation in this area, maximalizing the boezem is significantly essential. This research is aimed to know the effectiveness of boezem for zero runoff. This assessment was done by hydrology analysis to obtain Q2, and Q5, for boezem planning, inlet outlets gate, and new drainage channels. The evaluation for existing drainage system showed there was inundation in some drainage channels. A boezem area of 836.9 m2 with 1.1 m depth can reduce inundation to 10%. Alternative inundation countermeasures are carried out with the added depth of 3 m, floodgates on inlets and outlets with of 0.5 m width steel gate, and drainage channel inlets and outlets. With the rehabilitation of boezem and other complementary buildings, it can reduce inundation by 30%.
Long-term Spatiotemporal Trend Analysis of Precipitation and Temperature in Citarum Watershed, Indonesia
Authors: Rahmad R , Wirda M A 
Published: December 2021

Abstract
Analyzing meteorological variables such as precipitation and temperature can give valuable information regarding past and future climate variability. Citarum Watershed is one of the world’s most threatened watersheds and the most degraded on Indonesia’s Java Island. The Indonesian government regards it as the most strategically important river basin territory because it supplies 80 percent of the surface water supply to Jakarta. This study aims to analyze the precipitation and temperature trend in the Citarum Watershed. This study is preliminary research and intends to provide a better insight into the impacts of climate change on water availability in the tropical region. The detection was carried out with the use of a Mann-Kendall with Sen’s slope. The results indicated that there are significant increasing trends of precipitation during the wet season. Whereas the increasing trend in temperature exhibits for all stations in the basin. The highest increasing trend is in Bandung City, the city with the highest urbanization rate in Indonesia. It is widely acknowledged that rising urbanization will have a considerable impact on the worldwide land warming trend.
Groundwater Resources Estimation in the Middle of Randublatung Groundwater Basin Based on Geoelectrical Investigation
Authors: Setyaningsih D L , Setyawan K , Putra D P E , Salahuddin  
Published: December 2021

Abstract
The high groundwater use in the Randublatung Groundwater Basin area relates to groundwater abstraction for agriculture. Therefore, a question arises on how much groundwater resources in this area may support agricultural groundwater usage. This research has the objective to quantify the groundwater resources in this area. This research conducts a geoelectrical investigation to identify the aquifer’s lithology and observe the groundwater level. The research reveals that resistivity values of subsurface rock layers in the research area range from 0.13 to 124.86 Ωm. The aquifer layer consisted of two aquifer systems, with the hydraulic conductivity varies of the aquifer layer is 0.0001 cm/s until 0.01 cm/s. The aquifer layers estimated to be found at depths vary 5 – 90 m from the ground with thickness range from 10 to 70 m. Meanwhile, the aquiclude layers consisted of clay, silty clay, and sandy clay was estimated to be found at depths varies 0 – 50 m from the ground with thickness varies from 5 to 65 m. by combining those data with a hydraulic gradient of groundwater flow, the dynamic groundwater resources in the research area is estimated between 50 m3/day and 4,691 m3/day.