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Exploring the relationship between rarity and price of profile picture NFT: A formal concept analysis on the BAYC NFT collection

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BLockCHAIN-RESEARCH AND APPLICATIONS 2024年第2期5卷 140-150页

作者： Lee, Heejung Lee, Geun-cheol Koo, Hoon-young Hanyang Univ Sch Interdisciplinary Ind Studies 222 Wangsimni Ro Seoul 04763 South Korea Konkuk Univ Coll Business Adm 120 Neungdong Ro Seoul 05029 South Korea Chungnam Natl Univ Sch Business 99 Daehak Ro Daejeon 34134 South Korea

Non-fungible token (NFT) is a digital asset whose ownership can be validated and controlled via blockchain technology. The NFT market is a rapidly growing field, and the rarity of NFT is an essential factor that affects its price, as scarcity leads to higher demand. This study focuses on the BAYC NFT collection, which is a successful and representative collection of profile picture NFT, and analyzes how rarity affects NFT prices. This paper investigates the relationship between the rarity and price of the BAYC NFT collection using formal concept analysis (FCA) method. The results show that rarity is a major factor influencing the price of NFT and the effect is more apparent in the medium rarity range. When rarity is very high or very low, other factors become significant determinants, such as the uniqueness and appeal of NFT, and even the naturalness of NFT images. This research highlights the importance of considering rarity when assessing NFT and underscores the need for a comprehensive evaluation of NFT rarity. This study also provides valuable insights into the NFT market and can be useful for NFT investors, creators, and collectors. Furthermore, the usefulness of FCA as a tool for quantifying NFT rarity and evaluating NFT price was demonstrated.

关键词： NFT valuation Formal concept analysis Rarity

Anomaly Detection Using Data Rate of Change on Medical Data

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Computers, Materials & Continua 2024年第9期80卷 3903-3916页

作者： Kwang-cheol Rim young-Min Yoon Sung-Uk Kim Jeong-In Kim AI Convergence Research Institute Chosun UniversityGwangju61452Republic of Korea Interdisciplinary Program of Architectural Studies Chonnam UniversityGwangju61186Republic of Korea AINTCHAIN SOFT Co. Ltd.Mokpo-si58750Republic of Korea BK21 Human Resources Development Project Group Chosun UniversityGwangju61452Republic of Korea

The identification and mitigation of anomaly data,characterized by deviations from normal patterns or singularities,stand as critical endeavors in modern technological landscapes,spanning domains such as Non-Fungible Tokens(NFTs),cyber-security,and the burgeoning *** paper presents a novel proposal aimed at refining anomaly detection methodologies,with a particular focus on continuous data *** essence of the proposed approach lies in analyzing the rate of change within such data streams,leveraging this dynamic aspect to discern anomalies with heightened precision and *** empirical evaluation,our method demonstrates a marked improvement over existing techniques,showcasing more nuanced and sophisticated result ***,we envision a trajectory of continuous research and development,wherein iterative refinement and supplementation will tailor our approach to various anomaly detection scenarios,ensuring adaptability and robustness in real-world applications.

关键词： Anomaly data anomaly detection medical anomaly data cyber security rate of change

Chemical and mechanical properties of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys): A review

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Journal of Magnesium and Alloys 2024年第3期12卷 841-872页

作者： Jong Un Lee Hyun Ji Kim Sang-cheol Jin Ye Jin Kim young Min Kim Bong Sun You Jun Ho Bae Sung Hyuk Park Advanced Metals Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea Department of Materials Science and Metallurgical Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Missile Research Institute Agency for Defense DevelopmentDaejeon 34060Republic of Korea

This review article provides overall understanding of stainless,environment-friendly,and nonflammable Mg alloys(SEN alloys)recently developed at the Korea Institute of Materials *** alloys are produced by adding small amounts of Ca and Y(each<1 wt%)into commercial Mg–Al based alloys,resulting in exceptional ignition and corrosion resistances and impressive mechanical *** main advantages of SEN alloys are as follows.(1)A dense multi-oxide layer of SEN alloys comprising MgO,CaO,and Y_(2)O_(3) impedes the outward dispersion of Mg vapor and the inward penetration of O_(2) during oxidation,thereby enhancing the oxidation and ignition resistances.(2)The presence of Ca-and Y-based second-phase particles in SEN alloys can enhance their corrosion resistance because Ca-containing particles prevent the spread of corrosion,and the replacement of Al-containing particles with less noble ones containing Y(e.g.,Al–Mn–Y or Al–Y particles)retards corrosion.(3)The addition of minor amounts of Ca and Y renders excellent mechanical properties due to improved strengthening *** enhanced properties are attributed to more pronounced dynamic recrystallization and grain refining behaviors caused by the second-phase particles during extrusion.(4)Despite the presence of various types of second-phase particles,the fatigue properties of SEN9 alloys are similar to those of commercial AZ91 alloys.(5)Simultaneous introduction of Ca and Y suppresses the formation of Mg17Al12 discontinuous precipitates during aging,leading to the enhanced elongation of aged SEN alloys.(6)Adding mischmetal into the SEN9 alloy leads to a six-fold enhancement in ***,the studies conducted on SEN alloys demonstrate their excellent ignition and corrosion resistances and mechanical properties,which broaden the industrial applications of Mg alloys by addressing their inherent weaknesses.

关键词： SEN magnesium alloy Corrosion resistance Ignition resistance Mechanical properties Extrudability.

数字化趋势下物流企业资源整合能力对服务效率的影响

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商业经济 2024年第2期 81-83,139页

作者：孙晓维 young Seok ock 釜庆大学技术经营专门大学院韩国釜山48547

随着数字化趋势的兴起,物流企业面临着资源整合的挑战,数字化趋势下物流企业资源整合能力对服务效率存在重要影响。数字化趋势下,物流企业的资源整合能力对服务效率的影响路径主要包括技术平台整合、数据整合与分析、人力资源整合以及... 详细信息

随着数字化趋势的兴起,物流企业面临着资源整合的挑战,数字化趋势下物流企业资源整合能力对服务效率存在重要影响。数字化趋势下,物流企业的资源整合能力对服务效率的影响路径主要包括技术平台整合、数据整合与分析、人力资源整合以及流程优化与创新,这些路径的有效整合和应用将有助于提升物流企业的服务效率,满足客户的需求并保持竞争优势,因此物流企业可以通过强化内部技术平台整合、优化数据整合与分析、做好人力资源整合、推进流程优化与创新来提升资源整合能力,以此促进服务效率提升。

关键词：数字化趋势资源整合能力服务效率物流企业

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Optimal sequential therapy using tyrosine kinase inhibitors as the first-line treatment in patients with metastatic renal cell carcinoma: A nationwide multicenter study

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Asian Journal of Urology 2024年第3期11卷 450-459页

作者： Jung Ki Jo Seong Il Seo MinYong Kang Jinsoo Chung cheol Kwak Sung-Hoo Hong Cheryn Song Jae young Park Chang Wook Jeong Seok Hwan Choi Sung Han Kim Eu Chang Hwang Chan Ho Lee Hakmin Lee Department of Urology Medical and Digital EngineeringCollege of MedicineHanyang UniversitySeoulRepublic of Korea Department of Urology Samsung Medical CenterSungkyunkwan University School of MedicineSeoulRepublic of Korea Department of Urology National Cancer CenterGoyangRepublic of Korea Department of Urology Seoul National University HospitalSeoulRepublic of Korea Department of Urology Kangnam St Mary’s HospitalSeoulRepublic of Korea Department of Urology Asan Medical CenterSeoulRepublic of Korea Department of Urology Korea University Ansan HospitalAnsanRepublic of Korea Department of Urology Kyungpook National University HospitalDaeguRepublic of Korea Department of Urology Chonnam National University Hwasun HospitalHwasunRepublic of Korea Department of Urology Inje University Busan Paik HospitalBusanRepublic of Korea Department of Urology Seoul National University Bundang HospitalSeongnamRepublic of Korea

Objective:The purpose of the study was to identify the best sequence of therapy beginning with a tyrosine kinase inhibitor(TKI)as the first-line therapy for patients with metastatic renal cell carcinoma(mRCC)in terms of overall survival(OS),progression-free survival(PFS),and rates of discontinuation and adverse effects during the treatment ***:This is a retrospective,nationwide multicenter study of patients with mRCC after diagnosis at 10 different tertiary medical centers in Korea from January 1992 to December *** focused on patients at either“favorable”or“intermediate”risk according to the International mRCC Database Consortium criteria,and they were followed up(median 335 days).Finally,a total of 1409 patients were selected as the study *** generated a Cox proportional hazard model adjusted for covariates,and the different therapy schemes were statistically tested in terms of OS as well as *** addition,frequencies of discontinuation and adverse events were compared among the therapy ***:Of the primary patterns of treatment sequences(24 sequences),“sunitinib epazopanib”and“sunitinibeeverolimuseimmunotherapy”showed the most beneficial results in both OS and PFS with significantly lower hazards than“sunitinib”,which is the most commonly treated agent in *** that the“TKIeTKI”structure showed relatively higher discontinuation rates with higher adverse effects,the overall beneficial sequence would be“sunitinibeeverolimuseimmunotherapy”.Conclusion:Among several sequential therapy starting with TKIs,“sunitinibeeverolimuse immunotherapy”was found to be the best scheme for mRCC patients with“favorable”or“intermediate”risks.

关键词： Tyrosinekinase inhibitor Metastaticrenalcell carcinoma Overall survival Progression-free survival

国际直接投资与高新技术企业自主创新关系的实证分析

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工业技术经济 2024年第7期43卷 131-138页

作者：丛识吴灏文玉英硕釜庆大学技术经营专门大学院韩国釜山48547 大连理工大学经济管理学院大连116086

为充分发挥国际直接投资对高新技术企业自主创新的促进作用,本文以2010~2022年的电子及通信设备制造业面板数据为基础,就国际直接投资与高新技术企业自主创新的关系进行实证研究。通过选取自变量、因变量、控制变量、门限变量,进行描述... 详细信息

为充分发挥国际直接投资对高新技术企业自主创新的促进作用,本文以2010~2022年的电子及通信设备制造业面板数据为基础,就国际直接投资与高新技术企业自主创新的关系进行实证研究。通过选取自变量、因变量、控制变量、门限变量,进行描述性统计、回归分析、稳健性检验和内生性检验,分析因变量和自变量之间的关系。结果表明:电子及通信设备制造业自主创新存在明显差异,其中,技术投入资金反向抑制其自主创新,而国际直接投资、研发人力资本、研发人员报酬、企业规模、国家研发补贴、市场经营状况、对外开放水平正向促进其自主创新;电子及通信设备制造业与技术投入资金之间存在一对协整关系,与国际直接投资、研发人力资本、企业规模、研发人员报酬、国家研发补贴、市场经营状况、对外开放水平均存在两对协整关系,且均在1%显著性水平下显著相关;国际直接投资可正向促进电子及通信设备制造业自主创新,并随着研发人力资本门限值的增大,促进作用表现为先下降后上升的特点;将研发人力资本的门限值设定为小于11.364,可更好发挥国际直接投资对电子及通信设备制造业的自主创新促进作用。基于实证结果得出,要进一步发挥国际直接投资对高新技术企业自主创新的促进作用,需要从改善投资环境、引进研发人员、加大投入资金、营造自主创新氛围、加强行业对外开放、开展良性行业竞争等对策入手。

关键词：国际直接投资高新技术企业电子及通信设备制造业自主创新协整关系门限效应研发人力资本企业规模

基于人工智能与大数据技术视角的企业组织变革策略研究

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企业改革与管理 2024年第15期 64-66页

作者：丛识玉英硕釜庆大学技术经营专门大学院韩国釜山48547

当前,数字化转型已经不仅是一种技术变革,而且是涉及企业全面重塑业务模式、运营流程乃至企业文化变革的过程。面对外部环境的快速变化,特别是市场不确定性因素的增加和消费者行为的日益多元化,这就要求企业必须具备高度的灵活性与快速... 详细信息

当前,数字化转型已经不仅是一种技术变革,而且是涉及企业全面重塑业务模式、运营流程乃至企业文化变革的过程。面对外部环境的快速变化,特别是市场不确定性因素的增加和消费者行为的日益多元化,这就要求企业必须具备高度的灵活性与快速的响应能力。同时,来自内部对于提升运营效率、激发创新能力的迫切需求,也促使企业不得不重新审视既有架构与流程,寻求通过数字化转型突破发展瓶颈。因此,构建一个能够适应数字化时代的组织形态,并培育一种以数据为驱动的企业文化,成为企业维持和提高综合竞争力的重要手段。基于此,本文深入探讨了基于人工智能与大数字技术视角的企业组织变革策略,以期为数字化转型中的企业组织变革提供可资参考的策略与路径。

关键词：数字化转型企业组织变革人工智能大数据

Landscapes of SARS-CoV-2-reactive CD8^(+)T cells:heterogeneity of host immune responses against SARS-CoV-2

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Signal Transduction and Targeted Therapy 2021年第5期6卷 1399-1401页

作者： June-young Koh Eui-cheol Shin Graduate School of Medical Science and Engineering Korea Advanced Institute of Science and Technology(KAIST)DaejeonRepublic of Korea The Center for Epidemic Preparedness KAISTDaejeonRepublic of Korea

In a recent study published in Science Immunology,^Kusnadi et *** single-cell RNA sequencing(scRNA-seq)of SARS-CoV-2-reactive CD8^(+)T cells and reported ***-CoV-2 infection causes COVID-19,which is an ongoing pandemic disease threatening public *** virology of SARS-CoV-2 and immune responses against the virus have been urgently investigated to develop effective measures against *** viral infection,CD84 T cells contribute to elimination of the virus by exerting cytotoxicity against virus-infected cells and producing effector cytokines,whereas neutralizing antibodies interfere with viral entry of host cells.

关键词： al. infection Immunology

Obturator hernia-a rare etiology of lateral thigh pain:A case report

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World Journal of Clinical Cases 2021年第34期9卷 10728-10732页

作者： Jun young Kim Min cheol Chang Department of Physical Medicine and Rehabilitation College of MedicineYeungnam UniversityTaegu 705-717South Korea

BACKGROUND Lateral thigh pain is a common complaint in patients visiting a pain ***,we describe the case of a patient with lateral thigh pain caused by an obturator *** SUMMARY An 83-year-old woman visited the emergency room with suddenly aggravated right lateral thigh *** resonance imaging of the thigh revealed no abnormal findings in the lateral thigh ***,an obturator hernia between the pectineus and obturator externus muscles was observed by *** computed tomography revealed a herniated small bowel with an incarceration point at the right obturator canal and a dilated loop of the small bowel *** of the right inguinal region revealed a distended bowel loop in the right pectineus *** Our report provides clinicians with information that an obturator hernia can cause lateral thigh pain.

关键词： Obturator hernia Pain Magnetic resonance image Computed tomography Ultrasonography Case report