Muhammad Muntasir Yakubu^1,2,*, Mohd Fadzil B Hassan^1,3, Kamaluddeen Usman Danyaro¹, Aisha Zahid Junejo⁴, Muhammed Siraj⁵, Saidu Yahaya¹, Shamsuddeen Adamu¹, Kamal Abdulsalam⁶

Computer Systems Science and Engineering, Vol.48, No.6, pp. 1437-1481, 2024, DOI:10.32604/csse.2024.054556 - 22 November 2024

Abstract This study conducts a systematic literature review (SLR) of blockchain consensus mechanisms, an essential protocols that maintain the integrity, reliability, and decentralization of distributed ledger networks. The aim is to comprehensively investigate prominent mechanisms’ security features and vulnerabilities, emphasizing their security considerations, applications, challenges, and future directions. The existing literature offers valuable insights into various consensus mechanisms’ strengths, limitations, and security vulnerabilities and their real-world applications. However, there remains a gap in synthesizing and analyzing this knowledge systematically. Addressing this gap would facilitate a structured approach to understanding consensus mechanisms’ security and vulnerabilities comprehensively. The… More >

Hind Baageel¹, Md Mahfuzur Rahman^1,2,*

CMC-Computers, Materials & Continua, Vol.81, No.1, pp. 1215-1233, 2024, DOI:10.32604/cmc.2024.055908 - 15 October 2024

Abstract The advent of blockchain technology has transformed traditional methods of information exchange, shifting reliance from centralized data centers to decentralized frameworks. While blockchain’s decentralization and security are strengths, traditional consensus mechanisms like Proof of Work (PoW) and Proof of Stake (PoS) face limitations in scalability. PoW achieves decentralization and security but struggles with scalability as transaction volumes grow, while PoS enhances scalability, but risks centralization due to monopolization by high-stake participants. Sharding, a recent advancement in blockchain technology, addresses scalability by partitioning the network into shards that process transactions independently, thereby improving throughput and reducing… More >

Abdelkader Mendas^*, Abdellah Mebrek, Zohra Mekranfar

Revue Internationale de Géomatique, Vol.33, pp. 383-398, 2024, DOI:10.32604/rig.2024.055321 - 25 September 2024

Abstract The main purpose of this work is to propose a methodology that considers the multicriteria and multi-actor aspects for assessing land suitability for agriculture. This involves offering a group spatial decision-making approach. The members of a multidisciplinary team can decide on the relative importance of the criteria and the ranking of alternatives. Each member provides his judgment and contributes in a distinct and identifiable manner to find a compromise solution. Twelve criteria (easily available water reserve, cation exchange capacity, electric conductivity, potential of hydrogen (pH), drainage, permeability, active limestone, soil texture, soil useful depth, slopes,… More >

Xiangyu Wu¹, Xuehui Du^1,*, Qiantao Yang^1,2, Aodi Liu¹, Na Wang¹, Wenjuan Wang¹

CMC-Computers, Materials & Continua, Vol.80, No.1, pp. 1491-1519, 2024, DOI:10.32604/cmc.2024.052708 - 18 July 2024

Abstract Blockchain has been widely used in finance, the Internet of Things (IoT), supply chains, and other scenarios as a revolutionary technology. Consensus protocol plays a vital role in blockchain, which helps all participants to maintain the storage state consistently. However, with the improvement of network environment complexity and system scale, blockchain development is limited by the performance, security, and scalability of the consensus protocol. To address this problem, this paper introduces the collaborative filtering mechanism commonly used in the recommendation system into the Practical Byzantine Fault Tolerance (PBFT) and proposes a Byzantine fault-tolerant (BFT) consensus… More >

Ang Liu¹, Qing Zhang², Shengwei Xu^3,*, Huamin Feng⁴, Xiu-bo Chen⁵, Wen Liu¹

CMC-Computers, Materials & Continua, Vol.80, No.1, pp. 1727-1751, 2024, DOI:10.32604/cmc.2024.051233 - 18 July 2024

Abstract The Internet of Things (IoT) is a network system that connects physical devices through the Internet, allowing them to interact. Nowadays, IoT has become an integral part of our lives, offering convenience and smart functionality. However, the growing number of IoT devices has brought about a corresponding increase in cybersecurity threats, such as device vulnerabilities, data privacy concerns, and network susceptibilities. Integrating blockchain technology with IoT has proven to be a promising approach to enhance IoT security. Nevertheless, the emergence of quantum computing poses a significant challenge to the security of traditional classical cryptography used… More >

Phi-Hung Nguyen^*

CMC-Computers, Materials & Continua, Vol.80, No.1, pp. 1655-1675, 2024, DOI:10.32604/cmc.2024.050713 - 18 July 2024

Abstract This study aims to establish an expert consensus and enhance the efficacy of decision-making processes by integrating Spherical Fuzzy Sets (SFSs) and Z-Numbers (SFZs). A novel group expert consensus technique, the PHI model, is developed to address the inherent limitations of both SFSs and the traditional Delphi technique, particularly in uncertain, complex scenarios. In such contexts, the accuracy of expert knowledge and the confidence in their judgments are pivotal considerations. This study provides the fundamental operational principles and aggregation operators associated with SFSs and Z-numbers, encompassing weighted geometric and arithmetic operators alongside fully developed operators… More >

Lejun Zhang^1,2,3,*, Junjie Zhang¹, Kentaroh Toyoda⁴, Yuan Liu², Jing Qiu², Zhihong Tian², Ran Guo⁵

CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.1, pp. 783-800, 2024, DOI:10.32604/cmes.2023.043469 - 30 December 2023

Abstract Bitcoin is widely used as the most classic electronic currency for various electronic services such as exchanges, gambling, marketplaces, and also scams such as high-yield investment projects. Identifying the services operated by a Bitcoin address can help determine the risk level of that address and build an alert model accordingly. Feature engineering can also be used to flesh out labeled addresses and to analyze the current state of Bitcoin in a small way. In this paper, we address the problem of identifying multiple classes of Bitcoin services, and for the poor classification of individual addresses… More >

Mohanad A. Mohammed^*, Hala B. Abdul Wahab

CMES-Computer Modeling in Engineering & Sciences, Vol.138, No.2, pp. 1731-1748, 2024, DOI:10.32604/cmes.2023.030528 - 17 November 2023

Abstract Blockchain technology has garnered significant attention from global organizations and researchers due to its potential as a solution for centralized system challenges. Concurrently, the Internet of Things (IoT) has revolutionized the Fourth Industrial Revolution by enabling interconnected devices to offer innovative services, ultimately enhancing human lives. This paper presents a new approach utilizing lightweight blockchain technology, effectively reducing the computational burden typically associated with conventional blockchain systems. By integrating this lightweight blockchain with IoT systems, substantial reductions in implementation time and computational complexity can be achieved. Moreover, the paper proposes the utilization of the Okamoto More >

Rongrong Ren^1,2, Luyang Su^1,2, Xinyu Meng^1,2, Jianfang Wang³, Meng Zhao^1,2,4,*

CMES-Computer Modeling in Engineering & Sciences, Vol.138, No.1, pp. 429-458, 2024, DOI:10.32604/cmes.2023.027310 - 22 September 2023

Abstract With the development of big data and social computing, large-scale group decision making (LGDM) is now merging with social networks. Using social network analysis (SNA), this study proposes an LGDM consensus model that considers the trust relationship among decision makers (DMs). In the process of consensus measurement: the social network is constructed according to the social relationship among DMs, and the Louvain method is introduced to classify social networks to form subgroups. In this study, the weights of each decision maker and each subgroup are computed by comprehensive network weights and trust weights. In the… More >

Xuming Mo^1,*, Wei Cai^2,*, Jirong Qi¹, Zhuoming Xu³, Ying Wang⁴, Weihui Yan⁴, Shoujun Li⁵, Nianguo Dong⁶, Xinxin Chen⁷, Jinfen Liu³, Qiang Shu⁸, Jimei Chen⁹, Haibo Zhang³, Hao Zhang¹⁰, Quansheng Xing¹¹, Qi An¹², Xiaofeng Li¹³, Xu Wang¹⁴, Yan He¹⁵, Junwu Su¹⁶, Taibing Fan¹⁷, Teng Ming¹⁸, Weibing Tang¹⁹, Li Hong²⁰, Jinghao Zheng³, Ming Ye²¹, Guocheng Sun²², Yiqun Ding²³, Liang Tao²⁴, Yifeng Yang²⁵, Zhongshi Wu²⁵, Hua Cao²⁶, Qiang Wang¹⁶, Keming Yang⁵, Libing Zhang²⁷, Ping Wen²⁸, Yanqin Cui²⁹, Bo Zhai³⁰, Yong Zou¹⁸, Qingya Tang³¹, Rui Chen¹¹, Chun Wu³², Zhiyu Feng³³, Caixia Liu³⁴, Yaping Mi²¹, Rufang Zhang³⁵, Ke Lin¹², Xin Li³⁶, Mingan Pi³⁷, Xiangming Fan⁸, Shanshan Shi³⁸, Peng Huang³⁹, Zhengxia Pan³², Jiafeng Qi⁴⁰, Renwei Chen⁴¹, Shuguang Tao⁴², Yaqin Shu¹, Huifeng Zhang²¹, Lan Jiang¹, Min Da¹, Nishant Patel¹, Liang Hu¹, Cardiac Surgery Group of Pediatric Surgery Society of Chinese Medical Association, Parenteral Enteral Nutrition Society of Chinese Medical Association

Congenital Heart Disease, Vol.18, No.6, pp. 571-593, 2023, DOI:10.32604/chd.2024.048939 - 19 January 2024

Abstract The second edition of the expert consensus on pediatric nutrition was formed based on a global update of pediatric nutrition guidelines or consensus worldwide, the management of congenital heart disease, and the results of multi-center clinical nutrition research for congenital heart disease following the first Chinese consensus edition of 2016. The consensus was also shaped by the results of three discussion sessions and two questionnaires conducted by the 13-member collaboration group. This process was informed by both clinical guidelines and expert consensus. The quality of literature, both in English and Chinese, and the level of More >