bluuebunny/crossref_metadata_2025 huggingface dataset:
Characteristic of groundwater well quality using bivariate analysis: A case study at USM Engineering Campus, Penang
Authors: Akbar N A , Aziz H A , Adlan M N
Published: February 2021

This study was carried out to determine the water quality at USM tube well based on the physico-chemical and biological characteristics. In this paper, the groundwater sample was extracted from the USM tube well through pumping process. The sample was collected twice a month for one year (n=24). Water quality analysis was conducted by in-situ and laboratory testing. Ten (10) water quality parameters such as turbidity, colour, total dissolve solid (TDS), conductivity, pH, total hardness, heavy metal (Fe & Mn), total coliform and E-Coli were analysed and compared the result with Raw and Drinking Water Quality Requirement established by Malaysian Standard (MS2320). The relationship between parameters was also analysed statistically using Spearman’s correlation coefficient (r2). Result shows that Fe has a strong positive correlation with Mn and conductivity. The correlation between conductivity- Fe and conductivity- Mn have a strong positive correlation with r2 between 0.6 and 0.79. This indicates that cation minerals in soil, sediment and rock such as Fe and Mn leach out into groundwater and thus contribute to the electrical conductivity of groundwater. Moreover, Mn demonstrated a significant positive correlation with conductivity and TDS. The strong relationship between Mn- TDS (r2 = 0.77) and Mn- conductivity (r2 = 0.75) respectively, suggested that the concentration of Mn in USM tube well was influenced by dissolution minerals in groundwater. On the contrary, the correlation between turbidity-hardness, turbidity-E-coli and turbidity-total coliform showed a very weak positive (r2 < 0.2) and negative (r2 < - 0.2) significance, which indicates that turbidity was not significant with all parameters present in USM tube well. Overall, it can be concluded that the water quality from USM tube well is not recommended for drinking, which did not comply the Malaysian standard of drinking water. However, it can be used for other purposes such as irrigation and industrial activities.
Study of environmental awareness, practices and behaviours among UniMAP students
Authors: Makhtar Salwa Zaini , Amirah A S N , Wahab Mahyun Ab , Hassan Zulkarnain , Hamid Salah
Published: February 2021

Environmental awareness has received much attention in recent years due to human population growth, even though science is improving every day. Still, that improvement comes with risks that can be avoided with a little bit of knowledge. Understanding the public’s environmental awareness is essential to inform government approaches to addressing this issue. This study presents a cross-sectional survey of young generations, Universiti Malaysia Perlis (UniMAP) students between the ages of 20 and 25, to examine the perception, awareness and opinions of Malaysian students about the environment. The survey consisted of three sections, which included information on socio-demographic information, information on public perception of the environment, information on public awareness of the environment and its related impacts, and information on environmental attitudes and recommendations to address some of the related environmental issues. The results show that the value of environmental awareness and knowledge is good, which indicates that there is a high level of knowledge and awareness among university students. Of the 107 respondents, more than 70 per cent were positive and had an adequate level of environmental awareness, and 60 per cent showed positive environmental practices and behaviours.
Social behavior and institutional support on the swamp rice sustainability
Authors: Yusuf R , Istina I N , Fahri A , Zulfia V , Fuadi I
Published: February 2021

Social behavior of the community and the institutions that support farming facilities and infrastructure affect the success of farming. The purpose of this study was to describe the behavior and institutional support for the success of rice farming in the tidal swamps of Riau Province. The study was conducted at the rice production center in Siak Regency using a survey method with a structured questionnaire. A total of 203 farmers were purposively selected as random samples in four districts, namely Bunga Raya, Sungai Apit, Sabak Auh and Sungai Mandau. The observation parameters were education, training, age, motivation farming, land tenure and experience in agriculture. The collected data tabulated and analyzed descriptively. The results showed that agriculture in Bunga Raya was more sustainable compared to other sub-districts with index value of social and cultural dimensions (> 50%) and the value of the legal and institutional dimension sustainability index to be 53.9%. The factors that influence the sustainability of the swamp rice farming in Siak Regency were good farmer behavior (age, education, motivation, experienced and landowner status), the existence of supporting institutions peculiarly farming group and BPP that synergize well and government regulations in favor of agricultural development and their sustainability.
Addressing the challenges of Global Sulphur Cap 2020: case study Indonesian tanker shipping
Authors: Nugroho S , Lazuardi S D , Faida E E N , Mustakim A , Yunianto I T , Buana I G N S
Published: February 2021

Global Sulphur Cap 2020 (GSC 2020) is a policy that regulates the limitation of sulphur content in ship fuel to meet the global standard of 0.5% starting on January 1st, 2020. This new regulation creates new challenges faced by shipping companies, in particular those which operate ageing ships or operating ships in the so-called Environmental Control Areas (ECA). Five technological options to encompass the GSC 2020 issues are deploying one of three scrubber systems, or switching to environmentally friendlier fuels, i.e. MGO or LNG. The paper outlines a case study of an Indonesian shipping company operating eleven ships, nine tankers and two container ships, with an age between two and 29 years of age. The Multi-Attribute Utility Theory is deployed to provide a recommendation on the best option.
Modular system construction for laminated wooden fishing vessel industry
Authors: Pribadi T W , Arif M S , Wahidi S I , Maditiara I W
Published: February 2021

The shipping of the fishing boat is expensive and time-consuming, due to the long distance between the shipyard and the fishermen locations. The main objective of this study was conducted to analyze the technical and economic aspects of the traditional fishing vessel building using the modular system construction on laminated Mahogany and Teak woods. Mahogany has the potential as an alternative raw material for wooden fishing boat because it is a fast-growth plant with the harvesting period of 15 to 20 years. The technical analysis was performed by building a prototype with a modular system construction of fishing boat with laminated wood materials. Firstly, survey was conducted to get the main dimension and design the lines plan of the existing boat. The structure of modules is made using the cold press planking method. Economic analysis is done by determining the building cost of fishing vessels with laminated wood construction using a modular system and calculating the investment of a 3 GT boat with laminated wood construction. Based on the prototype of the fishing vessel that has been built, it can be concluded that the price of a Mahogany and Teak laminate ship with a modular system is IDR 44.927.656 (USD 3,160) in comparison to the general price of IDR 30,000,000 (USD 2,110). Note the less, it can be concluded that the investment in fishing shipyard for laminated wood construction using a modular system is feasible both from technical and economic aspects.
Households electricity consumption patterns in small island – case study: Kepulauan Seribu regency, DKI Jakarta
Authors: Pratiwi W N , Nurlambang T , Susilowati M H D
Published: February 2021

Kepulauan Seribu is an area off the north coast of Jakarta consisting a relatively large number of small islands. Development of the electricity system here is planned to interconnect among islands. These developments tend to consider more on the supply and not much on the demand of each household. The difference in functions of each island is expected that in the future, planning to increase electricity transmission can be more focused on the pattern of needs as reflected in the consumption patterns and household characteristics. Therefore, this study was aimed to determine the pattern of household electricity consumption based on differences in the island function, and to find out the relationship between household characteristics and that patterns. The characteristics include household income, house building area, number of household members, and building functions. The variables in this study were analyzed using the descriptive spatial analysis and chi-square test. The results of the study showed that the electricity consumption pattern on the island which function in the tourism category was higher than the one in the non-tourism category. The results of statistical tests showed that both of an island tourism categories and non-tourism category the function of the household building has a relationship with electricity consumption.
Potential areas for the development of renewable energy system in Kepulauan Seribu: a case study for households in Pari Island, Tidung Island, and Pramuka Island
Authors: Khoirunnisa V , Nurlambang T , Susilowati M H
Published: February 2021

Kepulauan Seribu is a group of islands in the Java Sea where electricity source uses submarine cables that that can be damaged of damage the marine ecosystem. Whereas the government decides the Kepulauan Seribu region to be a Special Economic Zone that requires a strong electricity condition and sufficient electricity supply. Households as economic drivers have very high electricity consumption compared to other sectors in Kepulauan Seribu. The aim of this study was to analyze the potential areas for developing renewable energy systems that are appropriate for regions with high levels of electricity consumption. The method used in this study is Multi-Criteria Decission Making (MCDM) with an Analytical Hierarchy Procesess (AHP) weighting technique. The result shows that renewable energy that potentially developed in Kepulauan Seribu is Solar Energy whereas wind energy offshore has a low potential. The findings show that solar energy has high potential to be developed in the Kepulauan Seribu region. Meanwhile offshore wind energy has low potential to be developed in Kepulauan Seribu. The energy that can be generated by the PV system on Tidung Island is 108,505 kWh/m2/day, Par i Island is 66,976 kWh/m2/day, and Pramuka Island is 18,845 kWh/m2/day/day.
Potential areas for the development of renewable energy system in Kepulauan Seribu Regency: case study for tourism sector in Putri Island and Ayer Island
Authors: Kamilah N , Nurlambang T , Susilowati M H
Published: February 2021

Kepulauan Seribu Regency is one of the priorities of tourism development areas in Indonesia which triggers an increase in electricity demand as one of the primary needs of tourism activities. The existing condition of energy fulfillment for resort islands is diesel power plants (standalone). Meanwhile, renewable energy sources can be used as energy source in Kepulauan Seribu Regency. The purpose of this study is to find out the potential of energy that can be produced by renewable energy system based on the area suitability of communal photovoltaic and offshore wind turbine using Spatial Multi Criteria Analysis method. The results indicate–that based on the mapping of the suitability area, the renewable energy system that has the potential to be developed on Putri Island and Ayer Island is a communal photovoltaic system, while the wind turbine system is not suitable for both islands. The study concluded that the potential energy that can be generated by Photovoltaic system is found greater in Putri Island which is located in the North Kepulauan Seribu if it is compared to Ayer Island which is located in the South Kepulauan Seribu.
Risk analysis of milkfish supply chains in Semarang using house of risk approach to increase the supply chain resilience
Authors: Purwaningsih R , Hermawan F A
Published: February 2021

This research aims to identify, measure and analyse the operational risk in supply chain of milkfish at Semarang. The supply chain activities emphasize on cooperation between parties to reduce risks in all stage of supply chain. Risk event occur are the return of fish to suppliers due to the poor quality, damaged product during the production process, and customer complaints due to improper order services. These problems result on out of stock of fresh fish, low customer satisfaction, and financial loss for the fish processing industries and distributors. Therefore, it is important to identify, measure and analyse the risks that probably occur in the supply chain from harvest area to end customer. The house of risk method used to analyse the supply chain risk and Supply Chain Operation Reference (SCOR) approach used to divided the business process into 5 main processes i.e., plan, source, make, deliver and return. The data collection was done by deep interview and spread questionnaires to industries manager and staff. The risk identification result shows that 7 risk events occur in the production process and 8 risk events in delivery process. These two processes have highest risk event number. The highest risk severity is found on Chlorine contaminated products. Based on severity value, some recommendation was formulated to reduce the impact of occurred risks to increase the supply chain resilience.
Nutrition analysis of milkfish processed in Keputih Timur, Surabaya
Authors: Rosyidah A , Setyaningsih E P , Murwani I K , Ediati R , Romadiansyah T Q
Published: February 2021

Keputih Timur, Sukolilo District, East Surabaya have ponds with the total area of 1,278 ha make Keputih Timur as one of the conservation areas. Keputih Timur was located in the city of Surabaya with a location adjacent to the Madura Strait. There are many ponds in this area that have a great opportunity to be developed into an organic milkfish producer area. The products of these ponds were very beneficial for the surrounding community as income land and great source of nutrition. This research-based community service activity have increased the community income through diversification of pond processed products. The processing technology was frozen processed products with raw materials of milkfish and seaweed to improve nutrition content in milkfish.
Deacidification of rice bran oil using a deep eutectic solvent
Authors: Jannah A , Maulita F , Zullaikah S , Rachmaniah O , Rachimoellah M , Ju Y H
Published: February 2021

The liquid-liquid extraction (LLE) will be applied in this study using a deep eutectic solvent (DES) of choline chloride and ethylene glycol with a 1:2 molar ratio. The LLE process will compare the results of removing free fatty acids (FFAs) between single and multiple extractions. Rice bran oil (RBO) with various initial FFAs contents (5%, 10%, 20%, 30%, 40%, and 60%, w/w) and γ -oryzanol (2%, w/w) are used in this study. Deacidification is carried out by mixing RBO with a certain level of FFAs and γ -oryzanol, a volume ratio of RBO: solvent (DES) = 1:2, and total extraction time in multiple LLE was 1200 min. (240 min./stage x 5 stage). It was obtained that the removal of FFAs in the single LLE are 10.04%, 23.28%, 13.43%, 17.55%, and 17.49%, respectively, while in the multiple LLE are 48.64%, 60.37%, 63.13%, 63.15%, and 41.79%, respectively, for RBO with an initial FFAs content of 5%, 10%, 20%, 30%, 40% and 60%, respectively. The losses of γ-oryzanol in the single LLE are 48.32%, 61.26%, 73.32%, 74.22%, and 89.59%, respectively, while in the multiple LLE are 87.16%, 95.58%, 99.14%, 99.77%, and 99.77%, respectively, for RBO with an initial FFAs content of 5%, 10%, 20%, 30%, 40% and 60%, respectively. Deacidification of RBO using DES in the multiple LLE removed FFAs 3.63 times higher than that in the single LLE. However, the losses of γ-oryzanol increased in the multiple LLE which is 1.43 times higher than that in the single LLE.
Integration of an independent e-ticketing system into a common e-ticketing platform in ferry services
Authors: Luhur M A , Nugroho S , Kurt R E , Achmadi T
Published: February 2021

The demand for mobility has evolved with increasing globalization. Multimodal passenger transport has grown steeply. The ease of obtaining information on the schedule, making a ticket reservation, and making a payment is obvious. This method of e-ticketing is also more cost-efficient, simple and practical, compared to conventional ticketing system with a hardcopy ticket. Nearly all transport providers have been providing an e-ticketing service, both independently and integrated in a multimodal e-ticketing platform. This paper outlines a study on the integration of e-ticketing system of a ferry operator, and an effort to integrate it into a common e-ticketing platform. The finding shows that the biggest challenge of entering into an e-ticketing system and integrating it into an e-commerce, i.e. common e-ticketing platform lies in the core of ship operations, namely the necessity to have an access on a real-time and reliable ship scheduling.
Transport telematic architecture of an electronic payment system for traditional merchant shipping
Authors: Tetuko F , Nugroho S , Tezdogan T , Djatmiko E B , Buana I G N S
Published: February 2021

Wooden boats operating throughout an archipelagic country play an important role in connecting in particular remote areas and small islands. Those boats are deployed by traditional merchant shipping, also known as Pelra, abbreviated from Pelayaran Rakyat meaning Pelople’s Shipping. They carry nearly all types of cargoes, and usually a family business. Efforts to alleviate its role are necessary, from various aspects. The duration of shipments of cargo by using Pelra ships is long, the impacts on the cashflow of many parties are immediately afected. The growth of internet usage open a window of opportunity to improve this situation, by introducing e-Payment system. This paper outlines this effort by applying the Intelligent Transpotation System (ITS) architecture. A Pelra route Surabaya-Bima serves a case study to investigate the viability of the e-payment. The study concludes that introduction of an e-payment system is promising.
Design of Lighter Aboard Ship (LASH) for distribution of goods in small islands: case study of Kangean archipelago
Authors: Awwalin R , Nugroho S , Achmadi T
Published: February 2021

A ship is an important means of transportation for archipelagic countries such as in Indonesia. The development of ship technology in the world has shown a rapid progress, where various innovations have been made in the effort to ease and accelerate the sea transportation system. These are ranging from the design of ships, cargo and logistics handling systems, and enhancement of regulations related to ship safety. Lighter Aboard Ship (LASH) is an innovation of ship type that has the concept as a ship loading lighter barges. This ship is designed to reduce waiting times at the port and reduce the use of port docks, so that it is highly suitable to serve the small islands where adequate port facilities are typically not available. The aim of the study is to design a LASH that will be used as a means of transportation of goods in the Kangean Archipelago. This is a group of small islands located in the easternmost of Sumenep District with a total population of 192,807 people forecasted by 2019. The LASH vessel size is determined by using the optimization with linear programing. The initial stages are the definition of owner requirements, which include primarily the cargo load capacity and ship speed. The design in turn provides the main dimensions of the LASH, namely the Length Over All (LOA) of 48.71 m, breadth moulded (Bmld) 10.43 m, and deck height moulded (Hmld) 4.09 m.
Design and analysis of Trimaran feeder ships as a connector for small islands in the Maluku
Authors: Luhulima R B , Gaspersz F , Sutiyo  , Utama I K A P
Published: February 2021

Maluku waters have limited seas, which are still categorized as calm seas because the wave height is about 1.0 meter. The existence of feeder ships for transportation services from and to areas that are still considered remote, outermost and border will behave more smoothly in operation. The selection of three-body vessel (Trimaran) has the advantage of having a large deck area so that it can function as a feeder between small islands effectively and efficiently. This paper focuses on analysing resistance and seakeeping of Trimaran vessel for limited seas using CFD techniques with variations in transverse distance S/L = 0.2, 0.3, 0.4, 0.5 and at a speed designated by the Froude number Fr = 0.21. The results of numerical analysis show that at S/L = 0.4 the vessel has very good characteristics in resistance and seakeeping. Therefore, results of the calculation can be adopted as preliminary data for the preliminary design.
Design of autopilot control system on unmanned surface vehicle type monohull LSS-01 using model reference adaptive control-state feedback in waypoint control
Authors: Rahmasari F , Kadir R E A , Gamayanti N , Santoso A , Bilfaqih Y , Agustinah T
Published: February 2021

For unmanned surface vehicle to run automatically, algorithms of the autopilot system and waypoint navigation are needed. The autopilot system is an unmanned surface vehicle control towards the waypoint. One example of a navigation algorithm is the desired waypoint, it requires control of the ship's steering angle, namely thrust and turning angle. Unmanned surface vehicle can encounter external interference while advancing, such as waves, wind, and ocean currents. It is desirable, therefore, to unmanned surface vehicle to be able of adapting these conditions. One way to overcome this interference is to design adaptive controllers such as the Model Reference Adaptive Control (MRAC) - state feedback to regulate the behavior of unmanned surface vehicle plants. In this respect a reference to the desired model is required for the MRAC-state feedback controller. Using this method, it is expected that unmanned surface vehicle can move accurately from the expected waypoint. The MRAC-state feedback controller can produce an angle response of unmanned surface vehicle and speed on the surge axis according to the desired design criteria. From the simulation carried out the adaptive gain that is suitable for LSS01 unmanned surface vehicle is 0.0001. The results of simulation on the ship headed waypoint cross-track show RMS error when uninterrupted is 0.0846 and when given a disturbance is 0.2969.
2D Image-based higher-order meshing for 3D modelling in MATLAB
Authors: Smitha T V , Madhura S , Brundha R
Published: February 2021

We present a higher-order meshing technique to 3D modelling applications from 2D images. This method uses 2D images that are converted to 3D stereolithography files on which tetrahedral meshes of higher order are developed. The resulting 3D meshed structures find several applications in Computational fluid dynamics and finite element analysis problems. The generateMesh is the initial mesh used by the presented mesh generator, which is a MATLAB function from the PDE Toolbox. The required inputs for the mesh generator are stereolithography file and mesh edge length upper bound of the 3D structure. A higher-order tetrahedral mesh, connectivity matrix, node coordinates, and nodes lying on the border are the results we get from the presented work. For many finite element analysis problems, the outcomes obtained from the presented mesh generator can be used very efficiently to enhance the numerical results. In medical simulation, photogrammetric fields, material engineering, computational materials science, computational electromagnetics, etc., this method can be used.
A105 Work-Material Turning Experimentation using L9 Orthogonal Array Runs with Dry, MQL and Nano-Al2O3 Assisted MQL Machining Conditions
Authors: Shaikh Shehzad , Shaikh Vasim A , VeeraBhadra Rao M , Patil Bhushan T
Published: February 2021

A105 carbon structural steel material exhibits high strength and hence pose machining difficulties such as excessive tool wear due to high cutting temperatures. Abrupt cutting actions due to improper selection of feed rates have posed to bad surface finish of work-pieces. These materials find best applications in flanges and pipe fittings and generally turning operations are conventional methods to change its dimensions and attaining accuracy levels. An attempt is made to experiment on A105 work material using lubricant vegetable coconut oil under minimum quantity lubrication ( MQL) assisted by nano-particles such as Al2O3
in order to find suitable combinations of working environments, to compare with dry cutting, and also to decide suitable feed rates and cutting speeds combinations.
Evaluation of Internal Forces and Support Reaction of Column and Shearwall in 15th Building Design
Authors: Wiyono D R , Milyardi R , Pranata Y A
Published: February 2021

In the case of 15th building, the structure type to earthquake resistant code is dual system reinforced concrete consists of frame and shear wall. The structure is analysis by dynamic analysis for whole structure and compare base shear by static analysis. By several trial position of shear wall can give first and second mode is translation and the third mode is rotation. In this case planar shear wall is used and placed in two direction of axis. The category of structural system is Other Structure for calculation of fundamental period (T). Fundamental Period (T) of structure is more than T maximum, so value of static seismic coefficient (Cs) taken from T maximum. Each of important element is column where the dimension and reinforcement are must satisfied for requirements. Shear wall have joint together with others shear wall, so one node used by several shear wall, make duplication forces in support reaction. For foundation design we can used 1st story internal forces in finding forces and compare them with after correction of support reaction caused duplication node in used with several shear walls. This exercise could solve the problem to anticipate duplication forces in several planar shear wall using one foundation assembly from several shear walls. The results of preliminary design column based on axial forces is 23,12 % lower than internal forces. From preliminary design based on axial forces. The dimension of preliminary design columns are lower than ideal dimension with 3 % reinforcement ratio. The result of difference between internal forces columns and support reaction columns is 12,99 %. The result of difference between internal forces shear walls and support reaction shear wall is 0,80 %.
Formulation and Physical Stability Test of Facial Gel Wash Dragon Fruit (hylocereus polyrhizus) Peel Extract
Authors: Yuniarsih N , Lenterani I , Farhamzah
Published: February 2021

Cosmetics are a necessity in everyday life. Cosmetics are divided into two types, namely cosmetics for care (skincare) and decorative cosmetics (make-up). The facial wash is a form of cosmetic care to clean the face which can be in the form of foam, cream, and gel. Gel is a preparation that has good distribution, the good release of active substances, and is easily washed with water. This research is to formulate dragon fruit peel (Hylocereus polyrhizus) into a facial gel wash. Dragon fruit peel is a waste that is often ignored by the community. The dragon fruit peel was extracted and then made a facial gel wash formulation with three formulas, namely 8%, 9%, and 10% followed by physical stability testing. This study aims to formulate and determine the physical stability of the facial gel wash formulation of dragon fruit peel extract stored at three different temperatures, at room temperature, under the sun, and 40°C. The stability of the preparation was seen based on the results of organoleptic testing, pH, viscosity, and accelerated foaming before and after storage. The results of the physical stability test were statistically processed using the One Way ANOVA method. The results of this study showed that the three formulas, especially formula 1, were more stable at room temperature, under the sun, and 40°C.
Neural Collaborative For Music Recommendation System
Authors: Girsang Abba Suganda , Wibowo Antoni , Jason  , Roslynlia
Published: February 2021

In music there are various types of genres and every person has their own choice of the type of music they want to hear. Recommendation system is an important feature in an application, especially with the large number of choices for a particular item. With a good recommendation system, users will be helped by the suggestions given and can improve the user experience of the application. It is better provided by using collaborative filtering (CF) approach by recommending products related to one’s preferences history. However, CF approach still lacking in integrating complex users data. Therefore, hybrid technique could be the solution to polish the CF approach. Combining neural network and CF also called NCF thought to be better than CF alone. This study focuses on collaborative filtering approach combined with neural network or called neural collaborative filtering. In this study, we use 20,000 users, 6,000 songs, and 470,000 transaction ratings then predict the score using CF and NCF approach. The aim of this study is to differentiate recommendation systems with the use of CF alone and NCF. Through this research, it was found that NCF is better than user-based collaborative filtering in gather those playlist they really want to hear, but requires more time to build it.
Systematics Review on the Application of Social Media Analytics for Detecting Radical and Extremist Group
Authors: Adek R T , Bustami  , Ula M
Published: February 2021

Recently, social media platforms such as Twitter, Tumblr, Facebook, YouTube, blogs and discussion forums are being mistreated by radical groups to promote their ideologies and encourage radicalization. Social medias also have been used to create online extremist community and recruit new followers. In this paper work, the authors conduct a schematics literatures review on all available techniques and perform a comprehensive analysis on the application of social media analytic for detecting radical group to understand the circumstances, trends and its gaps. Further, the author provides the characterization, classification and meta-analysis in order to achieve a better understanding of the literature on the extremist detection through intelligent social media. It is found that for over the last 10 years many researchers have been conduct deep investigation on the use of social media analytics on predicting and identifying online radicalization. Besides, data source, features, geolocation, language, machine learning techniques, and tools have been applied on the recent literatures to detect those cyber-extremist activists. This paper also highlighting the performance measurement methods that have been used by researcher for detecting extremist group and radical communities. The goal of this research is to provide an academic base for ongoing research in the developing machine learning algorithm for detecting extremist and radical contents in social medias.
A simple online tool condition monitoring system using artificial neural networks
Authors: Mukherjee A , Das S
Published: February 2021

During machining occurrence of tool wear is a common phenomenon. As tool wear increases, rubbing of flank surface and workpiece also gets increased. Then, the desired quality of workpiece is not possible to achieve. To minimize this loss of quality, a cutting tool should be changed or ground after reaching certain amount of average flank wear (0.3 mm for uniform and 0.6 mm or non-uniform flank wear). For the detection of worn out state of a cutting tool, condition monitoring is required. During past decades, a lot of research works had been done on both offline and online monitoring of cutting tool. Most of the researchers used high cost setups and sensors for wear detection purpose. In this work, tool wear is detected using spindle speed as the wear detection parameter. Artificial Neural Networks is used as data analysing tool. Back propagation algorithm is used as learning algorithm. Results show that proposed methodology is capable to detect tool wear satisfactorily.
Computational analysis of heat transfer due to turbulent annular jet impingement
Authors: Dutta Prasun , Chattopadhyay Himadri
Published: February 2021

Present paper deals with the numerical study of fluid flow and heat transfer due to an annular turbulent jet impingement on a flat heated plate. The geometrical configurations of annular jet was selected such a way that the mass and momentums efflux at the annular jet exit will be same as a circular jet having same inner diameter at a particular Reynolds number. Three dimensional turbulent flow field was resolved using Transition SST Model by solving the mass, momentum and energy equation with SIMPLE algorithm. A highly refined mesh was used for numerical computation after validation of present model with established results of same geometrical configuration. The flow structure and heat transfer characteristic of the annular jet was compared with the conventional circular jet and also with an established two dimensional study of same configurations and reported in this paper. It was observed that that two dimensional studies on annular jet under predicts heat transfer characteristics.
Flakner-Skan equation flow of Newtonian fluid past a moving wedge with suction/injection
Authors: Ghosh Abeetath , Mondal Nitesh
Published: February 2021

In this study, numerically analysed the Falkner-Skan equation in the two-dimensional laminar flow past a moveable wedge for a Newtonian fluid with suction/injection is investigated through Matlab environment. The boundary conditions are scrutinized and applied in this equation for different conditions. The simultaneous effect of the parameter which used to measure the pressure gradient along x-axis (β), velocity ratio between the wedge and mainstream (λ), suction and injection are inspected on the momentum boundary layer thickness or dimensionless velocity profile.
Multiphase dynamics in a three dimensional branching network
Authors: Ghosh Agnivo , Sen Daipayan , Manna Nirmal Kumar , Sarkar Sandip
Published: February 2021

The article aims at understanding the complex unsteady fluid dynamics in six generations of a human bronchial tree, which comprises of 63 straight sections and 31 bifurcation modules in a complete breathing cycle. The effects of 3-D arrangement on oscillatory flow is analyzed. Unsteady effects are maximum during the shift of expiration to inspiration and vice versa. It is also observed that the symmetry of the flow in cased of fully developed flow is destroyed due to unsteady effects. The flow division at the bifurcations causes a large asymmetry in the flow field during the inspiration than during the expiration process at the same cross-sections, thus displaying irreversibility of fluid dynamics. The second part of the study is aimed at analyzing the multiphase fluid dynamics inside a six generation bronchial tree for the case of an active smoker. Both the velocity magnitude contours and volume fractions of air and smoke is analyzed and it is observed that the general symmetry of the flow in the main two halves of the branching network is lost due to the interaction of smoke and air in the branches during inhalation and exhalation. It is also observed that higher mass of smoke is accumulated within the daughter branches which are at a lesser angular deviation with the trachea, whereas the branches at the extreme ends have little to no smoke deposit. This phenomenon can be attributed to the high smoke particulate density compared to that of air.
Enhanced Transport under Annular Jet by Introducing Rib
Authors: Pal Tarun Kanti , Chattopadhyay Himadri , Mandal Dipak Kumar
Published: February 2021

This work concern studies for the transport enhancement of impinging annular jets. The ribs are introduced on the impingement surface and higher heat transfer could be obtained using rib compared to plane surface. Comparison is made with circular jet to predict the enhancement of heat transport for same Reynolds number and mass and momentum efflux at jet outlet. The model used for solving the problem is Shear Stress Transport (SST) model, while the Reynolds numbers of jet varies from 100 to 50000. Square rib is used in this study. This study reveals that the ribs will increase the heat transfer for both circular and annular jets. Annular jet provides 20–30% lower heat transfer than that of the circular jet.
Calculation of the triangular panels’ orthotropic covers for the retained domes
Authors: Skuratov S V , Samsonova V N
Published: February 2021

The experience of design and construction of single-mesh spherical dome coverings based on meshes with triangular cells was studied. Constructive solutions of wooden domes made of triangular panels with orthotropic plywood covers are considered. The method analysis for constructing a bar model of an orthotropic plate in the form of an oblique triangle has been carried out. It is proposed to reduce the calculation of the triangular dome panel’s rod-sheet structure to the calculation of the hinge-bar system. The stiffness matrices of the contour and intra-contour rods of the super cell are obtained.
Investigation of the volumetric fractal structure shaping
Authors: Kravchenko G M , Pudanova L I
Published: February 2021

On the basis of a specially developed algorithm, shaping of the fractal structures, the formation of which is regulated by the power index of the fractal, has been carried out. A sphere and an ellipsoid were used as the basic shapes. The formation analysis has made it possible to determine the characteristic principles of the fractal structure growth. The performed numerical experiment with respect to volumetric fractal structures of power 8 made it possible to determine the spectrum of frequencies and forms of natural oscillations. The offered objects of fractal architecture are analogs of unique high-rise and large-span buildings and structures. The application of the fractal shaping paradigm in combination with digital technologies and innovative materials will make it possible to create completely new objects of architecture.
Algorithmic method for modeling a parametric surface
Authors: Kravchenko G M , Trufanova E V
Published: February 2021

The article discusses the peculiarity and relevance of the buildings and structures design using the latest computing technologies and digital modeling methods, which give a possibility to change the shape of a parametric architectural object. The formation and evolution of the surface of the crossed cap obtained from the Mobius strip is investigated. The key features of parametric modeling and the possibility of using this direction in the unique buildings and structures’ design are considered. Recommendations for choosing a rational form of an object based on the frame dynamic characteristics’ analysis and comparison are given. Visualization of the completed building of the sports and entertainment complex emphasizes the aesthetic component of parametric architecture.
Housing construction design taking into account dust content index of climate in the Russian Federation
Authors: Zakieva N I , Lapina A P , Aleksandrov A P , Kulikov A S , Zheleznyakov V A
Published: February 2021

The article deals with the residential buildings’ design taking into account the dust content of dry climate. At the same time, such certain principles of designing buildings and structures in special conditions should be taken into account as : orientation to the cardinal points, wind direction, the amount of solar energy, the number and size of windows, wall thickness, roof slope, etc.
The aggregation method of inhibiting factors in construction
Authors: Alekseev A O , Gladkikh V S , Aftahova U V , Aftahov A G , Takhumova O V
Published: February 2021

The article presents a new methodology for the complex assessment of factors that restrict working conditions, which is based on matrix mechanisms of complex assessment, allowing to take into account heterogeneous complexity factors. As criteria for determining the cramped working conditions, the following are used: the mass and dimensions of the inventory, their number and the complexity of work to prepare the workplace for construction and installation work. The presented approach is able to take into account any factors‘ combination, which makes it possible to abandon the existing fixed number of coefficients. Illustrated examples are shown and that clearly demonstrates the methodology for assessing the complexity of construction and installation work. The proposed method can be used in the management of construction projects, to adjust the cost of work, etc. The screen forms of the software module created specifically to provide a comprehensive assessment of complexity factors are demonstrated.
Organizational and technological approaches to the construction and technical expertise of cultural heritage sites
Authors: Zilberova I Yu , Novoselova I V , Mohsen AL-Fatla Tareq Neamah
Published: February 2021

Construction and technical expertise plays an important role in the preservation of cultural heritage sites. Based on the data obtained in the course of construction and technical studies the technical condition of cultural heritage objects or their parts is determined as well as the possibility and methods of carrying out repair and restoration work. Construction and technical expertise of cultural heritage sites allows for control ensuring the prevention of damage, destruction, reshape or complete destruction of historical and cultural monuments. The special feature existence of such objects determines a special order and approaches to conducting construction and technical research attached to them.
The Internet of Things in Transport Technology Improvement and Project Learning
Authors: Nikolayev N N
Published: February 2021

A fairly new field of science and technology - the Internet of Things (IoT) and Industrial Internet of Things (IIoT) are considered in relation to the development and digital transformation of the transport industry and higher education. At the same time, the influence of this technology on both transport processes and transport education is presented. An example of the industrial Internet of things use in the development of a package product ‘smart container-transformer‘ and an exhibition complex for presenting this product is given. The means and results of the project-based learning implementation based on the Internet of Things in the course of teaching the discipline ‘Transport systems‘ among graduate students are presented.
The vibrations of a nonlinear, absorbing soil ground calculation by the method of the seismic microzoning multiple-reflected waves
Authors: Zaalishvili V B
Published: February 2021

A nonlinear version of the program ZOND (nonlinear) has been developed based on the dependence of the shear and absorption modulus values on the seismic impact intensity, as well as on the introduction of ratios for calculating various indicators of soil movement (normal stress, deformation, etc.). The program algorithm is based on the multiple-reflected waves theory. An accelerogram of an earthquake, recorded on a rocky ground in Japan with earthquake characteristics similar to those for the territory of Tbilisi (magnitude, epicentral distance, spectral features, etc.), was chosen as an accelerogram set into the bedrock from the generated strong motion database AGESAS. The results of linear and nonlinear calculations with and without absorption are presented. It is clearly seen that with an increase in the intensity of the impact, the nonlinearity manifestation increases. At the same time, absorption increases. In this regard, the resulting movement at very high levels of impact may be below the initial level. This corresponds to the facts known from the analysis of the consequences of strong earthquakes that have occurred in recent years.
Innovative solutions to improve the purification method of chromium-containing waste water
Authors: Ignatkina D O , Batmanov V P , Belogorodskaya M Y , Gizzatova G L
Published: February 2021

The research results showed that the problem of resource saving during the chromium electroplating from standard electrolyte can be solved. Formulated requirements that ensure the implementation of the set tasks without costs for new equipment and chemical reagents. It has been proved that organic compounds of a certain structure introduced into the electrolyte influence the chromium electroplating in such a way that all technological characteristics, coating properties, physical and chemical characteristics of the solution change. The chrome plating process has been optimized using the experimental mathematical planning method, which made it possible to develop methods for obtaining chrome coatings protected by security documents on the basis of experimental data. All the proposed methods allow solving the problem of resource saving and environmental safety. The authors have consistently studied resource-saving and environmental indicators. In galvanic chromium plating technology, resource-saving indicators are: energy intensity; metal intensity; water intensity; and labour intensity. Environmental indicators: industrial emissions: gas emissions, waste water; occupational diseases.
Statistical estimation of the effect of precipitation redistribution using the historical regression method
Authors: Gekkieva S O , Sherkhov A H
Published: February 2021

Precipitation has significant natural variations in time and space. The calculation of the probability of increasing or decreasing the amount of precipitation against the background of their natural variability as a result of work on active influences is not an easy task. A statistical assessment of the effect of the redistribution of precipitation in the protected and control areas was carried out using the historical regression method.
Aeroelastic deformation measurement of Martian airplane for high-altitude flight experiment using stereophotogrammetry
Authors: Hiramatsu Shuichi , Anyoji Masayuki , Fujita Koji , Nagai Hiroki , Oyama Akira , Kato Hiroyuki
Published: February 2021

A fixed-wing aircraft called Mars Airplane Balloon Experiment −2 (MABE2) developed by the authors was the subject of high-altitude flight demonstration test in this paper, which can simulate the near-actual environment of a Martian atmospheric flight. Although the flight condition is in the low-Reynolds-number region due to low density at high altitude, the wing suffers from aeroelastic deformation given the relatively high dynamic pressure load in the pull-up phase. Stereophotogrammetry was applied in the 6.5 m × 5.5 m low-speed wind tunnel at the Japan Aerospace Exploration Agency (JAXA), aiming to optically measure MABE2’s aeroelastic deformation under dynamic pressure loads equivalent to high-altitude flight test, with the MABE2’s reinforced structural strength. The results of the accuracy test indicated that stereophotogrammetry measures aeroelastic deformation at high accuracy of ±0.1 mm around the image center and ±0.3 mm around the edge. A slight deflection of up to 4 mm was observed on the main wing, whereas both the main and tail wings were hardly twisted. Compared with flight-simulation-assumed errors, these deformations are extremely small and have a negligible effect on the high-altitude flight test. The study results confirmed the practicality and efficiency of this optical measurement technique in aeroelastic deformation measurement for a real light aircraft.