cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2014.225
title: TRAVEL BEHAVIOR AND RESPONSES TO CHANGE IN TRANSIT FARE: A COMPARATIVE STUDY OF URBAN RAIL PASSENGERS BETWEEN BANGKOK AND MANILA

description: Bangkok City, Thailand and Metro Manila, Philippines each have three urban rail systems. Such rail systems aim to help alleviate the traffic congestion and provide more accessibility and convenience of mass transportation to commuters. The urban rail systems in both areas are different from each other but the city setting is quite similar in terms of traffic congestion and population density. Comparing all three urban rail systems in Bangkok and Manila, the transit fare for Bangkok rails are quite high and wide-ranging compared to the very low transit fare offered in the Manila rail counterparts. This study focuses on evaluating and comparing the characteristics of the urban rail system infrastructure and passengers in both cities. Using the concept of price elasticity we demonstrated the sensitivity of urban rail passengers when a change in transit fare is implemented. Fare elasticity values obtained were found to be -2.537 and -2.051 for the Bangkok and Manila rails, respectively, implying that the responsiveness of Bangkok rail users were higher compared to the Manila rail users when a price change is implemented. A modified Price Sensitivity Measurement (PSM), Kishi’s Logit PSM (KLP), was also used to determine reasonable price range for transit fare in both urban rail systems. Results indicated that Manila rail transit fares could be increased, while Bangkok rail systems already had a reasonable fare setting.
DOI: 10.14457/cu.the.2014.226
title: MODELING OF PHOTOVOLTAIC GENERATION SYSTEM FOR SHADING IMPACT ANALYSIS

description: At present, electrical energy is very important for the development of economy and living, such as education, transportation, communication, etc. The demand for electrical energy worldwide is increasing year by year. Although there are a variety of electrical energy sources, some of them are unsafe for humans and environment (nuclear power), not sustainable for the long future (fossil thermal power). In contrast, renewable energy sources, such as wind, biomass, photovoltaic, etc., are sustainable and environment-friendly. Among these sources, solar energy has been intensively promoted because it is prevailing wherever the sun is shining and it is the most environmentally friendly compared with other energy sources. Additionally, photovoltaic modules and plants for converting solar energy into electrical energy are easily installed at various places where the sunlight is available such as roof tops and wall sides of buildings, and farms. This research examines the decrease of solar power caused by various shading patterns. Then, the arrangement of PV modules in order to mitigate the impact of shading and to optimize the maximum power point tracking is proposed. After that, shading patterns with appropriate tilted angle and azimuth are simulated to show the improvement in power generation.
DOI: 10.14457/cu.the.2014.227
title: EVALUATION OF DOUBLE DISPLACEMENT PROCESS VIA GAS DUMPFLOOD FROM MULTIPLE GAS RESERVOIRS

description: Double displacement process (DDP) is an efficient method to increase oil recovery by starting with water injection and followed by gas injection. In order to reduce the cost of gas injection units, the concept of gas dumpflood is utilized by using multiple thin gas layers as the gas source. In this study, the effects of the perforation program, operational liquid rates and characteristics of gas reservoirs are evaluated using reservoir simulation. Perforating full to base in all gas layers at the same time provides a higher recovery factor than two-batch perforation because larger amount of gas flows into the oil reservoir at early time. Higher target liquid production rates during waterfood require shorter time to produce oil than lower ones. However, there is not much difference in recovery factors obtained from different target liquid production rates during waterflood. Nevertheless, the target liquid production rate during gas dumpflood needs to be properly selected in order to delay the gas breakthrough and still get high recovery within the time constraint. Larger depth difference between the bottom of the oil zone and the top of gas reservoirs slightly increases the oil recovery factor due to higher pressure and longer support. Regarding original gas in place, higher amount of gas results in higher oil recovery owing to longer pressure support.
DOI: 10.17632/bdp25zzbrn.1
title: Data for: Estrogenic Phytochemical from Labisia pumila (Myrsinaceae) with Selectivity towards Estrogen Receptor Alpha and Beta Subtypes

description: NMR spectra of alkyl resorcinols and a dimeric 1,4-benzoquinone from Labisia pumila. Inclusive of graphs of concentration-response curve for estrogen receptor alpha and beta binding assay and Cytotoxic HL60 assay.
DOI: 10.25606/surf.578c6039-6d23740a
title: The Cosmogrid Simulation: Statistical Properties of Small Dark Matter Halos (1024-031)

description: We present the results of the "Cosmogrid" cosmological N-body simulation suites based on the concordance LCDM model. The Cosmogrid simulation was performed in a 30 Mpc box with 2048³ particles. The mass of each particle is 1.28x10^5 Msun, which is sufficient to resolve ultra-faint dwarfs. We found that the halo mass function shows good agreement with the Sheth & Tormen fitting function down to ~10^7 Msun. We have analyzed the spherically averaged density profiles of the three most massive halos which are of galaxy group size and contain at least 170 million particles. The slopes of these density profiles become shallower than -1 at the inner most radius. We also find a clear correlation of halo concentration with mass. The mass dependence of the concentration parameter cannot be expressed by a single power law, however a simple model based on the Press-Schechter theory proposed by Navarro et al. gives reasonable agreement with this dependence. The spin parameter does not show a correlation with the halo mass. The probability distribution functions for both concentration and spin are well fitted by the log-normal distribution for halos with the masses larger than ~10^8 Msun. The subhalo abundance depends on the halo mass. Galaxy-sized halos have 50% more subhalos than ~10^11 Msun halos have. This is snapshot 031 of the 1024³ resolution collection.
DOI: 10.25606/surf.578c6039-727ea558
title: The Cosmogrid Simulation: Statistical Properties of Small Dark Matter Halos (1024-032)

description: We present the results of the "Cosmogrid" cosmological N-body simulation suites based on the concordance LCDM model. The Cosmogrid simulation was performed in a 30 Mpc box with 2048³ particles. The mass of each particle is 1.28x10^5 Msun, which is sufficient to resolve ultra-faint dwarfs. We found that the halo mass function shows good agreement with the Sheth & Tormen fitting function down to ~10^7 Msun. We have analyzed the spherically averaged density profiles of the three most massive halos which are of galaxy group size and contain at least 170 million particles. The slopes of these density profiles become shallower than -1 at the inner most radius. We also find a clear correlation of halo concentration with mass. The mass dependence of the concentration parameter cannot be expressed by a single power law, however a simple model based on the Press-Schechter theory proposed by Navarro et al. gives reasonable agreement with this dependence. The spin parameter does not show a correlation with the halo mass. The probability distribution functions for both concentration and spin are well fitted by the log-normal distribution for halos with the masses larger than ~10^8 Msun. The subhalo abundance depends on the halo mass. Galaxy-sized halos have 50% more subhalos than ~10^11 Msun halos have. This is snapshot 032 of the 1024³ resolution collection.
DOI: 10.25606/surf.578c6039-dd44e1f9
title: The Cosmogrid Simulation: Statistical Properties of Small Dark Matter Halos (1024-030)

description: We present the results of the "Cosmogrid" cosmological N-body simulation suites based on the concordance LCDM model. The Cosmogrid simulation was performed in a 30 Mpc box with 2048³ particles. The mass of each particle is 1.28x10^5 Msun, which is sufficient to resolve ultra-faint dwarfs. We found that the halo mass function shows good agreement with the Sheth & Tormen fitting function down to ~10^7 Msun. We have analyzed the spherically averaged density profiles of the three most massive halos which are of galaxy group size and contain at least 170 million particles. The slopes of these density profiles become shallower than -1 at the inner most radius. We also find a clear correlation of halo concentration with mass. The mass dependence of the concentration parameter cannot be expressed by a single power law, however a simple model based on the Press-Schechter theory proposed by Navarro et al. gives reasonable agreement with this dependence. The spin parameter does not show a correlation with the halo mass. The probability distribution functions for both concentration and spin are well fitted by the log-normal distribution for halos with the masses larger than ~10^8 Msun. The subhalo abundance depends on the halo mass. Galaxy-sized halos have 50% more subhalos than ~10^11 Msun halos have. This is snapshot 030 of the 1024³ resolution collection.
DOI: 10.5281/zenodo.3339845
title: finals_2019_07_156

description: Log and boot files of game 156
DOI: 10.5281/zenodo.3339847
title: finals_2019_07_157

description: Log and boot files of game 157
DOI: 10.5281/zenodo.3339848
title: finals_2019_07_157

description: Log and boot files of game 157
DOI: 10.5281/zenodo.3339851
title: finals_2019_07_158

description: Log and boot files of game 158
DOI: 10.5281/zenodo.3339852
title: finals_2019_07_158

description: Log and boot files of game 158
DOI: 10.5281/zenodo.3339855
title: finals_2019_07_159

description: Log and boot files of game 159
DOI: 10.5281/zenodo.3339856
title: finals_2019_07_159

description: Log and boot files of game 159
DOI: 10.5281/zenodo.3340566
title: finals_2019_07_160

description: Log and boot files of game 160
DOI: 10.5281/zenodo.3340567
title: finals_2019_07_160

description: Log and boot files of game 160
DOI: 10.14457/cu.the.2014.228
title: Evaluation of Sequential Polymer Flooding in Multi-layered Heterogeneous Reservoir

description: Polymer flooding is a well-known technique used for controlling mobility ratio from both viscosity enhancement and reduction of effective permeability to water, leading to improvement of sweep efficiency as well as wellbore profile. This study emphasizes on effect of sequential polymer flooding together with residual resistance factor on multi-layered heterogeneous reservoir. Effectiveness of sequential polymer flooding is evaluated by comparing results with single-slug polymer flooding. In this study, pre-flushed water is not required since polymer adsorption results in water slug functioning as pre-flushed water. High polymer concentration and large slug size tend to yield favorable results. However, too large slug size could result in unsatisfactory in economic point of view. Benefit of sequential polymer flooding is shortening total production period and reducing total water production. To design sequential polymer flooding scheme, first polymer slug should be high in polymer concentration and large in slug size to maintain stability of displacement. High contrast in reduction of concentration results in more concern on first slug size compared to low contrast in reduction of concentration. Sequential polymer flooding is even more effective in case of high value of residual resistance factor. Increment of oil recovery can be obtained from optimal scheme. However, sequential polymer flooding is more suitable with low heterogeneity reservoir since high heterogeneity tends to decrease it effectiveness due to poor permeability distribution.
DOI: 10.14457/cu.the.2014.229
title: EVALUATION OF CYCLIC STEAM INJECTION IN MULTI-LAYERED HETEROGENEOUS RESERVOIR

description: Cyclic steam injection (CSI) is a thermal recovery technique performed by injecting periodically heated steam into heavy oil reservoir. Oil viscosity is substantially reduced by means of heat transferred from steam. Together with gas pressurization, oil recovery is greatly improved. Effects of reservoir heterogeneity together with reservoir parameters are evaluated prior to field implementation. Judging of the best operating parameters is based on oil recovery factor and energy consumption. Steam quality of 1.0 together with soaking period of 6 days is chosen as the best condition. Results show that reservoir heterogeneity in terms of Lorenz coefficient value slightly affects CSI process. Reservoir model with Lorenz coefficient value of 0.328 which is moderate heterogeneous model obtains benefits from well-distribution of permeability and good steam propagation. High oil recovery factor is obtained from early and later periods and low energy consumption is achieved. Higher vertical permeability is more favorable for CSI process. Better propagation of steam in upper layers and percolation of hot condensed water due to gravity results in high oil recovery factor. Higher portion of structural shale reduces performance of CSI process due to reduction of thermal conductivity of rock and hence, this condition is not favorable. Lower value of Corey’s exponent favors steam propagation in top layers due to high effective permeability of fluids. Smaller irreducible water at reservoir temperature results in higher initial oil saturation. Therefore, higher portion of oil receives heat from steam, resulting in high oil recovery. Smaller residual oil at elevated temperature is favorable since oil can be maximally recovered. Coarsening upward permeability sequence leads to well development of steam chamber on top of reservoir that consequently causes percolation of hot condensed water to lower layers, whereas steam tends to expand in middle layers in fining upward sequence.
DOI: 10.14457/cu.the.2014.230
title: WATER DUMPFLOOD INTO MULTIPLE LOW-PRESSURE GAS RESERVOIRS

description: Water dumpflood into nearly abandoned gas reservoirs is a new promising approach to increase gas recovery by maintaining the reservoir pressures with much cheaper costs than waterflooding. Thus, a simulation study of water dumpflood into multiple nearly abandoned thin-bedded gas reservoirs commonly found in the Gulf of Thailand was conducted to demonstrate the advantage of the proposed method and to determine the most suitable operation conditions for reservoirs having different system parameters. This simulation study found that water dumpflood can increase gas recovery up to 10.5% depending on operational conditions and system parameters. It is best to start water dumpflood when the gas rate is below the plateau rate for systems having a large aquifer and long distance between wells because the long well distance helps delay water breakthrough and earlier dumpflood operation requires shorter production duration. On the other hand, for the systems having a large aquifer and short distance between the two wells, performing water dumpflood when the rate is close to the economic rate is better because water is more likely to cause an early breakthrough when the distance is short. For system having small or moderate aquifer size, water breakthrough is more likely to occur later, thus, dumpflood should be performed when the gas rate is below plateau as it requires shorter production duration. However, if booster compressor is used, water dumpflood is not recommended to perform because it yields very small incremental recovery factors.
DOI: 10.14457/cu.the.2014.231
title: COMPARATIVE PRODUCTION PERFORMANCE BETWEEN CONVENTIONAL WATER ALTERNATING GAS FLOODING AND WATER DUMPFLOOD ALTERNATING GAS INJECTION

description: Water dumpflood alternating gas injection (WDAG) to improve oil recovery is proposed in this thesis. Eliminating water flooding system at surface, water flows freely through a dumping well from an aquifer to the oil reservoir alternating gas injection from surface. The water dumping well is perforated in both the aquifer and oil zones to allow cross flow of water. A reservoir simulation model was built to investigate conventional water alternating gas injection (WAG) and water dumpflood alternating gas injection from underlying and overlying aquifer. Several scenarios of aquifer depths, target gas injection rates and water-gas injection cycles were investigated. It has been found that conventional WAG and WDAG yield the highest recovery factor at water-gas injection cycles of 1: 1 month and at high target gas injection. Target gas injection rate and water-gas injection cycle slightly affect the performance of conventional WAG but significantly impact WDAG. The sensitivity study indicates that an increase in volumetric ratio of aquifer to oil reservoir slightly increases the recovery factor in WDAG. The depth of underlying aquifer shows minor effect the performance of WDAG while a shallower overlying aquifer yields slightly better oil recovery factor than those for a deeper overlying aquifer. At the highest target gas injection rate of 16 MMSCF / D, WDAG recovery factor is about 2% lower than conventional WAG. However, WDAG does not require any water injection from surface.
DOI: 10.14457/cu.the.2014.232
title: OPTIMAL HORIZONTAL WELL PLACEMENT IN COMBINATION DRIVE THIN OIL RIM

description: Producing from thin oil rim reservoirs has always been a challenge in oil and gas industry, due to problems related with early gas and water coning that usually limit oil production below commercial rates. Most of the thin oil rim reservoirs are sandwiched between an overlain gas cap and an underlain aquifer. Strategies to develop thin oil rim have been studied and implemented such as the concurrent oil and gas production as well gas blowdown after oil recovery. As thin oil rim reservoirs are susceptible to coning or cresting of gas and water, horizontal wells are preferred with the objective of maximizing oil recovery while coning tendencies are minimized. In order to maximize the oil recovery in these columns, this study investigates how horizontal well location and target liquid production rate affect oil recovery for different gas cap and aquifer sizes in a thin oil rim column with 70 ft thickness using a numerical reservoir simulator (ECLIPSE 100). Results show that the gas cap size and aquifer strengths play an important role on the increment of oil recovery. In general, the well should be located at the bottom half of the thin oil rim when the gas cap has stronger influence than water and at the upper half of the thin oil rim when the aquifer support is stronger than gas expansion. For small and moderate aquifer size (5 and 50 PV), small target liquid rates yields the highest oil recovery factor, while for larger aquifer size (500 PV) higher target liquid rate leads the highest oil recovery.
DOI: 10.14457/cu.the.2014.233
title: ANALYSIS OF SECURITY VULNERABILITIES USING MISUSE PATTERN TESTING APPROACH

description: Vulnerability detection is commonly been executed during the testing phase of software development. Current methods are not able to detect system or software security vulnerabilities of certain types of attacks during the early stages of software development. These attacks include both the ones were anticipated as well as the ones unknown during the design phase. This paper proposes a method to detect the security vulnerabilities during the design phase of software development. This approach simulates attacks according to the misuse patterns using model testing method. With this approach, one is able to analyze system security vulnerabilities during the design stage of the system development. The practical examples provide evidences to the feasibility of the proposed method.
DOI: 10.14457/cu.the.2014.234
title: Financial Feasibility of Energy-Saving Residential Condominium

description: Condominiums have shown steady growth in supply in Thailand. These buildings have high energy consumption, and with the world’s energy crisis, it is important to make condominiums more energy efficient. However, the business side also requires due consideration. An energy efficient design must be at least as profitable as typical designs for project owners to have an incentive to invest. The study aims to improve the typical design of a condominium to reduce energy use within the building, and to determine whether the modification is financially feasible. The study used a standard condominium design available in the Thai market that is less than 23 meters high and has an area of no more than 10,000 square meters as a case study. In the first part, the paper examines the energy-saving benefits gained from modifying the typical condominium design for 27 m2 unit buyers. First, reduce heat entering the building through the outside building envelope. The cooling load of each unit is calculated using the formula Q=U*A*CLTD for external envelopes, and Q=U*A*ΔT for internal walls. Then the load is converted into energy expenses of buyers. The reduced expense on energy over a 10-year period is then calculated into net present value (NPV) to determine the buyer’s benefit in monetary terms. The second part of the study aims to find the financial feasibility of an energy-efficient condominium. The study looked at the feasibility of a typical condominium and an energy-saving condominium. This part looks at the profitability of both the typical and energy-saving condominium projects for comparative study. The thermal load of a 27m2 unit includes the envelope, the floor, inner walls, regular human activity, equipment and appliances, and infiltration. The result found that the peak load of the typical design is 27,707.91 btu/ft2◦h; the peak load of the energy-saving design is 11,067.63 btu/ft2◦h. The design saves energy by approximately 60%. Owners gain the benefit of saved expenses from a minimum of 4,000 per year to 16,741.50 Baht per year at maximum. The construction cost of a typical design is 433,994.14 Baht/unit, and 498,193.36 Baht/unit for the energy-saving design which is 15% higher. Developers can have the same net profit after tax if price of the energy-saving design is increased to 1.23M Baht from the typical selling price at 1.16M Baht. Buyers must absorb the increased cost of 70,000 Baht, but the earning from decreased energy cost payback within a minimum of 4.2 to a maximum of 17.7 years. Energy-saving condominiums can be as profitable as the typical condominiums for developers, cost friendly for buyers, and help Thailand become more eco-friendly by reducing CO2 emission by 207 tons per day.