Sultan Ageng Tirtayasa University
Serang, Indonesia

Sultan Ageng Tirtayasa University is the only state university in the province of Banten, Indonesia. The main campus is in Serang and the faculty of engineering is at Cilegon. Sultan Ageng Tirtayasa University was established by the Tirtayasa Foundation.Untirta has six faculties: Law, Teacher Training and Education , Engineering, Agriculture, Economics, and Social and Political Science.Sultan Ageng Tirtayasa University is the youngest in Indonesia, which is located in the province of Banten. Wikipedia.

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Suherman,Sultan Ageng Tirtayasa University | Wibowo F.C.,Sultan Ageng Tirtayasa University
Advanced Science Letters | Year: 2017

The aim of this study is to Development an integrated skills, humanist, mental (SHM) for professional teacher preparation programmer. The average teacher in Indonesia when asked whether it is professional, surely the answer is already a professional. However, in reality in Indonesia they are a competent teacher who asked but when seen from the results of teacher evaluation in the low category. So that model proposed SHM Model articulated, in broad terms, the Skills, Humanist, and Mental components for beginning teachers’, with the underlying core values permeating the programmer. The method of study uses one group experiment for development as well as the characteristic of SHM and total samples of research is 50 teachers. The result is model of SHM significant for development of professionalism teachers. © 2017 American Scientific Publishers All rights reserved.

Ni Ketut C.,Sultan Ageng Tirtayasa University | Dwinanto,Sultan Ageng Tirtayasa University | Attegar,Sultan Ageng Tirtayasa University
MATEC Web of Conferences | Year: 2017

Cyclone separator is an equipment that separates particles contained in the fluid without using filters. The dust particles in the flue gases can be separated by utilizing centrifugal forces and different densities of particles, so that the exhaust gases to be cleaner before discharged into the environment. In this paper carried out a simulation by Computational of Fluids Dynamics to determine the number of particles that can be separated in several cyclone separator which has a ratio body diameter against vortex finder high varied as: 1:0.5; 1:0.75; 1:1; 1:1.25 and 1:1.5. Fluid inlet are air with antrachite impurity particles that are commonly found in the exhaust gases from tire manufacturers with inlet velocities varied as: 15 m/s and 30 m/s. The results of simulation show the fluids with 15 m/s of inlet velocity is generate particle separation value is higher than the fluids with 30 m/s inlet velocity for ratio of body diameter and height vortex finder a: 1:0.5 and 1:1.5. For both of inlet velocities the best ratio of body diameter and height vortex finder is 1:1.25, where it has the highest values of percentage trapped particles about 86% for 30 m/s input velocity and also for 15 m/s input velocity. © The Authors, published by EDP Sciences, 2017.

Zulaida Y.M.,Sultan Ageng Tirtayasa University | Afrizal R.,Sultan Ageng Tirtayasa University | Suryana S.,Sultan Ageng Tirtayasa University
MATEC Web of Conferences | Year: 2017

Macrosegregation is a defect that difficult to avoid in a metal alloy made by casting method. Macrosegregation can cause decreasing in mechanical properties of casting products. It will reduce their performance in industrial application. Macrosegregation is convinced occur during solidification time in liquid alloy. In the early solidified, The solids move upward/downward in liquid alloy during solidification are considered to contribute on macrosegregation formation. This movement occur due to the density differences between the solid and the surrounding liquid. This research want to observe the effect of stirring on macrosegregation formation for interfering on the movement of initial solidified solid. Stiring with rotation method is applied in this experiment at certain temperature. The temperature and the rotation speed of stirring are varied to observe the effect of rotation stirring on macrosegregation formation. The mold is covered by insulation jacket and kept the bottom part opened in order to obtain the directionally solidification. The result shows that the rotation stirring can change the macrostructure of casting but in case of composition distribution, the macrosegregation still appear. Increasing the rotation stirring will rise solid crystals up and the macrosegregation become more uniform and the treatment is better if conducting at lower temperature. © The Authors, published by EDP Sciences, 2017.

Alfirano,Sultan Ageng Tirtayasa University | Samdan W.,Sultan Ageng Tirtayasa University
Applied Mechanics and Materials | Year: 2014

Dual phase steels are an important advanced high strength steel, which have been widely used in the automotive industry for vehicle components requiring light weight and safety. In this study, the formation of dual phase structure with various volume fraction of martensite in a low carbon steel SS400 during intercritical annealing were investigated. It was found that intercritical annealing temperature and holding time affected the microstructure and mechanical properties of dual phase low carbon steel. The specimens were heated at intercritical annealing temperature of 750°C, 775°C, 800°C and 825°C, for holding periods of 6-18 minutes, followed by water quenching in order to get a dual phase ferrite and martensite. After quenching, it was obtained the optimal annealing conditions at 800oC with a holding periods of 10 minutes. In this condition, the tensile strength was increased up to 621 N/mm2 or 39.24% higher than the initial condition, while the elongation decreased up to 13.8%. The hardness of specimens increased from 127.7 to 235.83 HVN or up to 84.67% higher than the initial condition. Meanwhile the volume fraction of martensite was 24.08%. The higher the temperature of the heating value of grain growth rate constant (K) increases. In addition, at the optimal poin, the value of K (grain growth rate constant) and n (Avrami's exponent) were 0.263 and 0.318, respectively, with activation energy (Q) of 3.98 J/mol. © (2014) Trans Tech Publications, Switzerland.

Effendy M.,State University of Surabaya | Wardhono E.Y.,Sultan Ageng Tirtayasa University
MATEC Web of Conferences | Year: 2016

The catalytic oxidation of methane for abating the emission vented from coal mine or natural gas transportation has been known as most reliable method. A reverse flow reactor operation has been widely used to oxidize this methane emission due to its capability for autothermal operation and heat production. The design of the reverse flow reactor requires a proper kinetic rate expression, which should be developed based on the operating condition. The kinetic rate obtained in the steady state condition cannot be applied for designing the reactor operated under unsteady state condition. Therefore, new approach to develop the dynamic kinetic rate expression becomes indispensable, particularly for periodic operation such as reverse flow reactor. This paper presents a novel method to develop the kinetic rate expression applied for unsteady state operation. The model reaction of the catalytic methane oxidation over Pt/-Al2O3 catalyst was used with kinetic parameter determined from laboratory experiments. The reactor used was a fixed bed, once-through operation, with a composition modulation in the feed gas. The switching time was set at 3 min by varying the feed concentration, feed flow rate, and reaction temperature. The concentrations of methane in the feed and product were measured and analysed using gas chromatography. The steady state condition for obtaining the kinetic rate expression was taken as a base case and as a way to judge its appropriateness to be applied for dynamic system. A Langmuir-Hinshelwood reaction rate model was developed. The time period during one cycle was divided into some segments, depending on the ratio of CH4/O2. The experimental result shows that there were kinetic regimes occur during one cycle: kinetic regime controlled by intrinsic surface reaction and kinetic regime controlled by external diffusion. The kinetic rate obtained in the steady state operation was not appropriate when applied for unsteady state operation. On the other hand, the kinetic rate expression obtained in the unsteady state operation fitted quite well. It was proven that in one cycle period the kinetic rate would always shift according to the ratio of CH4/O2. © Owned by the authors, published by EDP Sciences, 2016.

Sholehah A.,University of Indonesia | Sholehah A.,Sultan Ageng Tirtayasa University | Yuwono A.H.,University of Indonesia | Rimbani C.R.,Sultan Ageng Tirtayasa University
Materials Science Forum | Year: 2013

ZnO nanorods were deposited on ITO glass substrate via chemical bath deposition at low temperature of 90°C. The seeding solution was made by dissolving zinc nitrate tetrahydrate and methenamine in cool water (5°C). The as-synthesized ZnOs were further subjected to posthydrothermal treatment series. The results of scanning electron microscope (SEM) studies showed that the ZnO nanorods were grown as vertically-aligned hexagonal structure, while x-ray diffraction (XRD) patterns showed a high intensity of [002] peak. The absorption spectra of the as-synthesized sample indicated a strong absorption peak near the UV region. After post-hydrothermal treatments, the absorption was slightly shifted to visible region. The ZnO nanorods sample derived from posthydrothermal treatment at 150°C for 12 hours has the largest crystallite size of 269.402 nm and the lowest band gap energy, Eg value of 3.205 eV.© (2013) Trans Tech Publications, Switzerland.

Wibisono G.,University of Indonesia | Firmansyah T.,Sultan Ageng Tirtayasa University
Asia-Pacific Microwave Conference Proceedings, APMC | Year: 2012

In this paper, multiband low noise amplifier (LNA) with multi-section impedance transformer (MIT) as impedance matching is designed, fabricated and evaluated. MIT is used as input and output impedance matching because MIT has higher stability, large Q factor, and low noise than lumped component. MIT is easy to fabricate and measure. The aim of the research is to design multiband LNA with MIT at center frequencies located at 0.95 GHz for GSM, 1.85 GHz for WCDMA and 2.65 GHz for LTE. Designed and evaluated of the proposed multiband LNA with MIT is done by using advanced desain system (ADS). It shown from the simulated results that performances of the proposed LNA at center frequency of 0.950 GHz has return loss, S11 = -23.541 dB, insertion loss, S 21 = 18.911 dB, noise figure, NF = 1.475 dB, VSWR = 1.143, and FoM = 8.38, respectively. At center frequency of 1.85 GHz, the proposed LNA has S 11 = -23.771 dB, S21 = 12.858 dB, NF = 1.988 dB, VSWR = 1.139, and FoM = 2.616. At center frequency 2.65 GHz, the proposed LNA has S11 = -23.521 dB, S21 = 10.180 dB, NF = 2.776 dB, VSWR = 1.143, and FoM = 1.152. The center frequencies of fabricated proposed multiband LNA with MIT are shifted in average to 5-10 MHz lead to simulation results, and the performances of the fabricated of the proposed LNA with MIT are degraded about 7-10% by using Monte-Carlo Yield Analysis. © 2012 IEEE.

Alimuddin,Sultan Ageng Tirtayasa University
2010 International Conference on Distributed Frameworks for Multimedia Applications, DFmA 2010 | Year: 2010

Traffic lights are a form of intersection traffic controlling operations are the most commonly applied, especially in urban areas. Traffic lights at the intersection plays an important role in determining the smooth distribution of vehicles on the road, so traffic light system of regulation that would better facilitate traffic flow on a set path. Goal of Settings Logic Analysis of Traffic Lights is based on fuzzy logic: First, Knowing membership functions of input and output of vehicles coming vehicles and output of vehicles at the intersection of Mount Bawakaraeng and duration of green light output in the fuzzy set. Fourth, Knowing the duration of effective green light by using fuzzy logic at the intersection of Mount Bawakaraeng. In this paper there are three membership functions, namely: input membership functions of the arrival of vehicles, vehicle output membership function and membership function duration of green light output. Each membership function is formed by classifying the input and output fuzzy sets by using the mamdani triangle curve representation. To input the number of vehicles coming d. To iutput the number of vehicle V. Membership function of output duration of green lights l. Results Discussion that the duration of effective green light at the intersection of Mount Bawakaraeng Makassar when re-employment, namely: For the arrival of the vehicle 17 and the output of the vehicle 16 so that the effective duration of green lights 50 seconds, for the arrival of vehicles 17 vehicles 18 and outputs the duration of green lights effective 51 seconds, for the arrival of 19 vehicles and 17 vehicles output then the effective duration of green lights 51 seconds, for the arrival of the vehicle 20 and the output of the vehicle 18 so that the effective duration of green lights 54 seconds, for the arrival of 21 vehicles and 19 vehicles, the duration of the output green light Effective 57 seconds. Conclusion First, Know the membership function of input and output number of vehicles coming vehicle at the intersection of Mount Bawakaraeng by Veterans in Makassar and the output duration. Burning green light, so the third relation the input variable arrival of vehicles, vehicle output and the output of green light duration is closely related to each other, Second The results obtained indicate the duration of effective green light at the intersection of Mount Bawakaraeng with Veterans at the road when people come home from work. © 2010 University Sains Malaysia.

This research aim to know: (1) how much the influence the three the factors of productions to yield product, (2) efficiency of using raw material, fuel, and labor. A Survey was applied in this study. The population consisted of melinjo chips producers in Menes. A Sample was sorted out trough stratified random sampling. The sample consisted of 32 producers. With respect to its raw material used, 11 producers more similar to 15 kg and the others, 21 producers produced less than 15 kg. Cobb-Douglas production function and efficiency analysis were applied. The results of this study indicated that Simultaneously melinjo chips production is influenced by melinjo seed (raw material), fuel and labor. Partially melinjo seed (raw material) and fuel significant effect on the production of melinjo chips, and significant experiences tapped to melinjo chips production, While labor did not significantly affect the production of melinjo chips. © 2016, Research India Publications.

Putra A.N.,Sultan Ageng Tirtayasa University
Research Journal of Microbiology | Year: 2015

The present study was aimed to obtain amylolytic bacteria probiotic to improve feed digestibility and growth performance in tilapia. All of the bacteria were isolated from the digestive tract of tilapia. The probiotic bacteria candidates were screened for amylolytic activity, bacterial growth rate, the resistance to acid and alkali, antagonistic activity, attachment and pathogenicity in tilapia. The selected isolates were then tested in vivo to observe their ability to improve feed digestibility and growth performance in tilapia. Two treatments with four replicates consisted of the control (without any probiotic) (A) and the probiotic (B) at a dose of 1% v/w feed were administered every day for 60 days. There were 41 isolates which secreted amylase and the five isolates with the largest diameter of the clear zone were NB1, NB2, NB3, NB4 and NB5. Isolate NP5 demonstrated the best results: It had amylolytic activity with a clear zone diameter of 20.3 cm, it grew rapidly with a generation time of 33.59 min, it had antagonistic properties against the pathogenic bacteria Aeromonas hydrophila and Streptococcus sp., with the inhibition zones of 12.0 and 11.0 cm, respectively. It had the ability to adhere to stainless steel plates and it was not pathogenic to tilapia. The feeding trial in tilapia showed that the probiotic treatment resulted in better feed digestibility and growth performance than those of the control. © 2015 Academic journals Inc.

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