bluuebunny/crossref_metadata_2025 huggingface dataset:
A Mobile App to Promote Alcohol and Drug SBIRT Skill Translation among Multi-Disciplinary Health Care Trainees: Results of a Randomized Controlled Trial
Authors: Curtis Alexa C. , Satre Derek D. , Sarovar Varada , Wamsley Maria , Ly Khanh , Satterfield Jason
Published: November 2019

Background

Adherence to clinical practice guidelines for alcohol and drug screening, brief intervention, and referral to treatment (SBIRT) is often inadequate. Mobile apps developed as clinical translation tools could improve the delivery of high fidelity SBIRT.

Methods

This study tested the effectiveness of an SBIRT mobile app conceptually aligned with the Theory of Planned Behavior (TPB) to support SBIRT delivery by health care trainees (nursing, social work, internal medicine, psychiatry, and psychology) working in clinical settings ( N = 101). Bivariate analyses examined the rate of SBIRT delivery between trainees assigned to the experimental (app) and control (no app) study conditions; as well as the relationship between TPB-based constructs, intention to deliver SBIRT, and screening rates.

Results

No significant differences were identified between the study conditions in SBIRT delivery. Significant correlations were found between intent to screen and TPB variables including attitudes/behavioral beliefs concerning substance use treatment ( r = .49, p = .01); confidence in clinical skills ( r = .36, p = .01); subjective norms ( r = .54, p = .01) and perceived behavioral control over appointment time constraints ( r = .42, p = .01). Also significant were correlations between percent of patients screened and confidence ( r = .24, p = .05); subjective norms ( r = .22, p = .05) and perceived behavioral control ( r = .28, p = .01).

Conclusions

The negative results of the study condition comparisons indicate the need for further investigation of strategies to optimize mobile app utilization, engagement, and effectiveness as a clinical translation tool. Findings of significant correlations between substance use screening rates and both norms and confidence support the potential value of the TPB model in explaining behavior of health care learners in SBIRT delivery.
Growth of term infants fed a commercial infant formula with a protein content of 2.2 g/100 kcal: an observational follow-up study
Authors: Jinno Shinji , Yamazaki Kae , Nakamura Yoshitaka , Kinouchi Toshi
Published: November 2019

To evaluate the suitability of the new nutritional composition of renewed commercial Formula A (protein reduced to 2.2 g/100 kcal, arachidonic acid increased to 13.2 mg/100 kcal, and docosahexaenoic acid maintained at 20 mg/100 kcal), we examined whether the growth of Formula A-fed infants was equivalent to that of breastfed infants. In this observational study, 1,053 infants were followed-up to 12 months. Growth, stool consistency, and the health condition of 99 infants fed with Formula A and 295 breastfed infants were compared. Body weight, body mass index, and head circumference of Formula A-fed infants were similar to those of breastfed infants. Additionally, there were no differences in the stool consistency and the health condition (infection and allergy prevalence) between the two groups. Formula A-fed infants grew as well as breastfed infants, suggesting the appropriate nutritional composition of Formula A. The findings may contribute to further improvements in infant formulas.
Determining the dynamics of cancer cell secretion
Authors: Short Ben
Published: November 2019

JGP study describes the spatiotemporal dynamics of proteins and lipids involved in the exocytosis of the matrix metalloproteinase MMP-9 from breast cancer cells.
Calibration of hygrometers at non-static conditions
Authors: Högström R , Salminen J , Heinonen M
Published: November 2019

The current practice of calibrating humidity sensors at discrete measurement points under static conditions is time-consuming, i.e. expensive, due to the long stabilization times. In order to reduce the calibration time, we introduce a new calibration method based on humidity ramp measurements, i.e. measurements are performed at first while humidity is increased with constant speed and then decreasing with the same speed. A calibration system based on the mixing flow humidity generation principle was developed for generating linear humidity ramps inside a measurement chamber. Two different calibration approaches were investigated. In the first one, high accuracy was targeted with moderate ramp speeds (2 h to 12 h) and a large volume measurement chamber using a chilled mirror hygrometer as a reference. In the second approach, a shorter calibration time was achieved with fast ramp speeds (0.5 h to 2 h) and a small volume chamber using a fast capacitive humidity sensor as a reference. The developed calibration procedure was validated by comparing results of non-static and static calibrations to each other for five different capacitive humidity sensors from two manufacturers. The non-static calibration was found to provide equivalent results compared to the static calibration with a potential of reducing the overall calibration time by up to 50%. Preconditions of the non-static calibration related to the ramp speed and sensors response times are discussed, and an estimation of the calibration uncertainty is given. The main advantage of the developed non-static calibration method is that calibrations can be performed faster and more data on the sensor behaviour is obtained than with the conventional point-wise calibration without any significant increase in uncertainty.
Estimation of squeezing in a nonlinear quadrature of a mechanical oscillator
Authors: Moore Darren W , Rakhubovsky Andrey A , Filip Radim
Published: November 2019

Processing quantum information on continuous variables requires a highly nonlinear element in order to attain universality. Noise reduction in processing such quantum information involves the use of a nonlinear phase state as a non-Gaussian ancilla. A necessary condition for a nonlinear phase state to implement a nonlinear phase gate is that noise in a selected nonlinear quadrature should decrease below the level of classical states. A reduction of the variance in this nonlinear quadrature below the ground state of the ancilla, a type of nonlinear squeezing, is the resource embedded in these non-Gaussian states and a figure of merit for nonlinear quantum processes. Quantum optomechanics with levitating nanoparticles trapped in nonlinear optical potentials is a promising candidate to achieve such resources in a flexible way. We provide a scheme for reconstructing this figure of merit, which we call nonlinear squeezing, in standard linear quantum optomechanics, analysing the effects of mechanical decoherence processes on the reconstruction and show that all mechanical states which exhibit reduced noise in this nonlinear quadrature are nonclassical.
Photonic zero-energy modes in a metal-based Lieb lattice
Authors: Chen Ying , Chen Huanyang
Published: November 2019

We design a photonic tight-binding system using the dispersive background, and observe the noncompact photonic zero-energy modes for both monopole and dipolar states in a finite Lieb lattice with flat truncations. In such a photonic Lieb system, the compact localization of s, p, and d flat bands is also checked. We show that this photonic zero-energy mode is provided by one dispersive band for singular touching, which has the same frequency with the flat band states. Specially, the zero-energy mode can be completely excited by merely one point source at the flat band frequency, covering all the minority sites and forming a noncompact state. This work may provide a deep understanding about the photonic zero-energy mode for higher order states in the Lieb or other flat band models.
Vocational Role as Supporting 21th Century Skill for Tourism Development in Igirmranak Village
Authors: Wahyu Noor Arifah Ika , Arifin Zainal
Published: November 2019

This study aims to examine the role needed to develop20th century skill as an existing support in the village of Igirmranak and also the development process in the future. This research is a type of literature study. The objectives of this study were the village head of Igirmranak and the Prau basecamp via Igirmranak. Data collection techniques using interviews, and library methods. The results of this study are knowledge and skills by people who need human resources who can continue to innovate, think creatively and critically. The era of industrial revolution 4.0 at the time of worshiping the community may be in terms of tourism development. The role of the parties is very much needed, providing training for citizens that continues to grow for the 20th century. In addition, collaboration can also be used for network and network needs. So, what will be pioneered and developed will not only follow the current trends, but will have special characters that are different from usual.
Developing a Lathe-Machining Module for the Grade XI Students of Machining Engineering Study Program At SMK N 2 Klaten
Authors: Setya Nugraha Afif , Paryanto
Published: November 2019

This study aimed to identify the stages or procedures in developing a lathe-machining module and examine the appropriateness level of the developed module. This was a Research and Development study employing the modified version of Thiagarajan’s 4D model, consisting of defining, designing, developing, and disseminating stages. This study was carried out in a state vocational high school SMK N 2 Klaten, particularly in Machining Engineering study program. The developed module proved appropriate based on the results of expert judgments and a user response test. Material expert I and II assessed the module in five aspects and gave a mean score of 3.53 and 3.56 respectively, indicating that the module was highly appropriate. A media expert validated the module in seven aspects and yielded a mean score of 3.74 (highly appropriate). Meanwhile, the user response test in two aspects resulted in a mean score of 3.41 (appropriate).
The Curriculum 2013 Implementation in Vocational High Schools in the Special Region of Yogyakarta
Authors: Wagiran  , Pardjono  , Purnomo Edy , Triwiyono Endri
Published: November 2019

Generally, vocational high schools in the Special Region of Yogyakarta have implemented Curriculum 2013in the learning process. This study aims at obtaining a depiction of the Curriculum 2013 implementation by conducting a survey on vocational high school teachers in the Yogyakarta province as the research sample. The data were collected through a variation of survey, documentation, and interviews; and analyzed descriptively. The findings suggest that the implementation of Curriculum 2013 in vocational high schools can be assessed in three components, namely the conformity between Curriculum 2013 and the vocational high schools, the curriculum implementation, as well as the motivation and support of the school. The first component reveals a high percentage with 82.53%, while the second and last components have relatively low and moderate percentage, with 75.63% and 78.80%, respectively.
Development of Industrial-Work Culture through Teaching Factory Program in Vocational Schools
Authors: Wulandari Iswayuni , Sudiyatno
Published: November 2019

This study aims to describe the industrial culture of SMK N 1 Kalasan. This research is an evaluation research with a gap model. The data collected came from State Vocational Schools in Sleman as reference schools, through interviews and observations, then analyzed descriptively. Indicators of industrial culture in the teaching factory are measured based on guidelines from teaching factory governance from the Directorate of Vocational Development, namely: management, team work, human resources, workshops, learning patterns, product-services, marketing production, and industrial and consumer relations. The results of this study indicate that these indicators show mostly as very good categories.
Competency Analysis The Field Of Expertise Of Automotive Engineering In Automotive Engineering Curriculum Of FT UNY
Authors: Suyanto Wardan , Budiman Agus , Fatah Amir , Efendi Yosep , Latif Isna , Hanif Hidayah Yunanto , Saputra Mifta
Published: November 2019

The study aimed to: (1) mapping the competencies of graduates in the field of Automotive Engineering Education Study Program of the FT UNY required by the TKRO of Vocational Expertise and the Automotive Industry, (2) Identify the competencies in the field of Automotive Engineering which occupied by graduates of the Automotive Engineering Education Study Program of the FT UNY in order to meet the needs of TKRO Vocational School and Automotive Industry, and (3) Determine the relevance of the competencies in the field of Automotive Engineering which is possessed by graduates of the Automotive Engineering Education Study program with the competencies required by TKRO Vocational and Automotive Industry. This research was descriptive research with a survey of senior teachers at the TKRO Vocational School and the vehicle service industry in the Special Region of Yogyakarta. Data collection techniques used questionnaire and interview methods by using the questionnaire instruments and interview guidelines. The data analysis technique used quantitative descriptive analysis in the form of percentages and qualitative descriptive analysis. Based on the responses the party of the Vocational School, the soft skill competencies of the highest order and most needed are knowledge, discipline, and honesty. The competencies possessed by graduates of the Automotive Engineering Education Study Program of FT-UNY from the highest to the lowest are discipline, honesty and interest. The graduates of PTO FT UNY are superior to the theoretical aspects than the practical aspect. Based on the response of the Automotive Industry, the soft skills needed by the industry from the highest to the lowest are honesty, discipline, and cooperation. The competencies possessed by graduates from the highest to the lowest are honesty, cooperation, and discipline. The material mastery of the graduates of the Automotive Engineering Education of FT UNY based on the theory and practice showed that the theoretical ability of the graduates of PTO FT UNY is better than practical abilities.
The implementation of the revised 2013 curriculum of cullinary at vocational school SMKN 4 Yogyakarta and SMKN 6 Yogyakarta
Authors: Marwanti  , Yuriani  , Auliana R
Published: November 2019

This study aims to describe the readiness of the teachers teaching the Culinary productive subjects in implementing the 2013 Curriculum at Vocational High Schools (VHSs) in Yogyakarta Municipality on the extent of 1) planning the learning process, 2) implementation of learning, 3) assessment of learning outcomes, and 4) identifying the obstacles the teachers deal with and the possible solutions taken in implementing the 2013 curriculum.

This is a descriptive research study conducted in February - June 2018 at vocational school SMKN 4 Yogyakarta and SMKN 6 Yogyakarta as the state VHSs implementing the 2013 Curriculum. The data were collected by means of observation, documentation, and questionnaire, and were analyzed by the descriptive statistics.

The results of the study show that the readiness of the teachers of Culinary subjects in implementing the 2013 Curriculum at VHSs in Yogyakarta municipality are described as follows. (1) the planning of the learning process, (2) implementation of learning, and (3) assessment of learning outcomes are in Good category. In addition, (4) it is found that the obstacles faced by the teachers of Culinary subjects include: (a) the lack of learning resources such as practical or productive coursebooks, (b) the lack of teaching hours so that they should take over those of other subjects to fulfill the target, (c) the number of administrative stuffs that teachers must prepare especially for the assessment aspects, and (d) the lack of available internet facilities, so that learning which requires the internet connection is constrained. Of the several constraints existing in the implementation of the 2013 Curriculum in Culinary at VHSs in Yogyakarta, the solution put forward is taking the hours of other subjects so that the needed hours for the practicum sessions can be fulfilled.
The Utilization Of Coconut Shell Waste As The Helmet Coating Materials For Motorcycle Riders
Authors: Sulistyo Bambang , Nugroho Rio , Prihantoro Rino
Published: November 2019

Coconut tree is a plant that can be easily found almost in every corner of Indonesian archipelago, therefore there are plentiful number of coconut produced here. Currently, the utilization of coconut shell waste is still limited to homemade furniture industries and crafts. It has not been made into technology product. The utilization of coconut shell waste as the helmet coating materials to be creative business product is an innovation in the form of helmet product making use of coconut shell waste. The second-hand helmet can be redesigned and recreated by making use the coconut shell waste as the outer coating. In other words, the ordinary or broken helmet can be transformed into a helmet which has unique, aesthetic and economical values. It is because coconut shell waste has a big potential to be made as a strong coating of motorcycle helmet that is more eco-friendly and is supporting the idea to utilize the waste into a valuable and sophisticated product. Accordingly, this research was conducted to make use the potential of coconut shell waste as unique, endurable, strong, and valuable helmet coating in order to answer the problem related to the large amount of coconut shell waste. This research found that coconut shell waste can be successfully turned into and used as helmet coating and in making a strong helmet from coconut shell waste, the thickness and weight of a coconut shell may have effect on the hardness level of the shell. The most effective hardness of coconut shell discovered in this research was 3.3 mm thick with 5 grams of weight.
E-learning implementation using user experience questionnaire
Authors: Pandu  , Fajar Ahmad Nurul
Published: November 2019

Online learning system or commonly called e-Learning which is commonly applied to the world of education, is now increasingly used in companies with diverse business fields. The concept of e-Learning is a transformation of conventional learning into digital form. The concept of e-Learning is now widely known and can be accepted in the community as evidenced by the many applications in the world of education and business. The aim to be achieved in this study is to implement e-Learning to PT MRK Diagnostics and find out whether or not there are inhibiting factors in implementing e-Learning to PT MRK Diagnostics. The method used to obtain recommendations after using e-Learning uses the User Experience Questionnaire (UEQ) method to find out the impression of using e-Learning that affects employee performance. Edmodo e-Learning has positive impression values in the Attractiveness (1,950), Perspicuity (2,100), Efficiency (1,775), Dependability (1,575), Stimulation (1,125), and Novelty (0.875) groups.
Clustering Steam User Behavior Data using K-Prototypes Algorithm
Authors: Ranti Kiefer Stefano , Salim Kelvin , Girsang Abba Suganda
Published: November 2019

The use of user telemetry to gather player behavioral data on video games can be very beneficial to game developers with a certain business model. With the help of user telemetry in game development, it can provide access to data on user behavior from installed game clients platform such as Steam. These behavioral data can be used to find out the Steam user behavioral patterns on playtime distributions that can be studied by developers in order to have a deeper understanding of the behaviors of their players. In this study, the data are clustered using the k-prototypes algorithm, a combination of k-means and k-modes algorithm that can be used to cluster mixed attributes. The result shows that the clusters represent the types and preferences of the players.
Design and implementation of obstacles detection in self-driving car prototype
Authors: Sari R P , Wibawa I P D , Ekaputri C
Published: November 2019

Technology progresses very rapidly that makes a variety of industries vying to produce new innovations, especially the automotive industry. One example of innovation in the automotive industry is a self-driving car that can drive itself. Therefore, a self-driving car prototype is needed. This research focuses on the obstacles detection and calculation of obstacle distance. The obstacle detection uses a webcam with digital image processing. Obstacles which are detected are quiescent blue object that blocks the path of a self-driving car prototype and red light of traffic lights. The results of this research have a success rate at distance from webcam to object with actual distances of 38,3 cm and 55 cm amounting to 85,9% and 92,83%, the success rate at distance from webcam to blue obstacle with actual distances of 37,8 cm and 44,5 cm are 91,865% and 97,744%, the test results of red HSV value have accuracy 80%, precision 76,47%, and recall amounting to 86,667%, and the test results of blue HSV value have accuracy 83,33%, precision 81,25%, and recall 86,667%.
K-Nearest Neighbor for colon cancer identification
Authors: Caecar Pratiwi Nor Kumalasari , Magdalena Rita , Fuadah Yunendah Nur , Saidah Sofia
Published: November 2019

Colon cancer or colorectal cancer is a type of cancer that attacks the last part of the human digestive system. Lymphoma and carcinoma are types of cancer that attack humans colon. Colon cancer causes deaths about half a million people every year. In Indonesia, colon cancer is the third largest cancer case for women and second in men. Unhealthy lifestyles such as minimum consumption of fiber, rarely exercising and lack of awareness for early detection are factors that cause high cases of colon cancer. The aim of this study is to produce a system that can detect and classify images into type of colon cancer lymphoma, carcinoma, or normal. The designed system used 198 data colon cancer tissue pathology, consist of 66 images for Lymphoma cancer, 66 images for carcinoma cancer and 66 for normal/healthy colon condition. This system will classify colon cancer starts from image preprocessing, feature extraction using Principal Component Analysis (PCA) and classification using K-Nearest Neighbor (K-NN) method. Several stages in preprocessing are resized, convert RGB image to grayscale, edge detection, and last histogram equalization. Tests will be done by trying some K-NN input parameter settings. The result of this study is an image processing system that can detect and classify type of colon cancer with high accuracy and low computation time.
Spatial data gathering architecture for precision farming using web services
Authors: Fibriani C , Ashari A , Riasetiawan M
Published: November 2019

Precision Farming (PF) is an agricultural business with an approach that enables careful treatment using several technologies to support it. The concept of PF can be used in all aspects of the crop production cycle from soil testing to harvesting. Soil Testing is a phase to test the conditions of the suitability of the soil to certain varieties. The land suitability variables used are soil type, slope, and altitude. However, the data was stored on other sources with different platforms and web service is the answer to this issue. This paper will approach the Soil Testing phase using the type of spatial data that can be used as a variable in determining land suitability for particular vegetation, which is using web service technology to collect the data. Using the overlay method combine the spatial, that is collected using Geographic Information System (GIS) web services, to produce a land suitable map for soil testing phrase. Land mapping can be used for decision-making processes related to the vegetation suitability. Spatial data gathering architecture for precision farming using web services, in this case, which is soil testing phrase, is the result of this paper.
A numerical study of Poisson equations: steady heat distribution with one-point source
Authors: Solekhudin Imam
Published: November 2019

In this paper, Poisson equations are considered. Especially, equations which governed problems involving steady heat distribution with a point source. The heat distribution problems studied are over thin plates. Generally, these problems may not be solved analytically. Hence, a numerical method called Dual Reciprocity Method (DRM) is employed to solve the problems. Using this method, some of the numerical results are presented and discussed to investigate the influence of source positions to heat distribution over thin plates.
Post-stroke rehabilitation robot for knee: a compact design and manufacture
Authors: Herianto  , Febryantho Ilham Adityarsena , Mastrisiswadi Hasan
Published: November 2019

The number of stroke patients is increasing every year. Many studies have been carried out to rehabilitate post-stroke patients; one of them is using robotic assistance. However, rehabilitation robots, especially for lower limbs, are usually large, so they are less active. This study aims to design and manufacture compact lower limb rehabilitation robots, which focus on the knee so that the rehabilitation process can run effectively. After being designed and manufactured, the rehabilitation robot is also tested whether it can run well. Based on measurements between the motion sensor and the actual movement, there is almost no difference in distance. Besides, from the graph of position, speed, and acceleration, the rehabilitation robot runs well.
SWOT analysis and strategy formulation for cocoa small and medium enterprise development in Nglanggeran area, Gunung Kidul regency-Indonesia: the case of Taman Teknologi Pertanian
Authors: Fauzi A A , Falah M A F , Suwondo E
Published: November 2019

Cocoa is one of the potential agricultural resources in Indonesia but still lacks the attention of stakeholders to get the best economic value. It is important to encourage the cocoa business industry to capture opportunities in the cocoa processing business in the future. Taman Teknologi Pertanian in Nglanggeran is an SME that is also a business incubator that has produced various chocolate products. The design used in this research was explanatory research with the process of data collection through interviews, observation, and questionnaires. This analysis consists of two steps of weighting and prioritizing. The weighted score of the IFE and EFE matrix is (2.5671; 3.1132). SWOT diagram is used to determine the current position of the company which is on the second quadrant (1.1895;-0.0460) which refers to the S-T strategy. The chosen strategy triggered to do diversification strategy as doing product innovation gradually according to consumer needs. Concentric diversification for internal can be done by utilizing cocoa peel waste as scrubs, whereas, concentric diversification for external can be done by developing agro-tourism. These strategies support sustainability in the area.
Switching over technique to fault tolerant function of DC-bus battery in dual inverter motor drive
Authors: Oto Yoshiaki , Fauziah Melinda Badriatul , Noguchi Toshihiko
Published: November 2019

The dual inverter motor drive feeding an open-end winding PM motor is focused on for mileage improvement and autopilot technologies of hybrid and electric vehicles. Autopilot operation requires the fault tolerant functions which achieve to keep controlling the motor, even if some failure occurs in the system. In this paper, the fault tolerant function of the DC-bus battery in the dual inverter motor drive system is discussed. The system has a battery and a capacitor across the DC-bus of each inverter. The capacitor is utilized to keep operating the motor, instead of the failed battery in the fault tolerant function. In this time, however, it is necessarily to control the capacitor voltage of the failed side inverter at constantly with the space vector modulation (SVM). In particular, it is required to regulate the capacitor voltage of the failed inverter at a half of the battery voltage of the normal condition inverter. Therefore, the capacitor voltage must be discharged immediately after some failure is occurred in the battery of one of the inverters. In this paper, the switching over techniques from the normal condition to the fault tolerant function is proposed, and the proposed technique is examined through several computer simulations.
Estimating the state of charge on lead acid battery using the open circuit voltage method
Authors: Al Hadi A. Muh. Rifqa , Ekaputri Cahyantari , Reza Muhamad
Published: November 2019

This research investigates one of the methods to estimate the State of Charge (SoC) of a lead-acid battery with an Open Circuit Voltage (OCV) method. Determining the battery voltage in open circuit condition with standard temperature (25oC). Observing the OCV of the battery on the discharging cycle then compare with the increasing and decreasing of the battery voltage in open circuit condition (OCV) that can show the SoC battery to determine the capacity of the battery. Then using the Coulomb Counting method to compare the estimated SoC by OCV method. The result shows that there is a different value measured by these two methods at the early and later stages during the discharge cycle of a lead-acid battery.
Detection of satellite data-based flood-prone areas using logistic regression in the central part of Java Island
Authors: Pratidina G , Suroso  , Santoso P B
Published: November 2019

The history of natural disasters recorded in BNPB (2019) explains that the total number of natural disaster events in the central part of Java (Central Java Province and Special Region of Yogyakarta Province) ranks highest in terms of the number of frequency of occurrences nationally. Of the total natural disasters that have occurred in Central Java, the number of floods is ranked third after the landslide and tornado disaster, which is around 1500 disasters. Various factors that can cause flooding cannot be eliminated. However, what is more, necessary is how to control the impacts caused by floods so that they can be managed and monitored appropriately. One effort to overcome the problem of the threat of flooding is to develop a detection model for flood-prone areas. In this study, the detection of flood-prone areas was carried out by using a logistic regression method that takes into account the variables that cause flooding such as elevation, land slope, river distance, flow accumulation, rainfall, and runoff coefficients. The results of the modelling, obtained coefficients of the variables/parameters mentioned earlier, namely intercept (5.05766 – 16.13210), rainfall (-0.01547 – 0.04075), elevation (-0.02173 – -0.00592), slope (-0.28108 – -0.01940), runoff coefficient (-9.10476 – 7.15039), river distance (0.00038 – 0.00783), and flow accumulation (-9.26342E-06 – 0.00309). The level of success in this modelling testing was 93.47826% -98.26087% of 329 flood event data points and not floods.
Brownian Dynamics Simulation of Colloidal Gels as Matrix for Controlled Release Application
Authors: Meidia Hira , Irfachsyad Danial , Gunawan Dennis
Published: November 2019

The form of crystallization colloidal gels is important as matrix for controlled release application. In this work, we use the Brownian Dynamics simulation to study the formation of gels by varying the inverse Debye length. We choose a fixed volume fraction, ϕ = 0.1 and a fixed quenched temperature at room temperature, while the inverse Debye length, κ, is varied. To ensures that the simulations cover the fluid-phase region down to the unstable phase region above the critical coagulation concentration, the inverse Debye length is varied between κ = 120σ−1 to 250σ−1. It shows that at the inverse Debye length κ = 250σ−1 the gel forms by colloidal particles that can support the active ingredient by forming long range network.
Sensitivity of Localized Surface Plasmon Resonance (LSPR) Au Nanorod with Methylene Blue Medium Using Boundary Element Method Simulation
Authors: Sofani Miyah , Kuddah Muhammad Sujak Mansur , Putra Miftahussur Hamidi , Djuhana Dede
Published: November 2019

We have calculated the sensitivity of gold nanorod (AuNR) in water solution and methylene-blue based on boundary element method with varying diameter of the nanorod, D are 20 nm, 40 nm, 60nm, and 80 nm. The aspect ratio was varied from 1.5 to 3.5 according to diameter. The dielectric function of AuNR based on Christy and Johnson experiment. To understand the sensitivity sense, we have also varied the medium refractive index is n = 1.3334 (100% water pure) and n = 1.347 (100% methylene-blue pure). The sensitivity of LSPR Au nanorod was determined by the gradient of the peak of wavelength to the refractive index medium variation for all aspect ratio. The LSPR of AuNR consisted of a longitudinal and transversal mode. The longitudinal mode appeared higher wavelength than the transversal mode in LSPR spectra and the peak of wavelength increased as the aspect ratio increased while in transversal mode the peak of wavelength relatively was constant. Furthermore, the sensitivity in longitudinal mode increased as the aspect ratio increased whereas the sensitivity in transversal decreased as the aspect ratio increased. Increasing the sensitivity in longitudinal mode related to red-shift as the nanorod volume increased and the refractive medium index change.
Effect of FeV Residual Powders as an Innovation of Thermo Reactive Deposition Process (TRD) with Material Balance Method to Carbide Surface Characteristics on SUJ2 Tool Steel
Authors: Fawazul Reza , Mochtar Myrna Ariati
Published: November 2019

Thermal Reactive Deposition (TRD) using pack cementation method with vanadium as carbide former has been examined to form the carbide layer on SUJ2 tool steel. In this study, effect of addition recycled FeV powder to new FeV powder to the product quality. Calculation analysis resulted 4 variations of FeV powder ratio to be studied i.e. 100% new FeV powder; 100% residual FeV powder; new powder FeV : residual FeV powder 50%:50%; New FeV powder : residual FeV powder 25%:75%. Electron microscope (SEM) and optical microscope (OM) analysis showed that the carbide layer formed in each sample had the same relative layer thickness of about 18μ. X-ray diffraction (XRD) characterized showing that there were a vanadium carbide compound in the formed layer. Hardness test and wear test resulted a relatively similar hardness value of about 1800 HV and 3×10−5 mm3/m. It can be concluded that the use of residual FeV powder to the new FeV powder can be applied because the test results with various ratios that have been done have relatively similar results and meet the hardness application specification of 1700 HV.
Preliminary study on the use of rice husk as a reducing agent in iron sand reduction
Authors: Ghiyats Muhammad Faris , Maksum Ahmad , Soedarsono Johny Wahyuadi
Published: November 2019

Titanium is a valuable mineral that has many advanced functions in our daily lives. This has caused the demand for this mineral to increase over the years. Researchers have long studied the use of reduction methods using coal in increasing titanium content in iron sand before further processing. Considering the sulfur content in coal which causes various excess problems in the reduction process, then in this experimental study we tried to examine the potential of rice husk as a reduction agent in the iron sand reduction process. This study includes several stages, namely roasting and reduction processes with or without the addition of Na2SO4, and magnetic separation. The weight ratio of iron sand and rice husk used in this study was 10: 1, while the reduction process was carried out at a temperature of 700°C for 60 minutes, followed by the magnetic separation process. Characterization of samples was carried out using XRD and ICP-MS. And the final results obtained after magnetic separation showed that the Ti content in the product tail was higher than the Ti content in the concentrate, which was 0.692% and 0.221% respectively.
Characteristics of Uranium Dioxide (UO2) Kernel Produced by Sintering Process using Modified Sintering Reactor
Authors: Setyadji Moch , Fitrotun Aliyah
Published: November 2019

Sintering process is the final stage of fuel kernel manufacturing prior to the coating process. This stage is very important part of the whole process, because it will determine the feasibility of UO2 kernel to comply with the specifications of HTR reactor fuel. The objective of this research was to obtain UO2 kernel with the density of ≥ 95% TD. The results showed that the highest density reached 92.56% TD or about 10.1441 g/cm3. This condition of sintering was gained at the temperature of 1400 °C with sintering time of 2 hours. The sintering product diameter gained was around 919 μm the specific surface area 4.4213 m2/g, and a total pore volume 4,751 x 10−3 cm3/g. The density of UO2 kernel produced from this research is the best compared to previous finding because of its density already approaches the HTR fuel specification requirements.
Shape Memory Thermoplastic Natural Rubber for Forensic Applications
Authors: Sengsuk Theerarat , Intom Sililak , Songtipya Ladawan , Johns Jobish , Chawengsaksopak Krisadakon , Kalkornsurapranee Ekwipoo
Published: November 2019

Shape memory thermoplastic natural rubber was successfully developed in our laboratory. The main aim of this work is to obtain the suitable recipe and condition for fabrication of shape memory polymers (SMPs) based thermoplastic natural rubber (TPNR). It can be easily used as 3D imprint material for forensic application. The effect of blending ratio of thermoplastic (TP) and natural rubber (NR) on the mechanical and shape memory properties has been investigated. It was found that the mechanical properties show a decreasing trend with increasing of NR content while the shape fixity (≥ 70%) and recovery efficiency (≥ 60%) increased when adding NR in the blends. In addition, the prepared SMPs based TPNR in this work was also compared with commercially available forensic grade silicone. The resulting material provided better performances in terms of mechanical properties and shelf life. Low cost and ease of processing are the advantages and benefits of this system.
Corrosion Resistance of 316L Biomaterial in Simulated Body Fluid by Modification of Shot Distance and Shot Angle of Shot Peening
Authors: Kondi Maliwemu Erich Umbu , Malau Viktor , Tri Iswanto Priyo
Published: November 2019

Corrosion resistance of 316L biomaterial can be improved by mechanical surface treatment such as shot peening. Shot peening can create plastic deformation as a nanocrystal surface layer on the metal surface to protect the material from corrosion attack. This study aims to investigate the effect of shot peening on the corrosion resistance of 316L to reach the best rate of corrosion. The shot peening parameters in this research are shot distance (6, 8, 10, and 12 cm), shot angle (30, 60, and 90°), compressor pressure (7 kg/cm2), shot duration (20 minutes), and steel balls S-170 (diameter of 0.6 mm). Simulated Body Fluid (SBF) was used as a corrosion media with ion concentrations nearly equal to human blood plasma. Corrosion tests were used versaSTAT, and the data were analyzed by VersaStudio. The result shows that the shot peening can decrease the corrosion rate of the 316L biomaterial. The larger the shot angle, the lower the corrosion rate and the nearer the shot distance, the lower the corrosion rate. The nearest shot distance (6 cm) and the largest shot angle (90°) give the best result to decrease the corrosion rate from 0.8617 mpy to 0.1096 mpy.
Effect of Activated Carbon Addition on Electrochemical Performance of Li4Ti5O12/Nano Si Composite as Anode Material for LiB
Authors: Annisa N , Orlando I , Faizah  , Syahrial A Z
Published: November 2019

Lithium titanate (Li4Ti5O12/LTO) is one of the materials being developed as an anode in Li-ion battery. LTO has zero-strain properties that do not volume change during charge and discharge, does not cause SEI, and can be used for the high rate. However, LTO has a weakness such as low electrical conductivity of 10−13 S/cm and low capacity of 175 mAh/g. Therefore, it needs to be combined with high-capacity materials such as silicon and materials that have high electrical conductivity such as carbon. In this study, the LTO-C/nano-Si composite was made to obtain an anode with high capacity and electrical conductivity. Carbon is added with a variation of 1, 3, and 5 wt% during the sol-gel process, while nano-Si is added by 10 wt% of the total active material ingredient in the slurry making. The carbon added is activated carbon which has previously been activated by using NaOH. Activated carbon is characterized by BET and SEM, while LTO-C/nano-Si composite was characterized by XRD and SEM. For the battery electrochemical performance, EIS, CV, and CD tests are performed. Activated carbon has a surface area of 490,007 m2/g. In this study, the optimum result achieved by the addition of 3% activated carbon (LTO-3%C/nano-Si) with 182.87 Ω resistivity and 17.14 mAh/g discharge capacity at 20C.
Synthesis of Li4Ti5O12 (LTO) by Sol-Gel Method for Lithium Ion Battery Anode
Authors: Purwamargapratala Yustinus , Sujatno Agus , Sabayu Yohanes Lugas , Kartini Evvy
Published: November 2019

Li4Ti5O12 (LTO) is one of the material that has the potential as anode in lithium ion battery that is safe to use and has a long life cycle. In this research, LTO was synthesed by sol-gel method using oxalic acid as chelating material, it is expected to produce materials with smaller particles and homogeneous distribution. The LTO sol-gel compared to commercial LTO. Characterization was carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS). The measurement of LTO battery performance is carried out by charge discharge and electron impedance spectroscopy. The sol-gel LTO has a purity of 99%, which is higher than 57% commercial LTO. The average particle size is 1 μm, and the conductivity is 7.6x10−7 S.cm−1. While commercial LTO has a purity of 57%, the average particle size is 30 μm and conductivity is 7.4x10−7 S.cm−1. Batteries with synthesized LTO anodes have a capacity of 25.9% higher in the first cycle and 110% higher in fifth cycles incomparison with batteries used commercial LTO anodes.
Implant materials for knee and hip joint replacement: A review from the tribological perspective
Authors: Hussain Omar , Saleem Shahid , Ahmad Babar
Published: November 2019

The hip and knee joints work under boundary/mixed lubrication during sleep and rest which causes starved lubrication by the natural lubricant synovial fluid and with the passage of time leads to arthritis resulting from the wear of joints due to starved lubrication. The excessive wear leads to loosening of joint needing total joint replacement. The current materials used in total knee replacement and total hip replacement are presented in this paper. Biomedical implants are gaining increasing attention nowadays to improve the working lifespan of joint replacements like hip and knee. Researchers are focussing on developing biocompatible materials with improved wear resistance for joint replacements. Various biocompatible metals and polymers have been used for knee & hip joints which are discussed in this paper. The investigations on self-lubricating biocompatible coatings on metals and alloys are the current focus of research. In this paper, a broad review of the materials used for total joint prosthetics is presented and the current trends of the joint replacement technology are discussed besides highlighting the various issues and challenges.
Enhancement of Micro cantilever’s Rectangular and Triangular Beam for Improvising the Sensitivity of Biosensor – a Comparative Study
Authors: Urekabharathi S , Padmasine K G
Published: November 2019

Micro-Electro-Mechanical Systems (MEMS) is the mixing of factors like mechanical, sensors, actuators, and electronics on a common substrate through the consumption of micro-fabrication era or micro-technology. A type of beam is called “cantilever” which provides assistance at only one end. This work affords to have a look on MEMS based entirely micro cantilever beama which are employed in medical software systems and are a component to slicing region reasonably evolved sensors. The beams of the Cantilever are the most omnipresent systems within the area of micro-electromechanical structures (MEMS). MEMS cantilevers are normally made from silicon (Si), silicon nitride (Si3N4), or poly-silicon. A procedure on growth in deflection of micro cantilever beam is essential for enhancing the sensitivity of biosensor. The sensitivity level of a microcantilever biosensor relies upon on its deflection that occurs because of the antigen-antibody interplay. The deflection can be elevated by way of growing the length or lowering the thickness of micro cantilever beam but it’ll minimize the reverberating frequency of the beam. This minimizes the resonant frequency and that makes the cantilever vulnerable to thermal noise and low frequency vibrations which immediately affect the size of deflection. In this method, the rectangular and triangular shapes are taken into consideration and the comparative evaluation is established. The outcomes display that the deflection of triangular beam is two times extra than rectangle fashioned beam.
Incremental effect of saccharum officinarum addition on strength characteristics of geopolymer composite specimens
Authors: Dar A R
Published: November 2019

This paper reports the development of geopolymer concrete by adopting saccharum officinarum molasses and naphthalene sulphonate formaldehyde as admixtures. The behavioural effect of these admixtures on geopolymer is investigated. In the first stage, geopolymer concrete based on ordinary fly ash was prepared. In the second stage, by varying the percentages of cement (0 to 8%) with equal percentages of admixtures, three more geopolymer concrete mixes were prepared. Fresh and hardened properties of geopolymer concrete specimens were obtained by performing different tests. In addition, the concrete specimens were tested for ultrasonic pulse velocity, drying shrinkage and standard consistency. The findings of this study concluded that: the incremental addition of saccharum officinarum molasses improved the workability, boosted the durability and also enhanced the strength of geopolymer concrete. Further with the addition of cement in the range of 4 to 8% at a constant admixture content of 1.2%, strength and durability of geo-polymer concrete improved.
System Identification of Magnetorheological Damper for Various Configurations
Authors: Daniel C , Hemalatha G , Paul Sathiyan S , Betsya G , Sarala L , Tensing D , Sundar Manoharan S
Published: November 2019

A symmetrical Bouc Wen hysteretic model has been proposed for different configuration of MR damper in this paper. The various configurations of the MR damper include varying the annular gap between the cylinder and the piston, the amount of carbonyl iron particles present in the carrier fluid and varying the current. The symmetrical Bouc Wen model is simulated using the MATLAB software and the experimental and simulated force, displacement values are compared, and the maximum damping force is found among the various parameters considered. It is found that the maximum damping force was obtained for 1mm annular gap and a fluid configuration of 80% carbonyl iron particles when excited at a frequency of 0.5Hz with 2.5A power supply.
The Complementary Membership Function of n-Trapezoidal Shape Fuzzy Numbers
Authors: Pandian Selvam , Arthur Rajkumar , Easwari Janakaran Sudha
Published: November 2019

Fuzzy numbers are based on membership function such as the trapezoidal shape of the trapezoidal fuzzy number have one interval with two uncertain intervals. A crisp value of trapezoidal fuzzy number is not sufficient when uncertainty arises in more than four intervals such as the hexagonal, octagonal, decagonal, dodecagonal, etc., In this paper we take Dubois Prade left and right reference function with distributive function and complementary function respectively and find the generalization of the membership function of n-trapezoidal shapes uncertain numbers in a very simple way. Also illustrated with few examples also.