• 교육시설 논문지
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• 제26권5호
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• pp.3-10
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• 2019

This study has a purpose to profile local sectors into meaningful groups by using facilities rates of Social Overhead Capital(SOC) for daily life. Comparing SOC for daily life among the meaningful groups, the profiling and comparison results bring the comprehensive understanding about the educational facilities in local sectors. For the research purpose, this study utilized Latent Profile Analysis(LPA) by using variables such as population, road information, SOC for daily life, usage of land, possession of land, and appraised value of land from the 2018 Geographic Information System(GIS) dataset of Gwangjin-gu, where is one of the administrative district of Seoul City. Results showed that there are four latent groups of sectors among 904 local sectors(100 squared-meters sector per each) in Gwangjin-gu. By comparing the four latent groups by using LPA, the results diagnose each sector's status and help to improve the policy about educational facilities. Specifically, by using dataset for SOC of daily life, there are four groups of local sectors and each group has different features. Based on the different features of local sector groups, there can be improved management of educational facilities matching with each group's features.

• Journal of Information Science Theory and Practice
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• 제9권3호
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• pp.56-75
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• 2021

We introduce a new research assessment measure, called the research excellence index. The measure, which we denote by RE-index, accurately assesses the research performance of a researcher. The methodology used in deriving the RE-index tackles many of the flaws of popular research performance indicators such as publication counts, citation counts, and the h and g indices. A dataset is introduced, which takes advantage of the wide coverage of Scopus and the Library of Congress, and, at the same time, deals with the Scopus database depth problem. For an academic publication x, a prestige-type and length scores are assigned, and if x is published in an academic periodical publication J, the stature of J is identified through a quartile score. The three scores are used to assign a value score to every academic publication, and cited academic publications are given citation scores that encompass both cases of including and excluding self-citations. The foregoing scores are used to derive another set of scores measuring the combined qualitative and quantitative aspects of the creative work, citations of creative work, informative work and citations of informative work of a researcher. The scores take into consideration co-authorship. From these scores, two versions of the RE-index for a researcher are derived, covering the cases of including and excluding self-citations. The new measure is calculated for two mathematicians.

• 정보보호학회논문지
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• 제12권4호
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• pp.87-98
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• 2002

현재는 유형적인 물질의 가치보다 무형적인 정보의 가치가 중요시되고 있는 시대이다. 특히 하드웨어보다는 소프트웨어 제품이 훨씬 급성장하고 있지만 소프트웨어 불법 복제는 정보화시대의 가장 큰 역기능으로 이슈화 되어있다. 그러나 현재 상용화되고 있는 소프트웨어 불법복제방지제품(락)들은 복제방지에 대한 강도가 약하기 때문에 쉽게 락이 크랙되어 복제방지 기능을 할 수 없는 것들이 대부분이다. 논자는 [1,2,3]에서 DES 암호알고리즘을 대체 할 수 있는 112비트 키 길이를 갖는 96비트 블록 Cipher를 제안한 바 있으며, [3.4]에서 칩으로 하였다. 따라서 본 논문은 [1,2,3]에서 제안한 96비트 블록 Cipher와 복제방지에 필요한 보안모듈을 ASIC화하여 소프트웨어 복제방지를 위한 전용 보안칩을 설계 및 구현하며, 보안칩과 연동하여 동작되는 자동블록보호기법을 설계한다.

• Imaging Science in Dentistry
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• 제52권2호
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• pp.187-195
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• 2022

Purpose: This study developed a convolutional neural network (CNN) model to diagnose maxillary sinusitis on panoramic radiographs(PRs) and cone-beam computed tomographic (CBCT) images and evaluated its performance. Materials and Methods: A CNN model, which is an artificial intelligence method, was utilized. The model was trained and tested by applying 5-fold cross-validation to a dataset of 148 healthy and 148 inflamed sinus images. The CNN model was implemented using the PyTorch library of the Python programming language. A receiver operating characteristic curve was plotted, and the area under the curve, accuracy, sensitivity, specificity, positive predictive value, and negative predictive values for both imaging techniques were calculated to evaluate the model. Results: The average accuracy, sensitivity, and specificity of the model in diagnosing sinusitis from PRs were 75.7%, 75.7%, and 75.7%, respectively. The accuracy, sensitivity, and specificity of the deep-learning system in diagnosing sinusitis from CBCT images were 99.7%, 100%, and 99.3%, respectively. Conclusion: The diagnostic performance of the CNN for maxillary sinusitis from PRs was moderately high, whereas it was clearly higher with CBCT images. Three-dimensional images are accepted as the "gold standard" for diagnosis; therefore, this was not an unexpected result. Based on these results, deep-learning systems could be used as an effective guide in assisting with diagnoses, especially for less experienced practitioners.

• Nuclear Engineering and Technology
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• 제54권1호
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• pp.11-18
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• 2022

In this research, curium oxide (CmO₂) is studied as fuel for VVER-1200 reactor to get an attention to its energy value and possibilities. For this purpose, CmO₂ is used in fuel rods or integrated burnable absorber (IBA) rods with and without UO₂ and then compared with the conventional fuel assembly of VVER-1200 reactor. It is burned to 60 GWd/t by using SRAC-2006 code and JENDL-4.0 data library. From these studies, it is found that CmO₂ is competent like UO₂ as a fuel due to higher fission cross-section of ²⁴³Cm and ²⁴⁵Cm isotopes and neutron capture cross-section of ²⁴⁴Cm and ²⁴⁶Cm isotopes. As a result, when some or all of the UO₂ of fuel rods or IBA rods are replaced by CmO₂, we get a similar k-inf like the reference even with lower enrichment UO₂ fuels. These studies show that the use of CmO₂ as IBA rods is more effective than the fuel rods considering the initially loaded amount, power peaking factor (PPF), fuel temperature and void coefficient, and the quality of spent fuel. From a detailed study, 3% CmO₂ with inert material ZrO₂ in IBA rods are recommended for the VVER-1200 reactor assembly from the once through concept.

• International Journal of Computer Science & Network Security
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• 제21권12호
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• pp.35-40
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• 2021

The study aimed to realize one of the basic requirements for designing and building the integrated automated system for scientific research at Northern Border University, which includes the establishment of an automated interconnected system to manage all academic and financial operations of scientific research. From receiving the budget of the funded research courses, then the regular financial regulation of all the research team's rewards, the cost of publishing, translation and equipment, then receiving the research plans and linking them financially, preparing the total and detailed financial value for all stages, then financial disbursement operations, financial closure of research when published, and preparing financial reports The research team used the analytical approach to build the main and subsidiary requirements for designing the financial system, and the study concluded that all the elements required for the stages of financial management for scientific research at Northern Border University can be met based on sufficient by sequencing these processes and how they are sequenced as e It is designed in the research study.

• 대한융합한의학회지
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• 제2권1호
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• pp.23-34
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• 2021

Objectives: This study aimed to review the effects of Daoyin exercise on scoliosis in clinical studies. Methods: In this study, we reviewed 9 electronic databases (Pubmed, CAJ, EMBASE, Cochrane Library, CiNii, KISS, KMBASE, OASIS, ScienceON) on May 22, 2021. We included only randomized controlled trials (RCTs) which evaluated the effect of Daoyin exercise on scolisos. The methodological quality of the included studies was checked using the Cochrane risk of bias tool. Results: After screening, eight RCTs fulfilled the inclusion criteria. The results of the meta-analysis showed that Daoyin exercise improves the measurement value of Cobb's angle, SRS-22, pulmoary function, physiological curvature, muscle strength, effective rate in scoliosis patients. Conclusion: We concluded that Daoyin exercise has therapeutic effects in relief of imbalance, improvement of symptoms, improvement of function, muscle strength for scoliosis. However, the quality of the original articles was low and the number of papers included were few. Thus, to confirm these results, further well-designed RCTs should be conducted.

• Nuclear Engineering and Technology
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• 제55권12호
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• pp.4518-4526
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• 2023

NECP-SARAX is a neutronics analysis code system for advanced reactor developed by Nuclear Engineering Computational Physics Laboratory of Xi'an Jiaotong University. In past few years, improvements have been implemented in TULIP code which is the cross-section generation module of NECP-SARAX, including the treatment of resonance interface, considering the self-shielding effect in non-resonance energy range, hyperfine group method and nuclear library with thermal scattering law. Previous studies show that NECP-SARAX has high performance in both fast and thermal spectrum system analysis. The accuracy of TULIP code in fast and thermal spectrum system analysis is demonstrated preliminarily. However, a systematic verification and validation is still necessary. In order to validate the applicability of TULIP code for full energy range, 147 fast spectrum critical experiment benchmarks and 170 thermal spectrum critical experiment benchmarks were selected from ICSBEP and used for analysis. The keff bias between TULIP code and reference value is less than 300 pcm for all fast spectrum benchmarks. And that bias keeps within 200 pcm for thermal spectrum benchmarks with neutron-moderating materials such as polyethylene, beryllium oxide, etc. The numerical results indicate that TULIP code has good performance for the analysis of fast and thermal spectrum system.

• 마이크로전자및패키징학회지
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• 제28권2호
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• pp.81-88
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• 2021

본 논문에서는 LTCC(Low Temperature Co-fired Ceramic) 기판을 적용하여 24 GHz 대역 회로에서 활용될 수 있는 수동소자 라이브러리를 구현하였다. 회로에서 사용 목적에 따라 큰 용량 값의 수동소자가 필요하며, 기본 구조인 전극 커패시터와 Spiral 구조 인덕터로 설계할 수 있지만, SRF(Self-Resonant Frequency)가 사용 주파수인 24 GHz 보다 낮아 고주파 영역에서는 활용이 불가능하다. 이러한 주파수 한계를 해결하기 위해, DC와 고주파 영역 사용 수동소자를 분류하여 제안하였다. 기본 구조는 DC와 같은 1~2 GHz 미만의 낮은 주파수 사용에 적합하다. 24 GHz 대역인 고주파용으로는 마이크로스트립 λ/8 길이 stub 구조를 제안하였고, open 및 short stub 구조는 각각 커패시터 및 인덕터로 동작하고, stub 고유의 임피던스 값을 가진다. 여기서 임피던스 계산식을 통해 수동소자 용량 값을 얻을 수 있다. 본 논문에서 고안한 수동소자는 유전율 7.5인 LTCC 기판으로 제작하고 측정하여, DC 사용 기본 구조 커패시터와 인덕터는 각각 2.35~30.44 pF, 0.75~5.45 nH 용량의 라이브러리를 구성하였다. 고주파 영역에서 사용 가능한 stub 구조의 커패시터와 인덕터는 각각 0.44~2.89 pF, 0.71~1.56 nH 으로 라이브러리를 구축하였다. 측정을 통해 용량 값을 다양화하는 방법을 검증하였으므로 더욱 세분화된 라이브러리를 구현할 수 있으며, 사용 주파수 24 GHz 대역의 레이더 모듈에서 다층 기판동작 회로와 집적화할 수 있는 수동소자의 대안이 될 것이다.