bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of the electrical parameters dependences of oblique log-periodic antennas on the geometric structure of their reducing elements
Authors: Bestugin Aleksandr , Dvornikov Sergey , Dvornikov Sergey , Kirshina Irina
Published: December 2022

Antenna systems are an integral part of any transmitter-receiver device. A broad-band and frequency-independent antenna can be created applying a principle of electrical similarity. Its essence is that the electrical parameters of antennas remain unchanged if, with a decrease or increase in wavelength n times and, accordingly, decrease or increase the linear dimensions of the antenna elements. It is very important to guarantee the constancy of the antenna-radiating element’s parameters in a sufficiently wide frequency range. Log-periodic, biconical and various types of helical antennas satisfy these requirements. Structurally, a log-periodic antenna is a complex structure consisting of a symmetrical two-wire or four-wire collecting line. Radiators of the same type are connected to it in a cross order. The paper presents results obtained on the basis of modeling the electrical parameters of wide-range log-periodic antennas of the decameter range with different shapes of radiating elements in the MMANA-GAL environment. The authors considered methods for constructing periodic structures of flat log-periodic antennas. The interrelation of their structural elements is presented. It determines properties of wide-range operation. The electrical parameters dependences of inclined log-periodic antennas on the structural differences of their radiating elements are investigated. The conditions for the vibrator and frame emitters application are substantiated while maintaining the range properties of the log-periodic structure.
Simulation statistical modeling in the study of the laws of large numbers
Authors: Trofimets Elena , Trofimets Valery
Published: December 2022

The paper considers the theoretical foundations of the Monte Carlo method based on the limit theorems of probability theory. Simulations of a coin toss and the number of determination are given and described. The authors proved experimentally that sufficiently high accuracy of solving problems with the Monte Carlo method application is guaranteed only when a large number of experiments are carried out. Therefore, the Monte Carlo method is practically implemented only with the computer. The procedure for generating random numbers is a fundamental basis of the statistical test method. The average values tend to some constant with an unlimited increase in the number of experiments. It was found on the basis of a comparative analysis of the obtained results when studying the laws of large numbers by the method of simulation statistical modeling in MathCad and MS Excel. The Limit theorems guarantee the high quality of statistical estimates obtained by the Monte Carlo method for a large model dimension n. However, practically acceptable estimates of the simulated system’s characteristics can often be obtained even at relatively small values of n (of a few tens and hundreds). It has been proven that averaging the values obtained over several runs of the model significantly improves the quality of statistical estimates.
Analysis of the performance of languages for working with the ontological model of the assembly of 3D-constructions
Authors: Voinov Artem , Senokosov Ilya
Published: December 2022

The paper studies the performance of various languages used to work with ontological models. The languages are used in the methodology for modifying and verifying the 3D construction ontology presented in this paper. The methodology consists of three stages: building an ontological model of the assembly system and an ontological model of the desired 3D structure, modifying the original 3D structure model, and verifying the result in order to decide on further actions. The paper considers two groups of languages: query languages and modification languages. SQWRL and SPARQL are analyzed as query languages, and OWL DL and SWRL are used as modification languages. The comparison is based on the speed of performing such basic Boolean operations as conjunction and disjunction. To achieve the greatest objectivity a study is carried out on models of different dimensions. All measurements are made in the Protégé system since this system supports all 4 languages, the dependence of the runtime results on the runtime environment is minimized. The evaluation results are presented as a graph of the dependence of the rate of change in the process of performing an operation on the number of elements in the ontological model. The conclusion shows that the languages OWL DL (reasoner Pellet) and SWRL as ontology transformation languages and SPARQL as a query language are most suitable for working with the assembly ontology of 3D structures.
Study of corrosion resistance of friction welding joints between tubes and tube plate
Authors: Karetnikov D V , Tokarev A S , Yakhin A V , Fairushin A M
Published: December 2022

The cost of production and reliability of shell-and-tube heat exchangers is mainly determined by the features of the tube bundle and the joint between tube and tube plate (TTP) in particular. This paper provides a comparative analysis of the weld structure and electrode potential distribution of weld joints and base metal seams simulating the joint between heatexchange tube and tube plate (steel 5CrMo16) using the following welding methods: manual metal arc welding, gas tungsten arc welding and rotating friction welding. Comparison between macro- and microstructures of certain zones of tested welded joints, as well as values of electrode potential at specific points of the base metal and welded joints obtained by various methods, made it possible to conclude the effectiveness of application of specific ways of welding by their effect on corrosion resistance of given assembly.
Assessment of the possibility of using RFW for the production of composite joints from steel X10CRNITI18-10
Authors: Karetnikov D V , Tokarev A S , Yakhin A V , Fairushin A M
Published: December 2022

An effective way to avoid heat treatment in the production of pipe beams of heat exchange apparatuses is to replace tungsten inert gas (TIG) welding with rotary RFW (RFW), but at the moment there is no information on the characteristics of welded joints of steel X10CRNITI18-10 obtained by RFW. In this article, the possibility of using RFW to obtain composite joints of a changed design was evaluated. To do this, studies were carried out on the structure of the metal, tests for static tension and impact bending of samples of X10CRNITI18-10 steel obtained by RFW.
Modeling and optimizing of complex electrodynamic objects
Authors: Ya Lvovich I , Lvovich Ya E , Preobrazhenskiy A P , Preobrazhenskiy Yu P , Sakharov Y S
Published: December 2022

This paper is connected with the necessity of problem modeling and optimizing complex electrodynamic objects. A hollow structure is considered as such object. Its shape and main dimensions are set. It is required to determine the value of the size of the selected element to ensure the maximum average values of the characteristics of the object under study. In the course of modeling the scattering of electromagnetic waves, the method of integral equations was used. The collocation method was used to solve integral equations. The algorithm for determining the dimensions of an element of a hollow structure was developed. The approximation of the dependence of the element size on the length of the entire object was carried out.
Statistical evaluation of a robotic six-wheel structures mechanism based on motion simulation
Authors: Magomedov I A , Luis Ordoñez-Avila José , Bagov A M
Published: December 2022

In this work, a Mars rover is used to collect results on overcoming some of the obstacles that may be encountered in a Martian mission. These rovers are primarily used to gather information on the surface of Mars about past water activity. Therefore, the ability to overcome an unknown set of obstacles and how its function in different scenarios is vital. The aim of this work is to compare two proposed mechanisms for six-wheeled robotic structures through descriptive statistics and correlation test. As main results it was found a strong relation between the contact force between wheels and obstacle with the torque of the motors. Concluding that structure 1 has better performed in linear velocity and structure 2 use his independent links are used to reduce the contact force.
Overview of finish machining methods for the internal surfaces of rectangular pipe parts
Authors: Ivanov P A. , Levko V A , Litovka O V
Published: December 2022

The article deals with the proble of finish machining the internal surfaces of straight and curved pipe parts of rectangular cross-section. There is carried out analysis of technological capabilities of special finish machining technologies of internal surfaces in the Russian Federation. General information, disadvantages and advantages of these methods are presented. The selection criterion is the uniformity of machining on straight and curved parts of the pipe part. There are proved the main advantages of choosing an abrasive flow machining method as a fairly inexpensive method of finish machining. A scheme for finish machining the internal surfaces of rectangular parts is proposed. The composition of the working medium has been chosen, which allows for uniform machining, including in the corners of a rectangular cross-section.
Laser diagnostics of multi-axis machines for volumetric error
Authors: Sokolov V A , Teleshevskii V I , Masterenko D A
Published: December 2022

The paper describes a method of laser correction of geometric errors for CNC-controlled multi-axis equipment – CMMs and machine-tools. The method utilizes Kalman’s concept of “control and observation”. A multi-function laser interferometer is suitable to be used as an “observer” for digital production, and a CNC-programs postprocessor, introduced between CAM and CNC-systems, is used as “controller” of machine-tool’s accuracy. The result is three-dimensional distribution of volumetric accuracy within machine’s workspace – an important tool for diagnostics of the machine and the production process in general and its ability to produce and measure precision parts in particular.
Automated control and control system of emissions into the atmospheric air of thermoelectric-power industries
Authors: Kulakova E S , Safarov A M
Published: December 2022

The article describes new approaches to the systems of automated monitoring and control of emissions into the atmospheric air of thermoelectric-power industries. The purpose of creating such systems is to reduce the level of impact on the air of residential areas and control its quality. The basis of this air quality management system is the continuous measurement and registration of pollutant concentrations both at emission sources and in the air of residential areas. Due to the analysis of meteorological conditions in combination with the use of the method of marker compounds, statistical processing of the obtained analytical data, a decision is made not only about the degree of impact on the environment, but also the determination of the specific polluter of this contamination. The complexity of this goal lies in the need to maintain a large fleet of analytical measuring instruments with varying degrees of sensitivity. The article proposes methods to reduce the diversity of the instrument base, which leads to an improvement in the performance of automated air quality control devices and to simplify the maintenance of such systems. The use of such systems allows for the optimization and digitalization of air quality management systems in the residential area as a whole through the use of various controllers and soft hardware.
On application of WEB-GIS technologies in environmental screening of territories
Authors: Letyagina E A
Published: December 2022

This article discusses application of WEB-GIS technologies during environmental screening of territories of the Russian Federation, raising questions about the essence of the concepts of “GIS” and “WEB-GIS technologies”, and the understanding of the content aspect of these terms. Moreover, the possibility of using WEB-GIS technologies in conducting environmental monitoring is considered in sufficient detail, and the potential of these systems for the state bodies’ exercising control over the state of the environment is revealed. The article provides illustrative examples of application of WEB-GIS technologies in the implementation of environmental screening in the Krasnoyarsk Territory, a subject of the Russian Federation. In addition, the factual data – publicly available at any time through the Internet both in retrospect and by specific monitoring parameters at a particular point tied to an exact location – are analyzed. The study also identifies specific positive aspects of the use of corresponding GIS by state authorities in monitoring the state of the biosphere and tracking local environmental problems for making appropriate regulatory decisions that ensure the safety of life of the population. Furthermore, the authors identify trends, directions of development, and prospects for further use of WEB-GIS technologies during environmental screening in the territories of the Russian Federation.
Description of the development of an experimental stand for the detection of defects in pipelines
Authors: Korobova L A , Matytsina I A , Kalugin V A , Tolstova I S , Mironova M S
Published: December 2022

The article discusses a bench that allows you to monitor the change in the dynamic characteristics of the medium when various types of defects appear in the connection lines. The setting makes it possible to select the optimal method for recording the measured values. The experimental stand was created as close as possible to the real conditions of the pipeline operation. To detect damage to the air circuit, the integration of technical developments with a software algorithm based on the use of the multiple signal classification method (MUSIC) was applied. The developed stand opens up opportunities for conducting practical experiments and obtaining experimental data directly when detecting pipeline defects.
Metrological aspects of determining the electron concentration and the conductivity of a melt using a conductivity sensor
Authors: Revunov G M , Kryachko A F
Published: December 2022

For radiophysics, research into plasma physics is of great interest. During the movement of a hypersonic aircraft, the main physical phenomenon, which radically affects the conditions for the propagation of electromagnetic waves in its vicinity is the formation of a plasma shell around the apparatus due to the ionization of neutral particles. The resulting plasma around a hypersonic aircraft has a very high concentration of electrons and prevents the propagation of electromagnetic waves in space, partially absorbing them and reflecting them from its surface. When measuring the electron concentration, it is necessary to take into account the measurement error. In this article, the error is measured on the basis of expressions obtained for a transmission line whose longitudinal dimension exceeds the wavelength propagating in it. Mathematical model for finding the error in determining the electron concentration and melt conductivity is considered, and an analysis of the optimal combination of sensors is carried out.
Modeling of functioning of a functionally gradient transversally isotropic hydroacoustic coating on a rigid vibrating body wall
Authors: Storozhev S V , Storozhev V I , Bolnokin V E , Mutin D I , Sorokin S A , Minh Hai Duong , Zaslavskiy A A
Published: December 2022

A numerical and analytical technique is presented for the computational analysis of the performance indicators of a functionally gradient transversally isotropic flat single-layer hydroacoustic coating with a variable exponential transverse inhomogeneity index, fixed along one of the boundary surfaces without slippage with an ideal contact on a rigid vibrating body wall and contacting on the opposite surface with a half-space of an ideal slightly compressible fluid. In addition to the vibrations of the housing surface, the model takes into account the impact of a plane hydroacoustic pressure wave normally incident on the contact boundary of the coating and the liquid, and the evaluation of the effectiveness of the coating is based on the analysis of the cumulative intensity of the pressure wave emitted by the surface of the coating contact with the liquid under these complex influences. An example of calculations using the described technique is considered, within the framework of which estimates are obtained for the values of the inhomogeneity parameter that ensure the most effective functioning of the coating in various frequency ranges of the effects under consideration.
Solar radiation spectral composition determination program
Authors: Debrin A S , Semenov A F , Zapletina A V , Akhmetshin A T
Published: December 2022

The article describes the work of a software product designed to process the results of analytical studies on the effect of solar radiation intensity on its spectrum by bigarmonic interpolation. As a result of the program, the processed analytical data is converted into three-dimensional surfaces showing the dependencies of studies on the effect of solar radiation intensity on its spectrum, the height of the sun and geographical coordinates. The program allows you to determine areas with a certain percentage of the spectrum from the height of the sun and is used in research organizations, educational institutions and design organizations of the electric power industry.
Study of the luminescence of SiO2 crystals
Authors: Mustafakulov A A , Olimov O N , Parsokhonov A G , Akhmedov A A , Nurullaev O U
Published: December 2022

The work represents the results of research into the issues of radiation materials science. The foundation of modern science and technology is the production of materials with predictable properties. In this regard, much attention is paid to issues related to the synthesis and growth of crystalline substances. The luminescent properties of quartz crystals grown on neutron-irradiated seeds were studied by the methods of gamma luminescence, thermo luminescence and thermal de-excitation. It has been established that in neutron-irradiated seeds and quartz crystals grown on them, there are defect centers belonging to the β-phase of quartz. The dependences of the concentration of these centers and β - phase on the neutron fluency correlate well with each other. A direct proof of the mechanism of the α - β-transition in quartz under neutron irradiation has been obtained.
Power supply of the underwater dock station from the inverted float wave power plant
Authors: Martynov A A , Chernysheva O B
Published: December 2022

This article presented the results of the development and calculation of the plant supply system for an underwater dock station using a three-phase float wave power plant of the inverted construction. The results of the completed work allow to solve the problem of creating the plant supply system for underwater dock stations and resident underwater robots, as well as speed up their implementation in practice.
Radar Absorbing Properties of Barium Hexaferrite Accompanying with Cu Powders in Polymer Composite Coatings
Authors: Atay H Yılmaz
Published: December 2022

Radar, which is an electronic and electromagnetic system that works with the use of radio waves to detect and locate objects, has led to the need for radar absorber materials for some military applications, especially for defence and security. In this study, barium hexaferrite and copper powders were used to investigate a radar absorbing composite material. Barium hexaferrite powders were synthesized by Sol-Gel method. Barium hexaferrite and copper powders were added to a polyurethane resin at different loading levels to interpolate the radar absorption property. Metal substrates were covered with these polymeric composite materials. Characterization tests such as X-Ray Diffraction, Scanning Electron Microscopy (SEM) and scratch test were performed. For evaluating the radar absorbing properties of reinforced composites, a Network Analyzer was used. It was concluded that use of barium hexaferrite and copper powders improved absorbing activity of the coatings. Increasing the amount of barium hexaferrite and copper powders in the coatings, increased the radar absorption performance. Besides, very good synergistic effects were obtained in between barium hexaferrite and Cu powders. The reason for this is thought to be their own individual magnetic properties and electrical that work in the radar absorption mechanism.
Numerical analysis of PCM integrated year-round thermal energy savings building for composite climatic conditions
Authors: Kumar S , Sheeja R , Pitchandi Perumal , Mullai Sudaroli B , Pichandi Chandrasekar , Sai Krishnan G S
Published: December 2022

Incorporating PCM in building envelopes is a promising energy-saving technique. Because the PCM container maintains a constant temperature when storing and retrieving energy. The PCM is used in building envelopes to diminish solar irradiation, reducing heat penetration and lowering heating and cooling loads. It’s vital to get the right PCM for different climates. Because the ambient air temperature fluctuated a lot throughout the year. PCM temperature effectiveness is highly determined by local ambient weather conditions. It is challenging to design the PCM integrated building for year-round thermal regulation. This research discussing PCM’s thermal energy effectiveness in building walls for decreasing interior temperature variance in composite climatic systems using numerical simulation using EnergyPlus software.
Performance improvisation of 10kWp grid connected solar photovoltaic system - a case study
Authors: Kamaraj V. , Rengaraj R. , Venkatakrishnanc G.R. , Deshpandeb Mrunal
Published: December 2022

Renewable energy sources like solar, wind and biogas are finding its importance in today’s world to reduce the carbon emissions from conventional sources. Photovoltaic (PV) arrays with solar cells have been integrated to convert light energy into DC electrical voltage. The output is fed to inverters and step-up transformers to get the required AC voltage reliable to be interfaced with grid. The optimal working and survival of the plant is based on the performance ratio obtained irrespective of varying climatic conditions. In this paper, a 10kWP grid connected plant existing in SSN College of Engineering, Chennai, India is considered, and various performance indicators is used to analyse its performance. A data logger was designed to track and process the real time data instantaneously obtained from temperature and irradiance sensor, inverter and energy meter and is connected to a router through LAN. Performance analysis is performed by calculating different ratios based on the retrieved data. In addition, a modified hardware model for 10kWP plant was also implemented to improve the performance ratio of the plant. The result analysis shows that the proposed modified hardware model has helped in increasing the performance ratio from 43% to 85%.
Investigation of Dual Fuel with Bipartite Additives in CI Engine
Authors: J Hemanandh , Hemanandh Sharmila , Ganesan S , Venkatesh S , Ravichandran B. , Praveen Kumar J.
Published: December 2022

Extend the longevity of diesel in the world there is a need for identify ing alternatives sources. Biodiesel is the one of the best alternatives to overcome the fuel crises, day to day fuel price arise and environment emission concerns. In this study, the performance of the engine and emission has been studied. The raw non-edible waste cooking oil and Jatropha oils are equally blended 1:1 ratio is used to convert the biodiesel with methanol and alkaline catalyst KOH (Potassium Hydroxide) by transesterification process. Evaluated the physical properties of WJB value as per ASTM Standards. Nano additives magnesium oxide and graphene oxide were added 2:1 ratio mixed with biodiesel and diesel blend. The 4-stroke diesel engine used to find emission and performance of the bio-diesel blend WJB10, WJB20, WJB30,WJB40 and compared with mean diesel. The performance test ,combustion test and emission result were found lesser fuel consumption with brake thermal efficiency and reduced HC,CO,CO2 and NOx in WJB30 fuel blend compared to diesel.
Study on Performance and Emission Characteristics of CI Diesel Engine by adding liquid additives with Dual Fuel
Authors: J Hemanandh , Hemanandh Sharmila , Ganesan S , Venkatesh S , Shanmugam Balahari , Jayakumar T.S.
Published: December 2022

For an extensive stretch of time, diesel motors have turned into the world’s “Central player” of transportation. However, fuel consumption, late natural concerns, and accordingly consistently expanding fuel costs have made the quest for another fuel basic. Scientists have shown an enormous interest in testing different plant and vegetable oils as an enhancement for diesel. This foundation Nox discharge is conveyed during the ignition of energizes at high temperatures. Inordinate NOx discharge has a scope of consequences for human wellbeing and the environment. In this article, we will talk about elective energy sources in contrast with petroleum derivatives utilizing the ASTM standard. Thus, in this specific occasion, we’re subbing waste cooking oil and Juliflora oil for nano-added substances like magnesium oxide (MgO) and ferrofluid (Fe3O4). The two oils are mixed in the accompanying rates: 10%, 20%, 30%, and 40%. The SBU Variable Compression Ratio Engine was utilized to execution examination, burning, and outflow attributes. Therefore, we can see a diminishing in HC, a break in warm execution, and an increment in NOx.
Perspectives in advance technologies/strategies for combating rising CO2 levels in the atmosphere via CO2 utilisation: A review
Authors: Joshi N , Sivachandiran L , Assadi A. A.
Published: December 2022

This review provides exhaustive literature on carbon dioxide (CO2) capture, storage and utilization. CO2 is one of the greenhouse gas, emitted into the atmosphere and has reached an alarming level of well above 400 ppm. The consequences of rising CO2 levels and global warming are visual in day today life such as floods, wildfires, droughts and irregular precipitation cycles. Several reviews, focused on a particular topic, have been published since the 19th century and recently. However, in this review, we have attempted to cover all the CO2 mitigation techniques available for their advantages and disadvantages have been discussed. The blooming technology of carbon capture and storage (CCS) and the pros and cons of CO2 capture, transportation and storage techniques are showcased. Interestingly the transportation of captured CO2 to the potential storage sites requires more than 50% of the total energy budget, therefore, this review is dedicated to the onsite CO2 conversion into value-added chemicals. Various technological advancements for CO2 conversion into other products by the solar thermochemical, electrochemical and photochemical processes have been analysed. From the extensive literature, it’s demonstrated that NTP (Non-Thermal Plasma) is one of the emerging techniques for the direct conversion of CO2 into value-added products as it is energetically efficient. The mechanisms of CO2 activation by thermal and NTP-catalysis have been discussed. Moreover, the benefits of DBD to obtain oxygenates like methanol, aldehydes, acids, and hydrocarbons from direct one-pot synthesis are discussed. The production of such value-added chemicals from CO2 is of prime importance as it will be our step towards a carbon-neutral economy which is the need of the hour. This review has also attempted to compare the cost-effectiveness of current existing techniques for CO2 capture and utilized solar to fuel efficiency to compare distinct technologies available for the utilization of CO2 to value-added chemicals.
Multi Regression Model for Cutting Force During Dry Turning of Duplex Stainless Steels Using Definitive Screening Design
Authors: Deshpande Naresh C , Vasudevan Hari
Published: December 2022

Considering the current trend in environmentally friendly machining or dry machining, it is observed that it’s adverse effect on various surface integrity aspects is usually not covered adequately in the literature. This adverse effect leads to untimely in-service failure of components subjected to fatigue loads. This research work has advocated the use of dry machining with consideration on minimizing its adverse effects by selecting appropriate machining parameters for Duplex Stainless Steel (DSS). These materials pose various challenges during secondary processing operations, like machining, due to lower values of thermal conductivity, higher values of tensile strength, toughness, work hardenability & tendency for built-up edge formation. In such applications, higher values of cutting forces are generated, and efforts are required to minimize them in order to reduce the carbon footprint. A multiple regression model for cutting force, during turning of DSS was generated as part of the study, based on experiments conducted using Definitive Screening Design (DSD). Four process parameters, viz. cutting speed, tool feeding rate, depth per pass and radius of curvature of tool nose were varied at three different values independently and their effect on main cutting force was observed. The multiple regression model generated using the stepwise procedure has coefficient of determination (R2) of 99.7 %. Cutting depth followed by rate of feeding and radius of curvature of tool nose were found to be influential parameters in the model. Minimization of force by desirability optimization method was further carried out. This resulted in minimum value of force as 128.6 N. For this, cutting speed of 120 m/min, feed rate of 0.1 mm/rev, depth per pass of 0.5 mm and tool nose curvature radius of 1.6 mm should be selected. The composite desirability score for these optimum settings was 98.79 %.
Current Mode Proportional Resonant Controlled DC Micro Grid System with Enhanced Response
Authors: Balaji B. , Ganesan S. , Pugazhendiran P. , Subramanian S.
Published: December 2022

Closed-loop DC Micro-Grid containing sustainable power sources, stockpiling components and burdens are introduced. The regulators for helping the control of mico-grid are numerous in the power-frameworks, yet the most normally utilized one is PI regulator. Aside from PI there are, an entire bundle of independent regulators and hybrid regulators that can serve significantly better compared to PI for microgrid framework relevance’s. Closed-loop DC microgrid framework system with FOPID-FOPID (Fractional-order-Proportional-Integral Derivative controller) and PR—PR (Proportional-Resonant Controller) based DCMG structures are investigated and re-enacted utilizing Simulink in MATLAB and their outcomes are introduced. After re-enactment analyses, some preliminary eventual outcomes of FOPID-FOPID and PR-PR controlled DCMG framework are given to actually look at the sufficiency of the proposed framework.
Precursory Characteristics of Flash Flood Occurrence in Small Catchment of Upper Brantas River
Authors: Legono D , Harset D , Hairani A , Ikhsan J , Harsanto P
Published: December 2022

Indonesia’s flash floods have increased significantly since the flash flood in Bohorok, North Sumatra, in 2003 and Jember, East Java, in 2006. Such flash floods have caused negative impacts, loss of human life and damage to vital infrastructures such as houses, roads, bridges, or other public facilities. Understanding the factors driving flash floods and their mechanism at the outset is essential in mitigating the negative impacts mentioned above. This paper presents the results of the analysis of the flash flood characteristics of several hydraulic parameters under conditions just before the flash flood incident, including the intensity of the rainfall, the time of concentration, and the time lag of the occurrence. As the object of the study, a flash flood event was selected in Batu City, Upper Brantas River, which occurred on November 4, 2021. The results show that the lag time of the flash flood occurrence at 40 minutes magnitude at Bulukerto Village of Batu City, the application of Kirpich for the time of concentration equation performed better than the Ventura and Watt & Chow equations. Further assessment of precursory characteristics for other similar small catchment and hydro-meteorological conditions is still the subject of beneficial study or research.
Causes and impact of extreme Low Level Wind Shear (LLWS) event at Soekarno-Hatta International Airport
Authors: Ratnasari Y , Trilaksono N J , Septiadi D
Published: December 2022

The impact of low-level wind shear (LLWS) is still a critical issue in aviation. These days, as the aviation industry grows, it must follow safety improvement efforts and transportation management, one of which is through the accurate publishing of LLWS early warning. Therefore, it takes a high understanding related to phenomena, especially at airports with busy schedules. This study examined the causes and impacts of pilot-reported LLWS on April 5, 2018, from 13:15 to 16:00 UTC at Soekarno-Hatta International Airport which is the busiest airport in Indonesia. The data used are Doppler weather radar, automated weather observing system (AWOS), as well as synoptic and upper air observations. Based on the result of this research, linear convective clouds created from deep convection due to very unstable atmospheric circumstances are the cause of LLWS. A sizeable line of convective cloud with a 50-55 dBZ reflectivity accompanied by an outflow microburst (MBA) was detected crashing the airport. Heavy rains and strong winds up to 15-20 m/s speeds from the line of convective cloud triggered the formation of destructive LLWS. Subsequently, there was traffic build-up at 5 flight holding points before landing. Furthermore, 7 flights (Airbus, Boeing, and CRJX) underwent go-around, and 3 flights (Airbus and Boeing) were diverted.
Introduction to the cyber-environmental law: convergence of human, technology and nature
Authors: Maskun  , Assidiq Hasbi , Bachril Siti Nurhaliza , Mukarramah Nurul Habaib Al
Published: December 2022

Cyberlaw and environmental law have different development histories. Cyberlaw is still a relatively new regime that developed a few decades ago, and the environmental law was substantially already developed 4000 years ago. However, it was not until the 1972 Stockholm Declaration that modern environmental law became more advanced than ever. The problem is that the cyber and environmental laws are not seen as convergence, yet there is still no theory or concept to see this as a unitary system of rules. Sometimes, it makes law enforcement not advance well enough. This article aims to analyze the possibility of bridging the cyber and the environmental law to create a convergence of law and legal theory. The theory of law applied in this article is the theory of legal convergence and the theory of legal development. This article’s method is a normative legal approach to solving this problem. The results of this study are the convergence of both laws can initiate the possibility of a new theory called the Cyber-Environmental Law. The idea can advance it and provide practical benefits for law enforcement in the environmental fields and harmonize amongst humans, technology, and nature.
Performance of cowpea at two differents planting season in sandy soil
Authors: Liana T , Nuraini L , Agustini S , Bhermana A , Susilawati
Published: December 2022

Performance of cowpea (Vigna unguiculata L.) in two different planting seasons in sandy soil was affected by base fertilizer application. Significantly, cowpea has responds to organic fertilizers. These treatments allow cowpea growth better. This research consisted of two phases, following the season i.e., planting season II/October 2020 to March 2021 and planting season I/April to September 2021. The first planting was aimed to study the effectiveness of three types of organic fertilizer treatment, with nine replications. The second planting was done without additional organic fertilizer that consisted of nine replicates (continued from the first planting). This research that was carried out at visitor-plot of Central Kalimantan AIAT in 2020 to 2021and it was arranged in a randomized block design consisting of 4 treatments, namely: (A) control/without fertilizer; (B) 5000 kg/ha goat manure; (C) 5000 kg/ha cow manure; and (D) 5000 kg/ha chicken manure. The results showed that organic fertilizer (chicken manure) had higher yields both in the first planting and second planting compared to inorganic fertilizer.
Smart Environment Planning for Smart City Based On Regional Medium-Term Development Plan Surabaya City 2021-2026
Authors: Sukarno Mohamad , Putri Shelsa Aurelia Gunawan
Published: December 2022

The high rate of urbanization in urban areas has a significant impact on urban governance related to environmental issues. Over the past ten years, there has been a degradation of environmental quality in Surabaya due to high levels of environmental pollution. Surabaya city has also been known as a city that applies the concept of the smart city wherein the concept there are also smart environment indicators. of the smart environment in the RPJMD planning document 2021-2026. The research method used is qualitative with case studies in Surabaya using descriptive qualitative data analysis techniques on secondary data. The results of this study show that the Surabaya City Government in RPJMD 2021-2026 has not implemented the concept of a smart environment as a whole. This is seen in the RPJMD document of Surabaya City 2021-2026 which only plans programs such as green buildings by planning in green infrastructure but for planning green buildings have not been planned.
The Study of Ecological Behavior of Youth in High School X in Jakarta
Authors: Tumanggor Raja Oloan , Subekti Slamet , Dariyo Agoes
Published: December 2022

The study of ecological behavior becomes urgent when dealing with the issue of climate change which is increasingly worrying. The discussion of ecological behavior among teenagers is important because they are the main actors in the progress and maintenance of the natural environment. This study aims to examine the ecological behavior of adolescents in a high school X in Jakarta as a metropolitan city that requires ecological behavior to maintain a better survival. Ecological behavior is individual behavior that contributes to the maintenance of the natural environment. Using qualitative method with data collection techniques through structured interviews and observations, this study seeks to explore the experiences of adolescents in caring for and maintaining their living environment. Behavior, of course, begins with the correct perception and awareness of the environment. The research is expected to be able to find and offer an effective formula in building the ecological awareness of young people for the advancement of sustainable development. The results of the study show that to build ecological behavior among young people, it is necessary to have adequate awareness and understanding of the various ethical theories that underlie such ecological behavior. With this understanding, it is hoped that teenagers will be more motivated to behave in an ecological manner starting from the surrounding environment.
Implementation evaluation of sustainable concrete for toll road project in Indonesia
Authors: Paladan F O , Muslim F , Machfudiyanto R A
Published: December 2022

Building excellent, established, sustainable, and resilient infrastructures is one of agenda in Sustainable Development Goals program. Massif toll road construction in Indonesia is a form of government effort to support this program. Nevertheless, a study about toll road construction in Indonesia estimates that toll road construction in Indonesia between 2009-2019 produce 29.941.737 tons of greenhouse gasses emission. Implementation of sustainable concrete is a way to support construction projects while keep on emphasize to environmental issues. This study will analyze existing condition of concrete use in toll road construction project and factors determining implementation of sustainable concrete to further formulate a strategy on upgrading implementation of sustainable concrete. The result show that implementation of concrete study in toll road construction projects in Indonesia is not optimal. There are two group becomes a dominant factor determining implementation of sustainable concrete in toll road construction project in Indonesia.
What Determines the Implementation of Development Planning Deliberations in The Village?
Authors: Mustanir Ahmad , Yusuf Muh , Sellang Kamaruddin
Published: December 2022

The purpose of this study was to determine the effect of variables on community participation and decision-making in development planning deliberations in the village. The problems found are that community involvement has not been maximized in development planning deliberation activities, community involvement in decision making is still very minimal and dominated by the same people from year to year, development planning is only a formality because there is no control mechanism from the community. Community proposals only fulfill the list of existing programs, without any guarantee that the program will be accommodated. This study uses a quantitative descriptive method. The data that has been collected is processed by frequency distribution and multiple linear regression analysis. Validity test, reliability test, and data normality test were also carried out using the SPSS 20.0 for the windows program. The results showed that the influence of community participation and decision-making in the development planning deliberation went quite well and were decisive. Although the Village Government still must improve the decision-making system in development planning deliberation by creating a more participatory mechanism.
Utilization of water hyacinth in constructed wetlands for wastewater treatment
Authors: Latip Siti Noor Hajjar Md , Damanhuri Siti Nur Aida , Ibrahim Nur Diana , Chin Khor Bee , Nasruddin Mimi Fadzlin
Published: December 2022

Municipal wastewater discharge is one of the most serious threats to the ecosystem. The sewage needs to be treated appropriately before the wastewater can be released into the environment. In recent years, the application of constructed wetlands, and facultative ponds treating domestic sewage has attracted attention because it is environmental approach. Vegetation considered as a dominant feature of constructed wetlands, and acts as a biotic factor in the treatment process. The water hyacinth (Eichhornia crassipies) appears to be a promising candidate for pollutants removal owning to its rapid growth rate and extensive root system. This study is conducted to determine the efficiency of water hyacinth in wastewater treatment for nutrient removal and to identify the best practices for water hyacinth cultivation in the sewage treatment plant (STP). Plant growths and water quality were measured to determine the suitability of water hyacinth for sewage treatment plant. Water hyacinth has a good potential to be utilized in constructed wetlands for wastewater treatment.
Exploring the Development of Poverty Eradication Efforts in Southeast Asia: A Scientometric Perspective
Authors: Rahmah Mutia , Nooraini Afni , Hamdi Muchlis
Published: December 2022

This article intends to find out the development of Southeast Asia countries efforts in eradicating the poorness by mapping proclivity of the topics in the Scopus database. VOSviewer 1.6.18 was used to visualize such trends. This study shows that there are 187 relevant publications yet only 20 of them specifically discuss poverty eradication efforts. Indonesia is the most productive country in publishing such efforts. Andam’s document in 2010 is the most cited article that discusses the impact of protection systems on poverty as an effort to eradicate poverty in Thailand. Furthermore, efforts to eradicate poverty in Vietnam are implemented by enhancing the poor and providing funding facilities. In the Philippines, such efforts are accomplished through strengthening the poor networking and creating community support system, while in Malaysia the focus is more on IT. Meanwhile, other countries did not specifically discuss poverty eradication efforts.
The Height of Smoke Injection and Atmospheric Conditions on Smoke Dispersion in Riau Province Using The CALIPSO
Authors: Muhlis A , Trilaksono N J
Published: December 2022

Every year, smoke is still a significant problem and challenge in Indonesia. Forest and land fires cause vast amounts of smoke, negatively affecting society, such as health by decreased air quality index and transportation through reduced visibility. Factors that affect the spread of smoke from a fire source include wind, smoke injection height, and atmospheric conditions. This study examines the smoke dispersion that occurred on 23 and 31 August 2019; and 18 September 2019 in Riau province, where smoke was identified by the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO). The results showed that the height of the smoke injection was relatively high, ranging from 1.6 to 2.5 km, the majority of which are above the Planetary Boundary Layer (PBL). Winds that move from the southeast and southwest with a speed of 3-5 m/s support the growth of the smoke column and the transportation of smoke from the fires to the downtown area of Pekanbaru. A secondary stable layer in the lower layer supports the fumigation process, which resulted in a decrease in the air quality index in Pekanbaru at the event to an unhealthy level and visibility up to 2 km.
IMERG-E satellite rainfall estimation error decomposition for early warning use in several parts of Indonesia
Authors: Pandiangan A E C , Syahputra M R , Hadi T W
Published: December 2022

An early warning can be used with rainfall input from satellite estimation to prevent and reduce losses due to flood risk. IMERG-E satellite rainfall estimation has fast time latency and can be used for this purpose. We tried to separate systematic and random components of the error of IMERG-E rainfall estimation. An additive error model used for this decomposition assumes that the linear function can fit the relationship between satellite and references measurements. The references measurements are hourly hellman rain gauges in several parts of Indonesia. The result shows that more stations have dominant systematic components in JJA than in DJF seasons. In 1-hr temporal, the random components are more dominant (>50%) in almost all study areas. Systematic components are dominant at Padang Pariaman and Jembrana stations (>50%) for all periods. Coarse spatial aggregation (0.2° and 0.3°) increased systematic components and lowered temporal (3-hr and 6-hr) decrease systematic components throughout the study area. Dominant random components in almost the entire study area show IMERG-E challenging to correct, and caution is needed when used as input for early warning in most parts of Indonesia. Bias reduction IMERG-E in Indonesia needs to be developed considering different seasons and locations.