bluuebunny/crossref_metadata_2025 huggingface dataset:
Adaptive quantised control of switched stochastic strict‐feedback non‐linear systems with asymmetric input saturation
Authors: Yu Zhaoxu , Yan Huaicheng , Li Shugang , Dong Yan
Published: February 2018

The adaptive quantised tracking problem is addressed for a class of switched stochastic strict‐feedback non‐linear systems with asymmetrical input saturation in this study. With the aid of a Gaussian error function‐based continuous differentiable switching model and some special techniques, the technical difficulties from dealing with the switching asymmetric saturation non‐linearities and the sector‐bounded quantisation errors are overcome. Then, by combining the common Lyapunov function method, backstepping technique and neural network approximation‐based approach, a simple common adaptive tracking control scheme involving one adaptive parameter only is presented for such systems under arbitrary switching. The given quantised control scheme guarantees that all signals of the closed‐loop system are semi‐globally bounded in probability while the tracking error can converge to a small neighbourhood of the origin. Finally, simulation studies are provided to illustrate the effectiveness and applicability of the proposed control design.
MOND simulation suggests an origin for some peculiarities in the Local Group
Authors: Bílek M. , Thies I. , Kroupa P. , Famaey B.
Published: February 2018

Context. The Milky Way (MW) and Andromeda (M 31) galaxies possess rotating planes of satellites. The formation of these planes has not been explained satisfactorily so far. It has been suggested that the MW and M 31 satellites are ancient tidal dwarf galaxies; this might explain their configuration. This suggestion gained support by an analytic backward-calculation of the relative MW–M 31 orbit in the MOND modified dynamics paradigm. The result implied that the galaxies experienced a close flyby 7–11 Gyr ago.

Aims. Here we explore the Local Group history in MOND in more detail using a simplified first-ever self-consistent simulation. We describe the features induced by the encounter in the simulation and identify possible real counterparts of these features.

Methods. The initial conditions were set to eventually roughly reproduce the observed MW and M 31 masses, effective radii, separation, relative velocity, and disk inclinations. We used the publicly available adaptive-mesh-refinement code Phantom of RAMSES.

Results. Matter was transferred from the MW to M 31 along a tidal tail in the simulation. The encounter induced the formation of several structures resembling the peculiarities of the Local Group. Most notably are that 1) a rotating planar structure formed around M 31 from the transferred material. It had a size similar to the observed satellite plane and was oriented edge-on to the simulated MW, just as the real plane. 2) The same structure also resembled the tidal features observed around M 31 by its size and morphology. 3) A warp in the MW developed with an amplitude and orientation similar to that observed. 4) A cloud of particles formed around the simulated MW, with the extent of the actual MW satellite system. The encounter did not end by merging in a Hubble time. The simulated stellar disks also thickened as a result of the encounter.

Conclusions. The simulation demonstrated that MOND might explain many peculiarities of the Local Group; this needs to be verified with additional simulations. The simulation moreover showed that tidal features observed in galaxies, usually interpreted as merger remnants, could have been formed by matter exchange during non-merging galactic flybys in some cases.
Multi-epoch monitoring of the AA Tauri-like star V 354 Mon
Authors: Schneider P. C. , Manara C. F. , Facchini S. , Günther H. M. , Herczeg G. J. , Fedele D. , Teixeira P. S.
Published: February 2018

Disk warps around classical T Tauri stars (CTTSs) can periodically obscure the central star for some viewing geometries. For these so- called AA Tau-like variables, the obscuring material is located in the inner disk and absorption spectroscopy allows one to characterize its dust and gas content. Since the observed emission from CTTSs consists of several components (photospheric, accretion, jet, and disk emission), which can all vary with time, it is generally challenging to disentangling disk features from emission variability. Multi- epoch, flux-calibrated, broadband spectra provide us with the necessary information to cleanly separate absorption from emission variability. We applied this method to three epochs of VLT/X-shooter spectra of the CTTS V 354 Mon (CSI Mon-660) located in NGC 2264 and find that: (a) the accretion emission remains virtually unchanged between the three epochs; (b) the broadband flux evolution is best described by disk material obscuring part of the star, and (c) the Na and K gas absorption lines show only a minor increase in equivalent width during phases of high dust extinction. The limits on the absorbing gas column densities indicate a low gas-to-dust ratio in the inner disk, less than a tenth of the ISM value. We speculate that the evolutionary state of V 354 Mon, rather old with a low accretion rate, is responsible for the dust excess through an evolution toward a dust dominated disk or through the fragmentation of larger bodies that drifted inward from larger radii in a still gas dominated disk.
Stellar metallicity variations across spiral arms in disk galaxies with multiple populations
Authors: Khoperskov S. , Di Matteo P. , Haywood M. , Combes F.
Published: February 2018

This Letter studies the formation of azimuthal metallicity variations in the disks of spiral galaxies in the absence of initial radial metallicity gradients. Using high-resolution N-body simulations, we model composite stellar discs, made of kinematically cold and hot stellar populations, and study their response to spiral arm perturbations. We find that, as expected, disk populations with different kinematics respond differently to a spiral perturbation, with the tendency for dynamically cooler populations to show a larger fractional contribution to spiral arms than dynamically hotter populations. By assuming a relation between kinematics and metallicity, namely the hotter the population, the more metal-poor it is, this differential response to the spiral arm perturbations naturally leads to azimuthal variations in the mean metallicity of stars in the simulated disk. Thus, azimuthal variations in the mean metallicity of stars across a spiral galaxy are not necessarily a consequence of the reshaping, by radial migration, of an initial radial metallicity gradient. They indeed arise naturally also in stellar disks which have initially only a negative vertical metallicity gradient.
Detection of interstellar HCS and its metastable isomer HSC: new pieces in the puzzle of sulfur chemistry
Authors: Agúndez M. , Marcelino N. , Cernicharo J. , Tafalla M.
Published: February 2018

We present the first identification in interstellar space of the thioformyl radical (HCS) and its metastable isomer HSC. These species were detected toward the molecular cloud L483 through observations carried out with the IRAM 30 m telescope in the λ3 mm band. We derive beam-averaged column densities of 7 × 1012 cm−2 for HCS and 1.8 × 1011 cm−2 for HSC, which translate into fractional abundances relative to H2 of 2 × 10−10 and 6 × 10−12, respectively. Although the amount of sulfur locked by these radicals is low, their detection allows placing interesting constraints on the chemistry of sulfur in dark clouds. Interestingly, the H2CS/HCS abundance ratio is found to be quite low, ~1, in contrast with the oxygen analog case, in which the H2CO/HCO abundance ratio is around 10 in dark clouds. Moreover, the radical HCS is found to be more abundant than its oxygen analog, HCO. The metastable species HOC, the oxygen analog of HSC, has not yet been observed in space. These observational constraints are compared with the outcome of a recent model of the chemistry of sulfur in dark clouds. The model underestimates the fractional abundance of HCS by at least one order of magnitude, overestimates the H2CS/HCS abundance ratio, and does not provide an abundance prediction for the metastable isomer HSC. These observations should prompt a revision of the chemistry of sulfur in interstellar clouds.
Multiple linear regression for the analysis of the parameters used in dyes decolourisation by ozonation techniques
Authors: Fatimah Siti , Wiharto Wiharto
Published: February 2018

The ozonation process of dye Acid Orange 7 (AO7), Acid Yellow 19 (AY19), and Acid Black 1 (AB1) have been performed. The experimental results predicted the magnitude of the influence of each variable by using Multiple Linear Regression (MLR). This process produces predictive modeling of the variables studied. The variables studied in this ozonation process are independent variables consisting of ozone concentration (mg/L), concentration of dye (mg/L), pH and temperature (°C). The dependent variables studied were the percentage of dye decolorization. The feasibility of the prediction model used has also been tested using the t-test. Based on the prediction model, R2 values for AO7, AY19, and AB1 dyes are 0.84. 0.87, and 0.93 respectively. The analysis of the influence of the independent variables on the percentage of dye decolorization predicted that the concentration of ozone, dyestuff concentration and pH, significantly influenced the ozonation process of AO7, AY19, and AB1. In the ozonation process the temperature variables have a significant effect on AY19 and AB1, but stronger influence on AO7 ozonation process. Based on the predictions of the influence of each variable, the process in the laboratory can be optimized more effectively and efficiently, so that the cost and time factor can be reduced.
Catalytic performance of surface modified-niobic acid
Authors: Dwiatmoko Adid Adep
Published: February 2018

Surface modification of niobic acid with phosphoric acid and its catalytic performance in the hydrolysis reaction has been studied. A series of catalysts, surface-modified with different concentration of phosphoric acid, have been prepared and characterized. It was found that the catalyst selectivity to glucose increased with the increase of acid concentration used for the surface modification. The extent of selectivity enhancement of the modified catalysts showed a good relationship with the atomic ratio of phosphorous and niobium on the surface.
Supercritical CO2 extraction of red butterfly wing leaves: process parametric study towards extraction yield
Authors: Mohd Ariff Mohd Azahar , Abdul Ghani Zulkifli , Abdul Razak Noor ‘Aina , Osman Mohamed Syazwan , Jaafar Jefri
Published: February 2018

This research illustrates the parametric studies for determining the relationship between the operating parameters used in the supercritical fluid extraction (SFE) and the extraction yield of Red Butterfly Wing (RBW) leaves. In this study, SFE used carbon dioxide (CO2) as the main solvent and ethanol as the co-solvent. SFE was operated by manipulating few parameters such as temperature, pressure and also particle size in order to determine the extraction yield. The RBW leaves were purchased from the local supplier and then undergone cleaning, drying, grinding as well as sieving processes. 5 grams of grinded leaves was then run through SFE machine. For the temperature, it was observed that the extraction yield increased starting from 40°C to 50°C and dropped after that. The optimum temperature was 50°C with extraction yield of 2.94%. For the pressure, the trend of the extraction yield was directly proportional to the pressure. As the pressure increased, the extraction yield also increased. The optimum extraction yield was 2.45 % at 375 bar. Meanwhile, the particle size was inversely proportional to the extraction yield. The optimum extraction yield was 3.26 % at 63 μm.
Droplet size distribution measurement of water in kerosene by the buoyancy weighing-bar method
Authors: Tambun Rondang , Sibagariang Piety , Alphantaria Brigitta , Rambe Ahmad Mulia
Published: February 2018

The buoyancy weighing-bar method (BWM) is a method that requires a simple apparatus set up yet produce the high accuracy result in particle size distribution measurement both settling and floating particles. The principle of this experiment that measurement the density change in a suspension due to particle migration is measured by weighing buoyancy against a weighing bar hung in the suspension, and the particle size distribution is calculated using the length of the weighing bar and the time–course change in the apparent mass of the weighing bar. In this study, the BWM was applied to determine the separation time and droplet size distribution for liquid-liquid systems with the different density. The mixture of 99 % of kerosene and 1 % of water were used as samples. The data obtained of separation time of water-kerosene mixture by the BWM were analyzed by the gas chromatography, and the droplet size distributions were compared to Coulter counter method. Based on the data obtained, the BWM could be used to determine the optimal time of waterkerosene separation. The BWM also could measure the droplet size distribution of water in kerosene and the data obtained were comparable to that measured by Coulter counter method. Hence, the BWM is a novel method in separation time determination of water-kerosene mixture and droplet size distribution measurement of water in kerosene.
Preparation of activated carbon from banana peel waste for reducing air pollutant from motorcycle muffler
Authors: Chafidz Achmad , Astuti Widi , Hartanto Dhoni , Mutia Aulia Septiani , Sari Purtiah Rantau
Published: February 2018

The exhaust gas or emission from motor vehicle contains various pollutants and some of them are toxic and very harmful for human health. In the present work, we prepared an activated carbon to reduce the toxic pollutants (via adsorption process) from the exhaust gas of the motor vehicle (particularly motorcycle in this work). The activated carbon was prepared from local banana peel which considered as an agricultural waste without economic value. To prepare the activated carbon, banana peel was carbonized using furnace at 500°C. Then the resulted carbon was activated using chemical activation with ZnCl2 and physical activation with either microwave (300 W) or furnace (700°C). The prepared activated carbon was then characterized using Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FT-IR) analysis. The SEM result showed that the pore of microwave induced ZnCl2 activated carbon (ACM) was larger than the pore of virgin char/carbon and furnace induced ZnCl2 activataed carbon (ACF). The FT-IR spectrum of ACM showed some peaks at 3408.59 cm-1, 1589.25 cm-1, and 1093.63 cm-1. They are assigned to O-H stretching, C=O stretching, and C-OH stretching. Additionally, the adsorption performance of the prepared activation carbon to reduce the pollutants concentration (i.e. CO and CH) from the exhaust gas of motor vehicle was investigated. The results showed that the activated carbon induced by microwave and ZnCl2 activation (ACM) gave the best result. The adsorption or removal efficiency of gas CO reached approximately 97.64 %vol.
Effect of Na2SO3 concentration to drug loading and drug release of ascorbic acid in chitosan edible film as drug delivery system membrane
Authors: Kistriyani Lilis , Yulianto Muhammad Farid , Prasetya Y. Rifqi
Published: February 2018

Chitosan is a type of carbohydrate compounds produced from waste marine products, in particular the class of shrimp, crabs and clams. Chitosan is often process into edible films and utilized for food packaging also has potential as a membrane for drug delivery system. Drug loading and drug release can be controlled by improve the characteristics of the membrane by adding crosslinker. The purpose of this research is to study the effect of addition of crosslinker to the rate of loading and release of ascorbic acid in the chitosan edible film. Na2SO3 was used as crosslinker. Two grams of chitosan was dissolved into 100 ml of distilled water. Acetic acid and plasticizer were added in the solution then heated at 50°C. Na2SO3 solution with mass various of Na2SO3 dissolved, 01026 0.3; and 0.5 grams were added about 30 mL to make edible film. The analysis include of drug loading, drug release and tensile strength. The result showed that the loading of edible film with crosslinker 0.15 g; 0.3 g; and 0.5 g respectively were 60.98 ppm; 52.53 ppm; and 40.88 ppm, meanwhile for the release with crosslinker 0.15 g; 0.3 g; and 0.5 g respectively were 3.78 ppm; 5.72 ppm; and 5.97 ppm.
Analyzing the potential and the load evaluation on Ubrug hydro power plant of Sukabumi, West Java
Authors: Notosudjono Didik , Wismiana Evita , Alamsyah Fitrah , Ramadhon Bagus Dwi
Published: February 2018

Built in 1923, the Ubrug Hydro Power Plant in Sukabumi was set up with an installed power of 5,94 MW on 1st unit and 2nd unit and 6,48 MW on the 3rd unit resulting in sum total of 18,36 MW. However, at present, the actual total power only generates 15,045 MW, a smaller number than its initial capacity, due to the lack of water discharge. Based on the measurement data, the load of the generator has experienced a decrease of power in normal field operation with a peak load of 9,5 MW and the lowest of 6 MW. On daily operations, only 2 generators are being operated, leaving the 3rd generator unoperated. This is due to the aging hydroelectric power plant on the location and the transition of forest functions in the upstream area, that serves as water absorption, to settlements of residents, and industrial estates. The other and the most salient cause is the waste carried by the Cicatih River coming along with the flow of water in the conduit.
Early detection of LPG gas leakage based Wireless Sensor Networking
Authors: Kusriyanto Medilla , Firdaus  , Yulianto Andik , Kurniawan Syakban
Published: February 2018

LPG gas is the main fuel used in households. These days LPG gas leak triggered an accident that resulted in huge losses, especially if the accident occurred within the dense housing. LPG gas leakage monitoring and early detection of a gas leak and a leak warning is needed to prevent more fatal accident. Wireless sensor networking is a technology that can be used to build a centralized monitoring system by using a microcontroller as the interface and control system. This research developed system device monitoring and early detection of gas leaks by utilizing gas sensors MQ-4 and AVR microcontroller family as control devices. The system is also equipped with XBee PRO S2B nirkable devices as the interface to the wireless networking system that is used to transmit sensor data from the detection point to the monitoring center equipped with a PC and software integrated Visual Basic. Gas leak alert is sent with the message formats through social networking Gtalk.
Filling machine preventive maintenance using age replacement method in PT Lucas Djaja
Authors: Mustofa Fifi Herni , Utomo Ria Ferdian , Soemadi Kusmaningrum
Published: February 2018

PT Lucas Djaja is a company engaged in the pharmaceutical industry which produce sterile drugs and non-sterile. Filling machine has a high failure rate and expensive corrective maintenance cost. PT Lucas Djaja has a policy to perform engine maintenance by way of corrective maintenance. The study focused on the critical components, namely bearing R2, bearing 625 and bearing 626. When the replacement of the failure done by the company is currently using the formula mean time to failure with the result of bearing R2 at point 165 days, bearing 625 at a point 205 days, and bearing 626 at a point 182 days. Solutions generated by using age replacement method with minimization of total maintenance cost given on the bearing R2 at a point 60 days, bearing 625 at the point of 80 days and bearing 626 at a point 40 days.
Incorporating Hofstede’ National Culture in Human Factor Analysis and Classification System (HFACS): Cases of Indonesian Aviation Safety
Authors: Pratama Gradiyan Budi , Widyanti Ari , Sutalaksana Iftikar Zahedi
Published: February 2018

National culture plays an important role in the application of ergonomics and safety. This research examined role of national culture in accident analysis of Indonesian aviation using framework of Human Factors Analysis and Classification System (HFACS). 53 Indonesian aviation accidents during year of 2001-2012 were analyzed using the HFACS framework by authors and were validated to 14 air-transport experts in Indonesia. National culture is viewed with Hofstede’ lens of national culture. Result shows that high collectivistic, low uncertainty avoidance, high power distance, and masculinity dimension which are characteristics of Indonesian culture, play an important role in Indonesian aviation accident and should be incorporated within HFACS. Result is discussed in relation with HFACS and Indonesian aviation accident analysis.
The effectiveness of single minute exchange of dies for lean changeover process in printing industry
Authors: Indrawati Sri , Pratiwi Mentari Endah , Sunaryo  , ‘Azzam Abdullah
Published: February 2018

The changeover time is a factor that greatly affects the lean production implementation in industry with make to order system. Large product variations and unpredictable quantity of orders will trigger some kind of production wastes if changeover time is done in a longer time. One industry with make to order system is printing industry. In general, to produce several types of products such as books takes quite a long time because of long production changeover process. The general problem faced is the delay in book’s production completion. Based on this problem, changeover time reduction is needed to overcome the delay of book’s production completion using single minute exchanges of dies (SMED) method. The SMED method is the method that separates the changeover activity into two, i.e. internal setup and external setup. The research shows that changeover time for printing workstation is 18 minutes 29 seconds, which consists of internal setup activities 14 minutes 37 seconds and external setup 4 minutes 33 seconds. By converting 45% of the internal setup activity into an external setup, then the setup time can be reduced. The initial setup activities performed when machine is stop, now can be done when the machine is running. In addition, a changeover process improvement also done using 5S method in workstation tools area so the internal setup time is reduced 46% becomes 7 minutes 59 seconds. Under these conditions, the printing industry can increase production by 2%.
Work facility design for VCO operator using integrated quality function deployment and Analytic Hierarchy Process
Authors: Indrawati Sri , ‘Azzam Abdullah , Wiliyanti Wini
Published: February 2018

The Musculoskeletal disorder (MSDs) is skeletal muscle disorders that lead to damage in nerves, muscles, joints and cartilages. The damage is caused by muscle tension and degeneration. From the preliminary research in virgin coconut oil (VCO) processing industry, Central Java, Indonesia, there are potential risk of MSDs for workers. The majority of operators complaining on the right thigh (score 37) and left thigh (score 35). In addition, 50% of operators is work with moderate risk (rapid entire body assessment scores 4-7) and 50% others at a high risk level (rapid entire body assessment scores 8-10). Therefore, improvement is needed to prevent MSDs through work facility design using an integrated quality function deployment (QFD) method. In QFD, there is a concept screening phase to select some product design concept. To determine the priority, the QFD method can be integrated with analytic hierarchy process (AHP) method. The research shows that attributes of work facility needed by user are ergonomic, portable, durable and aesthetic. Concept design B have the highest priority score 0,32 and selected as the final work facility design. The technical specification are made from mahogany wood with an attractive design, red colour combination and developed based on user's anthropometry data.
Evaluation on performance and SME’s productivity with discrete system simulation approach
Authors: Sabit M. Iqbal , Purba Reno Dias Anggara , Sulistio Joko
Published: February 2018

Inventory becomes one of important aspects to identify whether a company has fulfilled the consumers’ demands or not. Shortage of stock, finished goods particularly could emerge the failure of accomplishing the target of consumers’ demand that could also lead to loss of sales. Therefore, it needs good inventory control. This paper is objected improve SME’s productivity by using the approach of discrete system simulation of aluminum industry that rapidly developed in Yogyakarta. Simulation is one of the appropriate tools for experiments that purposed to identify best response from system components. Based from Observation from line production, there are semi-finished products were not finished. Other than that the firm has no clue to solve the problem. Design of experiment and scenario are developed in a model that was built to obtain solution in enhancing the performance and productivity. As the result of initial performance that is not optimal, rescheduling on transporter schedule and the replenishment of machines and operators on the lathing process could be performed as improvements to enhance the productivity. This experiment can be used as the solution in improving the product’s output as 64.36%.
Determining the vehicles routes by considering its different types and capacity (heterogeneous) to minimize the total distribution cost
Authors: Nurhidayat  , Purwani Annie
Published: February 2018

Packaged sugar is one of the products in sugar cane manufacture, PT Madubaru Yogyakarta. Currently, the company deals with a high distribution cost because there is no plan to determine the vehicle route, vehicle type, and capacity for distributing the product. In this research, the optimum route of the distributing vehicles is developed. The company has three different types and capacity of vehicles: L300, HD, and PS. A problem in determining the distribution route here is called as Vehicle Routing Problem (VRP). The basic form of classic VRP says that all vehicles owned by a company have the same capacity (homogenous), meanwhile not all companies have the vehicles with same capacity. The heterogeneous variant is used to minimize the fixed cost of vehicles and distribution variant cost using Sequential Insertion Algorithm. This research has three purposes; are minimizing the number of vehicles used (NV), Total time of Completion tour (TCT) and Distribution Total Cost (TCD). The results based on a test calculation of a shipment date (August 19, 2016) of the company show three alternative solutions to distribute the packaged sugar to 12 consumers. The third alternative solution is the optimal solution and chosen as the decision result of the packaged sugar shipment. Based on the calculation results, it is needed 2 vehicles type HD with capacity 7,000 kg and type PS with capacity 3,500 kg, with total time of completion tour (TCT) is 828.49 minutes or 13.81 hours, and distribution total cost is IDR. 959,011.
Quantitative analytical hierarchy process to marketing store location selection
Authors: Harwati  , Utami Intan
Published: February 2018

The selection of Store to market the product is belong to Multi Criteria Decision Making problem. The criteria used have conflict of interest with each other to produce an optimal location. This research uses four important criteria to select new location of marketing store appropriate with the references: distance to location, competition level with competitor, number of potential customer, and location rent cost. Quantitative data is used to determine the optimum location with AHP method. Quantitative data are preferred to avoid inconsistency when using expert opinion. The AHP result optimum location among three alternatives places.
The mental workload analysis of safety workers in an Indonesian oil mining industry
Authors: Indrawati Sri , Prabaswari Atyanti Dyah , Pradipta Tasya
Published: February 2018

The responsibilities of occupational health and safety workers are very hard to ensure other workers is safety. The responsibility make the workers of occupational health and safety has some affecting to their job. Some effect can cause over the mental workload. This research aims to determine the score of mental workload from three professions in occupational health and safety, i.e. safetyman contractor, safetyman field and safetyman officer. Six indicators in the NASA-TLX method, i.e. mental demand (MD), physical demand (PD), temporal demand (TD), performance (OP), effort (EF) and frustration level (FR) are used to determine the worker’s mental workload. The result shows mental demand (MD) is the most dominant indicators affecting the mental workload between safetyman contractor, safetyman field and safety officer. The highest mental workload score among safety workers is on the safetyman field with WWL score at 62,38, because among the three types safety workers, the highest MD is on the safetyman field due to the responsibility.
Fuel distribution process risk analysis in East Borneo
Authors: Laksmita Raizsa , Djati Widodo Imam
Published: February 2018

Fuel distribution is an important aspect of fulfilling the customer’s need. It is risky because it can cause tardiness that can cause fuel scarcity. In the process of distribution, many risks are occurring. House of Risk is a method used for mitigating the risk. It identifies seven risk events and nine risk agents. Matrix occurrence and severity are used for eliminating the minor impact risk. House of Risk 1 is used for determining the Aggregate Risk Potential (ARP). Pareto diagram is applied to prioritize risk that must be mitigated by preventive actions based on ARP. It identifies 4 priority risks, namely A8 (Car trouble), A4 (Human Error), A3 (Error deposit via bank and underpayment), and A6 (traffic accident) which should be mitigated. House of Risk 2 makes for mapping between the preventive action and risk agent. It gets the Effectiveness to Difficulty Ratio (ETD) for mitigating action. Conducting safety talk routine once every three days with ETD 2088 is the primary preventive actions.
Job safety and awareness analysis of safety implementation among electrical workers in airport service company
Authors: Putra Perdana Suteja , Sari Amarria Dila , Husna Amirah Shafa
Published: February 2018

Electrical is a fundamental process in the company that has high risk and responsibility especially in public service company such as an airport. Hence, the company that operates activities in the airport has to identify and control the safety activities of workers. On the safety implementation, the lack of workers’ awareness is fundamental aspects to the safety failure. Therefore, this study aimed to analyse the safety awareness and identify risk in the electrical workplace. Safety awareness questionnaires are distributed to ten workers in order to analyse their awareness. Job safety analysis method used to identify the risk in the electrical workplace. The preliminary study stated that workers were not aware of personal protective equipment usage so that the awareness and behavioural need to be analysed. The result is the hazard was found such as electrical shock and noise for various intensity in the workplace. While electrical workers were aware of safety implementation but less of safety behaviour. Furthermore, the recommendation can be implemented are the implementation of behaviour-based safety (BBS), 5S implementation and accident report list.
House of risk approach for assessing supply chain risk management strategies: A case study in Crumb Rubber Company Ltd
Authors: Immawan Taufiq , Putri Dea Kusuma
Published: February 2018

Risk is an uncertain and can have both negative and positive impacts. If the risks have a negative impact then a company will incur losses. CRUMB RUBBER COMPANY LTD is one of crumb rubber company in West Kalimantan. The length of the supply chain contained in CRUMB RUBBER COMPANY LTD and the high dependence on suppliers leads to vulnerability. So the purpose of this research is to identify the risk and determine the priority of source of risk along with the priority of handling it on CRUMB RUBBER COMPANY LTD supply chain with House of Risk approach. House of risk approach consists of two phases. Phase 1 is used to determine the dominant risk agent and phase 2 determines the effective action to deal with the dominant risk agent. From the research results, there are 19 risk events and 29 risk agents identified. The result of house of risk in phase 1 is known that 13 of 28 risk agents are dominant risk agent. Then the priority handling strategy in house of risk in phase 2, in this phase obtained 18 priority risk handling strategies.
Modified technology acceptance model for hospital information system evaluation – a case study
Authors: Helia Vembri Noor , Asri Vikha Indira , Kusrini Elisa , Miranda Suci
Published: February 2018

Hospital Information Systems (HIS) has been widely used in Indonesia. This implementation in hospital needs comprehensive, integrated information system designed to manage all the aspects of a hospital's operation. One of the factors that currently plays an important role in the successful HIS’s application is the user factor. The hospital can evaluate HIS from user factor, so that it becoming better, perfect and can support the objectives, vision and mission of the hospital. This study aims to use the Modified Technology Acceptance Model created in Structural Equation Modeling (SEM) and tested using the software Amos 20 to determine the variables that most influence in HIS’s application using in several hospitals in Sleman, Daerah Istimewa Yogyakarta Province, Indonesia. Data collected by distributing questionnaires to employees of D grade hospitals in Sleman district. The results from this study are seven variables that may influence the user in using HIS (Subjective Norm, Perceived Usefulness, Perceived Ease of Use, User Satisfaction, Behavior Intention to Use, Attitude Toward Using, Actual System Usage) and significant or insignificant relationship among them.
The effect of microwax composition on the staining quality of Klowong Batik Wax
Authors: Malik Abdul , Rahmillah Fety Ilma , Atmaja Bayu Dwi , Ihsan Bilal Fatihul
Published: February 2018

Batik is one of the most highly developed Indonesian art forms that had been designated by UNESCO as a Masterpiece of Oral and Intangible Heritage of Humanity. Batik wax is considered as the main material to make Batik, especially for handmade Batik in which the pattern and carve applied directly by the artisans. Melted wax (Malam) is made from a mixture of melted damar mata kucing, gondorukem, beeswax, and paraffin. This study aimed to substitute the beeswax which was difficult to find into microwax made from paraffin which is available in huge amount as well as easily searchable. Microwax varied as many as four samples with the equal variable. The samples were then tested used Spectrophotometer to test the colour difference, colour ageing test, rub test (wet, dry, and endurance soap). The results showed that microwax can be used to substitute the function of beeswax with appropriate composition. It is highly expected that the increasing of melted wax quality can increase the quality of Batik itself as well as the preservation of Indonesian Batik as a cultural heritage.
Recycled fiber from straw waste: effect of take-up speed and spinneret diameter to linear density and tenacity
Authors: Soekoco Asril S. , Mustafa Dody , Rosmawat  , Jane
Published: February 2018

Recycled fiber has a great potential as a solution to meet overgrowing synthetic fiber demand and reduce plastic waste in the same time. In the previous research, bottle cap waste is used as the material of the recycled fiber. The result shows that fiber tenacity of recyled fiber from bottle cap waste has low tenacity, different polymer. This phenomena may have been caused by the present of pigment molecule. This research focused on producing recycled fiber from straw waste which has low pigment content. Straw waste was washed and cleaned before the cutting process. Then, the waste was processed in the experiment melt spinning machine with plunger system and single hole orifice in various diameter, 4 mm, 10 mm and 15 mm. The processing temperature was 140° C temperature in three take-up speed, 3.00 m/minutes, 10.30 m/ minutes and 19.16 m/ minutes. The diameter and cross section shape of recycled polyethylene fiber were obtained by using electric microscope with software assistance. The linear density of the recycled fiber was analysed by calculating it with denier and the mechanical strength of the fiber was measured in accordance with the ASTM D 3379-75 standard. High take-up speed leads to higher linear density and take-up speed value is proportionally linear with the tenacity of fiber produced. Moreover, the spinneret diameter is proportionally linear with linear density but it is inversely linear with the tenacity of the fiber produced.
Study of voice data communication using network streams on dataflow programming
Authors: Prasetio Barlian Henryranu , Syauqy Dahnial , Maulana Rizal , Setyawan Gembong Edhi
Published: February 2018

In this paper, we implement a voice data communications between sender and receiver through Wi-Fi. The system was designed and implemented using network stream protocol which was developed by National Instruments on Lab-VIEW between two devices. The device which acts as the sender was My-RIO board and the receiver device was Personal Computer. The voice data communication system was tested by observing the effect of various buffer sizes on the throughput, latency and CPU usage. The result showed that the larger the buffer size being used, the throughput values were also getting bigger. However, particular buffer size made the throughput became saturated. The change on the buffer size also directly affects CPU usage. It seemed that the buffer size did not affect latency significantly. It showed that the latency was stable with an average of 13 milliseconds on voice data transmission.
The using of readutainment as e-learning to improve students’ reading comprehension skill
Authors: Dwiastuty Nina , Susilawati  , Sulhan Muhammad
Published: February 2018

Technology grows and has changed life styles in many aspects. It offers simplicity and practicality to human to switch the life easier from traditional to modern creativity. In the education context, the use of e-learning as a product of technology in the language learning is inevitable and has made language teachers find new teaching strategies. This action research aims to prove whether the innovation of Readutainment application as e-learning enables students to improve their reading comprehension skill. This application usage is to facilitate students to comprehend. English texts. The research object were private vocational students of grade XI taken from 6 of 12 vocational schools in the districts of Singaparna and Leuwisari, West Java. It uses a purposive random sampling by considering that all students are homogeneous in their cognitive levels. The method of this research is qualitative action based on students’ studying in the cloud classrooms in two cycle designs. The result shows that the use of Readutainment can improve students’ ability to comprehend English texts. It is proven that after being treated by using the Readutainment in two cycles, the average score increases from 68 to 70 in the first cycle and 75 in the second cycle.
The design of e-learning applications by considering aspects of the user’s personality based on students take courses in human-computer interaction
Authors: Supangat  , Chandar Francisca Haryati , Hermanto Agus
Published: February 2018

The success of an E-Learning is determined from two elemen such as instructional design and user interface design. This study focuses on user interface design. To get a user interface design that suits the personality of students, with carried out research using data mining in e-learning participants. This study uses association rule mining to user design interface of an e-learning application. From the results of the process of training and testing of the 344 (three hundred and forthty-four) dataset consisting of 233 datasets training and 121 datasets testing, introverted personality types, shows that there are two combinations that come from these two processes when counting frequent itemset, namely: { Times New Roman, Blue, White} and {White, Black, Calibri}, whereas personality types extrovert, no combination of dominant favored by this type, and the results are identical to the results of the process of training data, with a choice of preferred color is Blue as foreground and background colors are White. Both of these colors appear in the results of the process of training and testing datasets, with selected font is Arial.
Rheumatoid arthritis and the challenge of using nanoparticles for its treatment
Authors: Chabib Lutfi , Ikawati Zullies , Martien Ronny , Ismail Hilda , Wahyudi Made Dwi Pradipta , Arimurni Dewa Ayu , Muhtadi Wildan Khairi , Hidayat Arif
Published: February 2018

Rheumatoid arthritis is the most common autoimmune disease that affects the joints. The cause of the disease is unknown, many studies proposed hypothesis about the etiology of rheumatoid arthritis. The clinical manifestations of arthritis are different in each patients. In addition, the development of the medication is still continue to achieve the most effective role with less side effect. Nanoparticles may be the answer to this problem, since they have been widely used to improve the pharmacokinetic and pharmacodynamics of rheumatoid arthritis drugs. Using nanoparticles-tagged folate or PEG to deliver rheumatoid arthritis drugs may increase the specificity of the drugs to the target and consequently, may decrease the side effects of the drugs. The purpose of this review is to summarize the etiology, clinical manifestation and highlighting the use of nanoparticles in rheumatoid arthritis treatment.
Experimental Investigation of Metamaterial from Ringer Conductors
Authors: Mironchev Aleksandr , Gorst Aleksandr
Published: February 2018

In this work creation of structure from ring conductors having negative index of refraction is shown. Experimental confirmation and finding of index of refraction, namely its real and imaginary part taking into account the error, for single-layer, two-layer, three-layered and four-layer structure.
Methods and Approaches for Automatic Processing and Storage of High-Potential Electrocardiogram Registered by Hardware and Software Complex on Nanosensors
Authors: Rybalka Sergey , Yuzhakov Mikhail , Ivanov Мaxim , Dang Kuang Nguyen , Kodermjatov Radik , Wenjia Guo , Maksimov Ivan , Zimin Ilya
Published: February 2018

The problems of designing the system for automatic analysis of cardiograms are considered. The structure of the system for recording and storing electrocardiograms was formed. The procedures that make up the complex of automatic analysis are listed.
Expert Systems as the Basis of Decisions in the Knowledge Society
Authors: Kvesko Svetlana , Kornienko Anna , Kvesko Bronislav , Chicherina Nataliya
Published: February 2018

The paper discusses the intelligent information systems as expert systems to meet the challenges of management in the knowledge society. These allow optimization of decision-making and simulation of the human and society activities. The focus is made on the relation between the information structure and globalization. It is emphasized that the information structure becomes the basis of public life functioning, which is based on complex industry of information processing through information technologies. Modern management approach focuses on the "strategy" construct. The latter allows timely and adequate effect. This adequacy, in turn, makes it possible to determine the long-term development of an object. The strategy appears to be optimal if it is supported by resources. Using innovations solves the problem of prediction of generated knowledge. An innovation system is able to initiate transformations in the knowledge system. The tasks solved by the expert systems involve the tasks of combined type, namely the tasks of learning, forecasting and monitoring that ensures forecast completeness, which employs a parametric dynamic model.
Some Issues of the Quality Control System Development for Telecommunications Services
Authors: Yurchenko Alexey , Serikov Tansaule , Alkina Aliya , Neshina Yelena
Published: February 2018

In connection with the rapid development of telecommunications technologies, the provision of communication quality parameters and its reliability are very relevant. In this regard, the new approaches to the operation and control of telecommunications networks are required which are inconceivable without an integrated approach to solving this problem and developing a control system not only for the network state, but also for the quality indicators of its operation. The idea of the work is to develop the control system that is able to determine the principles of strict monitoring over the telecommunications network of Kazakhtelecom JSC in Karaganda. The analysis of the key performance indicators of the telecommunications network showed that after the implementation of the Network Management System hardware and software complex, all values of quality indicators meet the regulatory values. It allows monitoring and controlling the telecommunications network at various levels of operation of basic and auxiliary equipment in a wide range of work.
Control of Levitating Particle in Ultrasound Field
Authors: Sukhanov Dmitry , Minin Igor , Minin Oleg , Kuzmenko Ivan , Muksunov Timur , Sivkov Evgeniy , Emelyanov Fedor
Published: February 2018

The experimental setup for ultrasonic controlled levitation in the air has been developed. Two phased arrays made of 91 ultrasonic radiators placed in front of each other are used. Arrays are focused in the region of particle levitation. The length of the focus area allows us to move the particles along it, controlling the standing waves through the phase difference of the two arrays.
Solution of Acoustic Tomographic Problems on the Basis of Numerical Simulation of Particle Dynamics
Authors: Kuzovova Angela , Kuzmenko Ivan
Published: February 2018

A method is proposed for imaging of scattering heterogeneities in continuous media on the basis of numerical modeling of forward and backward wave propagation. It is shown that the combination of a solution for backward propagation of waves and direct wave propagation allows us to visualize scattering heterogeneities. The results of numerical simulation are presented.
Near-Field Interference Microwave Diagnostics of Cultural Plants and Wood Materials
Authors: Belichenko Viktor , Zapasnoy Andrey , Mironchev Aleksandr
Published: February 2018

A schematic solution of the near-field interference microwave microscopy technology is discussed. This solution is implemented in the form of a maximally simplified microscope structure. Testing was conducted to determine the capabilities of this microscope. It is shown that technology can be used to solve a number of hygroscopy and defectoscopy problems.
Solar Simulator on the Basis of Powerful Light-Emitting Diodes
Authors: Aldoshina Oxana , Yugay Vyacheslav , Kaliaskarov Nurbol , Esenjolov Ulan , Nesipova Saltanat
Published: February 2018

The Article describes the construction design and experimental results of the Solar Simulator, based on powerful LEDs with different radiation spectrum. There was established that the block from 25 light-emitting diodes provides radiation intensity sufficient for carrying-out of AM1.5G standard requirements. Fine tuning of the resultant spectrum and the required illumination for all radiation spectral components were obtained through light-emitting diodes current control.