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Arduino-based low-cost electrical load tracking system with a long-range mesh network

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Advances in Manufacturing 2021年第1期9卷 47-63页

作者： Xin-Lin Wang Bora Ha Frank Andrew Manongi Woo-Kyun Jung Yusufu Abeid Chande Jande sung-hoon ahn Department of Mechanical and Aerospace Engineering Seoul National UniversitySeoulSouth Korea School of Materials Energy Water and Environment and Environmental Sciences Nelson Mandela African Institution of Science and TechnologyArushaTanzania Water Infrastructure and Sustainable Energy Futures Centre Nelson Mandela African Institution of Science and TechnologyArushaTanzania Institute of Advanced Machinery and Design Seoul National UniversitySeoulSouth Korea

A system that combines the advantage of the long-range(LoRa)communication method and the structural characteristics of a mesh network for an LoRa mesh network-based wireless electrical load tracking system is *** system demonstrates considerable potential in reducing data loss due to environmental factors in farfield wireless energy *** proposed system can automatically control the function of each node by confirming the data source and eventually adjust the system structure according to real-time monitoring data without manual *** further improve the sustainability of the system in outdoor environments,a standby equipment is designed to automatically ensure the normal operation of the system when the hardware of the base station *** system is based on the Arduino board,which lowers the production cost and provides a simple manufacturing *** conducting a long-term monitoring of a near-field smart manufacturing process in South Korea and the far-field energy consumption of rural households in Tanzania,we have proven that the system can be implemented in most regions,neither confined to a specific geographic location nor limited by the development of local *** system comprises a smart framework that improves the quality of energy ***,the proposed big-data-technology-based power supply policy offers a new approach for prolonging the power supply time of off-grid power plants,thereby providing a guideline for more rural areas with limited power sources to utilize uninterrupted electricity.

关键词： Mesh network Wireless electrical load tracking system Sustainability Off-grid power plant

Practical operating flexibility of a bifunctional freestanding membrane for efficient anion exchange membrane water electrolysis across all current ranges

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Carbon Energy 2024年第9期6卷 306-324页

作者： Hong-Jin Son Jeemin Hwang Min Young Choi Seung Hee Park Jae Hyuk Jang Byungchan Han sung hoon ahn Department of Bio-Chemical Engineering Chosun UniversityGwangjuRepublic of Korea Fuel Cell Research and Demonstration Center Hydrogen Energy Research DivisionKorea Institute of Energy Research(KIER)Buan-gunJeollabuk-doRepublic of Korea Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoulRepublic of Korea Center for Research Equipment Korea Basic Science InstituteDaejeonRepublic of Korea

This study explores a symmetric configuration approach in anion exchange membrane(AEM)water electrolysis,focusing on overcoming adaptability challenges in dynamic ***,a rapid and mild synthesis technique for fabricating fibrous membrane-type catalyst electrodes is *** method leverages the contrasting oxidation states between the sulfur-doped NiFe(OH)_(2) shell and the metallic Ni core,as revealed by electron energy loss *** evaluations confirm that the S–NiFe(OH)_(2) active sites optimize free energy for alkaline water electrolysis *** technique bypasses traditional energy-intensive processes,achieving superior bifunctional activity beyond current *** symmetric AEM water electrolyzer demonstrates a current density of 2 A cm^(-2) at 1.78 V at 60℃ in 1 M KOH electrolyte and also sustains ampere-scale water electrolysis below 2.0 V for 140 h even in ambient *** results highlight the system's operational flexibility and structural stability,marking a significant advance-ment in AEM water electrolysis technology.

关键词： AEM water electrolysis fibrous membrane iR correction free operational stability symmetric configuration

CAD/CAM for scalable nanomanufacturing:A network-based system for hybrid 3D printing

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Microsystems & Nanoengineering 2017年第1期3卷 135-145页

作者： Hae-sung Yoon Hyun-Taek Lee Ki-Hwan Jang Chung-Soo Kim Hyunseo Park Dae-Wook Kim Kunwoo Lee Sangkee Min sung-hoon ahn BK21 Plus Transformative Training Program for Creative Mechanical and Aerospace Engineers Seoul National UniversitySeoul 08826Republic of Korea Department of Mechanical and Aerospace Engineering Seoul National UniversitySeoul 08826Republic of Korea Department of Mechanical Engineering University of Wisconsin-MadisonMadisonWI 53706USA Institute of Advanced Machines and Design Seoul National UniversitySeoul 08826Republic of Korea

Micro-and nano-structuring have been highlighted over several decades in both science and engineering *** addition to continuous efforts in fabrication techniques,investigations in scalable nanomanufacturing have been pursued to achieve reduced feature size,fewer constraints in terms of materials and dimensional complexity,as well as improved process *** this study,based on recent micro-/nanoscale fabrication processes,characteristics and key requirements for computer-aided design and manufacturing(CAD/CAM)systems for scalable nanomanufacturing were *** include a process knowledge database,standardized processing,active communication,adaptive interpolation,a consistent coordinate system,and management of peripheral *** scalable nanomanufacturing,it is important to consider the flexibility and expandability of each process,because hybrid and bridging processes represent effective ways to expand process *** an example,we describe a novel CAD/CAM system for hybrid three-dimensional(3D)printing at the *** novel hybrid process was developed by bridging aerodynamically focused nanoparticle printing,focused ion beam milling,micromachining,and spincoating *** system developed can print a full 3D structure using various inorganic materials,with a minimum process scale of 50 *** most obvious difference versus CAD/CAM at‘conventional’scales is that our system was developed based on a network to promote communication between users and process *** the network-based system,it is also possible to narrow the gap among different processes/*** anticipate that this approach can contribute to the development of CAD/CAM for scalable nanomanufacturing and a wide range of hybrid processes.

关键词： Computer-aided design and manufacturing(CAD/CAM) nanomanufacturing network-based 3D printing

Correction to:Arduino-based low-cost electrical load tracking system with a long-range mesh network

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Advances in Manufacturing 2021年第4期9卷 592-592页

作者： Xinlin Wang Bora Ha Frank Andrew Manongi Woo-Kyun Jung Yusufu Abeid Chande Jande sung-hoon ahn Department of Mechanical and Aerospace Engineering Seoul National UniversitySeoulSouth Korea School of Materials Energy Water and Environment and Environmental Sciences Nelson Mandela African Institution of Science and TechnologyArushaTanzania Water Infrastructure and Sustainable Energy Futures Centre Nelson Mandela African Institution of Science and TechnologyArushaTanzania Institute of Advanced Machinery and Design Seoul National UniversitySeoulSouth Korea

Correction to:***://***/10.1007/s40436-020-00310-5 In the original publication the first author name is published incorrectly as "Xin-Lin Wang".The correct author name should be read as "Xinlin Wang".Also,the correct fund note in the acknowledgement section should be "This research was supported in part by the International S&T Cooperation Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science,ICT&Future Planning(MSIP)(Grant ***-2017K1A3A9A04013801),and by the Basic Research Lab Program through NRF funded by the MSIT(Grant No.2018R1A4A1059976)".The correct author name and correct fund note is available in this correction.

关键词： cost Arduino Basic

Quantification of HBsAg:Basic virology for clinical practice

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World Journal of Gastroenterology 2011年第3期17卷 283-289页

作者： Jung Min Lee Sang hoon ahn Department of Internal Medicine Yonsei University College of Medicine Department of Internal Medicine Institute of GastroenterologyYonsei University College of Medicine Liver Cirrhosis Clinical Research Center

Hepatitis B surface antigen (HBsAg) is produced and secreted through a complex mechanism that is still not fully understood. In clinical fields, HBsAg has long served as a qualitative diagnostic marker for hepatitis B virus infection. Notably, advances have been made in the development of quantitative HBsAg assays, which have allowed viral replication monitoring, and there is an opportunity to make maximal use of quantitative HBsAg to elucidate its role in clinical fields. Yet, it needs to be underscored that a further understanding of HBsAg, not only from clinical point of view but also from a virologic point of view, would enable us to deepen our insights, so that we could more widely expand and apply its utility. It is also important to be familiar with HBsAg variants and their clinical consequences in terms of immune escape mutants, issues resulting from overlap with corresponding mutation in the P gene, and detection problems for the HBsAg variants. In this article, we review current concepts and issues on the quantification of HBsAg titers with respect to their biologic nature, method principles, and clinically relevant topics.

关键词： Hepatitis B virus Hepatitis B surface antigen Quantitative assay Virology

Prediction models of hepatocellular carcinoma development in chronic hepatitis B patients

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World Journal of Gastroenterology 2016年第37期22卷 8314-8321页

作者： Hye Won Lee Sang hoon ahn Department of Internal Medicine Yonsei University College of Medicine Seoul 03722 South Korea Institute of Gastroenterology Yonsei University College of Medicine Seoul 03722 South Korea Liver Cirrhosis Clinical Research Center Seoul 03722 South Korea Brain Korea 21 Project for Medical Science Seoul 03722 South Korea

Chronic hepatitis B virus(HBV) infection is a major cause of cirrhosis and hepatocellular carcinoma(HCC). Applying the same strategies for antiviral therapy and HCC surveillance to all chronic hepatitis B(CHB) patients would be a burden worldwide. To properly manage CHB patients, it is necessary to identify and classify the risk for HCC development in such patients. Several HCC risk scores based on risk factors such as cirrhosis, age, male gender, and high viral load have been used, and have negative predictive values of ≥ 95%. Most of these have been derived from, and internally validated in, treatment-na?ve Asian CHB patients. Herein, we summarized various HCC prediction models, including IPM(Individual Prediction Model), CU-HCC(Chinese University-HCC), GAG-HCC(Guide with Age, Gender, HBV DNA, Core Promoter Mutations and Cirrhosis-HCC), NGM-HCC(NomogramHCC), REACH-B(Risk Estimation for Hepatocellular Carcinoma in Chronic Hepatitis B), and Page-B score. To develop a noninvasive test of liver fibrosis, we also introduced a new scoring system that uses liver stiffness values from transient elastography, including an LSM(Liver Stiffness Measurement)-based model, LSM-HCC, and mR EACH-B(modified REACH-B).

关键词： Chronic hepatitis B Hepatocellular carcinoma Development Prediction models

Transient elastography in chronic hepatitis B: An Asian perspective

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World Journal of Gastroenterology 2010年第41期16卷 5173-5180页

作者： Seung Up Kim Kwang-Hyub Han Sang hoon ahn Department of Internal Medicine Institute of Gastroenterology Yonsei University College of Medicine Seoul 120-752 South Korea Liver Cirrhosis Clinical Research Center Seoul 120-752 South Korea Brain Korea 21 Project for Medical Science Seoul 120-752 South Kore

Transient elastography (TE) is a new non-invasive tool for assessing liver stiffness, which is correlated with the histologic stage of liver fibrosis. Many studies have reported a good accuracy of TE in predicting signif icant fibrosis and an optimal accuracy in predicting cirrhosis. Furthermore, the potential role of TE in screening the general population has also been proven. TE thus helps physicians to decide treatment strategies, predict prog-nosis, and monitor disease progression in patients with chronic liver disease and to screen the general popula-tion to identify high risk patients with potential liver disease. However, most data on the clinical roles of TE have been gathered in European patients with chronic hepatitis C (CHC), because TE was first developed in France. Accordingly, much data on the usefulness of TE in patients with CHC has accumulated. Recently, however, vigorous efforts have been made to apply TEto patients with chronic hepatitis B (CHB), and TE has also proved to have acceptable accuracy in diagnosing liver fibrosis and cirrhosis in these patients. Thus, we focused on TE in the Asian population with CHB in comparison with the European population with CHC and found that the diagnostic performance and cutoff values were different between the 2 populations possibly as a result of several different confounders between Asian and European populations (the etiology of chronic liver disease, histologic features, major fluctuation in alanine aminotransferase levels, and the prevalence of high body mass index and metabolic syndrome). Therefore, further studies tailored to the Asian population with CHB should be performed before the widespread application of TE in Asian populations with CHB.

关键词： Asia Chronic hepatitis B Fibroscan Hepatitis B virus Liver stiffness measurement Transient elas-tography

Post-Translational Regulation of FLOWERING LOCUS T Protein in Arabidopsis

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Molecular Plant 2016年第2期9卷 308-311页

作者： Soo-Jin Kim sung Myun Hong Seong Jeon Yoo Suhyun Moon Hye Seung Jung Ji hoon ahn Creative Research Initiatives Department of Life Sciences Korea University Seoul 136-701 Korea

Dear Editor,Here, we report the developmental regulation of proteolytic cleavage of the FLOWERING LOCUS T （FT） protein. FT, a mem- ber of the phosphatidylethanolamine-binding protein （PEBP） family, functions as a florigen or a component of florigen. PEBP binds phosphoethanolamine, and its ligand-binding domain is evolutionarily conserved from bacteria to plants and animals （Schoentgen and Jolles, 1995; Bradley et al., 1996）. PEBPs regulate important signaling pathways to control growth and differentiation （Chautard et al., 2004）. Some animal PEBP homologs undergo post-translational regulation. For example,

关键词： cleavage functions phosphoethanolamine

Light Intensity and Floral Transition： Chloroplast Says ＂Time to Flower!＂

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Molecular Plant 2016年第12期9卷 1551-1553页

作者： Hendry Susila Suhyun Jin Ji hoon ahn Creative Research Initiatives Department of Life Sciences Korea University Seoul 02841 South Korea

Flowering represents a pivotal developmental transition from the vegetative stage to the reproductive stage. The timing of flower- ing must be carefully controlled under ever-changing environ- mental conditions to ensure successful reproduction. Extensive genetic and molecular biological analyses in the model species Arabidopsis thaliana have identified important regulators of flowering time and revealed a complex network of highly inter- connected pathways that are regulated by seasonal cues （e.g., light and temperature） and internal factors （e.g., age and nutrient availability）（Bouche et al., 2016）.

关键词： Prediction Classification Plant