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6. TinyAKE: A More Practicable and Trustable Scheme for Authenticated Key Establishment in WSNs

Author

Sun, Fajun, He, Selena, Zhang, Xiaotong, Shen, Fanfan, Li, Qingan, and He, Yanxiang

Subjects
Computer Science - Cryptography and Security
Abstract

The characteristics of high loss rate, resource constraint, being eager for good security haven't been fully considered in the existing key establishment protocols of wireless sensor networks. Analyzing the key establishing problem from the MAC and physical layers, existing protocols are not practicable enough due to their overlong agreement packets and single round key establishment. To mitigate the impact of these problems, a group of design principles for secure sensor networks has been presented and TinyAKE, an authenticated key transport protocol based on lightweight certificate, is proposed in this paper. The security of TinyAKE are proved with the theory of indistinguishability, meanwhile, the correctness is also proved, the performance is analyzed and compared with the existing similar protocols. Finally TinyAKE is implemented in the TinyOS with TinyECC. Our evaluation shows that TinyAKE is a more practicable and trustable authenticated key establishment protocol than existing protocols. The experimental result shows that the key transport with certificate mechanism is feasible in WSNs. Moreover, the simulation results show that the optimal number of repeated negotiation is one when the secure connectivity rate of TinyAKE is improved by using the repeated key negotiation.

Published
2021

10. DDG-Based Optimization Metrics for Defect Prediction

Author

Chen, Yong, Xu, Chao, He, Jing Selena, Xiao, Sheng, Shen, Fanfan, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Sun, Xingming, editor, Zhang, Xiaorui, editor, and Xia, Zhihua, editor

Published
2022
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20. Solubility and metastable zone width measurement of 2,4-diaminobenzenesulfonic acid in (H2SO4 + H2O) system

Author

Lizhen Chen, Pengbao Lian, Shen Fanfan, Duanlin Cao, and Jianlong Wang

Subjects
Environmental Engineering, Materials science, General Chemical Engineering, Enthalpy, Thermodynamics, Sulfuric acid, General Chemistry, Atmospheric temperature range, Biochemistry, Endothermic process, Gibbs free energy, law.invention, chemistry.chemical_compound, symbols.namesake, chemistry, law, symbols, Crystallization, Solubility, Dissolution
Abstract

The equilibrium solubility of 2,4-diaminobenzenesulfonic acid and super solubility as well as metastable zone width were measured in (H2SO4+ H2O) system by the laser dynamic method at elevate temperature range from 298.15 K to 338.15 K. 2,4-diaminobenzenesulfonic acid solubility dependence on the temperature and solvent composition were correlated by the modified Apelblat equation, (CNIBS)/Redlich-Kister model and Jouyban-Acree model. The correlated results by three correlation models were in good accord with the experimental values according to relative average deviations (RD), root-mean-square deviations (RMSD), and correlation coefficients (R2). The metastable zone width increased with temperature and sulfuric acid content. The dissolution enthalpy, dissolution entropy and the Gibbs energy were calculated from the experimental values, which indicated that dissolution process of the 2,4-diaminobenzenesulfonic acid was endothermic. The solubility and calculation models of 2,4-diaminobenzenesulfonic acid in (sulfuric acid +water) system could provide the basic data to the crystallization and purifying of the 2,4-diaminobenzenesulfonic acid.

Published
2022

31. Nucleophilic substitution reactions of 1-methyl-4,5-dinitroimidazole with aqueous ammonia or sodium azide

Author

Xiao-Jie Guo, Wang Jianlong, Shen Fanfan, Pengbao Lian, and Chen Lizhen

Subjects
Aqueous solution, 010405 organic chemistry, Organic Chemistry, Carbon-13 NMR, 010402 general chemistry, 01 natural sciences, Medicinal chemistry, 0104 chemical sciences, chemistry.chemical_compound, Ammonia, chemistry, Yield (chemistry), Nitro, Nucleophilic substitution, Sodium azide, Amination
Abstract

In this work, 5-amino-1-methyl-4-nitroimidazole was synthesized by amination reaction of 1-methyl-4,5-dinitroimidazole with aqueous ammonia in 95% yield. Meanwhile, one of its isomers, 4-amino-1-methyl-5-nitroimidazole as byproduct was obtained from the filtrate. Furthermore, nucleophilic substitution reaction of 1-methyl-4,5-dinitroimidazole with sodium azide gave 5-azido-1-methyl-4-nitroimidazole in 98% yield. The three compounds were characterized by IR, 1H and 13C NMR spectra, melting points, and elemental analysis. The structure of 4-amino-1-methyl-5-nitroimidazole was further confirmed by single crystal X-ray diffraction. These reactions indicate that the nitro group at position 5 of 1-methyl-4,5-dinitroimidazole is quite unstable, as well as partial substitution of nitro group at position 4 also occured in aqueous ammonia. Only one nitro group of the two is involved in nucleophilic substitution reaction in each case.

Published
2018

34. The crystal structure of 2,3-dimethyl-1,4-dinitrobenzene – a Z′ = 4 structure, C8H8N2O4

Author

Shen Fanfan, Xue Shaomin, and Wang Jianlong

Subjects
Inorganic Chemistry, Crystallography, chemistry.chemical_compound, chemistry, 010405 organic chemistry, Dinitrobenzene, Structure (category theory), General Materials Science, Crystal structure, 010402 general chemistry, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences
Abstract

C8H8N2O4, triclinic, P1̄ (no. 2), a = 9.1093(5) Å, b = 13.2430(8) Å, c = 15.4334(10) Å, α = 106.544(2)°, β = 98.150(2)°, γ = 96.151(2)°, V = 1745.22(18) Å3, Z = 8, R gt(F) = 0.0508, wR ref(F 2) = 0.1141, T = 173(2) K.

Published
2018

35. 旋转平移法平面绝对检测的偏心误差修正

Author

沈帆帆 Shen Fanfan, 田爱玲 Tian Ailing, 王大森 Wang Dasen, 刘丙才 Liu Bingcai, 朱学亮 Zhu Xueliang, and 王红军 Wang Hongjun

Subjects
Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics
Published
2021

36. The crystal structure of 2,6-dimethyl-3,5-dinitrocyclohexa-2,5-diene-1,4-dione, C8H6N2O6

Author

Wang Jianlong, Xue Shaomin, and Shen Fanfan

Subjects
Crystallography, Diene, 010405 organic chemistry, Chemistry, Crystal structure, 010402 general chemistry, Condensed Matter Physics, 01 natural sciences, Medicinal chemistry, 0104 chemical sciences, Inorganic Chemistry, chemistry.chemical_compound, QD901-999, General Materials Science
Abstract

C8H6N2O6, orthorhombic, Pnma (no. 62), a = 6.4261(7) Å, b = 17.080(2) Å, c = 8.5393(10) Å, V = 937.2(2) Å3, Z = 4, R gt(F) = 0.0444, wR ref(F 2) = 0.0977, T = 173(2) K.

Published
2018

37. The crystal structure of 1,2-dimethyl-3,4-dinitrobenzene, C8H8N2O4

Author

Wang Jianlong, Shen Fanfan, and Xue Shaomin

Subjects
Crystallography, 010405 organic chemistry, Chemistry, Dinitrobenzene, Crystal structure, 010402 general chemistry, Condensed Matter Physics, 01 natural sciences, Medicinal chemistry, 0104 chemical sciences, Inorganic Chemistry, chemistry.chemical_compound, QD901-999, General Materials Science
Abstract

C8H8N2O4, monoclinic, P21/c (no. 14), a = 7.8936(7) Å, b = 14.4210(13) Å, c = 16.0109(15) Å, V = 1799.5(3) Å3, Z = 8, R gt(F) = 0.0590, wR ref(F 2) = 0.1293, T = 173(2) K.

Published
2018

38. Crystal structure of 1,2-dimethyl-3,5-dinitrobenzene, C8H8N2O4

Author

Xu Zishuai, Xue Shaomin, Wang Jianlong, and Shen Fanfan

Subjects
Crystallography, Chemistry, Dinitrobenzene, 02 engineering and technology, Crystal structure, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Medicinal chemistry, 0104 chemical sciences, Inorganic Chemistry, chemistry.chemical_compound, QD901-999, General Materials Science, 0210 nano-technology
Abstract

C8H8N2O4, monoclinic, P21/n (no. 14), a = 14.6418(13) Å, b = 3.8852(4) Å, c = 15.7884(15) Å, β = 108.417(3)°, V = 852.14(14) Å3, Z = 4, R gt(F) = 0.0505, wR ref(F 2) = 0.1159, T = 173(2) K.

Published
2018

39. Crystal structure of 3,4-dimethyl-2,6-dinitrophenol, C8H8N2O5

Author

Xue Shaomin, Wang Jianlong, Liu Chuangang, and Shen Fanfan

Subjects
Inorganic Chemistry, Chemistry, Dinitrophenol, General Materials Science, 02 engineering and technology, Crystal structure, 010402 general chemistry, 021001 nanoscience & nanotechnology, 0210 nano-technology, Condensed Matter Physics, 01 natural sciences, Medicinal chemistry, 0104 chemical sciences
Abstract

C8H8N2O5, monoclinic, P21/n (no. 14), a = 10.7951(12) Å, b = 8.1053(9) Å, c = 10.8626(9) Å, β = 100.371(4)°, V = 934.92(17) Å3, Z = 4, R gt(F) = 0.0686, wR ref(F 2) = 0.1382, T = 293(2) K.

Published
2018

46. Ontogenetic development of digestive tract and digestive enzymatic activities in Squaliobarbus curriculus larvae.

Author

Shen, Fanfan, Li, Caijuan, Teng, Teng, Chen, Yining, Guo, Jinqiang, Zhu, Chuankun, and Ling, Qufei

Subjects
*FRESHWATER fishes, *FISH development, *FISH egg hatchability, *FISH larvae, *ALKALINE phosphatase
Abstract

Abstract: Squaliobarbus curriculus is an economically important freshwater fish. The ontogenetic development of the digestive system of S. curriculus larvae was studied histologically and enzymatically from hatching to 30 days posthatching (DPH). Amylase, lipase, alkaline phosphatase and pepsin activities were detected from the hatching stage, indicating that these enzymes were genetically preprogrammed. Marked increases in intestinal amylase, trypsin and alkaline phosphatase activities between 10 and 20 DPH corresponded to feed acquisition and transformation. Larval development in S. curriculus could be divided into three phases: phase I (endotrophic period): 1–3 DPH; phase II (endo‐exotrophic period): 4–5 DPH; and phase III (exclusively exotrophic period): from 6 DPH onward. At hatching, the digestive tract of the larvae was an undifferentiated straight tube. On 3 DPH, the digestive tract differentiated into the mouth cavity, oesophagus and intestine. On 6 DPH, feeding was totally exotrophic and the yolk sac was completely exhausted. During the growth of S. curriculus larvae, the intestinal mucosa formed and the number of goblet cells and microvilli increased, demonstrating maturation of the digestive system. The study about the digestive development of S. curriculus larvae will contribute to better larval‐rearing strategies. [ABSTRACT FROM AUTHOR]

Published
2018
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