Quiling, Philippines

Mariano Marcos State University

Quiling, Philippines

The Mariano Marcos State University is a multidisciplinary, state-funded institution of higher learning that serves the Ilocos Region and its surrounding regions in the Philippines. Wikipedia.

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Cervera R.B.M.,University of the Philippines at Diliman | Salamangkit-Mirasol E.A.,Mariano Marcos State University
Materials Science Forum | Year: 2016

Rice hull or rice husk (RH) is an agricultural waste obtained from milling rice grains. Since RH has no commercial value and is difficult to use in agriculture, its volume is often reduced through open field burning which is an environmental hazard. In this study, amorphous nanosilica from Philippine waste RH was prepared via acid precipitation method. The synthesized samples were fully characterized for its microstructural properties. X-ray diffraction pattern reveals that the structure of the prepared sample is amorphous in nature while Fourier transform infrared spectrum showed the different vibration bands of the synthesized sample. Scanning electron microscopy (SEM) and particle size analysis (PSA) confirmed the presence of agglomerated silica particles. On the other hand, transmission electron microscopy (TEM) revealed an amorphous sample with grain sizes of about 5 to 20 nanometer range and has about 95 % purity according to EDS analyses. The elemental mapping also suggests that leaching of rice hull ash effectively removed the metallic impurity such as potassium element in the material. Hence, amorphous nanosilica was successfully prepared via a low-cost acid precipitation method from Philippine waste rice hull. © 2016 Trans Tech Publications, Switzerland.

Bumanglag C.,Mariano Marcos State University | Alibuyog N.,Mariano Marcos State University
GISTAM 2017 - Proceedings of the 3rd International Conference on Geographical Information Systems Theory, Applications and Management | Year: 2017

Ilocos Norte is one of the provinces in the Philippines which depends mainly on surface water for domestic, agricultural, and industrial water use especially for communities in mountainous areas. However, reliable information is critically lacking nowadays and inventories has been outdated throughout the province. Therefore, there is a need for alternative technologies to detailed hydrologic mapping. With the aim of developing a detailed and comprehensive hydrologic maps using Light Detection and Ranging (LIDAR) data, supplemented with other remotely-sensed imageries and ancillary information from LGUs and NGAs, the effectivity of implemented processing workflows was evaluated for 7 river basins in Ilocos Norte. Extraction of streams, wetlands and irrigation network in Cabungaan, Gabo, Cabayoagan, Natbaon, Pasuquin, NA-Pasuquin and San Mateo River Basins were done and their extents were determined. The effectivity of workflows in extracting features was evaluated using confusion matrix and reveals 98.13% accuracy. The versatility of the implemented workflows was demonstrated by its ability to be applied in other areas of the Philippines. © 2017 by SCITEPRESS - Science and Technology Publications, Lda. All rights reserved.

Yadao R.D.,Mariano Marcos State University | Madalipay J.C.,Mariano Marcos State University | Alibuyog N.,Mariano Marcos State University | Utrera R.,Mariano Marcos State University | Galacgac E.,Mariano Marcos State University
GISTAM 2017 - Proceedings of the 3rd International Conference on Geographical Information Systems Theory, Applications and Management | Year: 2017

In this study, topography-based solar radiation model r.sun was used to estimate the monthly average daily clear sky Global Horizontal Irradiance (GHI) over Batac City, Ilocos Norte. High-resolution lidar data was used to derive the Digital Surface Model (DSM), slope and aspect rasters, and horizon raster maps taking the topographic shading into account. Linke Turbidity factor for each month were downloaded from the web to consider the atmospheric absorption of solar radiation. The generated monthly clear sky GHI rasters from r.sun were compared to the 2015 solar radiation data collected by the Mariano Marcos State University (MMSU) Agromet Station located near the Crop Research Laboratory, MMSU Batac. Statistical tests revealed that the measured values from the ground can be accurately estimated by the r.sun model with 95.34% proportion of variability. Land cover of the city was also extracted using Support Vector Machine (SVM) to get the building footprints and other open areas for the assessment of potential sites. The twelve GHI rasters were then clipped using the building footprints and bare earth areas from the extracted land cover. © 2017 by SCITEPRESS - Science and Technology Publications, Lda. All rights reserved.

Madalipay J.C.,Mariano Marcos State University | Utrera R.,Mariano Marcos State University | Alibuyog N.,Mariano Marcos State University | Yadao R.D.,Mariano Marcos State University
GISTAM 2017 - Proceedings of the 3rd International Conference on Geographical Information Systems Theory, Applications and Management | Year: 2017

Hydropower is the most important and widely-used renewable energy source. Hydro resource in the Philippines are abundant, it has been proven to be a viable source for clean energy for rural electrification and a source of mechanical energy to remote Philippine barangays. The study was aimed to use remote sensing data and technologies to assess the hydro-energy resource potential of the La Union river basins using Soil and Water Assessment Tool. Moreover, the study aims to identify potential locations for the establishment of hydro-energy power plants, its intake bays, powerhouse, penstocks, power generation capacity and classification. The study used the Soil and Water Assessment Tool, an ArcMap extension (ArcSWAT) to delineate and simulated the river flow using the available land use, soil and weather data obtained from Philippine agencies and world database. After the extraction of the river basins and subbasins, the delineated rivers riv1.shp was used to clip the Tagged Image File Format (TIFF) file of the La Union river basin. Extracted TIFF files was used to generated potential heads using the Head Determination Algorithm which was programed to search for minimum head of 20 meters and maximum predefined penstock lengths of 100 meters, 500 meters and 1000 meters. Power calculation and classification of potential sites was processed in ArcGIS software. Results showed potential locations for the development of hydro-power facilities in the province of La Union. Potential power generation, capacity and classification was also identified per feature. © 2017 by SCITEPRESS - Science and Technology Publications, Lda. All rights reserved.

Nacional L.M.,Mariano Marcos State University | Kang S.-J.,Gyeongsang National University | Choi B.-D.,Gyeongsang National University
Fisheries and Aquatic Science | Year: 2012

Carotenoids were found in high levels in both muscle and tunic samples, with the highest and lowest values observed in March and January, respectively. The average values in muscle (GM) and tunic (GT) harvested in Geoje were 49.1 mg/100g and 56.7 mg/100g, respectively, whereas those in muscle (TM) and tunic (TT) harvested in Tongyeong were 42.0 mg/100g and 50.2 mg/100g, respectively. The total phenol contents of the tunic were not significantly different (P < 0.05) between sampling area and month. We investigated the antioxidative activities of the carotenoids against linoleic acid peroxidation [1,1-diphenyl-2-picrylhydrazyl (DPPH)] and hydroxyl radicals as well as their reducing power. The DPPH radical scavenging activity was 7.6-13.5% in GM, which is relatively weak, whereas it was 21.1-29.9% in GT, 9.6-12.4% in TM and 19.3-24.1% in TT. In comparison to α-tocopherol, the carotenoids were found to have strong inhibitory effects against linoleic acid peroxidation, and exhibited strong hydroxyl radical scavenging activities and reducing power at 120 μg/mL of each sample. © The Korean Society of Fisheries and Aquatic Science.

Orpia C.B.,Mariano Marcos State University | Mapa D.S.,University of the Philippines | Orpia J.C.,Magat Inc.
Journal of Environmental Management and Tourism | Year: 2014

Wind energy is the fastest growing renewable energy technology. Wind turbines do not produce any form of pollution. Moreover, when strategically positioned the wind turbines blend with the area’s natural landscape. In the long run, the cost of electricity using wind turbines is cheaper than conventional power plants since it does not consume fossil fuel. Wind speed modeling and forecasting are important in the wind energy industry starting from the feasibility stage to actual operation. Forecasting wind speed is vital in the decision-making process related to wind turbine sizes, revenues, maintenance scheduling and actual operational control systems. This paper uses econometric models to forecast the wind speeds of turbines in the Northwind Bangui Bay wind farm located in the Province of IlocosNorte, Philippines, using the Vector Auto Regressive (VAR) model. The explanatory variables used are local wind speed, humidity, temperature and pressure generated from the meteorological station in Laoag City, Province of IlocosNorte, Philippines. The use of VAR model, using daily time series data, reveals that wind speeds of the turbines can be explained by the past wind speed, the wind speed in Laoag City, humidity, temperature and pressure. Results of the analysis, using the forecast error variance decomposition, show that wind speed in Laoag City, temperature and humidity are important determinants of the wind speeds of the turbines. © 2014 ASERS Publishing House. All rights reserved.

Juinio-Menez M.A.,University of the Philippines at Diliman | Bangi H.G.P.,University of the Philippines at Diliman | Bangi H.G.P.,Mariano Marcos State University
Marine Ecology Progress Series | Year: 2010

Experiments were conducted to determine the effects of water conditioned with Sargassum (i.e. fresh and ground Sargassum and excreta of Sargassum-fed Tripneustes gratilla) as well as the effects of adult sea urchins (i.e. Salmacis sphaeroides and T. gratilla), larval age and parentage on the settlement and metamorphic rate of full-sibling batches of T. gratilla larvae. The majority of larvae (35 to 57 d old) settled within the first hour of the assays, but significantly more settled and metamorphosed completely in the conditioned water treatments than in the control (boiled filtered seawater). Completely metamorphosed larvae in the control treatment indicate that specific cues are not necessary to induce settlement and metamorphosis of competent larvae. However, habitat cues enhanced metamorphic rate significantly. Complete metamorphosis occurred earlier in Sargassum treatments, and the number of completely metamorphosed larvae was significantly higher in the ground Sargassum treatment. Observations of early juvenile aggregations on Sargassum further suggest that algal metabolites may enhance benthic recruitment. The sensitivity of sea urchin larvae to waterborne cues differed among larval age groups. Older batches of larvae metamorphosed faster, particularly in the ground Sargassum treatment, while the intermediate age group also had high metamorphic rates in both sea urchin treatments. There were significant differences in metamorphic rate among full sibling batches of larvae of the same age, as well as significant interaction between batch and treatment over time. Results indicate that differences in the age of competent larvae and genetic factors affect the ability of larvae to detect cues to initiate and complete metamorphosis. © Inter-Research 2010, www.int-res.com.

Villanueva R.D.,University of the Philippines at Diliman | Romero J.B.,Mindanao State University | Ragasa A.L.R.,University of the Philippines at Diliman | Ragasa A.L.R.,Mariano Marcos State University | Montano M.N.E.,University of the Philippines at Diliman
Phycological Research | Year: 2010

The worldwide production of the gelling agent agar mainly rely on the red algae of the order Gracilariales and Gelidiales for raw material. We investigate here the potential of a species from another red algal order, Ceramiales as an agar source. The agar from Laurencia flexilis collected in northern Philippines was extracted using native and alkali treatment procedures and the properties of the extracts were determined using chemical, spectroscopic and physical methods. The native agar, 26% dry weight basis, forms a gel with moderate gel strength (200 g cm-2). Alkali-treatment did not enhance the gel strength, indicating insignificant amounts of galactose-6-sulfate residue, the precursor of the gel-forming 3,6-anhydrogalactose (3,6-AG) moieties. Furthermore, the Fourier transform infrared and chemical analysis showed low sulfate and high 3,6-AG levels, not affected significantly by the alkali treatment. Nuclear magnetic resonance spectroscopic analysis revealed 3-linked 6-O-methyl-D-galactose and 4-linked 3,6-anhydro-L-galactose as the major repeating unit of the native extract, with minor sulfation at 4-position of the 3-linked galactose residues. The native and alkali treated agars have comparably high gelling and melting temperatures, whereas the former exhibits higher gel syneresis. Laurencia flexilis could be a good source of agar that possesses physico-chemical and rheological qualities appropriate for food applications. Due to the inability of alkali treatment to enhance the key gel qualities of the native extract, it is recommended that commercial agar extraction from this seaweed would be done without pursuing this widely-used industrial procedure. © 2010 Japanese Society of Phycology.

Madalipay J.C.T.,Mariano Marcos State University
ACRS 2015 - 36th Asian Conference on Remote Sensing: Fostering Resilient Growth in Asia, Proceedings | Year: 2015

The province of Ilocos Norte, known to be an emerging renewable energy capital of the Philippines and the South East Asia, has paved its way in committing to reduce the carbon emission in our atmosphere with the clean generation of electrical energy through hydro power and wind farms with the latest addition of the 4.1-megawatt (MW) solar farm under the wind turbines of the 150-MW Burgos wind farm. Temperature has been a big factor in the production of electricity as it affects devices' efficiency and may lead to significant production loss particularly in harnessing solar energy. This study used Landsat 8 Operational Land Imager (OLI) of 30-m resolution and Thermal Infrared Sensor (TIR) data of 100 m resolution captured from 2014 to present to study the effects of temperature difference on solar power production for standalone photovoltaic (PV) systems and on-grid high powered PV systems. Photovoltaic panels was assumed to have been power tested at 25°C. Vegetation Cover and Normalized Difference Vegetation Index were derived using the optical bands. The two Thermal Infrared (TIR) bands was used to obtain the brightness temperature and land surface temperature. Results showed that production loss was higher in areas of low and no vegetation as temperatures in the area was higher.

Alibuyog N.,Mariano Marcos State University | Comiso J.C.,NASA
ACRS 2015 - 36th Asian Conference on Remote Sensing: Fostering Resilient Growth in Asia, Proceedings | Year: 2015

Satellite remote sensing data are used to study the distribution and estimate the areal coverage of the two most dominant crops, namely, rice and corn, in the Philippines. The EOS/Terra MODIS data were used to assemble a 15-year time series of monthly NDVI data over Northern Philippines at a resolution of 250m. The monthly data were used to investigate seasonal patterns of crops and to derive nine phenological parameters from the distributions of rice and corn in Northern Philippines, which in turn were used in conjunction with a maximum likelihood classifier to discriminate areas planted by rice and corn during the wet and dry seasons. Classification was done in areas that usually have two cropping seasons and where the starts of the planting seasons are consistent with those expected from climatology. The resulting maps show a spatial distribution of corn and rice crops during the wet and dry seasons that are generally plausible and found to be highly correlated and comparable, with some exceptions, to data published by the Bureau of Agricultural Statistics.

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