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Articles 1531 - 1560 of 1876
Full-Text Articles in Physical Sciences and Mathematics
Plastic Waste Utilization As Macro Fiber In Concrete, Artid Poonyakan
Plastic Waste Utilization As Macro Fiber In Concrete, Artid Poonyakan
Chulalongkorn University Theses and Dissertations (Chula ETD)
The use of plastics has increased over the years, thus resulting in a large volume of plastic waste being generated and accumulated in the environment. Due to its non-biodegradability and persistence, recycling processes have become one of the sustainable solutions for preventing environmental deterioration. Plastic wastes, including high density polyethylene (HDPE), low density polyethylene (LDPE), polypropylene (PP), and polyethylene terephthalate (PET), were collected from industrial sector and used as additional ingredients (macro fiber) to improve mortar properties. Prior to mortar processing, an increase in wettability of plastic fibers using nonionic surfactant, Dehydol LS-12, was investigated. At the optimal concentration of …
Health Risk Assessment Of Inhalation And Dermal Exposure To Particle-Bound Polycyclic Aromatic Hydrocarbons Of E-Waste Dismantling Workers In Buriram Province, Thailand, Sarasanant Bungadaeng
Health Risk Assessment Of Inhalation And Dermal Exposure To Particle-Bound Polycyclic Aromatic Hydrocarbons Of E-Waste Dismantling Workers In Buriram Province, Thailand, Sarasanant Bungadaeng
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research mainly studied on the inhalation and dermal exposure concentrations of particle-bound polycyclic aromatic hydrocarbon (PAHs) that e-waste burning workers probably received during their work and further estimated the health risk assessment in both route of exposure. According to the obtained results, the total concentrations of PAHs on PM₂.₅-₁₀ ranged from 0.0703 to 20.9800 μg/m³. For PM₂.₅, the total concentrations of PAHs varied from 0.2669 to 89.9645 μg/m³. In the dermal dust samples, the total concentrations of PAHs on the particles before burning work ranged from 8.1072 to 253.6118 mg/kg with the average concentration at 95.3894 mg/kg. For the …
System Dynamics Analysis On Municipal Solid Waste Management Under Flooding : Case Study Bangkok, Thailand, Nuchcha Phonphoton
System Dynamics Analysis On Municipal Solid Waste Management Under Flooding : Case Study Bangkok, Thailand, Nuchcha Phonphoton
Chulalongkorn University Theses and Dissertations (Chula ETD)
The municipal solid waste management service system has been one of the key service provisions to indicate the sustainability of the city as defined in Sustainable Development Goals - SDGs #11. Complex linkages of stock and flow within the system are impacted by waste quantities and spatial characteristics. The complex characteristics make it difficult to design a sustainable management system, particularly in case of a disaster. Flooding is a major natural disaster in many regions of the world and poses a challenge as an external disturbance that can affect any part of the waste management system. Flood mitigation plans are …
Conversion Of Waste Chicken Fat To Liquid Fuel On Coal Fly Ash Catalyst By Catalytic Cracking, Phorndranrat Suchamalawong
Conversion Of Waste Chicken Fat To Liquid Fuel On Coal Fly Ash Catalyst By Catalytic Cracking, Phorndranrat Suchamalawong
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this research work, a study on the catalytic cracking of waste chicken fat (WCF) on fly ash to liquid fuels and using 2k factorial design to determine the influence of parameters on liquid yield, naphtha and diesel content was investigated. The research was divided into 2 parts. First, the experiment was carried out in a batch lab scale reactor of 70 mL. The objectives are to determine the influence of parameters that affected the %yield of liquid product naphtha and diesel–liked fuels at the operating conditions of temperature range of 420 - 460 ˚C, reaction time 45-75 minutes, initial …
Ecological Impacts Of Fishing Gears In Ko Chang, Trat Province, Thailand, Wichin Suebpala
Ecological Impacts Of Fishing Gears In Ko Chang, Trat Province, Thailand, Wichin Suebpala
Chulalongkorn University Theses and Dissertations (Chula ETD)
Knowledge of ecological impacts of fishing, especially in small-scale sector, is not always readily available, making it difficult to employ an ecosystem-based approach to fisheries management and to achieve sustainability. The topic of this dissertation was formulated with the aim to enhance this knowledge through conducting researches in Mu Ko Chang, Trat Province, the Eastern Gulf of Thailand. This study focuses on two main types of impacts, i.e. bycatch and habitat damages, consisting of three research modules: 1) assessing existing knowledge and analyzing the knowledge gap regarding bycatch and habitat impacts of fishing methods in Thai waters; 2) investigating fishing …
Seismic Characteristics Of Paleo-Pockmarks At Great South Basin, New Zealand, Arunee Karaket
Seismic Characteristics Of Paleo-Pockmarks At Great South Basin, New Zealand, Arunee Karaket
Chulalongkorn University Theses and Dissertations (Chula ETD)
Paleo-pockmarks and present-day pockmarks are founded in several varieties both onshore and offshore worldwide. These features can be used as an indicator of fluid flow process which expulses through an unconsolidated sediment within the basin. The Great South Basin, New Zealand is one of the basins that paleo-pockmarks are observed covering the southeast offshore of South Island at around 1.5 s (TWT) depth beneath the surface. This study aims to identify seismic characteristics of paleo-pockmarks in the Great South Basin and predict the possible fluid origins and their mechanism. The numerous paleo-pockmarks are identified and imaged by using 3D seismic …
The Influence Of Geological Structure On Stratigraphic Development During Multiphase Rifting In The Songkhla Basin, Gulf Of Thailand, Jidapa Phoosongsee
The Influence Of Geological Structure On Stratigraphic Development During Multiphase Rifting In The Songkhla Basin, Gulf Of Thailand, Jidapa Phoosongsee
Chulalongkorn University Theses and Dissertations (Chula ETD)
The Cenozoic N-S trending Songkhla rift basin, located in the southwest Gulf of Thailand, was developed as a predominantly orthogonal extended half graben structure. The half graben is controlled by a boundary fault zone on the western side of the basin, which forms a series of N-S to NNE-SSW, east-dipping normal faults. The rift spans two phases of rifting; the Eocene-Oligocene and the Oligocene-Miocene phases, the late syn-rift to post-rift transition occurred from the late Early Miocene to Middle Miocene. The main clastic hydrocarbon reservoirs in the basin are located in the Early Miocene to Middle Miocene section. These reservoirs …
Influences Of Geologic Conditions And Anthropogenic Activities On Changes Of Geomorphology And Sediment Load Characteristics Of The Ping And Chao Phraya Rivers, Nikhom Chaiwongsaen
Influences Of Geologic Conditions And Anthropogenic Activities On Changes Of Geomorphology And Sediment Load Characteristics Of The Ping And Chao Phraya Rivers, Nikhom Chaiwongsaen
Chulalongkorn University Theses and Dissertations (Chula ETD)
The Chao Phraya River flows into the largest river basin of Thailand. The Ping River is one of its the major upstream branches flowing down slope southwardly, joining the Chao Phraya River in the central plain and ends at the Gulf of Thailand. The sand-choked is extensively observed and the flood overflow occurs frequently and rapidly at the Lower Ping River. In contrary, the Chao Phraya River, the erosion of river bank and shoreline around the river mouth has been spatially increasing in place. The Landsat imageries taken in 1987, 1997, 2007 and 2017 were used to analyze geomorphological changes …
Aftershock Analysis In The Mainland Southeast Asia, Premwadee Traitangwong
Aftershock Analysis In The Mainland Southeast Asia, Premwadee Traitangwong
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this study, the characteristics of the aftershock in the mainland Southeast Asia (MSEA) were investigated using the several seismological techniques, i.e., i) the Gutenberg-Richter relationship (G-R relationship) ii) the modified Omori's law iii) the Bath's law and iv) the fractal dimension. After declustering, 1,697 clusters during 1985-2017, which represent the aftershocks occurring after mainshock were investigated in 13 seismic source zones recognized in the MSEA. According to the Bath's law, the maximum magnitude of the aftershock depends on the magnitude of the mainshock, with the difference value between 0.4-2.5. In the intraplate zone, it is less than in the …
Mineral Inclusions In Ruby And Sapphire From Bo Welu And Bo Rai Deposits, Eastern Thailand, Supparat Promwongnan
Mineral Inclusions In Ruby And Sapphire From Bo Welu And Bo Rai Deposits, Eastern Thailand, Supparat Promwongnan
Chulalongkorn University Theses and Dissertations (Chula ETD)
Corundum deposits located in several places around the world which appear to have different genesis models. The origins of corundum can be distinguished by mineral inclusions. In this study, most of the rough gem corundum from Bo Rai deposit, Trat Province, and Bo Welu deposit, Chanthaburi Province, in Eastern Thailand show etched or dissolved surfaces that were resulted from dissolution by hot basaltic magma during transportation to the surface. Moreover, these gem corundums also show absorption spectral characteristics related to trace elements which typical for corundum from this area. Corundums from Bo Rai deposit in Trat Province, and from Bo …
Crude Oil Removal By Sphingobium Sp. Mo2-4 And Bacillus Megaterium Tl01-2 Immobilized On Aquaporous Gel, Adisan Rungsihiranrut
Crude Oil Removal By Sphingobium Sp. Mo2-4 And Bacillus Megaterium Tl01-2 Immobilized On Aquaporous Gel, Adisan Rungsihiranrut
Chulalongkorn University Theses and Dissertations (Chula ETD)
Petroleum products are the major energy sources that drive global economy. The exploration and exploitation of crude petroleum oil increase the potential risk for oil spills in marine ecosystem. In this work, two non-pathogenic sponge-associated bacteria were developed as immobilized bacterial co-culture for crude oil removal from seawater. Two bacteria were Spingobium sp. MO2-4 that could degrade crude oil, diesel oil, and fuel oil, and Bacillus megaterium TL01-2 that could degrade crude oil, possessed high cell surface hydrophobicity, could tolerate heavy metal, and was able to form biofilm.. The modified polyurethane foam, aquaporous gel (AQ), was used as carrier for …
Diesel Removal Efficiency In Soil Washing Process By Mixed Solution Of Nonionic Surfactant And Biosurfactant, Pajaree Boonyathai
Diesel Removal Efficiency In Soil Washing Process By Mixed Solution Of Nonionic Surfactant And Biosurfactant, Pajaree Boonyathai
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this study, Tween 80 and three biosurfactant (Rhamnolipid, Saponin and Lipopeptide) were mixed to formulate the appropriate surfactant solution for diesel removal from contaminated soil by washing process. The mixed surfactant system was fixed at 5% w/v of active surfactants concentration in total with different mass ratio of Tween 80 to biosurfactant at 9:1, 8:2 and 7:3 of total concentration. The critical micelle concentration (CMC) of various ratio surfactant mixtures and their interfacial tension (IFT) with diesel were determined and compared with their individual surfactant. The results illustrate that mixed Tween and Lipopeptide at 9:1 mass ratio had the …
Formulation Of Oil Dispersants By Mixing Lipopeptide Biosurfactant And Non-Ionic Surfactants, Parisarin Nawavimarn
Formulation Of Oil Dispersants By Mixing Lipopeptide Biosurfactant And Non-Ionic Surfactants, Parisarin Nawavimarn
Chulalongkorn University Theses and Dissertations (Chula ETD)
Marine oil spill can cause various harmful impacts to the environment. To solve this problem, dispersant is usually applied to enhance petroleum remediation in seawater. The commercial dispersants mostly contain surfactant and solvent that can be toxic to marine lives. This study aimed to formulate solvent-free biosurfactant-based dispersants by mixing lipopeptides from Bacillus subtilis GY19 with fatty alcohol ethoxylate (Dehydol LS7TH), a low toxicity nonionic surfactant. Hydrophilic-lipophilic deviation (HLD) concept was applied. The fractions of lipopeptide and dehydol LS7TH were determined based on the equivalent alkane carbon number (EACN) of hydrocarbons under seawater salinity (34ppt). The molar fractions of lipoppeptide …
Pm10 And Pm2.5 Concentrations In Bangkok Over 10 Years And Implications For Air Quality, Tin Thongthammachart
Pm10 And Pm2.5 Concentrations In Bangkok Over 10 Years And Implications For Air Quality, Tin Thongthammachart
Chulalongkorn University Theses and Dissertations (Chula ETD)
Atmospheric particulate matter particles with a diameter less than 10 micron (PM10) and less than 2.5 micron (PM2.5) have been adverse human health effect. Ambient air pollution data in Central Business District (CBD) of Bangkok monitored by Pollution Control Department and Bangkok Metropolitan Administration were collected over ten years in Bangkok from 2008 to 2017. Trend of the particulate matter concentrations data were investigated over ten year for implications of activities related to air pollution. Daily average air pollution data between year 2015 and year 2017 were used as the dependent variables to develop mathematic models with multiple linear regression …
Cyclic Clique Decompositions Of Powerof Cycles, Apiwat Peereeyaphat
Cyclic Clique Decompositions Of Powerof Cycles, Apiwat Peereeyaphat
Chulalongkorn University Theses and Dissertations (Chula ETD)
A clique decomposition P of a graph G is a collection of cliques of G such that each edge of G belongs to exactly one clique in the collection. We say that P is cyclic if there is an isomorphism : V (G)→ V (G) such that Kk{α (v₁), α (v₂), α (v₃), ... , α (vk)g is a clique in P whenever Kk{v₁; v₂; v₃; :::; vk} is. The k-power of an n-cycle, Ck n, is the graph having the same vertex set as Cn and uv is an edge in Ck n if and only if dCn(u; v) …
Defective Colorings On Complete Bipartite And Multipartite K-Uniform Hypergraphs, Artchariya Muaengwaeng
Defective Colorings On Complete Bipartite And Multipartite K-Uniform Hypergraphs, Artchariya Muaengwaeng
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this thesis, we modify the definition of a defective coloring and a defective chromatic number on graphs to a defective coloring and a defective chromatic number on hypergraphs. First, we find the defective chromatic number on a complete bipartite k-uniform hypergraph and the defective chromatic number on a complete bipartite k-uniform hypergraph of which each color class is acyclic. Second, we determine the defective chromatic number and the defective chromatic number of which each color class is acyclic on a complete k-partite k-uniform hypergraph whose each edge has k vertices from k different partite sets. Finally, we determine the …
Critical Exponent For Nonlinear Nonlocal Equations, Auttawich Manui
Critical Exponent For Nonlinear Nonlocal Equations, Auttawich Manui
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this thesis, we study the nonlinear nonlocal equation ∂t u=J*u-u+u¹+p where p>0 and J is nonnegative, bounded, and radially symmetric with unit integral. The Fourier transform of J satisfies J ̂(ξ)=1-A|ξ|^β (ln1/|ξ| 〗 )^μ+o(〖|ξ|〗^β (ln〖1/(|ξ|)〗 )^μ ) as ξ→0, for 0<β≤2, μ∈R, and A>0. In this study, we establish the local existence, uniqueness, and the comparison principle of solutions. Furthermore, we show that the Fujita critical exponent for this equation is β/n when μ<0. For the case μ>1, we discover that the critical exponent is β/n , and the solutions belong to the global to the small initial data regime.
Streaming Data Classification Method Using Scalable Hyper-Ellipsoids With Linear Discriminant Projection Distance Ratio, Perasut Rungcharassang
Streaming Data Classification Method Using Scalable Hyper-Ellipsoids With Linear Discriminant Projection Distance Ratio, Perasut Rungcharassang
Chulalongkorn University Theses and Dissertations (Chula ETD)
Learning streaming data with limited size of memory storage becomes an interesting problem. Although there have been several learning methods recently proposed, based on the interesting concept of discard-after-learn, the performance of these issues: the learning speed, number of redundant neurons, and classification accuracy of these methods can be further improved in terms of faster speed, less number of neurons, and higher accuracy. The following new four concepts and approaches were proposed in this dissertation: (1) a more generic structure of hyper-ellipsoidal function called Scalable Hyper-Ellipsoidal Function (SHEF) capable of handling the problem of curse of dimensionality by introducing a …
Generalized Symplectic Graphs And Generalized Orthogonal Graphs Over Finite Commutative Rings, Siripong Sirisuk
Generalized Symplectic Graphs And Generalized Orthogonal Graphs Over Finite Commutative Rings, Siripong Sirisuk
Chulalongkorn University Theses and Dissertations (Chula ETD)
Let R be a finite commutative ring with identity, n ∈ N and β a bilinear form on Rⁿ. In this dissertation, we count the numbers of free submodules and totally isotropic free submodules of Rⁿ of rank s by using the lifting idea. We define the generalized bilinear form graph whose vertex set is the set of totally isotropic free submodules of Rⁿ of rank s and the adjacency condition is given by some rank conditions. We study this graph when (Rⁿ, β) is a symplectic space and an orthogonal space. We can determine the degree of each vertex …
Variant Of D'Alembert Functional Equation On Compact Homogeneous Space, Sorawit Viwanthananut
Variant Of D'Alembert Functional Equation On Compact Homogeneous Space, Sorawit Viwanthananut
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this work, we introduce a new functional equation on compact homogeneous spaces based on the d'Alembert functional equation on compact groups. We solve the functional equation by using tools from harmonic analysis.
Sustained Release Of Antibiotics From Bone Spacer, Miranda Oungeun
Sustained Release Of Antibiotics From Bone Spacer, Miranda Oungeun
Chulalongkorn University Theses and Dissertations (Chula ETD)
Bone spacer is a device developed to temporarily insert into the body to treat infected tissue caused by bone replacement. Burst release and short-time release of antibiotics from bone spacer not only limits their ability to clear infection but also causes tissue inflammation. Therefore, here we have fabricated bone spacers containing antibiotic-loaded particles, studied their antibiotic release character, and measured the compressive strength of PMMA cements. Four biocompatible particles were investigated. Vancomycin and erythromycin were used as hydrophilic and hydrophobic model drugs, respectively. Rice granules and calcium citrate particles were loaded with vancomycin and gave the percent loading of 84.9 …
Preparation Of Alginate Capsule Using Two Coaxial Glass-Tube, Panida Watchanung
Preparation Of Alginate Capsule Using Two Coaxial Glass-Tube, Panida Watchanung
Chulalongkorn University Theses and Dissertations (Chula ETD)
TEMPO-Oxidized bacterial cellulose (TOBC) were obtained using TEMPO-mediated oxidation (TOBC) to produce carboxylate groups on bacterial cellulose surfaces. TOBC had lower crystallinity but better aqueous dispersion than bacterial cellulose. TOBC was used as a reinforcement agent for production alginate capsules. The alginate capsules for entrapping rice bran oil were made via a coaxial-glass tube. The factors that influenced on the shape and production efficiency of capsules were the gap between tube tip and the Ca2+ ions bath and the viscosity of shell solution. However, these factors had no effect on the size and shell thickness of capsules. Increasing of TOBC …
Preparation And Characterization Of Starch Films Reinforced With Citrate Cellulose Nanocrystals, Prapaporn Nakarat
Preparation And Characterization Of Starch Films Reinforced With Citrate Cellulose Nanocrystals, Prapaporn Nakarat
Chulalongkorn University Theses and Dissertations (Chula ETD)
Citrate-modified bacterial cellulose nanocrystals (citrate CNCs) were prepared by a green one-pot dual acid (citric and hydrochloric acids) method and used them to reinforce three types of starch films; corn, wheat and rice starch films. The average length and width of citrate CNCs were 583 and 46 nm, respectively. The degree of citrate substitution on CNCs was 0.075 and its crystallinity index was closely to the original bacterial cellulose. The effect of various amount of citrate CNCs (0-20%wt of starch) on film property was study. Three starch films showed the same trend of examination results. The film thickness of most …
Surface-Enhanced Raman Scattering Technique For Polycyclic Aromatic Hydrocarbons Detection Using Thiol-Functionalized Silver Nanoparticle Films, Sathita Taksadej
Surface-Enhanced Raman Scattering Technique For Polycyclic Aromatic Hydrocarbons Detection Using Thiol-Functionalized Silver Nanoparticle Films, Sathita Taksadej
Chulalongkorn University Theses and Dissertations (Chula ETD)
The detection of polycyclic aromatic hydrocarbons (PAHs) is developed based on surface-enhanced Raman scattering (SERS) using silver nanoparticle films as SERS substrates. The films are fabricated by a Langmuir Blodgett (LB) method and the surface of AgNP films are functionalized with various types of aromatic and aliphatic thiols, i.e., naphthalenethiol, phenylethanethiol, pentanethiol, octanethiol, and dodecanethiol, to create a hydrophobic layer for PAHs to attach on and stay in hot spot. The results indicate that nine kinds of PAHs with different structures, i.e., anthracene, chrysene, naphthacene, naphthalene, phenanthrene, pentacene, perylene, pyrene, and triphenylene, can attach on the surfaces of thiol-modified AgNP …
Improved Barrier Properties Of Pp/Ldpe Composite Film: Effect Of Montmorillonite And Poly (Lactic Acid), Supornpat Mooninta
Improved Barrier Properties Of Pp/Ldpe Composite Film: Effect Of Montmorillonite And Poly (Lactic Acid), Supornpat Mooninta
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this research, the properties of polypropylene (PP) were improved for single layer film application by incorporating low density polyethylene (LDPE), poly(lactic acid) (PLA) and montmorillonite (MMT). The polymer composites was prepared by melt blending using a twin screw extruder and the film was produced by cast film extruder. The addition of LDPE in PP improved the elongation at break and tear strength. The PP/LDPE blend at the ratio of 80:20 (w/w) was selected for blending with PLA and MMT and the PP/LDPE/PLA/MMT composite showed the increased tensile modulus while the elongation at break decreased with increasing PLA and MMT …
Polyisocyanurate Foams Preparation Catalyzed By Mixtures Of Copper-Amine Complexes/Potassium 2-Ethylhexanoate, Teeraporn Suwannawet
Polyisocyanurate Foams Preparation Catalyzed By Mixtures Of Copper-Amine Complexes/Potassium 2-Ethylhexanoate, Teeraporn Suwannawet
Chulalongkorn University Theses and Dissertations (Chula ETD)
In this research, a new catalyst system for the preparation of polyisocyanurate (PIR) foam was developed. The mixture of copper-amine complex:potassium 2-ethylhexanoate (K-15) and metal-ethanolamine complex:K-15 were used as catalysts. Two copper-amine complexes and two metal-ethanolamine complexes, namely Cu(OAc)2(en)2, Cu(OAc)2(trien), Cu(OAc)2(EA)2 and Zn(OAc)2(EA)2, respectively; where en = ethylene diamine, trien = triethylenetetramine and EA = ethanolamine, were used as catalyst for blowing and gelling reactions. K-15 was used as a catalyst for trimerization reaction. These catalysts could be further used in the preparation of PIR forms without purification. Characterization of catalysts were done by using UV-visible spectroscopy. The factors investigated …
Effect Of Cu(In,Ga)₃Se₅ Ultra-Thin Layer On Optical Properties And Photovoltaic Efficiency Of Cu(In,Ga)Se₂ Thin Film Solar Cells, Boonyaluk Namnuan
Effect Of Cu(In,Ga)₃Se₅ Ultra-Thin Layer On Optical Properties And Photovoltaic Efficiency Of Cu(In,Ga)Se₂ Thin Film Solar Cells, Boonyaluk Namnuan
Chulalongkorn University Theses and Dissertations (Chula ETD)
Cu(In,Ga)3Se5 (135-CIGS) layers with various thicknesses were deposited on the surface of ~1.8 micron thick Cu(In,Ga)Se2 (112-CIGS) photon absorber in the fabrication of CIGS thin film solar cells. This significantly affects the shift of the optical band gap energy from 1.15 eV (112-CIGS) to 1.19 eV, with only 10 nm thick of 135-CIGS capping layer, leading to the increase in the open-circuit voltage (Voc) of the solar cells. The optical transmission spectra show no sign of separated 135-CIGS layer. The maximum Voc of 670 mV is obtained from 5-10 nm thick 135-CIGS capping layer on 112-CIGS compared to 646 mV …
Application Of Adversarial Networks In Search For Four Top Quark Production In Cms, Vichayanun Wachirapusitanand
Application Of Adversarial Networks In Search For Four Top Quark Production In Cms, Vichayanun Wachirapusitanand
Chulalongkorn University Theses and Dissertations (Chula ETD)
One burden of high energy physics data analysis is uncertainty within the measurement, both systematically and statistically. Even with sophisticated neural network techniques that are used to assist in high energy physics measurements, the resulting measurement may suffer from both types of uncertainties. Fortunately, most types of systematic uncertainties are based on knowledge from information such as theoretical assumptions, for which the range and behaviour are known. It has been proposed to mitigate such systematic uncertainties by using a new type of neural network called adversarial neural network (ANN) that would make the discriminator less sensitive to these uncertainties, but …
Effects Of Organic Molecule Orientations On Perovskite Structure Of Formamidinium Lead Iodide, Wiwittawin Sukmas
Effects Of Organic Molecule Orientations On Perovskite Structure Of Formamidinium Lead Iodide, Wiwittawin Sukmas
Chulalongkorn University Theses and Dissertations (Chula ETD)
Latterly, an emergence of the hybrid organic-inorganic perovskites has captivated an increasing rate of world-wide attention due to their approving physical properties. Formamidinium lead iodide (FAPI), a promising compound owing to its high photovoltaic performance, consists of an organic molecule, i.e. the formamidinium (FA) cation, dwelling in the centre of the cubic unit cell, caged by the inorganic framework, PbI6. By adopting the ab initio method based on the density functional theory including the spin-orbit coupling (SOC) effects, the effects of the FA cation on the cubic FAPI were thoroughly and systematically investigated. Solidly armed with Euler's rotations, energy landscapes …
Effect Of Local Rewiring In Adaptive Epidemic Erdos-Renyi Random Networks, Suwakan Piankoranee
Effect Of Local Rewiring In Adaptive Epidemic Erdos-Renyi Random Networks, Suwakan Piankoranee
Chulalongkorn University Theses and Dissertations (Chula ETD)
Adaptive epidemic network is driven by two main processes, (1) infectionrecovery process that changes the states of the nodes, and (2) rewiring process that modifies the topology of the network. In the past two decades, epidemic models on adaptive networks have gained interests because understanding the dynamics between these two processes can be key to improving control of diseases. However, in most of these models, the rewiring mechanism is based on information known globally, i.e., everyone knows the health status of all others in the network. This concept is not practical in real life for large network. This dissertation aims …