bluuebunny/crossref_metadata_2025_split huggingface dataset:
Computer-Assisted in Coiled Tubing Perforation Limitations: A Case Study from MA-X Gas Well
Authors: Han Kung Yee , Sidek Akhmal , Supee Aizuddin , Junin Radzuan , Jaafar Zaidi , Nasir Ahmad Nabil Md , Tarmidi Zakri , Omar Shaziera 
Published: December 2021

Abstract
This paper seeks to determine the optimum operating conditions for deploying casing perforation guns based on CT to target depths in gas well MA-X by utilising Orpheus Model in CERBERUS. Orpheus assisted to solve the complicated scenarios and complex analysis involves mathematical modelling which is necessitates for computer processing powers. This study investigated four different Coiled Tubing (CT) intervention operational variables namely borehole assembly, CT grade outer diameter (OD), well fluid type and fractional reducer application included examined two scenarios which are running tools in (RIH) and pulling out from borehole (POOH). Only CT workstring with outer diameter between 1-1/4 inch and 2-7/8 inch is considered due to the wellbore completion minimum restriction. Constrained by economic and logistical reasons, only fresh water, 2% KCl, 15% HCl, sea water and diesel will be considered for the well bore fluid. Fractional reducer effects was simulated and analysed. Based on simulation results, the CT outer diameter 1-3/4 inch workstring optimized operation, the CT grade is QT1000 increased mechanical properties. A suitable well fluid is sea water with application of friction reducer improve CT perforation performances to achieve maximum target depth.
Velocity Flow Field Characteristic on Nozzle Cavity using Central Composite Design of Computational Method for Dry Ice Blasting System
Authors: Hidayat Mat Mohamad Nur , Md Basir Md Faisal , Farid Sies Mohamad 
Published: December 2021

Abstract
In the development of dry ice blasting nozzle geometry, the critical process parameters depend on particle jet velocity. However, very few researchers have attempted sensitivity on the velocity flow area of specific nozzle geometric parameters. A numerical simulation approach was performed in this paper using Ansys Fluent to investigate different nozzle parameters on the velocity flow field. A two-dimensional model is solved iteratively using averaged Navier-Stokes under Eulerian flow description. It was found that the velocity value increases that reach 550 m/s with an increment of the nozzle area ratio of up to 20 without influencing convergent angle and the velocity magnitude drop linearly from 525 m/s to 505 m/s in with the rise of divergent length that swell up to 700 mm and with constant convergent angle and convergent length.
Optimization of Tool Path Length on Three-Dimensional Drilling Application Using Ant Colony Algorithm
Authors: Rusman Muhammad Danial Ikmal bin , Abdullah Haslina , Zakaria Mohamad Shukri , Talib Norfazillah , Kiow Lee Woon , Saleh Aslinda 
Published: December 2021

Abstract
The lower machining time is important characteristic in the drilling machining process. Drilling process costs will increase if the machining time is high. Therefore, the main objective of this research is to develop Ant Colony Algorithm (ACO) to reduce the machining time by obtain the optimal tool path length. By using this algorithm, it can minimize the tool path length and significantly decreasing the machining time of drilling process. Simulating in 3-dimensional drilling on ACO has been constructed to minimize the shortest path of the drilling process. There are two type of workpiece has been used, which is simple block with 10 holes and complex block design that has 154 holes. ACO algorithm has been developed in Matlab R2017b to determine the optimal parameters of ACO of tool path length in drilling. Besides, simulation also has been done to investigate the effect of ACO parameter which is weight of pheromone (α), weight of trail (β), evaporation coefficient (e), and number of iterations. As a result, by define the parameter of iteration number at 900, the optimum parameter of weight of pheromone (α) is 5, weight of trail (β) is 4 and evaporation coefficient (e) is 0.4. Based on these parameters, the minimal tool path length obtain for simple and complex model are 286.965 mm and 6770.9860 mm respectively. Then, the result of tool path length of ACO simulation has been compared with the Mastercam outcome. ACO achieves a total tool path length of 286.965 mm while Mastercam achieved 569.878 mm for simple block design. Meanwhile, for complex block design, ACO produces a total tool path length of 6770.9860 mm while Mastercam has generate 55828.9050 mm of tool path length. By comparing these two approaches, ACO and Mastercam, ACO has that the short total tool path length by 49.64% on simple block design and 87.87% for complex block design.
Advantages of Using Hybrid System Method in Industrialised Building System (IBS)
Authors: Azmin Izzati , Kassim Umar 
Published: December 2021

Abstract
Hybrid System method is one of the technology implements in Industrialised Building System (IBS). Methods has been acquaint in many ways in order to improve Industrialised Building System (IBS) in Malaysia. Other country such as United Kingdom also have used the term Hybrid for their concrete process known as Hybrid Concrete Construction (HCC). While in Malaysia, Hybrid System comes with a method that combines one component with two different method which are the precast component and cast-in situ method. This two combination method has called a Hybrid System method and started implements by Jabatan Kerja Raya (JKR) for mostly a government projects in Kedah state in Malaysia on 2017. Industrialised Building System has been well known as a fast completion, saving cost, and less labour needed in construction. However, the issues by using Hybrid System method has double up the time completion, splurging the cost, and enlarge the labour since it needs to cast-in situ the components, let the concrete cured and more material usage. The significance of study for this research is the new method of IBS Hybrid System is a pilot project in Kedah by JKR. Thus, this research is to control the delay involves in projects that apply IBS Hybrid System. Hence, this paper is to identify the advantages of using Hybrid System method in Industrialised Building System (IBS).
Performance and Kinetic Study on Oil Removal Via Electrocoagulation Treatment
Authors: Lam Jillin Soo Ai , Shoparwe Noor Fazliani , Khairudin Nurulbahiyah Ahmad , Tan Lian See , Lee Kee Quen 
Published: December 2021

Abstract
Electrocoagulation (EC) is a reliable technology for wastewater treatment. It has been applied in treating various source of wastewater from tannery, electroplating, dairy, textile processing, oil and oil-in-emulsion. It is crucial to strengthen the fundamental of the EC treatment on oily water sample for further studies. However, in depth studies on the performance of EC treatment on oily water sample is still requires in depth studies. In this research, a series of experiment has been conducted on the performance of EC treatment including effect of the amount of sodium chloride (NaCl), applied voltage and pH to determine the efficiency in oil removal. The EC treatment took placed in room temperature and constantly agitated for 30 minutes meanwhile samples were collected for every 5 minutes for UV–Vis analysis. Then, the efficiency of the treatment was determined followed by simulating the results in kinetic models. The highest efficiency of EC treatment was achieved with 89.26% of oil removal with the addition of 7.5g of NaCl, 4V of applied voltage and at pH 6. In addition, the results have better fitness towards pseudo second order (PSO) which indicates the mechanism of EC treatment is chemisorption.
Identification of Sharp Edge Non-Slender Delta Wing Aerodynamic Coefficient Using Neural Network
Authors: Rahman Fahmi Izzuddin Abdul , Mat Shabudin , Radzi Nor Haizan Mohamed , Nasir Mohd Nazri Mohd , Sallehudin Roselina 
Published: December 2021

Abstract
Delta wing formed a vortical flow on its surface which produced higher lift compared to conventional wing. The vortical flow is complex and non-linear which requires more studies to understand its flow physics. However, conventional flow analysis (wind tunnel test and computational flow dynamic) comes with several significant drawbacks. In recent times, application of neural network as alternative to conventional flow analysis has increased. This study is about utilization of Multi-Layer Perceptron (MLP) neural network to predict the coefficient of pressure (Cp
) on a delta wing model. The physical model that was used is a sharp edge non-slender delta wing. The training data was taken from wind tunnel tests. 70% of data is used as training, 15% is used as validation and another 15% is used as test set. The wind tunnel test was done at angle of attack from 0°-18° with increment of 3°. The flow velocity was set at 25m/s which correspond to 800,000 Reynolds number. The inputs are angle of attack and location of pressure tube (y/cr) while the output is Cp
. The MLP models were fitted with 3 different transfer functions (linear, sigmoid, and tanh) and trained with Lavenberg-Marquadt backpropagation algorithm. The results of the models were compared to determine the best performing model. Results show that large amount of data is required to produce accurate prediction model because the model suffer from condition called overfitting.
Mechanical and Physical Properties of Cross-Laminated Timber Made from Batai using Different Glue Spread Amounts
Authors: Liew Kang Chiang , Maining Ezzia Stecy 
Published: December 2021

Abstract
This study aimed to determine the mechanical and physical properties of the Cross-Laminated Timber (CLT) glued with different amounts of glue. Cost of glue is the outmost importance where it will help in reducing the CLT manufacturing cost. Four different amounts of glue spread were used where the glue that used was phenol-resorcinol formaldehyde (PRF);150, 200, 250 and 300g/m2. The testing of the CLT was conducted by following BS EN 408:2010, BS EN 16351:2015, ASTM D 2718 method B, ASTM D 143-94 and Japanese Agricultural Standard (JAS) 1152:2007. The analysis of physical tests that have been carried out are density, moisture content, shrinkage and swelling of the CLT’s thickness. Meanwhile, the mechanical tests were compression parallel and perpendicular to the grain, three-point bending test (flatwise and edgewise of CLT) and shear test. The highest density was shown by the CLT that using 300 g/m2 which the value was 316.41 kg/m3. Whereas the highest moisture content was shown by CLT that used 250 g/m2 with 15.49% in value. The highest thickness shrinkage percentage was 2.50%, CLT with 200g/m2 while the highest thickness swelling percentage was 5.60% which the CLT used 150 g/m2. For the flatwise bending test, it shows that the CLT that used 300 g/m2 has the highest MOE and MOR value which were 510.63N/mm2 and 8.39 N/mm2. The MOE and MOR value for edgewise bending also shows that CLT that used 300 g/m2 was the best with 1528.70 N/mm2and 13.48 N/mm2. In compression perpendicular to grain test, the CLT with 150 g/m2 shows the highest value of MOE which was 5.89 N/mm2 while CLT that used 200 g/m2 has the highest value of compressive strength with 9.10N/mm2. However, for compression parallel to grain test, the CLT that used 300 g/m2 shows the best performance with 1002.78 N/mm2 and 13.75 N/mm2 of MOE and compressive strength value. Lastly, for the shear test, the highest shear strength value was 0.39 N/mm2 which belongs to CLT that used 150 g/m2. Thus, CLT that used 300 g/m2 of glue spread amount is the best CLT which, the more the amount of glue, the better the performance of the CLT.
CFD Simulation on Improving Water Quality based on Various Aerator Models to Demonstrate Cost Performance Analysis
Authors: Norbashah N N , Rani M F H , Kamarrudin N S , Shahriman A B , Razlan Z M , Wan W K , Hashim M S M , Ibrahim I. , Rahman A , Ibrahim Z. , Faizi M K , Hassan M A S M , Abd Manap A A , Zainuddin I F 
Published: December 2021

Abstract
There are many types of aerator that can be used to perform a water treatment process either from air to water or from water to air approaches. Other than focusing on the performance itself, the usage cost of aerator should be forecasted in detail too to have a sustainable and economical method in remediating the polluted water. Therein, the cost performance analysis was demonstrated by performing a computational fluid dynamics (CFD) simulation on improving water quality based on various aerator models. The simulation was focused in a small-scale aeration tank that consists of a mixing chamber, air duct, and a few of bubble diffusers. The improvement of water quality was assessed by calculating the number of gas bubble particles produced by 4 different configurations of aerator model, namely aerator model A, B, C and D, respectively. Results found that the aerator model D (5 bubble diffuser at 620 L/min) produces the highest number of gas particles up to 72.2%. However, the aerator model C (5 bubble diffuser at 300 L/min) was found to achieve the most efficient and sustainable approach based on energy consuming and cost of aerator configuration when compared to the other aerator models.
Study the Structure Characterization of Porcelain Formulation at Different Sludge Content
Authors: Alias Suffi Irni , Johar Banjuraizah , Adam Syed Nuzul Fadzli , Taib Mustaffa Ali Azhar , Othman Fatin Fatini , Fhan Khor Shing 
Published: December 2021

Abstract
Porcelain formulation in the form of pellets have been studied by substituted fluxing materials with treated FGD sludge at different percentages. In this work, treated FGD sludge was added in percentages from 5% up to 15% uniaxially pressed at 11 MPa, dried and then sintered at temperature 1200 °C for 3 hours. Weight loss, volume shrinkage/expand, bulk density, densification, porosity and flexural strength were investigated on sintered samples. This demonstrated that the treated FGD sludge addition in porcelain formulation has influenced on the sintered samples. It was concluded that the treated FGD sludge waste could be used as a suitable raw material source for production of porous porcelain ceramic due to their organic and inorganic content.
Engine Performance Analysis by Studying Heat Transfer in the Valve Seat through Steady-State Thermal Simulation
Authors: Hassan M A S M , Shahriman A B , Razlan Z M , Kamarrudin N S , Khairunizam W K N , Hashim M S M , Harun A , Ibrahim I , Azizul Aziz I , Ibrahim Z , Faizi M K , Rani M F H , Rahman A , Rani M F H , Rojan M A , Murali R 
Published: December 2021

Abstract
As the engine reached high speed, the exhaust valve temperature increased exponentially due to the exhaust gas produced by the combustion process between the mixture of air and fuel within the combustion chamber of the internal combustion engine. The valve is subjected to thermal loading due to high temperature and pressure within the cylinder, which must withstand a material temperature for sustainable and optimal operation. To avoid this loss, a perfect medium must be prepared to ensure that the heat is extracted smoothly. This can be done when the valve is in contact with the seat and there is a periodic heat transfer contact. Therefore, it is imperative to research the correlation between valve and valve seat to understand the two sections’ heat transfer mechanism. In this study, thermal contact analysis was used to identify heat transfer between the valve and the valve seat as both parts are interconnected. This research also has an interest in studying the two surface conduction mechanisms as the exhaust valve closed in steady-state conditions. Thus, this study portrays a significant method, particularly for the determining the distribution of temperature, heat flux, and heat flux direction between the valve and its seat using ANSYS Workbench.
Mathematical modeling of monochromatic acoustic wave diffraction on a system of bodies and on flat screens
Authors: Daeva S G , Beskin A L , Trokhachenkova N N 
Published: December 2021

Abstract
Some problems of diffraction of a monochromatic acoustic wave on surfaces of complex shapes are considered. To solve such problems, an approach is applied, in which the problem is reduced to a boundary hypersingular integral equation, where the integral is understood in the sense of a finite value according to Hadamard. Such approach allows solving diffraction problems both on solid objects and on thin screens. To solve the integral equation, the method of piecewise constant approximations and collocations, developed in the previous works of the author, is used. In the present study, examples of modeling the diffraction of an acoustic wave by bodies with partial filling are given. It is shown how the filling of bodies influences the acoustic pressure field, and the field direction patterns are given. An example of applying this approach to solving the problem of sound propagation in an urban area is also given: the diffraction of an acoustic wave from a point source on a system of buildings is considered. The presented results demonstrate that this method allows constructing reflected fields and analyze their characteristics on surfaces of complex shapes.
Application of the algorithm for calculating the boundaries of built-up areas from satellite images to calculating the areas of flooded land and the environmental potential of the territories of settlements
Authors: Ilyushina T V , Sizov A P , Belenko V V 
Published: December 2021

Abstract
The processes of flooding of the territory of settlements cause significant economic damage to the national economy. Up-to-date space information provides research on flooding over large areas. Analysis of the dynamics of flooding in the Khabarovsk Region for 2016-2019 using remote sensing methods and statistical data analysis showed that the optimal software product for processing multi-time satellite images is the MapInfo Professional GIS application. It is established that the dynamics of the areas of flooded land in settlements has similar trends, significantly differing in quantitative indicators. The most favorable year was 2017, when the least amount of land was affected by flooding. In 2019, the amount of flooded land was the maximum. 2016 and 2018 occupy an intermediate position. The proportion of flooded land was the highest in large and medium-sized cities, the lowest in rural settlements, and the small towns occupied an intermediate position due to the landscape and geographical features of the research objects. The relative decline in the value of the territory environmental potential (EFP) was also the highest in large and medium-sized cities, and the lowest in rural areas. According to the years, the increase in the temporary decline in EFP due to flooding and withdrawal from economic use of land is as follows: 2017-2016-2018-2019, which is due to the dynamics of the hydrological and climatic characteristics of these years.
Using waterfall, iterative and spiral models in ERP-system implementation projects under uncertainty
Authors: Yu Stepanov D 
Published: December 2021

Abstract
The article considers the use of cascade and multi-pass implementation models of corporate information systems in case of business and technological uncertainty. A review of waterfall, iterative and spiral ERP-systems implementation models is given. The business and technological uncertainties inherent in software systems implementation projects are introduced. The basic principles of development complex applications in ERP-systems are analyzed, including the rules of evolution and functionality. One compares business uncertainty for refined requirements in the waterfall and Agile-based implementation models, which operate with a change request and allocation requirements to a new round of development respectively. There is no or minimal technological uncertainty in ERP-systems implementation projects, however high business uncertainty exists, which can not be decreased by any basic implementation approaches. The application area of the waterfall and multi-pass implementation models is clarified for ERP projects from scratch, rollout and evolution under business uncertainty.
Wavelet transform-based cross-correlation in the time-delay estimation applications
Authors: Sharkova S B , Faerman V A 
Published: December 2021

Abstract
The article discusses the application of wavelet analysis for the time-frequency time-delay estimation. The proposed algorithm is wavelet transform-based cross-correlation time delay estimation that applies discrete time wavelet transform to filter the input signal prior to computation of cross-correlation function. The distinguishing feature of the algorithm that it uses the variation of continuous wavelet transform to process the discrete signals instead of dyadic wavelet transform that is normally applied to the case. Another feature that the implication of convolution theorem is used to compute coefficients of the wavelet transform. This makes possible to omit redundant discrete Fourier transforms and significantly reduce the computational complexity. The principal applicability of the proposed method is shown in the course of a computational experiments with artificial and real-world signal. So the method demonstrated expected selectivity for the signals localized in the different frequency bands. The application of the method to practical case of pipeline leak detection was also successful. However, the study concluded that this method provides no specific advantages in comparison with the conventional one. In the future, alternative applications in biological signal processing will be considered.
The electric field dependence of single electron emission in the PIXeY two-phase xenon detector
Authors: Bodnia E. , Bernard E.P. , Biekert A. , Boulton E.M. , Cahn S.B. , Destefano N. , Edwards B.N.V. , Gai M. , Horn M. , Larsen N.A. , Riffard Q. , Tennyson B. , Velan V. , Wahl C. , McKinsey D.N. 
Published: December 2021

Abstract
Dual phase xenon detectors are widely used in experimental
searches for galactic dark matter particles. The origin of single
electron backgrounds following prompt scintillation and proportional
scintillation signals in these detectors is not fully understood,
although there has been progress in recent years. In this paper, we
describe single electron backgrounds in 83mKr
calibration events and their correlation with drift and extraction
fields, using the Particle Identification in Xenon at Yale (PIXeY)
dual-phase xenon time projection chamber. The single electron
background induced by the Fowler-Nordheim (FN) effect is measured,
and its electric field dependence is quantified. The photoionization
of grids and impurities by prompt scintillation and proportional
scintillation also contributes to the single electron background.