bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigating the Level of Radon 222Rn and Radium 226Ra in Soil Samples Taken From Al-Amarah in the South of Iraq
Authors: Atiah Al-zahy Younis M , Mzahiwat Murtadha 
Published: April 2021

Abstract
Radon (222Rn) is created in the soil by radioactive decay of Radium (226Ra) and then emitted from the ground into the atmosphere (exhalation), environmental assessments of radon gas (222Rn) are keys to the assessment of air pollution. The major objective of the current study was to examine the (222Rn) exhalation rates and the (226Ra) concentrations in the soil samples. Thirty soil samples have been collected from ten streets in the region. The (222Rn) exhalation rate and concentrations of (226Ra) in soil samples were calculated using “Can Technique”. The measurements have shown that the surface and mass exhalation rate were varied from 3.9∓0.3 to 18.3∓0.3 μBq.kg−1.s −1, with a mean value of 7.8∓0.3 μBq.kg−1.s−1, and 12.9∓0.5 to 60.7∓1 μBq.m−2.s−1, with a mean value of 25.5∓0.9 μBq.m−2.s−1, respectively. In addition, the results showed that the values for 226Ra concentrations ranged from 1.8∓0.04 to 8.7∓0.1 Bq.kg−1, with a mean value of 3.7∓0.1 Bq.kg−1. Overall, the indications showed that the levels of (226Ra) in soil samples are less than the hazardous levels of human health 370 Bq.kg−1.
A mobile learning application for Malaysian sign language education
Authors: Siong T J , Nasir N R M , Salleh F H M 
Published: April 2021

Abstract
Malaysian Sign language is the primary means of communication among the deaf-mute community in Malaysia for many years since it was first created in 1998 when the Malaysian Federation of Deaf was first established. Although Malaysian Sign Language is widely used among the deaf-mute community, hearing individuals often have little or no exposure to the usage of sign language due to the lack of pervasive environment for the usage of sign language. There is also a lack of effective mobile learning application that encourages and facilitates the learning of sign language. This creates a communication gap among the deaf-mute community and the hearing individuals. The objective of the project is to design a mobile application that can facilitate the learning of sign language and ultimately bridging the gap between deaf-mute communities and hearing individuals. A survey was carried out to elicit the requirements of potential users. The sample population was drawn from Bahasa Isyarat Malaysia (BIMMFD) Facebook group and Universiti Tenaga Nasional (UNITEN) students. The questionnaire consists of multiple-choice questions, open-ended question and dichotomous questions which can be logically divided into demographic questions, questions on the experience of a participant on sign language, preferred learning methods and the preferred features of the application. The findings show that there is a need for an effective and interactive mobile application for learning sign language. Most of the respondents agreed that video tutorials are their preferred learning method as it is more dynamic than learning via images or books. A majority of the respondents also have no experience in using a sign language learning application due to the lack of availability on the market. Moreover, most of the participants also show interest in using a mobile application in learning Malaysian Sign Language. Some respondents also requested the feature of a built-in dictionary. Thus, the findings validate that SLEM has its demand and potential to provide a more accessible and user-friendly means to learn Malaysian Sign Language. The application has the potential to be commercialized to industries and communities such as sign language learning institutions, the public and individuals who are related to deaf or verbally challenged individuals. This paper provides directions and guidance for further development of this educational mobile application.
PARKEY : ticket-less parking system using license plate recognition approach
Authors: Kamaruzaman M A M B , Nasir Naziffa Raha Md 
Published: April 2021

Abstract
As of recent practice, the majority of current parking systems are still implementing the same traditional method of giving entry to parking visitors which is by giving out a physical ticket. This has caused several problems for mall visitors. Therefore, it is planned to propose a system that can eliminate the problems and provide further improvement to the current systems. Our proposed system named PARKEY is a Ticket-less Parking System that has been designed to provide a new method of parking entry and exiting while implementing new features in the parking system. The objective of the project is to provide a working ticket-less entry and exit system by using a virtual ticket with the help of image recognition technology. With the proposed system being developed, it will help to solve problems that are present in the current systems and give an implementation of a parking system that is up to par with the current standard of technology. Before the system was developed, interviews, observation, and requirement reuse were used as methods to elicit requirements that will provide useful insights for the development of the system. Before the system was developed, interviews, observation, and requirement reuse were used as methods to elicit requirements that will provide useful insights for the development of the system. This includes providing questions to users, making observations to current systems deployed, and studying existing systems ranging from older systems to newer, similar systems. Using the stated elicitation techniques, some findings were gathered and are beneficial to the development of the system. The use of observation to current parking systems helps provides data that will be used as a benchmark for the proposed system to identify how quick the proposed system reaction time should be to provide an on-par performance with the current systems. Interviews with several potential users were done to gather information on their experience from the current parking systems and their opinions on what can be improved and expectations of the proposed system. Other than that, studying the currently available systems gives a better understanding of the drawbacks and limitations of the current systems and provides some functionalities from those systems that can be combined and implemented to benefit the proposed system’s improvement during development. The developed proposed system applies a combined usage of a web application, license plate recognition technology, and an e-wallet based payment system to tackle current parking system problems.
Properties of corrugated roofing sheet material from sugarcane bagasse fibers
Authors: Kittisak B , Prayoon S 
Published: April 2021

Abstract
This research was aimed to study the properties of corrugated roofing sheet material from sugarcane bagasse fibers by using 10% adhesive substances comprising Phenol formaldehyde (PF) and polymeric diphenylmethane diisocyanate (PMDI) resins. The corrugated roofing sheet had a density of 500, 700 and 900 kg m−3 and a thickness of 6 mm. Physical, mechanical and thermal properties tests were performed according to industry standards. The results revealed that sheets with high density had low moisture content, low water absorption and low thickness swelling. PMDI resin provided the best adhesive quality. As for the mechanical property investigation, modulus of rupture, modulus of elasticity, the impact strength. Regarding the thermal property investigation, were thermal conductivity and resistance covered. It was also found that the higher density they had, the better mechanical properties they owned. The PMDI-based corrugated roofing sheet with 900 kg m−3 density achieved the best mechanical properties. They can be highly possible to be used as a substitute material for asbestos roofing tiles.
PLS-SEM algorithm for the decision to purchase durian milk with seeds
Authors: Mai D S , Hai P H , Cuong D T , Khoi B H 
Published: April 2021

AbstractThis research’s primary purpose was to research these factors’ influence on buying decision durian milk with seeds. We gathered research data from 300 consumers in Ho Chi Minh City, Vietnam. The research model was proposed from previous researches. Besides, we applied the PLS-SEM Algorithm with SmartPLS software for data analysis. Partial least squares (PLS) path modeling is a variance-based structural equation modeling (SEM) method that is broadly implemented in business and social sciences. It is a new statistical tool for the research method. The research results showed that factors (brand, product availability, product reference group, product quality, and promotion activities) positively affected purchasing decisions.
Precursors and ramifications of creativity on innovation in product design teams - A study on Indian information technology sector
Authors: Pandey S , Ruhela V , Ruhela S 
Published: April 2021

AbstractCreativity and creative ideas rest at the heart of designing a novel product. Having said that, the understanding of the source and the process of these exquisite ideas that ultimately form the foundation of novel products is not very extensive. This study takes its lead from the design outlook at the organisational level suggested by Dave Ulrich. It goes one-step forward to grasp the mediating role of creativity between dynamics of the team and the competitive advantage it gives the product. Delving deeper, the aim is to understand the creativity in teams that design these novel products in terms of the product itself and the program to market such product. Exploring the influence of creativity on the strategic outcomes associated with innovation, this study empirically tests the impact of group dynamics, both within and outside these groups on the novel product and the program to market them. The study takes into account inputs from 206 employees in information technology sector in India. Maximum likelihood estimation has been used test the model by placing it in a structural equation. Upon analysis, novelty and meaningfulness come out as the dimensions that impact dynamics of teams. The novelty of a new product emerges as the resultant of divergent processes primarily impacted by factors outside of the team such as reward systems and the process of planning. In addition, the meaningfulness that comes with the new product is derived from a convergent process prominently affected by factors within the team - provisions and superordinate identity. Moreover, the newness of the market program is determined by the cohesion in a social setting, formalisation in the process of planning and risk taking likelihood. The study also indicates that the newness of the new product and its meaningfulness has a more profound mediating role in ensuring a competitive edge. Thus, it can be concluded that an organisation gains a significant edge in competition if it manages the dynamics of teams to foster creative novel products and programs to market them.
Advanced MF antennas for underground communications
Authors: Fedosov D V , Kolesnikov A V , Nikolaev A V 
Published: April 2021

Abstract
The paper considers the features of underground radio communication at medium frequency (MF) range. The perspective and most effective antenna solutions at MF range are presented. The characteristics of the antennas are given: the reflection coefficient, the dependence of the input impedance. Antennas are matched with voltage standing wave ratio (VSWR) less than 1.2. Attention is focused on some features of the operation of these antennas. The results of comparative tests of antennas are presented.
Parametric and structural optimization of the modal filter on a double-sided printed circuit board
Authors: Samoylichenko M A , Gazizov T R 
Published: April 2021

Abstract
The effect of reducing the foil thickness and removing of one or two reference conductors in a modal filter on a double-sided printed circuit board is considered. The simulation of the ultra-short pulse propagation in such structures demonstrated that the signal is attenuated by 2 times in relation to half the e.m.f. when the foil thickness is 70 µm and by 3 times when the top left reference conductors is removed.
Quasi-static analysis of susceptibility of the spacecraft power bus bar to the effects of electrostatic discharge
Authors: Drozdova A , Komnatnov M 
Published: April 2021

Abstract
We performed a quasi-static analysis of susceptibility of the spacecraft power bus bar to the effects of electrostatic discharge (ESD). For the analysis, we used a schematic diagram of a power bus bar model with branch conductors. The schematic diagram consists of series-connected transmission lines, which represent the cross-sections of each power bus bar element. An ESD pulse with a current shape of fourth severity level was accepted as an excitation. The work shows the voltage waveforms at the beginning and end of the power bus bar when ESD impacts the branch conductors. We localized the maximum amplitude of the voltage in the bus section under ESD exposure. It revealed that when ESD affects the shielding tape covering the negative branch, there is a maximum attenuation (13.5 times) at the positive branch and a minimum attenuation (1.6 times) at the negative branch.
Intelligent tools for analyzing NON-factors of the project environment
Authors: Bulygina O V , Emelyanov A A , Ivanova O A 
Published: April 2021

Abstract
The implementation of complex innovative projects to create high-tech products is usually associated with a high level of uncertainty, which is due to the lack of “quality” (accurate, complete, reliable, consistent, etc.) data on their internal and external environment. In this regard, special attention must be paid to the stage of project planning, which takes into account the results of identification and analysis of risk situations that may arise during the project implementation. In conditions of information uncertainty, it is advisable to use data mining methods to solve these problems. So, to identify the factors of the internal and external environment, which can negatively affect the project, it is proposed to use a neural fuzzy classifier. The analysis of the identified factors must be carried out taking into account the possibility of the simultaneous occurrence of several risks, i.e. the appearance of a systemic effect, which can be assessed using the Hartley emergence coefficient. In turn, the obtained values of this indicator determine the choice of analysis tools: in the case of a low value, it is proposed to use fuzzy logical inference according to the Mamdani algorithm, otherwise - fuzzy pyramidal networks.
Prototype of EMC Expert system for optimal design of radio-electronic equipment
Authors: Kvasnikov A A , Kuksenko S P , Idrisov F F 
Published: April 2021

Abstract
This paper presents the results of the development of a prototype EMC expert system for optimal design of radio-electronic equipment. The work outlines the general structure of the system and describes the development features of the interference signals database, the analytical report generation module, the ready-made solutions database, the shielding effectiveness module and the degradation trend module.
Multicriteria optimization of a four-layer reflection-symmetric modal filter parameters for ESD protection
Authors: Zhechev Y S , Ivantsov I A , Zabolotsky A M 
Published: April 2021

Abstract
The paper presents the results of a quasi-static analysis of a four-layer reflection-symmetric modal filter (MF) in the time domain. The authors analyzed its effectiveness in protecting electronic equipment against electrostatic discharge (ESD). The work presents the results of a genetic algorithm optimization of the geometric parameters of the structure under study. The results show that the investigated MF with optimal parameters can suppress the ESD peak emission at a shorter length.
Experimental study of a high current electromagnetic interference filter for the spacecraft power bus
Authors: Zhechev Y S , Kosteletskii V P , Zabolotsky A M 
Published: April 2021

Abstract
Secondary power supplies, including on-board electronic equipment, extend the range of operating frequencies in order to increase the efficiency of the converters. This leads to the deterioration of electromagnetic environment. We propose a protective device for the spacecraft power bus based on lumped elements, which is characterized by high reliability, radiation resistance, and low mass-dimensional parameters. This device suppresses common and differential conducted interference in high-current power circuits. The results of the circuit simulation and field experiments in the frequency domain are presented. The obtained results are analysed, and the practical recommendations are given regarding the design of noise-suppressing devices based on elements with lumped parameters.
Ultrashort pulse decomposition in the turn of a meander microstrip line with a passive conductor
Authors: Nosov A V , Surovtsev R S 
Published: April 2021

Abstract
The paper presents the results of evaluating the effect of changing the cross-section parameters of a meander microstrip line (MSL) with a passive conductor on the ultrashort pulse (USP) waveform and amplitude. The study revealed the occurrence of additional pulses in the structure under investigation in addition to cross-talk and main mode pulses. The delays of each pulse were determined and the conditions for USP decomposition in a meander MSL with a passive conductor into a sequence of seven pulses were formulated. By means of heuristic search optimization according to the criteria for fulfilling formulated conditions and the criterion of the minimum amplitude, we obtained the optimal parameters of the line cross-section, at which the USP is decomposed into a sequence of seven pulses with attenuation of 5.38 times relative to half of the electromotive force.
Modular operators and entanglement in supersymmetric quantum mechanics
Authors: Chatterjee Rupak , Yu Ting 
Published: April 2021

Abstract
The modular operator approach of Tomita–Takesaki to von Neumann algebras is elucidated in the algebraic structure of certain supersymmetric (SUSY) quantum mechanical systems. A von Neumann algebra is constructed from the operators of the system. An explicit operator characterizing the dual infinite degeneracy structure of a SUSY two dimensional system is given by the modular conjugation operator. Furthermore, the entanglement of formation for these SUSY systems using concurrence is shown to be related to the expectation value of the modular conjugation operator in an entangled bi-partite supermultiplet state thus providing a direct physical meaning to this anti-unitary, anti-linear operator as a quantitative measure of entanglement. Finally, the theory is applied to the case of two-dimensional Dirac fermions, as is found in graphene, and a SUSY Jaynes Cummings model.
Growth and development of vanda (Vanda sanderiana) explants in vitro on the effect of extracts of organic matter
Authors: Kasutjianingati  , Firgiyanto R , Pratama N P 
Published: April 2021

Abstract
This study aims to determine the appropriate extract of organic matter to be substituted on MS media, to obtain Vanda orchid Vanda sanderiana plantlets ready for acclimatization. The study consisted of 2 experiments, the first experiment, factorial Completely Randomized Design (CRD), the first factor was tomato extract, consisting of 3 levels (tomato extract 50 ml/l; tomato extract 100 ml/l, and tomato extract 150 ml/l) and the second factor consists of 3 levels of bean sprouts extract (100 ml/l bean sprouts extract, 150 ml/l bean sprouts extract, 200 ml/l bean sprouts extract). The second experiment compared the best or most efficient composition of the first experiment with BAP media (3 ppm), using the T-test. In the first experiment the growth variables (plant height and number of leaves) of all treatments were not significantly different, but the highest number of shoots was obtained at 50 ml/l tomato extract and 100 ml/l bean sprouts extract (6 shoots), the other 1-2 shoots. This treatment in the second experiment was proven to show a better plant height, leaf number and number of shoots than plant growth in BAP media (3 ppm).
Efficacy of coffee peel extract as natural antimicrobial in coconut oil soap to against staphylococcus aureus
Authors: Budiati T , Suryaningsih W , Wahyono A , Azizah DN , Firdaus SF , Imawati KK , Primaharani O , Kurniasari JA , Arlita AUF 
Published: April 2021

Abstract
The aim of the study was to evaluate the efficacy of coffee (Coffea canephora) peel extract as natural antimicrobial in coconut oil soap to against Staphylococcus aureus. S aureus, a pathogenic bacteria, was common to be found on human skin. By using Minimum Inhibitory Concentration (MIC) and inhibition zone, the antimicrobial activity of coffee peel extract were 16,7 + 7,22% and 0,38 + 0,21 mm, respectively. Phytochemical compounds of coffee were caffeic acid, cathecin, coumaric acid, gallic acid, hesperetin, kaempferol, hesperidin, luteolin, quercetin. Antimicrobial activity of coffee peel extract showed to be potential as natural antimicrobial in coconut oil soap to inhibit S. aureus.
Scale up and performance test of the rotary vacuum dryer type batch for drying oyster mushrooms
Authors: Djamila S , Iswahyono  , Bahariawan A 
Published: April 2021

Abstract
Rotary Vacuum Dryer Type Batch (RVDTB) is designed to reduce the moisture content of oyster mushrooms from ± 92% to ± 10%, at 60 °C with vacuum pressure 76 cm Hg and 8 hours drying time by capacity of 2 kg/process. Grinded dry oyster mushrooms produce flour used as a raw material due to its flexibility. This is in accordance with the Indonesian National Standard (SNI), therefore, there is a need to increase the dimensions (scale-up) of RVDTB capacity. The study aims to scale up and to test the RVDTB performance by increasing the drying capacity and suction power of the water jet pump. The methodology was used to redesign the RVDTB scale up, manufacture component, assemble, and test performance. The redesigning results shows on 36 cm diamater of cylindrical drying chamber with a length of 50 cm, and 2 HP suction pump power with the flight sets horizontally on 30°. The performance test results before and after the RVDTB scale-up were a) capacity of 2 kg and 3 kg, b) drying rate of 0.227 kg/hour, and 0.250 kg/hour, c) efficiency of 6.74 % and 7.42 %.
Physical characterization of coconut fruit (Cocos nucífera L) in the region of Jember regency
Authors: Nuraisyah A , Nugroho S A , Fatimah T 
Published: April 2021

Abstract
Jember is known as the region that produces the source of coconut in abundant yet it is not utilized optimally in processing. The research was carried out in May to November 2020 at Jember: 1) in the lowland Wuluhan and Puger subdistrict with a height of 10-100 m above sea level; 2) in Medium region in Arjasa and Silo Subdistrict with an altitude of 100-350 m above sea level and 3) High region in Sumberjambe and Panti subdistrict, with an altitude 400 m above sea level. The measurement of the fruit was analyzed by using a ruler and digital weighing, involved 1) the weight of coconut, 2) fiber of the coconut, 3) water, 4) shell, 5) flesh coconut, and 6) Copra. Data of research are by description. Physical characteristics include the weight of the coconut fruit, the weight of coconut water, the weight of coconut flesh, the weight of the coconut shell, the weight of the copra and the thickness of the coconut flesh. The coconut showed optimally physical characteristics in the medium region (100-350 m above sea level).