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نتیجه جستجو - Korea

تعداد مقالات یافته شده: 123
ردیف عنوان نوع
1 Cybersecurity knowledge and skills for port facility security officers of international seaports_ Perspectives of IT and security personnel
دانش و مهارت های امنیتی سایبری برای افسران امنیتی تأسیسات پورت از دریاها بین المللی، دیدگاه های IT و پرسنل امنیتی-2021
Cyberattacks on worldwide port facilities have highlighted the urgent need for port facility security officers (PFSOs) to upgrade their cybersecurity knowledge and skills. This study used the survey data from all international container ports in Thailand and analyzed the results from two perspectives, i.e., IT and security officers. Based on 73 responses, cybersecurity knowledge and skill would become essential for PFSOs than ever before because the port digitalization and automation would shape the PFSOs career to a technically- oriented specialist rather than a multi-skilled generalist. Furthermore, the responsibilities of PFSOs would extend to cover cyber risk management, which enables them to prevent the digital port facilities from emerging cyber threats. Therefore, they should learn how to incorporate the existing risk management process with cyber risk management and cybersecurity knowledge because these would be the foundation for PFSOs to practice cybersecurity skills. At the end of the learning process, PFSOs could also gain cyber- security competence once they have mature knowledge and skill, which would be the vital element of port security hygiene. © 2021 The Authors. Production and hosting by Elsevier B.V. on behalf of The Korean Association of Shipping and Logistics, Inc. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/). CC_BY_NC_ND_4.0
keywords: دانش سایبری | مهارت های سایبری | افسران امنیتی تسهیلات پورت | بنادر کانتینر بین المللی | Cybersecurity knowledge | Cybersecurity skills | Port facility security officers | International container ports
مقاله انگلیسی
2 Design of a fingerprint template protection scheme using elliptical structures
طراحی طرح محافظت از اثر انگشت با استفاده از ساختارهای بیضوی-2021
Although biometric authentication is viewed as more prominent than password or token-based methodology in identity verification, biometric templates are vulnerable to attacks. This paper proposes a new approach for securing fingerprint templates using elliptical structures generated from the fingerprint minutiae. Authors generate a feature vector from the ellipse and will be projected onto a 3D-space to compute a binary string. The resultant binary string is transformed to frequency domain (DFT) and multiplied with a user specific random matrix to make it permanently non-invertible and secure. The results show the efficacy of the proposed method for protecting the fingerprints. c 2021 The Korean Institute of Communications and Information Sciences (KICS). Publishing services by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords: Fingerprint | Ellipse | Discrete Fourier transform | Template protection
مقاله انگلیسی
3 The effects of population aging on South Korea’s economy: The National Transfer Accounts approach
اثرات پیری جمعیت بر اقتصاد کره جنوبی: رویکرد حساب‌های انتقال ملی-2021
This study examines how two factors of population aging, changes in fertility and mortality, will respectively affect South Korea’s economic future. The economic effects of population aging are examined by considering the population in each age group under alternative demographic scenarios. Utilizing recent population projections and South Korea’s National Transfer Accounts, the paper applies a simple decomposition model measuring the respective effects of fertility and mortality on separate aspects of the economy: labor income, private and public consumption, and public and private transfers. The results show that the effects of low fertility and low mortality on the economy are very different in direction, magnitude, timing, and impact by age group. The only effect of an aging population that is the same in all circumstances is the effect on the public pension system: low fertility and mortality will increase pressure on the public pension system of South Korea.
keywords: پیری جمعیت | باروری کم | حساب های ملی انتقال | بحران پیری کره جنوبی | اقتصاد نسل | Population aging | Low fertility | National Transfer Accounts | South Korea’s aging crisis | Generational economy
مقاله انگلیسی
4 Internal and external corporate social responsibility activities and firm value: Evidence from the shared growth in the supply chain
فعالیت های مسئولیت اجتماعی شرکت داخلی و خارجی و ارزش شرکت: شواهدی از رشد مشترک در زنجیره تأمین-2021
Despite the long history of corporate social responsibility (CSR) research, few studies have focused on CSR activities related to business partners in supply chains. In this regard, we investigate whether internal (or backward) CSR enhances firm value. Using an index from the Korea Commission for Corporate Partnership, which indicates whether a firm shares its profits with business partner companies, we find that firm value increases as this backward CSR increases. Further, after controlling for internal CSR, firms engaged only in external CSR have lower firm value than non-CSR firms. Interestingly, we find that firms involved in both internal and external CSR have higher value. Overall, by showing that internal CSR is a core activity that enhances firm value, our study provides policy implications for the regulatory bodies of different countries. Copyright © 2021, Borsa I_stanbul Anonim S¸ irketi. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).JEL classification: M14; M48
Keywords: Internal CSR | External CSR | Firm value | Supply chain | Shared growth
مقاله انگلیسی
5 Organic-waste-derived butyric acid-to-biodiesel supply-chain network: Strategic planning design using a deterministic snapshot model
شبکه زنجیره تامین اسید بوتیریک اسید به بیودیزل مشتق شده از مواد آلی: طراحی برنامه ریزی استراتژیک با استفاده از یک مدل عکس فوری قطعی-2021
An integrated optimization model for an organic-waste-derived butyric acid-to-butanol supply-chain network (BABSCN) is proposed to minimize the total network cost by simultaneously optimizing both strategic biodiesel production and waste management planning decisions. This model is useful for ensuring effective organic-waste provision for large-scale biodiesel production and waste management. The proposed mixed-integer linear-pro- gramming model optimizes the activities ranging from organic-waste preprocessing to butyric acid (BA), transportation of BA to biorefinery, butanol (BuOH) production and mixing with diesel to the distribution of biodiesel. This model is useful for forecasting organic-waste management biodiesel supply chains in South Korea in 2030. The case study results show that a total network cost of $US 3.16/gallon of B3 contains 3% BuOH from organic waste products combined with diesel. The biorefinery-related cost accounts for 98.3% of the total network cost, followed by the organic waste procurement cost (1.1%) and biodiesel distribution cost (0.6%). A scenario-based analysis shows that a 7%-BuOH increase in biodiesel increases the total network cost by 18.8%.
Keywords: Strategic planning | Supply chain | Organic waste | Biodiesel | Optimization | Cost
مقاله انگلیسی
6 Supply chain management of butyric acid-derived butanol: Stochastic approach
مدیریت زنجیره تأمین بوتانول مشتق از اسید بوتیریک: رویکرد تصادفی-2021
In this study, a stochastic model for strategic planning of the butyric acid-to-butanol supply chain network (Ba- to-Bu SCN) is developed to consider variations in the butanol (Bu) demand and butyric acid (Ba) supply derived from industrial/municipal waste. The proposed stochastic model can help determine where and how much Ba to process, Bu to produce, and Ba/Bu to transport to minimize the total cost of the Ba-to-Bu SCN design under Ba processing and Bu demand uncertainties. The features and capabilities of the stochastic model are validated and compared to those of the deterministic model by application of the future Ba-to-Bu SCN design for South Korea in 2030. The optimization results illustrate that the expected total cost of Ba-derived Bu by the stochastic model (US$4898.55 thousand per year) was at least 0.18% more economical that that of the deterministic model (US$4889.72 thousand per year). The goal of this study is to develop a decision making tool for a stochastic strategic problem to improve bio-economy caused by uncertainties. The proposed approach will help balance cost efficiency with stability in the uncertain future biorefinery infrastructure.
Keywords: Strategic planning | Optimization | Organic waste | Stochastic model | Butanol | Supply chain
مقاله انگلیسی
7 Integrative design of the optimal biorefinery and bioethanol supply chain under the water-energy-food-land (WEFL) nexus framework
Integrative design of the optimal biorefinery and bioethanol supply chain under the water-energy-food-land (WEFL) nexus framework-2021
This study presents a comprehensive decision model for the integrative design of a biorefinery for bioethanol production and its supply chain (BPSC) under the water-energy-food-land (WEFL) nexus framework. A new optimization model was developed using a mixed integer linear programming to simultaneously identify the optimal process configuration of a bioethanol production plant and the optimal bioethanol supply network. The objective function of the model is to minimize the total annual cost for establishing and operating the BPSC to meet society’s needs (energy, water and food) under the limited resources and land availabilities, and technology capacity. The proposed model can provide the optimal solutions for design and operation of the BPSC: i) the types, and quantities of feedstocks; ii) types, number, and location of facilities and; iii) regional flows. The capability of the proposed model was validated through the case study of Jeju Island, Korea, with two scenarios: BPSC by cost (COPT) and nexus (NOPT) optimization. As a result, it was identified that the BPSC in NOPT requires higher energy supply cost (8.55 B$) than the COPT (6.44 B$). However, the BPSC in NOPT can satisfy the society demands with relatively smaller consumption of occupied land (2%), fresh water (30%) and primary energy consumption (64%) than that of the COPT, respectively.© 2021 Elsevier Ltd. All rights reserved.
Keywords: Nexus | Optimization | Biofuel | Bioethanol supply chain | Korea
مقاله انگلیسی
8 The relation between growth, energy imports, militarization and current account balance in China, Israel and South Korea
رابطه بین رشد، واردات انرژی، نظامی سازی و تعادل حساب جاری در چین، اسرائیل و کره جنوبی-2021
This paper tested the relation among macroeconomic variables such as economic growth, current account balance, energy imports and non-economic variable as militarization for the selected countries by employing Markov Switching-Bayesian Vector Auto Regressive approach for China, Israel and South Korea. These countries have high rate of export and import of weapons, the current account surplus, and higher rate of energy imports. The results showed that the relation between the selected variables differs in these countries with respect to their energy and weapon import levels. According to MarkovSwitching Bayesian Granger Causality results, if the governments determine the polices in the context of the results of the traditional causality test, it will be impossible to obtain the estimated impacts from the policies. Results determined that Militarization, energy imports, economic growth and current account balance relate to each other for all countries. Energy imports increase in the effect of militarization races and economic growth. The current account of the selected countries are vulnerable to the negative energy shocks and militarization.
keywords: نظامی سازی | تعادل حساب جاری | واردات انرژی | Militarization | Current account balance | Energy imports | MSBVAR | MSBGC
مقاله انگلیسی
9 Innovative behavior motivations among frontline employees: The mediating role of knowledge management
انگیزه های رفتار نوآورانه در میان کارکنان خط مقدم: نقش میانجیگری مدیریت دانش-2021
Labor-intensive industries face challenges when designing innovative, customer-oriented service strategies at the employee level, since service is mainly produced and delivered to customers not by technology or machines but by human resources. In other words, the role of frontline employees is particularly critical in customers’ belief formation of whether a service company is innovative or not. Therefore, this study was conducted to formulate and investigate the psychological process of frontline employees’ innovative behaviors. To achieve the purpose, this study collected data from frontline employees in Seoul and Gyeonggi-do, South Korea. This study contributes to the motivation literature in human resources management by adapting and considering a marketing approach based on three aspects of motivation: global, contextual, and situational. This study also examined whether motivation factors may increase knowledge-management capabilities and subsequently stimulate innovative behaviors, which are critical to the successful implementation of service improvements among frontline employees.
keywords: انگیزه | مدیریت دانش | نوآوری | سرویس | نظریه خود تعیین | Motivation | Knowledge management | Innovation | Service | Self-determination theory
مقاله انگلیسی
10 Accounting for price responses in economic evaluation of climate impacts for a fishery
حسابداری برای پاسخ های قیمت در ارزیابی اقتصادی تاثیرات اقلیمی برای ماهیگیری-2021
The present study evaluates the economic impacts of fluctuations in anchovy (Engraulis spp.) catch in Gyeong- Nam (GN) province, South Korea, arising due to warming seawater, accounting for the effects of the re- sponses of the anchovy price. It combines an inter-regional input-output (IRIO) model of two regions (i.e., GN province and all other provinces combined) with a simultaneous equation system (SES) of anchovy supply and demand functions estimated to make projections of the price and quantity of anchovies based on two greenhouse gas (GHG) concentration scenarios (i.e., representative concentration pathway (RCP) 4.5 and 8.5). Results indicate that estimates of the economic impacts for the two regions will be biased if we consider only the quantity (harvest) change when computing the economic impacts without accounting for the effects of the price re- sponses. None of the previous IO-based economic impact analyses of fisheries account for the price effects induced by a quantity shock. This study fills this critical void by considering such effects.
keywords: تغییرات اقلیمی | ماهیگیری | کره جنوبی | پاسخ قیمت | مدل ورودی-خروجی بین منطقه ای | Climate change | Anchovy fishery | South Korea | Price response | Inter-regional input-output model
مقاله انگلیسی
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