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Transparent Supercapacitors: From Optical Theories to Optoelectronics Applications

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Energy & Environmental Materials 2020年第3期3卷 265-285页

作者： Sang-woo kim Sang-Young Lee Department of Energy Engineering School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 689-798Korea

The ever-increasing demand for smart optoelectronics spurs the relentless pursuit of transparent wireless devices as a game-changing technology that can provide unseen visual information behind the *** enable successful operation of the transparent wireless devices,their power sources should be highly transparent in addition to acquiring reliable electrochemical *** various transparent power sources,supercapacitors(SCs)have been extensively investigated as a promising candidate due to their exceptional cyclability,power capability,material diversity,and scalable/low-cost ***,we describe current status and challenges of transparent SCs,with a focus on their core materials,performance advancements,and integration with application devices.A special attention is devoted to transparent conductive electrodes(TCEs)which act as a keyenabling component in the transparent *** on fundamental understanding of optical theories and operating principles of transparent materials,we comprehensively discuss materials chemistry,structural design,and fabrication techniques of *** addition,noteworthy progresses of transparent SCs are briefly overviewed in terms of their architectural design,opto-electrochemical performance,flexibility,form factors,and integration compatibility with transparent flexible/wearable devices of ***,development direction and outlook of transparent SCs are explored along with their viable roles in future application fields.

关键词： energy storage flexibility optoelectronics transparent conductive electrodes transparent supercapacitors

Role of milk carbohydrates in intestinal health of nursery pigs: a review

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Journal of Animal Science and Biotechnology 2022年第3期13卷 628-641页

作者： Ki Beom Jang Sung woo kim Department of Animal Science North Carolina State UniversityRaleighNC 27695USA

Intestinal health is essential for the resistance to enteric diseases and for nutrient digestion and absorption to support *** intestine of nursery pigs are immature and vulnerable to external challenges,which cause negative impacts on the structure and function of the *** nutritional interventions,the benefits of milk are significant for the intestinal health of *** coproducts have traditionally been used in starter feeds to improve the growth of nursery pigs,but their use is somewhat limited due to the high costs and potential risks of excessive lactose on the ***,understanding a proper feeding level of milk carbohydrates is an important start of the feeding *** nursery pigs,lactose is considered a highly digestible energy source compared with plant-based starch,whereas milk oligosaccharides are considered bioactive compounds modulating intestinal immunity and ***,milk carbohydrates,mainly composed of lactose and oligosaccharides,have essential roles in the intestinal development and functions of nursery *** proper feeding levels of lactose in starter feeds could be variable by weaning age,body weight,or genetic *** of lactose and milk oligosaccharides have been broadly studied in human health and animal ***,this review focuses on the mechanisms of lactose and milk oligosaccharides affecting intestinal maturation and functions through modulation of enterocyte proliferation,intestinal immunity,and intestinal microbiota of nursery pigs.

关键词： Intestinal health Lactose Milk carbohydrates Milk oligosaccharides Nursery pig

Tailoring of Mechanical Properties of Indirect Hot Stamping Steel Tubes by Laser Assisted Local Rapid Heating

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Journal of Iron and Steel Research International 2016年第9期23卷 949-954页

作者： Mahmudun Nabi CHOWDHURY Ju-ri kim Sung-tae HONG jin-wook JUNG Heung-nam HAN Sang-woo SO Schoolof Mechanical Engineering University of Ulsan Ulsan44610 South Korea Department of Materials Science & Engineering and Centre for Iron & Steel Research RIAM Seoul National University Seoul 08826 South Korea Automotive Parts Institute & Centre Ulsan Technopark Ulsan 44412 South Korea

The effect of laser assisted local heating on the mechanical properties of a hot stamping steel tube was in vestigated. A heated region with a spiral shape was generated on the surface of the tube by combining the linear movement of the laser and the rotation of the tube. The results of axial crush tests show that the laser assisted local heating can be effectively used to modify the mechanical performance of the tube. A microstructural analysis confirms that the laser locally induces a martensitic phase transformation in the heated region and results in inhomogeneous microstructures alon- the length of the tube.

关键词： local heating laser hot stamping steel tube

日粮营养对母猪生产性能的影响及对所产仔猪生产性能的潜在积极效应

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国外畜牧学(猪与禽) 2025年第01期 1-11页

作者：冯占雨潘雪男 Alexa Gormley Ki Beom Jang Yesid Garavito-Duarte Zixiao Deng Sung woo kim

鉴于当前的饲喂方案在支持现代母猪繁殖性能的快速遗传改良方面存在局限性，本综述的目的在于识别现代母猪所面临的营养挑战，并提出可能的解决方案，从而缓解与近期遗传改良相关的母体组织过度损失和繁殖失败。自2012年以来，母猪分娩... 详细信息

鉴于当前的饲喂方案在支持现代母猪繁殖性能的快速遗传改良方面存在局限性，本综述的目的在于识别现代母猪所面临的营养挑战，并提出可能的解决方案，从而缓解与近期遗传改良相关的母体组织过度损失和繁殖失败。自2012年以来，母猪分娩时的窝产仔数增加了2.26头，仔猪初生重增加了0.22kg，这提高了母猪在妊娠期和哺乳期的营养需要量。本综述生成的预测模型显示，与当前饲喂方案相比，现代母猪在妊娠期需要额外补充赖氨酸。另一方面，本综述还讨论了现代母猪所面临的生理挑战。高氧化应激、盆腔器官脱垂和跛行不仅会直接影响母猪的繁殖性能，还会对初乳和常乳的品质造成负面影响。因此，人们对研究特定生物活性化合物作为饲料添加剂的作用，以减轻这些挑战的负面影响越来越有兴趣。其中，硒源、儿茶素和特定植物提取物已被用于减轻母猪的氧化应激，氯化钙和植酸酶已被用于缓解盆腔器官脱垂和跛行，藻类和酵母的提取物已被用于改善初乳和常乳的品质，纤维源和益生菌已普遍被用于改善肠道健康。总体而言，本综述阐述了现代母猪饲喂方案所面临的独特挑战，并指出了通过修正母猪氨基酸需要量以及使用特定生物活性化合物提高其繁殖性能的方法。

关键词：生物活性化合物营养需要营养调控氧化应激高产母猪母猪生产力

DISCRETE MINUS ONE NORM LEAST-SQUARES FOR THE STRESS FORMULATION OF LINEAR ELASTICITY WITH NUMERICAL RESULTS

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Journal of Computational Mathematics 2003年第6期21卷 689-702页

作者： Sang Dong kim Byeong Chun Shin Seokchan kim Gyungsoo woo Department of Mathematics Kyungpook National University Taegu 702-701 KoreaDepartment of Mathematics Chonnam National University Kwangju 500-757 KoreaDepartment of Mathematics Changwon Nationnal University Changwon 641-773 KoreaDepartment of Mathematics Changwon Nationnal University Changwon 641-773 Korea

This paper studies the discrete minus one norm least-squares methods for the stress formulation of pure displacement linear elasticity in two dimensions. The proposed least-squares functional is defined as the sum of the L2- and H-1-norms of the residual equations weighted appropriately. The minus one norm in the functional is replaced by the discrete minus one norm and then the discrete minus one norm least-squares methods are analyzed with various numerical results focusing on the finite element accuracy and multigrid convergence performances.

关键词： H-1 least-squares Linear elasticity Multigrid method.

Effect of ammonia gas etching on growth of vertically aligned carbon nanotubes/nanofibers

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Transactions of Nonferrous Metals Society of China 2011年第A1期21卷 130-134页

作者： Sang-Gook kim Sooh-Yung kim Hyung-woo LEE Department of Mechanical Engineering Massachusetts Institute of Technology 77 Massachusetts Ave Cambridge MA 02139 USA National Core Research Center for Hybrid Materials Solution Pusan National University

The etching effect of ammonia （NH3） on the growth of vertically aligned nanotubes/nanofibers （CNTs） was investigated by direct-current plasma enhanced chemical vapor deposition （DC-PECVD）. NH3 gas etches Ni catalyst layer to form nanoscale islands while NH3 plasma etches the deposited amorphous carbon. Based on the etching effect of NH3 gas on Ni catalyst, the differences of growing bundles of CNTs and single strand CNTs were discussed; specifically, the amount of optimal NH3 gas etching is different between bundles of CNTs and single strand CNTs. In contrast to the CNT carpet growth, the single strand CNT growth requires shorter etching time （5 min） than large catalytic patterns （10 rain） since nano dots already form catalyst islands for CNT growth. Through removing the plasma pretreatment process, the damage from being exposed at high temperature substrate occurring during the plasma generation time is minimized. High resolution transmission electron microscopy （HTEM） shows fishbone structure of CNTs grown by PECVD.

关键词： carbon nanotube ammonia etching nickel catalyst plasma enhanced chemical vapor deposition (PECVD)

Replica higher-order topology of Hofstadter butterflies in twisted bilayer graphene

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npj Computational Materials 2023年第1期9卷 783-791页

作者： Sun-woo kim Sunam Jeon Moon Jip Park Youngkuk kim Department of Physics KAISTDaejeonRepublic of Korea Department of Materials Science and Metallurgy University of CambridgeCambridgeUK Department of Energy Science Sungkyunkwan UniversitySuwonRepublic of Korea Center for Theoretical Physics of Complex Systems Institute for Basic Science(IBS)DaejeonRepublic of Korea Department of Physics Hanyang UniversitySeoulRepublic of Korea Department of Physics Sungkyunkwan UniversitySuwonRepublic of Korea

The Hofstadter energy spectrum of twisted bilayer graphene(TBG)is found to have recursive higher-order topological *** demonstrate that higher-order topological insulator(HOTI)phases,characterized by localized corner states,occur as replicas of the original HOTIs to fulfill the self-similarity of the Hofstadter *** show the existence of exact flux translational symmetry in TBG at all commensurate *** on this result,we identify that the original HOTI phase at zero flux is re-entrant at a half-flux periodicity,where the effective twofold rotation is *** addition,numerous replicas of the original HOTIs are found for fluxes without protecting *** the original HOTIs,replica HOTIs feature both localized corner states and edge-localized real-space topological *** replica HOTIs originate from the different interaction scales,namely,intralayer and interlayer couplings,in *** topological aspect of Hofstadter butterflies revealed in our results highlights symmetry-protected topology in quantum fractals.

关键词： properties spectrum topological

Mending the broken in amyotrophic lateral sclerosis: DNA damage and repair in motor neuron degeneration

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Neural Regeneration Research 2021年第1期16卷 104-105页

作者： Byung woo kim Lee J.Martin Department of Pathology Division of Neuropathologythe Pathobiology Graduate Training ProgramJohns Hopkins University School of MedicineBaltimoreMDUSA Department of Neuroscience Johns Hopkins University School of MedicineBaltimoreMDUSA

Amyotrophic lateral sclerosis(ALS)is a fatal neurodegenerative disease that causes paralysis and respiratory failure(Petrov et al.,2017).The driving mechanisms are unknown,and there are no effective treatments(Petrov et al.,2017).Aging and a few gene mutations,a common one being missense mutations in superoxide dismutase-1(SOD1),are risk factors for ALS(Figure 1).The recent Food and Drug Administration approval of edaravone for the treatment of ALS putatively supports a role for oxidative and nitrative stresses in the disease processes(Figure 1A).DNA damage,abnormalities in DNA repair,and other nuclear abnormalities are implicated also in the pathogenesis of human ALS(Bradley and Krasin,1982;kim et al.,2020).

关键词： al. damage degeneration

3D designed battery-free wireless origami pressure sensor

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Microsystems & Nanoengineering 2022年第6期8卷 35-46页

作者： Taeil kim Amirhossein Hassanpoor Kalhori Tae-Ho kim Chao Bao woo Soo kim Additive Manufacturing Laboratory School of Mechatronic Systems EngineeringSimon Fraser UniversitySurrey V3T 0A3 BCCanada

A pressure monitoring structure is a very useful element for a wearable device for health monitoring and sports *** pressure sensors have been studied extensively,battery-free functions working in wireless detection have not been studied ***,we report a 3D-structured origami-based architecture sensor for wireless pressure *** developed an architectured platform for wireless pressure sensing through inductorcapacitor(LC)sensors and a monopole antenna.A personalized smart insole with Miura-ori origami designs has been 3D printed together with conductive 3D printed sensors *** monitoring of resonant frequency and intensity changes of LC sensors have been demonstrated to monitor foot pressure for different *** sensitivity of the wireless pressure sensor is tunable from 15.7 to 2.1 MHz/kPa in the pressure ranges from 0 to 9 kPa and from 10 to 40 kPa,*** proposed wireless pressure-sensing platform can be utilized for various applications such as orthotics,prosthetics,and sports gear.

关键词： battery free utilized