bluuebunny/crossref_metadata_2025 huggingface dataset:
A numerical study on CO migration after blasting in high-altitude tunnel by inclined shaft
Authors: Wu Bo , Zhao Rui , Meng Guowang , Xu Shixiang , Qiu Weixing , Chen Huihao
Published: August 2022

On the western plateau of China, ventilation problems brought on by low atmospheric pressure must be overcome. And CO migration after blasting in high-altitude tunnel by inclined shaft has become a significant scientific issue. In this study, the Computational Fluid Dynamics (CFD) method was used to analyze the flow field characteristics at the junction of the inclined shaft and tunnel. In addition, the effects of different fan opening modes and different initial CO concentration distributions on the ventilation were discussed. The simulation results showed that the main difference in the ventilation wind field was reflected in the position of the vortex region due to the different fan opening modes. Meanwhile, various initial CO concentration distributions showed different migration when there was no air volume difference between the left and right tunnels. Eliminating vortex zones and fully using high velocity airflow could improve relative ventilation efficiency by at least 18%. CO would accumulate in the opposite direction of the tunnel if only one of the fans was turned on. Therefore, a two-stage ventilation scheme was proposed, and the energy consumption was reduced by at least 33%. This research can provide guidance on high-altitude tunnel construction with multiple working faces to improve ventilation efficiency and reduce energy consumption.
Disease-related protein co-expression networks are associated with the prognosis of resectable node-positive pancreatic ductal adenocarcinoma
Authors: Nishimura Toshihide , Takadate Tatsuyuki , Maeda Shimpei , Suzuki Takashi , Minowa Takashi , Fukuda Tetsuya , Bando Yasuhiko , Unno Michiaki
Published: August 2022

Pancreatic ductal adenocarcinoma (PDAC) is a multifactorial disease, the molecular profile of which remains unclear. This study aimed at unveiling the disease-related protein networks associated with different outcomes of resectable, node-positive PDAC cases. We assessed laser-microdissected cancerous cells from PDAC tissues of a poor outcome group (POG; n = 4) and a better outcome group (BOG; n = 4). Noncancerous pancreatic duct tissues (n = 5) were used as the reference. We identified four representative network modules by applying a weighted network correlation analysis to the obtained quantitative PDAC proteome datasets. Two network modules that were significant for POG were associated with the heat shock response to hypoxia-related stress; in the latter, a large involvement of the non-canonical Hedgehog pathway (regulated by GLI1), the internal ribosome entry site-mediated cap-independent translation, the inositol requiring enzyme 1-alpha (IRE1α)/X-box binding protein 1 pathway of the unfolding protein response (UPR), and the aerobic glycolysis was observed. By contrast, the BOG characteristic module was involved in the inactivation of the UPR pathway via the synoviolin 1-dependent proteasomal degradation of IRE1α, the activation of SOX2, and the loss of PALB2 (partner and localizer of BRCA2) function, all potentially suppressing malignant tumor development. Our findings might facilitate future therapeutic strategies for PDAC.
Multimodal integration of radiology, pathology and genomics for prediction of response to PD-(L)1 blockade in patients with non-small cell lung cancer
Authors: Vanguri Rami S. , Luo Jia , Aukerman Andrew T. , Egger Jacklynn V. , Fong Christopher J. , Horvat Natally , Pagano Andrew , Araujo-Filho Jose de Arimateia Batista , Geneslaw Luke , Rizvi Hira , Sosa Ramon , Boehm Kevin M. , Yang Soo-Ryum , Bodd Francis M. , Ventura Katia , Hollmann Travis J. , Ginsberg Michelle S. , Gao Jianjiong ,   MSK MIND Consortium, Vanguri Rami , Hellmann Matthew D. , Sauter Jennifer L. , Shah Sohrab P.
Published: August 2022

Immunotherapy is used to treat almost all patients with advanced non-small cell lung cancer (NSCLC); however, identifying robust predictive biomarkers remains challenging. Here we show the predictive capacity of integrating medical imaging, histopathologic and genomic features to predict immunotherapy response using a cohort of 247 patients with advanced NSCLC with multimodal baseline data obtained during diagnostic clinical workup, including computed tomography scan images, digitized programmed death ligand-1 immunohistochemistry slides and known outcomes to immunotherapy. Using domain expert annotations, we developed a computational workflow to extract patient-level features and used a machine-learning approach to integrate multimodal features into a risk prediction model. Our multimodal model (area under the curve (AUC) = 0.80, 95% confidence interval (CI) 0.74–0.86) outperformed unimodal measures, including tumor mutational burden (AUC = 0.61, 95% CI 0.52–0.70) and programmed death ligand-1 immunohistochemistry score (AUC = 0.73, 95% CI 0.65–0.81). Our study therefore provides a quantitative rationale for using multimodal features to improve prediction of immunotherapy response in patients with NSCLC using expert-guided machine learning.
High performance anion exchange chromatographic and colorimetric methods for quality assessment of total and free polysaccharide content in Haemophilus influenzae type b conjugate vaccine containing lactose
Authors: Hussein Asmaa R. , Rezk Mamdouh R. , Fathalla Faten Abdel Aziz , El-Saharty Yasser S. , Nadim Ahmed H.
Published: August 2022

Ultrafiltration or dialysis was used as sample pretreatment to remove 95% of lactose. Free PRP was separated using SPE, and then total and free PRP were analyzed using HPAEC-PAD (ribitol determination) and a colorimetric assay (phosphorus determination).
Lewis acid Mg2+-doped cobalt phosphate nanosheets for enhanced electrocatalytic oxygen evolution reaction
Authors: Qi Jing , Shen Xinxin , Chen Mingxing , Shangguan Enbo , Zhang Wei , Cao Rui
Published: August 2022

Mg2+-doped Co3(PO4)2 and pure Co3(PO4)2 were obtained to explore the effect of Lewis acid ions on the OER. Lewis acid Mg2+ ions can accelerate the adsorption of OH−, charge transfer and pre-oxidation of CoII to enhance the OER activity.
C2product formation in the CO2electroreduction on boron-doped graphene anchored copper clusters
Authors: Barhács Balázs , Janssens Ewald , Höltzl Tibor
Published: August 2022

A possible remedy for the increasing atmospheric CO2concentration is capturing and reducing it into valuable chemicals like methane, methanol, ethylene, and ethanol.
Construction and performance of OLED devices prepared from liquid-crystalline TADF materials
Authors: Suleymanova Alfiya F. , Shafikov Marsel Z. , Chen Xinrui , Wang Yafei , Czerwieniec Rafal , Bruce Duncan W.
Published: August 2022

Emissive liquid-crystalline phthalonitrile carbazole conjugates showing low roll-off in OLED devices.
Homoleptic phenoxy-imine pyridine zinc complexes: efficient catalysts for solvent free synthesis and chemical degradation of polyesters
Authors: D'Aniello Sara , Laviéville Sidonie , Santulli Federica , Simon Malaury , Sellitto Michele , Tedesco Consiglia , Thomas Christophe M. , Mazzeo Mina
Published: August 2022

Robust homoleptic zinc catalysts offer new opportunities for recycling polyesters such as poly(lactic acid) and poly(ethylene terephthalate) to obtain platform molecules in a plastics circular economy approach.
Heteroatom-doped carbon materials derived from covalent triazine framework@MOFs for the oxygen reduction reaction
Authors: Zhang Jing , Xu Yuping , Lan Maowen , Wang Xiaodong , Fu Ning , Yang Zhenglong
Published: August 2022

We summarize a CTF@MOF derived carbon-based catalyst, a CTF supported on MOF surface to prevent CTF collapse and aggregation during pyrolysis, which provides an opportunity to derive CTFs into carbon-based catalysts for enhanced ORR performance.
Parahydrogen-induced polarization study of imine hydrogenations mediated by a metal-free catalyst
Authors: Zakharov Danila O. , Chernichenko Konstantin , Sorochkina Kristina , Repo Timo , Zhivonitko Vladimir V.
Published: August 2022

Imine hydrogenations with parahydrogen mediated by a metal-free ansa-aminoborane catalyst (QCAT) lead to nuclear spin hyperpolarization of amine products and catalytic intermediates. These observations provide mechanistic insights into the reaction.
Recent advances in cobalt-based catalysts for efficient electrochemical hydrogen evolution: a review
Authors: Sun Ran , Huang Xing , Jiang Jibo , Xu Wenxiu , Zhou Shaobo , Wei Ying , Li Mingjing , Chen Yukai , Han Sheng
Published: August 2022

Cobalt is an element with HER potential due to its own advantages. Recent studies on cobalt-based catalysts are categorized, with a focus on strategies to improve the HER catalytic activity of cobalt-based compound catalysts.
The combination of microbiome and metabolome to analyze the cross-cooperation mechanism ofEchinacea purpureapolysaccharide with the gut microbiotain vitroandin vivo
Authors: Liu Chang , Jiang Wenhao , Yang Fangwei , Cheng Yuliang , Guo Yahui , Yao Weirong , Zhao Yong , Qian He
Published: August 2022

Echinacea purpureapolysaccharide (EPP) is a functional compound inEchinacea purpurea.
Ultra-long silver nanowires prepared via hydrothermal synthesis enable efficient transparent heaters
Authors: Basarir Fevzihan , De Swarnalok , Daghigh Shirazi Hamidreza , Vapaavuori Jaana
Published: August 2022

Ultra-long silver nanowires (AgNWs) with an aspect ratio of >2000 were prepared by the hydrothermal synthesis method.
Single s-block and p-block metal sites for photocatalytic degradation of organic pollutants and hydrogen evolution
Authors: Zhao Yafei , Li Qiuze , Lu Song , Li Xinzhong , Nie Kuiying , He Liang
Published: August 2022

A Gibbs free energy diagram for H* adsorption (ΔGH) on metal doped GeSe.
Magnetic particles for triggering insulin release in INS-1E cells subjected to a rotating magnetic field
Authors: Ponomareva Svetlana , Joisten Helene , François Taina , Naud Cecile , Morel Robert , Hou Yanxia , Myers Thomas , Joumard Isabelle , Dieny Bernard , Carriere Marie
Published: August 2022

A novel tool for inducing insulin secretion from pancreatic cells.
Carbothermal redox reaction in constructing defective carbon as superior oxygen reduction catalysts
Authors: Liu Tao , Du Xin-Jie , Li Shuai , Wu Qi-Long , Guo Qi , Liu Zhi-Zhuang , Zhao Jiong-Peng , Liu Fu-Chen
Published: August 2022

The carbothermal reduction of ZnS with carbon could produce a large number of defects during pyrolysis of the [Zn(ptt)2]n. The obtained ZnS/C-1100 with a high defect content and a small number of ZnS nanoparticles exhibits high ORR activity.
Controlling C–C coupling in electrocatalytic reduction of CO2 over Cu1−xZnx/C
Authors: Payra Soumitra , Kanungo Sayan , Roy Sounak
Published: August 2022

From the perspective of sustainable environment and economic value, the electroreduction of CO2 to higher order multicarbon products is more coveted than that of C1 products, owing to their higher energy densities and a wider applicability.
In situ modification of the d-band in the core–shell structure for efficient hydrogen storage via electrocatalytic N2 fixation
Authors: Yang Xiaohui , Wan Jin , Zhang Huijuan , Wang Yu
Published: August 2022

In 2D core/shell V2O3/VN nanomeshes with a gradient nitride-layer thickness, the V2O3 core can tune the d-band structure of the VN shell, strengthen the interaction between N2 and the active site, and thus enhance electrochemical NRR performance.
Cobalt nanoparticles embedded in a nitrogen-doped carbon matrix for reductive amination of biomass-derived furfural to furfurylamine
Authors: Yogita  , Rao K. T. Venkateshwara , Kumar P. Mahesh , Lingaiah N.
Published: August 2022

The selective synthesis of furfurylamine (FAM) through reductive amination of biomass-derived furfural was acheived using Co/NC-700 catalyst.
A review on the effects of doping elements on the properties and applications of lignin-based carbon materials
Authors: Li Peng-Hui , Zhou Hui , Tao Yu-Ting , Wei Yu-Meng , Ren Jian-Peng , Wu Wen-Juan
Published: August 2022

Lignin-based carbon materials have excellent properties, which are greatly enhanced by the doping of different elements, such as non-metallic elements (O, N, S, P, etc.) and metallic elements (Cu, Co, Ni, Fe, Mn, etc.).
The growth and the decay of a visco-elastocapillary ridge by localized forces
Authors: Chan Tak Shing
Published: August 2022

A soft solid layer develops a ridge-like deformation below the contact line when a droplet is in contact with it. Around the ridge tip, the surface tensions not only determine the static shape, but also have a significant impact on the dynamics.
Sequentially optimizing carbon nanotubes framework towards flexible and compact capacitive energy storage
Authors: Yin Qing , Ye Mingyu , Jia Hongbing , Arcanjo de Araújo Melo Antonio Francisco , Ji Qingmin
Published: August 2022

The favorable interfacial π–π interactions between a carbon nanotubes (CNTs) network and an aramid nanofibers (ANFs) film make it possible to assemble a porous yet robust CNTs-based electrode with a double-layer architecture.
A covalent organic framework for high-rate aqueous calcium-ion batteries
Authors: Li Linyuan , Zhang Guobin , Deng Xianming , Hao Jing , Zhao Xu , Li Hongfei , Han Cuiping , Li Baohua
Published: August 2022

Synthesized by 2,5-diaminohydroquinone dihydrochloride (Hq) and 1,3,5-triformylphloroglucinol (Tp), a covalent organic framework for aqueous calcium-ion batteries achieves excellent rate performance.
Luminescence quenching in epitaxially grown PCN-224 type metal–organic frameworks
Authors: Burger Tobias , Velásquez-Hernández Miriam de J. , Saf Robert , Borisov Sergey M. , Slugovc Christian
Published: August 2022

Probing core–shell and multivariant MOFs of the PCN-224 type prepared from metal-free and metalated porphyrin building blocks with luminescence quenching upon exposure to oxygen reveals oxygen quenching to occur also in the core of the MOF.
Hearing Health Care Digital Therapeutics: Patient Satisfaction Evidence
Authors: Tye-Murray Nancy , Spehar Brent , Mauze Elizabeth , Cardinal Christopher
Published: August 2022

Purpose:

A digital therapeutic is a software-based intervention for a disease and/or disorder and often includes a daily, interactive curriculum and exercises; online support from a professional versed in the treatment base; and an online support community, typically active as a social chat group. Recently, the Consumer Technology Association published revised standards for digital therapeutics (DTx) that stipulate that a DTx must be evidence based and founded in scientific evidence showing effectiveness and must be supported by evidence showing improved patient satisfaction and adherence to an intervention. The purpose of this study was to investigate whether a DTx could help older adults better adjust to their hearing loss and acclimate to new hearing aids.

Method:

Thirty older adults with mild or moderate hearing loss who had never used hearing aids participated. All hearing aids were fitted remotely. Participants used a hearing health care DTx (Amptify) for 4 weeks, either immediately following receipt of the hearing aids or 4 weeks after the fitting. A control condition was watching closed caption television. Participants completed a satisfaction questionnaire that queried about their impressions of the DTx, which had items that included both a rating scale of 1–7 and open-ended questions.

Results:

Ninety-six percent of the participants reported positive benefits, and one-half reported that the DTx helped them to adjust to their new hearing aids. They assigned a score of 5.8 to one of the questionnaire items that is similar to a Net Promoter Score Benefits, which included an enhanced ability to engage in conversation and increased listening confidence.

Conclusion:

This investigation provides scientific evidence to support the use of a hearing health care DTx, paving the way for audiologists to be able to more easily and efficiently incorporate follow-up aural rehabilitation into their routine clinical services and to be able to provide services remotely.
Auditory Experience, Speech Sound Production Growth, and Early Literacy in Children Who Are Hard of Hearing
Authors: Farquharson Kelly , Oleson Jacob , McCreery Ryan W. , Walker Elizabeth A.
Published: August 2022

Purpose:

Children who are hard of hearing (CHH) are at risk for literacy difficulties. Speech sound production is related to literacy skills in typically hearing children. Speech sound production abilities can also be markedly weak in CHH due to inconsistent access to the speech signal. We longitudinally examined relations between auditory experience, speech sound production abilities, and literacy (i.e., nonword reading and spelling in second grade) in CHH.

Method:

Participants included 166 CHH. All participants used hearing aids (HAs). Auditory experience is a weighted measure of the number of hours of daily HA use and the amount of audibility with and without their HAs. Children's speech sound production was tested 2–3 times between the ages of 3 and 9 years. At age 5 years and again in second grade, children were tested on a battery of language and literacy measures.

Results:

Auditory experience was significantly correlated with speech sound production abilities, but age at HA fitting was not. Speech sound production abilities at age 5 years did not predict nonword reading in second grade but did predict spelling skills in second grade.

Conclusions:

Our results support the importance of auditory experience and speech sound production for later literacy abilities. Specifically, we found that speech sound production abilities and print knowledge at age 5 years are related to second grade spelling outcomes. Interestingly, we found that morphological knowledge at age 5 years was more predictive of decoding in second grade than was speech sound production. Although there are multiple factors that contribute to literacy success, our results underscore the unique contributions of speech sound production abilities in CHH.
Research to Advance Health and Health Care Equity for People With Communication Disabilities: An Overview of Research Symposium Papers
Authors: Morris Megan A.
Published: August 2022

Presentation Video:

https://doi.org/10.23641/asha.21235632
Non‐chromate conversion process for zinc coating with durable hydrophobicity and enhanced corrosion resistance
Authors: Chen J. Y. , Hu Z. Y. , Li Z. X. , Wang X. L. , Gu C. D. , Tu J. P.
Published: August 2022

A Zn‐based coating with durable hydrophobicity and good corrosion resistance was formed on a mild steel substrate, which involves electroplating Zn from a non‐aqueous electrolyte, followed by passivation in an oleic acid (OA) solution. The electrodeposited Zn coatings were porous, which facilitated the formation of a chemical conversion layer of Zn oleate (ZO) during OA passivation. The Zn coating after passivation had a two‐layer structure, which included an outer layer of ZO with a thickness of ∼26 μm and an inner layer of Zn with a thickness of ∼6 μm. The outer layer ZO is a type of metal soap with a smooth surface and durable hydrophobicity, such that water droplets can easily slip off its surface. Corrosion testing and electrochemical measurements in 3.5 wt.% NaCl aqueous solution indicate that the Zn coating after OA passivation exhibits outstanding anti‐corrosion properties compared with those exhibited by pure Zn coating. The corrosion products and mechanism of the two‐layer coating were explored. This study shows that smooth metal oleate coatings can provide hydrophobicity and corrosion resistance simultaneously to mild steel substrates.
The formation of CO2 through consumption of gas-phase CO on vacuum-UV irradiated water ice
Authors: Terwisscha van Scheltinga J. , Ligterink N. F. W. , Bosman A. D. , Hogerheijde M. R. , Linnartz H.
Published: August 2022

Context. Recent observations of protoplanetary disks suggest that they are depleted in gas-phase CO up to a factor of 100 with respect to predictions from physical-chemical (or thermo-chemical) models. It has been posed that gas-phase CO is chemically consumed and converted into less volatile species through gas-grain processes. Observations of interstellar ices reveal a CO2 component in a polar (H2O) ice matrix, suggesting potential co-formation or co-evolution.

Aims. The aim of this work is to experimentally verify the interaction of gas-phase CO with solid-state OH radicals on the surface of water ice above the sublimation temperature of CO.

Methods. Amorphous solid water (ASW) is deposited in an ultra-high vacuum (UHV) setup at 15 K and irradiated with vacuum-UV (VUV) photons (140–170 nm, produced with a microwave-discharge hydrogen-flow lamp) to dissociate H2O and create OH radicals. Gas-phase CO is simultaneously admitted and only adsorbs with a short residence time on the ASW. Formed products in the solid state are studied in the infrared through Fourier transform infrared spectroscopy and once released into the gas phase with quadrupole mass spectrometry.

Results. Our experiments show that gas-phase CO is converted into CO2 when interacting with ASW that is VUV irradiated with a conversion efficiency of 7–27%. Between 40 and 90 K, CO2 production is constant, above 90 K, CO2 production is reduced in favor of O2 production. In the temperature range of 40-60 K, the CO2 remains in the solid state, while at temperatures 70 K the majority of the formed CO2 is immediately released into the gas phase.

Conclusions. We conclude that gas-phase CO reacts with OH radicals, created on the surface of ASW with VUV irradiation, above its canonical sublimation temperature. The diffusion during the short, but nonzero, residence times of CO on the surface of ASW suggests that a Langmuir-Hinshelwood type reaction is involved. This gas-phase CO and solid-state OH radical interaction could explain (part of) the observed presence of CO2 embedded in water-rich ices when it occurs during the build up of the H2O ice mantle. It may also contribute to the observed lack of gas-phase CO in planet-forming disks, as previously suggested. It should be noted though that our experiments indicate a lower water ice dissociation efficiency than originally adopted in model descriptions of planet-forming disks and molecular clouds. Incorporation of the reduced water ice dissociation and increased binding energy of CO on a water ice surfaces in physical-chemical models would allow investigation of this gas-grain interaction to its full extend.
A robust model for the origin of optical quasi-periodic variability in supersoft X-ray sources
Authors: Zhao Weitao , Meng Xiangcun , Cui Yingzheng , Liu Zheng-Wei
Published: August 2022

Context. Supersoft X-ray sources (SSSs) are known as possible progenitors of Type Ia supernovae. The quasi-periodic variability has been detected in the optical light curves of SSSs. However, the exact origin of such quasi-periodic observable features remains a mystery.

Aims. In this paper, we aim to reproduce the observed optical quasi-periodic variability of SSSs by proposing a white dwarf (WD) accretion model with a periodic mass transfer caused by the irradiation of supersoft X-ray onto the companion star.

Methods. Assuming that a periodic mass transfer from the companion star to the WD can be caused while the supersoft X-ray irradiates the companion star, we used MESA to simulate the WD accretion process and the subsequent WD evolution by adopting a periodic jagged accretion rate.

Results. Comparing our results to the optical light curves of a well-observed SSS RX J0513.9-6951, we find that our models can reproduce the quasi-periodic transition between the optical high and low states of RX J0513.9-6951 because the periodic accretion rate can lead to the WD photosphere expands and contracts periodically in our models. In addition, we find that the transitional periods of the SSSs in our models strongly depend on the mass of the accreting WDs. The more massive the WD mass is, the shorter the transitional period.

Conclusions. Based on our results, we suggest that the periodic mass transfer caused by the irradiation of supersoft X-ray onto the companion star may be the origin of the observed optical quasi-periodic variability in SSSs. In addition, our results indicate that the observed optical transition period of a SSS may be useful for the rough estimate of the mass of an accreting WD.
A global view on star formation: The GLOSTAR Galactic plane survey
Authors: Nguyen H. , Rugel M. R. , Murugeshan C. , Menten K. M. , Brunthaler A. , Urquhart J. S. , Dokara R. , Dzib S. A. , Gong Y. , Khan S. , Medina S.-N. X. , Ortiz-León G. N. , Reich W. , Wyrowski F. , Yang A. Y. , Beuther H. , Cotton W. D. , Pandian J. D.
Published: August 2022

Class II methanol (CH3OH) masers are amongst the clearest signposts of recent high-mass star formation (HMSF). A complete catalogue outlines the distribution of star formation in the Galaxy, the number of young star-forming cores, and the physical conditions of their environment, made possible by the Global View on Star Formation (GLOSTAR) survey. This blind survey of the radio regime of 4–8 GHz maps the Galactic mid-plane in the radio continuum, 6.7 GHz methanol line, the 4.8 GHz formaldehyde line, and several radio recombination lines. We present an analysis of the observations of the 6.7 GHz CH3OH maser transition using data from the D-configuration of the Very Large Array (VLA). We analysed data covering Galactic longitudes from –2° < l < 60° and Galactic latitudes of |b| < 1°. We detected a total of 554 methanol masers, out of which 84 are new, and we catalogued their positions, velocity components, and integrated fluxes. With a typical noise level of ~18 mJy beam−1, this is the most sensitive unbiased methanol survey for methanol masers to date. We also searched for dust continuum and radio continuum associations, finding that 97% of the sources are associated with dust and 12% are associated with radio continuum emission.
Sustaining community-managed rural water supply systems in severe water-scarce areas in Brazil and Tunisia
Authors: Gasmi Hela , Kuper Marcel , Passos Rodrigues Martins Eduardo Sávio , Morardet Sylvie , Burte Julien
Published: August 2022

In many countries, the challenge of sustaining rural water supplies is entrusted to community organizations, which have difficulties in performing durably the operation, maintenance and cost recovery of rural water supply systems. This paper analyzes how rural communities struggle to ensure a sustainable access to water, while seeking close interaction with outside actors such as the State, NGOs, and politicians. The analysis is based on field observations, interviews and participatory workshops in four community-managed water supply systems in Brazil and Tunisia. To sustain the access to water, communities limit their dependance on community-managed water supply systems and diversify water sources for different uses; they adapt the technical and organizational dimensions of water supply systems through bricolage; and use political leverage to obtain financial and technical support. Understanding how communities adapt the infrastructure and the organization of rural water supply, in close interaction with external actors, may inspire water providers in designing more resilient water systems.
Study on Influence of Tin Plating Layer of Solder Strip on Electrical Properties of Photovoltaic Modules
Authors: Ren Xiankun , Ma Yuying , Jiang Chuan , Yan Xiaojun
Published: August 2022

With the continuous development of social economy, the cost reduction and efficiency increase of enterprises are very important for the development of enterprises. Starting from the packaging materials of photovoltaic modules, this paper mainly studies the influence of welding ribbon with different tin layer thicknesses on the performance of photovoltaic modules, and compares the resistivity of welding ribbon with different thickness of tin layers. The experimental results show that with the reduction of the thickness of the tin-plated layer on the non-soldering surface of the welding ribbon, the resistivity of the welding ribbon decreases, and the output power of the photovoltaic module is effectively improved.
Crack study of recasting layer on workpiece surface in Micro-EDM
Authors: Wang Chunmei , Chu Xuyang , Lu Yunxiang , Li Hong
Published: August 2022

In this paper, the crack phenomenon of different materials was studied according to the surface morphology of recasting layer of micro EDM workpiece. In this paper, high-speed steel and titanium alloy are used as workpiece materials, and the RC pulse power supply is used for electric discharge machining. The surface and profile of the recast layer of the workpiece are examined by scanning electron microscopy. The difference between the two in the crack phenomenon of the recast layer in micro electric spark machining is analyzed. Finally, some improvement measures are put forward to solve the problem of recasting layer crack on the surface of micro EDM workpiece.
GPK-YOLOv5s: Content-Aware Reassembly of Features and Self Attention for High Altitude Parabolic Detection and Tracking
Authors: Ying Jie , Li Han , Yang Haima , Zheng Leqian
Published: August 2022

High altitude parabolic is difficult to identify because of its small size, fast speed and changeable state, which makes it difficult for subsequent forensics and accountability. This paper proposes a high-altitude parabolic detection and tracking method GPK-YOLOv5s, which integrates Content-Aware Reassembly of Features (CARAFE) and self-attention to realize parabolic detection and tracking. For the detection network, the backbone integrates C3Ghost module to extract effective features and simplify the network. C3Transformer module is embedded in the feature extraction and fusion layer to pay attention to the global context information. The feature fusion layer uses CARAFE module for up sampling to perceive effective features, and integrates shallow features and deep features to form a new large-scale detection layer (Output4) to further obtain smaller receptive fields. Improved multi-scale detection heads are embedded with CBAM to enhance the expression ability of targets. To overcome the frame loss of real-time detection, improved multiscale detection heads are externally connected with Kalman filter to track targets. This experiment verifies that the detection Precision, Recall and F1 value of GPK-YOLOv5s reached 99.0%, 98.6% and 98.8% respectively, which are 2.8%, 4.1% and 3.5% higher than YOLOv5s respectively. And GPK-YOLOv5s is lighter, and the calculation consumption is reduced by 0.4 GFLOPs.
Research of controller of Permanent magnet linear synchronous motors via model predictive direct thrust control
Authors: Wang Chunmei , Li Hong , Lu Yunxiang , Song zhang
Published: August 2022

How to achieve high-precision control is the core issues of the linear motor research. To solve this problem, this paper proposes a new control algorithm. on the one hand, through the sliding mode control for the unknown torque observations, in the process of observation, select a specific based function to approximate the sign function in order to eliminate the jitter of the vicinity of the switching surface; On the other hand, the use of model predictive control method (Model Predictive Control) to achieve the torque compensator track to achieve the velocity and displacement tracking. The constant sampling time of the model predictive control in the new method can effectively avoid the problems that the number of switching per unit time of the inverter can’t be expected.
Discussion on safety protection of on-line monitoring in self provided power plant
Authors: Zhu Lingkai , Liu Jiyan , Wang Weishuai , Zheng Wei , Zhong Ziwei , Gong Zhiqiang , Guo Junshan , Shang Panfeng
Published: August 2022

This paper expounds the necessity of formulating the security protection strategy for the flexible interactive platform between the captive power plant and the power grid, analyzes the overall security protection strategy, and divides the security zone of the platform according to the overall security protection principle.
A Review of Research on Recyclable Polymer Materials
Authors: Yuan Liyun , Shen Yong
Published: August 2022

Polymer materials have been widely used in applications ranging from aerospace, automobile transportation, medical and health care due to their excellent properties. The current linear production and disposal model of polymeric materials has raised concerns about the continuous consumption of limited fossil fuels and the severe environmental crises. To address the dual challenges of the environment and resources, it is necessary to develop sustainable polymers and more promising recycling strategies. This contribution summarizes the recent research on the preparation of sustainable polymers and their chemical recycling, including polyesters, polycarbonates, polythioesters and polyurethanes.
Experimental Study on Laser Ablation of C/C Composites
Authors: Zheng Jian , Yang Yulong , Gao Yuhang
Published: August 2022

Aiming at the application of C/C composite in nozzle throat lining of solid rocket motor, the thermochemical ablation of C/C composites under CO2 or N2 different confining pressures is studied by using a continuous laser ablation test device, and some useful conclusions are obtained. In CO2 confining pressure environment, with the increase of pressure, the heat absorption effect of thermochemical reaction becomes more obvious, and the surface temperature of the sample decreases. The temperature at 1MPa and 2MPa decreases by 12% and 23% respectively, compared with the maximum temperature in N2 environment because there is no chemical reaction between N2 and C/C composites. The sample surface is carbonized after endothermic, and forms a large number of holes.
Advances in biomimetic mineralization of tooth enamel based on cell-free strategies
Authors: Shi Zhuoyue
Published: August 2022

Tooth enamel is a highly-mineralized hard tissue covering the outermost layer of the dental crown, and amelogenesis is inseparable from the participation of necessary components such as ameloblasts, organic matrix proteins, and mineral ions, such as Ca2+ and PO43-. However, mature enamel is an acellular tissue and it is difficult to self-repair once damaged. The current treatment methods for enamel damage are filling or repairing with alloys, ceramics, or composite resins. However, the mechanical properties of these materials are quite different from the natural enamel and they can’t ensure a completely closed interface with the remaining enamel surface, which usually causes a series of post-repair problems. At present, the biomimetic mineralization of tooth enamel is a research hotspot in the field of prosthodontics, and has great clinical application needs and prospects, especially the researches on cell-free strategies have made significant accomplishment. Here, based on the cell-free strategies, we review the recent knowledge from ex situ and in situ two dimensions in the remineralization of tooth ename.
The training method of group-innovation ability for graduate students in China
Authors: Li Nan , Yan Gongmin , Ren Jianxin
Published: August 2022

Graduate education under the background of double first-class is one of the important contents of Chinese higher education research. The cultivation of innovative ability of postgraduates is an important aspect in postgraduate education. Different from the previous methods of cultivating individual innovation ability, a group innovation ability training method based on the Synectics Method was proposed, and a studio for undergraduates, masters and doctorates was established. Through specific case analysis, it was shown that the proposed group innovation training method is feasible and efficient.
Strategies to promote cross-functional team creativity in SMEs: the cooperative effect of organizational fit and cognitive interaction
Authors: Li Fumeng , Long Jiancheng
Published: August 2022

Given the overwhelming increase in the background of knowledge-based economy and cross-functional team, one of the critical challenges that stimulation of the team creativity face when trying to integrate members across different functions is the need to concern individual-team suitability and overcome differentiated knowledge representation. However, availability of person-organization fit is merely applied to organization s’ development at individual level. And the issue of how to enhance team creativity in the process of interactive coordination and knowledge sharing is largely understudied. Our study attempts to investigate the TMS links between the member-team fit and cross-functional team creativity, we introduce one of the individual self-concept as moderator variable in the above relationships. We have administered a survey design with 82 teams from 35 Sic-tech enterprises and employed the cross-level mediating model for data analysis. Results show that TMS served as a positive mediator between the cross-level relationships and a feasible path of moderated mediation has been explored. These findings indicates that in the formation of a cross-functional team creativity at the cross-level are important mechanisms to understand how the remarkable effects from the individual level are transmitted to the team level.
Construction and application of a comprehensive evaluation system for study travel destination-illustrated by the example of the Shuping Danxia scenic spot in Lanzhou
Authors: Zhang Zhongping , Zou Huan , Zeng Yue , Hu Jialin , Rao Xiaohui
Published: August 2022

Study travel is an educational activity integrating experiential education and study travel. The choice of destination affects the courses design and development of the activities. This paper conducts a systematic research on the evaluation of study travel destinations with the help of Delphi method and hierarchical analysis, selecting four factors such as facility services, education and teaching, geographic environment and resource characteristics to establish a comprehensive evaluation system of study travel destination. The paper takes the Shuping Danxia scenic spot in Lanzhou as an example. The evaluation results show that the development time of Shuping Danxia Scenic Spot is relatively short, and the study travel and course design have not yet been systemized. It is still necessary to further optimize the overall resource quality with local characteristic culture. The evaluation system established in this paper not only helps study travel educators to choose suitable destinations, but also helps to provide references for potential scenic spots to be built as study travel destinations.
Research on blended learning mode based on STEAM
Authors: Wang Xiao , Yin Yalin , Li Xing , Li Tingjun
Published: August 2022

With the continuous development of science and technology, how to integrate modern information technology with STEAM has become the direction of scholars’ exploration. Based on the STEAM education concept and relying on the Learning-through-education cloud platform, this study combines online and offline learning to build a STEAM based blended learning mode. Taking the unit of “Hot Air and Cold Air” of primary school science as a case, specific teaching activities are designed to explore the implementation scheme of this learning mode. The research conclusion is that the implementation of STEAM based blended learning mode can significantly improve students’ classroom participation, and cultivate students’ interdisciplinary knowledge integration ability, problem solving ability and independent learning ability.
An analysis of the conditions, paths and mechanisms for the formation of social capital in private colleges and universities
Authors: Huang Weiyue
Published: August 2022

Social capital is an effective social resource in colleges and universities. It plays an important role in promoting the level of running a school, especially in private colleges and universities. This thesis explored the internal needs of private higher institutions for social financing and expounded the conditions, elements and mechanisms for the formation of social capital in private higher education institutions by analyzing its social fund resources, school size and features of management system. It was concluding that it would be better to take reasonable and effective measures from the president, board of directors, former students, parents, teacher-student relations, school-enterprise cooperation, brand construction, etc. Thus it is full of references for private colleges and universities to make social capital act an effective part in it for a long time.
Research on aesthetic education function and implementation path of music education in application-oriented universities
Authors: Zhang Huacui
Published: August 2022

Aesthetic education in application-oriented colleges and universities realizes the all-round development of people through music education, which not only enrichis the basic theory of aesthetic education, but also provides an effective way and breakthrough point for the development of aesthetic education in application-oriented colleges and universities. Based on the analysis of the current practical situation and problems of music education in application-oriented universities, from the principle of music education following the rules of aesthetic education, based on the reality of application-oriented universities, This paper puts forward that the development of music education in application-oriented universities should start from changing educational concepts, optimizing the structure of teachers, standardizing teaching contents and methods, perfecting management system and evaluation mechanism and creating cultural atmosphere, so that music education can play an irreplaceable role in realizing the all-round development of talents.
Design and practice of ideological and political teaching of database Principle and Application course
Authors: Wang Mengxia
Published: August 2022

On the basis of analyzing the characteristics of database principle and application course, this paper explores the ideological and political elements of curriculum, introduces the implementation measures of curriculum ideological and political, and discusses how to carry out ideological and political teaching in database principle and application course from the aspects of teaching objectives, teaching content, teaching design, teaching methods and means, and practical teaching. Finally, through the investigation and feedback, the database principle and the implementation effect of the applied curriculum teaching are illustrated.
Research on the application of urban air quality prediction and prediction model under the background of big data
Authors: Liu Li
Published: August 2022

In the previous research on air quality prediction, the research on the problem is usually one-sided, and many problems are solved from a single time dimension. In the research of this problem, this paper starts from the time dimension and the space dimension respectively. Considering the temporal continuity and spatial diffusion of air pollutants, the prediction results of the two dimensions are dynamically combined. Comprehensive consideration of various factors to achieve better prediction results. In order to solve the problem that there are few air quality monitoring stations in cities and there is no monitoring data in a large number of areas, an air quality prediction model is proposed.
Application of MATLAB in signal and system
Authors: Qu Qiuhui
Published: August 2022

Signal and system course is an important professional basic course for electronic information and communication majors. Signal and system are abstract concepts, which are described by mathematical models. In daily life, simple signals can be calculated or drawn manually, but complex signals are difficult to be accurately processed. Matlab contains graphics processing and symbol operation functions, which provides us with powerful tools to solve the above problems. This paper will introduce how to use Matlab to express, calculate and process signals, and realize the systematic analysis of signals.
Os Predadores Naturais da Vespa-Asiática (Vespa velutina) e a Contribuição do Abelharuco (Merops apiaster) para o seu Controlo
Authors: Onofre Nuno , Portugal e Castro M.Inês , Nave Anabela , Godinho Joana
Published: August 2022

Neste artigo fazemos uma revisão dos predadores vertebrados naturais da Vespa-asiática (Vespa velutina) na Europa e em Portugal em particular, enumerando aqueles para os quais já existem observações comprovadas e aqueles que, por se alimentarem da Vespa-europeia (Vespa crabro), mesmo que irregularmente, podem ser considerados consumidores potenciais da primeira. Damos particular atenção ao Vespeiro (Pernis apivorus) e ao Abelharuco (Merops apiaster), por serem potencialmente os predadores vertebrados mais importantes da Vespa-asiática, seja porque são especialistas em insectos da subordem Apocrita -que inclui as vespas, abelhas e formigas -, seja porque para eles existe considerável informação sobre a sua ecologia trófica. Fruto de um estudo realizado em 2021, os resultados confirmam que o Abelharuco captura Vespa-asiática, mas desconhecemos ainda quão importante é este consumo. Embora a Abelha-europeia (Apis mellifera) seja a espécie mais frequente nos restos de presas colhidos, a dieta desta ave aparenta ser diversa.
Models of Silviculture for Portuguese Species: Old and New Guidelines
Authors: Gonçalves Ana Cristina
Published: August 2022

Models of silviculture are used for the selection and scheduling of the silvicultural practices from installation to the end of the production cycle. Most of the published models of silviculture are for even aged stands. Those for mixed and uneven aged stands are scarce. The goal of this study was the development of models of silviculture for Portuguese species; with examples for Pinus pinea, Quercus suber Quercus rotundifolia, Pinus pinaster and Castanea sativa. Five stand structures were considered (pure even aged, mixed even aged, temporary mixed even aged, pure uneven aged and mixed uneven aged). For mixed stands were considered two species admixtures and for uneven aged 2, 3 and 4 cohorts. The local level models of silviculture developed in this study are conceptual frameworks where guidelines can be derived to define the model of silviculture for a stand, including target stand structure and production cycle, according to management goals, species and site. Overall, it was intended to stress the importance of defining models of silviculture that are flexible to accommodate a wide range of management options and that should be dynamic in space and time. These models cannot be used directly but have to be adapted to each stand.
Bluthochdruck und Omega-3 – studienbasierte Zusammenhänge?
Authors: Engelbert Christian W.
Published: August 2022

Die essenzielle Rolle von Omega-3-Fettsäuren erlangt immer größere Bekanntheit und Akzeptanz. Regelmäßig fragen nun Patienten, ob Omega-3 auch gegen Bluthochdruck helfe. Welche seriösen Empfehlungen können den Patienten dazu an die Hand gegeben werden? Mittlerweile liegen zahlreiche Studien vor, die die Wirksamkeit und Tragweite von Omega-3-Fettsäuren beweisen. Vor der Betrachtung des Themas Bluthochdruck und Omega-3 greift der Artikel die Fettsäuren sowie die beiden Gruppen der bedeutsamen Omega-Fettsäuren heraus, beleuchtet diese näher und geht auch auf die beiden neuesten Studien JELIS und REDUCE-IT ein.