bluuebunny/crossref_metadata_2025 huggingface dataset:
Thermo-dynamical modelisation of the degradation of a ball bearing in variables use conditions
Authors: Belmiloud Dalila , Lachi Mohammed , Pron Hervé , Bolaers Fabrice , Dron Jean-Paul , Chiementin Xavier , Laggoun Ali
Published: October 2020

Many sources of heat can emanate from the operation of a rotating machine, and one of which is the friction among the different parts of the ball bearings. Over time, these frictions may lead to a tearing of matter of the rings or on the rolling elements that cause some type of degradation by flaking. Flaking, in turn, produces a repetitive shock as a new source of thermal energy. This work proposes a physical model for the study of the thermal heating of a ball bearing during operation. The resolution of the energy balance is achieved by the Nodal method where both the heating due to friction and the heat induced by the passage of the balls on defect are taken into account. The proposed thermal model is validated through an experimental thermal analysis. The obtained results show that the temperature increases in the position of defect ball ring with increasing rotational speed. The same results are obtained for the influence of radial load.
Reward system design supportive to human capital stabilization in a company
Authors: Joniaková Zuzana , Grančičová Katarína , Blštáková Jana
Published: October 2020

The stabilization of human capital at the enterprise level presupposes the systematic and effective use of human resources management tools. One of these tools is the employees’ reward system. The paper in its theoretical contribution defines the conditions under which rewarding serves as an instrument for stabilizing human capital in an enterprise. Consequently, on the basis of its own survey data, the paper contains analysis of reward systems in companies in Slovakia in order to describe their development, current status and trends in the given context. Summary conclusions contains findings, that despite the significant and positive shift in several areas of remuneration systems in companies in Slovakia, the situation is still not optimal and offers room for further development.
Current measures to maintain the stability of workers in Slovak companies
Authors: Kissová Jana , Dubcová Gabriela
Published: October 2020

Over a short period of time, individual countries in the world face a common problem that affects them and adversely affects the lives of individuals. In connection with the current emergency situation related to the corona virus pandemic, it is possible to notice fundamental changes and enormous impact in the social or economic dimension. The aim of the article is to provide an overview of the current situation in selected countries and to compare the system of measures in the Slovak Republic and the Czech Republic that were adopted in order to stabilize or retain workers or aimed at elimination of imminent damage.
Are Supporting Sectors of the Creative Industries Inferior? Current study from Slovakia.
Authors: Kmety Barteková Mária , Majdúchová Helena
Published: October 2020

The aim of the contribution is to analyse the current state of the supporting sectors within the creative industries, to identify and quantify the role of the supporting sectors in the Slovak economy. In the European union, there are huge expectations associated with the creative industries. Based on the following findings, we can conclude that the low level of external investments is caused by the low possibility to get the loans. There is no relation between the regional density of supporting sectors’ enterprises and the economic results reached by these regions.
Analysis of Reporting Period Flexibility
Authors: Kubaščíková Zuzana , Juhászová Zuzana , Tumpach Miloš
Published: October 2020

Entities take advantage of the possibility of changing the reporting period (to other than the calendar year) because such a change has a rational basis, usually regarding the specific type of business of a particular entity. They are therefore entities that are seasonal in nature respective to their economic activities. As part of the analysis, of the use of the alternative reporting period by the Slovak accounting entities, we present in addition to the number of accounting entities also their area of business to substantiate the reasons why the entity lead to change in the reporting period.
The effect of formalization in the enterprise
Authors: Skorková Zuzana
Published: October 2020

Formalization is one of the pillars of a bureaucratic company. It is manifested by a high number of formally given rules, procedures and written guidelines. These documents guide the way of employees’ conducting and their activities. Precisely defined rules determine the way of work and based on rules the activities are divided among the employees of the company. They feel that the rules are readable, clear and valid for everyone. Research shows a positive correlation between the effectiveness of business activities and the degree of formalization. On the other hand too detailed rules prevent creativity, initiative and self-development. Employees require rules and written materials from the sovereign’ supervisor to solve every problem, often one that the employees themselves can easily solve. Our contribution is dedicated to formalization and its impact on employee initiative to make changes in the organization. In a sample of 190 companies, we confirmed that with the increasing formalization, the initiative of employees to change has been decreasing.
Ginkgoblatt oder Pfifferling – Sonomorphologie von
Morton-Neuromen
Authors: Gardill Klaus
Published: October 2020

Hintergrund

Bei der Morton-Metatarsalgie handelt es sich um ein chronisches Kompressionssyndrom
der distalen Nn. digitales plantares des N. tibialis zwischen den Köpfchen
der Mittelfuβknochen. Betroffen sind am häufigsten die
Nervenäste zwischen den Ossa metatarsalia III und IV, weniger häufig
II und III, noch seltener in den übrigen Zwischenräumen. Das
pathologische Korrelat dieser Störung sind die sog. Morton-Neurome als
gutartige Verdickungen der kleinen Nerven in diesem Bereich. Sinnvolle
elektrophysiologische Untersuchungen zur Diagnostik der daraus resultierenden
Morton-Metatarsalgie existieren nicht, sodass den bildgebenden Verfahren eine
besondere Bedeutung zukommt, neben der Kernspintomografie besonders die
Nervensonografie, die mit relativ geringem Aufwand kostengünstig auch in
einer neurologischen Praxis oder einer Funktionsabteilung durchgeführt
werden kann. Die Sensitivität von Nervensonografie und Kernspintomografie
scheint etwa gleich hoch zu sein, möglicherweise ist die Nervensonografie
sogar in der Spezifität überlegen 1
5.
A Snapshot of Pediatric Patients with COVID-19 in a Pandemic Hospital
Authors: Duramaz Burcu Bursal , Turel Ozden , Korkmaz Cigdem , Karadogan Muhammed Talha , Yozgat Can Yilmaz , Iscan Akin , Sümbül Bilge , Erenberk Ufuk
Published: October 2020

Aim Reports describing coronavirus disease 2019 (Covid-19) in children are fewer than adult studies due to milder clinical picture. We aimed to share our experience at a single center with an emphasis on collective decision making.

Materials and Methods A suspected case was defined as the presence of symptoms suggestive of COVID-19 and/or positive contact history. SARS-CoV-2 PCR positive patients were defined as confirmed COVID-19. Between March 12, 2020, and May 15, 2020, all children presenting with fever, cough, or respiratory difficulty were investigated for COVID-19. A total of 719 children were examined at outpatient clinics, and 495 were tested with polymerase chain reaction (PCR) for suspicion of COVID-19. A team was organized for monitoring and treating patients either as outpatients or hospitalization. Patients were evaluated in terms of age, gender, travel history, epidemiological history, clinical symptoms and signs, laboratory and radiological findings, treatment, and outcome.

Results Sixty patients were hospitalized for suspicion of COVID-19. Forty-three patients were diagnosed as probable or confirmed COVID-19. 21 of 43 patients (48.8%) were PCR confirmed. The remaining 22 were diagnosed by epidemiologic history, clinical assessment, and computerized thorax tomography (CT) findings. The median age was 126 and 78.5 months in PCR positives and PCR negatives, respectively and the youngest patient was a 28 days old baby. Nineteen of the patients had an upper respiratory infection (44.1%). Although five patients had no clinical signs, chest X-ray, or CT revealed pneumonia.

Conclusions As previously reported, the clinical manifestations of COVID-19 in children are mostly mild. Even very young kids can become infected following exposure to sick family members. International and local guidelines are valuable for decision making since it is a new disease. A combination of chest disease, infectious diseases, and emergency care physicians approach will aid the appropriate management of cases.
Achiote (Bixa orellana) Lipophilic Extract, Bixin, and δ-tocotrienol Effects on Lifespan and Stress Resistance in Caenorhabditis elegans
Authors: Gómez-Linton Darío R. , Alavez Silvestre , Navarro-Ocaña Arturo , Román-Guerrero Angélica , Pinzón-López Luis , Pérez-Flores Laura J.
Published: October 2020

The onset of many degenerative diseases related to aging has been associated with a decrease in the activity of antistress systems, and pharmacological interventions increasing stress resistance could be effective to prevent the development of such diseases. Achiote is a valuable source of carotenoid and tocotrienols, which have antioxidant activity. In this work, we explore the capacity of an achiote seed extract and its main compounds to modulate the lifespan and antistress responses on Caenorhabditis elegans, as well as the mechanisms involved in these effects. Achiote lipophilic extract, bixin, and δ-tocotrienol were applied on nematodes to carry out lifespan, stress resistance, and fertility assays. The achiote seed extract increased the median and maximum lifespan up to 35% and 27% and increased resistance against oxidative and thermal stresses without adverse effects on fertility. The beneficial effects were mimicked by a bixin+δ-tocotrienol mixture. All the effects on lifespan and stress resistance were independent of caloric restriction but dependent on the insulin/insulin growth factor-1 pathway. This study could provide insights for further research on a new beneficial use of this important crop in health and nutraceutical applications beyond its use as a source of natural pigments.
Remdesivir: Critical Clinical Appraisal for COVID 19 Treatment
Authors: Chatterjee Saptarshi
Published: October 2020

Remdesivir is presently been considered as ‘molecule of hope’ to curb the menace of COVID19. Non-availability of any USFDA approved drug has led to several attempt of drug-repurposing and development of new therapeutic molecules. However, Remdesivir has been found to be effective against a broad range of virus including SARS, MERS and COVID 19 through in-vitro studies. Several clinical research attempt are presently being conducted showing promising result yet not conclusive. This review summarized all such clinical trials to critically appraise the usage of Remdesivir against COVID 19 along with the publications related to the results of the clinical studies. The present regulatory aspect i. e. Emergency Use Authorization (EYA) and information of molecule and plausible mechanism is also dealt.
Robotic-Assisted Patellofemoral Replacement—Correlation of Preoperative Planning with Intraoperative Implant Position and Early Clinical Experience: A Minimum 2-Year Follow-up
Authors: Selvaratnam Veenesh , Cattell Andrew , Eyres Keith S. , Toms Andrew D. , Phillips Jonathan R.P. , Mandalia Vipul I.
Published: October 2020

Patello-femoral arthroplasty (PFA) is successful in a selected group of patients and yields a good functional outcome. Robotic-assisted knee arthroplasty has been shown to provide better implant positioning and alignment. We aim to report our early outcomes and to compare Mako's (Robotic Arm Interactive Orthopaedic System [RIO]) preoperative implant planning position to our intraoperative PFA implant position. Data for this study was prospectively collected for 23 (two bilateral) patients who underwent robotic-assisted PFA between April 2017 and May 2018. All preoperative implant position planning and postoperative actual implant position were recorded. Presence of trochlear dysplasia and functional outcome scores were also collected. There were 17 (two bilateral) female and 6 male patients with a mean age of 66.5 (range: 41–89) years. The mean follow-up period was 30 (range: 24–37) months. Eighteen knees (72%) had evidence of trochlear dysplasia. The anterior trochlear line was on average, 7.71 (range: 3.3–11.3) degrees, internally rotated to the surgical transepicondylar axis and on average 2.9 (range: 0.2–6.5) degrees internally rotated to the posterior condylar line. The preoperative planning range was 4-degree internal to 4-degree external rotation, 4-degree varus to 6-degree valgus, and 7-degree flexion to 3-degree extension. The average difference between preoperative planning and intraoperative implant position was 0.43 degrees for rotation (r = 0.93), 0.99 degrees for varus/valgus (r = 0.29), 1.26 degrees for flexion/extension (r = 0.83), and 0.34 mm for proudness (r = 0.80). Six patients (24%) had a different size component from their preoperative plan (r = 0.98). The mean preoperative Oxford Knee Score (OKS) was 16 and the mean postoperative OKS was 42. No patient had implant-related revision surgery or any radiological evidence of implant loosening at final follow-up. Our early results of robotic PFA are promising. Preoperative Mako planning correlates closely with intraoperative implant positioning. Longer follow-up is needed to assess long-term patient outcomes and implant survivorship.
Immunoinflammatory, Thrombohaemostatic, and Cardiovascular Mechanisms in COVID-19
Authors: Gencer Selin , Lacy Michael , Atzler Dorothee , van der Vorst Emiel P. C. , Döring Yvonne , Weber Christian
Published: October 2020

The global coronavirus disease 2019 (COVID-19) pandemic has deranged the recent history of humankind, afflicting more than 27 million individuals to date. While the majority of COVID-19 patients recuperate, a considerable number of patients develop severe complications. Bilateral pneumonia constitutes the hallmark of severe COVID-19 disease but an involvement of other organ systems, namely the cardiovascular system, kidneys, liver, and central nervous system, occurs in at least half of the fatal COVID-19 cases. Besides respiratory failure requiring ventilation, patients with severe COVID-19 often display manifestations of systemic inflammation and thrombosis as well as diffuse microvascular injury observed postmortem. In this review, we survey the mechanisms that may explain how viral entry and activation of endothelial cells by severe acute respiratory syndrome coronavirus 2 can give rise to a series of events including systemic inflammation, thrombosis, and microvascular dysfunction. This pathophysiological scenario may be particularly harmful in patients with overt cardiovascular disease and may drive the fatal aspects of COVID-19. We further shed light on the role of the renin–angiotensin aldosterone system and its inhibitors in the context of COVID-19 and discuss the potential impact of antiviral and anti-inflammatory treatment options. Acknowledging the comorbidities and potential organ injuries throughout the course of severe COVID-19 is crucial in the clinical management of patients affecting treatment approaches and recovery rate.
A unified model for DNA bipedal nanomotors
Authors: Xu Huijuan , Hou Ruizheng , Li Hongrong , Wang Zhisong
Published: October 2020

Experimental development of translational DNA nanomotors recently underwent a paradigm shift from bridge-burning monomers to symmetric dimers capable of truly sustainable motion. The focus of direction rectification is changed from carving the external landscape of a single particle to symmetry breaking from within a dimer. The symmetric dimer construction have the potential to facilitate efficient motors as friction, which is inevitable as a single particle moving in a viscous environment, may vanish for paired systems. However, creating high-performing nanomotors remains an open question from a fundamental physics perspective. Here, we present a realistic physical model for dimeric nanomotors that can be exactly solved to yield motor functions from experimentally accessible non-motor elements by mere physical laws—in a surprisingly rich mechanistic variety covering virtually all advanced dimeric DNA nanomotors invented to date plus major biological counterparts to a certain extent. The model exposes a high-performing regime with a sign of superlubricity for efficient motor operation. Reasonably simple for accurate treatments yet mechanistically telling, the present model has potential to evolve into a generic model to guide experimental optimization of DNA nanomotors toward low-dissipation operation.
Soil nutrient variation along a shallow catena in Paracou, French Guiana
Authors: Van Langenhove Leandro , Verryckt Lore T. , Stahl Clement , Courtois Elodie A. , Urbina Ifigenia , Grau Oriol , Asensio Dolores , Peguero Guille , Margalef Olga , Freycon Vincent , Peñuelas Josep , Janssens Ivan A.
Published: October 2020

Tropical forests are generally considered to stand upon nutrient-poor soils, but soil nutrient concentrations and availabilities can vary greatly at local scale due to topographic effects on erosion and water drainage. In this study we physically and chemically characterised the soils of 12 study plots situated along a catena with a shallow slope in a tropical rainforest in French Guiana both during the wet and the dry season to evaluate seasonal differences. Soils along the catena were all Acrisols, but differed strongly in their water drainage flux. Over time, this differential drainage has led to differences in soil texture and mineral composition, affecting the adsorption of various nutrients, most importantly phosphorus. The more clayey soils situated on the slope of the catena had higher total concentrations of carbon, nitrogen, phosphorus and several micronutrients, while extractable nutrient concentrations were highest in the sandiest soils situated at the bottom of the catena. We found that carbon, nitrogen and extractable nutrients all varied seasonally, especially in the surface soil layer. These results are interesting because they show that, even at the local scale, small differences in topography can lead to large heterogeneity in nutrient concentrations, which can have large impacts on plant and microbial community organisation at the landscape level.
Voluntary restrictions on self-reliance increase cooperation and mitigate wealth inequality
Authors: Gross Jörg , Böhm Robert
Published: October 2020

Significance

Amid climate change and pandemics, humans increasingly face shared problems that require cooperation. However, cooperation is plagued with the free-rider problem and can fail. Self-reliance—the ability to solve shared problems individually—remedies the problem of cooperation but forgoes benefits of collective action and can lead to a divide between those that can afford to be self-reliant and those that cannot. Using an experimental paradigm, we show that groups endogenously increase social interdependence by voluntarily restricting self-reliance when faced with a shared problem, fostering both cooperation and wealth equality. This demonstrates how groups self-select institutions that increase their ability to cooperate. However, our results also point to factors that decrease this willingness to curtail freedom of choice.
Deliberating over legislative ends
Authors: Ihnen Jory Constanza
Published: October 2020

This paper outlines a non-exhaustive inventory of presumptive argument schemes that can be used by legislators to rationally argue for and against the legitimacy of legislative ends. The inventory has both a descriptive and normative dimension. The inventory is descriptive because it is partly based on the empirical observation of arguments actually used by legislators in a sample of lawmaking debates. However, the inventory is also normative because – as I shall argue in this paper – the schemes identified in the sample are presumptive arguments schemes. They are therefore schemes with a claim to rationality, provided that certain conditions are met. The schemes included in the inventory are: the scheme of instrumental argumentation, the scheme from unintended consequences, the scheme from values, the schemes from model and antimodel, and the schemes from social demand.
Plains Cree animacy–inanimacy hierarchy
Authors: van Eijk Jan , Collette Vincent
Published: October 2020

Like all Algonquian languages, Cree distributes its stock of nouns over two classes: animate and inanimate. While this distinction is firmly based on different agreement rules, and is to a large extent (but not completely) backed up by semantic differences, Cree nouns can also be put on a 4-level hierarchy scale, depending on their morphological valence with regard to whether or not they allow markers for the plural, obviative, vocative/honorific, absentative or which one of the two types of locatives. In addition, in a few recorded cases an inanimate noun may be reclassified, or “promoted”, as an animate noun, but rarely vice versa. Although this paper concentrates on Plains Cree, and examples are from that dialect unless otherwise noted, some observations are also made on (in)animacy in East Cree and in a wider Algonquian context.
Understanding complex dynamics of interfacial reconstruction in polyampholyte hydrogels undergoing mechano-chemo-electrotaxis coupling
Authors: Xing Ziyu , Lu Haibao , Sun Ansu , Fu Yong Qing , Shahzad Muhammad Wakil , Xu Ben Bin
Published: October 2020

Polyampholyte (PA) hydrogels have attracted significant attention for their superior mechanical strength and toughness compared with other conventional hydrogels. In this study, we present a novel thermodynamic approach to understanding the mechano-chemo-electrotaxis coupling and interfacial dynamics in PA hydrogels. Flory–Huggins theory, carried out through an interfacial free-energy model, is the foundation for the quantitative study of the mechanically constitutive relationship of the PA gels. The proposed free-energy model is further extended to describe the mechano-chemo-electrotaxis switching and interfacial dynamics by co-relating the Williams–Landel–Ferry equation and scaling laws. It was concluded that the interfacial bonding strength is the key factor influencing the mechanical strength and reconstruction reversibility of the PA macromolecular gel system. The resulting analytical outcomes showed good agreement with the reported experimental data. We opine that the proposed model will guide the future application of PA hydrogels.
Electrochromic evaluation of airbrushed water-dispersible W18O49 nanorods obtained by microwave-assisted synthesis
Authors: Scarfiello Riccardo , Prontera Carmela Tania , Pugliese Marco , Bianco Giuseppe Valerio , Bruno Giovanni , Nobile Concetta , Carallo Sonia , Fiore Angela , Sibillano Teresa , Giannini Cinzia , Giannuzzi Roberto , Carbone Luigi , Gigli Giuseppe , Maiorano Vincenzo
Published: October 2020

Motivated by the technological relevance of tungsten oxide nanostructures as valuable materials for energy saving technology, electrochemical and electrochromic characteristics of greener processed nanostructured W18O49-based electrodes are discussed in this work. For the purpose, microwave-assisted water-dispersible W18O49 nanorods have been synthesized and processed into nanostructured electrodes. An airbrushing technique has been adopted as a cost-effective large-area scalable methodology to deposit the W18O49 nanorods onto conductive glass. This approach preserves the morphological and crystallographic habit of native nanorods and allows highly homogeneous transparent coating where good electronic coupling between nanowires is ensured by a mild thermal treatment (250 °C, 30 min). Morphological and structural characteristics of active material were investigated from the synthesis to the nanocrystal deposition process by transmission and scanning electron microscopy, x-ray diffraction, atomic force microscopy and Raman spectroscopy. The as-obtained nanostructured film exhibited good reversible electrochemical features through several intercalation–deintercalation cycles. The electrochromic properties were evaluated on the basis of spectro-electrochemical measurements and showed significant optical contrast in the near-infrared region and high coloration efficiency at 550 nm.
Plasmonic gap-enhanced Raman tag nanorods for imaging 3D pancreatic spheroids using surface-enhanced Raman spectroscopy and darkfield microscopy
Authors: Darrigues Emilie , Nima Al Sudani Zeid A , Watanabe Fumiya , Biris Alexandru S
Published: October 2020

Plasmonic gap-enhanced Raman tags (GERTs) are new emerging nanoprobes that, based on their unique surface-enhanced Raman spectroscopy (SERS) signal, can play a major role in complex imaging and detection of biological systems. GERTs are generated from a metal core nanostructure and layered with one or more metal nanosized layers, encasing a Raman active molecule. The advantages of GERTs are enhanced surface plasmon and electromagnetic resonance, as well as inherent protection of the Raman active molecule from environmental deterioration that could reduce their spectroscopic signatures over time. In this study, we used in vitro three-dimensional (3D) spheroid cultures to demonstrate these advantages. 3D spheroids mimic the in vivo tumor microenvironment better than 2D culture, with abundant extracellular matrix and hypoxia inducing variability of pH and enzymatic reactions. Here, we report the use of GERTs in large pancreatic 3D spheroids (>500 μm in apparent diameter) for complex penetration visualization. Our combined imaging technique of enhanced darkfield microscopy and SERS was able to identify the presence and distribution of the GERTs within the 3D spheroid structure. The distribution of GERTs 2 hours after the nanorods’ incubation indicated accumulation, generally in the outermost layer of the spheroids but also, more randomly, in non-uniform patterns in deep layers of the 3D spheroids. These observations bring into question the mechanism of uptake and flow of the nanoparticles in function of their incubation time while demonstrating the promising potential of our approach. Additionally, the SERS signal was still detectable after 24 hours of incubation of GERTs with the 3D culture, indicating the stability of the Raman signal.
Photonic crystal based all-optical half adder: a brief analysis
Authors: Sivaranjani R , Shanmuga Sundar D , Sridarshini T , Sitharthan R , Karthikeyan M , Sivanantha Raja A , Carrasco Marcos Flores
Published: October 2020

A photonic crystal (PhC) based optical component paves a path to the upcoming all-optical computer processors. All the components can be realized with the help of PhCs. In particular, optical gates have played a major part in the development of all-optical half adders which has lead to the bloom of optical computing technology. In this paper, a PhC based optical half adder is proposed and a brief analysis is carried out for the different crystal structures and lattice patterns. The efficiency of the device is analyzed by providing proper distinct space in output power between logical ‘0’ and ‘1’ states and it operates well even in the reduced input power level. The error can be minimized while identifying the logical states (logic ‘0’ and logic ‘1’), by setting a threshold limit for output power. The threshold level is fixed such that if it is greater than 0.7 µW, it is considered as logic ‘1’, and if it is less than 0.35 µW, then it will be taken as logic ‘0’. The device with circular crystals in a hexagonal lattice provides a better contrast ratio of 12.55 dB and 9.29 dB for ‘sum’ and ‘carry’ respectively. The miniature size of the proposed device depicts that this device is compatible with photonic integrated circuit (PIC) applications.
Quasi-stationary states in temporal correlations for traffic systems: Cologne orbital motorway as an example
Authors: Wang Shanshan , Gartzke Sebastian , Schreckenberg Michael , Guhr Thomas
Published: October 2020

Traffic systems are complex systems that exhibit non-stationary characteristics. Therefore, the identification of temporary traffic states is significant. In contrast to the usual correlations of time series, here we study those of position series, revealing structures in time, i.e. the rich non-Markovian features of traffic. Considering the traffic system of the Cologne orbital motorway as a whole, we identify five quasi-stationary states by clustering reduced-rank correlation matrices of flows using the k-means method. The five quasi-stationary states with nontrivial features include one holiday state, three workday states and one mixed state of holidays and workdays. In particular, the workday states and the mixed state exhibit strongly correlated time groups shown as diagonal blocks in the correlation matrices. We map the five states onto reduced-rank correlation matrices of velocities and onto traffic states where free or congested states are revealed in both space and time. Our study opens a new perspective for studying traffic systems. This contribution is meant to provide a proof of concept and a basis for further study.
Universality of eigenvector delocalization and the nature of the SIS phase transition in multiplex networks
Authors: Ferraz de Arruda Guilherme , Méndez-Bermúdez J A , Rodrigues Francisco A , Moreno Yamir
Published: October 2020

Universal spectral properties of multiplex networks allow us to assess the nature of the transition between disease-free and endemic phases in the SIS epidemic spreading model. In a multiplex network, depending on a coupling parameter, p, the inverse participation ratio (IPR) of the leading eigenvector of the adjacency matrix can be in two different structural regimes: (i) layer-localized and (ii) delocalized. Here we formalize the structural transition point, p*, between these two regimes, showing that there are universal properties regarding both the layer size n and the layer configurations. Namely, we show that IPR ∼ n
−δ
, with δ ≈ 1, and revealed an approximately linear relationship between p* and the difference between the layers’ average degrees. Furthermore, we showed that this multiplex structural transition is intrinsically connected with the nature of the SIS phase transition, allowing us to both understand and quantify the phenomenon. As these results are related to the universal properties of the leading eigenvector, we expect that our findings might be relevant to other dynamical processes in complex networks.
Application of Lake Wetland Ecological Rehabilitation Technology in Environmental Pollution Control and Ecological Rehabilitation
Authors: Wang Junling , Zhong Changlong , Kuang Min , Yang Jiefeng
Published: October 2020

With the continuous development of the economy, environmental pollution has become more and more serious, especially water pollution. During and after the “Eleventh Five-Year Plan”, China’s environmental protection and ecological construction and restoration work will be fully carried out. Among them, water pollution control, air pollution, solid waste pollution, heavy metal pollution, radioactive pollution control, and desertified land control are environmental protection and ecological, one of the very important contents of environmental construction. The purpose of this article is to study the application of lake and wetland ecological restoration technology in environmental pollution control and ecological restoration. Commonly used domestic lake pollution treatment methods include: microbial method, dredging and salvage, chemical sedimentation (flocculation), physical measures (filtration and membrane), constructed wetland, reoxygenation (micropores, turbulent aeration), mechanical dilution transfer (flushing) Water, water change) etc. The microbiological method is to put in microorganisms, the use of microbial preparations can digest and degrade organic pollutants and remove the purification mechanism of ammonia nitrogen and phosphorus, so as to achieve the goal of various water pollution control. And its disadvantage is that it can’t last forever. Ecosystem restoration project: It is the process of using engineering technology to assist the restoration of an ecosystem that has been degraded, destroyed, newly built or rebuilt. Its application enables the ecosystem to be restored and strengthened in terms of its own health, integrity and sustainability. Once the ecological restoration project is completed, the ecosystem does not need to be maintained by humans, as long as it is prevented from degrading due to disturbance. This is similar to the microbiological method in the lake and wetland ecological restoration technology.
Interior Decoration Design and Construction Technology of Hardcover Room
Authors: He Jing
Published: October 2020

The interior decoration design and construction of hardcover room is to meet the needs of residents for safe, comfortable and warm living environment, so that residents can get a good living experience. The interior decoration and decoration of the hardcover room need to take full account of the individual needs of the residents, carry out the decoration design reasonably, and according to the design content, adopt the cash construction technology to create a good living environment for the residents. Based on this, this paper analyzes the needs of the household for the interior decoration of the hardcover room, and discusses the relevant points of interior decoration design and construction from the angles of safety, economy and individuation, so as to provide a new idea for the interior decoration design and construction of the hardcover room.
Research on Application of GIS Technology in Water Environment Planning of Basin
Authors: Quan Haobo , Wang Xue
Published: October 2020

Water environment is a typical public goods. When the market fails, government intervention is needed at this time. The local environmental protection department should strengthen supervision of enterprises, comprehensively investigate enterprises and factories in the river basin that do not meet environmental protection requirements and carry out rectification within a specified period of time for units that have not entered the unified sewage pipe network. At the same time, strengthen inspections and pay close attention to secret discharge and leakage. On the other hand, it is necessary to strengthen public supervision, establish and build a public participation mechanism and give full play to the consciousness and enthusiasm of the people, so as to stop and resist pollution and highlight the power of the public. At present, only relying on manual treatment can no longer meet the needs of river basin development. Especially after the completion of large-scale water resources network planning and construction, water basin planning has become an important problem that needs to be solved urgently. GIS technology integrates functions such as remote sensing mapping, terrain perception, etc. and has long been used in watershed planning in developed countries. This article analyzes it.
Research on Environmental Risk Control of Highly Intensive Agricultural Land Use Based on Computer Technology and Landscape Scale
Authors: Wang Mengwen
Published: October 2020

Under the background of China’s rigid population growth and the reduction of cultivated land area, the degree of agricultural intensification has been increasing. Pesticides and fertilizers have greatly increased crop yields. However, the large amount of agricultural chemicals input leads to the decline of soil and environmental quality. The environmental pollution caused by agricultural activities is increasing, especially in the high intensive agricultural areas with high land use intensity and a large amount of agricultural chemicals input. Agricultural land use is facing the dual challenges of ensuring food security and ecological environment security, which is an arduous and urgent task to realize the sustainable and healthy development of China’s agricultural countryside. High intensive agriculture gains higher economic benefits, but it also leads to serious environmental consequences. In the face of the increasingly serious problems of agricultural ecological environment, how to guarantee the economic development and control the environmental risk of agricultural land use is an urgent practical problem. Based on this, this paper uses computer technology to analyze the environmental risk control strategy of highly intensive agricultural land use based on the landscape scale.
Analysis of the Influence of Environmental Technology Factors on Landscape Design and Construction
Authors: Wang Ren
Published: October 2020

Landscape design and construction can reflect the economic and social development of a city. It is the external image of the city, adding color to the routine lives of people. In this paper, the current situation of urban landscape design is summarized. The influence of the environmental technology factors on urban landscape construction is analyzed, and the effective measures for controlling the effect of urban landscape are proposed.
Elimination of Cracks in GCr15 Bearing Rings After Heat Treatment
Authors: Feng Lei , Yu Jikun
Published: October 2020

The main chemical components of GCr15 bearing steel are Fe, Cr, C, Mn, etc., which are mainly used to produce bearing rings, rolling elements and other rolling bearing manufacturing industries. After more than one hundred years of development, GCr15 material is used for manufacturing bearing components, and it is called “heart of industry” because GCr15 material is one of the best quality steels [1]. After heat treatment, GCr15 material steel has the “most extensive” practicality for various working conditions of the bearing, such as high load capacity, good fatigue resistance, strong wear resistance, and high hardness, better temperature adaptability and so on [2]. This paper first discusses the heat treatment process of GCr15 material, and then analyzes and studies the cracking phenomenon of a certain batch of 1m diameter GCr15 material bearing ring blanks after heat treatment, and focuses on the fracture morphology, chemical composition, microstructure and other phenomena. The analysis found the cause of the crack and improved the original heat treatment process, that is, before quenching, isothermal spheroidizing annealing is used and the spheroidizing annealing temperature is strictly controlled, bainite austempering is used to replace martensite quench tempering after quenching, and finally, the problem is solved through experimental verification.
Analysis on the Development Status and Countermeasures of Fault Block Reservoir in Middle and Late Stage
Authors: Zhang Nan , Jia Jingfeng
Published: October 2020

China is a country with rich oil reserves. With the development of the reservoir, the proportion of fault block reservoir (hereinafter referred to as FBR) discovery increases gradually. At present, FBR has occupied a considerable proportion of China’s oil reserves. Zhongyuan Oilfield is mainly composed of complex FBR. FBR has unique characteristics, such as small fault block and complex geological structure, which will greatly increase the difficulty of development in the middle and late development. Therefore, we must comprehensively adjust and tap the potential of FBR, which will achieve long-term stable production in the middle and late stage of fault block oilfield. Therefore, based on the characteristics and classification of FBR, this paper analyzes the development status in the middle and late stage. Then, according to the characteristics of fault block oilfield in the middle and late stage, this paper puts forward some comprehensive adjustment technical measures, which will better adapt to the reasonable development mode of FBR in the middle and late stage.
Effect on Corrosion Property of Si in Mg-Al-RE Magnesium Alloy
Authors: Jiao Yufeng , Dou Yunhui , Hu Ming , Zhang Jie , He Lili , Xia Chunyan , Sun Jianbo , Zhang Jinghuai
Published: October 2020

Magnesium and magnesium alloys’ corrosion property is very terrible, Which limits the use of Magnesium and magnesium alloys. Thus, study the corrosion behavior and mechanism is important to improve the development of magnesium alloys’ industry. The study of Mg-Al-RE alloy(AE44, AE44-0.3Si) in simulating seawater with SEM, XRD, weight loss method, hydrogen evolution method, EIS, polarization curve and so on. We can know the microstructure, component and behavior of corrosion electrochemistry. Based on these data discuss corrosion mechanism. The results show as follows: AE44 alloy has terrible corrosion property in simulating seawater; AE44-0.3Si alloy by adding Si in AE44 alloy, Si eutectic react with Mg generates the second phase--Mg2Si phase. Mg2Si phase clustered at grain boundary or around grain boundary, which has mutual effect with dislocation, improve the corrosion property of Mg-Al-RE Alloy.
High Temperature Corrosion Protection of Heating Surface Metals of Waste Incineration Power Generation Boilers: A Review
Authors: Qu Zuopeng , Zhong Rigang , Wang Lei , Zhao Wenbo , Tian Xinli , Wang Haijun
Published: October 2020

Waste incineration power generation technology is the main trend in the treatment of urban solid waste. The thermal corrosion protection of boiler water-cooled walls and superheater tube walls is a key issue that restricts the stable operation of garbage incinerators. This article outlines typical surface protection technologies in the field of boiler high-temperature corrosion protection, including hardfacing, thermal spraying, remelting, etc. In addition, the characteristics of these anti-corrosion technologies were evaluated, and their application prospects were prospected. Hardfacing is widely used, but it is also facing the challenge of other methods; among the commonly used thermal spraying technologies, supersonic flame spraying is a more reliable technical solution; in laser remelting, high frequency induction remelting, flame remelting Among various remelting technologies such as melting and integral heating remelting, high-frequency induction remelting has shown great development potential.
Determination of Oxygen and Nitrogen in Zr-Based Amorphous Alloy by Inert Gas Fusion-Infrared Absorption/Thermal Conductivity Method
Authors: Ma Lan , Zhang Lijun , Lian Weijie , Zhai Yuxin
Published: October 2020

A Method was studied for determination of oxygen and nitrogen in Zr-based amorphous alloy by inert gas fusion-infrared absorption/thermal conductivity method, the optimum conditions were determined by experiments on the parameters such as crucible, sample weight and analysis power. When zirconium-based amorphous alloy is melted by heated crucible, the sample weight ranges between 0.07 g∼0.08 g, with analysis power is 6.0 KW; results will be stable and reliable. The relative standard deviation of the accuracy was between 1.13% and 3.47%, the relative standard deviation of the precision was between 0.67% and 4.92%. This method is quick and convenient, and the results are accurate and reliable, it can guarantee the quantitative determination of oxygen and nitrogen element in Zr-based amorphous alloy and guide the scientific research and production activities.
Study on Rapid Start-Up Technology Of Hydrolysis Acidification Process
Authors: Tang Jingpeng
Published: October 2020

Domestic sewage treatment plant is an important environmental unit in the city. The hydrolysis acidification process after the overhaul of the sewage treatment plant usually had a more than three-month’s slow started-up and run unstable, seriously affecting the daily operation and also existing big environmental risks. This paper mainly expounds the factors affecting rapid start-up such as the type of inoculating sludge, the amount of sludge, the hydraulic conditions and the bacteria start-up agent for hydrolytic acidifying bacteria. The start-up speed and operation effects of hydrolysis acidification process were improved by adjusting process parameters.
Effect of Mg on Microstructure and Mechanical Properties of Hypereutectic Al-25Si Alloy
Authors: Zhao Gaozhan , Chen Wen , Chai Shuxin , Li Ming , Tao Jianquan , Gao Shiqing
Published: October 2020

The effects of Mg Addition mode and amount on the microstructure and mechanical properties of hypereutectic Al-25Si alloy after modification were analyzed. The results show that the Mg2Si phase is relatively small, which is in the shape of granular or small bone, and has relatively little damage to the tissue; The hardness of the alloy is directly proportional to the amount of Mg added. When 1.5wt. % Mg is added, the microstructure and properties reach the best state. If the amount of Mg 2Si is excessive, it will gradually change into a coarse mesh, Chinese character shape and deteriorate the properties. The main reason is that there is a close adhesion growth relationship between Mg2Si and eutectic silicon. The modification and refinement lead to the lack of nucleation basement and the inhibition of growth of Mg2Si. At the same time, the modified residual AlP phase is used as the nucleation point. Mg2Si phase did not coarsen obviously, and other phases also maintained in a good shape.
A New Mode of Army Equipment Support
Authors: Jia Qi , Wang Tie-ning , Zhang Yi-chi
Published: October 2020

Firstly, it points out the problems in the mode of providing equipment for the Army, then analyzes the characteristics and advantages of cloud computing, constructs a cloud platform technology structure suitable for the Army, and combines the leading ideas of military and civilian integration to improve the supply system in a timely and efficient manner. It provides ideas for improving the construction of Army equipment and equipment support.
Long-Chain Alkyl Surfactant Assisted Preparation of Nano-Nickel Oxide via Hydrothermal Synthesis Method
Authors: Liu Longjiang , Zhou Mingshan , Huang Yao
Published: October 2020

The nano-NiO was prepared by hydrothermal synthesis method, using nickel sulfate hexahydrate as raw materials, urea as precipitant, and long chain alkyl ionic liquid 1-hexadecyl-3-methyl-midazolium chloride as surfactant, respectively. X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and other analytical methods were used to characterize the particle size, the phase and microstructure, and morphology of the prepared samples. Thermal stability of the samples was studied by thermogravimetry (TG). The molecular structure of nickel oxide was analysed by making use of the Fourier transform infrared spectroscopy (FT-IR). The results show that all the precursors synthesized via hydrothermal synthesis method were converted into NiO after sintering, and the obtained nano-NiO particles have good dispersibility and regular morphology, simultaneously possessing uniform size, and high purity. The samples prepared are belong to cubic structures with an average particle size of about 5-20 nm.
Optimum Asphalt Content of Hot Recycled Asphalt Mixture in Cold Area under Different Old Materials
Authors: Meng Yanyu , Zhang Jiaqi , Luo Zhan , Kong Liang , Gu Yuanyuan
Published: October 2020

In order to help the use of hot recycled asphalt mixture under different amount of used asphalt in cold areas of China. The optimum asphalt content of hot recycled asphalt mixture with different old materials was obtained by using Marshall Test method. By analyzing the material composition of hot recycled asphalt mixture in cold and cold areas, the optimum amount of asphalt with 70% old material in hot recycled asphalt mixture in cold area is 5.065%, the optimum amount of asphalt with 80% old material is 5.14%, and the optimum amount of asphalt with 80% old material is 5.2%. This study provides practical engineering for hot recycled asphalt mixture in cold area reference basis.