Aurora State College of Technology

ascot.edu.ph
Baler, Philippines

The Aurora State College of Technology is a public college in the Philippines. It is mandated to provide technical and professional training in the science, arts, teacher education, agriculture, engineering and technology and short-term vocational courses. It is also mandated to promote research, advanced studies and academic leadership in its areas of specialization. Its main campus is located in Baler, Aurora. Wikipedia.

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Anabieza M.,Pamana Ka Sa Pilipinas | Pajaro M.,Daluhay | Reyes G.,Pamana Ka Sa Pilipinas | Tiburcio F.,Pamana Ka Sa Pilipinas | Watts P.,Aurora State College of Technology
EcoHealth | Year: 2010

Pamana Ka Sa Pilipinas (Pamana) is a grassroots fisherfolk alliance of Philippine Marine Protected Areas with more than 6,000 individual fisherfolk and their 30,000 family members. Access to food, education, and health services for Philippine fisherfolk families is directly dependant upon the fish harvest and related health of the marine environment. Pamana represents a unique "ecohealth" strategy, linking the health of coastal people and that of their surrounding marine ecosystem. Pamana's activities are viewed by both their membership and barangay (village) health workers as a contribution to nutritional and community health. The alliance has developed an approach to the empowerment of fisherfolk that has led to improvement in health, food security, and nutritional status of their communities. The development of Pamana provides a model for building capacity in other fishing- and resource-based cultures, through engagement and empowerment. In less developed countries, grassroots initiatives, such as Pamana, may be the only solution for sustainable fisheries contributions to food security, given the challenges of fisherfolk poverty, environmental degradation, and limited finances. © 2010 International Association for Ecology and Health.


Gorospe A.,Andong National University | Gorospe A.,Aurora State College of Technology | Nisay A.,Andong National University | Dizon J.R.,Andong National University | And 2 more authors.
Physica C: Superconductivity and its Applications | Year: 2013

The electromechanical property behaviour of 2G coated conductor (CC) tapes fabricated by multi-layer deposition process both in the in-plane and transverse direction should be understood. The CC tapes are used in the fabrication of epoxy resin-impregnated coils. In such case, the Lorentz force due to the high magnetic field applied as well as the thermal stress due to the difference in coefficient of thermal expansion (CTE) among constituent layers during cooling to cryogenic temperature will induce transversely applied load to the surface of CC tapes in coils. Hence, the CC tape should have a good mechanical property in the transverse direction in order to maintain its superior performance under magnetic field. In this study, a test frame which gives precisely aligned transverse load was devised. Using the fixture, the delamination behaviours including the delamination strength of the GdBCO CC tapes under transverse tensile loading were investigated. Large variation on the delamination strength of the CC tapes was recorded and might have resulted from the slit edge effect and the inhomogeneity of the CC tapes. The Ic degradation behaviour under transverse load was related to the location where delamination occurred in the sample. © 2013 Elsevier B.V. All rights reserved.


Noguchi N.,Hokkaido University | Barawid Jr. O.C.,Aurora State College of Technology
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2011

The objective of the research is to develop a robot farming system using multiple robots. The research will discuss the application of multiple robots in Japan agriculture for rice, wheat and soybean. The robot farming system includes a rice planting robot, a seeding robot, a robot tractor, a combine robot harvester and various implements attached on the robot tractor. One of the key elements of the robot farming system is that it should be more economical to the farmers. The important parts of the farming system are the robot management system, low-cost system, robot farming safety, and real-time monitoring/documentation. Keywords: multiple robots, robotics, robot farming system, robot tractors, robot management system, low-cost system. © 2011 IFAC.


Gorospe A.,Andong National University | Gorospe A.,Aurora State College of Technology | Bautista Z.,Andong National University | Shin H.-S.,Andong National University
Superconductor Science and Technology | Year: 2016

Coated conductor (CC) tapes utilized in high-current-density superconducting cables are commonly subjected to different loading modes, primarily torsion and tension especially in the case of twisted stacked-tape cable. Torsion load can occur due to twisting along the length or when winding the CC tapes around a former, while tension load can occur due to pre-tension when coiled and as a hoop stress when the coil is energized. In this study, electromechanical properties of single CC tapes under torsion load were investigated using a new test apparatus. The results could provide basic information for cable designers to fully characterize stacked cables. Copper-electroplated and brass-laminated CC tapes fabricated with different deposition techniques were subjected to pure torsion and combined tension-torsion loading. The critical current, I c degradation behaviours of CC tapes under torsional deformation were examined. Also, the effect of further external lamination on the I c degradation behaviour of the CC tapes under such loading conditions was investigated. In the case of the combined tension-torsion test, short samples were subjected to twist pitches of 200 mm and 100 mm. Critical parameters including reversible axial stress and strain in such twist pitch conditions were also investigated. © 2016 IOP Publishing Ltd.


Shin H.-S.,Andong National University | Gorospe A.,Andong National University | Gorospe A.,Aurora State College of Technology
Superconductor Science and Technology | Year: 2014

Recent problems in superconducting devices operating at the high magnetic field regime include the possibility of substantial critical current, I c, degradation due to the delamination of the coated conductor (CC) tapes. The delamination may originate from excessive tensile radial stress and cleavage stress developed due to epoxy curing, cool-down and Lorentz force generated. Therefore, it is necessary to investigate the Ic response under transverse loading and the delamination behaviour in REBCO CC tapes to predict its performance in practical device applications. In this study, using the anvil test method, the delamination strength and the transverse tensile stress response of Ic in GdBCO CC tapes were investigated. Under transverse tensile stress, the Ic degradation in GdBCO CC tapes showed both abrupt and gradual behaviours. A reversible Ic degradation behaviour was also observed which was similar to the case under uniaxial tension. The electro-mechanical and mechanical delamination strengths were determined, wherein both increased when a smaller-sized anvil was used during the delamination test. The electro-mechanical delamination strength was approximately half of the mechanical delamination strength in the GdBCO CC tapes tested. Four delamination modes were observed and well correlated with electro-mechanical delamination strength and Ic degradation behaviour. Lastly, delamination sites within the CC tapes were also correlated with the Ic degradation behaviour that had been observed. © 2014 IOP Publishing Ltd.


Gorospe A.B.,Andong National University | Gorospe A.B.,Aurora State College of Technology | Shin H.-S.,Andong National University
Progress in Superconductivity and Cryogenics (PSAC) | Year: 2014

REBCO coated conductor (CC) tapes with superior mechanical and electromechanical properties are preferable in applications such as superconducting coils and magnets. The CC tapes should withstand factors that can affect their performance during fabrication and operation of its applications. In coil applications, CC tapes experience different mechanical constraints such as tensile or compressive stresses. Recently, the critical current (Ic) degradation of CC tapes used in coil applications due to delamination were already reported. Thermal cycling, coefficient of thermal expansion mismatch among constituent layers, screening current, etc. can induce excessive transverse tensile stresses that might lead to the degradation of Ic in the CC tapes. Also, CC tapes might be subjected to very high magnetic fields that induce strong Lorentz force which possibly affects its performance in coil applications. Hence, investigation on the delamination mechanism of the CC tapes is very important in coiling, cooling, operation and design of prospect applications. In this study, the electromechanical properties of REBCO CC tapes fabricated by reactive co-evaporation by deposition and reaction (RCE-DR) under transversely applied loading were investigated. Delamination strength of the CC tape was determined using the anvil test. The Ic degraded earlier under transverse tensile stress as compared to that under compressive one. © 2014 Korea Institute of Applied Superconductivity and Cryogenics. All rights reserved.


Gorospe A.,Andong National University | Gorospe A.,Aurora State College of Technology | Dedicatoria M.J.,Andong National University | Shin H.-S.,Andong National University
IEEE Transactions on Applied Superconductivity | Year: 2016

In wet-wound epoxy impregnated coils, the whole coated conductor (CC) tape structure experiences radial/transverse tensile stress due to large Lorentz force, which might induce delamination damage and in turn affects its transport performance during operation. The characterization of the delamination strength of CC tapes is therefore necessary for such practical applications. The anvil testing method was done to characterize the mechanical properties of REBCO CC tapes considering the possible transverse tensile stress condition in CC tape windings in coil applications. The delamination strength of three different CC tape samples slit from a 12-mm-wide one was determined using two different sized upper Cu anvils. It was observed that the slitting process has resulted to different CC tape edge geometries such as burrs and filleted corners of the substrate layer. As a result, significantly lower mechanical delamination strength was exhibited by the CC tapes when their whole width was covered by the upper anvil. Using the wide upper anvil, the edge geometry such as burrs and thick stabilizing layer played an important role on the delamination damage of the CC tape. Using a statistical method, the intrinsic strength of the CC tapes was distinguished from those that were affected by poor soldering, misalignment, and other external factors during the tests. Delamination sites mainly occurred within the REBCO film and on the buffer/REBCO interface. Finally, delamination schematics were drawn based on the delaminated CC tape's morphology. © 2002-2011 IEEE.


Gorospe A.,Andong National University | Gorospe A.,Aurora State College of Technology | Dedicatoria M.J.,Andong National University | Shin H.-S.,Andong National University
IEEE Transactions on Applied Superconductivity | Year: 2015

Superior characteristics and great potential of coated conductor (CC) tapes are some of the promises in pursuit of energy efficient application in electrical field. However, in electric device applications, the coefficient of thermal expansion (CTE) mismatch of each constituent layer, screening current, excessive radial tensile stresses during operation, and other coil fabrication related reasons might cause delamination damage in CC tapes. It was reported that the delamination among its constituent layers resulted to the degradation of its electromechanical properties on coil application. Therefore, the investigation on its delamination behavior is necessary for device application design. In this study, using the anvil test method, the delamination behaviors in 12-mm-wide Cu stabilized and brass laminated GdBa2Cu3Oy CC tapes with stainless steel substrate were investigated. The mechanical delamination strength of the CC tapes for differently assembled upper anvil and CC tape configurations about widthwise direction was investigated by using a 4 mm × 8 mm size upper anvil. Mechanical delamination strength of the CC tape was not enhanced by the addition of brass laminate and showed no significant difference depending on the superconducting side or the substrate side. Furthermore, both CC tapes exhibited similar delamination mechanisms and sites but showed different fracture morphologies. © 2002-2011 IEEE.


Gorospe A.,Andong National University | Gorospe A.,Aurora State College of Technology | Nisay A.,Andong National University | Shin H.-S.,Andong National University
Physica C: Superconductivity and its Applications | Year: 2014

Laminated HTS coated conductor (CC) tapes having a unique multi-layer structure made them vulnerable when exposed to transverse loading. Electromechanical transport properties of these CC tapes can be affected by excessive transverse stresses. Due to the coefficient of thermal expansion (CTE) mismatch and incompatibility among constituent materials used in coil applications, delamination among layers occurs and causes critical current, Ic degradation in the CC tapes. In this study, the delamination behaviors in copper (Cu) solder-laminated CC tapes by soldering and surround Cu-stabilized ones by electroplating under transverse tension loading were investigated. Similarly to the surround Cu-stabilized CC tapes in our previous reports, the Cu solder-laminated CC tapes also showed an abrupt and gradual Ic degradation behavior. However, the Cu solder-laminated CC tapes showed different delamination morphologies as compared to the surround Cu-stabilized CC tapes; the superconducting side and the substrate side of the Cu solder laminated CC tapes were totally separated by delamination. On the other hand, the brass laminate did not show any significant effect on the delamination strength when it is added upon the surround Cu-stabilized CC tapes. © 2014 Elsevier B.V. All rights reserved.


Shin H.-S.,Andong National University | Gorospe A.B.,Andong National University | Gorospe A.B.,Aurora State College of Technology | Dedicatoria M.J.,Andong National University
Review of Scientific Instruments | Year: 2015

In coated conductor (CC) tapes used in magnet and coil applications, delamination due to excessive transverse tensile stresses is still one of the major issues that need considerations. Recently, several methods in evaluating the delamination strength of CC tapes are being used. In the case of anvil test, size of the anvils will be an important factor considering its applications (i.e., superconducting coil impregnation). In this study, delamination strength of CC tape was examined using different upper anvil sizes and their effects were discussed. Finally, reasonable sizes of upper anvil to be used were proposed considering the application conditions. © 2015 AIP Publishing LLC.

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