bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Study of Gum Arabic as Surfactant on the Stability of Water-based Alumina Nanoparticle Suspensions
Authors: Nurdin Irwan , Zulkifli  , Satriananda  , Nurlaili  
Published: June 2019

Abstract
The stability study of alumina nanoparticle suspensions has been investigated by using gum arabic as a surfactant. The effect of particle volume fraction of alumina nanoparticle and gum arabic concentration were observed. The stability of the suspension was characterized using zeta potential and particle size distribution analysis. Several volume fractions of alumina and gum arabic concentration were dispersed in water as a solvent for suspension stability. The result showed that the stability of water-based alumina nanoparticle suspensions was increase with the decreasing of particle volume fraction and increasing of gum arabic concentration. The particle size distribution was narrow with decreasing particle volume fraction and increasing gum arabic concentration. The hydrodynamic diameter of the particles was smaller with the increasing of gum arabic concentration. The smallest particle size recorded was 164.6 nm at 0.5% gum arabic concentration. Zeta potential values were increased with the increasing of gum arabic concentration. The highest zeta potential was recorded at -36.0 mV. It can be concluded that gum arabic can be used for stabilization of water-based alumina nanoparticle suspensions.
Minimizing Embankment Slope of Rear Parts to Overcome Leakage
Authors: Gani Fauzi A. , Kurniati  
Published: June 2019

Abstract

The surrounding area of the river Kr. Pandrah is an area that every five years’ experience flooding. The biggest flood in 2006 has been classified as natural disasters and has destroyed public property around the area Pandrah. For that, we need a study to get an alternative to overcome. Based on the survey data and information from multiple sources and analysis of the existing condition in 2006 that the highest flood ± 0.60 m, using the HAC-RAS program obtained the largest discharge of 350 m3 / sec. River cross-section is modified into a compound with a wide cross-section of the river is still based on the existing width. The width of the left and right banks of 5 meters from the riverbank and the embankment crest width of 3 meters with a slope of 1: 1 Testing the stability of the embankment is done by using the program Geo-Slope method Bishop Grid and Radius way obtained a safety factor during the development of downstream 2.146, 2.143 upstream development, steady seepage 1.667 downstream, upstream of the steady seepage 1.183, 1.597 rapid drow down upstream and downstream rapid drow down 1,682, all the figures were below the standard security numbers. But after the biggest flood in 2016, the high embankment and duration of inundation occur above the initial predictions, so there is some point leak embankment. For further improvement can be made by reducing the slope angle of the back or make drainage embankment.
Performance of MIMO and Relay Communication System using TGn and HH Channel
Authors: Hanafi  , Hendrantoro G. 
Published: June 2019

Abstract
The research on relay communication systems and MIMO has been done by researchers. Both systems have advantages in increasing the system performance and capacity. While the OFDM transmission technique has the advantage to avoid ISI from receiving signals. Systems are simulated to obtain BER as a system performance parameter and determine the increase in BER due to the use of a relay and 2 antennas in communication systems. Systems are compared between relay system with the non-relay system, where both systems are simulated too for using 2 antennas and 1 antenna. Messages are sent using the OFDM technique over TGn and the HH channel. Systems with 2 antennas use the Alamouti scheme. Received messages are combined using MRC, and the original messages are detected using an ML detector at the receiver. The increase in BER obtained between relay systems compared to non-relays is 1.69 and 2.02 times when using 1 and 2 antennas on Eb/No = 9 dB. Increased BER also occurs between 2 antenna systems compared to system 1 antenna, which is 79.71 times in non-relay systems and 94.93 times in relay system on Eb/No = 9 dB. From these results, it can be seen that there is an increase in BER in the use of a relay and 2 antennas in the system. The BER system that occurs, both using the TGn channel and the HH channel, shows relatively the same results.
Genetic Algorithm as a Solutions Optimization of Tilt Angles for Monthly Periods of Photovoltaic Installation
Authors: Yassir A 
Published: June 2019

Abstract
Changes in the sun’s declination angle, every month for one year affect the energy received by a photovoltaic (PV). Changing the tilt angle, every month to follow changes in sun declination needs to be done so that the energy produced by PV is more optimum. Genetic algorithm (GA) was proposed in this study as the optimal PV slope solution every month of the year. GA calculates the slope angle of PV by calculating changes in sun declination, the movement of the sun from east to west, the coordinates of the location of PV installation, direct radiation and diffuse radiation. GA initializes tilt angle PV with the specified limit, then calculates to get the optimum total energy value on the inclined plane that PV can accept with the crossover, mutation and selection process. Algorithms are limited to 50 generations. The results showed that the optimization of the monthly period slope was better than the annual period. Installation with a slope angle after the monthly period optimization has increased the energy received by solar panels by 12 kWh/m2-year compared to installations with the slope of the annual period of optimization.
Papain Enzyme and Lemon as Coagulants in Cottage Cheese
Authors: Fachraniah  , Rihayat Teuku , Zaini Halim , Nita Desi , Fazil Muhammad 
Published: June 2019

Abstract
Cottage cheese is one type of cheese that is processed without ripening, which is made from milk coagulated using lactic acid bacteria or rennet enzyme. Another alternative as a substitute for rennet is the papain enzyme and lemon juice. This study aimed to access the influence of enzymes concentration and pasteurization temperature to the yield and quality of cottage cheese while lemon juice as fixed variable . Papain enzymes are isolated from immature papaya fruit sap, mixed with sulfite, the emulsion of gum is dried using vacum oven to become crude papain, and lemon juice obtained from ripe lemon fruit. Cottage cheese made by pasteurization of fresh cow milk, addition papain enzyme and lemon juice, stirring, and the curd is separated. Analysis products are included the percentage of curd, lactic acid, protein content, water content and texture. The best results showed that from 200 ml of fresh cow milk obtained at 0.5% enzymes and 50°C with a weight of curd 30.16%, lactic acid 0,16%, dissolved protein concentrations 375.61 mg/l, and 5.33 g in texture.
A Prospective of Coal Fly Ash Conversion to Mfi Membrane for High Grade Biofuels Purification
Authors: Jufriadi  , Saputra Hens 
Published: June 2019

Abstract
MFI is a structure of aluminosilicate zeolite mineral belonging to the pentasil family of zeolites. The current paper focuses on preparation of MFI zeolite from coal fly ash by hydrothermal process. Coal fly ash was utilized as the sources of silica. The as-synthesized zeolite was characterized by X-ray diffraction (XRD) to identify the structure and microstructure morphology observation by Scanning Electron Microscope (SEM) and adsorption-desorption analysis using nitrogen at 77 K. This kind of zeolite has a highly prospective to increase the purity of ethanol from technical grade become the fuel grade, catalyst, molecular sieve and adsorbent to reduce the emission gas.
The Biomass-based Desalinator Performance in a Vacuum System
Authors: Munawar  , Majuar E 
Published: June 2019

Abstract
The biomass-based desalination system has several problems in its application, including wasteful energy consumption in feed water evaporation systems. If weaknesses can be corrected, this desalination system is predicted to have promising applicability prospects. This study aims to develop a renewable energy based desalinator focused on modification of the evaporation system, biomass preparation, and also a study of desalinator performance. The study was carried out in a batch and continuous manner, where brackish water was fed to the desalinator, by varying the quantity of feed water, cooling water rate, and system pressure. As a response variable, it is determined that fuel needs, clean water production capacity, and the quality of water products produced the results showed that the water production capacity was influenced by cooling water flow rate, feed volume, feed discharge, and system pressure. In general, the fact is that the rate of condensate production increases with the increase in the variable. The use of a vacuum system is proven to be able to improve system performance, where the condensate production capacity can be increased from 4.165 ml/minute in the atmospheric system to 6.912 mL/minute in a vacuum system. This desalination system turned out to be able to improve the quality of brackish water, from non-potable water to water that meets drinking water quality standards in accordance with RI Minister of Health Regulation No. 492 of 2010.
Preparation and characterization of Pd93Cu7/Al2o3 composite membrane for hydrogen permeation
Authors: Sari Ratna , Mulyati Sri , Dewi Ratni , Hakim Lukman 
Published: June 2019

Abstract
In this work, an electroless plating technique was used to prepare Pd-Cu coated ceramic alumina membranes tube. The composition, surface morphology and cross-section of the Pd97Cu7/Al2O3 membrane is investigated by energy-dispersive spectrometry (EDS), and scanning electron microscopy (SEM). Hydrogen permeation and selectivity across a membrane is measured using pressure difference (1.05-1.5) at a temperature range (573-773 K). The reported membrane obtained a high flux of 3.4 mol H / ms at a temperature of 723 K, while the selectivity is above 75 for H2 / N2.
Variation of SikaBond use on connection with 450 angle on flexed beam on normal concrete
Authors: Aiyub  
Published: June 2019

Abstract
This concrete aims to know the effect of SikaBond additive material on concrete connection. Made three types of testing of the shear strength, tensile strength and flexural strength of the connection. For flexural tests measuring 15 x 15 x 75 cm with 45° grafting angle, shear strength and tensile strength with size of 5 x 10 x 20 cm which are both bonded. The planned concrete quality of F’c 22.5 Mpa, ACI method of modifying Fas value 0.5, Slump value 93.33 mm. Strong flexure without voltage connection 34.69 Kg / cm2, beam grafting with the addition of a voltage cycles of 32.92 Kg / cm2. Voltage beam with the addition of cement water 38,41 Kg / cm2. The comparison of the shear stress test voltage of the cementless joint of the cement is 15.57 Kg / cm2, the beam which is grafted with the addition of a 12.48 Kg / cm2 voltage cyclone, decreased by 19.81% from without cement. The beam stress with the addition of cement water of 9.60 Kg / cm2 decreased by 38.34%, the cementless block. The connection with the addition of a stronger cyclone retains a shear force than the junction of water. Comparison of tensile strength test of cement tensile strength without cement connection 3.67 Kg / cm2, beam grafting with addition of 3.15 Kg / cm2 voltage SikaBond decreased 14.18% from without cement. The beam stress with the addition of 2.88 Kg / cm2 of cement water has decreased by 21.46% of the beam without cement connection. The connection with the addition of a stronger cyclone retains tensile strength than the connection with cement water at 28 days.
Edge Detection Based on Quantum Canny Enhancement for Medical Imaging
Authors: Widiyanto S. , Sundani D. , Karyanti Y. , Wardani D.T. 
Published: June 2019

Abstract
The cancer or object detection on image Computed Tomography, X-Ray, and Mammography often use segmentation methods. The most common segmentation method used is based on edge detection. The edge detection method which is proposed in this study is Quantum based with Canny operator. The quality improvement of edge detection results is emphasized on the method to generate the gradient magnitude value which is done by observing the strength of neighbour pixel values. The strength of this pixel is obtained by calculating the pixel change value and the distance of neighbour pixels to the centre pixel. The results of the implementation show that the proposed method produces a better PSNR value than the original Canny, Sobel, Robert, and Prewitt Operator.
Modeling System Test of English as a Foreign Language as a Web-Based Learning Media
Authors: Nasir M , Hasyimi  , Mahdi  , Amru  
Published: June 2019

Abstract
This modeling test is equipped by web-based and multimedia system perform to save time and cost in learning TOEFL. The purpose of this research is to design and build the TOEFL system application as a web-based learning media in TOEFLlearning and test. The research specific target is the TOEFL system that can be used as an ICT learning medium online software website for the developing of TOEFL learning. The method used is quantitative method that starts from literature study, interview, observation, data analysis, model and system design, making of the application and system testing. The simulation of Web-based TOEFL modeling has been simulated using PHP and MySQL programming languages. The conclusion of this research is a web-based TOEFL simulation as a medium of online software learning in website for the development of learning TOEFL. The random question system will be worked better if the type of questions provided more on the TOEFL simulation. On the simulation, the same participants will not get the same combination of tests on different tests. This TOEFL system capable to runsign inby user-level identification process first, so that the system access is well controlled. This application can only be accessed by users who have made the sign up process.
Web-based Application of Agricultural Management Development
Authors: Salahuddin  , Husaini  , Anwar  , Zulfan  
Published: June 2019

Abstract
This paper discusses the web application of the agricultural sector, especially food crops and horticulture which is one sector that drives the wheels of regional economy and the income of the people of North Aceh, Aceh Province, Indonesia. Some agricultural products and food crops that are the leading products in North Aceh Regency are peanuts, long beans, mango, lime, nutmeg and candlenut. The North Aceh regional government does not yet have a web-based application to manage superior products in the agricultural sector. The mechanism used in designing and creating web-based applications starts from designing, application coding and application testing. After testing the web application that has been built with black box and white box testing to determine the behavior and robustness of the agricultural web application. The results showed that the accuracy of agricultural web-based application reaching of 93.4%. The application of web-based agricultural management development has been running as it should for mapping superior agricultural commodities and potential agricultural locations in the North Aceh region.
The Analysis of Data Distributions Presented in The Indonesian and English College Textbooks Based on Statistical Cognition and Meanings of Data
Authors: Habibah Ummi , Idris Khairiani , Yang Kai-Lin 
Published: June 2019

Abstract
A statistics textbook should provide an opportunity for students to acquire skills in statistical cognition which involve statistical basic knowledge, reasoning and thinking. The meaning of data, on the other hand, is crucial for presenting the cognition. This study analyzed topic of data distributions presented in the English and Indonesian college statistics textbooks. While the Indonesian version heavily emphasizes on the basic knowledge related to procedures, the English version, variously elaborates each content with basic knowledge or reasoning. Data as numerical numbers are presented for showing procedures in both versions of textbooks. More diverse meaning of data, however, was found in the English version, including data as numbers with meaningful contexts to represent problems, and as information to be evaluated or criticized using reasoning and thinking.
Deep learning for the monitoring and process control of femtosecond laser machining
Authors: Xie Yunhui , Heath Daniel J , Grant-Jacob James A , Mackay Benita S , McDonnell Michael D T , Praeger Matthew , Eason Robert W , Mills Ben 
Published: June 2019

Abstract
Whilst advances in lasers now allow the processing of practically any material, further optimisation in precision and efficiency is highly desirable, in particular via the development of real-time detection and feedback systems. Here, we demonstrate the application of neural networks for system monitoring via visual observation of the work-piece during laser processing. Specifically, we show quantification of unintended laser beam modifications, namely translation and rotation, along with real-time closed-loop feedback capable of halting laser processing immediately after machining through a ∼450 nm thick copper layer. We show that this approach can detect translations in beam position that are smaller than the pixels of the camera used for observation. We also show a method of data augmentation that can be used to significantly reduce the quantity of experimental data needed for training a neural network. Unintentional beam translations and rotations are detected concurrently, hence demonstrating the feasibility for simultaneous identification of many laser machining parameters. Neural networks are an ideal solution, as they require zero understanding of the physical properties of laser machining, and instead are trained directly from experimental data.
Association Between Circadian Hemodynamic Characteristics and Target Organ Damage in Patients With Essential Hypertension
Authors: Kusunoki Hiroshi , Iwashima Yoshio , Kawano Yuhei , Hayashi Shin-ichiro , Kishida Masatsugu , Horio Takeshi , Shinmura Ken , Yoshihara Fumiki 
Published: June 2019

Abstract

BACKGROUND
This study investigated the association between circadian hemodynamic characteristics and asymptomatic hypertensive organ damage.

METHODS
Circadian hemodynamics, including 24-hour brachial and aortic systolic blood pressure (SBP), pulse wave velocity (PWV), augmentation index (AIx@75), cardiac index, and total vascular resistance (TVR), were evaluated using an oscillometric device, Mobil-O-Graph, in 284 essential hypertensive patients (67.8 ± 16.0 years, 54% female). Hypertensive target organ damage (TOD), namely carotid wall thickening, left ventricular hypertrophy, and albuminuria, was assessed in all patients.

RESULTS
Office SBP and 24-hour brachial and aortic SBP all increased with increasing number of organs involved (all P &lt; 0.01 for trend). After multivariate logistic regression analysis, 24-hour brachial SBP (odds ratio [OR] = 1.04 for 1 mm Hg increase, P &lt; 0.001) as well as aortic SBP (OR = 1.03 for 1 mm Hg increase, P &lt; 0.05) maintained significance. Percent decrease during nighttime in brachial SBP, PWV, and TVR, but not cardiac index, showed a significant graded relationship with the number of organs involved. In a multivariate stepwise regression model, the nighttime values of brachial SBP, PWV, and TVR emerged as independent predictors of the presence of TOD.

CONCLUSION
In essential hypertension, 24-hour aortic SBP could be a marker of subclinical TOD, and further, the blunted nocturnal BP reduction in TOD patients might be mediated by disturbed circadian hemodynamic variations in aortic SBP, vascular resistance, and arterial stiffness.
Larval morphology predicts geographical dispersal range of Eastern Pacific eels
Authors: Dale Katherine E , Tinker M Timothy , Mehta Rita S 
Published: June 2019

AbstractThe geographical range of many marine species is strongly influenced by the dispersal potential of propagules such as eggs and larvae. Here, we investigate morphological diversity and the effect of body shape on geographical range of leptocephali, the unique, laterally compressed larvae of eels (order Anguilliformes). We used phylogenetically informed analyses to examine the morphological variation of larvae for 17 Eastern Pacific eel species from three adult habitats. We also investigated whether morphological traits of leptocephali could predict larval latitudinal range, hypothesizing that body shape may influence passive dispersal via currents. We found that no two species shared the same multivariate growth trajectories, with the size and scaling of pectoral fin length and snout-to-anus length being particularly variable. Larvae with longer relative predorsal and snout-to-anus lengths at median sizes exhibited wider larval geographical ranges. Body aspect ratio and maximum body length at metamorphosis, two traits we hypothesized to be important for passive transport, were not significant predictors of maximal larval range. We discovered an increase in phylogenetic signal over larval development as eels approach metamorphosis, potentially due to similar selective pressures between related species (such as juvenile habitat or adult morphology). Lastly, we conclude that larval body shape is probably influenced by adult habitat and adult morphology.
The biochemistry surrounding bovine conceptus elongation†
Authors: Simintiras Constantine A , Sánchez José M , McDonald Michael , Lonergan Patrick 
Published: June 2019

Abstract
Conceptus elongation is a fundamental developmental event coinciding with a period of significant pregnancy loss in cattle. The process has yet to be recapitulated in vitro, whereas in vivo it is directly driven by uterine secretions and indirectly influenced by systemic progesterone. To better understand the environment facilitating this critical reproductive phenomenon, we interrogated the biochemical composition of uterine luminal fluid from heifers with high vs physiological circulating progesterone on days 12–14 of the estrous cycle—the window of conceptus elongation-initiation—by high-throughput untargeted ultrahigh-performance liquid chromatography tandem mass spectroscopy. A total of 233 biochemicals were identified, clustering within 8 superpathways [amino acids (33.9%), lipids (32.2%), carbohydrates (8.6%), nucleotides (8.2%), xenobiotics (6.4%), cofactors and vitamins (5.2%), energy substrates (4.7%), and peptides (0.9%)] and spanning 66 metabolic subpathways. Lipids dominated total progesterone (39.1%) and day (57.1%) effects; however, amino acids (48.5%) and nucleotides (14.8%) accounted for most day by progesterone interactions. Corresponding pathways over-represented in response to day and progesterone include (i) methionine, cysteine, s-adenosylmethionine, and taurine (9.3%); (ii) phospholipid (7.4%); and (iii) (hypo)xanthine and inosine purine metabolism (5.6%). Moreover, under physiological conditions, the uterine lumen undergoes a metabolic shift after day 12, and progesterone supplementation increases total uterine luminal biochemical abundance at a linear rate of 0.41-fold day−1–resulting in a difference (P ≤ 0.0001) by day 14. This global metabolic analysis of uterine fluid during the initiation of conceptus elongation offers new insights into the biochemistry of maternal–embryo communication, with implications for improving ruminant fertility.