bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation of Selenide Semiconductor Materials and Photoelectric Detection in Thin Film Solar Cells
Authors: Duan Siyao , Zhuang Zhu 
Published: November 2019

Abstract
For nearly half a century, semiconductor technology has achieved rapid development as the core of modern high technology. New materials and various functional devices based on semiconductor technology affect all aspects of national production and life. The development and application of semiconductor materials is the basis for the development of semiconductor technology, which is also an important source of motivation and confidence for countless researchers. In this paper, two kinds of selenide semiconductors with excellent material properties are selected for key research, including the controllable preparation of materials and the exploration of high-performance optoelectronic functional devices. Firstly, Sb2Se3 nanorods were prepared by thermal injection method, and the key defects of low conductivity of Sb2Se3 nanorods were successfully solved by forming semiconductor heterojunction and semiconductor doping. Based on this, a Sb2Se3 nanorod-based photovoltaic with excellent performance was constructed. Prototype device. Subsequently, the conductivity and photoconductivity of Sn-doped Sb2Se3 polycrystalline semiconductor were controlled by high-temperature melting method. Based on the preparation of Sb2Se3-based target, Sb2Se3-based thin film was prepared by RF magnetron sputtering. Quasi-homojunction Sb2Se3 thin film solar cell with important development potential. In addition, the thermal injection method is used to realize the controllable preparation of pure phase nanoflowers, and combined with mature Si-based semiconductor technology, the high-performance y-Iri2Se3/Si heterojunction photodiode is constructed for the first time.
Effect of Microwave Irradiation on Physical Adsorption Accuracy and Photocatalytic Activity of Nano-ZnO Materials
Authors: Bian Xiaofang , Yang Jianping 
Published: November 2019

Abstract
Trace toxic organic compounds, such as dyes and polymer additives, can cause serious environmental pollution and threaten human health. Therefore, photocatalytic degradation of organic dye pollutants as an abiotic means has attracted much attention. In the process of preparing ZnO by precipitation method, a series of nano-ZnO materials were obtained by microwave radiation with different power. The crystal structure, morphology and surface physicochemical properties of the synthesized materials were characterized. The results show that the surface area has different degrees of increase compared with the ZnO prepared by the ordinary precipitation method. After different power microwave irradiation, the photocatalytic activity of ZnO has been improved to different extents, and is significantly higher than the commercially available P25 and ZnO without microwave irradiation.
Analysis of Differential Calculus in Economics
Authors: Marsitin R 
Published: November 2019

Abstract
The differential is one of the mathematical material in calculus which is loaded with counts. Differential counts can be applied in economics for profit optimization. This study aims to analyze differential calculus in economics. This research is a descriptive qualitative study. This research analyzes the profit optimization in the entrepreneurial world with the second differential formula in calculus. Data analysis is to describe the results of the analysis of the second differential formula with economics in optimizing profits. Calculation of calculus uses the second differential of the mathematical model with the provision that the second differential result is negative which is smaller zero. The results of the analysis show that the second differential calculus smaller than zero, so it can be concluded that to obtain profit optimization in the economy it can be applied using the second differential calculus.
Drought resistance selection in ponorogo local rice (oryza sativa l.) Varieties
Authors: Jadid K , Cahyanti L D , Muhammad  , Setyaningrum H , Trisnaningrum N 
Published: November 2019

Abstract
Drought is one of the main problems for the development of rice plants. The aims of this study were selecting several Ponorogo local rice cultivars that have resistance to drought stress based on germination ability in various PEG 6000 (Polyethylene Glycol 6000) concentration treatment, root penetration ability to wax layer (consisted of 60% wax and 40% vaseline) and chlorophyll content during drought stress. The germination test with PEG 6000 used a completely randomized design (CRD) factorial pattern consisting of 2 (two) treatment factors, namely cultivar and PEG concentration with 3 replications. The first treatment factor was a variety of Ponorogo local rice cultivars consisting of 5 cultivars, namely: Legowo, Mlarak 1, Malihan Ketan, Philips and Edok. The second treatment factor was PEG concentration, consisting of 4 (four) levels, namely: 0 (Control), 15, 20 and 25%. Rice seeds that passed the selection using PEG 6000 in the germination phase, were used in the root penetration ability test. Data were analyze dusing variance analysis with 95% confidence level and continued with Duncan multiple distance test at 5% level. The results of the study revealed that Legowo cultivars showed the best germination in 25% PEG treatment with 15% germination percentage, 0,5 cm seminal root length, 0,1cm shoot length, seminal root length ratio per shoot length 4,2 and vigor index 0,1. At 20% PEG treatment, Edok cultivars gave the best results with 85% germination percentage, 1,7 cm seminal root length, 0,3 cm shoot length, seminal root length ratio per-shoot length 5,4 and vigor index 1,7. The highest number of roots that can penetrate the wax layer was produced by Edok cultivars averaging 19,3 strands with an average length of 25,5 cm.
Identification of ElectroEncephaloGraph signals using sampling technique and K - nearest neighbor
Authors: Hindarto H , Muntasa A , Efiyanti A 
Published: November 2019

Abstract
Electroencephalograph is a device that can help humans observe and analyze the results of electrical waves produced by neurons in the brain. The results of reading the tool are called Electroencephalogram (EEG), besides being able to help diagnose physician for medical therapy, it is also developed for the Brain-Computer Interfacing (BCI) application. BCI is a method that allows humans to be able to control an external system without direct contact with the system. Research on communication between humans to control external equipment has been widely investigated, including research on brain activity to control a cursor on a computer screen. This study focuses on feature extraction for ElectroEncephaloGraph (EEG) signals using the sampling technique. K - Nearest Neighbor is used as a classification of EEG signals to determine whether the cursor moves up or down. The data used are EEG data originating from the 2003 BCI competition (BCI 2003 Competition). Decision making is done to classify the cursor movement up and down the cursor movement. The research data uses 250 EEG signal file training data and 50 from EEG signal file testing data, so that the whole becomes 300 EEG signal data files. The best results with K = 3 values obtained for the classification of EEG signals using K-NN are 76% of the signal data tested.
Structural Performance Monitoring System Using Android RViSITS For High Rise Building
Authors: Riyanto W , Irawan D , Adi T J W , Iranata D , Rizki Amalia A 
Published: November 2019

Abstract
In 2017, Indonesia’s National Earthquake Study Center (PuSGeN) issued an updated Indonesian sources and potentials of earthquake map which shows the possibility of new earthquake hazards potentials. This triggers the assessment of building’s vulnerability towards that new earthquake hazard potential. The assessment of building vulnerability towards earthquakes is divided into two types; quick check using Rapid Visual Screening (RVS) and thorough check. In its development, RVS method was chosen because it does not require a lot of personnel, reduce time for survey, and requires lower research costs. However, RVS method that uses manual form is considered less effective for buildings with a large numbers. Nevertheless, with the existence of RViSITS android application which has developed by ITS’s RVS Team based on FEMA 154, the assessment of building vulnerability and the result can be done and accessed by all sectors quickly and easily. This article aimed to assess the vulnerability level of three high-rise buildings (8-15 floors) in East Java using RViSITS android application by comparing the result of numerical analysis based on earthquake regulations applicable in Indonesia according to SNI 1726:2012. The result of analysis using RViSITS showed that the level of vulnerability of three high-rise buildings studied is “qualified” or earthquake safe. Based on numerical analysis, it shows that the control result of base shear, mass participations, structure periods and driff control are appropriate as required by SNI 1726:2012. Generally, RViSITS can be used to map the vulnerability of high-rise buildings throughout the region in Indonesia.
Study of Fabric Movement and Influenced of Drape Measurement Based on Image Processing Using MATLAB
Authors: Sukendar D , Totong T , Putra V G V 
Published: November 2019

Abstract
Generally, Drape meter for assessment of fabric drape is used in textile industry. In this paper, Image processing technique for measuring drape profile of apparel fabric has been studied and developed using MATLAB as well as modeled the fabric movement influenced of the fabric strength fort a certain mass. A modified method based on conventional drape meter was researched to determine drape parameter. Drape coefficient was selected to compare the conventional result (a standard device used in industry based on SNI ISO 08- 1511- 2004) and image processing result. In this research, a very good correlation has been found both conventional and image processing technique.
Simple Registration Software for Health Clinic
Authors: Kartika W , Fauziah F N , Wijaya N H 
Published: November 2019

Abstract
In this era, there are many people who lives on Earth. Many among them get sickness, for example influenza, cold, etc. Recovering the sickness they must go to a hospital or mini clinic. The focus of this research is how to solve to reduce the use of paper on a small clinic. Therefore, the small clinic has much outcome to cover the daily clinic operation. Usually small clinic the patients must fill a paper form to meet the doctor. Our research is to back up the paper- based fill form. We propose a new software using Visual Basic 2010. Our method use Visual Basic. NET 2010 programming language. Our research is to focus on Visual Basic 2010 to entry the patient’s data to Excel automatically. The advantages of this software is that we can fill the data form directly to the computer and then save them to the computer. The saving format from the computer is Microsoft Excel Format.
The Designing of Website-Based Learning Media as an Alternative for Online Learning for Student Practicing at SMKN 1 Sawoo Ponorogo
Authors: Yuda Y P , Azis M N L , Kurniawati I D 
Published: November 2019

Abstract
SMKN 1 Sawoo is a vocational high school that requires each student at a certain class level to do an internship. These activities require students to carry out these activities outside of school and of course the learning process does not stop completely. Therefore, we need a learning media that can help teachers in online learning. So that the learning process can continue. One of them uses website-based learning media. The website-based learning media at SMKN 1 Sawoo aims to help teachers and students in carrying out teaching and learning activities remotely. The research method used is the waterfall method. The media needed is a learning media website that can be used to deliver material and conduct learning evaluations. The material that can be delivered is of course multimedia based, which in addition to text can be in the form of images, videos and audio. In addition to being used for delivering material, this online learning media website can be used as a medium to do assignments given by each subject teacher.
Decision Making in Inventory Policy Determination for Each Echelon to Stabilize Capsicum Frutescens Price and Increase Farmers Share Value Using Discrete Event Simulation
Authors: Novitasari Nia , Setyawan E B 
Published: November 2019

Abstract
Capsicum frutescens is one of the vegetable commodities that can affect the dynamics of the national economy. The dynamics of the national economy is due to significant fluctuations in chili prices in Indonesia at all times. Price fluctuations occur due to lack of information either in the form of demand information or Chilean price information about consumers received by farmers for marketing red pepper. Besides, the length of the distribution of red pepper (farmer- the middleman- wholesaler- retailer- consumer) results in significant price changes from farmers to consumers at each echelon or distribution level. Such price changes result in a decline in the farmer’s share. Farmer’s share has a negative relationship with marketing margins. the negative relationship is the higher the marketing margin, the lower the share received by the farmer. from the explanation, the concept shows that the victims of the length of the distribution channel are farmers and consumers. Where farmers will bear a high business risk, and consumers will get high chili prices. The research will discuss how to stabilize the price of red pepper and improve farmer’s share by making the best decision using discrete simulation using Monte Carlo, so it can determine the supply policy by the distribution at each level aimed at reducing the operational cost. Besides, this can also reduce the hoarding activities undertaken by the relevant distribution. The hoarding can disrupt the stability of the existing chili price.
Elayah: Mobile Based Media For Al-Qur’an Memorization Using Takrar Method
Authors: Pradhana F R , Musthafa A , Harmini T , Dedy Setiawan M 
Published: November 2019

Abstract
As a pesantren based campus,University Of Darussalam Gontor requires their student to memorize Al-Qur’an as part of learning activities. However, the facts shows the level of memorization of students has not been able to achieve the target. This media aims to help students improve the quality of memorizing Al-Qur’an with practical features in a mobile application. This media uses the takrar method which has been used since the time of the Prophet Muhammad S.A.W. The takrar method is used by repeating the reading 40 times each sentences. This media based on mobile android application and created using waterfall model. Testing is done in two ways, the suitability of the application with an Android devices that shows the suitability of a device measuring at least 5 inches, and the distribution of questionnaires to the examiner or Muhafidz resulted in the suitability of the functions and materials as much as 93%, and the average value of students as much as 97.3% in terms of ease of use. The results of the questionnaire indicate the suitability of the media to the user needs.
Improving The Ease of Digital Marketing Learning Using Mobile Learning
Authors: Kurnianti A , Erfiana M , Wijaya T W 
Published: November 2019

Abstract
Digital marketing is a new way of advertisement that has been in high demand by the public lately. Slowly, people are beginning to abandon conventional marketing methods and switch to digital marketing. But in general, they are self-taught. People who sell online really need digital marketing concepts to increase their understanding. If knowledge increases, marketing success increases. The main obstacle for people to get digital marketing courses is limited time and cost. Many digital marketing courses are offered but at high prices. In this study, we develop the digital marketing learning model that uses mobile technology and feedback learning method. By using this technology, people are expected to be able to increase their knowledge of digital marketing principles at any time at a very affordable cost. In this module, there are four main themes presented interactively, namely think, create, engage, and optimize. We design the mobile content using revised Bloom’s concept that divided into four knowledge domains: factual, conceptual, procedure, and metacognitive. Along the learning process, the students are under monitoring, evaluating, and supervising their teacher. The results of the study show that mobile learning shows very attractive and exciting. The interesting finding in this research that the feedback part of the teaching is the most significant influence on student performance.
Work posture analysis of gamelan craft center workers using quick methods of ergonomic risk assessment
Authors: Rahma R A A , Faiz I 
Published: November 2019

Abstract
Gamelan craft center in Ponorogo Regency has many hazard factors and risks, one of which is ergonomic risk factors. Workers do work with bent postures, awkward postures, and frequent repetitive movements for a long time. This research aims to analyze the work posture of gamelan craft center workers using quick methods of ergonomic risk assessment. This research used the observational analytical study. Analysis of the work posture by using three methods are Rapid Entire Body Assessment (REBA), Rapid Upper Limb Assessment (RULA) and Quick Exposure Checklist (QEC). Eight jobs were selected are divided into two task elements: the dominant task and risky task. Analysis of the research data using the Friedman non-parametric test. The result of work posture analysis shows that the final score in the three methods gets a high-risk level that is 56.25% (REBA), 43.75% (RULA), and 62.50% (QEC). Friedman test results showed the value of Chi-Square = 13.630, and the significant score is 0.003 (p < 0.05). So it can be concluded that the three ergonomic risk assessment methods have different effectiveness. Quick Exposure Check (QEC) is the best method among all three methods for the ergonomic risk assessment of gamelan center workers.
The Use of ISO and COBIT for IT Governance Audit
Authors: Aprilinda Y , Puspa A K , Affandy F N 
Published: November 2019

Abstract
along with the growing number of practices in the use of technology for business processes, there is a need for IT governance for the private and government sectors. Company leaders implement IT governance in order to ensure that the investment spent by the organization for IT can provide benefits or optimal value for the organization and reduce the lowest risk possible. In practice IT governance requires standards. There are several standards that are often used the most popular are COBIT and ISO, both of which are known as IT governance best practices, but can any company apply the two standards? In this paper we will discuss the use of COBIT and ISO in corporate governance, the strengths and weaknesses of each standard and the merging of the two standards for more comprehensive governance practices.
Development of Qur’an Memorization Learning Model Based on Mobile Learning
Authors: Purbohadi D , Rahmawati B RN , Setiyawan H 
Published: November 2019

Abstract
Memorizing the Qur’an is the Sunnah of Prophet Muhammad, may peace be upon him. The most crucial part of remembering the Quran is the process of learning. In general, this activity is conducted privately memorizing, one teacher for one student. One obstacle of memorizing the Quran is the limited number of teachers and many students. This private model undoubtedly ineffective. The teacher is difficult to handle the activities. Also, the teacher cannot control the student to memorize more verses because teachers must hear one by one to the student’s reading voice. Information technology has the potential benefit to innovate the learning models of memorizing the Quran. In this study, we develop a learning model using mobile technology. We design mobile learning that students can memorize independently; however teachers can still listen to reviews their reading sample, evaluate, and give guidance. The student module comes with a paragraph of verse view, including the translations. The student module also features a reading reference from international Qori. Besides that, the student module comes with a voice recording facility so students can compare with the reference reader. Teachers can assess every student until students good in reading and more verses to memorize. The primary findings of this study indicate that the teacher can handle more with better student performance. Students are highly motivated to memorize and self-evaluate their reading because they always feel under supervising by the teacher.
A Hybrid Approach on Single Image Dehazing using Adaptive Gamma Correction
Authors: Putra O V , Musthafa A , Pradhana F R 
Published: November 2019

Abstract
Since the last eruption of Mt. Kelud, a surveillance has been conducted using camera to observe the crater lake and its surroundings. The key point of this observation is based on the captured haze-free images. However, these images suffer from hazy condition because of degassing. Degassing obscures the camera vision so that the observer barely maintain to keep track of lake phenomenon. Furthermore, even many dehazing techniques have been proposed to tackle this such problems, it still leaves some other problems such as oversaturation, color distortion, and halo effects. In this paper, a hybrid method is proposed. This work incorporates two the state-of-the-art visibility restoration and contrast enhancement methods which are color attenuation prior (CAP) and adaptive gamma correction (AGC). This method is separated into three different modules. They are disparity estimation (DispE) module, transmission map enhancement (TME) module, and hazy image restoration module (ImRec). The DispE module adapts the color attenuation model for its powerful depth estimation for handling outdoor image. Subsequently, the TME module is enhanced using AGC. And the last module is calculated from the modified hazy model. The experimental results are quite impressive. It is able to maintain edge and minimize image distortion qualitatively. And the fog density measured with Fog-Aware Density Estimation (FADE) estimated at 1.448.
The impact of geogebra classic application on learning geometry
Authors: Triwahyuningtyas D , Rahayu S , Agustin W D 
Published: November 2019

Abstract
This study aimed to identify the impact of Geogebra Classic application towards geometry learning outcome of fifth graders. The method employed was experimental research using Non-equivalent Control Group Design. Serving as the subjects of this study were students of fifth grade in an elementary school in Malang, Indonesia. The data were required through statistical tests and analyses through SPSS 21.0 for Windows. The results of the study showed that the average difference of the score of fifth graders after having treatment of using the application were 66.4 for the pre-test and 81.2 for the post-test. In the meantime, the t-test on the study revealed that the value was 0.002 < 0.05 meaning that the hypothesis was accepted. This indicated that there is an impact of the use of Geogebra Classic application on geometry learning outcome of the fifth graders. Therefore, it can be concluded that Geogebra Classic application was able to help students understand geometry-related learning materials.