bluuebunny/crossref_metadata_2025_split huggingface dataset:
The accident risk of motorcyclist perception and driving behaviour: a case study
Authors: Nurul Huda Listiani , Puspa Sari Lubis Indah 
Published: June 2020

Abstract
A traffic accident is an incident that is unexpected and involves a vehicle with or other road users resulting in human casualties or property losses. Accidents are caused by several factors including environmental factors, vehicle factors, and driver factors. Traffic police noted that in 2017 there were 91,371 traffic accidents caused by driver factors. Bad driving behaviour causes driving distraction which is an important risk factor in traffic accidents. This happens because the driver perceives a risk that is smaller than the actual risk. The purpose of this study was to see the existence of a significant relationship between risk perception and driving behaviour towards the risk of motorcycle accidents(H0). Case study took place in Industrial Engineering Department, Faculty of Engineering, University of Sumatera Utara. Data were collected using research instruments in the form of driving behaviour questionnaires which consists of two indicators namely obedience and pride, risk perception questionnaires which consists of two indicators namely worry and social pressure, and traffic accident risk questionnaires which consists of three indicators namely declaration rate, respond to accident, and braking distance. Then a Structural Equation Model (SEM) was made. The results of the Structural Equation Model (SEM) show a significant relationship between risk perception and driving behaviour with a t-value of 1.98. This indicates that worry and social pressures have a significant direct effect on drivers’ behaviour.
Extraction of sambung nyawa leaves (Gynura Procumbens [Lour]. Merr) using methanol as solvent
Authors: Suriani Sinaga Mersi , Defriska Siagian Putri , Meidinah Shintia 
Published: June 2020

Abstract
Sambung nyawa leaves (Gynura Procumbens [Lour]. Merr) is used as traditional medicine. Sambung nyawa leaves contain flavonnoid compound which can be used as natural antioxidant. This research was done to analyze the effect of the additon of Sambung Nyawa leaves extract as antioxidant and its ability to keep the quaity of coconut oil. The variables used in this research were the ratio of raw material to solvent (m/v) and extraction temperature. First, extraction was done to extract flavonoid compound from Sambung Nyawa leaves. The extract of Sambung Nyawa leaves with the highest flavonoid compound was mixed with coconut oil for 3 days, 6 days, 9 days, 12 days and 15 days. Total flavonoid level from Sambung Nyawa leaves was analyzed by UV-Vis Spectrophotometry. Acid number, iodine number and peroxide number of the coconut oil were also analyzed in this research. The highest total flavonoid level obtained was 1.32% at 55°C by using 1:10 (m/v) of raw material to solvent ratio. The lowest acid number, the highest iodine number and the lowest peroxide number in coconut oil with Sambung Nyawa leaves extract after it was kept for 3 days were 0.45%, 7.90g I2/100g and 4.40 mg O2/100g respectively.
Application of ranked positional weights method in springbed production line balancing
Authors: Siregar Ikhsan 
Published: June 2020

Abstract
In the current era of globalization, business competition demands industries in manufacturing to improve their business strategies are increasingly. The company that produces spring beds of various sizes has experienced rapid development. Spring bed 180 cm x 200 cm size has the longest process and research on the springbed production line is 180 cm x 200 cm. The company has 9 work stations with 19 work elements with time variation of work elements which are 50 seconds to 2737 seconds. The problem experienced by the company is the bottleneck at the assembly station because it has the longest cycle time of 2737 seconds. One method used in assembly line balancing is the RPW method (Ranked Positional Weights). The RPW method is an approach to solving problems in line balance and finding solutions quickly by the number of workstations determination at a minimum by giving weight to each work elements that has been placed on all work elements. Using the RPW method, obtained line efficiency, balance delay and smoothing index were 86.09%, 13.91% and 1418.45 with the number of work stations is 8.
Design of work facilities using quality function deployment (QFD) and macro ergonomic analysis design (MEAD)
Authors: Tambunan M M , Napitupulu H L , Rizkya I , Syahputri K 
Published: June 2020

Abstract
XYZ is a company engaged in the manufacturing of doors. XYZ process consists of 7 work stations, such as sorting of raw material, the unification of the core material, reaping, laminating, manufacture of components, finishing, and packing. Among 7 work stations, only 1 work station to work while standing still during work (8 hours) and do not have other work that supports the position that the work station finishing work. The purpose of this study is to make improvements to the facilities at the finishing work desk. Facility design work is done by using quality methods to obtain technical characteristics in accordance with the desire of works. Furthermore, the results of the design tool socialized to all component companies use macro ergonomic analysis and design (MEAD). From the result of the design was found that the workbench is design to have the specification table legs fixed, material frame of iron, base material of foam, base material of leather, color frame brown, place mats of blue, the durability of the table at least 3 years, and additional function where the laying equipment. Result are discussed with the company designing and disseminated to the component companies
Simulation process unit bleaching in cooking oil plant using super pro designer version 10.0
Authors: Irvan  , Suharmanto A , Sidabutar R , Ashari M 
Published: June 2020

Abstract
The bleaching process is one of the processes in the manufacture of cooking oil that serves to absorb the gum, moisture content and color in crude palm oil. Role of color in the marketing of cooking oil is very important, because, in general consumers tend to use the color parameters as the quality of cooking oil. The use of programs to facilitate the design of a process such as Super Pro Designer, Aspen, and Hysys is a way to increase the profitability of an industry. This study aims to provide information that Super Pro Designer applications can simulate the bleaching process contained in the cooking oil plant. Method used was simulated data obtained from the plant using Super Pro Designer Version 10.0. The result showed that at feed flow rate of 86,000 kg/hour the temperature of 100 °C was obtained as output of plate heat exchanger.
Computer simulation of horse shoes made of polymeric composite subjected to external loading
Authors: Syam Bustami , Muttaqin Maraghi , Siregar REK , Rozy Fakhrur 
Published: June 2020

Abstract
A horse shoe is designed to protect a horse’s hoof from wear. Like the human shoes, the horse shoes should also meet the ergonomic design, i.e. strong enough to withstand external loadings, comfort, and safe. Conventional horseshoes made of iron, for example, have good mechanical properties, but they are not comfort enough for horses due to its higher weight to size ratio. The internal stresses due to the external loading of the shoes to the soil surface, rocks, asphalt or hard surface will transfer the force of the horse’s foot pounding against the horse’s foot, so that it can hurt the horse’s foot if used for a long time. Therefore, a new research on polymeric foam alternative materials is the main concern to reduce existing problems. The purpose of this study was to conduct a static loading simulation of horse shoes made of polymeric foam reinforced with glass fiber using ANSYS software. In the simulation specimens are modelled with SolidWork. The aims are to determine the stress distribution of to two horse shoes models. It was found that the stresses on z-direction for both commercial and polymeric composite horse shoes material were not significantly difference in values. Stress in z-direction constitutes the bending stresses due to external loadings. The stress contours on both modes are also similar. The stress concentration occurs around the vicinity of the shoe connectors. The maximum normal stresses in z-direction at those locations for steel and polymeric composite are 7.819 MPa and 7.850 MPa, respectively. Comparing those stresses with the static tensile strength of both materials we may conclude that both horseshoe structures are acceptable to be used. However, in terms of the applicability the one made of polymeric composite are more easily to be used.
Discrete system simulation application on determining the optimal amount of weekly production
Authors: Napitupulu Humala L 
Published: June 2020

Abstract
PT. MNO produces egg trays to serve requests from 4 Distribution Centers (DC) in 4 regions, namely DC1, DC2, DC3, and DC4. Delivery of products to meet all DC requests is done once a week. Sometimes, supply shortages occur when the total weekly production and initial stock is lower than the total demand. This shortage of supply results in loss of opportunity. While in other weeks there is excess inventory which causes storage costs. Shortage or excess stock is related to the absence of production planning and determination of weekly production plans. Therefore, the optimal amount of weekly production needs to be determined using a system simulation. Simulation models are designed and translated into formulas in Microsoft Excel worksheets. While data on the number of requests is generated by using the weekly demand distribution pattern as a reference. Discrete system simulations are run by experimenting on nine levels of total weekly production. The output obtained includes the number of requests that can be fulfilled, the weekly ending stock, the number of shortage, the amount of excess stock, and the total profit. Simulation results obtained can indicate the optimal level of production.
Performance improvement strategies to increase call center service level: a literature review
Authors: Sihol Marito Purba Johana , Hidayati Juliza 
Published: June 2020

Abstract
Call centers are an increasingly important part of today’s business world, employing millions of agents across the globe and serving as a primary customer-facing channel for firms in many different industries. Call centers have been a fertile area for operations management researchers in several domains, including forecasting, capacity planning, queueing, and personnel scheduling. Also, as telecommunications and information technology have advanced over the past several years, the operational challenges faced by call center managers have become more complicated. Issues associated with human resources management, sales, and marketing have also become increasingly relevant to call center operations and associated academic research. In this paper, we provide a survey of the recent literature on call center operations management. Along with traditional research areas, we pay special attention to new management challenges that have been caused by emerging technologies, to behavioral issues associated with both call center agents and customers, and to the interface between call center operations and sales and marketing. We identify a handful of broad themes for future investigation while also pointing out several very specific research opportunities.
Effect of surface treatment on tribological characteristic of ferrite nanoparticles epoxy composites
Authors: Singh Ashtosh Kumar , Zaidi M. G. H. , Saxena Rakesh , Suman Rajeev , Maheshwari Peeyush , Gangwar H. P , Rawat K. S. , Verma A. 
Published: June 2020

Abstract
In this investigation, surface treatment of ferrite nanoparticles were efficiently prepared by using amino propyl silane (APS). XRD which is a spectral analysis technique used for investigate the morphology and chemical structure of treated and normal ferrite nanoparticles. Ferrite nanoparticles epoxy composites were prepared by Modified ferrite nanoparticles (MFNs) with varying weight percentage and ferrite nanoparticles (FNs). XRD shown that MFNs was effectively modified with highly crystalline structure and silane surface treatment decreased the average particle size of FNs to ∼ 16.48 nm. Surface treatment of FNs enhanced the homogeneous dispersion of ferrite in epoxy resin and improved interfacial adhesiveness between MFNs and epoxy. Tribological property of Modified ferrite nanoparticles epoxy composite (MFNEs) compare to cured epoxy and normal ferrite nanoparticles epoxy composites (FNEs) has been enhanced due to surface treatment.
Evaluation of impact and hardness properties of Al 6063-AgNPs composites produced by stir cast technique
Authors: Mudashiru L , Adeodu A , Awodoyin A , Bello A , Oloyede O , Aiyedun P 
Published: June 2020

Abstract
The effect of silver nanoparticles (AgNPs) on the mechanical and microstructural properties of aluminium 6063 alloy was investigated. Aluminium 6063 matrix was homogenously mixed with AgNPs impregnated with calcium carbonate at 2, 4 and 6% weight fractions. The mixture was used to produce refined samples through stir casting method. Measurement of impact strength and hardness property of the produced samples at ambient temperature was done by using Charpy impact and Brinell hardness testing machine in accordance with ASTM E23 and ASTM E384 respectively. The impact energy values (234-247 J) of all the samples with AgNPs/CaCO3 reinforcements were higher than the as-cast Al alloy (228 J) while the sample with 6% AgNp has the highest energy impact (247 J). Similarly, the hardness values (56.49-183.70 BHN) of all the samples with AgNPs/CaCO3 reinforcements were higher than the as-cast Al alloy (38.05 BHN) while the sample with 6% AgNPs has the highest (183.70 BHN). The magnitude of impact and hardness increased evidently with increase in percentage weight fraction of the AgNPs. The fracture images of the impact test samples revealed that the surface of AgNPs (CaCO3)-Al6063 composites were with dimples and there was a micro-void formation in CaCO3-Al6063 composite. The use of stir-casting technique influenced the homogeneity and microstructure of the AgNPs composites positively. The Al 6063-Ag nanocomposites possess better qualities in terms of impact energy and hardness, likewise can replace conventional aluminium alloy based on its performance.
Spectroscopic, microscopic and electrical characterization of nanoscopic polyindole DNA-templated nanomaterials
Authors: Yahaya MI 
Published: June 2020

AbstractThere has been an increasing demand for in expensive, accurate, movable and reliable nanomaterials for nanoelectronics devices and other applications. Deoxyribonucleic acid has robust nature, therefore it self-fabrication with indole can produce highly organised functional nanostructures that are of great interest for chemical industry applications. This research work is concerned with the synthesis, spectroscopic, microscopic and electrical characterisation of hybrid polyindole (Pln) DNA templated nanowires. Polyindole (PIn) has been templated on λ-DNA via oxidative polymerisation of indole using FeCl3to produce conductive PIn/DNA nanowires. The formation of PIn/DNA nanowires were verified by FTIR, UV-vis and XPS spectroscopy techniques. AFM, SEM and TEM techniques were used to characterise the nanowires dimensions. AFM studies revealed an average height of 1.60 nm for free DNA and the Pln/DNA nanowires have diameters in the range 2−15 nm with the dominance of 3-4 nm mean diameter range. The electrical properties of Pln/DNA nanowires as drop-cast films were investigated by two-terminal current voltage (I-V) measurements on a probe station. The nanowires were drop-cast (5 μL of as-prepared dispersion) onto platinum microband electrodes. The conductance of these films at 20 °C was of the order of 10-100 μS. In addition, the conductance of PIn/DNA nanowires exhibits Arrhenius behaviour (Ea = 0.80 + 0.06 eV) as a function of temperature. The above results have revealed the potentials of the Pln/DNA nanowire in nanoelectronics applications.
Optical studies of titanium dioxide/silver/gold (TiO2/Ag/Au) nanocomposites as photo anode in dye sensitized solar cells
Authors: Ogundeji ST , Awodele MK , Oyeshola HO , Adedokun O 
Published: June 2020

Abstract
In dye-sensitized solar cells (DSSCs), the performances of the photo anodes depend on the bandgap of semiconducting nanomaterials. Titanium dioxide (TiO2) is usually used in preparation of photo anode but it absorbs only the ultraviolet light, owing to its large bandgap of about 3.2 eV, and another drawback is that TiO2 has low electron mobility. In this study, optical studies of (TiO2/Ag/Au) nanocomposites as photo anode were carried out in order to test the possibility of improving the efficiency of the DSSCs. Dye molecule was extracted from the leave of sensitive plant (Mimosa pudica) using ethanol as solvent. TiO2/Ag/Au were deposited on a glass substrate using doctor blade method; the deposited thin films were annealed in a furnace at 450 °C for 1 h after which the annealed thin films were dye loaded for 12 h with Mimosa pudica extract. The dye loaded thin films of TiO2/Ag/Au were then characterized with a UV-vis spectroscopy to get the transmittance. The absorbance and the optical band gap were calculated. The optical absorption spectra and optical bandgap spectra of TiO2/Ag/Au thin films were examined. The maximum absorption was observed within the range of the visible region when the position of TiO2/Ag/Au is of volume ratio 1:1:0.8 and optical bandgap of 3.75eV. Anticipatedly, the performance characterization with further review on TiO2 with Ag/Au nanocomposites using M. pudica extract, as a sensitizer will enhance the development of an authentic and competitive dye sensitized solar cell.
Evaluation of microalgal-based nanoparticles in the adsorption of heavy metals from wastewater
Authors: Adenigba VO , Omomowo IO , Oloke JK , Fatukasi BA , Odeniyi MA , Adedayo AA 
Published: June 2020

Abstract
Bioremediation remains an eco-friendly and inexpensive method employed in getting rid of the toxic compounds like heavy metals present in wastewater. Different microorganisms are being used in either removing or reducing the concentration of heavy metals in wastewater but microalgae have a high affinity for heavy metals. In this study, nanoparticles from microalgae were evaluated for the potential to absorb lead and zinc from pharmaceutical effluent. Silver (AgNPs) and gold nanoparticles (AgNPs) were synthesized from both Nannochloropsis sp (NN) and Chlorella vulgaris (CV). The nanoparticles were introduced into a pharmaceutical effluent and the mixture was allowed to interact for 48 h after which the concentration of zinc and lead was determined using atomic absorption spectrophotometer. The AgNPs of Nannochloropsis sp (NN-AgNPs) and C. vulgaris (CV-AgNPs) had percentage reduction of 70.35 % and 74.62% respectively for zinc. Also gold nanoparticles of Nannochloropsis sp (NN-AuNPs) and C. vulgaris (CV-AuNPs) had percentage reduction of 60.32% and 66.83% respectively for zinc. The concentration of lead was reduced by CV-AgNPs (66.10 %), NN-AgNPs (68.86%), CV-AuNPs (57.41%), and NN-AuNPs (66.53 %). This study has established algal based nanoparticles as adsorbent with affinity for heavy metals and can be adopted for bioremediation of wastewater.
Ecofriendly production of silver nanoparticles from the seeds of Carica papaya and its larvicidal and antibacterial efficacy against some selected bacterial pathogens
Authors: Aina AD , Owolo O , Adeoye-Isijola M , Olukanni O D , Lateef A , Egbe T , Aina FO , Asafa TB , Abbas SH 
Published: June 2020

Abstract

Carica papaya seed extract (CPE) was used in the synthesis of silver nanoparticles (AgNPs) in this study. For the characterization of biosynthesized particles, UV-vis spectroscopy, FTIR, FESEM and EDX were used. Antimicrobial and larvicidal efficacies of the synthesized AgNPs were assessed in the fight against certain pathogens and the Aedes aegypti 4th instar larvae. The absorption spectrum of AgNPs peaked at 433 nm with a broad peak of 3000 to 3800 cm−1 for different functional groups as presented in the FTIR analysis. A FESEM evaluation revealed a number of spherical particle structures with an average of 20-69 nm. With zones of inhibition between 10-24 mm, the AgNPs synthesized inhibited selected microorganisms. After 12 h of exposure, the nanoparticles had LC50 and LC90 lethal concentration on the Aedes aegypti larva at 14.56 and 33.89 μg/ml respectively. This study demonstrates possibility of using Carica papaya seeds in AgNPs synthesis.
Green synthesized novel silver nanoparticles and their application as anticoagulant and thrombolytic agents: A perspective
Authors: Azeez M A , Durodola F A , Lateef A , Yekeen T A , Adubi A O , Oladipo I C. , Adebayo E A , Badmus J A , Abawulem A O 
Published: June 2020

Abstract
Effective management of haemostatic disorders in patients is pertinent in order to prevent complications attributable to incidences of thrombosis in atherosclerotic arteries to the heart, brain, limbs, stagnant blood in veins and heart chambers. The use of existing chemical agents are not without a number of challenges, varying from potential for unknown long-term adverse effect through lack of antidote for most agents, balance between cost and efficacy among others. However, advent of biogenic silver nanoparticles with anticoagulant and thrombolytic potentials has opened up a window of opportunity to address most of the shortcomings of the chemical synthesized anticoagulants. This review examined green synthesized novel silver nanoparticles, their characterization and possible application as anticoagulant and thrombolytic agents in the evolving area of nanomedicine.
Based on Bionic Optimization Design and Strength Analysis of The Tie Rod of Aircraft Landing Gear
Authors: Tang M T , Wang Q , He G Y , Liu R P 
Published: June 2020

Abstract
Based on the three-dimensional model of the cross-type tie rod in the landing gear of an aircraft, the mechanical analysis and solution are carried out, and the stress nephogram as well as the maximum position are obtained. Based on the analysis of bamboo microstructure, two kinds of imitated bamboo tie rod has been designed, one is the imitated bamboo without knots, the other is added knots. The three-dimensional modeling is carried out. The static analysis of finite element is carried out under the same working condition, and the stress nephogram and the position of the maximum value are obtained. The results of two kinds of simulated bamboo tie rod and cross-type tie rod are compared and analyzed. The results show that the mechanical properties of the whole simulated bamboo tie rod are superior to the cross-type tie rod.
Research on Anti-Vibration based on Screw Fixation and Friction-Assisted Fixation Method for the Space Payloads
Authors: Wang F F , Zhang L , Qiao Z H , Li L , Wang D K 
Published: June 2020

Abstract
Rack is kind of the experimental platform that used in the space station for performing scientific experiment. Many payloads are mounted on Rack with limited operating space. The shipment of a Rack to its final destination in orbit is far more complicated than for all other commercial products. The launch vehicle-induced vibration and shock environment can be a payload killer. Based on the limited operating space, this paper proposes a screw fixation and friction-assisted fixation method. Through establishing the force and the parameters of the screw fixation and friction-assisted fixation based on the payload, deriving the mathematical model and carrying out the dynamic environment test. Test results match theoretical results quite well. The screw fixation and friction-assisted fixation method can effectively resist excessive dynamic and shock loads.