bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Study on Global and Cluster-wise Regression Model in the Automatic GMA welding
Authors: Yun Tae-Jong , Shim Ji-Yeon , Kim Hong-Gun , Liang Zong-Liang , Won-Bin Oh , Lee Bo-Ram , Park Min-Ho , Kim Ill-Soo 
Published: October 2019

Abstract
The automatic welding system is presently made use of high volume production industries even if the cost of the related equipment is justified by the large number of pieces to be made. Also, the detailed movement devices with the predetermined sequences of welding parameter and the use of timers to form the weld joints were required. A new mathematical model that predict the optimal welding parameters on a given bead geometry and accomplish the desired mechanical properties of the weldment to make the automatic GMA (Gas Metal Arc) welding process should be needed. The developed model should be employed a wide range of material thicknesses and be applicable for all welding positions as well. In addition, the algorithm must be available in the form of mathematical equations which can be programmed easily to the robot and give a high degree of confidence in predicting the bead dimensions. In this study, two regression models with global regression and cluster-wise regression are proposed to be applicable for prediction of optimal welding parameters on the bead reinforcement area. For development of the proposed regression models, an attempt has been done for applying to a several methods. A series experiments to research the effects of welding parameters on bead reinforcement area as a function of key output parameters for the lab-joint weld in the automatic GMA welding process was performed. Not only the fitting of these models was checked and compared by using a variance test (ANOVA), but also the prediction of bead reinforcement area using the developed regression models were carried out the basis of the additional experiments.
Digital Fabrication of a 3D Object using Fixtureless Assembly
Authors: Chancharoen Ratchatin , Sithiwichankit Chaiwuth 
Published: October 2019

Abstract
Digital fabrication is the kind of the manufacturing process expected to be the next industrial revolution due to its capability converting a digital model into a physical object with fully-automated operation of manufacturing. Although the assembly operation of mass-produced components gives relatively higher cost effective, it is still unprepared for the digital fabrication in practise, unlike the subtractive or additive operation. This research proposes the minimal-required robotic system and process enabling the digital fabrication using the assembly operation done at fixtureless location. The robotic system comprises a SCARA robot, a vacuum gripper, a ram extruder, a USB camera, and MATLAB® on a personal computer. The calibrations giving the required kinematic correlations, and the pose estimation capacitating the fixtureless location operation, are also described in this paper. The necessary process are product designing, product cell-decomposition, and product assembly. In result, the fully-automated assembly of a 3D object is successfully done at fixtureless location in about three minutes and haft which is short compared with using the subtractive or additive operation. This research gives promise of applying the digital fabrication using the assembly operation at fixtureless location for practical applications, such as building and repairing of furniture, constructive structure, and etc.
A survey of criteria for a selection of logistics service providers: a case of Thailand’s automotive industry
Authors: Norkaew Khanitta , Sureeyatanapas Panitas 
Published: October 2019

Abstract
This study aims to investigate the criteria that the automotive manufacturing companies currently consider when selecting a logistics service provider; and to prioritise the importance level of those criteria based on service buyers’ perspectives. The criteria were synthesised from the relevant literature review, and they were then used to develop the questionnaire. In this current study, the questionnaire was divided into two parts: the manufacturers’ current criteria for considering the service provider: and, the levels of importance for the criteria. It was then sent to five large-scale manufacturers in the automotive industry in Thailand. Following up with questionnaire responses, the researchers also conducted an interview with each participating manufacturer to elicit additional insightful information. According to the results, there were seven criteria that all five manufacturers collectively used to consider the logistics service: 1) Price, 2) Relationship, 3) Management system, 4) Flexibility, 5) Delivery, 6) Physical facilities, equipment and technology, and 7) Service areas. In this regard, the most important criteria were Price and Delivery, respectively. For logistics service providers, the findings of the study might be of use to design strategic planning, to improve their organization for a future service providing, and to maximize the competitive advantage. Additionally, the government could also implement these study findings to formulate the policy to support the logistics industry in Thailand to be able to grow sustainably and compete in the global market.
A Mathematical Programming Approach for Product Selection with Multiple Criteria
Authors: Janjarassuk U , Puengrusme S 
Published: October 2019

Abstract
Product selection is very important for customer who looks for functionalities of the product. To get the best product with the available budget, multiple criteria should be considered simultaneously while making decision. In this paper, we propose a multi-objective decision model for selecting the most suitable product for the customers. The model is tested by using a real case of power unit selection in studio recording, and the results are presented.
Development of Automated Vertically Stacked Hard Disk Drive Sorting Configurations Through Simulation Modeling
Authors: Akbudalee B , Pichitlamken J , Suebsankul S 
Published: October 2019

Abstract
This paper focuses on discrete-event simulation (DES) model of a vertically stacked HDD sorting system using the Arena software. We propose an approach decreasing the throughput time of sorting department that are inefficient. We find that the automated system can decrease the average waiting time, the work-in-process and the average total time in system by 59.24%, 59.87%, and 72.67%, respectively, compared with the current system.
Sustainable activity of engineering education and research of association for advanced education in Asia
Authors: Wakabayashi Toshio , Komine Noriyuki , Tsuji Hidekazu , Tomiyama Shigenori , Ariga Tadashi , Moriya Yoshiaki , Iijima Toshio 
Published: October 2019

Abstract
In this paper we describe activities of members in the association for advanced education in Asia (AAEA). It is a specified non-profit organization in Japan. The members are in activity at National University of Laos, Laos, King Mongkut’s Institute of Technology Ladkrabang, Thailand and universities in Vietnam, Malaysia and others. They have collaborated with their counterparts such us professors and students on specialized education and research. A lot of activities are useful and effective for our sustainable fields.
Gripper Design for Automatic Trimming System in Forging Process
Authors: Jantanalach S , Vongbunyong S 
Published: October 2019

Abstract
Labor shortage is one of the most common yet critical problems in industrial sectors. Using robotics and automation to replace human labor is one of the most effective solutions. In this research, robotic technology is implemented in the trimming process which is one of the key steps in faucet manufacturing. The system is designed to be able to deal with uncertainties of the shape of flash that are occurred due to the impression-die forging process. A gripper with specific jaws is designed to suit the workpiece. A vision system is used to identify the position and orientation of the workpieces. As a result, with the gripper and the vision system, the workpieces can be grasped, transferred, and loaded into the trimming machine at high success rate in comparison to human labor. In this paper, the design procedure of the gripper and performance of the gripper are emphasized.
Assembly of Modular Robot for Cleaning Various Length of Solar Panels
Authors: Chailoet K , Pengwang E 
Published: October 2019

Abstract
This paper discusses about the design and feasibility study for building a modular robot for cleaning solar panels. The objective was to design a universal module for transmission and manipulation that can be used with different length of solar panels and different arrangements in solar panel. Since there are various configurations for arranging the solar panel, this robot can be modified using an advantage of modular robots. The principle of working is to clean a solar panel with water, spiral brush, and rubber sweeper. The modular concepts were validated for the solar panel with a range of 1 to 4 meters in both testing and field environments. The solar panels cleaning robot can clean dirt and dust on the panel and increase the power generation of the solar panels. The target applications for this design can be extended for a solar farm, solar rooftop, and floating solar panels.
Properties of Self-Compacting Concrete with Different Sources of Coarse Aggregates
Authors: Saphouvong Khamhou , Thepvongsa Khampaseuth , Simixay Singvixay 
Published: October 2019

Abstract
Aggregate size and its source are crucial for concrete properties. This paper presents the evaluation of the properties of self-compacting concrete (SCC) which mixed with coarse aggregate from different sources. Coarse aggregate from three sources which are commonly available in Vientiane Capital, Mekong River (MK), Ngum River (NG) and Crushed Mountain Stone (MT) were used for this study. Six different mixed proportions with two maximum aggregate size 19mm and 12.5mm for each aggregate source were prepared. Ordinary Portland Cement Type I and Fly ash class C were used as binders. The replacement ratio of fly ash to cement was fixed at 20% and w/p ratio was 0.36. Sika Viscocrete-3180MR was used as water reducing admixture with 0.95% by weight of binders. The results show that, for the fresh concrete properties, the coarse aggregate with maximum size of 12.5mm from Mekong River is the most suitable aggregate comparing to other sources. For the hardened concrete with 28-day curing, the highest compressive strength is the mixed proportion MK12 for aggregate size 12.5mm. As seen, the coarse aggregate with 12.5mm of Mekong River is the most appropriate aggregate among three sources which has a flow-ability and higher compressive strength.
Fast large-scale current oscillations in SOFCs with intermediate fuel utilisation
Authors: Sands J D 
Published: October 2019

Abstract
In the push towards renewable energy technology fuel cells are set to replace many conventional means of power generation. Their efficiency and cleanliness compared to internal combustion engines is undisputed, however widespread adoption has yet to occur on a global scale. Two of the key issues affecting their mass adoption are their cost and their long-term stability. Whilst long-term testing has proven fuel cells a worthy competitor in the energy market, there are still reports in the literature of degradation caused by a number of different phenomena. In particular, most long-term testing focusses on intermediate fuel utilisation whereas many applications require high fuel utilisations. It is known that at high fuel utilisations several degradation mechanisms may come into play, sometimes resulting in agglomeration, cracking, decreased power output, and electrical oscillations. In this paper, current oscillations are reported in a solid oxide fuel cell under intermediate fuel utilisation which places it firmly in the applicable region for standard operation. Thus it is incumbent on fuel cell researchers to understand and control this unwanted behaviour in order to ensure long-term stability of a fuel cell stack. A prototype model is used here to explore potential causes using first principles.
Characterization and fabrication of bio-composite filaments for fused deposition modeling 3D printing
Authors: Phengchan P , Chaijaruwanich A , Nakkiew W , Pitjamit S 
Published: October 2019

Abstract
The metal bone screws are generally used in bone fractures. The bio-composite bone screws will be fabricated soon by using hydroxyapatite (HA) to reinforce polylactic acid (PLA) and polycaprolactone (PCL) filament for 3D printing. In this study aimed to characterize morphological and physical properties of bio-composite filaments. HA was synthesized from bovine bone. X-ray diffraction analysis indicated that the obtained HA and HA standard showed a similar chemical composition. The morphological observation of bio-composite filaments by scanning electron microscope (SEM) revealed the distribution of HA in bio-composite filaments. The elemental composition of the filament by energy dispersive spectrometer indicated the consisting of calcium, carbon and oxygen elements. The diameter measurement of all bio-composite filaments indicated the values ranged from 1.66 to 1.86 mm which were non-significantly different value in each composite filament and similar with a filament standard.
Development and Control of Rotary Inverse Pendulum by LQR with Integral Action
Authors: Chantarachit Surachat 
Published: October 2019

Abstract
This research a basic well-known hardware, is introduced. The inverse pendulum is the focused in this research. In order to prove the control algorithm LQR with integral action. The dynamic model is obtained by Euler-Lagrange equation. Motor actuator is included in the model in order to get the correct model. The model is linearize by Taylor series expansion. The model parameters are identified by software simulation. The inversed pendulum prototype is manufactured and assembled. The Linear Quadratic Regulator with Integral (LQR+I) controller is presented and applied to control the inverse pendulum. The control simulation and experiment results are present in the performance of this controller
Strain-based Evaluation of Bridge Monitoring using Numerical Model Analysis
Authors: Sinsamutpadung N , Sasaki E 
Published: October 2019

Abstract
According to visual inspection on the bridge site, the target bridge has major cracks in RC deck in the center span. This certain type of damage could affect structural performance and should be monitored. The structural health monitoring system was set up on the target bridge and the strain-based evaluation could be used to quantitatively determine bridge condition. The FE model of the bridge was modeled with various types of RC cracking pattern to represent the severity of bridge damage. The relationship between damage level and strain measurement is generated, As a result, Bridge monitoring curve based on strain index has been established.
Measurement model of good governance in government procurement
Authors: Chaitongrat T , Leungbootnak N , Kusonkhum W , Deewong W , Liwthaisong S , Srinavin K 
Published: October 2019

Abstract
This research aimed to develop competency factors for Good Governance in Government Procurement. The research adopted structural relationship models and is descriptive in nature. The research sample was drawn from 353 government sectors. The research tool was an expert questionnaire which had content validity and reliability of 0.986. The data was statistically analyzed by 1) exploratory factor analysis and 2) second-order confirmatory factor analysis. The research found that the model for the Good Governance in Government Procurement had high construct validity by both exploratory and confirmatory factor analysis. The model composed of 1 factor and 14 sub-factors from 15 selected variables.
Relationships of construction project manager, engineer, and foreman skills
Authors: Kawesittisankhun Kittipos , Pongpeng Jakrapong 
Published: October 2019

Abstract
Understanding the relationships of construction project manager, engineer and foreman skills can be used by contractors to develop project performance. Although there are widely discussed on construction individual skills, the relationships between individual skills having on others’ skills have not been examined in previous studies. Thus, this study examined such relationships. The questionnaire was used to collect data on the important range of skills of the individual to evaluate the relationships among them. The data were then analyzed using structural equation modelling (SEM) to determine the relationships of construction manager, engineer and foreman skills. The final SEM model shows regression weights in parenthesis that construction manager skills have influence on engineer skills (0.65) and engineer skills have influence on foreman skills (0.84). Additionally, the regression weight presents that knowledge management is the most important skill for a construction manager (0.64). Problem-solving is the most important to engineer (0.59). Regarding foreman, physical skill is the most important (0.67). The findings can be used as a guideline for contractors in developing their staffs to increase project performance.
Uncertain External Pressure Act on Thick Cylinder in Fuzzy Context
Authors: Yukunthorn W , Tariboon J 
Published: October 2019

Abstract
In this paper, we study a thick cylinder with uncertain external pressure. The traditional model was extended in fuzzy context. We use the governing equation which was rewritten as delta operator equation. The interpretations of external pressure are based on triangular, trapezoidal and Gaussian fuzzy numbers. By Adomian Decomposition Method gives an approximate solution. The maximal and minimal radial stresses are obtained, corresponding to the level cut. Finally, we get the methodology for simulating uncertain problems in fuzzy context and utility of each membership function.
Feasibility of a photoelectric sensor technique for nondestructive prediction of granulation disorder in tangerines
Authors: Teerachaichayut S , Kijpadung T , Cheevathumrat V 
Published: October 2019

Abstract
Granulation is a physiological disorder in Tangerine (Citrus reticulata) that can cause an internal disorder which cannot be determined by visual inspection. A nondestructive technique, which is simple and low cost, that could determine whether an individual fruit suffered from granulation would be of help to the citrus industry. The intensity signal of photoelectric sensor, when light passed through tangerines ‘Keaw Dumnuan’ was investigated and showed that the signal was significantly larger (p < 0.05) for normal tangerines and those suffering from granulation. In order to determine a suitable non-destructive method for detect granulation disorder in tangerines that could be applied commercially, a simple and low cost prototype of this photoelectric sensor technique was developed. A set of 52 fruit were used and their average intensity signal from four measurements was used for discriminant analysis. The cut off value of 61.7 mV was used for classification. If a fruit had the signal intensity equal to or less than 61.7 mV, it had granulation, while fruit that had the signal intensity of more than 61.7 mV was normal. Using this signal intensity discrimination the accuracy of classification was 90.4%. It was also shown that the accuracy of prediction was related to the severity of granulation in each fruit. Therefore, the photoelectric sensor technique was shown to be feasible for use in nondestructively detect of granulation in tangerines and be possibly used in future grading systems.
Sensory Evaluation and Acceptability of Bambusa blumeana as Bamboo Shoot Polvoron
Authors: Elumbra R 
Published: October 2019

Abstract
The Bamboo shoots of the grassy Poacaea family have fibre, potassium and lignans, which are believed to hold anti-cancer, antibacterial, anti-fungal and anti-viral properties, according to agsyt.wsu.edu. There is already a legion of studies, pertaining to the use of bamboo shoots as the main ingredients in baked goods. An example is the Polvoron. This is one of the popular Filipino desserts, especially among young ones. This study presents a new polvoron flavor derived from the bamboo shoot (bayog) powder. The product also underwent nutritional analysis which was conducted by the Food and Nutrition Research Institute Service Laboratory. This study aimed to develop processed bamboo shoot into polvoron along with its sensory evaluation and acceptability among consumers. The researchers used an experimental design for the four treatments with different proportion of bamboo shoot powder for every treatment employed during the evaluation. There were 50 untrained respondents. Respondents were able to select and evaluate the products using the Semantic scale for the colour, taste, texture and odour and hedonic scale and facial hedonic scale for the general acceptability of the product. Results showed that Treatment 3 had the most acceptable treatment with a mean value of 7.95, interpreted as Like Very Much with light brown, pronounced bamboo shoot flavour, moderately smooth texture and moderately detected bamboo odour. Hence the incorporation of powdered bamboo shoots into polvoron is widely acceptable among its consumers.
Effect of passion fruit juice and pectin on characteristics of Purple Yard Long Bean jam
Authors: Natnicha T , Kanyarat L , Kraiyot S 
Published: October 2019

Abstract
The present study aims at studying the amounts of passion fruit juice (21.1, 23.3 and 25%) and the amounts of pectin (0.5, 1 and 1.5) optimum to produce Purple Yard Long Bean jam (Vigna unguiculata subsp. sesquipedalis) cv. Sirindhorn No.1. The results showed that jam with 21.1% of passion fruit juice and 0.5% of pectin had the highest pH value and the lowest Rupture Strength. The water activity value and total soluble solids of 3 formulas jam were not statistically different. Jam with 25% of passion fruit juice and 1.5% of pectin had increasing of L* value and decreasing of a* value. Sensory evaluation showed that the jam with 21.1% of passion fruit juice and 0.5% of pectin gained the highest hedonic score in terms of odor, taste, texture, spreadability and overall preference. Purple Yard Long Bean jam with 21.1% of PJF and 0.5% of pectin had with higher fiber content than in commercial products.
Adsorption of Ammonia Nitrogen in Aqueous Solution Using Zeolite A
Authors: Assawasaengrat P , Rueangdechawiwat R 
Published: October 2019

Abstract
The capacity of alternative adsorbents including rice straw, delignified rice straw and zeolite A for ammonia nitrogen removal from aqueous solution was investigated. The adsorption experiments were carried out in batch system with initial ammonia nitrogen concentration of 0.5 mg-N/l, 1000 ml ammonia nitrogen solution for 1 g of adsorbent. Experimental data indicated that rice straw and delignified rice straw cannot adsorb ammonia nitrogen. However, zeolite A provided rapidly adsorption capacity for ammonia nitrogen removal. The amount of ammonia nitrogen adsorbed by zeolite A was 0.256 mg/g at 1 minute after the experiment was initially conducted and slightly stable at 0.275 mg/g after 10 minutes. The adsorption experiments were carried out at 0.25, 0.5, 1.0, 2.0, 4.0, and 8.0 mg-N/l of ammonia nitrogen concentration. The results indicated that zeolite A had the adsorption capacity of 0.102, 0.294, 0.551, 1.153, 2.303, and 3.897 mg/g respectively at equilibrium time. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. Based on R2, Freundlich model was more promising to represent the adsorption data than Langmuir model.