bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improvement of the raw drinking water quality from shallow well by ozone treatment
Authors: Helmy Qomarudin , Notodarmojo Suprihanto 
Published: November 2019

Abstract
The interests of ozonation has increased significantly in recent years and today the ozonation is used in other steps in the drinking water treatment process. Ozonation has been used in the refill drinking water depot in the region of Indonesia for several years as disinfection at the end of the drinking water treatment process. Except for the disinfection, ozone has other benefits such as oxidation of iron and manganese, micro flocculation, reduction of taste and odour and it is also effective to reduce the water colour. The micro flocculation leads to the fact that less or no coagulants need to be used in the process. This study started with a lab scale experiments on ozonation and filtration of raw drinking water taken from shallow well followed by examination in the pilot plant. Research result showed the removal efficiency for organics, iron, manganese, and turbidity is up to 75 %; 98 %; 85 %; and 98 % respectively. All the parameter is comply with the drinking water standard regulated by Indonesia Ministry of Health No. 492/Menkes/PER/IV/2010. Disinfection capability of ozone against microorganisms will be reported in the full paper.
Cyclic behaviour of expanded polystyrene (Eps) sandwich concrete walls
Authors: Wibowo Ari 
Published: November 2019

Abstract
Precast concrete walls become increasingly utilized due the rapid needs of inexpensive fabricated house especially as traditional construction cost continue to climb. Moreover, particularly at damaged area due to natural disaster when the requirement of a lot of fast-constructed and cost-efficient houses are paramount. However, the performance of precast walls under lateral load such as earthquake or strong wind is still not comprehensively understood due to various type of reinforcements and connections. Additionally, the massive and solid wall elements also increase the total weight of building and hence increase the earthquake base shear force significantly. Therefore, the precast polystyrene reinforced concrete walls which offers light weight and easy instalment became the focus of this investigation. The experimental test on two RC wall specimens using EPS (Expanded Polystyrene) panel and wire mesh reinforcement have been conducted. Quasi-static load in the form of displacement controlled cyclic tests were undertaken until reaching failure. At each discrete loading step, lateral load-deflection behavior, crack propagation and collapse mechanism were measured which then were compared with theoretical analysis. The findings showed that precast polystyrene reinforced concrete walls gave sufficient seismic performance reaching up to 1% drift at failure point against lateral.
Structural perfomance of cold-formed wall frame under combined gravity and lateral loading
Authors: Ngian Shek Poi , Thong Lim Teck , Tahir Mahmood Md , Saggaff Anis 
Published: November 2019

Abstract
Light steel framing is generally based on the use of standard C or Z shaped steel sections produced by cold rolling from strip steel, which is normally refers to cold formed steel sections. Light steel framing is already well established in residential construction in North America, Australia and Japan. Cold formed steel sections are widely used in many sectors of construction, including mezzanine floors, industrial buildings, commercial buildings and hotels and are gaining greater acceptance in the residential sector. In Malaysia, cold formed steel sections are frequently use in roofing systems such as roof trusses and purlins. The light steel framing system has yet to be practiced in Malaysia. There is a need to investigate the economic aspects of the light steel framing system in our local industry, conduct comprehensive testing and parametric studies to create the guidance and procedures of the analysis and design of such building. This paper presents a lightweight system for wall panels made of cold-formed steel sections. Three wall panel samples are tested experimentally under combined gravity and lateral loading to investigate the performance of the panel in terms of strength, stiffness and ductility. The results from the experiments show the wall panel using back-to-back and box arrangement able to increase the lateral stiffness and strength as compared to single section wall panel. The increment of strength can goes up to 39% under combined gravity and lateral loading while for lateral stiffness the increment can goes up to 83%. The performance of the panel can be applied to the light steel structure that can materialize the new residential building mode of low cost, high efficiency and large scale. The significance of this study is to reduce the use of labour by introducing pre­fabricated panel section, which is environmentally friendly and reduce congestion on site, and able to reduce overall construction cost by using precast construction with higher strength and stiffness capacity.
Issues of shear deformation measurement in experimental studies
Authors: Basyaruddin  , Cheng Min Yuan 
Published: November 2019

Abstract
Shear deformation determined using “X configuration method” as traditional instrumentation plan is controversial. Shear deformation of two specimens was re-investigated in this research. One of those (SP3) was representing a RC beam member using a single curvature test scenario and a coupling beam specimen (CB2) was representing a RC beam member using double curvature test scenario. The new instrumentation technology, optical system, provides a useful tool to evaluate different traditional instrumentation plans. Shear deformation is evaluated with different gauge lengths. The best-possible solutions of both specimens are determined using the optical system with the finest grid. Error is estimated by comparing results from “X Configuration” method with the best-possible solution. Analysis results indicate that the smaller gauge length yields the better results. A gauge length of 6.3 in. (160 mm) from X configuration method gives the smallest error, less than 10 %, in measuring shear deformation in a flexural governed member. It suggests that the gauge length to \measure shear deformation in a coupling beam specimen can be limited within 16.5 in. (420 mm). The largest gauge length from X configuration method in measuring shear deformation shows the largest error for both specimen SP3 and specimen CB2.
Evaluation of Handover Practice in Post-disaster Reconstruction in Aceh Province, Indonesia
Authors: Adamy Aulina , Bakar Abu Hassan Abu , Razak Arman Abdul 
Published: November 2019

Abstract
As the largest reconstruction project in the developing world at the time, Aceh’s post reconstruction experience may provide useful lessons on how aid is delivered particularly for public buildings and facilities as one of the largest amount of projects after housing. In Indonesian construction industry, among many stages of construction process, handover is still commonly underrated or even skipped. This is no different in the case of post-disaster reconstruction where challenges raised as there were pressures to build thousands of facilities in a limited amount of time and need to be occupied as soon as possible. This study objective is to evaluate the handover practice in post-disaster reconstruction of public buildings and facilities after being occupied. The survey focused only for buildings constructed by the Indonesia government agency (BRR) and managed to cover 24 buildings that are divided into government offices, schools and community health centres in Banda Aceh, the capital city of Aceh province from total 53 buildings available. Questionnaires were distributed to respondents which are government staff that responsible for the building operational with a response rate of 54%. The survey results show that the handover process is not completed and therefore the respondents doubt with the building quality. Though, respondents are neutral in accepting buildings without proper handover because they understand the urgency of operating public buildings and facilities immediately in emergency situation. Respondents still urged for post-occupancy evaluation by independent committee and fully agreed for proper handover practice in the future. As for final recommendation, conducting project evaluation by independent committee is essential even most of the buildings already being used and might replace the lack of handover administration stage for legal solution in government assets in the context of Aceh’s post-reconstruction.
Potential Use of Municipal Solid Waste Ash (MSWA) As Sustainable Construction Bricks
Authors: Saleh Ani Maslina , Rahmat Mohamad Nidzam 
Published: November 2019

Abstract
Uncontrolled infrastructure development may produce excessive carbon emission and scarcity of natural resources, that exploited for the mean of development. The reuse of waste materials will promote material ecology and the cradle to cradle concept. This study utilizes Municipal Solid Waste Ash (MSWA) as a potential target material in replacing laterite soil that is nonrenewable natural resources. Mix design, compositions were established for industrial trial of brick making. Laterite soil on its own (100%) and in combination with MSWA, (50:50) stabilized with PC and Lime at 20% and 30% were used to produce bricks. The bricks were then air dried. Two engineering properties, compressive strength and water absorption were studied. The investigation results show that compressive strength and water absorption of laterite soil combine with MSWA at (50:50) recorded higher strength compared to when laterite soil were used alone. This suggests viability and feasibility of using waste material in brick making.
The User Requirements for Building Maintenance Management Systems in Malaysian Public Universities
Authors: Zakiyudin Mohd Zulakhmar , Fathi Mohamad Syazli , Rambat Shuib , Tobi Siti Uzairiah , Rajab Nor A’ini 
Published: November 2019

Abstract
Representing almost 50% of the total turnover of construction activities, building maintenance investment is huge all over the world. In facilities management activities, building maintenance is also regarded as a common function. This paper emphasises the current user requirements for building maintenance management in Malaysian public universities. Starting with semi-structured interviews, information gathered focuses on different aspects of building maintenance practice to identify the main user requirement issues. The areas of study are to justify the objectives of maintenance departments and examine the processes of maintenance reporting and verification and other associated tasks. In this study the applications and contributions of Information Technology (IT) facilities in maintenance practices are reviewed. Finally, the development of user requirements by using the interface design concept is explored. It is envisioned that, in the future, good building maintenance practices will become the norm in Malaysia so that users will extract maximum benefits from their buildings and facilities.
Energy Efficiency Criteria for Common Building Structure Systems: An Overview
Authors: Balubaid S. , Zin R. M. , Hassan J. S. , Mardzuki Samihah 
Published: November 2019

Abstract
Making decisions about the selection of energy efficiency building construction is one of the sustainable construction key. Therefore it is crucial to identify criteria that can influence the choice of energy efficient common building structure systems. The main purpose of this paper explores the energy efficiency criteria for common building structure systems. Thus, the paper adopts a conceptual approach by using current literature on energy efficiency. The paper shows a wide range for the energy efficiency criteria for common building structure systems. This range in reported figures is due to the use of common different building structure systems through different LCA methodologies and different boundaries. For that reason, this paper contributes to the literature by providing deeper insights into the energy efficiency criteria influencing the selection of energy efficiency common building structure systems. The paper also present a new approach that will support energy efficiency termed ‘energy efficiency common building structure systems’. And this will opens several interesting avenues for future research.
Study on Energy Consumptions for The Commercial Buildings Using Energyplus
Authors: Abu Bakar Mohd Noor Ropiah Bin , Yahya Khairulzan Bin 
Published: November 2019

Abstract
This paper presents the results of simulation for commercial building using Energyplus program and ASHREA database. The study is concerned on the factors that can enhance the energy efficiency in the existed building where there are a limited possibility in comparison with the new buildings. The construction of the building has been drawn in Sketch up 8 and the calculation has been made in energyplus however the communication between them has been accomplished using legacy open studio. The ASHREA database used in this paper is related to Kuala Lumpur region where there is no database for Johor in such organization. Three factors has been studied now: increasing of daylight control sensors, increasing the cover shadow of windows, effect of presence of trees infront of the buildings. The results show that there are a significant effects to the total energy used in the building with improving the above factors and therefore the energy efficiency is increased.
Comparative Analysis of Material Fluctuation Response based on Data Set Groups
Authors: Melinda Melinda , Sianturi Patar , Tamsir Agus Santoso 
Published: November 2019

Abstract
Multi spectral capacitive sensor (MSCS) is a sensor that is formed based on the concept of white noise impedance spectroscopy. This concept utilizes the spectral noise frequency approach of the frequency domain signal resulting from the field effect on the dielectric. As a sensor, the consistency results obtained is stable, so that it can facilitate analysis. In this study, we tried to compare data groups, starting with 100 data sets and 300 data sets from a total of 600 data sets for H2O and H2O mixed with NaOH materials and H2O mixed with HCl using a new transformation, namely Tamsir statistical transformation (TST). Furthermore, grouping data uses the total amplitude value of each data set obtained. We obtain the results in the form of differences between groups of data with fluctuations in response patterns that are close together which are shown in 2D graphics. Hence, we can implement the data groups as a reference pattern of fluctuations in a material.
MIMO 4×4 hexagonal microstrip array antenna for 15 GHz application
Authors: Nur Levy Olivia , Aji Alvian Raharjo , Syihabuddin Budi 
Published: November 2019

Abstract
Recently 15 GHz has been a frequency candidate for fifth generation (5G) mobile communication technology. Minimum bandwidth has to provide for 5G application is 1 GHz. In this paper we proposed antenna design to fullfill those requirement. We use microstrip patch antenna which has narrow bandwidth. To improve the bandwidth, we use proximity couple and observe the hexagonal patch antenna frequency response. We design a 4×4 MIMO antenna with less than -15 dB return loss and -20 dB mutual coupling to each ports. From the realization we have maximum bandwidth 1.34 GHz with lower frequency 14.42 GHz and upper frequency 15.76 GHz.
The 4×4 hybrid L-slotted rectangular microstrip antenna for dual band wifi communication
Authors: Agusta Ramaska Prima , Wijanto Heroe , Syihabuddin Budi , Prasetyo Agus D. 
Published: November 2019

Abstract
Indonesia has regulated 2.441 GHz and 5.8 GHz bands for WiFi communication. Considering these two bands requirement, L-Slot can be added into a rectangular microstrip antenna. Then, we transform the single dual band antenna into MIMO to increase the system capacity and reffering the a WiFi specification. In this study, the designed 4×4 hybrid L-slotted rectangular microstrip antenna can produce: bandwidth ≥ 40 MHz for 2.441 GHz and ≥ 100 MHz for 5.8 GHz (using return loss ≤ 10 dB), and obtained mutual coupling ≤ -20 dB. The radiation pattern produced for both of 2.441 GHz and 5.8 GHz is unidirectional.
Numerical and experimental study on Solar Updraft Power Generator (SUPG)
Authors: Ridwan Abrar , Abdurrahman Ridwan , Fauzi M Ridha , Nusbir Yohanes , Anggraini Denny 
Published: November 2019

Abstract
The need for energy is fundamental to drive the economy and social from the community. Clean, renewable, and sustainable energy is the one desired by the community today. Solar Updraft Power Generator (SUPG) is one power generation system that utilizes heat from solar radiation to produce artificial wind that will drive the wind turbine. This study consists of numerical and experimental analysis. The numerical analysis uses ANSYS 17.2 and SOLIDWORKS 2016. SOLIDWORKS 2016 is the software used in designing SUPG geometry. ANSYS 17 is the software used to analyse SUPG velocity and temperature contour. Then the numerical analysis would be compared with the experimental analysis. The study took place on a SUPG the laboratory conversion energy of the Muhammadiyah University of Riau. From the numerical analysis we can conclude that the higher ΔT ground-ambient would resulting a higher air velocity. Compared numerical to experimental analysis showed a difference. For numerical analysis from ΔT ground-ambient 5°C resulting maximum velocity 1.6 m/s, while for experimental analysis from average ΔT ground-ambient 3.6°C resulting maximum velocity 4.1 m/s. This happened because there still much external force (such as wind) that increase the velocity that generated inside the Solar Updraft Power Generator beside the buoyance force.
Effects of varying chemical composition with x = 0.1 – 0.7 on magnetic properties of soft ferrite Ni1-xZnxFe2O4
Authors: Idayanti N , Dedi  , Kristiantoro T , Sudrajat N , Mulyadi D , Gustinova A 
Published: November 2019

AbstractThe preparation of NiZn ferrites with varying composition have been synthesized by mechanical milling method. The starting iron oxide (Fe2O3), nickel oxide (NiO), and zinc oxide (ZnO) were mixed with seven compositions of Ni1-xZnxFe2O4with x = 0.1 – 0.7. The effects of the composition on the structural and magnetic properties of the ferrite have been investigated. Structural properties were observed by X-ray diffraction (XRD) (Bruker’s). XRD patterns match well with the characteristic reflections of f d-3 cubic spinel structure, and it confirms that the all samples have single phase. Magnetic properties characterized by Permagraph Magnet Physik at room temperature. Hysteresis curve results show that varying composition influence the magnetic properties. Sample that have the highest Ms andMrvalues is when x = 0.3 with magnetization of remanence (Mr) = 30.1538 emu/g, magnetization of saturation (Ms) = 39.1642 emu/g, coercivity (HcJ) = 0.3040 kA/m, and density = 4.40 g/cm3. The highest HcJ value when x = 0.2, coercivity (HcJ) = 0.4050 k/m.
The effect of Lead (Pb) Hot dipping on seawater corrosion rate in ASTM A36 Steel
Authors: Eka Utami Nurhabibah Paramitha , Ellyanie  , Nasution Jimmy Deswidawansyah 
Published: November 2019

Abstract
Corrosion attacks are a scourge on offshore industrial structures. The hot dipping method is a common method used in protecting submerged material from corrosion attacks. The main objective of this study was to investigate the effect of variations in hot dipping time in Lead (Pb) on corrosion attack by performing corrosion rate test, weight loss measurement, microstructure analysis and fatigue test. The results revealed that the longer the hot dipping was carried out there was a decrease in the value of corrosion rate and weight loss of ASTM A36.
Passion-fruit shell biomass as adsorbent material to remove chromium III from contaminated aqueous mediums
Authors: Campos-Flores G , Gurreonero-Fernández J , Vejarano R 
Published: November 2019

Abstract
The aim of the study was to evaluate an adsorbent material based on passion-fruit shell biomass (PFSB) for chromium III removal from contaminated aqueous mediums, composed of distilled water and different concentrations of Cr(III), with a dose of 5 g of PFSB per liter. The residual concentration of Cr(III) in the treated mediums was determined by Atomic Absorption Spectrophotometry. A good adsorption process was carried out, achieving removal levels up to 85, 80, and 53% for solutions of 20, 50 and 200 ppm of Cr(III), respectively. The results showed an adequate fit to Langmuir and Freundlich models (R2 of 0.8864 and 0.7596, respectively), obtaining the following parameters qmax
: 27.933 mg g−1and b: 0.029 (for Langmuir model), and k: 1.400 and n: 1.650 (for Freundlich model), with a good adsorbent-adsorbate interaction for Cr(III) according to FT-IR spectra. Therefore, the obtained results suggest that Cr(III) can be removed by more than 50% by using passion-fruit shell, which with a minimum treatment could be used as an adsorbent in the treatment of chromium-contaminated aqueous mediums.
Sales prediction of Four Wheelers Unit (4W) with seasonal algorithm Trend Decomposition with Loess (STL) in PT. Astra International, Tbk
Authors: Telaga Abdi , Librianti Anggun Fadhlin , Umairoh Umairoh 
Published: November 2019

Abstract
Corporate Information System and Technology (CIS&T) division in PT Astra International Tbk is digitizing all business lines. Therefore, the company started to utilize machine learning to predict four wheelers (4W) sales in 2017. Data used were car sales data from 2014 to 2016. The data were obtained from company’s data warehouse (DW). Further, to develop application, firstly, Minitab was used to compare algorithm in modelling phase. Then, Azure Machine Learning Studio (Azure ML) was utilized to build prediction model based on algorithm chose in first phase. Finally, visualization was developed using Power Business Intelligence (Power BI). Time series algorithm used to solve the case is Seasonal Trend Decomposition with Loess (STL). While, machine learning model uses R library, and process flow module in Azure ML. The STL prediction model yield 9.38% error. Visualization of result is divided into two sections filtered by three parameters type, color and area. The first section in dashboard is sales data report showing percentage of type, color of cars and deployment of 4W units in Indonesia through ArcGIS Maps. The second section is forecast result containing chart of x axis to represent year and y axis to represent number of units. Further, the chart provide historical, current and forecast information. The research contributes to illustrate development of prediction using machine learning in industrial environment.