cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/cu.the.2014.320
title: COMPARATIVE STUDY OF N2O FORMATION DURING THE SELECTIVE CATALYTIC REDUCTION OF NO BY NH3 IN THE PRESENCE AND ABSENCE OF O2 CONDITIONS

description: The present work investigates the formation of N2O during the SCR of NO with NH3 over V2O5/TiO2, WO3/TiO2, MoO3/TiO2, V2O5-WO3/TiO2 and V2O5-MoO3/TiO2 catalysts. All catalysts are characterized by using BET surface area measurement, XRD, FT-IR, NH3-TPD, Pyridine adsorption, and ICP-OES. The effluent gas in the SCR experimental contains 120 ppm NO, 120 ppm NH3, 30 ppm SO2, 15 vol% O2, and 15 vol% H2O, balanced with N2. The reaction is carried out in the reaction temperature 120-450°C. A gas chromatograph Shimadzu GC-2014 equipped with an ECD is used to measure the amount of NO and N2O in the effluent gas. The effect of SO2 on the formation of N2O during the SCR process over the catalysts is tested by removing SO2 from the feed gas. The effect of O2 on the formation of N2O during the SCR process over the catalysts is tested by removing O2 from the feed gas. The results show that O2 is necessary for the SCR of NO by NH3 over WO3/TiO2 and V2O5-WO3/TiO2 catalysts. The SCR of NO over V2O5/TiO2, MoO3/TiO2 and V2O5-MoO3/TiO2 catalysts can proceed in the absence of O2, but at a higher reaction temperature with a large amount of N2O form. The results demonstrate that lattice oxygen (O-2) of V2O5/TiO2, MoO3/TiO2 and V2O5-MoO3/TiO2 catalysts can participate the SCR process at the high reaction temperature. O-2 on MoO3/TiO2 and V2O5-MoO3/TiO2 catalysts is participate to increase N2O formed from the SCR process. N2O is formed from the reaction between NH3 and O2 rather than NO.
DOI: 10.14457/cu.the.2014.321
title: A DESIGN AND DEVELOPMENT OF CAMERA CONTROLLER AND DATA LOGGER IN UNMANNED AERIAL VEHICLE (UAV) FOR AERIAL MAPPING

description: Generally, an aerial mapping requires image with good quality such as clear image, nearly vertical image, including more overlapping image, as well as constant interior orientation, exterior orientation parameters and ground control point (GCP), all of which are necessary for image processing to generate the orthophoto map. Therefore the control of imaging and data logging system are important and very useful. However, these kind of systems are generally not supported in UAV platform. This research will present the designing and creating of 2-axis brushless gimbal (camera controller), including the development of data logger for using in unmanned aerial vehicle (UAV) platform, particularly multi-rotor UAV (or Drone). Which these developed tools will be used in order to control and stabilize a camera for vertical imaging to get a nearly vertical image, as well as data logging of exterior orientation parameters for digital image processing and georeferencing in aerial mapping. The prototype of 2-axis brushless gimbal is capable of rotating around X-axis (roll) and Y-axis (pitch) in a range of maximum at -45º to 45º by using Brushless DC (BLDC) motor, which helps the camera stabilize smoothly. The results of the experiment shows better quality of images that are derived from developed 2-axis brushless gimbal and data logger. Images were tilted in range of -1.889º to 2.099º and -1.247º to 1.625º of roll and pitch angles respectively. In addition, all exterior orientation parameters of each image can also be recorded to facilitate aerial mapping processing.
DOI: 10.14457/cu.the.2014.322
title: SITUATIONAL ANALYSIS IN STRATEGIC FRAMEWORK FOR SUSTAINABLE IMPLEMENTATION OF PRECAST CONCRETE FOR LOW-COST HOUSING IN INDONESIA

description: The aim of this research was to conduct situational analysis of industrialized precast concrete by assessing its sustainability criteria to build low-cost housing in Indonesia. The stakeholders interviewed included the Indonesian Government as the owner and donor policy, the precast concrete manufacturers, the contractors and consultants/designers of the construction industries. The Analytical Hierarchy Process AHP hybrid method was used to assist the quantification of SWOT analysis in Internal Factors Analysis Summary (IFAS) and External Factor Analysis Summary (EFAS) framework. There were thirty-three strategic factors listed in this research derived from five pillars of sustainability namely economic value, ecological performance, social equity and culture, technical quality, and implementation and enforcement. The fact finding revealed that there is no significant difference among various stakeholder organizations in responding the thirty-three strategic factors. The stakeholders also agreed upon the same three-most important factors under each SWOT category; although prioritization among stakeholders is vary. Moreover, the strengths outweighed the weaknesses in the IFAS and the opportunities outweighed the threats in the EFAS. According to the total weighted score calculation of IFAS and EFAS, the position of precast concrete implementation for low-cost housing in Indonesia was located in Strength-Opportunity Quadrant, which implied the possibility of Growth. Finally, sixteen critical factors were considered significant in improving sustainability efforts for precast concrete implementation.
DOI: 10.14457/cu.the.2014.323
title: IMPLEMENTING BUILDING INFORMATION MODELING (BIM) FOR CONSTRUCTION RISK MANAGEMENT IN DESIGN-BUILD PROJECTS

description: Building information modeling (BIM) is an innovative concept for construction management, which can benefit all stakeholders in several aspects, including project risk management. However, there have been limited studies about the relations between risk and BIM, as well as the implementation of BIM for construction risk management, particularly in design-build (DB) projects where most risks are transferred to the DB contractors. This research proposes BIM uses that are appropriate for managing different construction risks. A total of 20 DB project risks were compiled from past literature and verified through in-depth interviews with BIM and DB project experts, and 30 BIM uses were identified and reviewed thoroughly. A risk-BIM use framework was created based on the common attributes of risks and BIM uses, including risk factors, BIM use purposes, project lifecycle, facility elements, and responsible parties. The proposed framework consists of five main steps: (1) detail setting, (2) BIM use purpose analysis, (3) risk investigation, (4) BIM use filtering, and (5) matrix update. An important result is a risk-BIM use relation matrix, which provides all potential BIM uses to manage critical project risks. A guideline on utilizing BIM uses for risk management is elaborated. The proposed framework was verified through three case studies of BIM-adopted DB projects in the Philippines. The important factors considered in selecting the optimal BIM uses for risk management are analyzed based on the BIM uses each case study actually implements as compared with those suggested by the proposed framework. Such factors are educational background and capability of contractors, project size, upfront cost, pilot projects, learning curve and eagerness to adopt, internet, client demand, government support, and governing body. The results can be used to establish a comprehensive BIM-based system for managing construction risks.
DOI: 10.14457/cu.the.2014.324
title: A DEVELOPMENT OF KNOWLEDGE-BASED MODELS FOR CHECKING DESIGN ERRORS IN BUILDING CONSTRUCTION PROJECTS IN CAMBODIA

description: This research aims to develop the knowledge-based models for helping the engineers to check the design errors which possibly occur throughout the construction practices. This research is divided into two main parts. The first part attempts to identify the critical cases of design errors between structure and other building components in building construction projects. The questionnaires were distributed to the engineers of contractors in Cambodia. The percentage formulas were applied to determine the percentage occurrence of each case of design errors whereas impact value of each case was calculated by average mean score. The combination of percentage occurrence and impact was used to rank the cases of design errors with the priority zones of risk analysis. This ranking is useful for engineers to concern about the most critical cases of design errors during construction phase. 48 cases were found as the critical design errors that should be concerned. The second part of this research is the development of knowledge-based models for checking design errors. The cases of critical design errors were collected from interviewing the engineers of contractors based on their previous experience and knowledge. The cross-case analysis revealed the main attributes and conditions of each case, which were then used as the inputs in the decision tree of the models. Last, it was proposed to code these decision trees into a system by using Visual Basic programming in Microsoft Excel. This prototype system can help the engineers to check the conditions of attributes that can lead to problems of design errors before construction begins.
DOI: 10.14457/cu.the.2014.325
title: SCENARIO-BASED MODEL OF CHANGE ISSUE LEADING TO CONFLICTS IN BUILDING CONSTRUCTION PROJECTS IN CAMBODIA

description: Change is inevitable and becomes one of the critical issues in construction projects. Although many research papers have been conducted in the areas of causes, impact and management of changes, project practitioners still have the difficulty to manage changes. Novel concept of change management should be proposed by focusing on the relationship of conflict aspect. This research attempts to identify change issues leading to conflicts related to time, cost and quality between owner and contractor in building construction projects in Cambodia. It also aims to develop scenario-based model of a significant change issue leading to different levels of conflict. The questionnaire with five-point Likert scale was selected as a tool for data collection in the first part. One sample t-test was analyzed to identify the level of importance on significant change issues. The research findings reveal that the top change issue leading to time conflict is schedule change due to poor planning or scheduling from contractor. The most critical change issue for cost aspect is schedule change by owner. Change due to construction errors is the most important issue in terms of quality conflict. In the second part, scenario-based model was developed by morphological analysis. This part focused on exploring conflict situations from aspect of change due to poor and incomplete design. The technique breaks down each collected case in order to determine crucial attributes and conditions. Those attributes and conditions were used to simulate the scenarios that created the tendency of conflict in different levels. The scenario-based model provides clear understanding to project parties about the relationship between change issues and conflict levels under different situations.
DOI: 10.14457/cu.the.2014.326
title: EVALUATION OF DROUGHT STRESS RESPONSES OF RICE Oryza sativa L. WITH GENETIC BACKGROUND OF 'KDML105' RICE AND DROUGHT TOLERANCE GENES ON CHROMOSOME 4

description: Rice (Oryza sativa L.) is one of the most essential food of people around the world, especially ‘KDML105’ which is widely known for its great mouthfeel and aroma. Drought stress has long been a major problem affecting rice productivity. However, drought-tolerant cultivars has been developed to overcome this problem. In this study, four chromosome substitution lines (CSSLs) from back-crossing of ‘KDML105’ and DH212 were used to evaluation of proper drought responsive traits in rice seedlings. The experiment was carried out with three water levels consist of 100%, 75%, and 50% field capacity. Results showed that chlorophyll fluorescence (Fv/Fm ratio) and stay green score were suitable parameters for the selection of drought-tolerant lines. Moreover, this study also showed that the difference in drought tolerance capability was due to genetic variation.
DOI: 10.14457/cu.the.2014.327
title: DETERMINATION OF SOIL WATER CONTENT BY GROUND PENETRATING RADAR METHOD IN THE CENTER OF LEARNING NETWORK FOR THE REGION, CHULALONGKORN UNIVERSITY, CHANGWAT SARABURI

description: Determination of volumetric soil water content (VSWC) is essential in many fields such as agriculture, hydrology, and ecology, etc. Currently, there are several methods to determine VSWC for example gravimetric, time-domain reflectrometry (TDR), capacitance probe methods, etc. In this research, ground penetrating radar (GPR) was used to determine VSWC of a loamy soil at experimental field in the center of learning network for the region, Chulalongkorn University, Changwat Saraburi, Thailand. The GPR was set up in the ground wave fixed offset method with 400 and 900 MHz central frequency antennas, which have transmitter and receiver offsets of 1.00 m and 0.405 m, respectively. By estimate the relative dielectric permittivity of soils, these values were converted to VSWC by Topp’s equation. The results of VSWC calculated from soil samples at different depths (10, 20 and 30 cm) were used as the references. Besides, there were three experiments to see how GPR can detect variation of VSWC with times. The results revealed that GPR 400 MHz has high correlation with gravimetric method at dry condition at depth of 10 to 30 cm with VSWC about 10 to 15%. And at wet condition, the result is reasonable at depth 10 to 20 cm with VSWC around 30%. GPR 900 MHz is not related to gravimetric method but the results are looked well in dry condition. In the time monitoring of VSWC, the results of GPR 400 MHz in three experiments changed with time, but not for GPR 900 MHz. So, GPR method is appropriate for estimating VSWC due to the easy of data acquisition and processing. In addition, the soil water content from capacitance probe was not reliable when comparing to the VSWC from gravimetric method due to the limitation of experiment.
DOI: 10.14457/cu.the.2014.328
title: PREVALENCE OF N-TERMINAL MUTATION OF PYRUVATE KINASEAMONG VULNERLABLE MALARIA-RISK POPULATION IN SOUTHEAST ASIA

description: Pyruvate kinase (PK) is an important enzyme in glycolysis pathway, which has function in producing ATP for cellular activities. Mutation of PKLR gene causes a hematological disorder, known as PK deficiency (PKD). It has been observed that hemolytic disorder is the key to protect against malaria infection and to reduce the severity of malaria. Recently, a novel mutation at N-terminus of PK has been found in Southeast Asian population. This mutation results in a change of amino acid residue 41 from arginine (R) to glutamine (Q) and is designated as PKLRR41Q. However, the prevalence and association between PKLRR41Q and malaria in human is not known. The results from 267 malaria patients showed that the prevalence of PKLRR41Q was 4.87% with allele frequency was 0.026. The association study demonstrated that the number of parasite attacks was significantly higher in patients with PKLRR41Q than in patients without PKLRR41Q (p=0.001). The allele frequency of PKLRR41Q with hyperparasitemia (P. falciparum: 0.100 and P. vivax: 0.104) was higher than none hyperparasitemia (P. falciparum: 0.051 and P. vivax: 0.023). Odds of hyperparasitemia was higher in patients with PKLRR41Q than in patients without PKLRR41Q (P. falciparum; OR: 2.18, 95% CI: 0.340 - 14.096, p= 0.410, P. vivax; OR: 4.20, 95% CI: 0.709 - 24.880, p= 0.114). Moreover, the reticulocyte count in patients with PKLRR41Q was increased, compared to that of patients without PKLRR41Q (p=0.700). It is speculated that increasing of reticulocyte in patients with PKLRR41Q could be due to hemolysis from infection and PKD and could contribute to proliferation of parasites. These findings suggest that PKLRR41Q is a common PKLR mutation in Southeast Asian population. The presence of PKLRR41Q may increase a tendency of number of parasite attacks and hyperparasitemia.
DOI: 10.14457/cu.the.2014.429
title: Modification of sludge from tap water production by iron for arsenic ions adsorption followed by solidification using cement

description: Sludge of tap water production from the Metropolitan Waterworks Authority (Bangkhen, Thailand) was modified by iron via borohydride reduction of ferric chloride. The modified sludge with 10% (w/w) iron was used as an adsorbent for arsenic removal from arsenic-contaminated water. The modified sludge was characterized by inductively coupled plasma-optical emission spectrometry (ICP-OES), x-ray fluorescence spectrometry (XRF), x-ray diffraction spectrometry (XRD), scanning electron microscopy with energy dispersive x-ray spectrometry (SEM-EDS), transmission electron microscopy (TEM) and surface area analysis. Then, factors affecting the adsorption of arsenite and arsenate were studied. The optimal pH was 3.0. The equilibrium adsorption of both arsenite and arsenate was reached within 1 hour. The maximum adsorption capacity was found to be 24.15 and 35.71 mg/g for arsenite and arsenate, respectively. High concentrations of phosphate, sulfate and humic acid caused a decrease in arsenite and arsenate removal efficiency. Moreover, the iron(0)-modified sludge was applied to remove arsenic from wastewater, surface water and ground water samples. All results showed that the iron(0)-modified sludge was effective for arsenite and arsenate removal from water. Furthermore, the sludge obtained after arsenic removal process was stabilized/solidified using a mix proportion of 60% (w/w) cement. The leaching characteristic of arsenic studied by dynamic monolithic leaching test (DMLT) showed that arsenic was hardly leached from the solidified waste. Its leaching mechanism was controlled by diffusion at the beginning and the depletion had occurred at the end of leaching process.
DOI: 10.14457/cu.the.2014.430
title: Orthogonal Graphs Over Finite Commutative Rings of Odd Characteristic

description: Let (V β)be an orthogonal space over a finite commutative ring R of odd characteristic. We determine the structure of V when R is a finite local ring. We define a graph for V called an orthogonal graph. We show that our graph is vertex and arc transitive and determine the chromatic number of the graph. Moreover, if R is a finite local ring, we can classify if it is a strongly regular or quasi-strongly regular graph and we obtain its automorphism group.
DOI: 10.14457/cu.the.2014.431
title: Rigorous bounds on greybody factors for various types of black holes

description: One of the quantum effects of black holes is Hawking radiation. Scattering of Hawking radiation from a gravitational potential barrier, resulting from the curvature of spacetime, is analogous to the scattering of matter wave from a potential barrier in quantum mechanics. In the context of black hole radiation, the transmission probability is known as greybody factor. In this dissertation, rigorous bounds on greybody factors for non-rotating black holes, Kerr-Newman black holes, and dirty black holes are derived. For non-rotating black holes, including dirty black holes, calculations of rigorous bounds on the greybody factors are simple. However, for a Kerr-Newman black hole, which is a type of rotating black holes, the situations are more complicated since the rigorous bounds on the greybody factors depend on scalar angular momentum mode. Moreover, there is a new phenomenon called super-radiance that arises in rotating black holes, which is absent in the non-rotating black holes.
DOI: 10.14457/cu.the.2014.432
title: Analysis of rotative mappings on R

description: In this work, we prove a fixed point theorem of rotative mappings on the set of real numbers and determine the fixed point sets of these mappings. Also, the rotativeness of mappings in some classical classes in fixed point theory is investigated.
DOI: 10.17632/7zr49hyhz3.1
title: Data for:Revisiting the Data Reduction of Seafloor Heat-Flow Measurement: the Example of Mapping Hydrothermal Venting Site around Yonaguni Knoll IV in the South Okinawa Trough

description: Original temperature record made by Lister-type heat probe around Yonaguni Knoll IV in South Okinawa Trough. The heat probe consists of 12 thermistors in 6 meters long and releases a heat pulse after the penetration.
DOI: 10.14457/cu.the.2014.329
title: Prevalence of Cardiovascular Complications and Anti-platelet Therapy Used among Thai Type 2 Diabetes Patients in 2012

description: Background: Diabetes Mellitus type 2 (T2DM) is one of the global pandemic that can cause several chronic complications. The macro vascular complication is able to be prevented somehow by anti-platelet therapy. The primary and secondary prevention programs were analyzed at different levels of cares among Thai T2DM patients in 2012. Objective: To describe the prevalence of cardiovascular complications and the percentage of anti-platelet prescriptions without and with cardiovascular complications events at different levels of cares among Thai T2DM patients in 2012. Materials and method: This study was part of the Thailand DM/HT study. The data was retrospectively collected from the medical records from a stratified sampling of public hospitals under Ministry of Public Health and hospitals and clinics in Bangkok that under the national health security office program, altogether 602 institutes. The authors used this secondary source data set to analyze. Results: Of the 29,374 T2DM patients, 5.8% (95% CI: 5.6 to 6.2) had overall cardiovascular complications and 7%, 8.2% and 4.6 % were from regional center hospital, provincial general hospital and community hospital respectively. Overall 84.8% (95% CI: 82.9 to 86.6) of T2DM patients with cardiovascular complications were prescribed anti-platelet medications and 57.1% (95% CI: 56.5 to 57.7) of patients with no cardiovascular complications were prescribed anti-platelet therapy. Most patients with cardiovascular complications went to community hospital for anti-platelet drugs. Prescriptions in non-cardiovascular complications group were more likely in male and older patients, history with quit smoking and hypertension patients. Conclusion: The overall prevalence of cardiovascular complications in Thai T2DM patients in 2012 was in the range of expectation. The use of anti-platelet therapy as secondary prevention was lower than the target figure of 90%.