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Transportation engineering 2023年 13卷

作者： Syammaun, Tamalkhani Husaini Abdullah Isya, Muhammad Rachman, Firmansyah Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Civil Engineering Universitas Muhammadiyah Aceh Banda Aceh23123 Indonesia Department of Mechanical Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Civil Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia

The disposal of eggshells in landfills presents an ongoing global environmental issue that demands immediate attention. However, a promising solution lies in utilizing eggshells as modifiers in bitumen binders, offering a sustainable approach to alleviating this burden. This study focuses on crushing eggshells to produce eggshell ash, which is then explored as a potential modifier in bitumen binders. The objective is to evaluate the properties of modified bitumen binders incorporating eggshell waste sourced from the food industry and examine their application in bitumen engineering. The optimal weight percentage of eggshell ash in the bitumen is determined, considering four levels (5, 7, 10 and 12%) and two heating temperatures (100 and 200 °C). Several tests are conducted to comprehensively evaluate the eggshell ash, including SEM-EDS and FTIR analyses, providing valuable technical insights into its properties. Additionally, DSR measurements are employed to analyze the characteristics of the bitumen incorporating eggshell ash. The primary oxide group present in the eggshell ash is CaCO3. Notably, higher concentrations of eggshell ash enhance the resistance of bitumen binders to high temperatures, as indicated by the penetration index results. Furthermore, DSR testing reveals that adding eggshell ash increases the rigidity of the bitumen binders, resulting in improved resistance to deformation. © 2023 The Author(s)

关键词： Binders

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A method on tracking common boundaries of color regions in function approximation-based image coding

A method on tracking common boundaries of color regions in f...

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IEEE Pacific Rim Conference on Communications, Computers and Signal Processing

作者： T. Sugiyama P.W.H. Kwan K. Toraichi K. Katagishi Doctoral Program Graduate School of Systems and Information Engineering University of Tsukuba Japan Core Research for Evolutional Science & Technology Program Japan Science and Technology Corporation Japan Institute of Information Sciences and Electronics University of Tsukuba Japan

A boundary tracking method crucial to function approximation-based image coding is proposed that solves the problems caused by duplicate tracking the common boundaries of color regions when methods conventionally applied to bilevel raster images are inappropriately used. Experimental evaluation is performed to verify its effectiveness.

关键词： Function approximation Image coding Colored noise Color Image reconstruction Systems engineering and theory Electronic mail Performance evaluation Spline Internet

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Single Bean Region of Interest Auto-Detection in a Coffee Beans Image Towards Thorough Quality Inspection

Single Bean Region of Interest Auto-Detection in a Coffee Be...

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International Conference on Instrumentation Control and Automation (ICA)

作者： Gema Nuran Utomo Amalia Rakhmawati Vebi Nadhira Endang Juliastuti Suprijanto Suprijanto Master's Program in Instrumentation and Control Institut Teknologi Bandung Bandung Indonesia Doctoral Program in Engineering Physics Institut Teknologi Bandung Bandung Indonesia Instrumentation and Control Reaserch Group Institut Teknologi Bandung Bandung Indonesia

Indonesia was declared the world's fourth-largest coffee bean producer in 2020 and yields consistently increase each year. Indonesia also has the Indonesian National Standard (SNI) 01-2907-2008, which specifies various defects with the defect scores of coffee beans that determine their quality. Common coffee bean defects listed in SNI 01-2907-2008 include black beans, broken black beans, partly black beans, and brown coffee beans. These defects degrade the quality and affect the market value. Previous studies have proposed computer vision systems as a non-invasive testing method for grading coffee beans based on trained images. However, obtaining the detail in a single bean image based on the region of interest could have been more comprehensively explained in those studies, making them less informative and requiring a more detailed conceptual breakdown. This study describes several coffee beans captured as images using a digital camera with a specific field of view, F/25 f-number, 1/60s exposure time, ISO400, and a lighting system reaching 12,000 lux. These images are processed based on the region of interest and centroid, resulting in single bean images with a resolution of 220 x 220 pixels ready for training. The samples used in this study are Robusta Lampung coffee beans, which are commonly found in Indonesia and exhibit various types of defects based on the criteria in SNI 01-2907-2008, such as black beans, broken black beans, partly black beans, and brown coffee beans.

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An Investigation of Hydro-morphology Contributory Factors in Flooding and Sedimentation Problems on the Krueng Buloh River, Indonesia

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Open Civil engineering Journal 2023年 17卷

作者： Listia, Vina Munirwansyah, Munirwansyah Azmeri, Azmeri Yulianur, Alfiansyah Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh Darussalam 23111 Indonesia Department of Civil Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh Darussalam 23111 Indonesia

Introduction: Process-based river hydrology and morphological analyses are infrequent, especially in developing countries. Climate change and the expected occurrence of major floods and erosion that could threaten the safety of nearby and downstream settlements, especially in areas that are very sensitive and affected by global warming, have made this kind of investigation necessary. Methods: The watershed of the River Krueng Buloh is prone to severe flooding, which has many social and economic effects on the villages nearby, such as the loss of crops and the destruction of buildings. However, the hydro-morphology and fluctuation of this river have not yet been studied. This research aims to determine which factors influence the stability of a river channel in the downstream region of the Krueng Buloh watershed following flooding or erosion. Results: To achieve this objective, field, and satellite-based observations of the hydro-morphology of a Krueng Buloh watershed have been performed. The investigation reveals that floods and sediment accumulation in the floodplain were triggered by excessive rainfall, the meandering of the river, and the riverbank soil type. Conclusion: The conclusions and methods given can be used to evaluate flooding and sedimentation in rivers for future operations to protect and preserve rivers. © 2023 Listia et al.

关键词： Erosion Flood Hydrology Morphology River Sedimentation Watershed

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Automating RTGC with PID Control: Utilizing Camera-Based Image Processing and Object Detection

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IFAC-PapersOnLine 2024年第7期58卷 299-304页

作者： Steven Bandong Yul Y. Nazaruddin Augie Widyotriatmo Muhammad R. Miransyahputra Yan Setiaji Engineering Physics Doctoral Program Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia Instrumentation Control and Automation Research Group Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia

The high traffic in the container yard requires effective management, and one method to address this is through automation. The Rubber Tyred Gantry Crane (RTGC) plays a crucial role in container yards. Automating the RTGC involves determining the container’s location and sway angle to provide feedback for the control system. The advancements in computer vision technology offer a unique solution to tackle these challenges. This paper proposes image processing as a means to sense the sway angle and MobileNet SSD to detect the container’s location. The proposed method yields accurate measurement results and is integrated with optimized PID-PD for position and sway angle control in RTGC. The effectiveness of the proposed method is demonstrated through successful performance in both simulation and experiments conducted on a laboratory-scale RTGC prototype.

关键词： port automation RTGC control system computer vision optimization camera based sensor

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Classification of Paddy Leaf Disease Using MobileNet Model

Classification of Paddy Leaf Disease Using MobileNet Model

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International Conference on Computing, engineering, and Design (ICCED)

作者： Fauzan Masykur Kusworo Adi Oky Dwi Nurhayati Doctoral Program Of Information System School Of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Informatics Engineering Muhammadiyah University of Ponorogo Ponorogo Indonesia

ISBN: (纸本)9781665453905

Paddy is a rice-producing plant as a staple food raw material for most of the population in Indonesia. The rice planting process cannot be separated from pests and diseases that can cause crop failure and impact on rice production stocks. Currently, the process of monitoring the development of rice plants is done conventionally by direct observation by farmers. Meanwhile, in this paper, a classification model and determination of object detection in rice plants infected with pests and diseases is proposed based on leaf color. Leaf classification applies convolution conditional network algorithm with mobilenet as the architecture. The leaf image dataset was taken from public data from *** by involving 4 classes, namely healthy leaf images, brownspot, hispa and leafblast images. In each class the leaf images are grouped into 2 groups, namely 70% training and 30% validation. On the mobilenet backbone, it produces 97% accuracy and 22% loss with the time required for 195s 19s/step in 1 epoch round.

关键词： Training Image color analysis Sociology Computer architecture Production Object detection Raw materials

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Sparse object reconstruction from a limited number of projections using the linear programming

Sparse object reconstruction from a limited number of projec...

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IEEE Symposium on Nuclear Science (NSS/MIC)

作者： Meihua Li H. Kudo Jicun Hu R. Johnson Doctoral Program in Engineering University of Tsukuba Tsukuba Japan Institute of Information Sciences and Electronics University of Tsukuba Tsukuba Japan Department of Biomedical Engineering Marquette University WI USA

This paper proposes a simple row-action type iterative algorithm which is appropriate to reconstruct sparse objects from a limited number of projections. The main idea is to use the L/sub 1/ norm to pick up a sparse solution from a set of feasible solutions to the measurement equation. By perturbing the linear program to a quadratic program, we use the duality of the nonlinear programming to construct a row-action type iterative algorithm to find a solution, we also prove that the algorithm converges for any initial image. We show that this method works well in the 3D blood-vessel reconstruction and its computation time is shorter compared to our previous method.

关键词： Linear programming Image reconstruction Iterative algorithms Tomography Subspace constraints Reconstruction algorithms Biomedical engineering Nonlinear equations Quadratic programming Image converters

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Authenticated secret sharing scheme based on GMEMD

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2016年 9569卷 395-405页

作者： Kuo, Wen-Chung Kuo, Shao-Hung Chang, Hong-Yi Wuu, Lih-Chyau Department of Computer Science and Information Engineering National Yunlin University of Science and Technology Douliu Taiwan Graduate School of Engineering Science and Technology Doctoral Program National Yunlin University of Science and Technology Douliu Taiwan

ISBN: (纸本)9783319319599

In secret image sharing schemes, all legal participants provide legitimate shared images and then they can extract the correct secret message. Recently, Wu et al. proposed a high quality data hiding secret sharing scheme with authentication ability. The major contribution of this scheme maintains good stego image quality while being able to verify secret message integrity. However, to ensure the process can work, the secret image’s pixel values larger than 250 must be changed to 250 for Wu’s scheme. Otherwise, extracting the secret image may fail. In other words, for a secret image, a few errors do not make the big difference but it could be distorted severely for some sensitive secrets. In order to improve this shortcoming, a secret image sharing scheme based on General Multi-Exploiting Modification Direction (GMEMD) data hiding technology will be proposed in this paper. According to simulation results and analysis, we can show that the stego image quality in Wu et al.’s scheme or our proposed scheme is larger than 43dB. We also demonstrate the authentication capability to find unauthorized participants. Furthermore, if all participants are legitimate, then the proposed scheme can extract the secret completely without any distortion. © Springer International Publishing Switzerland 2016.

关键词： Authentication

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Analysis of anode surface roughness influence on heaterless hollow cathode discharge

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Physica Scripta 2024年第3期99卷 035607-035607页

作者： Hsieh, Jordan H Huang, Ping-Han Huang, Yi-Lung Juwantono, Heri Li, Yueh-Heng Department of Aeronautics and Astronautics National Cheng Kung University Tainan70101 Taiwan International Doctoral Degree Program on Energy Engineering National Cheng Kung University Tainan70101 Taiwan

This research delves into the influence of cylindrical and planar anode surface roughness on heaterless hollow cathode discharge characteristics. Three surface roughness levels, Ra 1.6 μm, Ra 3.2 μm, and Ra 6.4 μm, along the cylindrical anode’s azimuthal direction and the planar anode’s radial direction, have been selected and modified by the machining process. A central finding is the correlation between the discharge voltage and anode surface roughness. As the roughness increases, cylindrical and planar anodes require less discharge voltage to sustain the primary discharge. This reduction is likely due to the enhanced surface area from the roughness, which aids in electron current collection. The discharge voltage oscillations appear inversely related to the surface roughness of planar anodes, which may be associated with changes in the neutral gas density gradient between the planar anode and the cathode. In contrast, cylindrical anodes show fewer effects from their surface roughness, likely due to the distinct neutral gas flow dynamics. These findings offer insights into standardizing hollow cathode testing and allow future research to explore these interactions more deeply. © 2024 IOP Publishing Ltd.

关键词： Cathodes

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Identification of climate change impact at Raknamo Dam, Kupang, Indonesia 5

Identification of climate change impact at Raknamo Dam, Kupa...

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5th International Conference on Climate Change 2020, ICCC 2020

作者： Nait, C. Bisri, M. Soetopo, W. Prayogo, T. Limantara, L.M. Krisnayanti, D.S. Doctoral Program in Water Resources Engineering Department University of Brawijaya M.T. Haryono Street No. 167 Malang65145 Indonesia Department of Water Resources Engineering University of Brawijaya M.T. Haryono Street No. 167 Malang65145 Indonesia Departement of Civil Engineering Nusa Cendana University Adisucipto Street Penfui PO. BOX 104 Kupang Indonesia

Impacts of climate change have received extensive attention, especially for the semi-arid regions. Raknamo reservoir is located at Kupang Regency, a semi-arid area with significant differences in rainy duration (3-4 months) and dry seasons (8-9 months). This preliminary study aimed to identify the recent factors that caused the delays in initial filling of Raknamo reservoir, which may be affected by climate change. There are three rainfall stations observed surrounding Raknamo watershed, namely Camplong, Naibonat and Raknamo. Direct comparisons were made of rainfall data for 33 years (1986-2019) daily. The climatology station Lasiana was used for climatological data with a data length of 33 years (1986-2019). This research used a qualitative approach, runoff was analyzed using regression analysis. The results showed that factors such as temperature (T), potential evapotranspiration (ETo), and rainfall (R) affected the availability of initial filling in the Raknamo reservoir. The amount of rainfall intensity that is not achieved in one period to fill the reservoir has resulted in the Raknamo reservoir utilization not being optimized. © Published under licence by IOP Publishing Ltd.

关键词： Reservoirs (water)

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