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Checkpoint Management with Double Modular Redundancy Based on the Probability of Task Completion

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Journal of Computer Science & Technology 2012年第2期27卷 273-280页

作者： Seong Woo Kwak Kwan-ho You jung-Min yang Department of Electronic Engineering Keimyung University School of Information & Communication Engineering Sungkyunkwan University Department of Electrical Engineering Catholic University of Daegu

This paper proposes a checkpoint rollback strategy for real-time systems with double modular *** built-in fault-detection and spare processors,our scheme is able to recover from both transient and permanent *** comparisons are conducted at each ***,the states stored in two consecutive checkpoints of one processor are compared for checking integrity of the *** states of two processors are also compared for detecting faults and the system rolls back to the previous checkpoint whenever required by logic of the proposed scheme.A Markov model is induced by the fault recovery scheme and analyzed to provide the probability of task completion within its *** optimal number of checkpoints is selected so as to maximize the probability of task completion.

关键词： checkpoint scheme double modular redundancy (DMR) real-time task fault tolerance Markov model

Adhesive ginsenoside compound K patches for cartilage tissue regeneration

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Regenerative Biomaterials 2023年第1期10卷 1442-1450页

作者： Jun-ho yang Hyun ho Shin Donghyeon Kim Ji Hyun Ryu Eun-jung Jin Department of Biological Sciences College of Health SciencesWonkwang UniversityIksanJeonbuk 54538South Korea Department of Chemical Engineering Wonkwang UniversityIksanJeonbuk 54538South Korea Department of Carbon Convergence Engineering Wonkwang UniversityIksanJeonbuk 54538South Korea Integrated Omics Institute Wonkwang UniversityIksanJeonbuk 54538South Korea

Biomaterial-based drug delivery systems have been developed to expedite cartilage regeneration;however,challenges related to drug recovery,validation,and efficient drug delivery *** instance,compound K(CK)is a major metabolite of ginsenosides that is known to protect against joint degeneration by inhibiting the production of inflammatory cytokines and the activation of immune ***,its effects on cartilage degradation and tissue regeneration remain ***,tissue-adhesive drug delivery depots that stably adhere to cartilage defects are required for CK *** this study,CK-loaded adhesive patches were reported to seal cartilage defects and deliver CK to defect sites,preventing cartilage degradation and accelerating cartilage tissue *** patches are stable and suitable for application in surgical procedures under physiological conditions and show excellent adhesiveness to cartilage *** addition,there were no significant differences in the adhesive polymeric networks before and after CK ***-loaded hydrocaffeic acid-conjugated chitosan patches significantly inhibited the stimulation of cartilage-degrading enzymes and apoptosis in osteoarthritic cartilage by releasing CK in cartilage ***,the NFkB signaling pathway of released CK from the adhesive patches in the treatment of osteoarthritis is ***,the CK-loaded adhesive patches are expected to significantly contribute to cartilage regeneration.

关键词： ginsenoside compound K adhesive patch drug delivery hydrocaffeic acid-conjugated chitosan osteoarthritis

Analyzing the distinguishing factors that affect childhood obesity in South Korea

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Frontiers of Medicine 2018年第6期12卷 707-716页

作者： So jung yang Hun-Sung Kim Kun-ho Yoon Department of Medical Informatics College of MedicineThe Catholic University of KoreaSeoul 06591Republic of Korea Division of Endocrinology and Metabolism Department of lnternal MedicineSeoul St.Mary's HospitalCollege of MedicineThe Catholic University of KoreaSeoul 06591Republic of Korea

Understanding obesity in children is crucial because it can lead to adulthood obesity and result in fatal chronic diseases. Distinctive factors associated with obesity in adults have been described, but distinctive factors related to children remain unclear. We analyzed the correlation between the percentage of body mass index and lifestyle habits by conducting surveys on physical, nutritional, and psychological factors, and we used annual physical examination data to compare different traits among elementary school students (n = 197) and middle school students (n = 461). Our study revealed that the computing hours in elementary school students with overweight and obesity were significantly correlated with the percentage of body mass index (r = 0.29 on school days and r = 0.35 on days off, all P0.05) in the computing hours of middle school students with overweight and obesity. Childhood obesity can cause depression and reduce children’s quality of life because of their distorted body perception. In conclusion, physical factors directly affecting childhood obesity and psychological and environmental factors surrounding a child should be considered.

关键词： screen time quality of life eating habits childhood obesity percentage of body mass index

Concept study of measuring gravitational constant using superconducting gravity gradiometer

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Chinese Physics B 2018年第8期27卷 130-135页

作者： Xing Bian ho jung Paik Martin Vol Moody University of Chinese Academy of Sciences Beijing 100049China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190China Department of Physics University of MarylandCollege ParkMaryland 20742USA

Newton＇s gravitational constant G is the least known fundamental constant of nature. Since Cavendish made the first measurement of G with a torsion balance over two hundred years ago, the best results of G have been obtained by using torsion balances. however, the uncorrected anelasticity of torsion fibers makes the results questionable. We present a new method of G measurement by using a superconducting gravity gradiometer constructed with levitated test masses, which is free from the irregularities of mechanical suspension. The superconducting gravity gradiometer is rotated to generate a centrifugal acceleration that nulls the gravity field of the source mass, forming an artificial planetary system. This experiment has a potential accuracy of G better than 10 ppm.

关键词： gravitational constant superconducting gravity gradiometer artificial planetary system

Formation Mechanism of Chunky Graphite and Its Preventive Measures

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Journal of Materials Science & Technology 2008年第3期24卷 289-295页

作者： Hideo Nakae Sanghoon jung ho-Chul Shin Department of Materials Science and Engineering Waseda University National Institute of AIST Corporate Res.and Dev.Div. Hyundai.Kia Motors

The formation mechanism of chunky graphite has been reviewed and studied. The study consisted of a unidirectional solidification method, a small droplet method and a furnace cooling method. Four kinds of iron samples were prepared, namely, the pure Fe-C, Fe-C-S, Fe-C-Ce and Fe-C-Si-Ce alloys, and three kinds of nickel samples, namely the Ni-C, Ni-C-S and Ni-C-Mg alloys. The results of the unidirectional solidification of the Ni-C alloys showed that spheroidal graphite is not observed in the continuous solidified region, in which only flake-like graphite is observed, while spheroidal graphite is usually observed in the quenched liquid region. The existence of spheroidal graphite in the solidified phase is recognized only in the discontinuous growth mode of the Ni-C-Mg alloy solidified at 150 mm/h. This means that the spheroidal graphite is directly crystallized from the melt and entrapped by the flake-like chunky graphite that is formed by the continuous growth mode. In the small droplet method, a small piece of the Fe-C or Fe-C-Ce sample was melted on a pure graphite plate then cooled at a different cooling rate in a He-3%H2 atmosphere. The graphite in the Fe-C-Ce alloy is usually spherical. Nevertheless, the graphite morphology of the final solidified area changed from spherical to chunky and chunky to ledeburite with an increase in the cooling rate. This means that the chunky graphite is formed in the residual liquid region by the solidification into Fe-graphite system. The sample was cooled in a furnace, and the graphite morphology changes from spherical to chunky and chunky to ledeburite with the decrease in the Si content. These phenomena can be confirmed by the cooling curves of these samples.

关键词： Chunky graphite Spheroidal graphite Solidification Cooling curve

Preoperative defining system for pancreatic head cancer considering surgical resection

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World Journal of Gastroenterology 2016年第26期22卷 6076-6082页

作者： Seok Jeong yang ho Kyoung Hwang Chang Moo Kang Woo jung Lee Department of Surgery Ulsan University Hospital University of Ulsan College of Medicine Department of Hepatobiliary and Pancreatic Surgery Yonsei University College of Medicine Pancreaticobiliary Cancer Clinic Yonsei Cancer Center Institute of Gastroenterology Yonsei Severance Hospital

AIM: To provide appropriate treatment, it is crucial to share the clinical status of pancreas head cancer among multidisciplinary treatment ***: A retrospective analysis of the medical records of 113 patients who underwent surgery for pancreas head cancer from January 2008 to December 2012 was performed. We developed preoperative defining system of pancreatic head cancer by describing “resectability - tumor location - vascular relationship - adjacent organ involvement - preoperative CA19-9 (initial bilirubin level) - vascular anomaly”. The oncologic correlations with this reporting system were ***: Among 113 patients, there were 75 patients (66.4%) with resectable, 34 patients (30.1%) with borderline resectable, and 4 patients (3.5%) with locally advanced pancreatic cancer. Mean disease-free survival was 24.8 mo (95%CI: 19.6-30.1) with a 5-year disease-free survival rate of 13.5%. Pretreatment tumor size ≥ 2.4 cm [Exp(B) = 3.608, 95%CI: 1.512-8.609, P = 0.044] and radiologic vascular invasion [Exp(B) = 5.553, 95%CI: 2.269-14.589, P = 0.002] were independent predictive factors for neoadjuvant treatment. Borderline resectability [Exp(B) = 0.222, P = 0.008], pancreatic head cancer involving the pancreatic neck [Exp(B) = 9.461, P = 0.001] and arterial invasion [Exp(B) = 6.208, P = 0.010], and adjusted CA19-9 ≥ 50 [Exp(B) = 1.972 P = 0.019] were identified as prognostic clinical factors to predict tumor ***: The suggested preoperative defining system can help with designing treatment plans and also predict oncologic outcomes.

关键词： Preoperative defining system Pancreas head cancer Borderline resectable Adjusted CA19-9 Neoadjuvant therapy

Application of Thermodynamic Database to Corrosion of ZrO_(2) Containing Submerged Entry Nozzle in Steel Continuous Casting Process

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China's Refractories 2024年第2期33卷 10-15页

作者： In-ho jung Department of Materials Science and Engineering Seoul National UniversitySeoul 08826South Korea Research Institute of Advanced Materials Seoul National UniversitySeoul 08826South Korea

The CALPHAD thermodynamic databases are very useful to analyze the complex chemical reactions happening in high temperature material *** FactSage thermodynamic database can be used to calculate complex phase diagrams and equilibrium phases involving refractories in industrial *** this study,the FactSage thermodynamic database relevant to ZrO_(2)-based refractories was reviewed and the application of the database to understanding the corrosion of continuous casting nozzle refractories in steelmaking was presented.

关键词： thermodynamic database ZrO_(2)containing submerged entry nozzle continous casting

Fossil-Winged Fruits of Fraxinus(Oleaceae) and Liriodendron(Magnoliaceae) from the Duho Formation,Pohang Basin,Korea

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Acta Geologica Sinica(English Edition) 2009年第5期83卷 845-852页

作者： Seung-ho jung Seong-Joo LEE Department of Geology Kyungpook National UniversityDaegu 702-701Korea

A total of 16 specimens of fossil-winged fruits were found from the Middle Miocene marine deposits, Duho Formation, Pohang Basin, Korea. They were identified into two structurally different groups： 15 specimens into a winged fruit of Fraxinus, and one specimen of Liriodendron. The most samaras （13 specimens） were identified as Fraxinus oishii, which is characterized by narrowly ovate or ovate-elliptic shapes that are 2.7-3.6 cm in length and 0.7-1 cm in width （i/w ratio=3.4-4）. The apexes of the Fraxinus oishii samara are round or slightly emarginated, and a seed of the samara is always located at the base, of which the general shape is narrow rhombic-ellipsoidal. The seed is 1.2-2 cm long and 0.5-0.7 cm wide. Two specimens are different from the samara of Fraxinus oishii. They have a 6.6 length/width ratio （3.3 cm long and 0.5 cm wide）, and thus, are temporarily classified into the Fraxinus sp. One specimen was recognized as a winged seed of Liriodendron meisenense. The wing is broadly lanceolate to elliptic in shape, has a smooth, acute apex, and is approximately 3 cm long and 0.7 cm wide. Samaras of Fraxinus oishii and Liriodendron meisenense were early reported from the Middle Miocene deposits from North Korea, but these specimens are the first discovery in South Korea. Further study of the Duho Formation may connect flora relationships between North and South Korea.

关键词： winged fruits Fraxinus Liriodendron Middle Miocene Pohang Basin Korea

Enhancing BiVO_(4)photoanode performance by insertion of an epitaxial BiFeO_(3)ferroelectric layer

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Journal of Energy Chemistry 2024年第2期89卷 71-78,I0003页

作者： Haejin Jang Yejoon Kim hojoong Choi Jiwoong yang Yoonsung jung Sungkyun Choi Donghyeon Lee ho Won Jang Sanghan Lee School of Materials Science and Engineering Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea

BiVO_(4)(BVO)is a promising material as the photoanode for use in photoelectrochemical ***,the high charge recombination and slow charge transfer of the BVO have been obstacles to achieving satisfactory photoelectrochemical *** address this,various modifications have been attempted,including the use of ferroelectric *** materials can form a permanent polarization within the layer,enhancing the separation and transport of photo-excited electron-hole *** this study,we propose a novel approach by depositing an epitaxial BiFeO_(3)(BFO)thin film underneath the BVO thin film(BVO/BFO)to harness the ferroelectric property of *** self-polarization of the inserted BFO thin film simultaneously functions as a buffer layer to enhance charge transport and a hole-blocking layer to reduce charge *** a result,the BVO/BFO photoanodes showed more than 3.5 times higher photocurrent density(0.65 mA cm^(-2))at 1.23 V_(RHE)under the illumination compared to the bare BVO photoanodes(0.18 m A cm^(-2)),which is consistent with the increase of the applied bias photon-to-current conversion efficiencies(ABPE)and the result of electrochemical impedance spectroscopy(EIS)*** results can be attributed to the self-polarization exhibited by the inserted BFO thin film,which promoted the charge separation and transfer efficiency of the BVO photoanodes.

关键词： Photoelectrochemical Photoanode BiVO_(4) Ferroelectric materials BiFeO_(3)