bluuebunny/crossref_metadata_2025_split huggingface dataset:
Risk factors analysis of constipation in patients with acute coronary syndrome
Authors: Zukhri S , Setianingsih  , Hastuti R Y , Setyaningsih I 
Published: May 2020

Abstract
Pathophysiologically, patients with the acute coronary syndrome (ACS) are at risk of constipation. This study was aimed to determine the relationship of age, fluid intake, fiber intake, use of sedatives, and mobilization status with the occurrence of constipation in patients with ACS in intensive care unit (ICU). Thirty ACS patients (21 male and 9 female, aged 45 to 74 years who were treated in the ICU of PKU Muhammadiyah Delanggu Hospital, Klaten, Indonesia, in November - December 2018, were observed for 3 consecutive days from the initial admission to ICU. Data were analysed with the binary multiple logistic regression tests at 95% confidence level. Multivariate analysis showed that fiber intake (p=0.025, RR=26.675, CI 95%= 1,498-474.996), fluid intake (p=0.044, RR=21.332, CI 95%= 1,093 –416.328) and immobilization (p= 0.012, RR = 15.466, 95% CI =1.068-349.989) were significantly correlated to the occurrence of constipation with Negelkere R2 = 0.80, whereas age and used of sedative were not. It was concluded that lack of fiber intake, lack of fluid intake, and immobilization were the risk factors for the occurrence of constipation in ACS patients and contributed of 80.3% the occurrence of constipation in ACS patients, whereas of 19.7 % influenced by other factors were didn’t study in recent research. However further research needed to be done with a larger of sample size.
Spectrum properties of self-adjoint operator
Authors: Ekayanti A , Indrati C R 
Published: May 2020

Abstract
In this paper, we discuss about spectrum properties of self-adjoint operator. Relation between self-adjoint operator and normal operator is used to show that the spectrum of self-adjoint operator is subset of ∝. Furthermore, by using norm properties of bounded-linear operator and real polynomial we derived the relation between spectrum and norm of operator polynomial.
Edutainment with video scribe in thematic learning
Authors: Shalikhah N D , Mardiana ANDT 
Published: May 2020

Abstract
A teacher is required to be able to create a conducive learning situation, fun and can motivate students that will have a positive impact in the achievement of learning outcomes. Specific objectives from this research are 1) applying the edutainment-based learning model with video scribe on thematic learning at MI Muhammadiyah Rambeanak 1 Magelang Regency; and 2) packaging a scientific approach in the form of the observing, asking, trying, analysing, and communicating method in thematic learning can be carried out through video scribe. The long-term goal of this research is to improve the quality of elementary school. The data collection of this research are document studies, observations, interviews, forum group discussion, and questionnaires to find out students’ opinions. The results of this study are 1) creating an edutainment atmosphere in thematic learning using video scribe which is seen from the results of the student opinion questionnaire which states 82.3% pleasant atmosphere, 83.3% conducive learning environment, 81.4% attracts interest, and 79.6% involves all the senses and mind; and 2) thematic learning using a scientific approach in the form of the observing, asking, trying, analysing and communicating method can be carried out through video scribe.
CFD analysis of vertical axis wind turbine using ansys fluent
Authors: Afif A A , Wulandari P , Syahriar A 
Published: May 2020

Abstract
Renewable Energy Resources are increasing in a few years, this is due to the increasing increase in environmental pollution and fossil fuels which are increasingly depleted. Both bridges and toll roads actually have wind speeds that can be used and used as electricity. But there is a problem to put the power plant on the bridge or the toll road, which is quite limited land, so to install the Horizontal Axis Wind Turbine will be very difficult. Therefore, Vertical Axis Wind Turbine is used as an alternative. VAWT is used to create power plants that can use wind from vehicles on toll roads and bridges to make electricity. To be able to take advantage of the wind around the place, Computational Fluid Dynamics (CFD) is needed to optimize the design of the turbine.
West Java tourism geographic information system design using adobe AIR
Authors: Suhendi  , Rahmah A 
Published: May 2020

Abstract
Google can be maximized with applications that can facilitate the direct location of tourist destination. The introduction of problem is no West Java tourism application using Adobe Flash, so the researchers take the theme Designing West Java Tourism Geographic Information Systems Using Adobe AIR. The purpose of this study is to assist the government and people in Indonesia using mobile application to reduce time efficiency in finding tourist location maps and information about tourist attractions in West Java and as the places to help tourists. The application will increase the regional income to visit attractions / tourism in West Java. The research methods carried out in this study use the Rapid Application Development method. The most important process is planning, user design, construction, and cutting needs. The design steps to create a navigation menu consisting of maps of West Java that can be connected directly with GPS and google maps. The next stage is the development with a combination of action script 3 programming, images, and the export process to the apk file. The testing process is done using a cell phone that is connected to GPS and has been installed on Google Maps and Adobe AIR. Conclusions obtained by the application successfully designed with 100% test results successfully run on android-based mobile devices.
Android based learning application for Wudhu and Tayamum using augmented reality technology
Authors: Dewi S P , Astuti I P , Buntoro G A , Widaningrum I , Yusuf A R 
Published: May 2020

Abstract
Nowadays, wudhu and tayamum are widely found in various media such as books, articles, tutorial videos and internet. Muslims who are new to Islam as children often have difficulty reading books to understand how to learn and practice tayamum, one of the lessons learned in technology development using Augmented Reality based learning. The learning method used in Augmented Reality is the marker method. The marker method step is that the program will read an object from the image marker, the marker uses a downloadable image by clicking the Download Marker button in the main menu, and then it will be displayed as a moving object or an output in the data. This app is implemented for Android-based smartphones, with the help of Blender 3D and Unity 3D software. The results of the questionnaire count conclude that augmented reality learning media applications are easy to use, practical, useful, and effective in supporting children’s learning activities as children become more engaged in learning. The attractive interface design makes kids feel comfortable and engaging as they use it and develop their understanding. In addition, this application is also used as an interactive learning medium.
Usability evaluation of university website: a case study
Authors: Sukmasetya P , Setiawan A , Arumi E R 
Published: May 2020

Abstract
Web-based public services become an important part in supporting the success of a university, but there are still many difficulties to use it. This study was conducted to evaluate whether Muhammadiyah Magelang University website has had the acceptability criteria of usability testing. The study was conducted using a questionnaire as a research instrument that consisted of 17 questions and filled by 95 respondents. Those questions grouped into five variables usability, there are learnability, efficiency, memorability, error, and satisfaction. Based on analysis, the result said that the mean score of overall usability testing to measure website usage Muhammadiyah Magelang University website was 2.77, for each variable the Learnability aspects have the overall score of 2.83, the efficiency was 2.73, memorability was 2.82, an error was 2.65 and 2.79 for satisfaction by respondents. From these results indicate that the website of Muhammadiyah Magelang University already Quite Easy to use. However, there are still many things that need to be fixed, especially in case of errors, focused on the availability of the feature and efficiency aspect in the speed of accessing the feature for getting information.
Development of learning material of integer and fractions based on interactive multimedia with Islamic values
Authors: Ahmad J , Handayani I I , Rizki S 
Published: May 2020

AbstractThe objective of this study was to produce learning material of integer and fractions based on interactive multimedia with Islamic values that valid and practical. The type of this research was Research and Development (R & D). The model used 4D (Define, Design, Development, and Disseminate). The research subjects were 10 students of Junior high school of Muhammadiyah 1 Metro. The instruments used expert validation assessment questionnaires to determine the feasibility of the product and questionnaire responses of students to find out the practicality of the product. The results of the percentage analysis of expert validation were obtained on average, that is, 83.54% with very feasible categories. As for the results of the students’ response trials, the average percentage was 87.41% with a very practical category. Therefore, it can be concluded that learning material of integer and fractions based on interactive multimedia with Islamic values were very valid and practically used for learning.
Preliminary design and soil moisture sensor yl-69 calibration for implementation of smart irrigation
Authors: Setyowati I , Novianto D , Purnomo E 
Published: May 2020

Abstract
Smart irrigation as one of implementations of the Internet of Things (IoT) in agriculture aims to control and monitor water supply in accordance to crop needs. The control systems are designed using the Arduino Nano platform and the soil moisture sensor YL 69. The accuracy of the sensor is very influential on the performance of the control system, so that sensor calibration is done before it is applied to smart irrigation. The calibration method used in this research is the Gravimetric Water Content method. The media used in calibration is a mixture of soil and sand as Smart Irrigation as one of the implementations of the Internet of Things (IoT) in agriculture aims to control and monitor water supply in accordance to crop needs. The control system is designed using the Arduino Nano platform and the soil moisture sensor YL 69. The accuracy of the sensor is very influential on the performance of the control system, so that sensor calibration is done before it is applied to smart irrigation. The calibration method used in this research is the Gravimetric Water Content method. The media used in calibration is a mixture of soil and sand as much as 5% of the soil. Water weighed 4.71% from soil weight added to increase soil moisture level in calibration process. Based on the calibration results obtained from the sensor reading 201 shows 18.31% of soil moisture in dry soil. With nine times of water addition to soil obtained soil saturation point to water with sensor reading 633 which shows result 61.91% of soil moisture. The experimental results show the polynomial curve of order 3
Analysis of braking force efficiency measurements for various braking strategy applied for vehicle tested on roller brake tester
Authors: Firdaus R M , Supriyo B , Suharjono A 
Published: May 2020

Abstract
Roller brake tester is a kind of vehicle braking system test equipment to test the braking force for each vehicle axis and its efficiency. This study aims to analyze the vehicle braking force efficiency due to application of three different braking actions: sudden braking, gradual braking and intermittent press release braking, tested on the roller brake tester. The vehicle used for testing is a type of passenger vehicle weighing of about 1400 kg. The results show that the highest braking force efficiency of about 44% occurs when sudden-braking is applied, while for the lowest braking force efficiency of about 40% occurs when the loose-press braking is applied.
Preliminary sandstone reservoir depth prediction with pre-processing data using principle component analysis (PCA) and partial least square (PLS) based on well logging data attribute
Authors: Utami E , Purnomo M H , Rizki R F , Biyanto T R 
Published: May 2020

Abstract
Sandstones containing 60% of oil or gas because of porosity and permeability. The conventional method required sandstones predicted with complete data. This study used neural networks to determine the depth of sandstones and predict incomplete variables well site at the Sunda Strait-south area. Data pre-processing used PCA-PLS to find the most important variables that affect the output thus improving the prediction results. Multicollinearity analysis is used to determine the data compression needed. Raw data multicollinearity result showed that the multicollinearity occurs indicated with VIF over 10 and tolerance under 0.1 at CALI and SP variables. The PCA-PLS analysis uses to reduce data from 13 variables into six important variables namely DEPT GR RHOB NPHI ILD Peff, these results do not experience multicollinearity. The variable that predicted is ILD with the best ANN multilayer perceptron showed small standard deviation and standard error results 2.85 and 0.03. The best ANN model to predict the depth of radial basis sandstone is due to produce a regression test of 0.8 based on the results of the validation of the log image.
Catalytic isomerization of n-hexane over beta (BEA) zeolite by dry-gel convention (DGC) and hydrothermal (HTS) methods
Authors: Pusparatu  , Sugi Y 
Published: May 2020

Abstract
Catalytic Isomerization of n-hexane over Beta (BEA) zeolite synthesized by dry gel conversion (DGC) and hydrothermal (HTS) methods were studied. The isomerization was influenced by types of synthesized methods, and combined selectivity for branched alkanes (2- and 3-methylpentanes, 2,2-dimethylbutane, 2-, and 3-methylbutanes, 2,2-dimethylpropane, and 2-methylpropane) decreased in the order: BEA (DGC) > BEA (HTS). BEA synthesized by DGC had the highest activity and selectivity for the isomerization, and BEA Synthesized by HTS has the highest activity for cracking to lower alkanes and alkenes. These differences are ascribed to the difference of surface area, pore volume, acid properties, and reaction parameters.
Implementation of the level of detail method on augmented reality android-based applications
Authors: Syaputra R A , Widiyanto A 
Published: May 2020

Abstract
Many 3D games and applications use augmented reality technology in smartphones. When an application or game is running, it will increase The Workload of The Processor which is signed by the heat of The Smartphone. The processor and battery temperatures increase due to heavy workload of processor. This study uses the Level of Detail-method to reduce the detail of 3D objects from the Augmented Reality application. 3D objects that appear on the smartphone screen are adjusted to the distance of the camera to the marker. The distance of the camera to the marker triggers the change of details so that the processor workload decreases. The test results show that the average Workload Processor is reduced by 10,47% and the temperature decreases by 0.94°C.
Blog-based mathematics learning devices
Authors: Ismail  , Fitriani  , Takdir  , Sudirman P , Umar  
Published: May 2020

Abstract
The development of science and technology today requires learning science and technology-based innovation. Educators must be able to innovate learning by utilizing the internet. Blog-based learning is important as an alternative learning. The purpose of this research is to produce a valid, practical and effective blog-based mathematics learning tools developed consist of RPP, Modules, and the Mathematics Learning Blog. This research is a research developed. The development model used is the ADDIE model (Analyse, Design, Development, Implementation, Evaluation). The subject of the research was grade X students. Based on the results of the development it was obtained that the result of blog-based mathematics learning that were developed met valid, practical, and effective criteria.
Real time optimization of low temperature shift converter of carbon monoxide in an industrial ammonia plant
Authors: Agnesty S Y , Niam H H , Wahyudi M A , Yulyana M , Sriana T 
Published: May 2020

Abstract
The main goal of this work is optimize low temperature shift converter (LTS) of Carbon Monoxide (CO) in an Industrial Ammonia Plant considering life time of the catalyst in that converter. Shift converter is a reactor to convert CO into carbon dioxide. CO in ammonia plant comes from steam reforming process that convert natural gas into hydrogen gas. This process will also produce CO gas, where CO gas is toxic to the catalyst in ammonia syntesis reactor and also able to oxidize Fe in ammonia synthesis that is the reason why CO is one of component that can interfere the ammonia gas manufacturing process. To prevent this, the CO gas purification process needs to be done, one of the method is using shift converter process. From the optimization of several operating conditions in low temperature shift converter, a relatively strong correlation is found between flow rate feed and average temperature bed catalyst with the lifetime of the catalyst. The optimization result show that the optimum flow rate feed in LTS is 2754.49 m3/day and average temperature bed catalyst is 224°C. Operating at the proposed optimal condition increases life time of the catalyst about 8.02% per year.
Coastal environment baseline on Seloko Island, Batam City, Indonesia
Authors: Mubarak  , Badrun Y , Retnawaty S F 
Published: May 2020

Abstract
Seloko Island will be made part of the Batam Island industrial area. This will have an impact on environmental conditions on the island. The purpose of this study was to determine the general condition of the Seloko Island ecosystem. Observed environmental components included: water quality, sediments, mangrove vegetation, seagrass, coral reefs and sediments. The results showed Dissolved oxygen concentrations ranged from 6.5 to 73.3 mg/l; PH ranged from 7.5 to 7.9; Salinity averaged 33.3‰; temperatures ranging from 29.8-30.4°C. Sedimentation, dominant sand. Mangrove diversity consists of Avicennia Alba, Sonneratia alba, Rhizophora apiculata, Rhizophora mucronata, Rhizophora stylosa, Bruguiera gymnorrhiza, Xylocarpus granatum, and Nypa fruticans. Seagrass cover ranges from 0 to 2.75% with one species, Enhalus acoroides, which describes the condition of seagrass that is not good. Cover of coral reefs ranged from 0 - 0.67%, which illustrates the condition of corals that are not good.
Calibration of pH and oxygen sensors applied to aquaponic system
Authors: Novianto D , Prajoko S , Setiyowati I , Purnomo E 
Published: May 2020

Abstract
Majority of agricultural activity in Indonesia still relies on rainwater for irrigation. In the dry season, there are many non-productive agricultural lands. It leads to decrease in farmers’ income. To solve this problem, Aquaponic Planting System was offered, but the system is complicated. It needs adequate oxygen and proper pH to make nitrification bacteria alive to convert NH3 to NO3- and NO2. Therefore, a system which controls oxygen and pH is needed. For pH calibration, a curve fitting method was used to get an accurate measurement. For oxygen calibration, saturated dissolved oxygen water was used. It was obtained using a Potentiometric method. Moreover, Simple Moving Average was used to get a stable reading.
Decision support system for determining thesis supervisor using analytical hierarchy process (AHP) method
Authors: Arumi E R , Setiawan A , Primadewi A 
Published: May 2020

Abstract
The determination of lecturers is important to facilitate the selection of lecturers in accordance with lecturers’ expertise and titles proposed by students. Currently, the assignment of determining the thesis supervisor is usually determined by the Head of Study Program, in the process of determining still using a conventional way by relying on personal knowledge. Often occurs less than an optimal decision, where the appointed lecturer, the field of expertise is less precise with the title of the proposed student thesis. Based on the above problems, it takes a solution that can consider the field of lecturer expertise in accordance with the criteria for determining lecturers, lectured subjects, conformity of thesis title topics, and duration of guidance. Data is processed from Google Scholar extraction, Letter of Decision of teaching each semester, student thesis title submissions, long guiding students, followed by Analytical Hierarchy Process (AHP) method, highly effective and structured method. The result obtained by the largest eigenvector value is 32% means that the proposed title of the proposed thesis is the variable that has influence on the determination of the lecturer, followed by the lecturer’s research interest with 30%, the lecture taught by the lecturer with 28% and the last criterion determine the supervisor is the old lecturer has guided by 8%.
A case study on possible radiological contamination in the Lo Uttaro landfill site (Caserta, Italy)
Authors: Ambrosino F , Stellato L , Sabbarese C 
Published: May 2020

Abstract
The prevention of radioactive pollution is a primary objective of environmental protection codes in the operation of solid waste landfill activities. Several studies have demonstrated the effectiveness of radiological monitoring of the main constituents of urban landfill waste. The present contribution reports on an investigation plan carried out to evaluate the possible radiological contamination in the municipal landfill Lo Uttaro, district of Caserta (Italy). The investigation focused primarily on the perimeter area of the landfill in order to assess the possible impact on the surrounding population. The results of measurements of the equivalent dose rate along the perimeter of the landfill show average values lower than the population dose limit due to natural background radiation. Several samples of soil, groundwater and leachate representative of the subsoil of the study area were collected and the radionuclides were measured by gamma spectrometry. The results of these measurements show the absence of artificial radionuclides, except for small amounts of 137Cs due to nuclear disasters occurring in the last 50 years on Earth, and the mere presence of 40K and other natural radionuclides belonging to natural radioactive chains of 238U, 235U and 232Th.
Leaf water diffusion dynamics in vivo through a sub-terahertz portable imaging system
Authors: Girolamo F V Di , Toncelli A , Tredicucci A , Bitossi M , Paoletti R 
Published: May 2020

Abstract
The development of terahertz based technology has given the opportunity for the realization of non destructive techniques capable of gaining meaningful information on delicate systems such as biological samples. Here, the health status of leaves in vivo has been monitored through a portable terahertz imaging system. The data have been extracted and analysed from the images acquired and compared with analogous results reported in the literature on similar systems. The possibilty of extracting additional information from the images regarding leaf details has also been explored.