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2017 International Automatic Control Conference, CACS 2017

作者： Hernandez, Miguel Angel Benalcazar Chen, Chin-Sheng Tsai, Shun-Hung Li, Shih-Yu International Master Program in Mechanical and Automation Engineering National Taipei University of Technology Taipei Taiwan Gratitude Institute of Automation Technology National Taipei University of Technology Taipei Taiwan

ISBN: (纸本)9781538639009

This paper presents an authorization-sensitive image encryption algorithm in bit level, which is applied by moving a selected pixel window through the whole image. Multi-level encryption scheme covered with two hyper-chaotic systems combining with one logistic map, are further developed in the encryption algorithm to confuse the relationship between plain image and cipher image. Initial conditions for shuffling and confusing stages are generated by the proposed authorization system after being provided by the user at the beginning of the process. In addition, the data given in the authorization system is encoded into The RFC 4648 base 32 alphabet and then mixed to generate the necessary information before operating the encryption process. Results of several experiments show that this novel image encryption algorithm has an effective encryption performance as well as a high level of security. © 2017 IEEE.

关键词： Cryptography

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Non-newtonian Rabinowitsch Fluid Effects on the Lubrication Performances of Sine Film Thrust Bearings

Non-newtonian Rabinowitsch Fluid Effects on the Lubrication ...

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2017第二届电气工程，机械工程与自动化国际会议

作者： Jaw-Ren Lin Hsiu-Lu Chiang Yu-Kang Chiu Department of Mechanical Engineering Nanya Institute of Technology Master Program of Mechanical and Mechatronics Engineering Nanya Institute of Technology

Thrust bearings are generally developed to sustain axial load generated from rotating machinery. Predicting lubrication performances of thrust bearings plays an important role in engineering applications. Taking into account the effects of non-Newtonian rheology, the lubrication performances for a sine film thrust bearing are investigated in the present paper. By employing a small perturbation technique to the nonlinear non-Newtonian Reynolds equation, analytical solutions of the film pressure, the load-carrying capacity, the friction parameter and the required volume flow rate are derived. Comparing with the case lubricated with a Newtonian lubricant, the non-Newtonian Rabinowitsch fluids(including the pseudo-plastic fluids and the dilatant fluids) show significant influences on the lubrication performances of a sine film thrust bearing, especially for a larger value of the non-Newtonian parameter.

关键词： Non-newtonian Rheology Sine Film Thrust Bearings Load Performances

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Static simulation to horse shoes alternative materials based basic polymeric foam reinforced fiberglass with ANSYS software

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Journal of Physics: Conference Series 2018年第4期1116卷

作者： R E K Siregar B Syam B Wirjosentono M Muttaqin Student of Master Program in Mechanical Engineering Universitas Sumatera Utara Faculty of Engineering Universitas Sumatera Utara Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Master of engineering Department of Mechanical Engineering Faculty of Engineering Universitas Sumatera Utara

In this journal, we used Finite Element Method (FEM) calculations based on ANSYS software. The software will involves the value of the material properties. Then, will used to simulate the manufacture of horse shoe, when the horse stood silent, for fiberglass reinforced polymer materials and compared with the usual materials for horse shoe, the Mild Carbon Steel (A36) so that will be obtained which is the best between the two materials. In this simulation work, the horse shoe receives a load of 500 kg. From this simulation we will obtain Equivalent Stress, Normal Stress on each axis (X, Y, Z) from the loading direction experienced by horse shoes. Equivalent equivalence values of 0.21509 MPa polymeric foam while Mild Carbon Steel (A36) 0.1034 MPa and normal polymeric foam voltage values for X-axis 0.016426, Y -0.007111 and Z 0.0695, while Normal Stress from Mild Carbon Steel (A36) for X axes 0.02233, Y 0.0204 and Z 0.047. The simulation results provide an understanding of the normal force resistance of polymeric foam materials for Mild Carbon Steel (A36) materials, whereas for polymeric foam materials the equivalent stress is superior to Mild Carbon Steel (A36)

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Energy efficiency effect on the public street lighting by using LED light replacement and kwh-meter installation at DKI Jakarta Province, Indonesia

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Journal of Physics: Conference Series 2018年第1期1022卷

作者： Panggih Sudarmono Deendarlianto Adhika Widyaparaga Master Program of Systems Engineering Faculty of Engineering Universitas Gadjah Mada Department of Mechanical and Industrial Engineering Faculty of Engineering Universitas Gadjah Mada

Public street lighting consumes large energy for the public interest, but many street lights still do not use energy-saving technologies. In 2014, Provincial Government of DKI Jakarta operated 179,305 units of street lights. Of the number of installed armature, 92 % of them or 166,441 units are HPS (High-Pressure Sodium) armatures which are inefficient. In 2016, the Provincial Government of DKI Jakarta cut down the energy used for street lighting, by implementing the programs of kWh-meter installation in every street lighting panel and use energy-saving lamps equipped with the smart system. The Provincial Government of DKI Jakarta is registered with 6,399 customer IDs in PLN (State Owned Electric Company), and gradually carried out the kWh Meter installation and changes to the contract. The program to use energy-saving lights done by replacing the HPS armature that is not energy efficient to LED armature which is known to be energy efficient. Until the end of 2016, the number of armatures that has been replaced was 89,417 units. The research results on 25 samples of PLN customer IDs and the replacement of 2,162 units armature, showed that the energy efficiency through kWh meter installation and armature replacement reduce the power consumption from 330,414 kWh to 71,278 kWh or by 78.43%. Generally, there was a decrease in the value of electricity bill compared to the before the replacement. The program of kWh-meter installations and replacement of the armature has a payback period of 2.66 years.

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Effects of chemical treatment on the structure and morphology of bacterial cellulose film

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AIP Conference Proceedings 2019年第1期2120卷

作者： Tito Arif Sutrisno Heru Suryanto Retno Wulandari M. Muhajir 1Master Student of Mechanical Engineering Program Graduate School Universitas Negeri Malang Jl. Semarang 5 Malang East Java Indonesia 2Centre of Advanced Materials for Renewable Energy Universitas Negeri Malang Jl. Semarang 5 Malang East Java Indonesia65140 3Mechanical Engineering Department Engineering Faculty Universitas Negeri Malang Jl. Semarang 5 Malang East Java Indonesia

Development of extraction process of Bacterial Cellulose (BC) using chemical treatment in order to be developed as reinforcement in the composite product to improve fiber compatibility of BC in polymer metric. This study aimed to know the effect of chemical treatment against the structure and morphology of BC film. The methods used to make a film from BC fiber obtained from pineapples’ peels waste. Pellicle was fermented for 14 days then washed by distilled water prior to treatment. Pellicle soaked in a chemical solution such as NaOH, H2O2, Bmimcl with each concentration of 2.5% for 2 hours then dried in the oven and the result was analyzed using SEM and XRD. The result showed that chemical treatment against BC decreased the intensity and crystallite size. On distilled water immersion (as control), the highest peak diffraction located in peak 22.63 °2θ with intensity of 292.31 counts, the crystallite size of 10.01 nm, after NaOH, H2O2 and BmimCl chemical treatment, the peak intensity decreased consecutively to 251.19 counts, 269.32 counts, and 241.49 counts as well as crystallite size decrease to 3.61 nm, 4.07 nm, and 5.11 nm, respectively. SEM observation showed that BC film treated using distilled water wasn’t damaged, while fiber and pellicle which treated using NaOH had a lot of damage.

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Manufacture of polymeric foam and polyurethane composites with fiberglass boosters

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Journal of Physics: Conference Series 2018年第4期1116卷

作者： Mawardi B Syam B Wirjosentono D S Dharma Student of Mechanical Engineering Master Program Universitas Sumatera Utara Department of Mechanical Engineering Universitas Sumatera Utara Department of Mathematics and Natural Sciences Universitas Sumatera Utara

The purpose of this research is to know the mechanical characteristics of polymeric foam and polyurethane with fiberglass reinforcement. The focus of the observations on the average maximum compressive force, mean maximum stress and elastic modulus where the observed characteristics are obtained from static press test. Furthermore, tensile testing is performed to observe the mechanical characteristic of mean maximum force, mean maximum stress and elastic modulus. The polymer as a matrix is use 157 BQTN-EX with thermoset resin with fiberglass reinforcement. Tensile test specimens were made according to ASTM D638 standard and ASTM 1621-00 standard for static press test. Three variation of composition is A, B and C where fiberglass used 10%, catalyst 5%, resin 55% and polyurethane 30%. The test result showed that the test specimen on composition C value of characteristic compressive force average 22.838 kN, the mean maximum compressive stress average 19.128 MPa and average modulus of elasticity is 161.447 MPa. While on tensile test the variation of material composition with the same fiber was obtained on compositional test specimen C value of the mean gravity characteristics of the average maximum of 1.214 kN, the mean maximum tensile stress is 20.243 MPa and average modulus of elasticity is 803.634 MPa.

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mechanical properties of bacterial nanocellulose membrane from pineapple peel waste after homogenization process

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AIP Conference Proceedings 2019年第1期2120卷

作者： Taufiq Mahsuli Heru Suryanto Aisyah Larasati Muhammad Muhajir 1Master Student of Mechanical Engineering Program Graduate School Universitas Negeri Malang Jl. Semarang 5 Malang East Java Indonesia 2Centre of Advanced Materials for Renewable Energy Universitas Negeri Malang Jl. Semarang 5 Malang East Java Indonesia65140 3Mechanical Engineering Department Engineering Faculty Universitas Negeri Malang Jl. Semarang 5 Malang East Java Indonesia 4Department of Industrial Engineering Faculty of Engineering Universitas Negeri Malang Jl. Semarang 5 Malang East Java Indonesia

Bacterial nanocellulose (BNC) has unique physical properties such as having high crystallinity, mechanical strength, purity, porosity, high water absorption capacity and biodegradable. This research aims to investigate the effect of high-pressure homogenizer (HPH) treatment cycle on the tensile strength and morphology of BNC membrane. This experiment begins from pineapple peel waste juice added with Acetobacter xylinum incubated for 14 days. The yielded pellicle then washed by distilled water then immersed in 1% NaOH for 24 h and pellicle well disintegrated using a high-speed blender, followed by homogenizing using HPH with repetition of 5 cycles at 150 bar. The solution was cast into a rectangular glass container and dried into an oven at 60 °C for 8 h. Results show that the tensile strength of BNC was 77.76 MPa and 75.97 MPa for membrane without HPH process and HPH process, respectively. The elastic modulus of BNC was16 GPa and 27.25 GPa for membrane without HPH process and HPH process, respectively. Morphological analysis using Scanning electron microscopy (SEM) showed the pores of BNC membrane prepared using HPH smaller than non-HPH. This means that the BNC membrane prepared by HPH was dense compared than Non-HPH membrane. Dense membrane caused a higher strength of the membrane.

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Techno-economic analysis of a central receiver power plant with different levels of storage capacity and hybridization

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AIP Conference Proceedings 2018年第1期2033卷

作者： Daniel L. C. Costa José H. M. Neto 1Energy Engineering Master’s Degree Mechanical Engineer. Centro Federal de Educação Tecnológica de Minas Gerais Department of Mechanical Engineering – Master Program of Energy Engineering. Address: Av. Amazonas 7675 Belo Horizonte-MG Brazil 30510-000. Phone: +55-31-999986464 2Civil Engineering Doctoral Degree Mechanical Engineering Master’s Degree Mechanical Engineer. Centro Federal de Educação Tecnológica de Minas Gerais Department of Mechanical Engineering – Master Program of Energy Engineering. Address: Av. Amazonas 7675 Belo Horizonte-MG Brazil 30510-000

The energy storage and fossil-backup (fossil-hybridization) systems of a concentrating solar power plant (CSP) provide a continuous production of energy all over the year and satisfy the grid demand even when the sun is not shining. One could ask about the behavior of the energy production, or the levelized energy cost, as a function of the energy storage and of the fossil-hybridization in such plants. This paper tries to answer this question. For this task, there have been performed numerous simulations on a central receiver plant with a fixed nominal power, varying the storage capacity and the level of hybridization. The results showed that these variables impact differently. For the thermal storage, from capacities ranging from 0h to 24h, there is a specific intermediary capacity, 15h, in which the levelized energy cost is minimum. But for the fossil-hybridization, this energy cost always decreases with the increment of the hybrid level. The results also showed that, if a given energy production is supported by a certain level of hybridization, its energy cost would be less than that supported by a storage system. This is due to the relatively high investment costs related to the storage system, and the relatively low cost of fuel.

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Supplier selection and order allocation using TOPSIS and linear programming method at Pt. Sekarlima Surakarta

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AIP Conference Proceedings 2019年第1期2097卷

作者： Yunus Nazar Ridya Amerani Pra Lovian Dwi Cahyadi Raharjo Cucuk Nur Rosyidi 1Master Program of Industrial Engineering Universitas Sebelas Maret JL. Ir. Sutami 36A Surakarta 57126 Indonesia 2Weaving Engineering AK Tekstil Solo JL. Ki Hajar Dewantara Surakarta 57126 Indonesia 3Spinning Engineering AK Tekstil Solo JL. Ki Hajar Dewantara Surakarta 57126 Indonesia 4Department of Mechanical Engineering Universitas Soerjo JL. Cepu KM 3 Kotak Pos 15 Ngawi 63251 Indonesia

PT. Sekarlima is a woven fabrics manufacturing company. One of the raw materials for fabric weaving process is yarn. To fulfill the demand for woven fabric the company faces some problems in supplier selection and the allocation of raw materials. Supplier selection and the allocation are essential to support the smoothness of the production process. To produce a good quality product the company needs a good planning system and integrated implementation, in accordance with production activities in which it cannot be separated from raw materials. Supplier selection is important in this activity, as it will determine the cost of production. The aims of this research are to determine a set of appropriatesuppliers of yarn using the TOPSIS method and allocate theyarn to selected suppliers using Linear programming model. TOPSIS is one of the multi-criteria decision methods in which the selected alternative determined by the closest distance of the ideal solution and has the furthest distance from the non-ideal solution using the Euclidean distance (the distance between two points) to determine the relative distance of the alternative. From the results of the analysis, there are 4 suppliers are selected, namely TYF, AGT, DLS, and APC. Five criteria are used in the supplier selection, namely quality, price, delivery, flexibility, and responsiveness. TOPSIS resulted in the order of rank of each supplier TYF, AGT, DLS, and APC is 0.52, 0.48, 0.48, and 0.23 respectively. The order allocation from a linear programming model for each supplier is 1088. 64 kg, 870.91 kg, 526.18 kg, and 54.43 kg.

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The effect of ZnO addition against crystallinity and water absorption capacity of biofoam based cassava starch reinforced bacterial cellulose

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AIP Conference Proceedings 2019年第1期2120卷

作者： Moh. Astono Basuki Heru Suryanto Aisyah Larasati Poppy Puspitasari Mujiono 1Master Program of Mechanical Engineering Graduate School Universitas Negeri Malang Jl. Semarang 5 Malang East Java Indonesia 2Centre of Advanced Materials for Renewable Energy Universitas Negeri Malang. Jl. Semarang 5 Malang East Java Indonesia 3Department of Mechanical Engineering Faculty of Engineering Universitas Negeri Malang. Jl. Semarang 5 Malang East Java Indonesia 4Department of Industrial Technology Universitas Negeri Malang. Jl. Semarang 5 Malang East Java Indonesia

Polystyrene is one type of plastic that is hard to be degraded, because of that, it requires an alternative to reduce polystyrene waste through biofoam. Biofoam which is made of starch is reinforced with bacterial cellulose that has high hydrophilic properties. This study aims to know the effect of ZnO addition to crystallinity and water absorption capacity of biofoam based cassava starch reinforced bacterial cellulose. The method used experimental design. Synthesis of biofoam was conducted using baking process method with varied the ZnO content in the biofoam were 0%, 3%, 6%, 9%. The resulted samples were analyzed by X-ray diffraction and water absorption test to determine the effect of ZnO concentration. The results showed that the addition of ZnO variation into biofoam caused the change in diffraction position and intensity. The control variation (0% ZnO) had the highest diffraction peak at the position of 20.88°2θ with an intensity of 68.65 counts, crystallite size of 20.795 nm. After adding ZnO variation of 3%, 6%, 9%, diffraction position and intensity change to be 36.31°2θ and 276.29 counts, 36.26°2θ and 558.81 counts, and 36.31°2θ and 725.78 counts, respectively. The addition of ZnO into biofoam composite decreased water absorption up to 33% compared than the control sample, and the lowest optimum absorption resulted in ZnO concentration of 9% with water absorption value of 0.164 (gH2O/g).

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