• Asian review of World Histories
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• v.4 no.2
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• pp.207-229
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• 2016

Apart from its Greco-Roman and Christian connotations, considering its continuous influence in the Byzantine world, the oikoumene should be seen as a geo-political as well as socio-religious concept of networking and unity in popular thought and local narratives. This paper argues that "ecumenical" thought survived after Late Antiquity and through the Byzantine era in the Orthodox transportation infrastructure of people and information. It also provides a review of the circulation of heresiological "labels" in the middle to late Byzantine eras. In the Mediterranean, routes, transportation vehicles, and any media supported intelligent networking in the oikoumene. People in the oikoumene could access foreign teachings or stories from outsiders or "barbarians" of different faiths. Constantinopolitan intellectuals coined and issued labels for heretics, such as the Bogomils, Paulicians, and Massalians, and constructed a narrative of the heretical contamination from the center of the oikoumene. Heresiologists collected the information used in creating these heresy titles from far-flung places in all directions from Constantinople, and then exported the labels, which were spread using the transportation network of the Byzantine oikoumene.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.11
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• pp.4224-4243
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• 2021

Cognitive radio (CR) is a feasible intelligent technology and can be used as an effective solution to spectrum scarcity and underutilization. As the key function of CR, cooperative spectrum sensing (CSS) is able to effectively prevent the harmful interference with primary users (PUs) and identify the available spectrum resources by exploiting the spatial diversity of multiple secondary users (SUs). However, the open nature of the cognitive radio networks (CRNs) framework makes CSS face many security threats, such as, the malicious user (MU) launches Byzantine attack to undermine CRNs. For this aim, we make an in-depth analysis of the motive and purpose from the MU's perspective in the interweave CR system, aiming to provide the future guideline for defense strategies. First, we formulate a dynamic Byzantine attack model by analyzing Byzantine behaviors in the process of CSS. On the basis of this, we further make an investigation on the condition of making the fusion center (FC) blind when the fusion rule is unknown for the MU. Moreover, the throughput and interference to the primary network are taken into consideration to evaluate the impact of Byzantine attack on the interweave CR system, and then analyze the optimal strategy of Byzantine attack when the fusion rule is known. Finally, theoretical proofs and simulation results verify the correctness and effectiveness of analyses about the impact of Byzantine attack strategy on the throughput and interference.

• Journal of the Korean Society of Clothing and Textiles
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• v.11 no.3 s.25
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• pp.1-14
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• 1987

The purpose of this study was to compare with the Persian texile design having an out-standing skill in fertile designs with the Byzantine textile dosing being influenced a lot by Christinity and many Oriental factors including Hellenism. These two textile design have some similarities and differences in their patterns. The results of the study were as follows: Similarities ; 1. The Persian traditional animals, hunting scenes and cavaliers are used as the major subject in both patterns. 2. Decorative designs enclosed circular are used in both patterns. Differences ; 1. The Persian textile designs are based on Zoroasterianism, and their animal designs have the Zoroasterian religious meanings. While the Byzantine designs are affected by the Christianity. In the Byantine textile designs, the mythical subjects from ancient Rome and Greece, and the circus scenes are dominent. 3. The Persian textile designs are combative, momentary, dignifed, and realistic pattern, while the Byzantin textile designs are playful, sketchy, humouristic, and evasive pattern. 4. Vivid color effect was found in the Persian textile patterns: however, more refined and gorgeous color was used by the Byzantine textile patterns. Thus, the Persian and the Byzantine textile patterns have interrelations with each other. In general, the Persian textile patterns have affected a great deal on the Byzantine textine textile patterns. They are essentially corelated with each other, but each of them has its own characteristics.

• Journal of Fashion Business
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• v.8 no.6
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• pp.57-67
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• 2004

The forms of man's costumes in Byzantine Empire were changed according to each composition of costumes. Those forms of costumes had common features of each period when costumes were included. At the same time, however, the fact that differences existed in accordance with a social position including gender, class, occupation, etc. even though in same period were showed. Analytic elements of man's costumes in Byzantine Empire were selected by important factors. This showed the meanings of position and class in that time. The kinds of analytic elements in man's outwear were various but the forms of costumes were not developed because christianity influenced the forms of clothing in the Middle Ages. As the result of synthesis, the main factor of man's costumes was a tunic in Byzantine Empire of the Middle Ages The phases of the times were reflected on the structure of man's costumes in Byzantine Empire. In particular, religious feature was emphasized, and analytic elements of costumes having meanings showed the features of the society at the Middle Ages. For example, a central analytic element of man's costume, an outer garment was a tunic style of H-silhouette that hid the body line. This was influenced by the phases of the times. Namely, the costume stands as a symbol of the times, and also is a cultural sign that reflects phases like politics, economy, religion.

• ETRI Journal
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• v.42 no.6
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• pp.872-885
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• 2020

Distributed consensus requires the consent of more than half of the congress to produce irreversible results, and the performance of the consensus algorithm deteriorates with the increase in the number of nodes. This problem can be addressed by delegating the agreement to a few selected nodes. Since the selected nodes must comply with the Byzantine node ratio criteria required by the algorithm, the result selected by any decentralized node cannot be trusted. However, some trusted nodes monopolize the consensus node selection process, thereby breaking decentralization and causing a trilemma. Therefore, a consensus node selection algorithm is required that can construct a congress that can withstand Byzantine faults with the decentralized method. In this paper, an algorithm based on the Byzantine agreement among decentralized agents to facilitate agreement between decentralization nodes is proposed. It selects a group of random consensus nodes per block by applying the proposed proof of nonce algorithm. By controlling the percentage of Byzantine included in the selected nodes, it solves the trilemma when an arbitrary node selects the consensus nodes.

• Korean Journal of Human Ecology
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• v.15 no.3
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• pp.469-480
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• 2006

Patterns in clothing symbolize some specific meaning that differs across cultures and religions, although patterns have been mostly used to realize human desires to overcome natural hazards in every culture or religion. This research aims to compare animal patterns of Korea (Confucian/Buddhism culture) with those of Byzantine (Christian culture), based upon a research method of literature survey. It is found through the research that both cultures used common patterns, such as dragon, butterfly, bat, honeybee, peacock, fish, and chicken. In the case of dragon patterns, Korea used it to symbolize emperor, dignity, or authority, while Byzantine used it for devil. Bat patterns had different symbolic meanings in both cultures: they mean happiness, longevity, prosperity or many off-springs in Korea while they mean misfortune or unhappiness in Byzantine. On the other hand, the rest of animal patterns, including butterfly, honeybee, peacock, chicken, had quite a similar symbolic meaning. Butterfly means change of life or beginning of new life in Korea, whereas it means resurrection in Byzantine. Honeybee symbolizes diligence, order, and cooperation. Many animal patterns were used in both cultures at the same time. Another difference can be found in terms of the kind of animals; for example, Korea used wild goose, pheasant, giraffe, deer, mandarin duck & turtle, while Byzantine used eagle, snake, pigeon. Of course, each and every animal has its own meaning, mostly positive. Except dragons and bats, both cultures have a similar meaning in most of animal patterns. Generally speaking, Korea used imaginary animals to pray for human happiness, but Byzantine used real animals to pray for resurrections.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.9C
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• pp.855-862
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• 2009

The path key establishment phase in the wireless sensor network is vulnerable to Byzantine attack. Huang and Hedhi proposed a Byzantine resilient multi-key establishment scheme using a systematic RS code, which has shortcomings of exposing a part of message symbols and inefficient transmission. In this paper, we propose a new Byzantine resilient multi-path key establishment scheme in which direct message symbols are not exposed to an adversary and are more efficiently transmitted the RS-encoded symbols to the destination node. In the Proposed scheme, a non-systematic RS code is used to transmit a generated indirect secret key and each encoded symbol is relayed through available paths between two sensor nodes. If enough symbols are collected at the destination node, it is possible to reconstruct the secret message through RS decoding.

• Cross-Cultural Studies
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• v.26
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• pp.43-71
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• 2012

In this article, we recognize the cross-cultural communication between Greece and Spain through El Greco's pictures. The Greeks of Crete kept to their culture and continued to look to the declining Byzantine Empire for spiritual and political guidance. For two centuries after the conquest, the strength of the Byzantine tradition had become the moral and spiritual sustenance of the conquered in Crete. The basic contribution of Cretan intellectuals or artists such as El Greco of the fifteenth and sixteenth centuries was the forging of connecting links between the Hellenism of the old Byzantine East and the rising, youthful Hellenism of the Renaissance West. In this way, Crete served as an important halfway point between East and West. The saint Mary Magdalene was symbol of Christian penitence, which represents the penitential life personified and became widespread during the Counter Reformation, when new emphasis was put on the value of prayer and repentance in the forgiveness of sin. In Spain, the Penitent Magdalene was popular and El Greco painted many versions, which at the first time, were reflected by Tiziano, on the contrary, at the time of Toledo, were recreated by his own style. Although El Greco was converted to Catholic in Spain, his faith in Greek Orthodox Church influenced on his original painting world. El Greco had never painted a picture whose subject treat with the emphasis of identification between Mary Magdalene and Mary, younger sister of Martha.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.249-251
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• 2021

PBFT (Practical Byzantine Fault Tolerant) is a consensus algorithm that guarantees higher processing speed compared to PoW (Proof of Work) and absolute finality that records are not overturned due to the superiority of computing power. However, due to the complexity of the message, there is a limit that the network load increases exponentially as the number of participating nodes increases. PBFT is an important factor in determining the performance of a blockchain network, but studies on evaluation metrics and evaluation technologies are lacking. In this paper, we propose a PBFT evaluation framework that is convenient to change the consensus algorithm to easily evaluate quantitative indicators and improved methods for evaluating PBFT.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.16 no.11
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• pp.3738-3760
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• 2022

Due to increasing spectrum demand for new wireless devices applications, cooperative spectrum sensing (CSS) paradigm is the most promising solution to alleviate the spectrum shortage problem. However, in the interweave cognitive radio (CR) system, the inherent nature of CSS opens a hole to Byzantine attack, thereby resulting in a significant drop of the CSS security and efficiency. In view of this, a weighted differential sequential single symbol (WD3S) algorithm based on MATLAB platform is developed to accurately identify malicious users (MUs) and benefit useful sensing information from their malicious reports in this paper. In order to achieve this, a dynamic Byzantine attack model is proposed to describe malicious behaviors for MUs in an interweave CR system. On the basis of this, a method of data transmission consistency verification is formulated to evaluate the global decision's correctness and update the trust value (TrV) of secondary users (SUs), thereby accurately identifying MUs. Then, we innovatively reuse malicious sensing information from MUs by the weight allocation scheme. In addition, considering a high spectrum usage of primary network, a sequential and differential reporting way based on a single symbol is also proposed in the process of the sensing information submission. Finally, under various Byzantine attack types, we provide in-depth simulations to demonstrate the efficiency and security of the proposed WD3S.