Manila, Philippines
Manila, Philippines

Mapúa Institute of Technology is a non-sectarian, research oriented, Filipino tertiary institute located in Intramuros, Manila and in Makati.It was founded by the first registered Filipino architect, Don Tomas Mapua, in 1925, a graduate of Cornell University. After he died, the tradition was continued by his children, Don Óscar B. Mapúa Sr., a graduate in Civil Engineering from the Massachusetts Institute of Technology, and Gloria Mapúa-Lim.Mapua Institute of Technology is the premiere engineering school in the Philippines. It is a reputable source of architects, engineers, and science graduates and constantly produces top notchers in the architectural and engineering fields as the Mapúa Institute of Technology heavily specializes in these fields in the undergraduate and graduate levels, aside from its widening array of undergraduate programs such as Psychology, Computer Science, Digital Cinema, Multimedia Arts and science, Technical Communication, Information Technology, Accounting, Entrepreneurship, Business Management, Hotel & Restaurant Management, and Nursing.The Institute has been granted with the Level IV Accredited Status to its Civil Engineering program by the Philippine Association of Colleges and Universities Commission on Accreditation , which is one of the first engineering programs to be accorded such status. In addition, the Commission on Higher Education recently recognized Mapúa’s Mechanical Engineering , Computer Engineering and Electronics Engineering programs as Centers of Development for Engineering .Mapúa is also the first Philippine and Southeast Asian educational institution to have ABET certification, rendering the Institute to be at par with US-based colleges and universities. Wikipedia.

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Arshadi M.,Islamic Azad University at Fasā | Salimivahid F.,Mapua Institute of Technology | Salvacion J.W.L.,Mapua Institute of Technology | Soleymanzadeh M.,Mapua Institute of Technology
RSC Advances | Year: 2014

In this paper, a novel nano-adsorbent containing Mn-nanoparticle decorated organo-functionalized SiO2-Al2O3 mixed-oxide was introduced as a new scavenger of dyes such as methyl orange. The SiO 2-Al2O3 mixed-oxide was functionalized with a Schiff base ligand and thereafter, in the next step, Mn-nanoparticles were prepared over the organo-functionalized SiO2-Al2O 3 mixed-oxide. The synthesized materials were characterized by several methods, such as FT-IR spectroscopy, UV-vis, CHN elemental analysis, SEM, TEM, ICP-OES, EPR and XPS. The contact time to obtain equilibrium for maximum adsorption was 15 min. EPR and XPS of the Mn ions evidenced that most of the covalently bonded active sites of the nano-adsorbent are in the form of Mn(iii) ions. The heterogeneous Mn(iii) ions were found to be an effective adsorbent for the removal of methyl orange ions from solution. The adsorption process was spontaneous and endothermic in nature and followed a pseudo-second-order kinetic model. This journal is © the Partner Organisations 2014.

Siongco K.R.,Chung Yuan Christian University | Leron R.B.,Chung Yuan Christian University | Leron R.B.,Mapua Institute of Technology | Li M.-H.,Chung Yuan Christian University
Journal of Chemical Thermodynamics | Year: 2013

In this work, we report new experimental data on density, ρ, refractive index, nD, and viscosity, η, of two deep eutectic solvents, N,N-diethylethanol ammonium chloride-glycerol (DEACG) and N,N-diethylethanol ammonium chloride-ethylene glycol (DEACEG), and their aqueous solutions, over the complete composition range, at temperatures from (298.15 to 343.15) K. Densities and viscosities were measured using the vibrating tube and the falling ball techniques, respectively, while the refractive index at the sodium D line was measured using an automatic refractometer. We aimed to represent the measured properties as a function of temperature and composition, and correlated them using the Redlich-Kister-type equation, for density, a polynomial function, for refractive index, and the Vogel-Fulcher-Tammann (VFT) equation, for viscosity. © 2013 Elsevier Ltd. All rights reserved.

Chang Y.-C.,Chung Yuan Christian University | Leron R.B.,Chung Yuan Christian University | Leron R.B.,Mapua Institute of Technology | Li M.-H.,Chung Yuan Christian University
Journal of Chemical Thermodynamics | Year: 2013

In this study, we report new experimental measurements on the solubility of carbon dioxide in aqueous blended amine solutions containing diethylenetriamine (DETA) and piperazine (PZ) (at 30 wt% total amine concentration). Solubility data for CO2 in aqueous DETA solutions at several concentrations (20, 30, 40) wt% are also presented. Measurements were performed in a vapor-liquid equilibrium apparatus at temperatures (313.2, 333.2, 353.2) K and pressures up to around 900 kPa. It was found that the solubility of CO2 in the systems studied were appreciably higher than in typical amine solvents. A modified Kent-Eisenberg model was used to correlate the obtained solubility of CO2 (expressed as mole CO2 per mole amine) in the solvent with CO2 partial pressure, temperature, and amine concentration. The model gave satisfactory representations of the solubility data at reasonable average absolute deviations between the experimental and the calculated values (of CO2 partial pressures) of 16% and 17%, for the binary and ternary systems, respectively. © 2013 Elsevier Ltd. All rights reserved.

Leron R.B.,Chung Yuan Christian University | Soriano A.N.,Mapua Institute of Technology | Li M.-H.,Chung Yuan Christian University
Journal of the Taiwan Institute of Chemical Engineers | Year: 2012

Deep eutectic solvents (DES) are new emerging alternatives to conventional ionic liquids that may find a number of interesting applications in industrial and chemical processes. In this study, the densities, ρ, and refractive indices, n D, of the DESs (choline chloride+ethylene glycol) and (choline chloride+glycerol) and their aqueous mixtures were investigated at atmospheric pressure over the temperature range 298.15-333.15K and across a complete composition range. The excess molar volumes, V E, and refractive index deviations, Δn D, were also calculated from experimental results. The calculated excess molar volumes were negative at all temperatures over the entire range of composition considered, suggesting the presence of strong interactions between water and the DES in the mixtures. The refractive index deviations, on the other hand, were found positive in the entire concentration range. The calculated properties were fitted to a Redlich-Kister type equation to correlate them to the temperature and composition. The correlations used satisfactorily represent the densities and refractive indices of the pure DESs and their aqueous binary mixtures as functions of temperature and composition as indicated by the low overall average absolute deviations obtained in the calculations. © 2012 Taiwan Institute of Chemical Engineers.

Mananghaya M.R.,Mapua Institute of Technology
Journal of the Korean Chemical Society | Year: 2012

Dopants and defects can be introduced as well as the intercalation of metals into single wall carbon nanotubes (SWCNTs) to modify their electronic and magnetic properties, thus significantly widening their application areas. Through spinpolarized density functional theory (DFT) calculations, we have systemically studied the following: (i) (10,0) and (5,5) SWCNT doped with nitrogen (CN xNT), (ii) (10,0) and (5,5) SWCNT with pyridine-like defects (3NV-CN xNT), and (iii) chemical functionalization of (10,0) and (5,5) 3NV-CNxNT with 12 different transition metals (TMs) (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Pd, and Pt). Attention was done in searching for the most stable configurations, deformation, calculating the formation energies, and exploring the effects of the doping concentration of nitrogen and pyridine-like nitrogenated defects on the electronic properties of the nanotubes. Also, calculating the corresponding binding en rgies and effects of chemical functionalization of TMs on the electronic and magnetic properties of the nanotubes has been made. We found out that the electronic properties of SWCNT can be effectively modified in various ways, which are strongly dependent not only on the concentration of the adsorbed nitrogen but also to the configuration of the adsorbed nitrogen impurities, the pyridine-like nitrogenated defects, and the TMs absorbed; due to the strong interaction between the d orbitals of TMs and the p orbitals of N atoms, the binding strengths of TMs with the two 3NV-CNxNT are significantly enhanced when compared to the pure SWCNTs.

Arshadi M.,Islamic Azad University at Fasā | Soleymanzadeh M.,Mapua Institute of Technology | Salvacion J.W.L.,Mapua Institute of Technology | SalimiVahid F.,Mapua Institute of Technology
Journal of Colloid and Interface Science | Year: 2014

In this study, the synthesis and characterization of a new adsorbent containing nanoscale zerovalent iron particles (NZVI) decorated sineguelas waste (S-NaOH-NZVI) from agriculture biomass was investigated for the adsorption/reduction of inorganic pollution such as Pb(II) ions. The combination of ZVI particles on the surface of sineguelas waste can help to overcome the disadvantage of ultra-fine powders which may have strong tendency to agglomerate into larger particles, resulting in an adverse effect on both effective surface area and catalyst performance. The synthesized materials were characterized with different methods such as FT-IR, BET, XRD, TEM and pHPZC. Good dispersion of NZVI particles (ca. 10-70nm) on the sineguelas waste was observed. The effects of various parameters, such as contact time, pH, concentration, adsorbent dosage and temperature were studied. The adsorption of Pb(II) ions has been studied in terms of pseudo-first- and second-order kinetics, and the Freundlich, Langmuir and Langmuir-Freundlich isotherms models have also been used to the equilibrium adsorption data. The adsorption kinetics followed the mechanism of the pseudo-second-order equation. The thermodynamic parameters (δG, δH and δS) indicated that the adsorption of Pb(II) ions were feasible, spontaneous and endothermic at 25-80°C. XRD analysis indicated the presence of Pb(0) on the S-NaOH-NZVI surface. This study suggests that the modified sineguelas waste by NZVI particles can be prepared at low cost and the materials are environmentally benign for the removal of Pb(II) ions, and likely many other heavy metal ions, from water. © 2014 Elsevier Inc.

Arshadi M.,Islamic Azad University at Fasā | Salimi Vahid F.,Mapua Institute of Technology | Salvacion J.W.L.,Mapua Institute of Technology | Soleymanzadeh M.,Mapua Institute of Technology
Applied Surface Science | Year: 2013

In this study, the application of a functional ferrocene (ferrocenecarboxaldehyde) firmly heterogenized over a modified nano-size SiO2-Al2O3 mixed-oxides was reported as a novel adsorbent for the removal of methyl orange from aqueous solution. SiO 2-Al2O3 mixed-oxides was functionalized with 3-aminopropyl-triethoxysilane (3-APTES) group and ferrocenecarboxaldehyde covalently linked on this organo-functionalized SiO2-Al 2O3 mixed-oxides support. The synthesized materials were characterized by FT-IR spectroscopy, UV-vis, CHN elemental analysis, BET, TGA, ICP-MS, TEM, and XPS. The contact time to obtain equilibrium for maximum adsorption was 50 min. XPS of Fe ions evidenced that most of the active sites of the nano-adsorbent is in the form of Fe3+ ions at the surface. The heterogeneous Fe3+ ions were found to be effective adsorbent for the removal of dyes from solution. The adsorption of methyl orange ions has been studied in terms of pseudo-first-order and pseudo-second-order kinetics, and the Freundlich, Langmuir, and Langmuir-Freundlich isotherm models have also been applied to the equilibrium adsorption data. The adsorption process was spontaneous and endothermic in nature and followed pseudo-second-order kinetic model. ©2013 Elsevier B.V. All rights reserved.

Ibanez V.P.,Mapua Institute of Technology
Lecture Notes in Engineering and Computer Science | Year: 2015

Constant increase in power rate in the Philippines is attributed to the lack of supply to meet the consumer's demand. As a result, high consumption cost is added to the household budget especially when measures on conserving power are neglected. Such scenario inspired the researcher in creating a home automation technology to manage household power consumption applying current technology trends like the massive usage of internet and smart phones, at a minimal and reasonable cost. In order to attain the objectives of the study, affordable and quality technologies were considered. The android application was developed using MIT App Inventor. The android smart phone serves as the graphical user interface. The Arduino WiFi shield and the code written in C Language programmed in the Gizduino microcontroller make the wireless data communication between smart phone and the Programmable Toggle Switch (PTS). The device with patent title Programmable Toggle Switch and patent number PH/1/2009/272 is a smart device capable of automatic or manual control of connected electrical loads. The PTS is where the home appliances are connected that interprets the command from the microcontroller and executes possible action to the command executed in the android application. As a result, control to the home devices or appliances such as lights, TV and aircon, and power consumption management in the household were made possible at a minimal cost.

Pacis M.C.,Mapua Institute of Technology
IEEE Region 10 Humanitarian Technology Conference, R10-HTC 2015 - co-located with 8th International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment and Management, HNICEM 2015 | Year: 2015

Every power system grid in any nation experiences outage in its transmission line, distribution lines, substations, generators and transformers, either a single element or combination of the elements at the same time which affects the delivery of power to the consumers. Statistical computation is used to determine the cases of the combination of outages that occurred at the same time. This paper presents the development of a search algorithm for contingency case identification which helps the operator to decide on what should be done to the system and return to its normal operation when outages occurred. The study focuses on IEEE bus 6 system that was modeled and simulated on MatPower, making the line/load flows as the predetermined values of the database. The MATLAB software codes are responsible on the search algorithm for contingency case identification. The modeling of the system is satisfactory because the values of % difference are within the specified ±5% tolerance. It is concluded that the case search algorithm is working properly on the IEEE 6-bus system. © 2015 IEEE.

Ghafari N.,Mapua Institute of Technology
International Journal of Mining Science and Technology | Year: 2013

High level of structural and waterproofing stability leads to long-term service life in underground infrastructures. Interaction between aggressive groundwater with tunnel causes corrosion and damage in concrete structure due to steel reinforcement corrosion and concrete cracks. This study introduces a double waterproofing shield system (DWS) as an innovative solution to waterproofing and structural failures in underground concrete structures. In this method, ordinary shotcrete mixture replaces by an organic polymer concrete (OPC) to construct a water-resistant temporary support right after each partial excavation. Two groups of specimens including reference concrete and OPC specimens were provided and tested in accordance with ASTM C 642. Waterproofing parameters including porosity, pore volume, permeability and hydraulic conductivity have been determined. Results show a remarkable reduction in mentioned parameters for OPC compared with ordinary concrete. Improvement in waterproofing performance of temporary support corresponds to a healthy final lining and increase in service life of the structure. © 2013 Published by Elsevier B.V.

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