bluuebunny/crossref_metadata_2025_split huggingface dataset:
Degradation of phospate in laundry waste with biosand filter method
Authors: Sinaga M S , Astuti S W , Gultom Elisabeth 
Published: June 2020

Abstract
The most active ingredients in laundry waste such as clothes softener and detergent are ammonium chloride, linear alkyl sulfonate (LAS), sodium dodecyl benzene sulfonate, sodium carbonate, sodium sulfate, alkylbenzene sulfonate. These materials are not biodegradable This study aims to reduce the phosphate and surfactant content with the biosand filter method which uses activated carbon as adsorbents with the laundry to nutritional waste mixtures ratio of 100%: 0, 75%: 25%, and 50%: 50% (%volume) with anaerobic process. The parameters analyzed were Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), Volatile Suspended Solid (VSS), pH everyday and Phosphate and Surfactant before and after anaerobic processes. The pH for this study is set in the range of 6.9-7.5. The largest volume was at 50%: 50% (v/v) mixture of laundry waste and nutrients obtained 76.61% TSS, 63.55% VSS, 53.67% COD, 74.32 % phosphate and 53.54% surfactant. Reduction of phosphate and surfactant values is caused by the presence of a dirty layer (biofilm) in the tank so as to produce phosphate and surfactants that have met quality standards based on the Government Regulation of the Republic of Indonesia No. 82 of 2001.
Adsorption interaction model of adsorbents white sand with heavy metals cadmium (Cd2+) naturally
Authors: Haryanto B , Saragih FT , Sinaga W K , Turmuzi M , Misran E 
Published: June 2020

Abstract
This study aimed to analyze the adsorption ability of white sand in the metal ions adsorb cadmium (Cd2+) with a concentration of 70 ppm to a solution with a pH of 4.5. The white sand is used is 40 mesh. This research was conducted by batch adsorption operation naturally and adsorption kinetics modeling. Kinetics of adsorption reached equilibrium at time t = 120 minutes with the percentage concentration of adsorbed Cd2+ 30.7%. In the adsorption kinetics modeling correlation coefficient is almost the same between the equations of first order and second order in the amount of 0.97 and 0.99. The result indicated that the type of interaction Cd2+ ions on the surface of white sands occur in chemistry and physics. The adsorption kinetics of diffusion modeling of internal and external diffusion of the correlation coefficient has 0.95 and 0.85. From this data it can be seen that in this study is modeling kinetic internal diffusion trend that shows adsorbent particles are inter sand surface area that experienced internal inter-particle pore diffusion.
Properties of unsaturated polyester composite filled with cellulose from peanut shell (Arachis hypogea I.): the effect of filler content and compatibilizer addition
Authors: Nasution H , Kosasih K , Maulida  , Al Fath M T 
Published: June 2020

Abstract
Unsaturated polyester (UPR) composite containing the powder of peanut shell fiber filler is a panel product made by compacting the particles of peanut shell powder and binding them with UPR. The purpose of this research is to investigate the effect of peanut shell fiber powder cellulose filler composition and addition of compatibilizer on the tensile properties, energy impact and water absorption of UPR composites. The composites were made of UPR as matrix and mixed with peanut shell powder as filler, with methyl ethyl ketone peroxide catalyst, and molded by using compression molding method. The result of the physical properties test supported by FTIR characterization of the composite showed that the filler was dispersed into the matrix with the formation of a new wave from 3463 to 3495 cm-1. The best of tensile and impact properties were found on 5% filler and 4% of compatibilizer composition with the tensile strength of 26.04 MPa and an energy impact of 99.82 MPa. The results obtained have been supported by Scanning Electron Microscopy (SEM) analysis that there was resistance from the composite when the impact was applied. The water absorption of composite tended to rise with the increasing amount of filler.
Effect of preheat and post heat on mechanical properties of 6061 aluminium tungsten inert gas welded joints
Authors: Hamsi A , Sitorus T B , Sinaga R K 
Published: June 2020

Abstract
Tungsten inert gas (TIG) welded joints of 6061 aluminium are often used in the fuel tanks of large launch vehicles, because of the massive loads these vehicles carry, dealing with weld reinforcement on TIG joints represents an important issue in their preheat and post heat on mechanical properties. Experimental and calculation methods were used to investigate the effect of weld preheat and post heat on the mechanical properties of these joints. The purpose of this study was to determine the effect of preheat and post heat on mechanical properties of 6061 aluminium. The experimental result indicated that mechanical properties of Al 6061 of the welding changed. The hardness of weld metal increase in temperature 130°C = 68,72 BHN, in 160°C = 70,51 BHN, and in 190°C = 76,26 BHN. Tensile strength also increase in temperature 130°C = 158,57 N/mm2, in 160°C = 169,85 N/mm2, in 190°C = 174,50 N/mm2.
Comparison of weight loss in natural rubber latex film (rubber dam) filled nanocrystal cellulose and synthetic dyes with soil burial methods
Authors: Harahap Hamidah , Wangi Yoeselyn , Chandra Toni , Halimatuddahliana  
Published: June 2020

Abstract
Biodegradation of natural rubber latex products filled with nanocrystal cellulose from peanut shell is carried out by soil burial methods with and without using fertilizer. Testing is done by calculating the loss of sample weight for 5 weeks with observation every 1 week. Samples were tested the morphology using Scanning Electron Microscope (SEM) and Fourier Transform Infra Red (FTIR). Natural rubber latex film samples showed that the loading of nanocrystal cellulose fillers from peanut shells was biodegradable faster in soil burial method with addition of fertilizer in soil compared to no addition of fertilizer.
Physical and mechanical properties of natural rubber latex film (Rubber Dam) products with filler nanocrystal cellulose from peanut shell (Arachis hypogea L.) and synthetic dyes
Authors: Chandra Toni , Harahap Hamidah , Wangi Yoeselyn , Halimatuddahliana  
Published: June 2020

Abstract
Rubber dam is considered as an ideal device for tooth isolation. Rubber dam is one of example product from natural rubber latex. Peanut shell is one of the industrial waste containing 35,7% of cellulose. Nanocrystal cellulose from peanut shell can be an alternative waste utilization and have potential as filler in natural rubber latex films. Studies about effect of loading nanocrystal crystal as filler on natural rubber latex films with polyvinyl pyrrolidone (PVP) and using synthetic dyes have been carried out on crosslink density and mechanical properties such as tensile strength, elongation at break and tensile modulus. The process begins with pre-vulcanization of natural rubber latex at temperature 70°C with 0, 2, 4, 6, 8 gram of filler loading and followed by vulcanization at 120°C for 10 minutes. The results obtained with loading nanocrystal crystal filler using synthetic dyes for physical properties, crosslink density, will increase with the increase of filler loading. For mechanical properties, tensile strength and tensile modulus will increase with greater filler loading, while elongation at break will decrease. The best results are obtained for mechanical properties of natural rubber latex film products using synthetic dye on 6 gram nanocrystal cellulose of filler loading.
The analysis of tensile strength and elasticity in slag concrete with curing variations at 90 days age
Authors: Karolina R , Handana M A P , Inanda R , Wiranti A D 
Published: June 2020

Abstract
Cement is a concrete constituent material that has a great influence on concrete quality, both normal and high-quality concrete. High quality concrete in SNI 03-6468-2000 is defined as concrete which has compressive strength characteristics above 41.4 MPa. During the process, cement produces gas emissions obtained from combustion, calcination of limestone, and the use of electrical energy. The purpose of using cement in the preparation of concrete itself is as a binder between aggregates. Nowadays, commonly used cement (OPC cement) can be replaced with slag cement. Slag cement is the result of the addition of Granulated Blast Furnace Slag into the final grinding of cement which is a waste product from the steel ore smelting process. This research is comparing the magnitude of the tensile strength and the modulus of elasticity of the samples with 100% OPC cement and those with 100% slag cement. The samples used were cylinders with 15 cm diameter and 30 cm height. The tests were carried out when the concrete reaches 90 days age. The curing of the samples was carried out with four variations which is by submerging those in tap water, Kuala Tanjung sea water, Sulphuric Acid water, and compound curing. The results of this test were obtained if the slag cement-used concrete is able to have a tensile strength that is almost the same as OPC cement-used concrete which is 4.341 MPa for normal concrete and 4.293 MPa for slag concrete and its modulus of elasticity of 46103.67 MPa for normal concrete and 46892.82 MPa for slag concrete.
Economic analysis of port development project (case study: Belawan Port Medan)
Authors: Nurul Huda Listiani , Sulastri Ratih 
Published: June 2020

Abstract
Belawan Port is one of the most important ports on the island of Sumatra. Port conditions are currently only able to load ships with a maximum draft of 8.9 m for normal water level conditions. This condition greatly limits the productivity especially for large ships. Therefore, the access channel deepening project is proposed to improved loading and unloading activities. This study was conducted to assess the benefits received from the project. The study was conducted with the parameters EIRR (Economic Internal Rate of Return), NPV (Net Present Value), and PI (Provitability Index). Furthermore, it also conducted a study to make the Port of Belawan port become sustainable. After analysis, the value of EIRR is 23.53% and NPV is 622,586,691 USD, and PI is 3.99. These results showed that the project has the proper parameters even when the sensitivity analysis I done with the benefit reduce to 70% and cost at fixed. But to get a sustainable port predicate still needed some adjustments, especially in terms of preserving the natural environment in which the parameter is still below the standard. Necessary measures such as the provision of a special budget for green port adjustment programs and policies and the provision of facilities to support the program.
Evaluation the effect of supply chain management on firm performance in passion fruit syrup company
Authors: Febrina Kodrat Kimberly , Sinulingga Sukaria , Napitupulu Humala , Ampuh Hadiguna Rika 
Published: June 2020

Abstract
In fact, supply chain management can not only be applied by large enterprises but also by Small and Medium Enterprises. One of them is Small and Medium Enterprise of Passion fruit. Passion fruit (passifloraceae) is one of the strategic commodities because of its usefulness as raw material of passion fruit syrup as an agroindustry product that has rich nutritional value of vitamin C which is beneficial to human health. This research has five elements of supply chainnamely : farmers, suppliers, extract agroindustry, passion fruit syrup agroindustry, and retailers.The objective of this study is to analyze whether there is a significant influence between Supply Chain Management on firm performance. This type of research was a causal research. Data collection used questionnaire. The result of multiple linear regression analysis, it showed that the variable of process integration has the biggest influence to variable of enterprise SCM performance (dependent) with coefficient value equal to (0,289), then variable of satisfaction with value (0,058), variable of trust (0,286), communication variable (0,184), dependency variable (0,021) and having the least was the variable of influence and commitment (0,080). This means that the five independent variables have a positive and significant influence on the dependent variable.
Micro, Small and Medium Enterprise strategy to improve competitiveness in the era of the ASEAN economic community (AEC)
Authors: Fernanda Putri Widya , Sinulingga Sukaria , Hidayati Juliza 
Published: June 2020

Abstract
The Asean Economic Community or AEC in Indonesia has been in effect since 2015. The establishment of the MEA itself is carried out in order to increase ASEAN’s competitiveness and be able to compete with China and India to attract foreign investment. This foreign investment is needed to increase employment and improve welfare. MEA, the goal to be achieved is the free flow of goods, services, and trained labor, and a freer flow of investment. With the enactment of the AEC in Indonesia in 2015 will provide some challenges both at home and competition with fellow ASEAN countries and other countries outside ASEAN such as China and India. This competition will have an impact on competitive prices as well, not only the superior commodities / products / services of large industries (UB), but also the Micro, Small and Medium Enterprises (MSME) sector.
The possibility of smartphone camera to determine iron(III) in solution
Authors: Rosyida N , Dinira L , Wulandari E R N 
Published: June 2020

Abstract
Determination of iron in solution is usually done by using instruments, such as Atomic Absorption Spectrophotometer (AAS) and UV-Visible Spectrophotometer. However, the availability and the use of these instruments in Indonesia is limited due to the expensive price. Nowadays everyone has smartphone with advanced camera features. This study focuses on the determination of iron (III) using a non-instrument method, namely digital image colorimetry. This method is using smartphone camera to capture the digital image of sample. Smartphone cameras used on this study are based on Android operating system with the specification of 16-megapixel and OS operating system with the specification of 12-megapixel. Digital images that has been captured by smartphone camera are processed using MATLAB to determine the RGB intensity. The image processing results then compared with the results from UV-Visible spectrophotometer. The result shows the linearity of the RGB color calibration curve from the smartphone camera is on a part with the calibration curve that generated by the UV-Visible spectrophotometer. This indicates that smartphone camera has a possibility to determine iron (III) in solution by using digital image colorimetry.
Balanced scorecard in the integration of corporate strategic planning and performance: a literature review
Authors: Alqili Laury Hanni , Matondang Nazzaruddin , Tryana Sembiring Meilita 
Published: June 2020

Abstract
The purpose of this paper is to review the model literature Balanced Scorecard (BSC) from 2008 to 2017 in order to provide reference guidance to researchers, particularly with regard to the context and focus of previous research, and various methodology approach to the assessment of performance measurements from the perspective of Balanced Scorecard. The primary objective of this study is to analyze the application of BSC in various specific areas, as well as investigating its extension. The methodology used in this study is a literature review of published articles. The searching of the literature was conducted based on research objectivity from an online search of relevant literature. The findings from the review are summarized. Then, the authors have an analysis of the identified articles.
Design of E-office system in vocational school Diponegoro University using code igniter framework
Authors: Subari A , Manan S , Ariyanto E 
Published: June 2020

Abstract
E-Office is an administrative and centralized component of the organization where data, information and communication are stored and disseminated through several forms of telecommunications. The main advantage of the E-Office system is that it can reduce paper usage. The other advantages are centralized data store, quickly data access, accurately and real time using the internet network and can make reports quickly based on existing data. With all the advantages of E-Office system, Vocational School of Diponegoro University is committed to using its services, especially in the process of managing correspondence documents. It is necessary to design and create an application based on E-Office that is used at Vocational School of Diponegoro University. This research is intended to build an application or information system based on E-Office system to handle the management of correspondence documents at the Vocational School of Diponegoro University by utilizing web-based applications. Information system design uses MVC concept on code igniter framework. With E-Office system, management of correspondence documents can be done more quickly and can be done anywhere. The impact is that service time for stakeholders is becoming faster.
Dashboard information system development as visualization of transaction reports in the application BackInd (backpacker reservation system)
Authors: Lubis Muharman , Dennis Filhan , Andreswari Rachmadita , Ridho Lubis Arif 
Published: June 2020

Abstract
The accuracy and clarity of information becomes primary source for decision making process to bring effective and efficient of technology utilization. For this purpose, the ‘BackInd’ has been developed as reservation system to help travellers obtain complete information regarding the tourist attractions and any relevant information. Therefore, there are several problems that occur in term of presenting information, such as the use of complex tables as a means of detail information about business conditions, information overload in single page that become deterrent in term of identification of relevant data and unintuitive data presentation that bring exhaustive understanding. Thus, the implementation of dashboard can visualize the key performance and metric in real-time to support the executive gain valuable insight lead to quick and accurate decision making. The results of this study related to the process and context analysis by visualizing the data group into various sections such as transactions, finances, testimonials, visits and business performance to bring resourceful and usable information.
Effect of TiO2 additive volume fraction in lubricant oil on the performance of hydrodynamic journal bearing
Authors: Singh Anurag , Verma Neeraj , Chaurasia Aman , Kumar Alok 
Published: June 2020

Abstract
Hydrodynamic journal bearings are widely used in rotating machines where high loading condition prevails. In this work, effect of different volume fractions of TiO2 (Titanium dioxide) additive in commercially available SAE30 lubricant oil on the performance of hydrodynamic journal bearing is analysed experimentally. Hydrodynamic journal bearing test rig is used to perform the experiment. The experiment is carried out by taking different volume fractions of TiO2 additive (0.075%, 0.1% and 0.15%) in SAE30 lubricant base oil and their effect on journal bearing characteristics like coefficient of friction, pressure distribution, temperature rise, eccentricity ratio, attitude angle, minimum film thickness and displacement is analysed. Paraffin oil is used to uniformly distribute the TiO2 in the base oil and to resist sedimentation.
The study shows that the addition of TiO2 additive in the base SAE30 lubricant oil is capable of significantly reducing the values of friction coefficient and maximum temperature rise. It has been found that the addition of TiO2 additive improves the performance of the hydrodynamic journal bearing. Results reveals that the additive performs better at higher loading conditions.
Synthesis and characterization of CZTS thin films from compound target deposited by RF sputtering method
Authors: Abdullahi S , Momoh M , Moreh AU , Bayawa AM , Saidu A 
Published: June 2020

AbstractA potential way to improve the quality of Copper-Zinc-Tin-Sulfide (Cu2ZnSnS4(CZTS) absorber thin film by one step process of Radio Frequency (rf) sputtering using a single compound target is proposed for thin film solar cells. Structural and Optical characterizations were carried out using X-ray Diffractometer, Raman spectrophotometer and UV-VIS spectrophotometer. The X-ray diffraction analysis showedhklplanes of (002), (110), (112) and (212). Raman results confirmed the existence of secondary phases of SnS, Cu2-xS and CTS. The optical absorption coefficient of the thin film was found to be greater than 104cm−1indicating a direct band gap nature of the samples. The optical band energy was calculated and found to be in the range of 1.51eV to 2.4 eV. The band gap energy obtained is more appropriate for photovoltaic applications.
Antimicrobial and antioxidant activities of algal-mediated silver and gold nanoparticles
Authors: Omomowo I O , Adenigba V O , Ogunsona S B , Adeyinka G C , Oluyide O O , Adedayo A A , Fatukasi B A 
Published: June 2020

Abstract
This study focused on the synthesis and application of nanoparticles using Neodesmus pupukensis (MG257914). Cell free extracts of the microalga was employed to synthesize both silver (AgNPs) and gold nanoparticles (AuNPs). The nanoparticles were characterized using UV-visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), and Scanning electron microscopy (SEM). The nanoparticles were screened for their antimicrobial potential and free radical scavenging activity against stable free radical (2,2-diphenyl-1-picrylhydrazyl). The UV absorption spectra showed absorbance peaks of 430 nm and 530 nm for AgNPs and AuNPs respectively. The FTIR spectra at 3283, 2102.87, 1636.02 for AgNPs and 3264.86, 2104.49, 1636.62, 1232.39, 1028.97 cm−1 for AuNPs confirms the participation of proteins in the capping and stabilization of the nanoparticles. The zone of inhibition indicating the activity of the NP-AgNPs were: Pseudomonas sp (43 mm); Escherichia coli (24.5 mm); Klebsiella pneumoniae (27 mm), Serratia marcescens (39 mm) while AuNPs showed activity to only Pseudomonas sp (27.5 mm) and Serratia marcescens (28.5 mm). The antifungal potency of NP-AgNPs was confirmed with mycelial inhibition of 80.6, 57.1, 79.4, 65.4 and 69.8% against Aspergillus niger, A. fumigatus, A. flavus, Fusarium solani and Candida albicans respectively, while NP-AuNPs had 79.4, 44.3, 75.4, 54.9 and 66.4% against A. niger, A. fumigatus, A. flavus, F. solani and C. albicans respectively. Appreciable free radical scavenging properties was obtained with NP-AuNPs (68.9%) and NP-AgNPs (41.21%). The nanoparticles of Neodesmus pupukensis showed appreciable potential as antimicrobial and antioxidant agents and could be explored for various applications in biotechnology.
Antioxidant and antimicrobial activities of nanosilver-mycomeat composite produced through solid state fermentation of tigernut waste and cassava pulp by Pleurotus pulmonarius
Authors: Bamigboye C O , Amao J A , Fadiora I A , Adegboye J D , Akinola O E , Alarape A A , Oyeleke O R , Adebayo E A 
Published: June 2020

AbstractBacterial deterioration is one of the most critical subjects in the production, processing, transport, and storing of food. The search for novel materials for the synthesis of nanoparticles is unending and this is likely to continue in the upcoming years. In this study, mycomeat samples were produced using cassava pulp (C) and tiger nut aggregate waste (T). The mycomeat extracts were used to produce nanosilver-mycomeat by catalytic conversion of Ag+to Ag0. The antioxidant and antimicrobial activities of the nanosilver-mycomeat composites were determined using established methods. The nanosilver-mycomeat composites of both C and T showed increased antioxidant and antimicrobial activities compared to the ordinary mycomeat extract. This can find applications in the packaging of food, thereby preventing food samples from deterioration.