bluuebunny/crossref_metadata_2025 huggingface dataset:
Tea Tree Oil versus Chlorhexidine Mouthwash in Treatment of Gingivitis: A Pilot Randomized, Double Blinded Clinical Trial
Authors: Ripari Francesca , Cera Alessia , Freda Monica , Zumbo Giulia , Zara Francesca , Vozza Iole
Published: March 2020

Objective The study evaluated the efficacy of tea tree oil for the treatment of gingivitis.

Materials and Methods The tea tree oil was administered in the form of mouthwash and then compared with a mouthwash with chlorhexidine 0.12%. Both treatments were domestic and lasted for 14 days. Patients were chosen according to random criteria, aged between 18 and 60 years, and who showed a clinically evident gingivitis. In clinical evaluation, the following clinical criteria were taken into consideration: gingival index (GI), plaque index (PI), bleeding index (BI), probing depth (PD), the presence of dental dyschromia, and the presence of taste alteration. The subjects were evaluated before (T0) and after the treatment (T1), and the data collected for each patient were recorded on a periodontal chart.

Results The comparison showed that tea tree oil offered a better improvement in the evaluation of PI, BOP, and PD; furthermore, it did not cause dental dyschromia and taste alteration. In group A, treated with tea tree oil, PI decreased from 53.25 to 5.50% and BI from 38.41 to 4.22%. In group B, treated with chlorhexidine PI decreased from 47.69 to 2.37% and BI from 32.93 to 6.28%. Instead, the subjects using chlorhexidine 0.12% blamed a distaste for the product that caused a slight taste alteration; 20% of them showed iatrogenic dental dyschromia.

Conclusions The collected data showed the efficacy of both treatments. Although further research works will be necessary, this study showed that tea tree oil could be an effective nontoxic substitute for the therapy of gingivitis.
Effect of an Optical Whitening Toothpaste on Color Stability of Tooth-Colored Restorative Materials
Authors: Hashemikamangar Sedighe Sadat , Hoseinpour Farnoosh , Kiomarsi Nazanin , Dehaki Mehrzad Gholampour , Kharazifard Mohammad Javad
Published: March 2020

Objectives This study aimed to assess the effect of an optical whitening toothpaste on color stability of microhybrid, nanofilled, and microfilled composite resins and resin-modified glass ionomer (RMGI) cement in comparison of two other toothpastes.

Materials and Methods In this experimental study, disc-shaped composite samples were fabricated. The samples were then polished using silicon carbide papers. Twenty-seven samples of each material were fabricated and subjected to colorimetry using a spectrophotometer. Each group of material was then divided into three subgroups for the application of conventional whitening and whitening containing blue covarine toothpastes. One operator brushed the samples with an electric soft toothbrush with circular motion twice a day, each time for 30 seconds. Colorimetry was performed at 0, 1, 7, 30, and 90 days.

Statistical Analysis Two-way analysis of variance (ANOVA), one-way ANOVA, and Tukey’s honestly significant difference (HSD) test were used for statistical analysis.

Results The interaction effect of type of restorative material and time on ∆E was not significant at baseline or 1 day (p > 0.05). The effect of type of toothpaste on ∆E was not significant at baseline or 1 day (p = 0.78) but the effect of type of material was significant (p < 0.05). The toothpastes had significantly different effects on ∆E of Z250 at all time points (p < 0.05) except for ∆E0–30 (p = 0.106). The toothpastes had significantly different effects on ∆E of Z350 and Gradia at all time points (p < 0.05). The same was true for RMGI except for ∆E0–7 (p = 0.43) and ∆E0–90 (p = 0.52). The majority of color changes caused by toothpastes were not clinically perceivable (∆E < 3.3), except for ∆E0–90 by the whitening toothpaste (∆E = 9), ∆E0–90 by the conventional toothpaste for Z350 (∆E = 3.9), and ∆E0–1 by the whitening toothpaste for RMGI (∆E = 3.7).

Conclusion The color change of all composite samples was not clinically perceivable (<3.3) at all time points, which shows that the tested toothpastes do not cause a significant change in color of composite materials.
Correction: Language as shaped by the environment: linguistic construal in a collaborative spatial task
Authors: Nölle Jonas , Fusaroli Riccardo , Mills Gregory J. , Tylén Kristian
Published: March 2020

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Current status and highlights of the ELI-NP research program
Authors: Tanaka K. A. , Spohr K. M. , Balabanski D. L. , Balascuta S. , Capponi L. , Cernaianu M. O. , Cuciuc M. , Cucoanes A. , Dancus I. , Dhal A. , Diaconescu B. , Doria D. , Ghenuche P. , Ghita D. G. , Kisyov S. , Nastasa V. , Ong J. F. , Rotaru F. , Sangwan D. , Söderström P.-A. , Stutman D. , Suliman G. , Tesileanu O. , Tudor L. , Tsoneva N. , Ur C. A. , Ursescu D. , Zamfir N. V.
Published: March 2020

The emergence of a new era reaching beyond current state-of-the-art ultrashort and ultraintense laser technology has been enabled by the approval of around € 850 million worth of structural funds in 2011–2012 by the European Commission for the installation of Extreme Light Infrastructure (ELI). The ELI project consists of three pillars being built in the Czech Republic, Hungary, and Romania. This challenging proposal is based on recent technical progress allowing ultraintense laser fields in which intensities will soon be reaching as high as I0 ∼ 1023 W cm−2. This tremendous technological advance has been brought about by the invention of chirped pulse amplification by Mourou and Strickland. Romania is hosting the ELI for Nuclear Physics (ELI-NP) pillar in Măgurele near Bucharest. The new facility, currently under construction, is intended to serve the broad national, European, and international scientific community. Its mission covers scientific research at the frontier of knowledge involving two domains. The first is laser-driven experiments related to NP, strong-field quantum electrodynamics, and associated vacuum effects. The second research domain is based on the establishment of a Compton-backscattering-based, high-brilliance, and intense γ beam with Eγ ≲ 19.5 MeV, which represents a merger between laser and accelerator technology. This system will allow the investigation of the nuclear structure of selected isotopes and nuclear reactions of relevance, for example, to astrophysics with hitherto unprecedented resolution and accuracy. In addition to fundamental themes, a large number of applications with significant societal impact will be developed. The implementation of the project started in January 2013 and is spearheaded by the ELI-NP/Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH). Experiments will begin in early 2020.
Spin—Based voltage comparator using spin-hall effect driven nanomagnets
Authors: Wasef S. , Fariborzi H.
Published: March 2020

In this work, we propose a spin-based voltage comparator using a hybrid spin-CMOS circuit model. In particular, we use a 3T-MTJ (three-terminal magnetic tunnel junction) model with an in-plane magnetic anisotropy (IMA) free layer employing a spin-orbit torque (SOT) based writing scheme in the thermal activation regime to demonstrate a comparator circuit with a resolution close to 50mV. The 3T-MTJ model of the comparator was validated against existing experimental results. In addition, we analyze the delay performance of the comparator along with matching the switching delay of the MTJ with an analytical model. We also discuss potential extensions to the model and general directions for future work.
Epitaxial Er-doped Y2O3 on silicon for quantum coherent devices
Authors: Singh Manish Kumar , Prakash Abhinav , Wolfowicz Gary , Wen Jianguo , Huang Yizhong , Rajh Tijana , Awschalom David D. , Zhong Tian , Guha Supratik
Published: March 2020

Rare-earth ions (REIs) have incomplete 4f shells and possess narrow optical intra-4f transitions due to shielding from electrons in the 5s and 5p orbitals, making them good candidates for solid-state optical quantum memory. The emission of Er3+ in the telecom C-band (1530 nm–1565 nm) makes it especially attractive for this application. In order to build practical, scalable devices, the REI needs to be embedded in a non-interacting host material, preferably one that can be integrated with silicon. In this paper, we show that Er3+ can be isovalently incorporated into epitaxial Y2O3 thin films on Si (111). We report on the synthesis of epitaxial, single-crystalline Er:Y2O3 on Si with a narrow inhomogeneous linewidth in the photoluminescence (PL) spectra, 5.1 GHz (<100 mK), and an optical excited state lifetime of 8.1 ms. The choice of Y2O3 was driven by its low nuclear spin and small lattice mismatch with Si. Using PL and electron paramagnetic resonance, we show that Er3+ substitutes for Y in the crystal lattice. The role of interfacial SiOx, diffusion of silicon into the film, and the effect of buffer layers on the inhomogeneous PL linewidth are examined. We also find that the linewidth decreased monotonically with film thickness but surprisingly exhibits no correlation with the film crystalline quality, as measured by the x-ray rocking curve scans, suggesting other factors at play that limit the inhomogeneous broadening in Y2O3 films.
Spectroscopic study of GdVO4 : Yb + Er crystals
Authors: Klimin S.A. , Loiseau P. , Caurant D. , Popova M.N.
Published: March 2020

GdVO4 crystals doped with different erbium and ytterbium concentrations have been grown in order to study their spectroscopic and kinetic properties and identify the nature of active centres in them. Their polarised transmission and luminescence spectra have been used to construct energy level diagrams of the Er3+ ion. The lifetime of the lower level of the 4I11/2 excited-state multiplet has been shown to decrease markedly with increasing ytterbium concentration. Inequivalent erbium centres have been observed to form in the crystals with increasing ytterbium concentration.
How should we refer to people attending sexual health services; patients, clients, users or customers?
Authors: Fitzpatrick Colin , Bedi Aman , Stewart Mary
Published: March 2020

Within the healthcare domain, commercial-sector terminology such as ‘client’, ‘customer’ and ‘user’ are replacing the previously acceptable collective noun, ‘patient’. Is the term we use important to the individuals accessing our services? A paper survey collected the responses of 581 individuals attending the service between August and October 2019. Overall, 372/496 (75%) (95% CI = 71.2–78.8%) unique responses reported a preference to the term ‘patient’, while only 92/496 (19%) (95% CI = 15.1–22.0%) preferred ‘client’, 23/496(5%) (95% CI = 2.8–6.5%) ‘customer’ and 9/496 (2%) (95% CI = 0.6–3.0%) ‘user’. In line with other published data, we acknowledge that people attending our service prefer to be referred to as ‘patient’ above all else.
Visualization of Fiber Moving in Air Tunnel with Velocity Gradient*
Authors: Miao Yang , Guo Xiang , Zhang Xiao-Jun
Published: March 2020

To measure the parameters of fiber and to visualize the reshaping process of fiber in air tunnel, an experimental approach is developed in the present work. The tunnel is designed with gradient flow velocity, and the fiber reshaping images as well as the fiber length value are obtained experimentally. An analytical expression of velocity distribution in the tunnel is theoretically derived and the simulated results are obtained. Automatic fiber reshaping including stretch and rotation is verified using the dynamical equation and the multi-spherical chain model. It is shown that pull force by air flow makes a chain of balls become straight and Stokes moment makes the ball chain rotate. Finally, reshaping criterion related with flow velocity is formulated.
Atomic Mixing Induced by Ion Irradiation of V/Cu Multilayers*
Authors: Sheng Yan-Bin , Zhang Hong-Peng , Shen Tie-Long , Wei Kong-Fang , Kang Long , Liu Rui , Zhang Tong-Min , Li Bing-Sheng
Published: March 2020

Bulk Cu/V multilayers simultaneously possess high strength and excellent radiation resistance thanks to their high density of interfaces. Irradiation-induced atomic mixing of Cu/V multilayers has been less investigated. Here, we investigate the ion irradiation of bulk Cu/V multilayers exposed to

H
2
+

or He+ ions at 350°C. The microstructure and elemental distribution are investigated by transmission electron microscopy and energy dispersive x-ray spectroscopy. Facetted bubbles and atomic mixing are observed after ion irradiation. The possible mechanisms of irradiation-induced atomic mixing are discussed.
Effect of Barrier Temperature on Photoelectric Properties of GaN-Based Yellow LEDs*
Authors: Zeng Jia-Ming , Wang Xiao-Lan , Mo Chun-Lan , Zheng Chang-Da , Zhang Jian-Li , Pan Shuan , Jiang Feng-Yi
Published: March 2020

The effect of growth temperature of barriers on photoelectric properties of GaN-based yellow light emitting diodes (LEDs) is investigated. It is found that as the barrier temperature increases, the crystal quality of multi-quantum wells (MQWs) and the quality of well/barrier interface are improved, and the quantum well is thermally annealed, so that the indium atoms in the quantum well migrate to the equilibrium position, reducing the phase separation of the quantum well and improving the crystal quality of quantum wells (QWs). However, the external quantum efficiency (EQE) of the samples begins to decrease when raising the barrier temperature even further. One explanation may be that the higher barrier temperature destroys the local state in the quantum well and reduces the well/barrier interface quality. Therefore, a suitable barrier temperature is proposed, contributing to the improvement of the luminous efficiency of the yellow LEDs.
Effect of Lattice Distortion on the Magnetic Tunnel Junctions Consisting of Periodic Grating Barrier and Half-Metallic Electrodes*
Authors: Fang He-Nan , Zhong Yuan-Yuan , Xiao Ming-Wen , Zang Xuan , Tao Zhi-Kuo
Published: March 2020

A spintronic theory is developed to study the effect of lattice distortion on the magnetic tunnel junctions (MTJs) consisting of single-crystal barrier and half-metallic electrodes. In the theory, the lattice distortion is described by strain, defect concentration and recovery temperature. All three parameters will modify the periodic scattering potential, and further alter the tunneling magnetoresistance (TMR). The theoretical results show that: (1) the TMR oscillates with all the three parameters; (2) the strain can change the TMR about 30%; (3) the defect concentration will strongly modify the periodic scattering potential, and further change the TMR about 50%; and (4) the recovery temperature has little effect on the periodic scattering potential, and only can change the TMR about 10%. The present work may provide a theoretical foundation to the application of lattice distortion for MTJs consisting of single-crystal barrier and half-metallic electrodes.
Fructose syrup production from Onggok with isomerization process by Mg/Al hydrotalcite catalyst and glucose isomerase enzyme
Authors: Permanasari A R , Fauzan A , Rachmalia N L , Elfanti R , Wibisono W
Published: March 2020

Onggok, solid waste of tapioca still contains high carbohydrate. This component can be converted to liquid sugar (glucose and fructose). Hydrolysis process convert carbohydrate become glucose syrup while isomerization process would change those glucose become fructose syrup. This study aims to produce fructose from Onggok with isomerization by Mg/Al hydrotalcite catalyst and compare the productivity 500ml Onggok substrate (10.32 percent DS) was hydrolyzed become glucose in liquefaction and saccharification process. Liquefaction took placed in 95 degree C, pH 6.5, for 1 hour, by adding 0.067 percent (v/v) α-amylase while the saccharification was start by adding 0.067 percent (v/v) glucoamylase at 60 degree C, pH 5, for 1 hour. Isomerization with Mg/Al hydrotalcite took placed in 50 ml hydrolysate sugar, 1 percent (b/v) catalyst, and 100 degree C while process with glucose isomerase was at 100 ml substrate, 60 degree C, pH 8.2, and same catalyst ratio (1 percent). Isomerization process for each catalyst would be hold in 3, 5, and 7 hours. The best result of isomerization productivity was 39.29 g/L. h for process with Mg/Al hydrotalcite catalyst, while isomerization yield was 6.18 percent for process with glucose isomerization enzyme.
Lipid extraction from Aphanothece sp. using ultrasounds
Authors: Abdilah F , Troskialina L
Published: March 2020

The unprecedented reduction in the availability of fossil fuels requires the research community to find safe, clean, renewable and sustainable energy sources. One promising source is microalgae biofuel, which can reduce environmental problems and energy crises due to its closed carbon cycle. Selecting the right strain and optimizing lipid productivity are very important for the success of the biodiesel conversion process economically. In this study, the lipid extraction process from Aphanothece sp. dry biomass which was previously grown in photobioreactor systems with atmospheric carbon dioxide feed inputs was carried out using the ultrasound method, with variations of solvent systems. The maximum lipid extract yield of about 40.79 ± 0.76 percent DW, w/w was obtained for the dichloromethane/methanol ratio of 1:2 (v/v).
The influence of K2CO3 to rice husk ratio for CO2 adsorption in fixed bed column
Authors: Elizabeth L , Heriyanto
Published: March 2020

Carbon dioxide emissions contributed by fossil fuel, have become a severe concern in relation to global warming and health issues. High content of CO2 will caused low content of heat value. This study is to reduce the concentration of CO2 gas by adsorption using K2CO3 rice husk. The method used is adsorption using a laboratory scale fixed bed column equipment at atmospheric condition and room temperature. The adsorption column was filled with K2CO3 and rice husk which composition (50: 8; 75: 8; 100: 8; 125: 8) grams, CO2 gas flowed from the bottom of the column which flow rate 9 liter per minutes (LPM). Then the sample was taken at the top of the column every 5 minutes. It showed that the highest adsorption capacity is 7.54 percent CO2 removal/gr adsorbent which amount of K2CO3 adsorbent 50 gr at 9 LPM CO2 inlet flow rate. It showed that most adsorbents have the most active sites to adsorb CO2. It also showed that K2CO3 50 gr have the longest breakthrough time than others amount of K2CO3.
Implementation of value engineering in design building for the construction of general hospitals in Jembrana Regency
Authors: Sudiarsa M , Suasira I W , Sudiasa I W
Published: March 2020

The choice of construction design is very important to do because it can show the quality of the building, and produce development at an efficient and optimal cost. One of them can be done by value engineering. According to Zimmerman and Hart in Hutabarat (1995) value engineering is a systematic approach to achieving the best functional balance between costs, reliability and appearance of a system or project. In this study, we tried to analyse the Construction of Negara General Hospitals in Jembrana Regency especially in structural work because it had a high probability of VE. This project consists of 3 floors which require a total cost of IDR 31, 965, 702, 000. In the creative stage this research uses alternative - the best alternative by changing the quality of existing concrete (K300) to concrete quality (K350) and Composite. From these stages, the best alternative is used in column, plate and beam reinforced concrete, namely alternative II composite or using WF Steel Column, floor deck plus Wire mesh can be chosen because it has the largest total value compared to other alternatives. While the cost savings is IDR 636, 761, 310.87 or 14.19 percent of existing.
GeomatikaDroid: An Android application for improving theodolite measurement
Authors: Sulistyo T , Achmad K , Respati S
Published: March 2020

In the era of the fourth industrial revolution, the implementation and integration of digital technology and physical processes are unavoidable in which teaching and learning geomatic are included. In the field, students generally make mistakes in calculation of horizontal distance and height difference that are caused by the error in staff reading or/and its recording. The general aim of this research is to develop geomatic application on android, so that it will be portable and easy to use in order to reduce the parallax and staff reading error in theodolite. In the design and development of GeomaticDroid Application, the Java and PHP programming languages were implemented and data were recorded in MySQL. Application testing and debugging were conducted using Android 7.0. In the field testing, GeomatikaDroid has shown consistencies in clarity, better legibility of staff reading and recording compared to conventional staff reading and recording method. GeomatikaDroid has maximum parallax error of 1 mm. Meanwhile, the measurement without GeomatikaDroid makes staff reading error of 18 mm. The z test of two independent samples proved that those two samples have significant differences in error.
Implementation of occupational health and safety (OHS) management system in The Villa Babakan Canggu Badung development project
Authors: Sutapa I N , Sutapa I K , Suasira I W
Published: March 2020

The general objective of the research is to find out the measured data of standard or SOP deviations with the implementation of OHS in the field and to find out the causes of the implementation of OHS as an influence on the number of occupational accidents that occur in construction projects. The research method uses descriptive and observational design, research data in the form of questionnaires as primary data and OHS plan reports as secondary data. As subjects in the study were 25 workers in the Villa Babakan Canggu building project. Based on the results of the analysis through the initial level internal audit with 64 criteria according to Government Regulation No. 50 of 2012 concerning the application of OHS, the assessment level of the application of OHS was 80.45 percent with the category of good application and the results of the quiz test stated that the workers agreed that the project implementers had prepared working conditions accordingly with OHS standard with a score of 1.75. Workers do their job with a natural work attitude with a score of 1.68.
Tri Hita Karana-based green environment building management model
Authors: Kristinayanti W S , Mas Pertiwi I G A I , Santiana M A , Aryawan I G M O
Published: March 2020

The development of tourism in Bali has a positive impact on improving people’s welfare and national economic development. This is followed by a negative impact on the environment in development activities, namely land use change and declining green land area, which in turn did not reflect sustainable development. Therefore, tourism development efforts must also be balanced with efforts to prevent negative impacts to maintain sustainability is and based on local cultural values. Green building environmental management is one aspect in the application of international standard, namely the Greenship issued by the Green Building Council Indonesia. The purpose of this study is to create green building environmental management model based on Tri Hita Karana, one of the local wisdoms of Balinese culture, consisting of Parahyangan, Pawongan and Palemahan. The study is conducted on several hotel buildings in Bali and using multiple linear regression tests. It shows that the application of environmental management aspects of green buildings had a significant effect of 75.3 percent on Palemahan, 20.2 percent on Pawongan and 5.1 percent on Parahyangan. The aspect of advanced waste management which is one of the aspects of environmental management of green buildings has the highest influence of 35.3 percent on Palemahan.
Implementation of ergonomic on parking management training increases parking user satisfaction in Renon Plaza Denpasar
Authors: Sutapa I K , Sudiarsa M , Sutapa I N
Published: March 2020

The indicators of park user satisfaction were in the form of a decrease in workload, a decrease muscle energy usage, increased ease of parking, increased parking convenience and increased parking productivity. An intervention basement used by parking arrangement-based motorcycle ergonomics. Measurements were made before and after repair. Washing out and adaption (WOA) each were conducted for 7 days consisting of one day WO and 6 days of adaptation. Data were analysed descriptively, tested for normality (shapirowilk) and homogeneity (Levene Test). Normally distributed data and is not homogeneous, different test with Friedman Test, different test between periods used the Wilcoxon test. Data were analysed with a significance level of 5 percent. The results showed that the parking space angle 600 a decrease in workload at 27.58 percent (p is less than 0.05), a decrease in muscle energy usage at 30.97 percent (p is less than 0.05), an increase in the ease of parking at 105.80 percent (p is less than 0.05), an increase in the parking convenience at 74.63 percent (p is less than 0.05) and an increase in parking productivity at 166.67 percent (p is less than 0.05).
Controlling hand robot using pattern recognition of finger movement
Authors: Risandriya S K , Pamungkas D S
Published: March 2020

The system enables to mimic the movement of the subject up to 87.5 percent accuracy. Electromyography (EMG) is one of the methods to control a robot’s hand. This paper discusses the utilization of the signal EMG with a neural network algorithm to activate the fingers of the robot hand. The statistical analysis, which is the root mean square method, is used to train the patterns of the motion of the fingers of the user. Moreover, to sense the user’s EMG signal, Myo armband is used. The results obtained reach 92.68 percent using 0.9 learning rate, 0.00001 error tolerance, one hidden layer with five nodes.
Preliminary study of building a low-carbon emission concept for Bali with nocturnal light analysis
Authors: Swardika I K , Santiary P A W , Suasnawa I W
Published: March 2020

Energy crisis and increase energy consume initiate depletion of natural resources and environmental degradation and that will leads to global warming and climate change. Nowadays, tourism considered being one of the important industries in the world. It also acknowledged as significant largest consumers of energy through many sectors including supporting facilities for tourists that focused on this paper. Bali’s most important tourist destination and become proponent of economic has many resorts surrounded by business trade support. Increasing electricity demand becomes present issues. This paper proposes a method to build community-based initiatives for reducing carbon emissions and saving energy. The method consists of procedural to build light threshold regulation. This research uses light-meter survey, a night-time satellite dataset, and other supporting data. The light threshold uses night-time satellite dataset. Classes of light thresholds are defined from histogram analysis. Results show a relationship of lux light-meter survey mean with night-time satellite dataset mean. From results created maps of class regions that show approximate of level energy used.
Design a microstrip antenna 2 elements for 900 MHz GSM system
Authors: Endri J , Ciksadan  , Setiawan I , Handayani A S , Taqwa A , Husni N F , Sitompul C R , Amin J M
Published: March 2020

Microstrip antenna design aims to increase the reach of cellular devices using the GSM system because there are still areas in Indonesia that have not been reached by this service. This antenna is made with an epoxy substrate material that have a dielectric constant (εr) = 4.4 and a thickness of 1.6 mm. This antenna uses a microstrip feed channel to send information signals from radiating components to cellular devices. in this antenna design a linear array method is used which has two elements to increase the gain possessed by the antenna. in this study antenna simulation using CST Studio suite software. the results of the simulation show that the antenna has a Return loss of -59.38 dB, has a VSWR of 1.06 and have a Circular radiation pattern. Circular radiation pattern shows that the antenna can receive signals from an angle of 0 to 360 degree and can be used by mobile devices to increase the range of the GSM signal.
Comparison of three phase induction motor start using DOL, Star Delta and VSD Altivar61
Authors: Sukarma I N , Ta I K , Sajayasa I M
Published: March 2020

In general, induction motors can be operated by connecting the motor directly to the supply circuit or by using a voltage that has been reduced to the motor during the start period. The obstacle of using a 3 phase induction motor is when starting, where the motor requires more current, which is about 5 to 7 times the nominal current, causing the voltage on the system to drop which can interfere with other equipment. In this study the researchers analysed the starting of a 3 phase induction motor using the direct on line system (DOL), star delta, and variable speed drive (VSD) both when the motor is free of charge and when the motor is loaded. Through this research can be seen the difference in the magnitude of current, voltage, power and THD. From the results of observations on the three types of 3 phase induction motor starting methods, it was shown that using a variable speed drive (VSD) altivar61 gave the largest decrease in current when compared to other systems.
Design of mini electric car with electric charging using solar cells
Authors: Hajar I , Yendra A
Published: March 2020

The reduced reserves of fuel oil encourage people to create machine with alternative energy sources, while the needs of vehicles are increasing, the development of electric vehicles is getting more intense. The problem is electric vehicles that have been developed still have weaknesses, for example, requiring a lot of batteries, no charging system, and the price is relatively expensive. The research objective is to design an electric vehicle charging system using a solar cell. The electric car battery charging system is designed using batteries and 60Wp solar cells as a voltage generator. The results showed that the highest voltage of solar cell 60wp on the first day was 12 am with a voltage of 19.02 V with light intensity of 104000 Lux, while on the second day at 12 am with a voltage of 18.81 V with a light intensity of 81000 Lux, and on day The third is at 2 pm with a voltage of 18.37 V with a light intensity of 62000 Lux. The conclusion of the research is not always high light intensity the output voltage is high. Battery charging time in measurement that is about 4 hours 16 minutes.
Application turmeric as antioxidant for broiler chickens
Authors: Candra A A , Putri D
Published: March 2020

The purpose of this study was to test the activity of turmeric as an antioxidant which is believed to be a traditional Indonesian medicine as an antioxidant therapy in broiler chickens. The study was carried out with a completely randomized design (CRD) using 100 broiler chickens distributed into 3 treatments with 5 replications and 5 each replicate. The treatments are control, commercial feed, ascorbic acid group (commercial feed and addition of ascorbic acid 60 mg per day) and turmeric group (commercial feed and addition of turmeric dose 500 mg per kg body weight. Data were analysed using variance analysis (ANOVA) and continued with Duncan’s multiple range analysis. The result shows that addition of ascorbic acid 60 mg per tail per day and turmeric 500 mg per kg was not able to increase the bodyweight gain of chicken with 30 days maintenance but were able to increase the composition of the meat in the chest and thighs and reduce the total cholesterol level of broilers.
Decision support system for the selection of rice varieties using weighted product method
Authors: Nurmahaludin  , Cahyono G R , Riadi J , Wardiah I
Published: March 2020

The selection of rice varieties is a problem because there are a number of criteria that are considered in decision making. The criteria used in this study for the selection of rice varieties are yield potential, average yield, age of harvest, resistance to brown plant hopper pest and resistance to bacterial leaf blight disease. The concept of decision support system is a model for selecting the type of variety desired based on determined criteria (attributes). In this study using the weighted product method because there are a number of criteria in decision making (Multi Attribute Decision Making). The weighted product method calculates the preference value of each alternative where the alternative chosen is the one that has the greatest relative preference value. Based on the test results using an application program created, the relative preference values of each superior rice variety are obtained. From the calculation of the largest preference value is INPARI 1 with a value of V equal to 0.0404.
Expert system on diagnosing children’s illness using Bayesian Method
Authors: Astawa I N G A , Hariyanti N K D , Sutawinaya I P
Published: March 2020

Expert system is a computer program that replicates the process of thinking and expert knowledge in solving a particular problem. The expert system can be implemented in wide range of areas, including in the medical field. Children are very susceptible to germs and parents often fear of not being able to detect symptoms of illness usually suffered by children. This expert application system for paediatric diagnosis is an expert system application designed to assist parents to sign in as users and enable them to diagnose the type of illness suffered by children according to the perceived symptoms based on a dynamic knowledge. This knowledge is obtained from various sources including scientific journals, the results of interviews and intensive discussions with medical experts. The knowledge base is structured systematically into a database with several tables including disease tables, symptom tables, and tables on basic rules to support system performance in drawing conclusions. The conclusion in this expert system is drawn using Bayesian Method. The assessment on 30 cases shows that the accuracy of system output is 76.3 percent and the system evaluation on users is 85 percent.
System design for business location searching using distance approach based on Android
Authors: Mansur  , Kasmawi  , Susilawati
Published: March 2020

Indonesia is large country with dense populations. Many entrepreneurs take Indonesia as world business target since people are commonly using a smart phone in their daily life. In Bengkalis, people are looking for business location conventionally by visit the shop and others. Social media like Facebook and Instagram also give the information about the shop and its products. But all the method was very inefficient since consumer spend a lot of energy, time, and money to buy something. Business and technology are two thing that can’t be separated where there are greatly needed to support the success of business. The distance location formula between two points P and Q with latitude and longitude (x1, y1) and (x2, y2) respectively named coordinate. This formula base on Haversine Formula which is very accurate to calculate the distance. In this paper, we create a system of business location searching using distance approach. The main purpose of this application is to give the visitors about the information of product and a map that show the nearest shop according to product they needed, distance estimation to reach the location.
Designing microservice architectures for scalability and reliability in e-commerce
Authors: Asrowardi I , Putra S D , Subyantoro E
Published: March 2020

The rapid growth of ICT is one of the challenges and opportunities in the field of purchasing, selling, and marketing goods and services are better known in the world of ICT as e-commerce. The need for e-commerce requires various strategies to increase revenue and customer satisfaction. E-commerce companies are required to share various services in increasing customer satisfaction. The problem that occurs is that e-commerce is demanded to have reusability services, automated service deployments, and fast service scalability. The best approach now is to use microservice to support current e-commerce needs. This paper discusses the design of a microservice on e-commerce services with the design science research methodology (DSRM) approach. The evaluation process was testing the performance, accessibility, best practices, search engine optimization. The results from the proof of concept microservice architecture for e-commerce already presented in this paper. Performance testing result shown the microservice architecture shows a better 30 percent and 4 percent compare with monolithic architecture for scripting and painting.
The 3D virtual drawing mobile application based on augmented reality using AR-Framework
Authors: Safrodin M , Zikky M , Ghozi S , Wicaksono M E
Published: March 2020

This study discussed the visualization system of 3D sketching model based on mobile Augmented Reality (AR) which supports information needed in real environment. The mobile application was made with adding virtual 3D objects to the 2D drawing by applying technology of AR. The visual system assists those who don’t have any specialized skill to be able to draw easily, because 3D model augmented over the drawing through camera of smart phone was added without any marker. This method is the basic combination between dynamic virtual object with the real environment, which nowadays has been developed as the mix reality. As the result on this research, the application can detect the real environment and mark it as a marker for the drawing-place as well. It will become the strategic future research of mix reality or marker less AR, because with this development, virtual world should be more attractive because it has been presented with immersive mixing to the real world.
Object recognition on patrol ship using image processing and convolutional neural network (CNN)
Authors: Julianto E , Khumaidi A , Priyonggo P , Rahmat M B , Sarena S , Adhitya R , Herijono B , Suharjito G , Munadhif I
Published: March 2020

Autonomous patrol vessels are state border patrol vessels equipped with cameras and image processing capabilities to detect objects around them. This prototype of ship can recognize a detected object; it used an image classification method called Convolutional Neural Network (CNN). So, it will minimize the occurrence of accidents on patrol boats. Input image in the form of RGB will experience feature extraction using a convolution layer. In the classification layer there is an artificial neural network with backpropagation to classify objects against a predetermined dataset. The detection value of the obtained vessel is operated by a predetermined actuator. In the final classification results the object recognition in the form of ships have a quite high accuracy. The average accuracy value is 96.59 percent with a sufficient light condition and RGB image input is taken in real-time.
Model development of flood control system for sluice
Authors: Sunu P W , Bangse K , Rasta I M , T Putra I D G A , Anakottapary D S , Santosa I D M C
Published: March 2020

Along with technological developments, the agricultural sector should also integrate it into agricultural systems. Problems with regulating water and monitoring the amount of water are often difficult and eventually lead to flooding. The aims of this research is to develop a model for a real time wireless flood control and monitoring system for sluice in “subak” area in Bali using the ultrasonic waves. This model development and integration is supported by the advance of electronics and information technology, have built a system which can automatically sense the water level at a sluice and then send these values to the control circuit through connecting cable. The ultrasonic module HC - SR04 is used as a distance sensor for detecting water level by measuring distance between sensor and water surfaces. This sensor placed above the sluice gate and gives electric input to the sluice drive electric motor. This model also equipped with LCD screen to displays the measurement data. Then depending on the measurements, the LCD screen show that the current status of water level in the sluice. The result of this research shows good agreement for the application of ultrasonic waves device for flood controlling and monitoring system for sluice.
Performance assessment on double pipe heat exchanger with longitudinal groove
Authors: Sunu P W , Darmawa I P , Sutarna I N , Suarta I M , Yasa K A , Suardana I P N , Jaya H S
Published: March 2020

Thermal performances were performed as preliminary research on double pipe heat exchanger with low number of longitudinal groove. The objective of this work is to determine optimal heat transfer parameter especially logarithmic temperature difference (LMTD) as a time series function. The thermal analysis in this paper also provide total number of heat absorb in the cold fluid. The rectangular-longitudinal grooves were incised on outer surface of tube side with number of longitudinal grooves of 2. The grooves high and width were kept constant at 0.3 mm and 1 mm respectively. The tube made of aluminium with outer diameter is 20 mm. The shell is made of acrylic which has 26 mm in internal diameter. Water is used as the working fluid with counter flow scheme. The volume flowrate of cold fluid was varied from 18x10^-5 m^ 3/s up to 25x10^-5 m^ 3/s which are equal to Reynold number (Re) around 31981 to 43610. The volume flowrate of hot fluid remains constant at 25x10^-5 m^ 3/s which is equal to (Re) around 30904. The LMTD of 2 grooves double pipe heat exchanger was better compared to that of the smooth one since the thermal sectional area are increased which essentially cause larger heat transfer.
Integration tillage mechanism on design of seed planter for small farming
Authors: T Putra I D G A , Suarta I M , Sugiartha N , Sugina I M , Suirya W
Published: March 2020

Seed metering devices with drive mechanically currently perform their function efficiently and are a good solution to the problem of Balinese farming. Seed planter was developed for small farming that has been mechanically driven with manual operation. Volume based control of seed utilized on drive shaft coupled wheel drive with ground contact for sowing seed on farmland. Tillage mechanism integrated on this seed planter and used gasoline motor for drive of rotary blade tiller. Tiller drive shaft have been rotated speed about 60-90 rpm by speed reducer of gearbox type. This design has tested their performance for sowing seed of sweat corn. Due to the individual volumes of metering roller systems each holding more than one seed, seed drills provide random seed distribution. A surveillance camera system for evaluating seed spacing uniformity and velocity of manual drive seed planter system is described. The sowing uniformity of seed drill as investigated was affected by the speed of the metering rollers. Coefficient of variation of seed spacing increased as speed of metering rollers by manual drive operation on farm field. Integration of tillage mechanism also reduced seed spacing accuracy of seed planter.
The analysis of cooling system working performance by using pure R 410a refrigerant with the results of R 410a recycle
Authors: Negara I P S , Arsawan I M
Published: March 2020

Cooling machines have a direct contribution to environmental damage including depletion of ozone layer and global warming caused by the leakage and discharge of synthetic refrigerants (HCFC and HFC) into environment. The discharge of refrigerant into the environment is 60 percent of service sector. Some obstacles found when making a model of a refrigerant waste treatment system since it could only be used for CFC (R-12)/R-134a refrigerants. This research aims at redesigning a machine made beforehand thus it can process various refrigerant wastes used in hospitality industries which involved several components such as compressors, oil separators, filters and distillers for recycling R410A refrigerants. By having this ability, all refrigerant waste can be recycled. Result shows that the redesigned machine can recycle refrigerant waste and the signal can be reused. Calculation results on COP cooling system using pure R 410A showed 4.5, whereas by using recycled R 410A refrigerant 4.3 was obtained. COP using recycled refrigerants was lower than the one using pure refrigerants due to contamination of dirt, oil and other elements. However, with COP value of 4.3 the system performance is still good, therefore the recycled R410A refrigerant can be reused.
The development of multi-racks clove dryer machine with control of temperature and Relative Air Humidity (RH)
Authors: Santosa I G , Wiryanta I K E H
Published: March 2020

Clove (Syzygium aromaticum, syn. Eugenia aromaticum) is one of the leading commodities in Bali. Before it can be processed into a product, cloves must go through a post-harvest process, namely the drying process to obtain a good quality clove. The purpose of this research was to make a multi-rack clove dryer by controlling temperature and relative air humidity (RH). The drying room is designed to have 3 trays with staggered arrangement to facilitate the circulation of hot air in the drying chamber. The hot air produce from a heater and the air flow will circulate using a fan. The temperature and RH sensors were installed in the drying chamber and connected to a control system that will cut off the flow of hot air from the radiator if the desired temperature and RH were reached. The results showed that the design of the drying machine that has been made can work properly. The hot air produce from the heater can circulate and the heat air on the staggered racks arrangement evenly distributed. The decreasing of clove mass per tray are about 40 percent after drying with the decreasing of clove’s water content about 44 percent.
The development of appropriate technology: Simple double layer vehicle safety system
Authors: Jauhari M F , Arsyad M M
Published: March 2020

The high crime rate of motor vehicle theft in urban areas requires additional safety systems installed in our vehicles. The following paper presents an embedded system for vehicle safety. A simple safety with double layer activation ensures the vehicle cannot be turned on by a burglar even though it has damaged the ignition. Utilizing a combination of the drive by touching module and the arduino uno microcontroller, the security system works automatically when the ignition is off. To activate the vehicle, it requires activation of the touch of the hand at a secret point, so that the CKP signal will be sent to the vehicle ECU. At the same time, touch activation continues the 7V voltage as a power microcontroller. Next it is necessary to pair the Bluetooth signal HC-05 module with the vehicle owner’s cellphone using the boarduino application. Commands from the cell phone in the form of signals received by the Bluetooth module, will be forwarded to the control unit to activate the actuator so that the vehicle can be turned on. The safety system that was proposed after being designed, built, and tested gave good results as expected.