30 research outputs found
Web3: The Next Internet Revolution
Since the first appearance of the World Wide Web, people more rely on the Web
for their cyber social activities. The second phase of World Wide Web, named
Web 2.0, has been extensively attracting worldwide people that participate in
building and enjoying the virtual world. Nowadays, the next internet
revolution: Web3 is going to open new opportunities for traditional social
models. The decentralization property of Web3 is capable of breaking the
monopoly of the internet companies. Moreover, Web3 will lead a paradigm shift
from the Web as a publishing medium to a medium of interaction and
participation. This change will deeply transform the relations among users and
platforms, forces and relations of production, and the global economy.
Therefore, it is necessary that we technically, practically, and more broadly
take an overview of Web3. In this paper, we present a comprehensive survey of
Web3, with a focus on current technologies, challenges, opportunities, and
outlook. This article first introduces several major technologies of Web3.
Then, we illustrate the type of Web3 applications in detail. Blockchain and
smart contracts ensure that decentralized organizations will be less trusted
and more truthful than that centralized organizations. Decentralized finance
will be global, and open with financial inclusiveness for unbanked people. This
paper also discusses the relationship between the Metaverse and Web3, as well
as the differences and similarities between Web 3.0 and Web3. Inspired by the
Maslow's hierarchy of needs theory, we further conduct a novel hierarchy of
needs theory within Web3. Finally, several worthwhile future research
directions of Web3 are discussed.Comment: Preprint. 5 figures, 2 table
Metaverse in Education: Vision, Opportunities, and Challenges
Traditional education has been updated with the development of information
technology in human history. Within big data and cyber-physical systems, the
Metaverse has generated strong interest in various applications (e.g.,
entertainment, business, and cultural travel) over the last decade. As a novel
social work idea, the Metaverse consists of many kinds of technologies, e.g.,
big data, interaction, artificial intelligence, game design, Internet
computing, Internet of Things, and blockchain. It is foreseeable that the usage
of Metaverse will contribute to educational development. However, the
architectures of the Metaverse in education are not yet mature enough. There
are many questions we should address for the Metaverse in education. To this
end, this paper aims to provide a systematic literature review of Metaverse in
education. This paper is a comprehensive survey of the Metaverse in education,
with a focus on current technologies, challenges, opportunities, and future
directions. First, we present a brief overview of the Metaverse in education,
as well as the motivation behind its integration. Then, we survey some
important characteristics for the Metaverse in education, including the
personal teaching environment and the personal learning environment. Next, we
envisage what variations of this combination will bring to education in the
future and discuss their strengths and weaknesses. We also review the
state-of-the-art case studies (including technical companies and educational
institutions) for Metaverse in education. Finally, we point out several
challenges and issues in this promising area.Comment: IEEE BigData 2022. 10 pages, 5 figures, 3 table
Viscous effect on interaction between shock wave and cylindrical bubble: based on the discrete Boltzmann method
The viscous effects on the interaction between a shock wave and a
two-dimensional cylindrical bubble are investigated based on the discrete
Boltzmann method (DBM). Besides some interesting Hydrodynamic Non-Equilibrium
(HNE) behaviors, some relevant Thermodynamic Non-Equilibrium (TNE) behaviors
are carefully studied. It is found that the viscosity contributes little effect
on the dynamic processes in the shock compression stage but significantly
influences them in the post-shock stage. A bubble with a smaller viscosity
coefficient displays a stouter jet structure, can be compressed more easily,
and reaches its minimum characteristic scales slower. The viscosity accelerates
the average motion of the bubble, reduces the vorticity strength (circulation),
and restrains the material mixing between the ambient gas and the bubble. The
viscous effects on different TNE quantities/perspectives show interesting
differences. These differences indicate the complexity of TNE behaviors, which
still requires further understanding. The viscous effects on entropy production
are also investigated. It is found that the entropy production caused by the
non-organized momentum flux (NOMF) is larger than that caused by the
non-organized energy flux (NOEF). As the Prandtl number increases, the entropy
production increases. But the first decreases
and then approaches a saturation value
Revision of the orb-weaver spider genus Gea C.L. Koch, 1843 (Araneae, Araneidae) from China
The orb-weaver spider genus Gea C.L. Koch, 1843 from China is revised, and three species including one new species, are recognized: Gea jingdong Mi, Wang & Gan, sp. nov. (ββ) from Yunnan; Gea spinipes C.L. Koch, 1843 (ββ) from Guangdong, Guangxi, Guizhou, Hainan, Taiwan, and Yunnan; and Gea subarmata Thorell, 1890 (ββ) from Guangxi and Hainan. Gea subarmata is newly recorded in China
A new species of Siamspinops Dankittipakul & Corronca, 2009 from Guizhou, China (Araneae, Selenopidae)
The wall crab spider genus Siamspinops Dankittipakul & Corronca, 2009 contains eight species restricted to South and Southeast Asia, of which two are recorded from China.A new species, Siamspinops yejiei sp. n., is diagnosed and described based on both sexes from Foding Mountain National Nature Reserve, Guizhou, China. Diagnostic photos of the habitus and copulatory organs and a distributional map are provided
Two new species of Lysiteles Simon, 1895 from Cibagou National Nature Reserve, Xizang, China (Araneae, Thomisidae)
Lysiteles Simon, 1895 contains 64 nominal species distributed in East, South and South Asia. It possesses very high species diversity in China (with 46 and 32 endemics), Bhutan (with 9 and 1 endemic) and Nepal (with 8 and 4 endemics).In June 2023, a spider survey of Cibagou National Nature Reserve, Xizang, China was carried out. After examination and morphological comparison, two Lysiteles species were recognised as new to science.Two new species of Lysiteles Simon, 1895 collected from Cibagou National Nature Reserve, Xizang, China are described: L. cibagou sp. nov. (ββ) and L. tangi sp. nov. (ββ). Diagnostic photos of habitus and copulatory organs and a distributional map are provided
ο»ΏSix new species of the orb-weaver spider genus Araneus Clerck, 1757 (Araneae, Araneidae) and a redescription of A. colubrinus Song & Zhu, 1992 from Fanjingshan National Nature Reserve, Guizhou, China
Six new species of the genus Araneus Clerck, 1757 from Fanjingshan National Nature Reserve in Guizhou Province, China are described: Araneus chenjingi sp. nov. (ββ), and A. yuboi sp. nov. (ββ) are assigned to the A. diadematus group; A. lihaiboi sp. nov. (ββ), A. shii sp. nov. (ββ), A. wanghuai sp. nov. (ββ), and A. yangchuandongi sp. nov. (ββ) are assigned to the A. sturmi group. Araneus colubrinus Song & Zhu, 1992 is redescribed. A new synonym of Araneus colubrinus Song & Zhu, 1992 is proposed: Araneus octodentalis Song & Zhu, 1992 syn. nov
A new species of Pancorius Simon, 1902 (Araneae, Salticidae) from Guizhou, China
The jumping spider genus Pancorius Simon, 1902 is represented by 40 species primarily distributed in East, South and Southeast Asia. Amongst these, 10 (including eight endemics) are known from China.A new species, Pancorius lui sp. nov., is diagnosed and described, based on both sexes from Yuntai Mountain in Guizhou of China. Diagnostic photos and a distribution map are provided
Multiauthority Attribute-Based Encryption with Traceable and Dynamic Policy Updating
Ciphertext policy attribute-based encryption (CP-ABE) is an encryption mechanism that can provide fine-grained access control and adequate cloud storage security for Internet of Things (IoTs). In this field, the original CP-ABE scheme usually has only a single trusted authority, which will become a bottleneck in IoTs. In addition, different users may illegally share their private keys to obtain improper benefits. Besides, the data owners also require the flexibility to change their access policy. In this paper, we construct a multiauthority CP-ABE scheme on prime order groups over a large attribute universe. Our scheme can support white-box traceability along with policy updates to solve the abovementioned three problems and, thus, can fix the potential requirements of IoTs. More precisely, the proposed scheme supports multiple authority, white box traceability, large attribute domains, access policy updates, and high expressiveness. We prove that our designed scheme is static secure and traceable secure based on the state-of-the-art security models. Moreover, by theoretical comparison, our scheme has better performance than other schemes. Finally, extensive experimental comparisons show that our proposed algorithm can be better than the baseline algorithms