Journal: Engineering Heritage Journal (GWK)

ABSTRACT

LIGHTWEIGHT SLAG, PFA COLUMN A NEW SOFT GROUND IMPROVEMENT METHOD

Journal: Engineering Heritage Journal (GWK)
Author: Hafez, M. A., Sidek, H.N, Moustafa Z. Ibrahim, Almkahal, Z

This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gwk.01.2020.04.07

This study investigates how to reduce the demand on in non-renewable granite source, by replacing granite aggregate with boiler slag in the stone column. It is a fact that boiler slag is a power station waste material which causes too many environmental problems. By introducing it as a ground improvement technique, we can reduce the bulging and shear failure problems encountered on stone columns application by adding more improvement to the stone column mixture. For more enhancements to the mixture, pulverized fly ash (PFA) of Class F is added. By increasing the amount of PFA, the resistance of the stone column in term of shear and bearing capacity are increased as the PFA pozzolanic reaction begins to produce more strength during the increasing time of the curing period. Both samples of the boiler slag and PFA are taken from Sultan Salahuddin Abdul Aziz Power Station, Klang, Selangor. The materials mixed are sand, cement and water to make boiler slag aggregates -PFA (slag) mixture. This study aims to define the slag concrete performance according to the optimum configuration of the materials used in the mixture. Unconfined Compression Test (UCT) is applied to define the ideal ratio of boiler slag between 60% to 30% ratios from the total weight which applied with 2% ratio of cement from the total weight. The results of the study show that the number of boiler slags, the period of curing, and the method of curing are the most important factors in defining the slag stone column performance. Testing the samples in ordinary circumstances to entire areas can be accomplished by determining the soil properties and meeting them. The best result gained was the 40% ratio of boiler slag in a curing method that preserved the mixture moisture and temperature, which led to the optimum strength of the slag stone column.

ABSTRACT

POLYNOMIAL SERIES SOLUTION OF BENJAMIN−BONA−MAHONY EQUATION VIA DIFFERENTIAL TRANSFORM METHOD

Journal: Engineering Heritage Journal (GWK)
Author: Muhammad Jamil, Badshah-E-Room

This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gwk.01.2020.01.03

In this work, we solved the initial value problem of Benjamin−Bona−Mahony equation with generalized initial conditions by using differential transform method (DTM). We obtained the general solution in the form of a series. An example is presented for the particular initial conditions.

ABSTRACT

RESEARCH AND APPLICATION OF SEMI-ACTIVE SUSPENSION CONTROL AND PERFORMANCE TESTING SYSTEM

Journal: Engineering Heritage Journal (GWK)
Author: Ren Chenglong
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gwk.02.2019.15.17

Suspension is one of the important components of automobile products, and the smooth operation of the automobiles is closely related to the structure of the suspension. This paper studies the semi-active suspension control and its performance test by firstly introducing the suspension, then analyzing the neural network control basis and designing the single-chip control system, and finally formulating the performance evaluation criteria of suspension to evaluate its function. The performance of the semi-active suspension built on the basis of neural network control theory is better than that of the passive suspension and active suspension, so it can be promoted in the future application.

ABSTRACT

NONLINEAR CONTROL STRATEGIES AND PLANNING FOR UNDERACTUATED OVERHEAD CRANES

Journal: Engineering Heritage Journal (GWK)
Author: Liezal Slabber
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gwk.02.2019.12.14

Underactuated overhead cranes play an important role in engineering and construction, which also make nonlinear control strategies and planning on this basis become the current focus of academic research. Based on scholarly research findings, this paper carries out a theoretical study on nonlinear control strategies and planning for underactuated overhead cranes. To begin with, the underactuated system, underactuated overhead cranes and its nonlinear control are elucidated. Afterwards, the stabilization methods for front actuators are analyzed, and finally two nonlinear control methods are explored in the hope of providing some references for research in related fields.

ABSTRACT

MySTREAM: EMPOWERING 21^ST CENTURY SKILLS THROUGH TRANSDISCIPLINARY AND SUSTAINABILITY TECHNIQUES

Journal: Engineering Heritage Journal (GWK)
Author: Marlia M. Hanafiah, Khairiatul M. Jansar
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gwk.02.2019.09.11

Sustainability Education (SE), Education for Sustainable Development (ESD) and Education for Sustainability (ES) are the terms commonly used to describe the practice of teaching for sustainability. SE requires participatory teaching and learning methods that motivate and empower students to change their behaviour and play role in embracing concept of sustainable development. SE promotes competencies like critical thinking, imagining future scenarios and making decisions in a collaborative way. These competencies can also be applied for sustainable research since education and research are interrelated. To develop SE, it may be relevant to address the sustainable development in the curriculum or syllabus. The three pillars of sustainable development; environmental, economic and social might be used and adapted in academic and research disciplines. There is no specific pedagogy for SE, but there are several elements that can be adapted in the teaching environment such as critical reflection, systemic thinking and analysis, participatory learning, thinking creatively for future scenarios and collaborative learning. For instance, transdisciplinary research in assessing environmental performance of pollutants can be practised by extending the research including the impact pathway of the pollutants on economic growth, society well-being (human health) and awareness level of community. Transdisciplinary research not only look at one specific discipline, rather than look at the issue from a holistic perspective by establishing the linkage between environmental aspect with social and economic aspects. Transdisciplinary research also requires triple helix effort by strengthening government-academia-community relationship. This will help to inculcate different stakeholders with a sense of duty towards safeguarding human health and environmental stewardship. Thus, the SE can be established through transdisciplinary research which integrate and move beyond discipline-specific approaches to address a common problem.

ABSTRACT

FIGS (FICUS CARICA L.): CULTIVATION METHOD AND PRODUCTION BASED IN MALAYSIA

Journal: Engineering Heritage Journal (GWK)
Author: Kamaruddin Shamin-Shazwan, Rozilawati Shahari, Che Nurul Aini Che Amri and Nur Shuhada Mohd Tajuddin
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gwk.02.2019.06.08

Ficus (Moraceae) is a tree or shrub natively originated from East Asia countries such as Middle East and Turkey. However, determination of the most suitable cultivation method in Malaysia has becoming one of the major concerns in figs industry. This is because figs can be easily found in cold and temperate regions compared to the equator regions. Therefore, this paper will discuss on the method of figs cultivation and its production based on the market demands in Malaysia. Simple propagation methods such as cutting, and layering are the most recommended method used for cultivating the fig trees. As for the production, figs are mainly processed as food such as jam, tea, dipping sauce, spaghetti sauce and dried processed food or available fresh. It is also used in traditional medicine as it is claimed to be good remedies in treating severe health problem such reducing blood sugar level and gastrointestinal problem.

ABSTRACT

MODELLING OF DEPOSITION AND EROSION PROCESSES ALONG A 180° OPEN CANAL BEND BY NAYS2DH IN iRIC

Journal: Engineering Heritage Journal (GWK)
Author: Amany A. Habib and Mohamed A. Nassar
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gwk.02.2019.01.05

This paper presents experiments and computer simulation for the erosion and deposition processes along a 180° open canal bend. The computer simulation is conducted by Nays2DH model in iRIC software. The models are conducted with the curvature’s radius ratio (Ø/L) varies within 3.0 to 8.5. Experiments produced that the erosion and deposition actions decrease as Ø/L increases. The minimal erosion and deposition are detected at (Ø/L =8.5). The optimum place of a bridge circular support along the bend is defined. The results of Nays2DH Model are compared with tests. RSQ for the modelled statuses is 88.329% and the correlation factor between simulations and the gauged depths is 93.98%. 20

ABSTRACT

RE-ENGINEERING IN CONFINEMENT METHOD

Journal: Engineering Heritage Journal (GWK)
Author: Shahreen Kasim, Rohayanti Hassan, Zalmiyah Zakaria
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gwk.01.2019.18.19

Food delivery system is very popular nowadays. This system is very useful specifically for women that go through their confinement alone. Food for women in confinement is very important to their health. Not only for the women, but also for their babies. Women could choose the package they like thus reducing the hassle to prepare the confinement menu. In this paper, we present the information technology in health especially in confinement. With this system, the woman could focus on her baby and health without the stress to prepare food.

ABSTRACT

PARAMETRIC ARCHITECTURAL DESIGN BASED ON OPTIMIZATION ALGORITHM

Journal: Engineering Heritage Journal (GWK)
Author: Zhao Liang, Wang Wenshun
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gwk.01.2019.13.17

As a widely applied method in many fields, parametric design is now finally exerting influences on architectural industry with the rapid development of Internet technology. For this reason, parametric architectural design is studied in this research based on optimization method. First, parametric design and optimization algorithm are introduced; then, the process of modeling and optimization procedures is discussed; at last, the parametric optimization design is applied to solve the complex architectural design problems. Parametric method will thoroughly affect architectural industry. Therefore, architectural designs should be based on optimization algorithm using parametric design to improve the progress and quality of architectural design.

ABSTRACT

NONLINEAR CONTROL STRATEGIES AND PLANNING FOR UNDERACTUATED OVERHEAD CRANES

Journal: Engineering Heritage Journal (GWK)
Author: Wang Tianlei
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

DOI: 10.26480/gwk.01.2019.09.12

Underactuated overhead cranes play an important role in engineering and construction, which also make nonlinear control strategies and planning on this basis become the current focus of academic research. Based on scholarly research findings, this paper carries out a theoretical study on nonlinear control strategies and planning for underactuated overhead cranes. To begin with, the underactuated system, underactuated overhead cranes and its nonlinear control are elucidated. Afterwards, the stabilization methods for front actuators are analyzed, and finally two nonlinear control methods are explored in the hope of providing some references for research in related fields.