bluuebunny/crossref_metadata_2025_split huggingface dataset:
A new initial basis for the simplex method combined with the nonfeasible basis method
Authors: Sangngern Kasitinart , Boonperm Aua-aree 
Published: August 2020

Abstract
The simplex method is a popular method to solve a linear programming problem. It starts by choosing an initial basis associated with the origin point which is far from the optimal point in some problems. In this paper, we introduce a construction of an initial basis for starting the simplex method associated with an extreme point which is close to the optimal solution. This construction involves the angle between the coefficient vector of the objective function and the coefficient vector of each constraint. The small angles will be considered to construct a basis. If the proposed initial basis gives the infeasible solutions, then the nonfeasible basis method is performed to avoid the use of artificial variables. Not only the starting point is close to the optimal point, but also the artificial variable is needless. The results in the computational aspect show that the number of iterations and the running time of our method are less than other methods.
Clustering the Rainfall Stations in Thailand Using Self-Organizing Map
Authors: Wangsoh Natita , Permpoonsinsup Wachirapond 
Published: August 2020

Abstract
The purpose of this study is to classify the pattern of rainfall stations in Thailand over the period from the year 2000 to 2009 using Self-Organizing Map (SOM). The number of stations is collected based on the complete rainfall data during rainy season. The optimal cases of learning rate function and different two SOM array sizes are investigated. The Gaussian function is applied as the neighborhood function. The results show that linear function and the 2×2 SOM array size are most suitable for classifying the pattern of rainfall. The similar characteristic of daily rainfall in each station is clustered into four patterns. Thus, SOM can be classified the similar rainfall stations, efficiently.
Detection of the Weak CMEs by CALLISTO System
Authors: Norsham N A M , Hamidi Z S , Shariff N N M 
Published: August 2020

Abstract
CALLISTO (Compound Astronomical Low Frequency Low Cost Instrument for Spectroscopy and Transportable Observatory) is one of the projects from ISWI and initiative of United Nation and NASA as a support to help developing countries to monitor activities of the Sun for the whole day. Today, more than 164 instruments at more than 100 locations use this system to do research on the Sun. The objective of this paper is to show that even the activity from the Sun is not too intense and large, the CALLISTO system can detect the signal, hence the importance of this system is acknowledged. This is as a hint for us to use the antenna as the part of the CALLISTO system to get the full coverage all day long with the contributed data from around the world. A weak Coronal Mass Ejection (CME) with the median velocity of 231 km/s was observed on 9th March 2019 by SOHO coronagraph and detected by CALLISTO system from multiple sites of UK, Switzerland and Italy. This faint CME was not giving the high impact to the Earth’s magnetosphere and thus no minor occurrence of the geomagnetic storm.
Arching Phenomenon of Granules in Fluid under Rotation System
Authors: Chaiworn P. , Inthakum P. 
Published: August 2020

Abstract
This research aims to explain the experimental model using theoretical analysis techniques, the mechanisms of convection and arching for granular sands with fluid under the rotation system. The arrangement of the granular sands with fluid arching thus forms a cylindrical container while under rotating. The results showed that the convection of the fluid, while a rotating continuously, the fluid then moves to the side surface of the container. Causing a center of the bottom of the container is empty space, the surface of the fluid to look like a parabolic curve. When the granular sands drop into an empty area to the center of container. To fill that area than arching at the center of the cylindrical container. That looks like an inverted parabola curve. The mixing mechanisms adjusted the small granular sands with fluid to stable more than large granular sands. This mechanism, can lead to a knowledge of the applications in agriculture and industry.
Time-domain optical coherence tomography and gelatin-based skin phantom as training tools for venipuncture
Authors: Mandia P F , Vallar E A , Shiina T , Macalalad E P , Galvez M C D 
Published: August 2020

Abstract
Optical coherence tomography (OCT) is a non-invasive imaging modality developed in the early 1990’s for retinal imaging. Further modifications allowed OCT’s to be used on other parts of the human body, and non-medical areas as well. Time-domain OCT (TD-OCT) basically is a Michelson interferometer with a low-coherence light source which enables non-invasive, cross-sectional visualization of the sample. In this paper, the researchers used the TD-OCT system, which uses a rotating reference mirror. Using this system in conjunction with fabricated skin phantoms, students of venipuncture can hone their skills on skin phantoms before practicing on actual persons. This helps in mitigating the potential risks inherent to the performance of invasive procedures such as venipuncture. Furthermore, the skin phantom is chiefly composed of gelatin with latex tubing used to imitate the veins. Such materials are cheap and readily available, allowing multiple phantoms to be fabricated easily. Preliminary results showed that OCT is a promising tool in imaging the tissue phantom and thus can be utilized for venipuncture training.
Market efficiency of the crude palm oil: Evidence from quantum harmonic oscillator
Authors: Lee G H , Joo K , Ahn K 
Published: August 2020

Abstract
This study examines the weak-form efficient market hypothesis of the crude palm oil market by adopting the quantum harmonic oscillator. This approach allows us to analyze market efficiency by estimating one parameter: the probability of finding the market in a ground state. Our results confirm that the crude palm oil market is more efficient than the West Texas Intermediate crude oil market. We explain the greater market efficiency comes from a small proportion of speculative transactions, resulting from tight market operation policies.
Optimization of process parameters on the response of corrosion resistance of electroless Ni-Co-P coating using Box-Behnken Design (BBD)
Authors: Sarkar S , Koley I , Baranwal R K , Mukherjee A , Lamichaney S , Majumdar G 
Published: August 2020

Abstract
Ternary Ni-Co-P alloy coating was chosen to improve the corrosion resistance of the Copper substrate. Box-Behnken Design (BBD) of experiment was utilized for the optimization of the effects of different process parameters such as Cobalt Sulphate, Sodium Hypophosphite, and temperature. Electrochemical Impedance Spectroscopy (EIS) was used to study the corrosion resistance behaviour of different samples by altering different parameters. Analysis of Variance (ANOVA) was done to determine the important process parameters and their significant interactions. The surface morphology, microstructures and elemental compositions of the as-deposited coatings were analyzed using Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Energy Dispersive X-Ray Spectroscopy (EDX) respectively. Finally, 15g/L of Cobalt Sulphate, 25g/L of Sodium Hypophosphite, and 85°C of bath temperature were found out to be the optimum conditions for coating deposition in order obtain a corrosion resistance of 1165 ohm-cm2.
Antioxidant Activity of Nabeez Water from Ajwa Palm Date Fruits (Phoenix dactylifera L) as a Favourite Drink of the Prophet Muhammad SAW
Authors: Fibonacci Anita 
Published: August 2020

Abstract

Nabeez water is a kind of infused water from Ajwa palm date fruits that are consumed by Muslim societies in Indonesia especially when Ramadan, unfortunately, its ability to scavenging free radicals have never been studied. The aim of the study was to determine the antioxidant activity of Nabeez water by DPPH methods. Infused water from Ajwapalm date fruitswere made with maceration for 24, 48 and 72 hours with three times replication. The stability contact time result was 60-100 minutes, and maximum wavelengths result was 516 nm.IC50
calculation results showed that at the 24-hour maceration IC50 value was 223.6 ppm, while at 48-hours maceration was 369 ppm, and at 72-hours maceration was 2530 ppm. It can be concluded that the best antioxidant activity achieved at of 24-hour maceration.
The Influence Computer Based Training Utilization of Learning Outcomes of Solid State Electronics Viewed from Different Learning Style
Authors: Suprapto Yuyun , Nuraela Luthfiyah , Masitoh Siti , Nurdyansyah  , Mandarani Vidya 
Published: August 2020

Abstract
Experimental learning method offers more experience and knowledge for learners. This research aims to determine the influence of computer based training utilizzation on learning outcomes of solid state electronics viewed from different learning style. Computer Based Training (CBT) is part of Computer Assisted Instruction (CAI), which is learning by using computer aids, such as for presentations as teaching aids and so on. CBT, which refers to Electronics WorkBench (EWB) is a category of software tools that can be used to simulate the workings of an electronic circuit both analog and digital. learning style is the way individuals begin to concentrate on, process, internalize, and remember new and difficult academic information or skill. Using CBT on experimental learning with different learning style could result on different learning outcomes. This research used quantitative approach in quasi-experimental frame. In this research, the compared conditions were the experimental learning method with CBT and analog experimenter and learning style, which were grouped into three, visual, auditory and kinesthetic learning style. The research instrument used were questionnaires and tests, while the data analysis used two ways of ANOVA. The statistical analysis showed that there was difference learning outcomes in Electronica Solid State Subject among experimental learning with CBT and analog experimenter. Furthermore, there was no interaction among the experimental learning with CBT and the learning style in terms of their effect towards learning outcomes.
Computational Analytic of Research Topics on Teacher Performance and Supervision Principal
Authors: Munawaroh Siti , Noor Marzuki , Santoso Handoko , Juhri AM 
Published: August 2020

Abstract
Improving teacher performance is very important in order to improve the quality of education, especially in elementary schools. Teachers are the spearhead in achieving educational goals; the quality of teachers can be seen from their performance. Many factors affect the performance of teachers, among others, academic supervision conducted by the principal to the teacher. The purpose of this study is to reveal the effect of the Principal’s academic supervision on the performance of teachers in elementary schools throughout the South Lampung Natar District. The study population was elementary school teachers in Natar District, and the data were obtained by using questionnaire and interview methods. Data analysis was performed using simple regression analysis with the help of the SPSS program. The results of the data analysis show that academic supervision by the school principal affects improving teacher performance, obtained an R2 of 0.1, or the contribution of this academic supervision of 1.1% to an increase in teacher performance, other factors influence the rest.
Development Internet Of Things For Smart Factory In PT Wik East Batam
Authors: Ridho Muhammat Rasid , Syastra Muhammad Taufik 
Published: August 2020

Abstract
Industrial Internet of Things (IIoT) combines a network of machines and devices with increased intelligence and is defined through software. The purpose of this research is to find out how to read sensors in all production machines in a molding department, how to convert and store data from production machines to databases, how to display in web applications and read by all devices for decision making materials and to find out the added value obtained by the molding department with the Internet of Thing. The method used uses the SDLC method: planning, design analysis and implementation. The results of his research that with IoT we can read sensors in all production machines in a molding department, can convert and store data from production machines to a database that will become big data, can display in web applications and read by all devices for decision making materials and can get added value such as interconnection, information transparency and decentralized decisions.
Tukang.com Business Model Re-Design: Smartphone-Based Builder Service Application
Authors: Fadillah A , Hartanto J , Achsani N A , Hasanah N 
Published: August 2020

Abstract
Globalization has now entered a new era where the internet sector has become a strategic focus and development priority throughout the world. The business sector has been using the internet and mobile applications as media transactions, including the construction service sector. One company in the field of construction services that utilize internet technology and mobile applications is Tukang.com. Facing increasingly high competition, Tukang.com must further improve its performance comprehensively. Therefore, it is necessary to evaluate and improve the performance so that it becomes a comprehensive measure of performance. This study aims to evaluate and measure the performance of Tukang.com comprehensively. The methods used in this paper were the Business Model Canvas (BMC) and Balanced Scorecard (BSC). The BSC method not only measures performance based on financial perspectives but also measures performance based on non-financial perspectives. Analysis of balanced scorecard Tukang.com produces initiatives from four perspectives namely financial perspective, customer perspective, internal business process perspective and growth, and learning perspective. Furthermore, the weighting of the Eckenrode method was carried out to weigh the strategic objectives that Tukang.com should prioritize for the development of its company. The improved business model of Tukang.com is the result of the three methods that have previously been conducted and have directly affected the nine business elements in the canvas model.
The Effect of Liquid Bio Fungicides Dosage Trichoderma spp. against Fusarium Wilt Diseases, Growth and Yield of Onion
Authors: Sudantha I M , Suwardji S , Aryana I G P M , Pramadya I M A , Jayadi I 
Published: August 2020

Abstract
The study aimed to determine the effect of liquid bio fungicides dosage Trichoderma spp. Against Fusarium wilt diseases, growth and yield of onion. This study used an experimental method with experiments on field conditions carried out in Sembalun Bumbung Village Sembalun District East Lombok Regency from May to August 2018. The experiment used a Randomized Block Design with liquid bio fungicides Dosage Trichoderma spp. which consists of 9 treatments, namely, 0 ml / plant, 2.5 ml / plant, 5 ml / plant, 7.5 ml / plant, 10 ml / plant, 12.5 ml / plant, 15 ml / plant, 17, 5 ml / plant and 20 ml / plant. Each treatment was repeated three times so that there were 27 experimental units. Experimental parameters included the percentage of disease incidence, plant growth (height and number of plant leaves), and yield of onion (number of tillers and weight of harvested onion). Data were analyzed using Analysis of Variance at 5% level and Honestly Significant Different Test at 5% level. The results showed that Trichoderma spp. can increase the induced resistance of onion to Fusarium wilt diseases and increase the growth and yield of onion. The conclusion of this experiment is liquid bio fungicides Trichoderma spp. starting with a dose of 5 ml/plant caused the onion plants not infected with Fusarium wilt diseases. Similarly, at the starting dose of 5 ml/plant increase the weight of harvest onion.
Scientific Approach and The Effect on Students Scientific Literacy
Authors: Shofiyah Noly , Afrilia Iftita , Wulandari Fitria Eka 
Published: August 2020

Abstract
The development of scientific literacy skills were the main purpose of science education. The curriculum 2013 has suggested scientific approach as the alternative instruction to foster students’ scientific literacy. This goal of this study was to examine the effect of scientific approach on scientific literacy of students. The data was collected through pre-test and post-test arranged based on three indicators of scientific literacy, namely scientific reasoning, scientific investigation, and problem solving. The tests were administered to 34 students and the results were analyzed using the normalized gain score (N-gain). The findings informed that scientific approach has a medium effect on scientific literacy. In addition, the dominant indicator of scientific literacy was scientific reasoning. This valuable information could be used by the teacher as a reference to develop the students’ scientific literacy through scientific approach.
Development of Moodle-based Content Learning System in MKDK Student Development Subjects at LPTK in Indonesia
Authors: Sriadhi  , Khaerudin  , Wahyuningtyas Neni , Darni  , Zainul Rahadian , Adri Muhammad , Rusdinal  , Nasrun  , Rahmulyani  , Nuranjani  , Nurmaniah  , Wedi Agus , Surahman Ence , Aisyah Eny Nur , Oktaviani Herlina Ike , Meilanie R. Sri Martini , Purnamawati Siti Nuraini , Hapidin  , Listyasari Winda Dewi , Irsyad  , Syafril  , Anisah  , Santoso Yulianto , Muhardi  , Kristanto Andi , Susarno Lamijan Hadi , Kuswandi Dedi , Wardani Ratna , Adnan Evita 
Published: August 2020

Abstract
Learning in the industrial revolution era 4.0 and the Covid 19 pandemic period shifted towards digital and online learning. This research aims to analyze the Basic Educational Course (MKDK) elearning product for Student Development that was developed. The method used is mixed method research, qualitative and quantitative mixture. The development of e-learning products uses the Borg and Gall method, while validity and practicality are carried out by questionnaire analysis to respondents online. The instruments for product development and testing have been declared valid by Expert, both in content, design and IT. Based on data from respondents (n = 40), MKDK e-learning products have a high acceptability (3.84) and are appropriate to use. From the aspect of e-learning that was examined, the material portion or content substance had the highest yield, 4,215. Meanwhile, the evaluation aspect received the lowest score, which was 3,588. Based on this research, it was concluded that e-learning products for subjects with learning and learning subjects could be widely used in the Educational Institution (LPTK) in Indonesia.
Development of Content Learning System in Professional Education Subjects for Educational Institutions in Indonesia
Authors: Adri Muhammad , Rusdinal  , Zainul Rahadian , Darni  , Sriadhi  , Wahyuningtyas Neni , Khaerudin  , Nasrun  , Rahmulyani  , Nuranjani  , Nurmaniah  , Wedi Agus , Surahman Ence , Aisyah Eny Nur , Oktaviani Herlina Ike , Meilanie R. Sri Martini , Purnamawati Siti Nuraini , Hapidin  , Listyasari Winda Dewi , Irsyad  , Syafril  , Anisah  , Santoso Yulianto , Muhardi  , Kristanto Andi , Susarno Lamijan Hadi , Kuswandi Dedi , Wardani Ratna , Adnan Evita 
Published: August 2020

Abstract
Learning in the Industrial Revolution Era 4.0 has shifted the role of learning teachers to confirm teachers. This research aims to analyze the acceptability of e-learning products in Educational Basic Courses (MKDK) of Education Professions for students at the Educational Institution (LPTK) in Indonesia. In this study conducted by the Borg and Gall development method, and the testing process is carried out online. Analysis of product feasibility using online questionnaires to 40 respondents. The result is an instrument of development declared valid by experts, both in substance material, learning design and information technology (IT). Based on the questionnaire score analysis, e-learning products have a high acceptance score, which is 3.88. This figure means that MKDK e-learning products in the Educational Profession have high feasibility, so they can be implemented for online lectures for LPTK students in Indonesia.
Development of e-Learning Courses for Subjects about ‘Learn and Learning’ with Moodle-based for Prospective Teacher in Indonesia
Authors: Zainul Rahadian , Adri Muhammad , Sriadhi  , Khaerudin  , Wahyuningtyas Neni , Darni  , Rusdinal  , Nasrun  , Rahmulyani  , Nuranjani  , Nurmaniah  , Wedi Agus , Surahman Ence , Aisyah Eny Nur , Oktaviani Herlina Ike , Meilanie R. Sri Martini , Purnamawati Siti Nuraini , Hapidin  , Listyasari Winda Dewi , Irsyad  , Syafril  , Anisah  , Santoso Yulianto , Muhardi  , Kristanto Andi , Susarno Lamijan Hadi , Kuswandi Dedi , Wardani Ratna , Adnan Evita 
Published: August 2020

Abstract
Online learning is the key to the implementation of learning in the Covid 19 pandemic and the New Normal era. The purpose of this study was to determine the effectiveness of the e-learning course on subjects ‘Learn and Learning’ with Moodle-based for prospective teachers in Indonesia. This research was conducted using the Berg and Gail development method. The development instruments were validated by experts, and further product development was carried out in an integrated and simultaneous manner by the Higher Education Research Consortium Team (KRUPT) from Padang State University, Malang State University, Jakarta State University, Medan State University and Surabaya State University. This product is declared valid by the Expert, both in content, design and IT. Tests were limited during the Covid 19 pandemic and data collection was carried out online. Data collected in the form of an online questionnaire to student respondents (n = 40). Based on respondent questionnaire data, this product was declared to be very suitable for online learning, reaching 3.967 which indicated the highly acceptance level. Based on this research, it was concluded that e-learning products for subjects with learning and learning subjects could be widely used in the Educational Personnel Education Institution in Indonesia.
Textbook Design on Temperature and Thermodynamic Based on Problem Solving Blended Learning Model
Authors: Rohman Agus , Ain Trise Nurul 
Published: August 2020

Abstract
Research has been conducted to determine the validity of the development of textbook based on problem solving-blended learning model. The development method used in this research is refer to the 4D development step of Tiagarajan modified. Validation is conducted by 5 people, they are through the validation expert and appropriate field of study. Validation data was obtained by using a sheet validation then analysed by descriptive qualitative method. There are six components of validated used to validate the textbook, including: 1) design; 2) format; 3) materials (content); 4) language; 5) presentation; and 6) the innovation and quality of learning. The result of validity of textbook based on problem solving-blended learning model is 3.3 with a valid criteria. Therefore, the textbook developed are valid and appropriate to use.