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Journal of Materials Science & Technology 2010年第4期26卷 379-384页

作者： Bin Yu Guangfeng Zhao honam lim Jinik Lira Yongkeun Lee Department of Dental Materials and Center for Dental Materials School of Dentistry Kyung Hee University Seoul Korea Denforus co. Seaul Korea

Color stability of dental resin modified glass ionomer （RMGI） has been a challenge to dentistry; therefore, systematic changes in 2-hydroxyethyl methacrylate （HEMA） content were performed experimentally to find an idea to enhance the color stability. Changes in color （△E＊ab） and color coordinates （△L＊, △a＊ and △b＊） of experimental 10-50 wt pct HEMA-added dental glass ionomers （HAGIs） and corresponding RMGIs were determined after 5000 cycles of thermocycling. Color changes of HAGIs were not influenced by the HEMA content while △L＊, △a＊ and △b＊ values were influenced by the HEMA content. Color stability of 30% or 40% HEMA-added HAGIs was not different from those of the commercial RMGIs. Since the influence of HEMA itself on the color stability of HAGIs was limited, compositional modification to increase the color stability of these materials should be developed.

关键词： Glass ionomer 2-hydroxyethyl methacrylate （HEMA） Color coordinate Thermocycling

An Improved Time Feedforward Connections Recurrent Neural Networks

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Intelligent Automation & Soft Computing 2023年第6期36卷 2743-2755页

作者： Jin Wang Yongsong Zou Se-Jung lim School of Hydraulic&Environmental Engineering Changsha University of Science&TechnologyChangsha410014China School of Computer&Communication Engineering Changsha University of Science&TechnologyChangsha410014China AI Liberal Arts Studies Division of ConvergenceHonam UniversityGwangju-si62399Korea

Recurrent Neural Networks(RNNs)have been widely applied to deal with temporal problems,such as flood forecasting and financial data processing.On the one hand,traditional RNNs models amplify the gradient issue due to the strict time serial dependency,making it difficult to realize a long-term memory function.On the other hand,RNNs cells are highly complex,which will signifi-cantly increase computational complexity and cause waste of computational resources during model training.In this paper,an improved Time Feedforward Connections Recurrent Neural Networks(TFC-RNNs)model was first proposed to address the gradient issue.A parallel branch was introduced for the hidden state at time t−2 to be directly transferred to time t without the nonlinear transforma-tion at time t−1.This is effective in improving the long-term dependence of RNNs.Then,a novel cell structure named Single Gate Recurrent Unit(SGRU)was presented.This cell structure can reduce the number of parameters for RNNs cell,consequently reducing the computational complexity.Next,applying SGRU to TFC-RNNs as a new TFC-SGRU model solves the above two difficulties.Finally,the performance of our proposed TFC-SGRU was verified through sev-eral experiments in terms of long-term memory and anti-interference capabilities.Experimental results demonstrated that our proposed TFC-SGRU model can cap-ture helpful information with time step 1500 and effectively filter out the noise.The TFC-SGRU model accuracy is better than the LSTM and GRU models regarding language processing ability.

关键词： Time feedforward connections long-short term memory gated recurrent unit SGRU RNNs

A Novel Beam Search to Improve Neural Machine Translation for English-Chinese

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Computers, Materials & Continua 2020年第10期65卷 387-404页

作者： Xinyue Lin Jin Liu Jianming Zhang Se-Jung lim College of Information Engineering Shanghai Maritime UniversityShanghai201306China School of Computer and Communication Engineering Changsha University of Science and TechnologyChangsha410114China Liberal Arts&Convergence Studies Honam UniversityGwangju62399Korea

Neural Machine Translation(NMT)is an end-to-end learning approach for automated translation,overcoming the weaknesses of conventional phrase-based translation systems.Although NMT based systems have gained their popularity in commercial translation applications,there is still plenty of room for improvement.Being the most popular search algorithm in NMT,beam search is vital to the translation result.However,traditional beam search can produce duplicate or missing translation due to its target sequence selection strategy.Aiming to alleviate this problem,this paper proposed neural machine translation improvements based on a novel beam search evaluation function.And we use reinforcement learning to train a translation evaluation system to select better candidate words for generating translations.In the experiments,we conducted extensive experiments to evaluate our methods.CASIA corpus and the 1,000,000 pairs of bilingual corpora of NiuTrans are used in our experiments.The experiment results prove that the proposed methods can effectively improve the English to Chinese translation quality.

关键词： Neural machine translation beam search reinforcement learning

Compensation of image noise induced by difference in optical characteristics of array-LED chips of LED print head

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Science China(Technological Sciences) 2017年第12期60卷 1819-1830页

作者： KIM Wan-Chin PARK Yong-Shik KIM Sung-Dae lim Jiseok Department of Automotive Engineering Honam University Gwansan-gu Gwangju 62399 Korea Mangoslab Co. Ltd. Startupeampus 20 Pangyo-ro 289beon-gil Bundang-gu Seongnam-si Gyeonggi-do 13488 Korea S-Printing Solution Co. Ltd. (Samsung Electronics Ltd) Suwon Gyeonggi-do 443-742 Korea School of Mechanical Engineering Yeungnam University Gyeongsan Gyeongbuk 38541 Korea

There are various applied electro-optical devices, which utilize light emitting didoe(LED) chip array for applications to displays and opto-electronic sensors. In those devices, it is the one of the critical technical issues to minimize uncertain fluctuations including optical power and optical density. Due to variation in operating environment of a device, those are not corrected precisely by controlling parameters based on simple relation between parameters and resultant abovementioned outputs.Therefore, there is essential need to correct outputs in real-time based on correction function generated from the consideration on various operation condition. In this article, we introduce an output correction method through reporting real-time image noise reduction in the application to electro-photography with LED print head. In the technology of LED print head, as differences in optical characteristics between each LED cause vertical image noise, it should be corrected in order to obtain images that are comparable or better in quality compared to those produced by the conventional laser scanning method. Even though it seems that the method used to obtain uniform light power from each LED can solve this problem, it does not work well for high-resolution printing. Therefore, a scan method involving correction by a printed and scanned pattern is introduced through this work. The scan method is composed of correction patterns to minimize printing noise by its shape, the correction algorithm to calculate the optimized value and the printing algorithm to control gray levels in real-time precisely. We believe that the developed correction method upgrades the printing quality of the LPH printer better than commercial printers. The developed correction method can also be applied to various application areas that use an array-type light source such as display systems and lighting systems.

关键词： real-time image correction LED print head(LPH) vertical image noise electro-photography temporal correction spatial correction

Parameters Compressing in Deep Learning

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Computers, Materials & Continua 2020年第1期62卷 321-336页

作者： Shiming He Zhuozhou Li Yangning Tang Zhuofan Liao Feng Li Se-Jung lim School of Computer and Communication Engineering Hunan Provincial Key Laboratory of Intelligent Processing of Big Data on TransportationChangsha University of Science and TechnologyChangsha410114China Liberal Arts&Convergence Studies Honam UniversityGwangju62399Korea

With the popularity of deep learning tools in image decomposition and natural language processing,how to support and store a large number of parameters required by deep learning algorithms has become an urgent problem to be solved.These parameters are huge and can be as many as millions.At present,a feasible direction is to use the sparse representation technique to compress the parameter matrix to achieve the purpose of reducing parameters and reducing the storage pressure.These methods include matrix decomposition and tensor decomposition.To let vector take advance of the compressing performance of matrix decomposition and tensor decomposition,we use reshaping and unfolding to let vector be the input and output of Tensor-Factorized Neural Networks.We analyze how reshaping can get the best compress ratio.According to the relationship between the shape of tensor and the number of parameters,we get a lower bound of the number of parameters.We take some data sets to verify the lower bound.

关键词： Deep neural network parameters compressing matrix decomposition tensor decomposition

韩国低危前列腺癌患者的分级和分期的升高：一项多中心研究

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Asian Journal of Andrology 2015年第5期17卷 811-814,I0009页

作者： Insang Hwang Donghoon lim Young Beom Jeong Seung Chol Park Jun Hwa Noh Dong Deuk Kwon Taek Won Kang Department of Urology Chonnam National University Medical School Gwangju Korea Department of Urology Chosun University Medical School Gwangju Korea Department of Urology Chonbuk National University Medical School Jeonju Korea Department of Urology Wonkwang University School of Medicine Iksan Korea Department of Urology Kwangju Christian Hospital Gwangju Korea

与美国82%的局限性前列腺癌发病率相比，韩国局限性前列腺癌病例仅为54%。此外，在根治性前列腺切除后，半数韩国患者的肿瘤分级提高。我们研究了低危前列腺癌患者在根治性前列腺切除后分级和/或分期升高的危险因素。我们回顾性性分析了... 详细信息

与美国82%的局限性前列腺癌发病率相比，韩国局限性前列腺癌病例仅为54%。此外，在根治性前列腺切除后，半数韩国患者的肿瘤分级提高。我们研究了低危前列腺癌患者在根治性前列腺切除后分级和/或分期升高的危险因素。我们回顾性性分析了honam省5家医院1159例接受根治性前列腺切除的患者的医学记录。收集了术前的标准临床病理学参数，根治性前列腺切除的标本给予分级和分期，我们把“预后不佳”定义为Gleason 评分大于等于7，或病理分期大于等于T3。应用多元回归模型分析评价术后病理分期提高的相关因素。在1159例患者中，324例归类为临床低危组，154例（47.5%）患者既有分级的提高也有分期的提高。多变量分析显示，术前血清前列腺抗原水平（odds ratio [OR], 1.131; 95%confidence interval [CI], 1.007-1.271; P= 0.037）, 穿刺组织的肿瘤阳性百分率（OR： 1.018; 95% CI： 1.002-1.035; P= 0.032）,和小前列腺体积（〈30ml）（OR： 2.280; 95% CI： 1.351-3.848; P=0.002）是不良预后的预测指标。总体讲，47.5%的低危患者术后分期增加。对于我们的研究组，目前的危险度分级标准可能过于宽松。

关键词：前列腺癌前列腺切除术危险因素

Randomized Controlled Pilot Trial of Truncal Exercises after Stroke to Improve Gait and Muscle Activity

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Neuroscience & Medicine 2016年第4期7卷 149-156页

作者： Byoung-Sun Park Ji-Woong Noh Mee-Young Kim lim-Kyu Lee Seung-Min Yang Won-Deok Lee Yong-Sub Shin Ju-Hyun Kim Jeong-Uk Lee Byong-Yong Hwang Junghwan Kim Laboratory of Health Science & Nanophysiotherapy Department of Physical Therapy Graduate School Yongin University Yongin Korea Department of Physical Therapy College of Health Welfare Wonkwang Health Science University Iksan-Si Korea Department of Physical Therapy College of Health Science Honam University Eodeung-Daero Korea Department of Physical Therapy College of Public Health & Welfare Yongin University Yongin Korea

The purpose of the present study was to evaluate the effects of a trunk exercise program on the gait and muscle activity in stroke patients. The participants of this pilot study included six hemiplegic stroke patients. The outcomes were surface electromyography (sEMG) and spatiotemporal gait parameters. In analysis of sEMG, no statistically difference was found between pre- and post-training of Maximal Voluntary Isometric Contraction (MVIC) in rectus abdominis and external abdominal oblique muscle, but it tended to increase. However, the gait parameter significantly increased in walking speed, walking cycle, and affected stride length in stroke patients. These results suggest that the trunk exercise program may in part improve the gait of chronic stroke patients.

关键词： Trunk Exercise Program Surface Electromyography Chronic Stroke Patients

Analysis of Skin Parameters of Korean Men According to the Parts of the Body for Integumentary Physiotherapy Research

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Health 2018年第4期10卷 467-486页

作者： So-Jung Kim Ju-Hyun Kim Jeong-Uk Lee Mee-Young Kim lim-Kyu Lee Byoung-Sun Park Seung-Min Yang Won-Deok Lee Ji-Woong Noh Yong-Sub Shin Doo-Ho Kim Il-Hyun Kim Junghwan Kim Laboratory of Health Science & Nanophysiotherapy Department of Physical Therapy Graduate School Yongin University Yongin South Korea Department of Physical Therapy College of Health Welfare Wonkwang Health Science University Iksan South Korea Department of Physical Therapy College of Health Science Honam University Gwangju South Korea The Team of Safety and Quality Management Yeongwol Combined Cycle Power Plant Division Korea Southern Power Plant Busan South Korea Department of Physical Therapy College of Public Health & Welfare Yongin University Yongin South Korea

Studies have demonstrated that some cutaneous biophysical properties vary with the part of the body. The results to date of skin conditions in human skin of multiple parts of the body have not yet been well established. In this study, we assessed the differences in the skin’s sebum, moisture, pores, wrinkles, pigmentation, and elasticity of each body part in Korean men in their 20s. A total of 34 healthy men were enrolled. A Skin Diagnosis Meter was used to measure the skin’s surface sebum, moisture, pores, wrinkles, pigmentation, and elasticity of each body part. The sebum content was significantly higher on the face than at other sites. Moisture was significantly high on the feet. Pores were significantly high on the face. Wrinkles were significantly high on the face. Pigmentation was high on the face and neck, but not significantly. Elasticity was significantly high on the hands. In the correlation analysis results, sebum and pore were positively correlated, but sebum and moisture and wrinkle and elasticity were negatively correlated. For nearly the first time, this study resulted in systematic reference values for standardized biophysical measuring methods and body parts reflecting the skin physiology of healthy South Korean men. The results show that skin’s surface sebum, moisture, pores, wrinkles, pigmentation, and elasticity vary with the part of the body.

关键词： Sebum Moisture Pores Wrinkles Pigmentation Elasticity Total Body

Characteristic Dermatologic Changes in the Condition of Skin after Ultrasonic Stimulation in Healthy Korean Men

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Journal of Cosmetics, Dermatological Sciences and Applications 2018年第4期8卷 195-206页

作者： So-Jung Kim Seung-Min Yang Ju-Hyun Kim Jeong-Uk Lee Mee-Young Kim lim-Kyu Lee Byoung-Sun Park Won-Deok Lee Ji-Woong Noh Yong-Sub Shin Doo-Ho Kim Il-Hyun Kim Junghwan Kim Laboratory of Health Science & Nanophysiotherapy Department of Physical Therapy Graduate School Yongin University Yongin Republic of Korea Department of Physical Therapy College of Health Welfare Wonkwang Health Science University Iksan Republic of Korea Department of Physical Therapy College of Health Science Honam University Gwangsan-gu Republic of Korea The Team of Safety and Quality Management Yeongwol Combined Cycle Power Plant Division Korea Southern Power Plant Yeongwol-gun Republic of Korea Department of Physical Therapy College of Public Health & Welfare Yongin University Yongin Republic of Korea

The aim of our study was to recognize different skin conditions of the face and neck using six biophysical parameters and to show the changes after the application of ultrasonic stimulation (US). We assessed the differences in the sebum, moisture, pores, wrinkles, pigmentation, and elasticity of the skin in the face and neck regions. A total of 30 healthy men in their 20s were enrolled. We used a skin diagnosis meter to assess the state of the skin. The sebum and pores of the face were more significant than in the neck. The amount of moisture in the U-zone was significantly higher than in other areas. Statistical differences were found between the pre-and post-measure-ment values in the sebum, moisture, wrinkles and pigmentation. Wrinkles and pigmentation were positively correlated. Our data showed that the changes in skin condition are associated with external stimulants. The effect of US on skin may differ depending on the part of the body, and some biophysical properties of skin vary depending on the location on the body.

关键词： Ultrasonic Stimulation Korean Men Skin

Analysis of Interferential Current Therapy-Induced Skin Changes in Healthy Korean Men

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Natural Science 2018年第11期10卷 436-447页

作者： So-Jung Kim Seung-Min Yang Ju-Hyun Kim Jeong-Uk Lee Mee-Young Kim lim-Kyu Lee Byoung-Sun Park Won-Deok Lee Ji-Woong Noh Yong-Sub Shin Doo-Ho Kim Il-Hyun Kim Kong-Sook Noh Junghwan Kim Laboratory of Health Science & Nanophysiotherapy Department of Physical Therapy Graduate School Yongin Uni-versity Yongin-si Republic of Korea Department of Physical Therapy College of Health Welfare Wonkwang Health Science University Iksan-si Republic of Korea Department of Physical Therapy College of Health Science Honam University Gwangju-si Republic of Korea The Team of Safety and Quality Management Yeongwol Combined Cycle Power Plant Division Korea Southern Pow-er Plant Yeongwol-gun Republic of Korea Department of Physical Therapy College of Public Health & Welfare Yongin University Yongin-si Republic of Korea

We examined the changes in numerous skin conditions before and after the ap-plication of interferential current therapy to various regions of healthy male bodies. In this study, we assessed the differences in the skin’s sebum, moisture levels, pores, wrinkles, pigmentation, and elasticity on the shoulders, lower back, and the knees of Korean males in their 20s. A total of 30 healthy males were in-cluded in the study. We used a skin diagnosis meter as a device for measuring the state of the skin. A statistical difference was found when comparing the pre- and post-measurement values in regards to the moisture levels, wrinkles, and pig-mentation. In the correlation analysis results, the sebum and pigmentation, moisture levels and wrinkles, moisture levels and pigmentation, and moisture levels and elasticity were all positively correlated, respectively. The results of this study partially suggest that a change in skin condition is associated with ex-ternal stimulation. The study also found that the effects of the application of in-terferential current therapy on the various skin conditions may differ depending on the region of the body that the application is conducted as well.

关键词： Interferential Current Therapy Korean Men Skin