bluuebunny/crossref_metadata_2025 huggingface dataset:
Time dependent reduced density matrix functional theory at strong correlation: insights from a two-site Anderson impurity model
Authors: Di Sabatino Stefano , Verdozzi Claudio , Romaniello Pina
Published: July 2021

An approximate two-body density matrix, which governs the time evolution of the one-body density matrix, quickly pushes it out of its N-representability domain.
Large Rashba splitting, carrier mobility, and valley polarization in a 1T-SnS2/MoTe2 heterostructure
Authors: Teng Sukai , Li Jia , Mao Xiujuan , He Fuli , Liu Ze , Wang Jiaxi , Wang Yafan
Published: July 2021

The 1T-SnS2/MoTe2 heterostructure is analyzed using ab initio calculations. This hybrid system shows large Rashba spin splitting, a high carrier mobility and valleytronic characteristics.
Mapping the role of aromatic amino acids within a blue-light sensing LOV domain
Authors: Ding Yonghong , Zhao Ziyue , Matysik Jörg , Gärtner Wolfgang , Losi Aba
Published: July 2021

In blue-light sensing LOV domains tryptophans and tyrosines near the flavin chromophore dramatically influence the triplet state decay, the efficiency of singlet oxygen production and the yield of the photoproduct.
Correction: A first-principles study of the stability, electronic structure, and optical properties of halide double perovskite Rb2Sn1−xTexI6 for solar cell applications
Authors: Faizan Muhammad , Xie Jiahao , Murtaza Ghulam , Echeverría-Arrondo Carlos , Alshahrani Thamraa , Bhamu Kailash Chandra , Laref Amel , Mora-Seró Iván , Khan Shah Haidar
Published: July 2021

Correction for ‘A first-principles study of the stability, electronic structure, and optical properties of halide double perovskite Rb2Sn1−xTexI6 for solar cell applications’ by Muhammad Faizan et al., Phys. Chem. Chem. Phys., 2021, 23, 4646–4657, DOI: 10.1039/D0CP05827K.
Deciphering structure and aggregation in asphaltenes: hypothesis-driven design and development of synthetic model compounds
Authors: Scott David E. , Schulze Matthias , Stryker Jeffrey M. , Tykwinski Rik R.
Published: July 2021

This review describes the design and synthesis of compounds that are functionalized to mimic the physical and chemical behavior of asphaltenes. The constructive interplay between synthetic compounds and modern analytical techniques is highlighted.
Pt-Embedded-Co3O4 hollow structure as a highly efficient catalyst for toluene combustion
Authors: Li Lei , Wei Meijie , Chen Feng , Ji Weijie
Published: July 2021

Pt embedded Co3O4 hollow structure nanocomposites (Pt@Co3O4) were facilely prepared through metal–organic frameworks (MOFs) sacrificial strategy. Compared with Pt/Co3O4 and bare Co3O4 catalyst, it shows excellent toluene combustion performance.
Photocatalytic hydroxylation of benzene to phenol over organosilane-functionalized FeVO4 nanorods
Authors: Wei Danlei , Huang Lianqi , Liang Hanying , Zou Junhua , Chen Wenwen , Yang Can , Hou Yidong , Zheng Dandan , Zhang Jinshui
Published: July 2021

Surface silylation of FeVO4 with organosilane functional groups is a promising strategy to realize kinetic control of photocatalytic benzene hydroxylation reactions.
Insights into the sintering resistance of RuO2/TiO2–SiO2 in the Deacon process: role of SiO2
Authors: Liu Yupei , Li Siyao , Lu Xinqing , Ma Rui , Fu Yanghe , Wang Shuhua , Zhou Liyang , Zhu Weidong
Published: July 2021

RuO2 nanoparticles are still formed on the surface of TiO2 to prevent the thermal sintering because of the geometric effects of SiO2 and the resultant RuO2/TiO2–SiO2 catalyst has an improved stability in the Deacon process.
From centrosymmetric to noncentrosymmetric: effect of the cation on the crystal structures and birefringence values of (NH4)n−2AE(PO2F2)n (AE = Mg, Sr and Ba; n = 2, 3 and 4)
Authors: Zhang Wenyao , Jin Wenqi , Cheng Meng , Zhang Ruonan , Yang Zhihua , Pan Shilie
Published: July 2021

Four alkaline-earth metal difluorophosphates with different space groups were synthesized for the first time. The differences in arrangements of the (PO2F2) units lead to disparate optical anisotropy of the crystals.
Trends in computational molecular catalyst design
Authors: Soyemi Ademola , Szilvási Tibor
Published: July 2021

This perspective article summarizes current computational approaches used in molecular catalyst design, highlights their main advantages and limitations as well as the opportunities for automation and advanced machine learning algorithms.
Vanadium, niobium and tantalum complexes with terminal sulfur radical ligands
Authors: Wei Rui , Hu Jingwen , Chen Xiuting , Gong Yu
Published: July 2021

Vanadium, niobium and tantalum complexes with terminal sulfur radical ligands were prepared from the reactions of metal atoms and SOF2 in cryogenic matrixes while the less stable MF2(η2-SO) complexes with side-on SO ligands were not observed.
Iridium-catalyzed highly chemoselective and efficient reduction of nitroalkenes to nitroalkanes in water
Authors: Xu Dong , Chen Yang , Liu Changmeng , Xu Jiaxi , Yang Zhanhui
Published: July 2021

An iridium-catalysed highly chemoselective and efficient transfer hydrogenation of nitroalkenes to nitroalkanes in water was achieved.
Molten salt synthesis of nitrogen doped carbon nanoparticles for enhanced type-I photodynamic therapy
Authors: Tian Yanan , Huang Yuxin , Huang Xiaoyu , Su Zhi , Wang Fu
Published: July 2021

CN NPs were used as an efficient type-I photosensitizer for photodynamic therapy.
Guanidinoneomycin-maleimide molecular transporter: synthesis, chemistry and cellular uptake
Authors: Hadidi Kaivin , Bellucci Maria Cristina , Dall'Angelo Sergio , Leeson-Payne Alasdair , Rochford Justin J. , Esko Jeffery D. , Tor Yitzhak , Volonterio Alessandro
Published: July 2021

Guanidinoneomycin-maleimide is a stable, easy to handle molecular transporter which allows for thiol-maleimide bioconjugation and promotes cellular uptake of high molecular weight cargos at low nanomolar concentrations.
Characterisation of a hyperthermophilic transketolase from Thermotoga maritima DSM3109 as a biocatalyst for 7-keto-octuronic acid synthesis
Authors: Cárdenas-Fernández Max , Subrizi Fabiana , Dobrijevic Dragana , Hailes Helen C. , Ward John M.
Published: July 2021

Hyperthermophilic and thermostable transketolase from Thermotoga maritima (TKtmar) catalysed the efficient conversion of d-galacturonic acid into 7-keto-octuronic acid.
Base-induced multi-state fluorescence of a trefoil-shaped salicylaldehyde azine derivative
Authors: Taniguchi Noriho , Naito Masaya , Miyagawa Shinobu , Tokunaga Yuji
Published: July 2021

Base-induced four-state fluorescence is demonstrated in a trefoil-shaped salicylaldehyde azine derivative bearing multiple acidic protons.
Green synthesis and characterization of gold nanoparticles and their application for the rapid detection of glycyrrhizin with immunochromatographic strips
Authors: Feng Dan-Ni , Fang A-She , Zhang Tie-Ying , Ma Ming-Ze , Xu Zhi-Hua , Sun Yi-Xiao , Zhang Meng-Ting , Shi Feng
Published: July 2021

Glycyrrhizin-reduced and stabilized gold nanoparticles were used for a rapid method of detecting glycyrrhizin content.
Green chemical and biological synthesis of cadaverine: recent development and challenges
Authors: Huang Yuhong , Ji Xiuling , Ma Zhanling , Łężyk Mateusz , Xue Yaju , Zhao Hai
Published: July 2021

Progress and strategies towards the green chemo/bio-synthesis of cadaverine with special attention to their environmental, economic, and applicable impact are reviewed.
Construction of a mixed ligand MOF as “green catalyst” for the photocatalytic degradation of organic dye in aqueous media
Authors: Alamgir  , Talha Khalid , Wang Ying-Jie , Ullah Raza , Wang Bin , Wang Lu , Wu Wei , Chen Sha , Xie Lin-Hua , Li Jian-Rong
Published: July 2021

A new metal–organic framework named BUT-206 has been successfully synthesized, which shows a high photocatalytic activity toward the degradation of crystal violet without using any photosensitizer or cocatalyst under UV-irradiation.
Influence of amphiphilic molecules on the peroxidase-like behavior of nanoparticles in an aqueous solution
Authors: Yin Tianxiang , Zhou Xingnan , Shi Jing
Published: July 2021

The results presented herein provided much deeper understanding of the application of peroxidase-like carbon dots in solutions containing amphiphilic molecules.
Influence of carbohydrate polymer shaping on organic dye adsorption by a metal–organic framework in water
Authors: Tanimoto Yutaro , Noro Shin-ichiro
Published: July 2021

A thorough analysis and comparison was conducted of the Orange II and Rhodamine B dye adsorption properties of unshaped MIL-100(Fe) (MIL) particles and alginate polymer-shaped MIL beads (MIL-alg).
Enhancing the reinforcing efficiency in CNT nanocomposites via the development of pyrene-based active dispersants
Authors: Yin Xinyi , Li Qiang , Wang Haishui , Yang Wengang , Zhou Xi , Zhang Han , Lyu Weibang
Published: July 2021

The active dispersant Py-PEI remarkably enhanced the dispersing stability of CNTs in water and the mechanical performance of BP/epoxy composites.
Alteration of intramolecular electronic transition via deboronation of carbazole-based o-carboranyl compound and intriguing ‘turn-on’ emissive variation
Authors: Lee Seok Ho , Mun Min Sik , Kim Mingi , Lee Ji Hye , Hwang Hyonseok , Lee Wonchul , Lee Kang Mun
Published: July 2021

Deboronation of a 9-methyl-9H-carbazole–based closo-o-carboranyl compound to the nido-o-carborane in an aqueous solution results in a ratiometric turn-on response in the deep-blue emission region with moderate reactivity.
Highly sensitive detection of nitrobenzene by a series of fluorescent 2D zinc(ii) metal–organic frameworks with a flexible triangular ligand
Authors: Yang Xue , Ren Yixia , Chai Hongmei , Hou Xiufang , Wang Zhixiang , Wang Jijiang
Published: July 2021

Four fluorescent 2D Zn-MOFs based on a flexible triangular ligand and linear N-donor ligands are hydrothermally prepared and used to detect nitrobenzene in aqueous solution with high sensitivity, demonstrating their potential as fluorescent sensors.
Luminescence method for detection of aflatoxin B1 using ATP-releasing nucleotides
Authors: Hu Dongyue , Xiao Shusen , Guo Qiaqia , Yue Rongrong , Geng Demin , Ji Debin
Published: July 2021

Schematic illustration of a luminescence short DNA sequence detection method using ATP-releasing nucleotides. Combined with AFB1 aptamer, this method is used to detect AFB1.
Electrospinning preparation and anti-infrared radiation performance of silica/titanium dioxide composite nanofiber membrane
Authors: Song Yilong , Zhao Fang , Li Zhizun , Cheng Zhaogang , Huang Hongjun , Yang Mifen
Published: July 2021

The silica/titanium dioxide composite fiber membrane is prepared by electrospinning. Based on the shielding effect of rutile titanium dioxide on infrared rays, the fiber membrane has lower infrared transmittance and thermal conductivity.
[(3-Nitro-1H-1,2,4-triazol-1-yl)-NNO-azoxy]furazans: energetic materials containing an N(O)N–N fragment
Authors: Gulyaev Dmitry A. , Klenov Michael S. , Churakov Aleksandr M. , Strelenko Yurii A. , Fedyanin Ivan V. , Lempert David B. , Kosareva Ekaterina K. , Kon'kova Tatiana S. , Matyushin Yurii N. , Tartakovsky Vladimir A.
Published: July 2021

A novel class of energetic compounds with a N(O) N–N fragment, [(3-nitro-1H-1,2,4-triazol-1-yl)-NNO-azoxy]furazans, which exhibit good thermal stability and high experimental enthalpies of formation are estimated as possible components of solid composite propellants.
Construction of a lysosome-targetable ratiometric fluorescent probe for H2O2tracing and imaging in living cells and an inflamed model
Authors: Zhou Rongrong , Peng Qiyao , Wan Dan , Yu Chao , Zhang Yuan , Hou Yi , Luo Quan , Li Xiong , Zhang Shuihan , Xie Lin , Ou Pinghua , Peng Yongbo
Published: July 2021

Hydrogen peroxide (H2O2), an important reactive oxygen species (ROS) with unique destructive oxidation properties, can be produced in lysosomes to fight off pathogens.
Indolylbenzothiadiazoles as highly tunable fluorophores for imaging lipid droplet accumulation in astrocytes and glioblastoma cells
Authors: Colas Kilian , Holmberg Karl O. , Chiang Linus , Doloczki Susanne , Swartling Fredrik J. , Dyrager Christine
Published: July 2021

We present an extensive photophysical study of a series of fluorescent indolylbenzothiadiazole derivatives and their ability to specifically image lipid droplets in astrocytes and glioblastoma cells.
Protonation and anion-binding properties of aromatic sulfonylurea derivatives
Authors: Barišić D. , Cindro N. , Vidović N. , Bregović N. , Tomišić V.
Published: July 2021

Sulfonylurea derivatives were studied as receptors revealing that they effectively bind anions of low basicity, whereas basic anions cause receptor deprotonation.
Lightweight wearable thermoelectric cooler with rationally designed flexible heatsink consisting of phase-change material/graphite/silicone elastomer
Authors: Choi Jaeyoo , Dun Chaochao , Forsythe Carlos , Gordon Madeleine P. , Urban Jeffrey J.
Published: July 2021

We propose a wearable thermoelectric cooler and heatsink based of silicone elastomer, phase-change material, and graphite powder, which can achieve a cooling temperature of ∼5 K at 0.5 W input power for more than 5 h under ambient conditions.
High thermal conductivity states and enhanced figure of merit in aligned polymer thermoelectric materials
Authors: Degousée Thibault , Untilova Viktoriia , Vijayakumar Vishnu , Xu Xinzhao , Sun Yiwei , Palma Matteo , Brinkmann Martin , Biniek Laure , Fenwick Oliver
Published: July 2021

Control of morphology and chain alignment in polymer thermoelectric materials is critical to their performance. A x25 improvement in zT is reported for chain aligned films.
Innovative salt-blocking technologies of photothermal materials in solar-driven interfacial desalination
Authors: Nawaz Fahad , Yang Yawei , Zhao Shihan , Sheng Minhao , Pan Cheng , Que Wenxiu
Published: July 2021

Recent advanced salt-blocking technologies for solar-driven interfacial desalination systems have been summarized.
Defining sulfonation limits of poly(ether-ether-ketone) for energy-efficient dehumidification
Authors: Akhtar Faheem Hassan , Abdulhamid Mahmoud A. , Vovusha Hakkim , Ng Kim Choon , Schwingenschlögl Udo , Szekely Gyorgy
Published: July 2021

Unprecedented water vapor uptake of 320% was demonstrated with SPEEK at an unexpectedly low degree of sulfonation of 19% due to the high S–S distance.
Constructing adjacent phosphine oxide ligands confined in mesoporous Zr-MOFs for uranium capture from acidic medium
Authors: Zhang Wen , Dong Xiuting , Mu Yingxin , Wang Yuxin , Chen Jing
Published: July 2021

Adjacent phosphine oxide ligands confined in the mesoporous Zr-MOFs could coordinate with one uranyl ion collaboratively in strong acidic solutions.
Over 17.5% efficiency ternary organic solar cells with enhanced photon utilization via a medium band gap non-fullerene acceptor
Authors: Cao Congcong , Lai Hanjian , Chen Hui , Zhu Yulin , Pu Mingrui , Zheng Nan , He Feng
Published: July 2021

Two medium band gap NFAs are prepared and their PL emission mostly overlaps with the absorption spectrum of Y6. The photoexcitation from acceptors increases significantly due to the energy transfer. The crystallinity and morphlogy of the blend film are also optimized significantly.
Two birds with one stone: a NIR fluorescent probe for mitochondrial protein imaging and its application in photodynamic therapy
Authors: Qi Ya-Lin , Guo Long , Chen Li-Li , Yuan Dan-Dan , Wang Hai-Rong , Cao Yu-Yao , Yang Yu-Shun , Zhu Hai-Liang
Published: July 2021

A near-infrared fluorescence probe was developed to illuminate the dynamic changes in mitochondrial proteins in live cells under oxidative stress, with excellent temporal and spatial resolution.
Construction of a magnetic covalent organic framework with synergistic affinity strategy for enhanced glycopeptide enrichment
Authors: Luo Bin , Li Guohao , Li Zhiyu , He Jia , Zhou Juan , Wu Lijuan , Lan Fang , Wu Yao
Published: July 2021

Construction of a magnetic covalent organic framework with a synergistic affinity strategy for enhanced glycopeptide enrichment.
Detection of cell-surface sialic acids and photodynamic eradication of cancer cells using dye-modified polydopamine-coated gold nanobipyramids
Authors: Cao Yue , Han Shenghua , Zhang Han , Wang Jie , Jiang Qiao-Yan , Zhou Yimin , Yu You-Jia , Wang Jianfang , Chen Feng , Ng Dennis K. P.
Published: July 2021

A novel nanoprobe based on gold nanobipyramids has been fabricated that can detect sialic acids on the surface of cancer cells with ultrahigh sensitivity and kill the cells through sialic acid-mediated photodynamic therapy.
Gyroid-structured Au–Ag periodic bimetal materials for ultrasensitive SERS detection
Authors: Zhang Shuqian , Wu Liping , Wang Wanlin , Zhang Wang , Gu Jiajun , Liu Qinglei , Zhang Di
Published: July 2021

A gyroid-structured Au–Ag bimetal plasmonic material GSPMMs@Au demonstrates ultrasensitive SERS detection performance due to plasmonic coupling between the Au–Ag interface and gyroid structure with high-density hotspots.
Multicomponent reaction-based discovery of pyrimido[2,1-b][1,3]benzothiazole (PBT) as a novel core for full-color-tunable AIEgens
Authors: Gong Shan-Shan , Kong Rui , Zheng Chunhong , Fan Congbin , Wang Chengjun , Yang Dong-Zhao , Chen Zhen-Zhen , Duo Shuwang , Pu Shouzhi , Sun Qi
Published: July 2021

With the aid of multicomponent reaction (MCR), pyrimido[2,1-b][1,3]benzothiazole (PBT) was identified as a novel core structure for full-color-tunable AIEgens with unique working mechanism.
The intramolecular allostery of GRB2 governing its interaction with SOS1 is modulated by phosphotyrosine ligands
Authors: Kazemein Jasemi Neda S. , Herrmann Christian , Magdalena Estirado Eva , Gremer Lothar , Willbold Dieter , Brunsveld Luc , Dvorsky Radovan , Ahmadian Mohammad R.
Published: July 2021

Growth factor receptor-bound protein 2 (GRB2) is a trivalent adaptor protein and a key element in signal transduction. It interacts via its flanking nSH3 and cSH3 domains with the proline-rich domain (PRD) of the RAS activator SOS1 and via its central SH2 domain with phosphorylated tyrosine residues of receptor tyrosine kinases (RTKs; e.g. HER2). The elucidation of structural organization and mechanistic insights into GRB2 interactions, however, remain challenging due to their inherent ﬂexibility. This study represents an important advance in our mechanistic understanding of how GRB2 links RTKs to SOS1. Accordingly, it can be proposed that (1) HER2 pYP-bound SH2 potentiates GRB2 SH3 domain interactions with SOS1 (an allosteric mechanism); (2) the SH2 domain blocks cSH3, enabling nSH3 to bind SOS1 first before cSH3 follows (an avidity-based mechanism); and (3) the allosteric behavior of cSH3 to other domains appears to be unidirectional, although there is an allosteric effect between the SH2 and SH3 domains.
Clinicopathological and prognostic significance of LINC00673 in human malignancy: a review and meta-analysis
Authors: Zhu Yurong , Zhang Zhifa , Peng Hui , Li Weiping , Hu Shaowei , Zhao Min , Lin Weifeng
Published: July 2021

Background: We conducted this research to investigate the relationship between long intergenic non-protein coding RNA 673 (linc00673) expression and prognosis and clinicopathological parameters in human malignancies.

Methods: The PubMed, Embase, WOS, and CNKI databases were used to collect eligible research data before 4 January 2021. Meta-analysis was performed using Stata 12.0 software. Pooled odds ratios (ORs) or hazard ratios (HRs) and their 95% confidence interval (CIs) were calculated to evaluate the association of linc00673 expression with survival outcomes and clinical parameters.

Results: We finally included 17 articles and a total of 1539 cases for the meta-analysis. The results indicated that linc00673 was significantly correlated with T stage (P=0.006), tumor stage (P<0.001), lymph node metastasis (P<0.001), and distant metastasis (P<0.001). In addition, the results suggested that elevated linc00673 expression predicted a poor overall survival (OS) time (P=0.013) and acted as an independent prognostic factor (P<0.001) for OS in patients with malignancy. Although potential evidence of publication bias was found in the studies on OS in relation to tumor stage in the multivariate analysis, the trim-and-fill analysis confirmed that the results remained stable.

Conclusions: Overexpression of linc00673 was significantly correlated with shorter OS time in patients with malignant tumors. Moreover, the increased expression level of linc00673 was significantly correlated with T stage, tumor stage, lymph node metastasis, and distant metastasis. The results presented in this article revealed that linc00673 might be involved in the progression and invasion of malignancy and serve as a novel prognostic biomarker and potential therapeutic target for malignancy.
The OBELISK simulation: Galaxies contribute more than AGN to H I reionization of protoclusters
Authors: Trebitsch Maxime , Dubois Yohan , Volonteri Marta , Pfister Hugo , Cadiou Corentin , Katz Harley , Rosdahl Joakim , Kimm Taysun , Pichon Christophe , Beckmann Ricarda S. , Devriendt Julien , Slyz Adrianne
Published: July 2021

We present the OBELISK project, a cosmological radiation-hydrodynamics simulation that follows the assembly and reionization of a protocluster progenitor during the first two billion years after the big bang, down to z = 3.5. The simulation resolves haloes down to the atomic cooling limit and tracks the contribution of different sources of ionization: stars, active galactic nuclei, and collisions. The OBELISK project is specifically designed to study the coevolution of high-redshift galaxies and quasars in an environment favouring black hole growth. In this paper, we establish the relative contribution of these two sources of radiation to reionization and their respective role in establishing and maintaining the high-redshift ionizing background. Our volume is typical of an overdense region of the Universe and displays star formation rate and black hole accretion rate densities similar to those of high-redshift protoclusters. We find that hydrogen reionization happens inside-out, is completed by z ∼ 6 in our overdensity, and is predominantly driven by galaxies, while accreting black holes only play a role at z ∼ 4.
Influence of constitutive model on soil structure interface interaction under axisymmetric condition
Authors: Xu Binbin
Published: July 2021

This paper mainly studies the performance of axisymmetric radial interaction between soil and structure under radial stress. One of the key points is the research on the mechanical properties of the interface. The latter is now the frontier field, and also the focus of this paper's theoretical analysis. Based on FEM, a large-scale international finite element software, this paper attempts to establish a general comprehensive model with comparative function through the advantages of numerical simulation. After obtaining the results, the analysis focuses on the influence of different materials on the interaction, and summarizes the stress field, strain field, displacement field and stress-strain relationship of the model under different materials.
Analysis of the Influence of Water-cement Ratio on Concrete Strength
Authors: Li Wei
Published: July 2021

In this paper, the main strength of the relationship between water-cement ratio and concrete, and it uses the contrast test of different water cement ratio, finally, it gets the regular change between water cement ratio and concrete strength. The test results show that: cement. when the ratio of large stone: small stone: water: admixture is 340: 618: 1009: 433: 139: 6.8, the water-cement ratio of concrete is within the range of 0.371-0.479. The concrete strength of the sample decreases with the increase of the water-cement ratio. Finally, the relationship between the concrete strength and the water-cement ratio is obtained by fitting.
Review on research of water saving for natural ventilation cooling tower
Authors: Ran Shuyuan
Published: July 2021

Thermal power plant is one of the eight high water consumption industries in China, and circulating cooling water is the largest water consumption project. Under the increasingly severe situation of water resources in China, measures must be taken to reduce the evaporation loss, wind blowing loss and pollution discharge loss of natural ventilation cooling tower. Based on the comprehensive summary of water-saving technology of natural ventilation cooling tower, we compared the advantages and disadvantages of various technologies to provide a basis for water-saving transformation of cooling tower.
Influence of Land Use and Land Cover Change on Land surface temperature
Authors: Sun Jing , He Jing
Published: July 2021

The rapid urbanization process has recently led to significant land use and land cover (LULC) changes, thereby affecting the climate and the environment. The purpose of this study is to analyze the LULC changes in Hefei City, Anhui Province, and their relationship with land surface temperature (LST). To achieve this goal, multitemporal Landsat data were used to monitor the LULC and LST between 2005 and 2015. The study also used correlation analysis to analyze the relationship between LST, LULC, and other spectral indices (NDVI, NDBI, and NDWI). The results show that the built-up land has expanded significantly, transforming from 488.26 km2in 2005 to 575.64 km2in 2015. It further shows that the mean LST in Hefei city has increased from 284.0 K in 2005 to 285.86 K in 2015. The results also indicate that there is a positive correlation between LST and NDVI and NDBI, while there is a negative correlation between LST and NDWI. This means that urban expansion and reduced water bodies will lead to an increase in LST.
Design Analysis of 110kV Double Circuit Narrow-Base Steel Pipe Tower
Authors: Xin Ye , Lin Yinhe , Guo Jingfeng , Fu Xiaoxu , Xie Ming
Published: July 2021

Secondary bending moment and geometric nonlinearity should be taken into account in pipe tower design. Taking the 110kV double-circuit narrow-base steel pipe tower as an example, the 110 kV double-circuit narrow-base steel pipe tower is compared and analyzed through the tower structure design software and the general finite element software ANSYS. The analysis results show that the narrow-base steel tube tower should adopt a rigid-truss structure model, and the influence of the secondary bending moment of the main material and the geometric nonlinearity should be considered. The secondary bending moment effect accounts for about 10-20% of the strength stress of the steel pipe main material. Through comparative analysis, a number of design points are summarized, which provides a certain practical guiding significance for the design and application of the double-circuit narrow-base steel pipe tower.
Application of Three-dimensional Design Software in Transmission Lines
Authors: Nie Kejian , Yu Xinming , Chen Yuanhao , Lin Yinhe , Ye Xin , Xie Ming
Published: July 2021

The digitization of power grid projects is a development requirement in the era of big data, as well as an inevitable requirement for the State Grid Corporation of China to build digital power grids and improve life-cycle management. Three-dimensional design establishes three-dimensional models of ground conductors, insulators, and fittings through line electrical majors, and completes line poles and towers in a three-dimensional scene; line structure majors should establish iron tower models and basic models; survey majors should conduct topography and landforms and ground objects to complete three-dimensional scene construction. It can make the circuit design results more intuitive, reduce the drawing work of repeated components, and improve the design efficiency.
Influence of front slope gradient and the angle between tunnel and slope on stability of tunnel portal
Authors: Wu Huaan , Jin Huahui
Published: July 2021

Shallow buried and unsymmetrically loaded tunnel is the most common type of mountain tunnel portal. Currently, most of the studies mainly focus on the stability of side slope, while the investigation on the deformation of the front slope after tunnel excavation is relatively less. In this paper, the influence of front slope gradient and the angle between tunnel and slope on stability of tunnel portal was analyzed by FLAC3D. The results show that: When the front slope angle is greater than 40°, the slope deformation caused by tunnel excavation is larger with the increase of slope angle. In order to ensure the safety of construction, we should not only pay attention to the treatment of the front slope before the tunnel excavation, but also pay attention to the monitoring of the front slope deformation during the excavation of the tunnel portal section. And the most suitable entry angle between tunnel axis and the front slope is 0°, which can control the vertical displacement of relatively large deformation. The research conclusions can provide some reference for the excavation and support design of mountain tunnel portal.
Research on Road Traffic Network Design Model and Algorithm Considering Traffic Fairness
Authors: Zhao SiWen
Published: July 2021

Urban transportation is an important part of urban economic structure, which plays an important role in promoting the orderly development of society, residents' work and life. This paper analyzes the fairness in traffic network design problem, constructs the average network improvement index to measure fairness, and establishes a bi-level programming model for road traffic network design considering traffic fairness. The upper model includes the optimal total travel time and traffic fairness, and the lower model is the traffic flow allocation model. Then, according to the characteristics of the model, a genetic algorithm is designed to solve the model. Finally, a simple example is given to illustrate the effectiveness of the mathematical model and algorithm. The model proposed in this paper can get the final road design scheme satisfying the total travel time and traffic fairness of the road network under certain road network conditions, and can provide decision support for traffic planners.
Study on the connection mode of comprehensive hub based on urban traffic network
Authors: Kun Tian
Published: July 2021

Since the 21st century, with the rapid development of various modes of transportation, the network integrated transportation hub planning is undergoing new changes. Comprehensive hub is not only an important carrier to connect multiple transportation modes, but also reflects the overall transportation efficiency and service level of different transportation modes. How to improve the passenger flow organization efficiency of urban comprehensive transportation hub is of great practical significance. Based on the proportion of traffic hub functional areas as the breakthrough point, relying on a comprehensive traffic hub in Binhai New Area of Tianjin, this paper aims to optimize the weight relationship among the functional areas of the comprehensive traffic hub, allocate the location and spatial sequence relationship of each functional area based on the weight relationship, and discuss the problem of improving the passenger flow organization efficiency of the comprehensive traffic hub and the corresponding measures. The research results show that intercity station buildings have high proportion and large scale in the comprehensive hub, and should be arranged in an important central position.
Research on the Perception of Historical District of Eight Great Passes in Qingdao Based on Online Travel Notes
Authors: Xiaoxia Lang , Shiya Cheng , Guanyu Wei
Published: July 2021

In recent years, the protection mode of historical blocks has changed from simple material protection to comprehensive protection integrating various factors, and more and more attention has been paid to the role of human perception. How to pay attention to the practical experience of consumers while protecting has become the main problem. This paper studies the tourists' perception of historical district of Eight Great Passes in Qingdao by using the method of network text analysis, and carries out word frequency analysis, semantic network analysis and emotional analysis on the online travel notes by Rost CM6, so as to comprehend the current situation of tourists' perception of different dimensions of Eight Great Passes historical and Cultural District in Qingdao, and find out the problems in its development as well as put forward the sustainable development strategies
Research on Equipment of Concrete Mixing Plant Based on The Internet of Things Technology
Authors: Cai Hualong , Ouyang Ming , Zhu Chengyu , Xiao Zeming
Published: July 2021

Concrete plays an important role in modern engineering construction. Concrete quality relates directly to the quality of the project life cycle and the safety of people's lives and property. Based on the theories and methods of IOT technology, this article applies IOT technology to concrete mixing plant equipment, creatively proposes an integrated system of concrete mixing plants, to control the whole process and the whole cycle of concrete production, and improve the quality of concrete. The practical application of the system has greatly improved concrete production efficiency and production quality.
Research on Urban Waterfront Landscape Design Based on Ecological Urbanism
Authors: Wu Xukun
Published: July 2021

In the overall urban environment the urban waterfront landscape area plays a dual function of landscape and culture, and is an important incubator for the natural ecology of the city. Therefore, the shaping of the locality of the urban waterfront space is not only to create a beautiful city card, but also to improve the ecology of the city and the inevitable requirements of waterfront landscape construction. This paper first analyses the basic theory of urban waterfront landscape, and then conducts an in-depth study on the principles of urban waterfront landscape design under the ecological design concept. Solutions are proposed for the current problems of urban waterfront landscape design, and feasible landscape design methods are proposed in conjunction with the concept of ecological urbanism. The urban landscape is seen as a resource, guided by the theories of ecology and landscape ecology, and the principles of the ecological design concept, with a view to establishing a harmonious and symbiotic relationship between the environment, the landscape and people, and meeting people's needs and spiritual aspirations.
Research on Type Selection of Diving Tower in 110kV Single and Double Circuit Transmission Line
Authors: Yu Xinmin , Chen Xiang , Fu Benzhao , Lin Yinhe , Xin Ye , Xie Ming
Published: July 2021

With the continuous development of EHV (UHV) transmission lines，new lines often need to drill through the built lines，so it is urgent to study the type of diving towers. Based on typical weather conditions and commonly used ground wire models, the basic type and tower type selection of 110kV single and double circuit overpass towers in high altitude areas are studied, and two single and double circuit overpass tower schemes are planned and arranged. And according to the pole tower structure design and optimization theory, the 110kV single-circuit diving tower and the 110kV dual-circuit diving tower are optimized from the structural optimization layout and the pole tower structure node optimization design. The research results show that the single-circuit diving tower adopts the wine glass tower, and the wires are arranged horizontally, and the double-circuit diving tower effectively reduces the height of the tower. The dish-shaped tower is used, and the single-circuit wires are arranged in a triangle pattern, which provides a certain practical guiding significance for the 110kV diving-across technology application.
Research on Poyang Lake Regional Protection and Management Countermeasures under the Change of River-lake Relationship
Authors: Yao Liqiang , Zou Dasheng , Xu Jijun , Liu Yanyi , Yan Bo
Published: July 2021

In recent years, with the construction and operation of the Three Gorges Project, a series of changes have taken place in the relationship between the Yangtze River and Poyang Lake. Changes in hydrological conditions have led to problems in the Poyang Lake area such as early dry season, extended dry duration, and lower dry water level. As the largest freshwater lake in my country, Poyang Lake is an important treasure house of water resources in the middle and lower reaches of the Yangtze River. It is of great significance to study the protection and management of Poyang Lake under the changing relationship between rivers and lakes. This article analyzes the impact of changes in the relationship between rivers and lakes on the hydrological situation of the Poyang Lake area, and sorts out the problems of the ecological environment under the changes of rivers and lakes. On this basis, combined with the ongoing Poyang Lake water conservancy project, the importance of the construction of the hub is analyzed, and relevant suggestions for the current problems facing Poyang Lake are put forward.
A model-based control law for vibration reduction of serial robots with flexible joints
Authors: Farah Jacques , Chanal Hélène , Bouton Nicolas , Gagnol Vincent
Published: July 2021

The presence of flexibilities in rotational joints can limit the kinematic performances of manipulators doing high speed tasks as Pick and Place. The problem addressed in this work concerns the vibration control of serial robots with flexible joints performing Pick and Place tasks in order to improve productivity. Based on a dynamic model of a robot with flexible joints, a model-based control law is proposed with its associated tuning methodology. The robot dynamic model is then the key point of our methodology. This dynamic model considers stiffness and damping of each flexible joint. To guarantee its accuracy, a geometrical and dynamic identification procedure is realized. The objective is to show the relevancy of the proposed approach which integrates joint flexibilities in the control law. Theoretical results based on a representative model are used to illustrate the benefit of this model-based control law compare to two other control strategies (Feedforward control and control dedicated to rigid structures). Finally, a sensitivity analysis of this control law is realized to quantify the impact of modelling error and conclude on the criticality of joint damping value on vibration decreasing.
Minimal invasive prothetische Versorgung als wertvolle Alternative
zum kieferorthopädischen Lückenschluss bei
Zahnnichtanlagen
Authors: Kern Matthias
Published: July 2021

Untere, aber auch obere zweite Prämolaren und obere laterale
Schneidezähne sind die am häufigsten nicht angelegten
Zähne; nicht selten sind auch untere Schneidezähne und erste
Prämolaren nicht angelegt. Im Rahmen einer kieferorthopädischen
Gesamttherapie ist der kieferorthopädische Lückenschluss eine
wertvolle Therapieoption, die aber längst nicht für alle
betroffenen Patientenfälle in Frage kommt.

In diesen Fällen sollten die Lückenbreiten der nicht angelegten
Zähne zum Abschluss der kieferorthopädischen Therapie auf
adäquate Dimensionen eingestellt sein, um die Lücken
jugendlicher Patienten restaurativ zu versorgen. Minimal invasive
Adhäsivbrücken wurden lange Zeit von vielen nur als
provisorische Versorgung zur Überbrückung der Zeit bis zu einer
geplanten „definitiven“ Versorgung mit dentalen Implantaten
angesehen.

Neuere wissenschaftliche Erkenntnisse zeigen jedoch, dass insbesondere
einflügelige Adhäsivbrücken zum Schneidezahnersatz
exzellente Langzeitergebnisse aufweisen, die denen von Einzelzahnimplantaten
nicht nachstehen oder sogar überlegen sind. Aber auch der Ersatz von
nicht angelegten Prämolaren mit einflügeligen
Adhäsivbrücken ist sehr vielversprechend.

Dieser Beitrag fasst den wissenschaftlichen Stand der Versorgung von Patienten
mit minimal invasiven Adhäsivbrücken unter besonderer
Berücksichtigung der Versorgung jugendlicher Patienten mit
Zahnnichtanlagen zusammen.
Akutstationäre Pflege von COVID-19-Patienten bei schwerem Verlauf
Authors: Sperzel Julia
Published: July 2021

Welche speziellen pflegerischen Interventionen sind bei Patienten mit einem schweren Verlauf einer SARS-CoV-2-Erkrankung angezeigt? Autorin Julia Sperzel hat sich für ihre Bachelorarbeit anhand einer Literaturrecherche auf die Suche nach Antworten gemacht und versucht herauszufinden, wie der derzeitige Wissensstand zu diesem Thema ist und welcher Forschungsbedarf besteht.
Iridium-Catalyzed Transfer Hydrogenation for Construction of Quinolines from 2-Aminobenzyl Alcohols with Enones in Water
Authors: Luo Renshi , Luo Nanhua , Shui Hongling , Zhong Yuhong , Huang Jiuzhong
Published: July 2021

Herein, we describe a method for the synthesis of functionalized quinolines from 2-aminobenzyl alcohols with α,β-unsaturated ketones. This method exhibits tolerance to various functional groups and high efficiency, is environmentally benign, and can be performed on a gram scale. Control experiments suggest that this transformation is accomplished by iridium complex catalyzed transfer hydrogenation, which is then followed by Friedländer cyclization. The results display that alkali is essential for the high selectivities of this catalytic system.
Effect of an Educational Intervention on the Knowledge about Traumatic Brain Injury Guidelines among Clinical Nurses
Authors: Subramaniam Sivakami , Prabhakar Preetham , Kanagaraj Umadevi , Baby Priya
Published: July 2021

Objective Traumatic brain injury (TBI) is a major cause of death and disability throughout the world including developing countries like India. Adherence to guideline based TBI management has proven to decrease death rate and improve neurological outcomes. This study aimed to assess the knowledge of TBI guidelines among clinical nurses caring for TBI patients, and to determine the effect of an educational intervention on their knowledge.

Methods Preexperimental, one group pretest and posttest design was used. A purposive sample of 60 nurses was included in the study. A structured questionnaire was prepared to assess the knowledge of nurses. Educational intervention was given in the form of a planned teaching program that was prepared based on the national TBI guidelines.

Results There was a significant gain in the knowledge scores of the nurses after the educational intervention when compared with the knowledge scores before the intervention (p = 0.001) Nurses who were experienced more than 10 years were found to have significantly higher knowledge score than others with lesser years of experience.

Discussion This study demonstrates important knowledge gap about TBI guidelines among clinical nurses. Educational interventions can be effectively used to improve the knowledge about TBI guidelines among nurses.
Safety Analysis of Salvage Surgery for Advanced Stages or Metastatic Lung Cancers
Authors: Bertolaccini Luca , Galetta Domenico , Sedda Giulia , de Marinis Filippo , Spaggiari Lorenzo
Published: July 2021

This case series aimed to analyze the outcomes of patients referred for salvage pulmonary resections after treatment with chemotherapy and immunotherapy for previously metastatic or unresectable tumors.

From October 2016, after multidisciplinary board discussion, eight patients (median: 67 years, range: 52–78 years) underwent medical treatment due to advanced-stage diseases (stage cIIIA–cIVa). Four patients underwent cisplatin-based chemotherapy and, due to progression, were moved to an immunotherapy second line (nivolumab: two patients and pembrolizumab: two patients). Instead, four patients underwent combined cisplatin-based chemotherapy and immune checkpoint inhibitors (atezolizumab: two patients and pembrolizumab: two patients). After a multidisciplinary evaluation for salvage surgery, six patients underwent lobectomies, one patient underwent left pneumonectomy, and one patient underwent upper right lobectomy enlarged to the posterior arches of four ribs. The median duration of surgery was 179 minutes (range: 122–246 minutes). At the final pathological stage, three patients showed a complete major response (ypT0 ypN0), one patient was ypT1a ypN0, one ypT3 ypN0, 2 ypT3 ypN1, and one ypT4 ypN0. The hospital length of stay was 6 days (range: 3–23 days). Two patients had a postoperative complication. At the time of follow-up (median: 15.3 months [range: 1–32 months]), six patients were alive without evidence of the recurrence. Two patients died due to recurrence progression (N3 lymph nodes involvement) of the disease after 6 and 32 months.

In stage IIIB–IVA nonsmall cell lung cancer, salvage lung surgeries after chemotherapy and immunotherapy are feasible, with high rates of R0 resection. Surgery can be technically tricky without significant morbidity and encouraging outcomes (even with a short-interval follow-up).
Anxiety Assessment in Orofacial Pain Patients
Authors: Nikam Shital Sudhakar , Shah Karan Rajendra , Gadgil Rajeev Madhusudan , Utekar Dipika Bharat , Shirsekar Vinayak Umesh
Published: July 2021

Objectives

The aim of the present study was to assess the anxiety level in patients with orofacial pain and to compare it with patients without any orofacial pain.

Materials and Methods

The survey-based study was conducted that included a total of 100 patients who were divided into two groups: 50 patients with orofacial pain and 50 patients without pain. Questionnaire in a local language, that is, Marathi, was formulated based on Modified Dental Anxiety Scale (MDAS) and Hospital Anxiety and Depression Scale (HADS). Data was then subsequently collected and evaluated according to the score of MDAS and HADS.

Results

A total of 78 patients were evaluated according to the questionnaire survey. Highly significant correlation was found between anxiety level and pain present in patient on the MDAS-anxiety level scale(p = 0.001). Also, a significant correlation was observed between anxiety level and pain present in patient on the HADS-anxiety level (p = 0.007). A significant correlation was found between gender and pain anxiety level in patients on the MDAS-anxiety level (p = 0.009).

Conclusion

Anxiety level in patients with orofacial pain can be assessed with MDAS and HADS. Specific types of anxiety-related concerns definitely occur at higher levels in orofacial pain patients in comparison to patients without pain. Greater attention needs to be employed on understanding of anxiety level in orofacial pain patients. This is detrimental in acceptance of treatment by patient and ultimately affects outcome. Anxiety level assessment helps in better understanding of apprehension among the patients with orofacial pain, and enables better delivery of appropriate care and intervention.