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2020

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Determinants Of Cross-Border Mergers And Acquisitions Of Firms In Thailand, Pongpak Weerakiet Jan 2020

Determinants Of Cross-Border Mergers And Acquisitions Of Firms In Thailand, Pongpak Weerakiet

Chulalongkorn University Theses and Dissertations (Chula ETD)

In this paper, we evaluate the effects of firm-level and country-level variables on the firms' probability of having cross-border M&A deals and the size of the deals. Our sample consists of 87 firms from SET100 Index (firms from financial industry are excluded), and the data between 2009 to 2018 is used in this paper. The results indicate that the increase in ownership advantages of the firms, namely, size and profitability raise the chance of the firms having cross-border M&A deals and the size of the deals. For country-level variables, the results agree with the gravity model that an increase in …

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The Economic Impact Of Gastronomic Tourism: The Ubud Food Festival, Sabrina Yuka Amilia Jan 2020

The Economic Impact Of Gastronomic Tourism: The Ubud Food Festival, Sabrina Yuka Amilia

Chulalongkorn University Theses and Dissertations (Chula ETD)

The main objective of this paper is to assess the economic impact in Bali during the Covid-19 pandemic by proposing the case of Ubud Food Festival 2019 with input-output analysis. Due to the outbreak, most scheduled festivals in 2020 have been cancelled, including Ubud Food Festival 2020. Computing the festival impact generated by 54 sectors in Bali's economy, this study constructs regional output, value-added, and income multipliers. The result figured that among the gastronomic tourism-related sector, the food and beverage service industry has the largest number on regional output multiplier, recreational and sporting activities have the largest number on value-added …

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Beauty Premium, Information Signaling And Job Opportunities Of Ex-Prisoners In Labour Market, Taksaorn Phuchongpravech Jan 2020

Beauty Premium, Information Signaling And Job Opportunities Of Ex-Prisoners In Labour Market, Taksaorn Phuchongpravech

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis studies the impact of factors influencing ex-prisoners' labour market re-entry. It is separated into three studies. The first study evaluates the effect of beauty premiums from cosmetic surgery on male ex-prisoners under asymmetric information settings where employers are unaware of candidates' criminal history. Using a Choice Experiment approach (CEs), the beauty from cosmetic surgery performs as the signal submitted to 400 employers. The results show that the beauty from cosmetic surgery associates with the increase of possibility of candidates in the experiments being chosen by 3.05 and 1.54 times, in the formal and informal sector, respectively. The second …

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The Effect Of Direct Taxes On Income And Wealth Distribution In Thailand Under Comprehensive Income Concept, Voramast Limteerakul Jan 2020

The Effect Of Direct Taxes On Income And Wealth Distribution In Thailand Under Comprehensive Income Concept, Voramast Limteerakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis research comprises three studies, each of which investigates the inequality of income and wealth in Thailand from 1996 to 2017 and the impact of personal income tax and taxes on real estate on that inequality. Shorrocks Index decomposition technique is applied to examine the key drivers of inequality in the country in the first two studies. In the third study, the analysis is developed under the Heckman Selection Model to estimate the effect of personal income tax policy reform on the individual. The overall results demonstrate that accrued capital gains from asset ownership are the main drivers of …

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The Impact Of Internet Finance On The Profitability Of Commercial Banks In China, Yuting Song Jan 2020

The Impact Of Internet Finance On The Profitability Of Commercial Banks In China, Yuting Song

Chulalongkorn University Theses and Dissertations (Chula ETD)

Several studies analyzed the impact of internet finance on the profitability of Chinese commercial banks. This paper adds to the literature by focusing on two types of internet finance, internal internet finance (online banking) and external internet finance (third-party-payment (TPP) and peer-to-peer lending (P2P) platforms), and their relationship with bank performance. Two datasets that cover the years 2011 to 2018 are used for the regression analyses, a balanced panel dataset of 10 banks to analyze the impact of internal and external internet finance on bank performance and an unbalanced panel dataset of a larger sample of 43 banks to further …

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A Model Of Willingness To Communicate In English In Iranian Efl Classroom Context, Azadeh Amirzadi Jan 2020

A Model Of Willingness To Communicate In English In Iranian Efl Classroom Context, Azadeh Amirzadi

Chulalongkorn University Theses and Dissertations (Chula ETD)

The present study aimed to investigate the relationships between WTC in English in classroom context and four trait-like variables: L2 confidence, L2 motivation, L2 anxiety and grit, to propose a WTC model in EFL classroom setting in Iran, and to identify the best predicting variable of WTC in English. The participants were 488 non-English majored university students in two public and two private universities in Iran. The research instrument used in this study was an online questionnaire. The structural equation modeling (SEM) using Amos was conducted to analyze the data. The key findings are as follows. First, positive relationships were …

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The Effects Of Learning Conditioned Narrow Reading Instruction On Vocabulary Knowledge Of English As Foreign Language (Efl) Learners, Benchamas Hanuvong Jan 2020

The Effects Of Learning Conditioned Narrow Reading Instruction On Vocabulary Knowledge Of English As Foreign Language (Efl) Learners, Benchamas Hanuvong

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to 1) investigate the effects of learning conditioned narrow reading instruction on vocabulary knowledge of English as Foreign Language (EFL) Learners, and 2) investigate the perceptions of students toward learning conditioned narrow reading instruction on vocabulary knowledge. Thirty sixth-grade students at a private school in Phra Nakhon Si Ayutthaya Province were selected as participants in this study for 14 weeks. The research instruments employed to collect for this study were 1) vocabulary knowledge pretest and posttest, 2) close-ended questionnaire of students' perceptions towards learning conditioned narrow reading instruction and 3) interview questions. Quantitative data were collected through …

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Teachers' Beliefs And Practices Towards Teaching English Pronunciation Among Efl Senior High School Teachers In Yunnan Province, China, Hua Liu Jan 2020

Teachers' Beliefs And Practices Towards Teaching English Pronunciation Among Efl Senior High School Teachers In Yunnan Province, China, Hua Liu

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objectives of this study were 1) to examine EFL senior high school teachers' beliefs towards teaching English pronunciation in Yunnan province and 2) to investigate the English pronunciation practices used by Yunnan EFL teachers. The participants were 59 EFL senior high school teachers in Yunnan province who were purposively sampled. There were 3 research instruments which were 1) online questionnaire; 2) semi-structured interview and 3) classroom observation. Quantitative data were analyzed by descriptive statistics, which were the means and standard deviation, and qualitative data were analyzed by content analysis. The findings revealed that 1) Yunnan EFL teachers' beliefs towards …

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Creative Drama English Pronunciation Program For Bhutanese Primary Learners, Melam Zangmo Jan 2020

Creative Drama English Pronunciation Program For Bhutanese Primary Learners, Melam Zangmo

Chulalongkorn University Theses and Dissertations (Chula ETD)

The aims of the study were to (1) to develop a Creative Drama English Pronunciation Program to enhance primary learners' pronunciation ability, and (2) to compare learners' English pronunciation ability before and after learning with the Creative Drama English Pronunciation Program. The study process was segmented into two phases; (1) Creative Drama English Pronunciation Program development, and (2) Implementation and Evaluation of the Creative Drama English Pronunciation Program. The participant consisted of 25 primary learners of Bhutan selected through cluster sampling. The study period was 12 weeks. Quantitative data from pre- and posttest was analyzed using Wilcoxon signed-rank test and …

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Effects Of Interleaved Form-Focused English Instruction On Thai Lower Secondary School Students' Grammatical Knowledge And Perception Towards The Instruction, Narongchai Rungwichitsin Jan 2020

Effects Of Interleaved Form-Focused English Instruction On Thai Lower Secondary School Students' Grammatical Knowledge And Perception Towards The Instruction, Narongchai Rungwichitsin

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study investigated the effects of interleaved form-focused instruction (FFI) on Thai lower secondary students' grammatical knowledge, long-term retention, and their perception towards the instruction. Students took a pre-test, an immediate post-test, and a one-week delayed post-test, and were also interviewed at the end of the implementation. The test scores were to investigate the improvement of grammatical knowledge as well as the long-term retention, and the data from the semi-structured interview were analyzed to figure out the perceptions towards the overall instruction. The results showed significant improvement of grammatical knowledge in all areas of form, meaning, and use and also …

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Development Of Infographic Material To Enhance Young English As Foreign Language Learners' Reading Comprehension Through Close Reading Instruction, Nattawan Suksanguan Jan 2020

Development Of Infographic Material To Enhance Young English As Foreign Language Learners' Reading Comprehension Through Close Reading Instruction, Nattawan Suksanguan

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objectives of this study were to: 1) develop infographic materials to help teach young English as foreign language learners' reading comprehension skills and 2) examine how effective the developed materials were in increasing young English as foreign language learners' reading comprehension skills focusing upon non-fiction text and 3) examine the effectiveness of close reading instruction in using infographics as reading materials. The participants included 20 year-four students and five foreign teachers who were purposefully selected from an international programme in one of the demonstration schools in Thailand. The instruments used were: 1) semi-structured interviews for teachers, 2) need analysis …

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Effects Of Digital Literacies On English Reading Fluency For Undergraduate Students, Pimpanitt Chottsawhas Jan 2020

Effects Of Digital Literacies On English Reading Fluency For Undergraduate Students, Pimpanitt Chottsawhas

Chulalongkorn University Theses and Dissertations (Chula ETD)

This mixed-methods study aimed to 1) examine the effects of Digital Literacies on reading fluency in terms of reading rate and reading comprehension, 2) investigate the uses of Digital Literacies. Participants comprised 60 third-year undergraduate students from a public university in Thailand (N = 60), the Faculty of Architecture, during a 10-week intervention. The independent variable was Digital Literacies, while the dependent variable was reading fluency. The instruments used to collect data were the Online English Reading Fluency Test, Reading Fluency Practice: Reading Rate Chart, and Learning Logs. Quantitative data were analyzed through students' Online English Reading Fluency Test using …

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Effects Of Reading Instruction Using Backward Design Framework And Citizenship Theme To Enhance English Reading Comprehension And Social Responsibility Of Tenth Grade Thai Efl Students, Patamaporn Chaisa Jan 2020

Effects Of Reading Instruction Using Backward Design Framework And Citizenship Theme To Enhance English Reading Comprehension And Social Responsibility Of Tenth Grade Thai Efl Students, Patamaporn Chaisa

Chulalongkorn University Theses and Dissertations (Chula ETD)

This study aimed to 1) investigate the effects of reading instruction using Backward Design framework and citizenship theme (BD&CT) to enhance English reading comprehension of tenth grade Thai EFL students, 2) investigate the effects of reading instruction using BD&CT to enhance social responsibility (SR) of the students, 3) explore the opinions of students towards the reading instruction using BD&CT. The participants included 36 tenth grade students who took course in English reading and writing as an additional course in the second semester of the academic year 2019. The research instruments were English reading comprehension test and social responsibility questionnaire, which …

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Development Of An Online Course Using Situated Learning And Esa Method To Enhance English Oral Communication Ability Of University Administrative Staff, Tatchakrit Matyakhan Jan 2020

Development Of An Online Course Using Situated Learning And Esa Method To Enhance English Oral Communication Ability Of University Administrative Staff, Tatchakrit Matyakhan

Chulalongkorn University Theses and Dissertations (Chula ETD)

Since English is the primary mode of communication at institutions of higher education that offer international programs, university administrative staff must be able to communicate in English with academic staff, international students, and partner universities. The purpose of this research is (1) to investigate the effectiveness of an online course that combines situated learning and ESA to improve oral communication skills and (2) to capture the perceptions of university administrative staff towards such a course. The participants were 20 university administrative staff, aged from 22 to 40 years old, 14 females and 6 males, at a public university in Thailand, …

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Guidelines To Enhance Community Participation In Community Learning Centers In The Kingdom Of Cambodia, Piseth Neak Jan 2020

Guidelines To Enhance Community Participation In Community Learning Centers In The Kingdom Of Cambodia, Piseth Neak

Chulalongkorn University Theses and Dissertations (Chula ETD)

The study aims to 1) analyze components of community participation in the CLCs in Cambodia; 2) study current states and desirable needs of community participation in enhancing community participation in the CLCs in Cambodia; 3) propose guidelines to enhance community participation in the CLCs in Cambodia. A semi-structured interview with 5 Cambodian experts has been employed, and all the keywords have been coded to analyze community participation components in the CLCs. Moreover, this research utilized a survey with the selected samples of 28 CLC committee members and 197 people using stratified random sampling by analyzing data through Means (x̅), Standard …

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Digital Storytelling For Cambodian Undergraduate Students' Efl Reading And Digital Literacy, Vychan Otdom Hon Jan 2020

Digital Storytelling For Cambodian Undergraduate Students' Efl Reading And Digital Literacy, Vychan Otdom Hon

Chulalongkorn University Theses and Dissertations (Chula ETD)

The objectives of the study were threefold: (1) to investigate the effect of Digital Storytelling on Cambodian Undergraduate Students' English reading ability, (2) to explore Cambodian Undergraduate Students' perception on their digital literacy after participating in Digital Storytelling, (3) to explore Cambodian Undergraduate Students' perceptions on Digital Storytelling,. The participants of the study were English-majored students (n = 18) in the foundation year from the School of Foreign languages (SFL) at the University of Cambodia (UC). Both qualitative and quantitative data were collected. For the first research objective, a Wilcoxon Signed Rank test was implemented to determine the difference between …

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Development Of Phonics Teaching Guideline For Thai Elementary School Students: Lesson Learned From Best Practice Teachers, Wanida Roatchanaphaphong Jan 2020

Development Of Phonics Teaching Guideline For Thai Elementary School Students: Lesson Learned From Best Practice Teachers, Wanida Roatchanaphaphong

Chulalongkorn University Theses and Dissertations (Chula ETD)

The purposes of this research were to 1) develop the phonics teaching guideline to teach phonics and 2) evaluate the quality of the developed phonics teaching guideline to teach phonics. The questionnaires, observations and interviews were used as main collecting procedures. The research instruments consisted of 1) Phonics teaching questionnaire, 2) fieldnotes and interview questions, and 3) Phonic teaching guideline quality evaluation questionnaire. The participants were 5 best practice phonics teachers who were currently working in a school context at the time which were selected by the research instrument Phonics teaching questionnaire. The data were analysed by statistical percentage, qualitative …

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Power Loss Minimization With Second Order Cone Programming Relaxation, Akira Chuppawa Jan 2020

Power Loss Minimization With Second Order Cone Programming Relaxation, Akira Chuppawa

Chulalongkorn University Theses and Dissertations (Chula ETD)

The minimization of power loss in distribution systems is very important to increase the reliability and performance of the system. Therefore, this thesis determines power loss minimization in a power system. The active power loss can be minimized by the alternating current optimal power flow (ACOPF) under the limits of power generations, bus voltages, and distribution lines. The general ACOPF problem is computationally intractable in practice owing to the nonlinear objective function and nonlinear constraints. Accordingly, the conventional ACOPF is a nonconvex and NP-hard optimization problem. To address this difficulty, this work develops the computation of the ACOPF by applying …

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Electrode Improvement And Neural Network-Based Dynamic Optimization Of Vanadium Redox Flow Battery, Apisada Chutimasakul Jan 2020

Electrode Improvement And Neural Network-Based Dynamic Optimization Of Vanadium Redox Flow Battery, Apisada Chutimasakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

The performance improvement of a vanadium redox flow battery (VRFB) was focused on this study. The two objectives of this study were (1) to investigate the effect of the operating temperatures of the Atmospheric Pressure Plasma jets (APPJs) process on the energy efficiency of the VRFB and (2) to determine the optimal electrolyte flow rate of the VRFB by solving a dynamic optimization based on a neural network model of the VRFB. The APPJs graphite felt electrode treatment temperature providing the highest energy efficiency of the VRFB was 550°C, explained by the Energy Dispersive X-ray Spectrometry (EDX) and X-ray photoelectron …

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Measurement Of Reading Literacy, Growth, And Learning Potential Of Grade 9 Students: Application Of Computerized Dynamic Assessment Concept, Yanika Lunrasri Jan 2020

Measurement Of Reading Literacy, Growth, And Learning Potential Of Grade 9 Students: Application Of Computerized Dynamic Assessment Concept, Yanika Lunrasri

Chulalongkorn University Theses and Dissertations (Chula ETD)

The aims of this research were to (1) develop and validate the computerized dynamic assessment for reading literacy and (2) study the effects of different types of prompting of the computerized dynamic assessment on reading literacy, growth of learning, and learning potential. The pilot samples were a total of 802 ninth-grade students in six secondary schools in Bangkok. The data for the main study was gathered from 541 ninth-grade students in eleven secondary schools in Bangkok. A quasi-experimental design was adopted. Research instruments were reading literacy tests for computerized dynamic assessment. The data were analyzed as follows: 1) ANCOVA statistics …

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Optimization Model For Chemical Tank Container Management, Atiwich Anantkijthamrong Jan 2020

Optimization Model For Chemical Tank Container Management, Atiwich Anantkijthamrong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Owing to lack of appropriate tool for operational decision, this study aims to develop an optimization model for chemical tank container management using linear programming methodology. The objective function is to maximize net profit while taking container routing, empty container repositioning, and container spot leasing into account as decision variables. The basic constraints used in the model are related to spot demand accommodation and conservation of tank container flows. On top of that, additional repositioning constraints and financial incentives may be utilized to promote empty container repositioning, hence, allow the model to behave alike actual operation. The model results show …

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Techno-Economic Analysis Of Diethyl Ether Production Via Catalytic Dehydration Of Ethanol, Boonraksa Chaiapha Jan 2020

Techno-Economic Analysis Of Diethyl Ether Production Via Catalytic Dehydration Of Ethanol, Boonraksa Chaiapha

Chulalongkorn University Theses and Dissertations (Chula ETD)

The major source of energy comes from non-renewable fuels, which have a non-sustainability and negative impact on the environment. Thus, there is change to renewable fuels as bioethanol. Diethyl ether (DEE) is a part of bioethanol. However, the increase of electric vehicles (EV) may decrease ethanol demand for biofuel in the future. Thus, it will be interesting in adding value to ethanol via the catalytic dehydration to produce DEE by conduct techno-economic analysis. Further, there is comparison on different concentrations of ethanol (93% and 95% ethanol) that affect DEE production. For simulation part, the DEE capacity of 3,600 tons/year is …

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A Hybrid Electronic Nose System Based On Metal Oxide Semiconductor Gas Sensors And Compact Paper-Pased Colorimteric Sensors For Volatile Organic Compounds Classification, Aung Khant Maw Jan 2020

A Hybrid Electronic Nose System Based On Metal Oxide Semiconductor Gas Sensors And Compact Paper-Pased Colorimteric Sensors For Volatile Organic Compounds Classification, Aung Khant Maw

Chulalongkorn University Theses and Dissertations (Chula ETD)

Commercial metal oxide semiconductor (MOS) sensors usually employed in electronic noses (e-noses) are well known for being low-cost, portability, and ease of use. However, these sensors can only identify a limited number of odors due to insufficient selectivity. Recent studies improved the selectivity by jointly integrating the MOS sensors with additional sensor sources. However, the published hybrid systems involved complex fabrication and measurement procedures. On the contrary, this work utilizes paper-based colorimetric sensors which are simpler and easier to use. This proposed hybrid system consists of 8 commercial metal oxide sensors and a paper-based colorimetric sensor coated with phenol red, …

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Characteristics Improvement Of Quantum Dot Semiconductor Optical Amplifier For Access Network, Budsara Boriboon Jan 2020

Characteristics Improvement Of Quantum Dot Semiconductor Optical Amplifier For Access Network, Budsara Boriboon

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis presents the characteristics improvement and performance evaluation of Quantum Dot Semiconductor Optical Amplifier (QD SOA) in an access network. There are 3 parts: 1) improvement of internal quantum efficiency, 2) increase of chip gain and 3) implementation of QD SOA in 40 Gb/s access network. The first part, Rapid Thermal Annealing (RTA) is applied to improve internal quantum efficiency to be 1.4 times higher than without RTA and low optical loss. The second part, strain compensation technique is applied to increase the chip gain of QD SOA. Considering the design of Quantum Dot Laser Diode with optimized stacked …

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A Robust System For Core Thai Natural Language Processing Technologies, Can Udomcharoenchaikit Jan 2020

A Robust System For Core Thai Natural Language Processing Technologies, Can Udomcharoenchaikit

Chulalongkorn University Theses and Dissertations (Chula ETD)

As the amount of unstructured textual data grows, it becomes increasingly important to build an intelligent system that can process it. Natural Language Processing (NLP) is a technology that allows a computer to exploit human languages to perform tasks. Deep learning models have shown excellent results across fundamental tasks in NLP, such as word segmentation, part-of-speech tagging, and named-entity recognition. However, in many situations, these proposed methods fail to perform well. For an NLP system to be robust, it must address issues such as out-of-vocabulary and spelling-mistakes. This thesis's research goal is to develop NLP models that can handle malformed …

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Semi-Supervised Thai Sentence Segmentation Using Local And Distant Word Representations, Chanatip Saetia Jan 2020

Semi-Supervised Thai Sentence Segmentation Using Local And Distant Word Representations, Chanatip Saetia

Chulalongkorn University Theses and Dissertations (Chula ETD)

A sentence is typically treated as the minimal syntactic unit used for extracting valuable information from a longer piece of text. However, in written Thai, there are no explicit sentence markers. We proposed a deep learning model for the task of sentence segmentation that includes three main contributions. First, we integrate n-gram embedding as a local representation to capture word groups near sentence boundaries. Second, to focus on the keywords of dependent clauses, we combine the model with a distant representation obtained from self-attention modules. Finally, due to the scarcity of labeled data, for which annotation is difficult and time-consuming, …

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A Model Predictive Control Strategy Based On Predicted Mean Vote For A Building Hvac System, Chanthawit Anuntasethakul Jan 2020

A Model Predictive Control Strategy Based On Predicted Mean Vote For A Building Hvac System, Chanthawit Anuntasethakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis proposes a design of a supervisory model predictive controller for a heating-ventilation-air-conditioning (HVAC) control system. The control objective is to minimize the operating cost and take into account of electrical load shaving and thermal comfort of users. To ensure that thermal comfort is well regulated, we utilize the Predicted Mean Vote (PMV) as an indicator and determine an acceptable bound of a desired set-point temperature. The control design consists of two layers, namely, a supervisory control (SC) layer and a model predictive control (MPC) layer. For the SC layer, we explore a configuration including the choice of predesign …

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A Comparative Simulation Of Glycerol Steam Reforming With Foam And Conventional Pellet Catalysts In Packed Bed Reactor, Chattharika Phitchayakorn Jan 2020

A Comparative Simulation Of Glycerol Steam Reforming With Foam And Conventional Pellet Catalysts In Packed Bed Reactor, Chattharika Phitchayakorn

Chulalongkorn University Theses and Dissertations (Chula ETD)

This research aimed to study the effect of different catalyst structures to the hydrogen production process with glycerol steam reforming in packed bed reactors via the COMSOL Multiphysics program. 2D pseudo-homogeneous steady-state model of a 6-inch diameter adiabatic reactor has been developed to describe a transport phenomenon inside the packed bed reactors with two different catalyst structures of conventional 1-inch pellet catalyst and 10-30PPI foam catalyst. The simulated results show that the novel foam catalyst improved the process performance in terms of pressure drop and hydrogen yield comparing to the conventional 1-inch pellet catalyst. The reactor packed with the conventional …

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Optimal Sizing Of Battery Energy Storage System With Rooftop Pv Generation System, Chawin Prapanukool Jan 2020

Optimal Sizing Of Battery Energy Storage System With Rooftop Pv Generation System, Chawin Prapanukool

Chulalongkorn University Theses and Dissertations (Chula ETD)

With a significant growth of the rooftop photovoltaic systems (PVs) under the behind-the-meter scheme (BTMS), the battery energy storage systems (BESS) have been developed to enhance the performance of rooftop PVs in many aspects, especially the electricity charge savings. The BTMS can be typically classified into three schemes of self-consumption scheme, net-metering scheme, and net-billing scheme. Other than these schemes, the solar power purchase agreement (SPPA) has been developed to be one the most attractive business models. The SPPA is the scheme where the investors propose to directly sell an electricity from rooftop PVs with BESS to the customers without …

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An Assessment Of Root Reinforcement On Soil Slope Using Centrifuge And Numerical Modelling, Gayuh Aji Prasetyaningtiyas Jan 2020

An Assessment Of Root Reinforcement On Soil Slope Using Centrifuge And Numerical Modelling, Gayuh Aji Prasetyaningtiyas

Chulalongkorn University Theses and Dissertations (Chula ETD)

The extreme rainfall as an effect of climate change has been considered as the main problem due to landslide hazard. The rainfall can trigger slope failure through the kinetic energy of raindrop and decreasing of soil resistance due to the increasing of pore water pressure. Vegetation is considerably as low cost and environmentally friendly slope reinforcement. The root specifically provides high contribution in strengthen the soil through the root-soil interaction. However, there is a gap between slope reinforcement by root modelling and field assessment result. The gap is an impact of indirect linked between laboratory modelling and existing vegetated slope …

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