UPV Digital Repository (UPV–DR)
The official Institutional Repository of the University of the Philippines Visayas (UPV)
UPV–DR serves as the institutional repository and digital archives that preserves and provides access to UPV's academic outputs. It aims to facilitate wider dissemination, increased societal use, and enhanced visibility of UPV faculty members, staff, and students’ researches, creative works, and innovations. It aims to promote UPV’s scholarly and artistic works, enhance collaborations between the academe and the industry, and amplify extension work and public service.
UPV–DR aims to preserve institutional records, permanent records, and university memories. It also aims to provide access to the intellectual outputs of UPV researchers, artists, and innovators, such as publications in journals, books, conference proceedings, theses and dissertations, and artistic works, among others. Access is generally unrestricted and is compliant with the Open Archives Initiative (OAI) protocol.
UPV–DR is managed by the UP Visayas University Library.
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Recent Submissions
Community structure, biomass and carbon stock assessment of mangrove forest in Poblacion, Batan, Batan Bay, Aklan, Philippines
Cagalawan, Donna Novei C. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2013-04)
The continued loss of mangroves in Batan Bay, Aklan and elsewhere in the Philippines warrants urgent attention. Appropriate management schemes can only be drawn after a scientific assessment of the remaining mangroves in a given area. This study aimed to 1.) assess the community structure, of mangroves in Poblacion, Batan, Aklan using accepted ecological indicators such as a.) determine the physical and chemical factors such as salinity, temperature of water and soil, pH as well as substrate characterization; b.) identify and classify true mangrove species present in the area; c.) Stand Basal Area, d.) stems per hectare, e.) relative density, f.) relative frequency, g.) relative dominance, h.) importance value, i.) Shannon Index of Dominance and; 2.) determine biomass and carbon density in the above ground pools of mangroves. A total of nineteen (19) true mangrove species represented by six families were identified in Poblacion, Batan, Aklan. The true mangrove species were Aegiceras corniculatum, Avicennia alba, Avicennia marina, Avicennia officinalis, Avicennia rumphiana, Bruguiera cylindrica, Camptostemon philippenensis, Ceriops decandra, Excoecaria agallocha, Lumnitzera littorea, Nypa fruticans, Osbornia octodanta, Rhizophora apiculata, Rhizophora mucronata, Rhizophora stylosa, Scyphiphora hydrophyllacea, Sonneratia alba, Xylocarpus granatum and Xylocarpus moluccencis. Camptostemon philippenensis had the highest basal area with 103.14 m2/ha and the highest relative dominance with the value of 39.26%. Avicennia marina has the highest stems per hectare in the area with the value of 32, 400. It also recorded the highest average density at 167 trees/ha and was present in all plots with relative frequency of 44.15%. Avicennia marina was the most important species with value of 300.21. Camptostemon philippinensis had the highest seedling density of 586 seedlings per hectare, whereas Avicennia marina had the highest sapling density of 20 saplings per hectare. In terms of biomass, Avicennia marina recorded the greatest biomass at 79.42 tons/ ha and the highest carbon stock of 36.7 tons/ha. A total of 203.87 tons/ha biomass and 91.728 tons/ha carbon stock was determined. Based on the leaf litter fall, Transect 1 has the highest leaf fall at 664.9g.m2. Litter production was highest during November 5, 2012-November 19, 2012 and lowest in December 17, 2012- December 31, 2012 in all three transects.
A study of the gut contents of compressed tubby (Canthigaster compressa) from Talibon, Bohol and Palompon, Leyte, Philippines
Caduada, Laymart A. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2017-06)
The Philippines has one of the longest coastlines and is among the top producers of fisheries products in the world. The industry however is threatened by unsustainable fishing practices and dwindling resources. Proper fisheries management is hindered by an extensive lack of biological information on resource populations. Studying fish feeding habits based on gut content analysis could provide insights on fish feeding patterns and trophic interactions in aquatic food webs and enhance our understanding of exploited resources. The study compares the composition of the gut contents of Canthigaster compressa caught by sled trawl in seagrass beds in Talibon, Bohol and Palompon, Leyte.
Sixty eight specimens from Talibon and 80 from Palompon were examined. Chyme made up 70-76% of the total gut contents in both areas. A total of 23 prey items were observed. Diet composition in Palompon was more diverse as compared to Talibon. Gut contents changed with size/age, with an apparent increase in the proportion of seagrass/algae as fish size increased. This suggests that the tubby shifts to a more herbivorous diet as they grow older. The amount of forams in the guts also decreased with size which could be attributed to a shift in habitat from seagrass to coral reefs. The results also show that crustaceans are more abundant in Palompon than in Talibon which could mean that Palompon has a richer seagrass-associated crustacean population. Further studies about the abundance of crustaceans in the fish diet in Palompon and Talibon is encouraged as it could be useful in assessing the ecological conditions of the areas.
A preliminary study on the average yield of crude capsaicin from common varieties of Capsicum frutescens L. at two stages (Young and mature) using three extracting solvent
Cadornigara, Ma. Sylvia C. (Division of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines Visayas, 1998)
Crude capsaicin content of the air dried and homogenized plant material of the three varieties of Capsicum frutescens L. namely cayenne, tobasco and ‘kitikot’ were determined using diethyl ether, 99.5 % ethanol and 1.0N NaOH as extracting reagents. Statistical analysis showed no significant difference on the average percent yield of crude capsaicin on the three varieties of Capsicum frutescens L. using similar extracting solvent, but a significantly higher yield of crude capsaicin was found with 99.5% ethanol and 1.0N NaOH. Through thin layer chromatography the major components of the extracts identified could probably be capsaicinoids (Rf 15-17), carotenoids (only in 99.5% ethanol, Rf 96-97), and capsanthin (Rf 27-29) using n-hexane-acetone.
Myths and rituals among the Babaylan of Tubungan, Iloilo
Cadiz, Fel T. (Division of Social Sciences, College of Arts and Sciences, University of the Philippines Visayas, 1996-03)
This paper is an exploratory study on myths, an important, genre in folk literature, and their relation to binabaylan in Tubungan, Iloilo. Specifically it aims to identify and discuss myths found in the locale; to describe specific agricultural rituals, beliefs, and practices; to analyze the relationship between agricultural myths and rituals; and lastly, to describe and analyze the function(s) of rituals and myths in the context of binabaylan in Tubungan.
The study discusses six myths namely: Apik and Manampunay, Pinihakang Daraga, the Datu and the Panaet, the seven Bacam jars and the Panaitan, the origin of rice, corn and beans and the origin of rice varieties. These myths are then analyzed to reveal their importance in the binabaylan symbolism and ideology.
The study also discusses seven agricultural rituals, namely: paminhi, patubong, panaet, panudlak, tuos, tuqurabong, and panguyanq. Each ritual is discussed including their accompanying hurabaton (ritual-chant), taboos observed and food being offered.
After examining the relationship between the agricultural rituals and the myths, the paper concludes that not all myths have corresponding rituals. Certain rituals have retained their mythic explanation, some have not. Myths and rituals reveal an orientation about the world and of reality. Through the recitation of myths in rituals, people? learn not only to adjust themselves within the society to which they are? born, but also to match their personal pains and conflicts to those of the? heroes narrated in these stories. In these ways, they gain guidance and, eventually, wisdom.
Roadworks: Traffic light control via computer interfacing
Cadiente, Mark E.; Macanas, Dennis G.; Padernal, Noriel P. (Division of Physical Science and Mathematics, College of Arts and Sciences, University of the Philippines Visayas, 2002-03)
Gathering of information was needed to know the behavior of lights and same as to the way on how to interface hardware using computers. After which, designs and flowcharts were made.
Hardware designs were tested using both software (Electronic Workbench) and actual circuitry using breadboards.
After the hardware was guaranteed to be working properly, it was then interfaced using a computer port, and the main program was developed.
The developed software was successful in controlling the behavior of the lights and receiving data from the sensors. Further improvements was then made to the software to improve its interface and efficiency in controlling the said hardware.