cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14455/isec.res.2017.121
title: APPLICABILITY OF WIDE-RANGE ULTRASONIC TESTING TO NON-DESTRUCTIVE INSPECTION OF GROUT CONDITION IN PRESTRESSED CONCRETE BRIDGES

description: Complete grouting of tendon ducts is important for durability of post-tensioned prestressed concrete (PC) bridges. Voids in the ducts may induce failure of PC tendons, possibly causing a reduction in load capacity and collapse of the bridge. The wide-range ultrasonic testing (WUT) is one of the non-destructive inspection techniques. The focus of this study is to examine the applicability of the WUT to grout inspection. This paper summarizes the characteristics of the non-destructive methods available for the PC grout inspection and outlines the sensing and analyzing techniques of the WUT method performed in practice in PC bridge construction. The inspection accuracy of the WUT method was examined by comparison to a sensor-based inspection method. This paper also reports comparative investigation and discusses the advantages of the WUT method including inspection accuracy, cost performance, time efficiency and safety. It was confirmed in on-site application that the WUT method was capable of determining grout condition at a concrete cover depth of 250 mm.
DOI: 10.14455/isec.res.2017.123
title: Resilient communities for safe cities

description: The increase in the intensity and frequency of natural disasters in recent years require new methods and tools to deal with this change. New approaches must be developed to ensure the safety of cities and settled communities from these events. Implementing the resilience of a territory requires an integrated approach to act simultaneously on physical, economic and social reality. The described research had investigate on possible tools to really improve physical and social dimension. Resilience is assumed as a paradigm within the project for the construction / transformation of the built environment. Is highlighted the fundamental role of the social component in determining priorities and security issues for each specific context. Physical and social environment are characterized, therefore, as an inseparable dyad for any action aimed at strengthening the resilience and safety of the environment built. In the implementation process of the resilience of an urban system, two closely interrelated areas are identified: on one hand the community capability of implementing organizational-procedural adaptability; on the other, the physical space and the natural dimension, as a place of construction of the technological-spatial convertibility, and the ecological and environmental responsiveness. Among the several conditions to ensure adequate levels of connection and correlation with ecological factors, topological, social and technological developments of the built environment, in this paper are described those related to risk communication as fundamental first tool.
DOI: 10.14455/isec.res.2017.22
title: Validation of a Re-Equilibrium Decision Support System for PPP Contract

description: A re-equilibrium model was developed which ensures that the rights of the Public Private Partnership (PPP) project stakeholders are preserved during renegotiation and minimizes the chances of disputes. The model develops the typical renegotiation scenarios which include: increasing the service charges, increasing the concession period, or paying a lump sum amount to the party of concern in order to maintain a fixed rate of return and keep the return on equity constant. Moreover, a decision support system was developed with the aid of Microsoft Excel 2013, Visual Basic for Applications (VBA) programming language, and the Precision Tree 5.5 for Excel add-in, in order to facilitate the process of selecting the optimum scenario which maximizes the satisfaction of both parties (the private sector and the public sector). In this paper, data is obtained from a case study of a wastewater treatment plant in Egypt, and applied to the proposed model. The results obtained from the model are close to the ones obtained from the Independent Financial Expert (IFE) of the wastewater treatment plant project. This verifies and validates the objectives of the model.
DOI: 10.14455/isec.res.2017.96
title: Thermal resistance of Alkali Activated Slag Concrete

description: This study investigated the thermal resistance of Alkali Activated Slag (AAS) concrete. Alkali Activated Slag cement is an environmentally friendly alternative to Portland cement, which can be produced by using an alkaline solution to activate the binding effect of the blast furnace slag. Heat from fire changes the physical and mechanical properties of concrete. Given the decisive role of thermal resistance in the operation and performance of structures, it is necessary to evaluate the effect of heat on the performance of AAS concrete. In this study a series of tests were arranged to examine the effect of slag percentage on thermal resistance of AAS concrete. AAS concrete samples from mixes, with different slag percentage, were subjected to 20, 200, 400, 600 and 800 Celsius degree temperature and change in their compressive strength were measured and compared with that of samples made by ordinary Portland cement concrete. The results show that the thermal resistance of AAS concrete is higher than ordinary concrete.
DOI: 10.14457/kku.res.2012.76
title: ประสิทธิภาพการเป็นสารลดความดันเลือดและต้านออกซิเดชันของ เปปไทด์จากรำข้าวหอมมะลิ
DOI: 10.14457/kku.the.2012.12
title: การประยุกต์ใช้ปฏิกิริยา LAMP เพื่อเพิ่มความแม่นยาในการคัดเพศ ตัวอ่อนโคเนื้อและแพะพื้นเมืองไทย
DOI: 10.14457/mju.res.2014.7
title: การพัฒนาอุปกรณ์การเหนี่ยวนำการเป็นสัดเพื่อใช้กำหนดเวลาการผสมเทียม
DOI: 10.14457/mju.the.2014.74
title: การโคลนยีนและการศึกษาคุณสมบัติของยีนควบคุมการสังเคราะห์แอนโทโซยานินในข้าว
DOI: 10.14457/mu.the.2014.118
title: ความสัมพันธ์ระหว่างโครงสร้างกระบวนการและผลลัพธ์ด้านความพึงพอใจในการดูแลเท้าของผู้สูงอายุโรคเบาหวานที่มารับบริการโรงพยาบาลส่งเสริมสุขภาพตำบล
DOI: 10.14457/mu.the.2014.119
title: ปัจจัยทำนายภาวะช็อคจาการเสียเลือดของผู้ป่วยบาดเจ็บรุนแรงแรกรับ ณ ห้องฉุกเฉิก
DOI: 10.14457/mu.the.2015.22
title: ผลของโปรแกรมการให้ข้อมูลเสริมแรงจูงใจและทักษะการรับประทานยาจับฟอสเฟต ต่อความสม่ำเสมอในการรับประทานยาจับฟอสเฟตในผู้ป่วยฟอกเลือดด้วยเครื่องไตเทียม
DOI: 10.14455/isec.res.2017.10
title: Behaviors of slip-critical bolts in combination with fillet welds

description: According to the Specification for Structural Steel Buildings (AISC 2010), slip-critical bolts can only share load with longitudinal welds in a joint. Moreover, the bolt available strength shall not be taken greater than 50% of the bearing-type. This paper presents the result of a series of joint tests verifying the specification. The joints were tested in a manner similar to previous work (e.g. Manuel and Kulak 2000). The slip strength values of JIS F10T and F14T bolts were tested and compared. Transverse and longitudinal fillet welds with a leg size of 12 mm and the same amount of weld material were adopted and tested respectively. The strength ratio between bolts and welds changes from 5/8 to 6/9 in the combination joints. The result shows that in the combination with longitudinal welds, the bolts tend to slip and contact the plates, developing greater bearing strength. In the combination with transverse welds, the bolts slip and the pretension decreases greatly. But the combination also causes the fracture surfaces of transverse welds to change, providing additional strength to compensate the decrease in bolt slip strength. The combination joints therefore can develop strength greater than the sum of slip strength and fracture strength.
DOI: 10.14455/isec.res.2017.119
title: CHALLENGES OF DESIGN-BUILD METHOD IMPLEMENTATION IN PUBLIC WORKS PROJECT DELIVERY

description: Infrastructure, including public works, plays a very important role in supporting a nation
DOI: 10.14455/isec.res.2017.120
title: Public non-consultation related delays in Delivery of Mega Projects

description: Since 1994 the post-Apartheid new dispensation introduced policies that sought to effect equity in all spheres of life, Mega Projects have become indispensable as their sheer size could have an immediate impact on the intended beneficiaries. However the widespread public protestations and rolling juristic disputations have delayed most of these schemes due to costly schedule revisions. The objective of this study is to assess the delays that are directly caused by public discontentment with the projects' implementation. The two biggest Mega projects in the energy sector, Medupi power station and Kusile power stations are used as case studies to assess the delays caused by the endemic protests in the country. Interviews were held with, local communities, top government officials and professionals involved in the implementation of these projects. It was observed that most of these projects are hastily implemented with abnormally heavy pressure from the authorities in order to avoid political embarrassment. The rushed implementation leads to superficial public consultation which results in a lack of psychological contract with the local communities. Up to 30% of delays could be attributed to downtime, picketing, intimidation of workers, sabotage and general disruptions in order to demonstrate disaffection with the implementation of the projects. If consultation could be all-encompassing, meaningful and target critical stakeholders much better improved project delivery could be achieved.
DOI: 10.14455/isec.res.2017.126
title: Microstructure, Texture, and Mechanical Properties of Geopolymers Prepared using Industrial Waste

description: Alkali activation presents a prospective possibility for the reuse of waste brick powder, though it should be noted that ceramic materials were a subject of alkali activation only rarely to date, probably due to the technological difficulties accompanying the preparation process. In this case the binder can be prepared while avoiding the Portland cement entirely. Therefore, the environmental benefits are even more remarkable than if the brick powder is used as a supplementary cementing material replacing only a part of cement.In this paper, several geopolymer mixes are designed, using waste brick powder as the main component and a combination of water glass and sodium hydroxide as alkali activator. At first, the hardened mixes are subject of detailed material characterization experiments, including microstructural studies using scanning electron microscopy, textural studies by mercury intrusion porosimetry, and qualitative and quantitative X-ray diffraction analyses. Then, their functional properties are assessed by the measurement of basic physical properties and mechanical parameters. Experimental results show satisfactory performance of all analyzed mixes which makes good prerequisites for their practical application as an environmental friendly alternative to cement-based materials.
DOI: 10.14455/isec.res.2017.135
title: ASSESSING THE BEHAVIOR OF COLUMN-SPLICE CONNECTIONS BETWEEN CFSTS IN AXIAL TENSION

description: Increasing the sustainability of construction materials is a key goal in the construction industry. As the demand for high-rise residential structures grows, new more efficient methods of achieving sustainability are required. Rendering larger structures demountable to enable the re-use of steel structural members is one solution. The aim of this study was to investigate and assess the behaviour of blind bolted column-column connections between concrete filled steel tubes in axial tension. The investigation aimed to address the need for accurate design guidelines for tensile members in the composite design standards such as Eurocode 4 and encourage the use of column-column connections in large-scale demountable structures. A numerical investigation of the blind bolted column-column connection has been performed using ABAQUS. The model consisted of two concrete filled square hollow steel sections connected using sleeve plates welded to the top tube only, as well as 16 M20 Lindapter Hollo-bolts connecting the tubes. The numerical investigation revealed that the sections tested conformed with AS1170.1 regarding columns in tension. Results of the numerical investigation have been compared against experimental results for a continuous CFST and it was found that the connections performed better in tension. The parametric analysis revealed no dependence of the shape of force-displacement relationships on diameter to thickness ratio, concrete compressive strength or yield stress.
DOI: 10.14455/isec.res.2017.141
title: NUMERICAL ANALYSIS OF CONCRETE BEAMS REINFORCED WITH GLASS FIBER REINFORCED POLYMER BARS

description: The use of Fiber Reinforced Polymer (FRP) bars to reinforce concrete beams has received great attention in the past decade due to their corrosion resistance, high tensile strength, and excellent non-magnetic properties. Glass FRP (GFRP) reinforcing bars have gained popularity due to the relatively lower cost compared to Carbon FRP (CFRP) bars. In this study, sixteen concrete beam finite element models were created using the finite element computer program ANSYS to perform linear and non-linear analyses. Twelve beams were longitudinally reinforced with GFRP bars, while the remaining four beams were reinforced with conventional steel bars as control specimens. In terms of mechanical properties, FRP reinforcing bars have lower modulus of elasticity compared to conventional reinforcing steel and remain linear elastic up to failure. This leads to lack of plasticity and a brittle failure of beams reinforced with FRP bars. The objective of this study is to investigate flexural behavior of concrete beams reinforced with GFRP reinforcing bars. Some of the parameters incorporated in the numerical analysis include longitudinal reinforcement ratio and compressive strength of concrete, both of which affect the flexural capacity of beams. It is shown in this study that replacement of traditional reinforcing steel reinforced bars by GFRP bars significantly decreases mid-span deflection and increases ultimate load. The strain distribution along GFRP longitudinal reinforcing bars is totally different from that of traditional steel bars.
DOI: 10.14457/kku.res.2009.154
title: การพัฒนาเครื่องสำอางชะลอความแก่จากนํ้ามันหอมระเหยไทยที่มีศักยภาพโดยใช้ระบบนาโนเทคโนโลยีในการนำส่ง
DOI: 10.14457/kku.res.2012.74
title: นวัตกรรมผลิตภัณฑ์เมลาโทนินเพื่อเสริมประสิทธิภาพการรักษาและเพิ่มคุณภาพชีวิตผู้ป่วยโรคมะเร็ง
DOI: 10.14457/mju.the.2014.73
title: ผลของการเพิ่มอุณหภูมิจากพลังงานแสงอาทิตย์ในบ่อเลี้ยงปลา ต่อการเจริญเติบโตของปลาดุกรัสเซีย
DOI: 10.14455/isec.res.2017.132
title: Structural Design and Analysis of High-Rise Building Using Ultra-Lightweight Floor System

description: Abstract - The main objective of this paper is to study feasibility of using ultra-lightweight (ULW) slab as an alternative design solution for floor component used in high-rise buildings. The main method is numerical case study by comparing the structural performances of 60-storey building in which floor component designed using one type of ULW called cross laminated timber (CLT) relative to floor component designed using conventional reinforced concrete (RC) slab using ETABS. The structural performances were compared between the two types of floor system including: total drift, inter-story drift, and base reaction which results in smaller frame sections and less reactions for the foundation demands by using ultra-lightweight (ULW). Additional study in term of survey to assess the awareness level of the public and engineering professionals about general high-rise building demand and new alternative building materials such as timber and its potential application in Saudi Arabia was also conducted.
DOI: 10.14455/isec.res.2017.148
title: NUMERICAL PARAMETRIC STUDIES FOR THERMOGRAPHIC INSPECTION IN CONCRETE

description: Thermographic imaging technique provides a practical tool for the detection of subsurface delaminations in concrete from a distance without direct access to the surface. In the previous study, a numerical model to predict the thermal contrasts resulting from subsurface voids (i.e., delaminations) in concrete under a given set of environmental conditions was developed using the finite element method. The model was verified using the experimental test data, and the results indicated that the model could be an effective tool to support the thermography inspection of the concrete. In this present study, the use of the verified model to evaluate the effects of other key parameters expected to influence the detectability of the subsurface voids, such as the depth and thickness of a subsurface delamination. The effect of these parameters on the thermal contrast developed on the surface above a subsurface delamination was assessed under a specific set of environmental conditions. The results shown that the maximum thermal contrast decreased exponential by a constant multiple of 0.98 as the void depth increased and the maximum thermal contrast increased nonlinearly with increasing thickness of the void.
DOI: 10.14455/isec.res.2017.152
title: ANALYSIS OF SPACE FRAMES WITH GENERALIZED SEMI-RIGID CONNECTIONS

description: A mechanical model and analytic method are proposed, in which, the axial, the shearing and the bending semi-rigid characteristics of space frames are taken into account. An independent zero-length connection element comprising six translational and rotational springs is used to simulate the beam-to-column connection. The model, namely six-spring mechanical model, has an advantage that the element number of structure does not increase. The matrix displacement method is used to analyze mechanism of the model, including element analysis and structural analysis. The stiffness matrix of the element is derived. Some reaction forces at the end of the element are obtained when it is subjected to two kinds of different loads respectively. The obtained stiffness matrix gets the characteristics of symmetry and singularity and that makes the size of total stiffness matrix for semi-rigid frame the same as that for frame with rigid joints.
DOI: 10.14455/isec.res.2017.158
title: DYNAMIC ANALYSIS OF FIBER-REINFORCED POLYMER COMPOSITE ELECTRIC POLES

description: This paper presents finite element modeling of tapered FRP poles in ABAQUS for dynamic analysis. Modal analysis and transient dynamic analysis are presented in order to evaluate the effect of fiber orientation, taper ratio, number of layers and lamina thickness on the dynamic properties of tapered poles. Trends observed from parametric studies on the analyses of the FRP poles are enumerated. In addition, the effect of rectangular dynamic excitations on the overall response of the poles is presented representing impulsive loadings that may occur due to wind gusts or loss of cable tension supporting the FRP poles. Result shows that the fundamental frequency of the poles decreased as the fiber-orientation increased up to 60 degrees. In addition, the fundamental frequency of the poles increased as the number of layers increased. No significant difference was observed in natural frequency when varying the lamina thickness without changing the overall laminate thickness. The fundamental frequency of the poles decreased by 10% as the taper ratio increased from 0.4 to 1. Transient dynamic analysis showed that poles with higher fiber orientation angle had the larger maximum tip deflection. However, only small differences were observed when the deflections are normalized as the ratio of the maximum dynamic to static deformation.
DOI: 10.14455/isec.res.2017.33
title: Professional Education for Design Management in the Context of Industrial Projects

description: Studies on developments in the Brazilian civil construction report there is still a disconnection between the design phase and implementation in addition to a lack of management and coordination of effective design. This frequent dissociation compresses the time and cost of a project development to be understood as an isolated instrument. In this context, it is understood that the academy significantly influences the practices exercised by professionals in the labor market. The fragmented form of education currently adopted does not provide a collaborative environment, affecting the integration of the various agents involved in the development of the project and during the execution of the building. Thus, the main objective of this study is to evaluate the influence of vocational training in project management activities by applying a case study of a large project.As a result, it was observed that the company studied could have presented better management and coordination of the design process. Similarly, it could have reduced costs and project development time if it had applied an effective risk management to avoid negative impacts and losses. The conclusion was that management concepts provide important inputs to the professional training of construction agents.
DOI: 10.14455/isec.res.2017.42
title: SPATIAL REGRESSION ANALYSIS FOR MODELING THE SPATIAL VARIATION IN HIGHWAY CONSTRUCTION COSTS

description: Price volatility in wages, materials, and equipment has a significant impact on highway construction costs. As the construction market and economy have experienced dynamic changes in prices, the price volatility becomes less predictable. In addition, various levels of the price volatility in different market locations aggravate the prediction. Transportation agencies face significant uncertainties in price volatility across different geographical locations. This volatility may not be uniformly distributed across different geographical locations due to changes in the availability of local contractors, materials, equipment, and labor. The objective of this research is to develop statistical models that are capable to explain spatial variations in submitted unit prices for asphalt line items in highway projects considering local market condition factors. Historical bid data used in this research consist of resurfacing and widening projects let in the state of Georgia, the United States, between 2008 and 2015. The methodology of this research is a spatial regression analysis to explain the spatial variation in the submitted unit prices for asphalt line items. The findings of this research indicate that volatility in submitted bid prices is not uniformly distributed across different geographical locations within the same transportation agency. The contribution to the body of knowledge of this research is an improved understanding of the role of local construction market and macroeconomic conditions to explain geographic variability in construction costs.
DOI: 10.14455/isec.res.2017.54
title: Curriculum renewal in architecture, engineering, and construction education: Visualizing building information modeling via augmented reality

description: Building information modeling (BIM) has long been utilized in the Architecture, Engineering and Construction (AEC) education. Learning and teaching (L & T) research has revealed a range of shortcomings in using BIM such as unfamiliarity of students and graduates with real-world field operations and decision making processes. Better visualization of BIM via augmented reality (AR) is an innovative educational approach that can address the aforementioned problems. This paper, proposes AR-powered BIM as a robust platform to be adopted in the AEC education with the aim of improving student experience and learning. After discussing advantages and disadvantages of BIM and AR as two separate platforms, opportunities and challenges to combine the two are investigated. This work contributes to the body of knowledge in the field of AEC education by investigating the dynamics of using AR-powered BIM in curriculum design.
DOI: 10.14457/kku.res.2011.109
title: การพิสูจน์สมุนไพรสกุล Clausena จากความแตกต่างของสารประกอบทางเคมี โดยใช้วิธี HPLC fingerprint
DOI: 10.14457/kmutnb.res.2004.16
title: ศูนย์วิจัยและทดสอบการเติมอากาศ /
DOI: 10.14457/mu.the.2014.99
title: ความภาคภูมิใจในตนเอง ของนักศึกษาที่มีความบกพร่องทางการได้ยิน และนักศึกษาที่มีการได้ยิน