- Coastal wetland ecosystem dynamics
- Evolutionary Game Theory and Cooperation
- Mathematical and Theoretical Epidemiology and Ecology Models
- Evolution and Genetic Dynamics
- Advanced Battery Technologies Research
- Neural dynamics and brain function
- Remote Sensing and LiDAR Applications
- COVID-19 epidemiological studies
- Oil Palm Production and Sustainability
- Theoretical and Computational Physics
- stochastic dynamics and bifurcation
- Landslides and related hazards
- Diffusion and Search Dynamics
- Plant and animal studies
- Neural Networks and Applications
- Advanced Thermodynamics and Statistical Mechanics
- Securities Regulation and Market Practices
- Granular flow and fluidized beds
- Remote Sensing in Agriculture
- Advancements in Battery Materials
- Consumer Market Behavior and Pricing
- Nonlinear Dynamics and Pattern Formation
- Agricultural and Environmental Management
- Coconut Research and Applications
- Leaf Properties and Growth Measurement
University of the Philippines Diliman
2003-2024
Technological Institute of the Philippines
2014-2024
Industrial Technology Institute
2023
Industrial Technology Development Institute
2023
Ateneo de Manila University
2012-2015
University of the Philippines System
2008-2010
Sustainable development goals not only contributes towards a clean environment but also better climatic conditions. Within Asia next to China and India, the Association of Southeast Asian Nations (ASEAN) are actively developing countries in terms economy technologies. On verge achieving development, ASEAN highly depend on fossil fuels for their energy needs. The have taken visionary steps increasing renewable mix with conventional grid without hampering ongoing development; this study...
Understanding rainforest habitats are made difficult by accessibility, the density of foliage, and coverage; yet it is vital for ecologist conservationists to understand variety diversity these ecosystems. An airborne light detection ranging (LiDAR) technology has carried a breakthrough in acquisition management forest data specifically on aspect inventory. LiDAR can accurately measure tree-level features such as tree elevation, crown dimension well derivative estimates trunk diameter...
We examine avalanche statistics of rain‐ and vibration‐driven granular slides in miniature sand mounds. A crossover from power‐law to non avalanche‐size is demonstrated as a generic driving rate ν increased. For slowly‐driven mounds, the tail distribution with exponent −1.97 ± 0.31, reasonably close value previously reported for landslide volumes. The interevent occurrence times are also analyzed mounds; its exhibits −2.670 0.001.
Typhoons cause damage to mangrove ecosystems, hampering their delivery of ecosystem goods and services, including coastal protection. We examined the vegetation resistance (VR) seedling regeneration potential (SRP) three genera: Rhizophora, Sonneratia Avicennia at seafront areas. assessed genus-specific recovery from impacts Typhoon Haiyan, by far strongest storm make landfall in recorded history. VR was estimated using density, tree height diameter breast (DBH). SRP measured as...
We developed a spatially explicit individual-based model of forest development trajectories monospecific Rhizophora mucronata plantations. The incorporates stochastic initial seedling spacing, propagule dispersal, recruitment, and mortality. simulated compared the growth, accumulation carbon stocks restored mangroves between optimal sub-optimal settings. Salinity is considered as stressor, while flooding effects are described an inundation stress factor. In setting, mangrove population...
Animal and human clusters are complex adaptive systems many organize in cluster sizes $s$ that obey the frequency distribution $D(s)\ensuremath{\propto}{s}^{\ensuremath{-}\ensuremath{\tau}}$. The exponent $\ensuremath{\tau}$ describes relative abundance of a given system. Data analyses reveal real-world exhibit broad spectrum values, 0.7 (tuna fish schools) $\ensuremath{\leqslant}\ensuremath{\tau}\ensuremath{\leqslant}4.61$ (T4 bacteriophage gene family sizes). Allelomimesis is proposed as...
A non-conservative critical branching model is proposed to demonstrate that self-organized criticality (SOC) can occur in mean-field sandpiles violate a conservation law. The state characterized by avalanche sizes and lifetimes obey an inverse power-law distribution with exponents τS = 3/2 τT 2, respectively. Criticality achieved when the process coupled background activity spontaneous switching between refractoriness quiescence among system components. stationary of analysed mathematically...
We establish a general framework that explains how leaky, dissipative systems, such as neuronal networks (NN), can exhibit robust self-organized criticality (SOC). Consistent with recent experiments, we propose persistent membrane potential fluctuations allow NNs to transform from sub-critical critical state. Our results also account for the tendency in small tip towards an epileptiform state (the case of largely synchronized neurons) when background activity is strong.
A diverse, asynchronous swarm consisting of N mobile, attractive-repulsive particles evolves inside a two-dimensional confinement. Each particle k is characterized by preferred neighboring distance ρk determined from truncated normal distribution mean and standard deviation σρ, for 0⩽ρ<∞. Pairwise interaction either attractive or repulsive depending on whether the between two greater less than ρk. The forms self-organized metastable patterns as adjust their positions via random evolution. An...
We study a locally nonconservative self-organized branching process (SOBP) in an open system of excitable agents exhibiting spontaneous excitation and deexcitation. The SOBP achieves criticality even the absence energy conservation as population relaxes to stable state with no overexcited agent. Criticality is widely thought happen only conservative SOBP. Our model explains observed characteristic size distribution tuna fish schools neuronal avalanches cortical networks.
This paper is directed towards the enhancement of marker-controlled watershed algorithm in estimating crown diameter mangrove Philippines. In this study, an experimental design that uses segmenting trees and measures it's from extracted region was implemented. The study aims to explore performance terms discriminating Rhizophora with other non-mangrove, its accuracy airborne LiDAR data. part goal Technological Institute Philippines MRSUAVE team developing a process method support protection...
Mangroves are a tropical and sub-tropical dominant ecosystem that flourishes in the coastal areas of Philippines offer both ecological economic benefits for communities. However, even with its benefits, forest cover has experienced substantial damages mangrove species critically approaching extinctions. With this implications, mapping is an important aid to environmental policies processes will contribute resources protection preservation. This study aimed produce rhizophora-specific map...
The lead–acid battery is still widely used today and will continue to be one of the benchmarks for diverse scenarios applications. Although their energy densities are lower than more modern chemistries, economic advantages batteries outweigh disadvantages numerous applications in transportation stationary markets, uninterruptible power supply, storage wind or solar-based renewable systems. Nevertheless, optimizing utility requires continuous assessment state health (SoH). existing SoH...
Mangrove forest is one of the most essential types in Philippines. Although they cover country for about 256185 hectares, play a vital role ecosystem. However, mangroves have faced widespread destruction throughout past century. With more than 90% worlds, are located developing countries like Philippines and with rapid development urbanization, these forests threatened to be destroyed at an alarming rate. this, there critical need continuously monitor assess them dynamic conservation,...
We propose an analytic model of the Brazilian nut effect (BNE) that utilizes void filling as primary mechanism behind rise to surface one large buried intruder particle in externally driven confined mixture with many small particles. When rises upward, it creates a underneath is immediately filled by particles preventing from sinking back its previous position. Even though external driving only along vertical direction, are able move transversely into due Janssen effect, which postulates...
GENERAL COMMENTARY article Front. Earth Sci., 05 February 2016Sec. Quaternary Science, Geomorphology and Paleoenvironment Volume 4 - 2016 | https://doi.org/10.3389/feart.2016.00011
Epidemics have been known to persist in the form of recurrence cycles. Despite intervention efforts through vaccination and targeted social distancing, infectious diseases like influenza continue appear intermittently over time. I undertaken an analysis a stochastic epidemic model explore hypothesis that actually drive Time series from simulations reveal oscillations exhibiting similar temporal signature as epidemics. The power-spectral density indicates resonant frequency, which...
Coconut farming in the Philippines often needs help with challenges efficient tree monitoring, directly affecting its productivity and sustainability. Although prevalent, traditional methodologies, such as field surveys, exhibit labor intensiveness potential data inaccuracy constraints. This study sought to leverage capabilities of YOLOv7 object detection algorithm enhance coconut monitoring. Our objectives centered on (1) precise trees using orthophotos, (2) their enumeration, (3)...
In general, methods that use a data-driven approach in estimating lead-acid batteries’ State of Health (SoH) rely on measuring variables such as impedance, voltage, current, battery’s life cycle, and temperature. However, these only provide limited information about internal changes the battery often require sensors for accurate measurements. This study explores ultrasonic wave propagation within cell element to gather data proposes classifying SoH. The results demonstrate neural network...