bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical word problem solving abilities of hearing-impaired students
Authors: Suarsana I M , Sudatha I G W , Mahayukti G A , Apsari R A 
Published: March 2021

Abstract
One of the useful methods to facilitate the students in understanding the benefits and real application of mathematics in real life is by formulating the problem in words. Unfortunately, the previous studies found that students with hearing difficulties usually have limited vocabularies and it becomes a barrier to them in understanding the given context in word problems. Therefore, this study aims at describing the ability of students with hearing-impaired problem in solving mathematical word problems by examining the mathematical skills performed. Since the purpose is to describe a phenomenon, qualitative approach with case study design was deliberately chosen as the method of the study. The subject of the research was eight seventh grade students of School for the Hearing-Impaired in Singaraja, Bali-Indonesia. The data were collected through written test and interview. Afterwards, the data were analysed qualitatively using descriptive method. The results show that the students with hearing-impaired problem were struggling in solving mathematical word problems due to the lack of understanding of the problem and mathematical concepts. Furthermore, there is no tendency for the students with lower level of hearing difficulties to perform better in solving word problems.
The existence of irregular n-shape containing a unit circle based on MATLAB
Authors: Utomo Beni 
Published: March 2021

Abstract
This research will provide an implementation of the study about the area in terms of numerical point of view. Regular n-shaped constructions that load a unit circle and load in unit circles can be made for at least 3 points on the unit circle. The irregular n-shaped construction contained in the unit circle can also be made without conditions with a minimum of 3 points on the unit circle. The problem arises in the irregular n-shaped construction that contains the unit circle, apparently it cannot be made by taking 3 points freely. The purpose of this research is to conduct an analysis related to what conditions are needed so that the irregular n terms can be made so that it contains a unit circle. The method used is a literature review, carried out by comparing and analyzing research that has been done relating to irregular and irregular aspects, the analysis process is carried out on irregular n-construction construction with the help of MATLAB for visualization. The results of the research show that one of the requirements for irregular n-terms can be made and contain unit circles found, and the theory test is carried out empirically with the help of MATLAB for visualization. Another result is a theory about the existence of the irregular n-aspect mathematically.
Mathematical disposition of strategic thinking ability in working on HOTS questions
Authors: Firmansyah E , Mubarika M P , Saniah L 
Published: March 2021

Abstract
This article contains the results of a study of the mathematical disposition of strategic thinking skills in working on HOTS (High Order Thinking Skills) questions. HOTS’s problem in learning mathematics has recently become a trend. Therefore, many educators have begun to learn about the characteristics of HOTS questions, and some of them consider HOTS problems to be closely related to problems with a high degree of difficulty. This study was made with the aim of looking at the relationship between mathematical dispositions and the ability to think strategically in working on HOTS questions. In learning mathematics, it is suspected that the mathematical disposition has an important role in solving HOTS problems with the assumption that if a student has a good mathematical disposition then he can do HOTS problems easily. Working on HOTS questions is also closely related to the ability to think strategically because the characteristics of HOTS questions require students to think strategically in solving existing problems. The ability to think strategically, basically run by personal characteristics, one of which is mathematical disposition. Therefore, mathematical disposition has an important role in the ability to think strategically in working on HOTS problems.
ICT literacy level of Indonesian senior high school mathematics teachers
Authors: Nugroho Yanuarto Wanda , Mistima Maat Siti , Husnin Hazrati 
Published: March 2021

Abstract
Industrial revolution 4.0 nowadays needs I CT literacy to proceed with the technology used for mathematics teachers. Meanwhile, the ICT literacy of mathematics teachers in Indonesia is at a low level and under the other Asia countries. This article aims to look at the level category of ICT literacy among Indonesian Mathematics Teachers in Senior School background. The researcher employed a quantitative approach in the term of descriptive statistical measurement. The collected data were used in order to determine descriptive statistical analysis for each construct; then followed by measuring the mean score, frequently, and finally, interpretation into each construct was applied; in order to set the level of ICT literacy using Dakich category level. This study used the ICT literacy questionnaire consists of 21 items in the form of a 5-point Likert scale. The results show that the level of understanding of the operation and use of ICT, ICT-rich pedagogy, ICT for teaching and professional involvement, and social ecology of ICT life and teaching and as a whole is in the category of access to ICT. This level implied that ICT literacy as a combination of intellectual ability, basic concepts, and new skills possessed by teachers to navigate and use information and communication technology effectively. Also, the level of ICT literacy is based on technical literacy and information literacy, which contains technical questions and information processing skills questions in accessing ICT for teachers. This study contributes to the ICT literacy level, which provides views to mathematics teachers to improve the quality of teachers’ ICT literacy in teaching mathematics.
Identifying geometrical objects in Sumur Gumuling Tamansari: An ethnomathematics analysis
Authors: Nur Alvian Davet , Agustito Denik , Astuti Arigiyati Tri , Harini Esti , Adi Widodo Sri 
Published: March 2021

AbstractThis research was conducted to find mathematical elements (ethnomathematics) in the Sumur Gumuling Tamansari building. The research method used in this study is a qualitative method with an ethnographic approach. The data used are data obtained from observations, documentation, and interviews. Observation and documentation are used to identify ethnomathematics in the Sumur Gumuling Tamansari building. While documentation and interviews with the triangulation method to find out more deeply the cultural values that exist in the Sumur Gumuling Tamansari building. The results of this study are there are mathematical elements (ethnomathematics) in the Sumur Gumuling Tamansari building, namely the concept of a rectangle, pentagon, rhombus, triangle, circle, and the combined concept of a rectangular flat structure with a half-circle. In this case, it can be said that mathematics enters a ll aspects of life including cultural buildings.
The use of technology in learning geometry
Authors: Lu’luilmaknun U , Salsabila N H , Triutami T W , Novitasari D , Junaidi  
Published: March 2021

Abstract
Geometry is important material in mathematics, but some students still find it difficult to learn geometry. The teacher used technology to make it easier for students to learn geometry. The aim of this study is to describe the perception of junior high school students on technology in geometry learning. This type of study is a survey study. The population of study were 100 junior high school students in MTsN 1 Mataram, NTB, Indonesia. The data were taken from 3 to 4 December 2019. The data were collected by questionnaire. Data were analysed using quantitative descriptive methods. The results showed that most students were able to utilize technology in their daily lives. There are 57% of students who have experience learning geometry with technology. There are 67% of students utilizing technological devices for learning geometry and 66% of the devices students often use are smartphones. There are 56% of students who use learning technology such as a learning video. The data also shows that most students agree that learning geometry with technology can have a positive effect on geometry learning. From the results, teachers can also use technology more often to make it easier for students to learn geometry.
Reviving the role of mathematics in science through STEM
Authors: Jazuli Akhmad 
Published: March 2021

Abstract
The STEM learning presented here is designed to facilitate the students to possess skills of imagination, collaboration, problem-solving, as well as critical and creative thinking which highly needed in this rapidly changing era. STEM learning aims to combine science, technology, engineering and mathematics by means of connections between subjects and real-world problems. In the empirical facts, however, STEM has only been practiced in natural science, and has not yet been applied to social science. This literature review analyzes the role of mathematics in developing science, both natural science and social science. In conclusion, mathematics can be played as a role in the development of science, both natural science and social science with various conditions.
Mathematic teachers’ perception on the use of moodle based learning management system in teaching mathematic during the time of covid 19
Authors: Ahmad  , Eko Subekti Fitrianto 
Published: March 2021

Abstract
The aim of the study was to find out the Mathematic Teachers’ perception on the use of Moodle based learning management system in teaching mathematic during the time of Covid 19. The mix methods research design using quantitative and qualitative was used as the method of this research. Fifty six mathematic teachers from elementary to high school in Banyumas Regency were used as the respondents of this research. The questionnaire, semi structure interview and documents were used as a data collection method. Descriptive statistic and thematic data analysis was used as the technique in analyzing the data. The result showed that more than 40% teachers agree if Moodle facilities are very good or by the school and more than 60% teachers agree if the use of Moodle has positive impact to Mathematic learning. This research also got the result if teachers have negative perception on readiness of resources in using Moodle with more than 30% disagree if teachers are ready enough to use Moodle.
Potential solving mathematical problem students focused on self-directed learning in COVID-19 pandemic
Authors: Muhammad Malim , Purwanto Joko , Abida Rahmania 
Published: March 2021

Abstract
The purpose of this research was to depict the mathematical skill of high-school 1 Jeruklegi, 7th-grade students, who have been examined by their teaching in Cilacap Indonesia. This research was a descriptive qualitative analysis. The outcomes of self-directed learning problems, tests on mathematical problem resolution, and interviews collected the data from this research. The data use a method of triangulation. Students were divided into three classes based on the questionnaire’s findings, namely students in the high, medium, and low self-directed learning categories. A purposive sampling technique was used to determine the research subjects. Data from the test and interview were used to identify the mathematical problem-solving abilities of the students. The results of this study show that students with the high self-directed learning group were able to fulfill the indicators of understanding the problem, compile a solution plan, do calculations according to the plan, and check the results obtained. However, the respondents were only able to fulfill the indicators of understanding the problem in the medium self-directed learning category, compile a plan for completion, and do calculations according to the plan. Meanwhile, in the low self-directed learning category, respondents were capable of following the standards to complete the steps to understand the issue and formulate a response plan
Low Noise Amplifier Design and Performance Analysis of RF Front-End for Narrow Band Receivers
Authors: Divya Amgothu Laxmi , Mudavath Mahesh , Ranadheer Ch S , Afzal Mohamed , Venkateswarlu R. 
Published: March 2021

Abstract
This manuscript presents the low noise amplifier design and performance analysis of receiver RF front-end for narrowband wireless communications. The LNA is a central building block of the wireless receiver. A single-ended cascode CMOS LNA is purposeful for reconfigurable applications such as Wireless LAN. The scope of this manuscript is to design an LNA appropriate for wireless applications with improved performance metrics. The contributions of this paper are noise reduction and high gain using an inductive degeneration common source stage. The proposed LNA espouses the entire simulation results in the frequency band of 2.44GHz. The excellent Noise Figure obtained as 0.95dB; the preferable power gain (S21) is 17dB, also the results of P-1dB of -17.3dBm, IIP3 of -10.7dBm at 2.44GHz, respectively. However, the perfect input and output matching network is achieved with proper reverse shielding and excellent stability.
Reinforcement learning for Pedestrian evacuation Simulation and Optimization during Pandemic and Panic situation
Authors: Malebary Sharaf J. , Basori Ahmad Hoirul , alkayal Entisar Soliman 
Published: March 2021

Abstract
The pandemic of Covid-19 has drawn significant attention of the people around the world. The current situation has revealed that this virus infected more than 50 million people globally. On the other hand, the study on crowd simulation can demonstrate the behaviour of massive people that gather in the same location. The importance of this study can lead to safe evacuation in case an outbreak happens. This paper proposed a solution of innovative crowd simulation supported by reinforcement learning and pandemic factors. The study has successfully demonstrated the entering and leaving the various exit and entrance. The experiment is performed with a different mode such as two elevators for exit and entry, staircase and six lanes of gates. As a result of the experimental study, it reveals around 87% of agent behaviour has similarity compared to a real-life simulation performed by previous research. It means the simulation is reflecting the real-life human behaviour when the evacuation process has occurred. The future study can extend to a contagion model of crowd behaviour where an agent can influence each other in a particular situation.
A Simulation Study of Duration-Budget Trade-Off in Home Renovation Project Management
Authors: Purbaningtyas Rani 
Published: March 2021

Abstract
This paper simulated home renovation project management with 15 work items to complete. All work items are depicted in a network diagram to help the project planner manage the house renovation project. CPM/PERT helps the project planner to determine the duration of work and the costs involved. CPM/PERT shows the period needed based on the critical path obtained is 40 days, with a cost requirement of IDR 89,750,000. The project crashing technique shortened the project’s duration to 25 days, with an estimated total cost of IDR 112,100,000. The cost calculations for CPM/PERT and project crashing use the Activity Based Costing (ABC) method. This paper examines how to shortened duration impact the overall budget. Both the client and contractor can get an idea of how to complete the house renovation project and the cost requirements that accompany it.
Effect of Partial Shading on a PV Array and Its Maximum Power Point Tracking Using Particle Swarm Optimization
Authors: Nisa Mehrun , Andleeb Marya , Farhad Ilahi Bakhsh 
Published: March 2021

Abstract
The maximum power point (MPP) of a Solar Photovoltaic (SPV) array varies with temperature and irradiation. Shadow of various objects falling on a certain portion of the SPV array causes partial shading condition (PSC) which results in the formation of hot spot. Thus, reducing the power (output) by 33% on a single cell in addition to the occurrence of various peaks on a P-V curve. To detect global maxima among the multiple peaks is a challenge for researchers. Hence, different Maximum Power Point Tracking (MPPT) techniques are used to overcome this challenge. In this paper, the impact of partial shading on SPV array has been analysed and the Particle Swarm Optimization (PSO) based MPPT technique is used to obtain global maxima under partial shading conditions. The MPPT controller is incorporated with a converter (boost) to vary the input voltage as per the duty cycle of the switch generated by PSO algorithm-based controller.
High Performance Adaptive PSO MPPT Technique for PV Based Micro Grid for a Rural Area
Authors: Ritu K R , Mishra Bharat , Wadhwani A K 
Published: March 2021

Abstract
As the world is switching over to renewable energy with solar energy as the most vital form of it, so it is essential to operate it in a manner that we can extract maximum efficiency from the photo voltic panels. But due to some uncalled for senarios when the PV panels are subjected to partial shading conditions its efficiency is greatly impacted. The MPPT here comes for its rescue, When PSC occurs the PV trajectories will be distinct and very complex due to various peaks available. The traditional MPPT techniques will fail to reach the Global Maximum Power Point and it usually stays at the Local Maximum Peak Point which surely would decline the performance and ability of the PV module. This research focuses on comparing the Particle Swarm Optimization approach and Perturb and Observe technique of MPPT for tracking peak power to identify the GMPP so as to attain the Maximum Power from the PV system. A rural area is selected as the demography of the location suits the proposed study . The load for the location is calculated and then both the algorithms are applied and there performance is analyzed in the study. The performance characteristics of the boost converter can be studied by varying its duty cycle with the two algorithms. This approach provides a high reliability robustness and proficiency towards MPP. The authenticity of this proposed algorithm was established using MATLAB/Simulink
Auctions in Renewable Energy and the Grid Parity Using Solar Photovoltaic Technology in Peru
Authors: Arredondo J , Ramos M 
Published: March 2021

Abstract
This paper, of the network parity situation of photovoltaic solar energy with conventional electrical energy sources, such as hydroelectric and thermoelectric for Peru is analyzed. For this purpose, a review of how the electrical tariff is set for the residential end-user of conventional energy sources has been made. Furthermore, it is shown what it consists about, the cost leveled of energy for the case of photovoltaic solar energy and how this has been used for the calculation of the electric rate of this type of source. A review of the auctions of photovoltaic solar plants that are installed in: Moquegua, Tacna and Arequipa is carried out. The solar photovoltaic tariff has been obtained by auctions, between the year 2010 to 2016, these have decreased significantly until reaching network parity. The costs of both energy sources are compared.
Design and construction of a portable apparatus to measure thermal conductivity
Authors: Cuenca M H , Piñas J M , Mendoza M A , Espinoza F S , Solís J L , Gómez M M 
Published: March 2021

Abstract
The characterization of the thermal insulation properties of construction materials represents a fundamental step on building insulation assessment. The present work aims to design and build a portable apparatus, namely, Portable LAMBDA UNI, capable of measuring the thermal conductivity of insulation materials. This portable apparatus is based on the standard ASTM C 518, which is a secondary method for measuring thermal conductivity. The apparatus also measures the effective thermal conductivity of square prism thermal insulation materials of 60 mm per side and a maximum thickness of 14 mm. The thermal conductivity of the drywall and adobe with Stipa ichu was measured with the Portable LAMBDA UNI, with the values being 0.265 W m−1 K−1and 0.357 W m−1 K−1, respectively.
Consumers’ & producers’ perceptions of Wonogiri cashews, a-potential geographical indication snack
Authors: Setiyono R , Sukartiko A C , Supartono W 
Published: March 2021

AbstractThis study aims to analyze consumers’ and producers’ perceptions of Wonogiri cashew nut, a-potential geographical indication snack. The information used in this study was obtained from surveys carried out on 191 consumers and 61 producers of Wonogiri cashew nut. Descriptive research and cluster analysis were used to analyze consumers’ and producers’ perception and their characteristics. The result suggests that product differentiation was the most determined consumers’ choice, whereas consumer trust was the most determined producers’ choice to produce geographically indicated cashew nut. Two segments were observed for both consumers and producers, each with considerably different perceptions towards Wonogiri cashew nut, a potential geographical indication snack. Consumer education and monthly income enable the two segments of consumers to be differentiated. In comparison, producers’ age, years of work experience, and education level allowed the two segments to be distinguished.
Consumer preference of processed food products: study on livestock products
Authors: Muzayyanah M A U , Syahlani S P , Dewi N H U 
Published: March 2021

Abstract
Food processing of livestock products such as meat and milk develops along with the development of the food processing industry. These foods include frozen, pasteurized, fried, condensed, dried, and canned food. This study aims to analyse the consumer preferences and the influence factor of processed food products. Primary data were collected from 360 sampled consumers. This study clearly indicates that 50 percent of respondents preferred processed food products. Nearly one-third of samples respondent (34.2%) all purchased of processed food products on once a week. Majority respondent was purchasing processed meat food because of quality (43.6%) tasted/preference (59.3%), price (27.6%), and following by brand and easy availability. And these situations were also similar patterns with processed food from dairy product. Almost all selected consumer factor characteristics shown significantly related to purchasing milk processed products, while only income is the majority of meat processed food. The results of this study indicate that the food processing industry of livestock products has great opportunities along with the interests and preferences of a consumer.