The PFC2DSimulation of the Slope Stability

The main factors affecting landslide instability are landslides lithologic ,geological structure, topography, climate, hydrological conditions, earthquakes ,human and so on .The risk assessment of landslide is an effective method for analysis landslide stability ,but there has been little research for prediction of landslide in China .In this paper, particle flow procedures is used to analyze the landslide stability under natural conditions and forecast a possible landslide sliding surface ,and a scientific method will be provided for landslide prediction.

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A Wear Simulation of the Fixed Soft Abrasive Film Based on Discrete Element Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1017.452 ◽

2014 ◽

Vol 1017 ◽

pp. 452-457

Author(s):

Zhao Zhong Zhou ◽

Kai Ping Feng ◽

Ju Long Yuan

Keyword(s):

Element Model ◽

Discrete Element ◽

Particle Flow ◽

Particle Flow Code ◽

Discrete Element Model ◽

Optic Fiber ◽

Wear Property ◽

Factors Affecting ◽

Main Factors ◽

Simulation Results

A new polishing method by using fixed soft abrasive film is proposed to polish the end-face of the optic fiber connector. In order to study the wear property of the fixed soft abrasive film, the Particle Flow Code program was employed to simulate the interaction of surface topography. The discrete element model of the optic fiber connector and the fixed soft abrasive film were established. Through the interaction of the surface of two models, the process of contact and friction between the fixed soft abrasive film and the end-face of the optic fiber connector could be simulated. Simulation results showed that the main factors affecting the wear of the fixed soft abrasive film were pressure and speed, which mainly affected the normal stress and the tangential stress respectively. And the wear of the surface was mainly related to pressure and speed. The greater the speed and pressure were, the more serious wear of the fixed soft abrasive film was.

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Factors affecting the decision for routine health checkup: evidence from survey data in Khanh Hoa province

Science & Technology Development Journal - Economics - Law and Management ◽

10.32508/stdjelm.v4i4.676 ◽

2020 ◽

Vol 4 (4) ◽

pp. First

Author(s):

Phạm Thành Thái ◽

Võ Chí Nam

Keyword(s):

Survey Data ◽

Scientific Method ◽

Education Level ◽

Health Checkup ◽

Factors Affecting ◽

Logit Regression ◽

The World ◽

Main Factors ◽

Logit Regression Model ◽

The Impact

Routine health checkup is the simplest and most scientific method for early detection, minimizing harm, and preventing complications of diseases. However, until now, only a fraction of the population is aware of its importance. Studies in the world and in Vietnam show that the proportion of the population having routine health checkups remains modest. Understanding which factors affect the decision to have routine health checkups is important in creating a system and environment that encourage people to have regular health checkups. The study is based on the survey data of 420 people in Khanh Hoa province to identify the main factors affecting their decision of routine health checkups, using the Logit regression model. The results shows that factors affecting decisions on routine health checkups include: education level, occupation, income, age, chronic illness, waiting time, and the impact of cost. The study also determines that gender and marital status have no effect on regular health checkups. The results highlight the importance of taking into consideration the priorities of time and cost when developing policies to encourage regular health checkups in the population.

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Recent Rapid Climate Changes in Antarctic and their Influence on Low Diversity Ecosystems

Papers on Global Change IGBP ◽

10.2478/v10190-010-0002-6 ◽

2010 ◽

Vol 17 (1) ◽

pp. 17-30 ◽

Cited By ~ 1

Author(s):

Katarzyna J. Chwedorzewska

Keyword(s):

Environmental Variables ◽

Climate Changes ◽

Biological Significance ◽

Global Changes ◽

Factors Affecting ◽

Low Diversity ◽

Main Factors ◽

The Antarctic ◽

High Diversity ◽

Temperature Water

ABSTRACTThe geographic position, astronomic factors (e.g. the Earth’s maximum distance from the Sun during winter), ice cover and altitude are the main factors affecting the climate of the Antarctic, which is the coldest place on Earth. Parts of Antarctica are facing the most rapid rates of anthropogenic climate change currently seen on the planet. Climate changes are occurring throughout Antarctica, affecting three major groups of environmental variables of considerable biological significance: temperature, water, UV-B radiation.Low diversity ecosystems are expected to be more vulnerable to global changes than high diversity ecosystems

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Pitting Corrosion of Biomedical Titanium and Titanium Alloys: A Brief Review

Current Nanoscience ◽

10.2174/1573413716999201125221211 ◽

2020 ◽

Vol 16 ◽

Author(s):

Yu-Wei Cui ◽

Liang-Yu Chen ◽

Xin-Xin Liu

Keyword(s):

Corrosion Resistance ◽

Pitting Corrosion ◽

Potential Temperature ◽

Growth Stages ◽

Factors Affecting ◽

Ti Alloys ◽

Pitting Corrosion Resistance ◽

Superior Mechanical Properties ◽

Good Biocompatibility ◽

Main Factors

Abstract:: Thanks to their excellent corrosion resistance, superior mechanical properties and good biocompatibility, titanium (Ti) and Ti alloys are extensively applied in biomedical fields. Pitting corrosion is a critical consideration for the reliability of Ti and Ti alloys used in the human body. Therefore, this article focuses on the pitting corrosion of Ti and Ti alloys, which introduces the growth stages of pitting corrosion and its main influencing factors. Three stages, i.e. (1) breakdown of passive film, (1) metastable pitting, and (3) propagation of pitting, are roughly divided to introduce the pitting corrosion. As reviewed, corrosive environment, applied potential, temperature and alloy compositions are the main factors affecting the pitting corrosion of Ti and Ti alloys. Moreover, the pitting corrosion of different types Ti alloys are also reviewed to correlate the types of Ti alloys and the main factors of pitting corrosion. Roughly speaking, β-type Ti alloys have the best pitting corrosion resistance among the three types of Ti alloys.

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Measuring the Efficiency of Football Clubs Using Data Envelopment Analysis: Empirical Evidence From Spanish Professional Football

SAGE Open ◽

10.1177/2158244021989257 ◽

2021 ◽

Vol 11 (1) ◽

pp. 215824402198925

Author(s):

Isidoro Guzmán-Raja ◽

Manuela Guzmán-Raja

Keyword(s):

Data Envelopment Analysis ◽

High Efficiency ◽

Sport Performance ◽

Data Envelopment ◽

Professional Football ◽

Efficiency Measure ◽

Factors Affecting ◽

Football Clubs ◽

Main Factors ◽

Using Data

Professional football clubs have a special characteristic not shared by other types of companies: their sport performance (on the field) is important, in addition to their financial performance (off the field). The aim of this paper is to calculate an efficiency measure using a model that combines performance (sport and economic) based on data envelopment analysis (DEA). The main factors affecting teams’ efficiency levels are investigated using cluster analysis. For a sample of Spanish football clubs, the findings indicate that clubs achieved a relatively high efficiency level for the period studied, and that the oldest teams with the most assets had the highest efficiency scores. These results could help club managers to improve the performance of their teams.

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Enzymatic Process for Cystoseira barbata Valorization: Ethanol Production and Additional By-Products

Processes ◽

10.3390/pr9050741 ◽

2021 ◽

Vol 9 (5) ◽

pp. 741

Author(s):

Doinita-Roxana Cioroiu Tirpan ◽

Ancaelena Eliza Sterpu ◽

Claudia Irina Koncsag ◽

Alina Georgiana Ciufu ◽

Tănase Dobre

Keyword(s):

Ethanol Production ◽

Alcoholic Fermentation ◽

Ethanol Yield ◽

Product Yield ◽

Liquid Ratio ◽

Experimental Conditions ◽

Factors Affecting ◽

Cystoseira Barbata ◽

Main Factors ◽

Process Factors

The aim of this study is to evaluate the potential of dried Cystoseira barbata alga for ethanol production through alcoholic fermentation. The influence of the main factors affecting the fermentation are studied in the frame of a 23 factorial experimental plan. The main factors influencing the process are the fermentation temperature (t from 25 °C to 35 °C), the solid to liquid ratio (S/L from 0.040 g/g to 0.080 g/g), and the cellulase ratio (R from 8 U/g d.m to 16 U/g d.m.). The maximum volatile compounds yield of 0.2808 g/g d.m and ethanol yield of 0.0158 g/g d.m were favored by the following experimental conditions: process temperature of 35 °C, solid to liquid ratio of 0.0415, and enzyme ratio of 16 U/g d.m. A statistical model was used to correlate the product yield with the process factors. Additionally, 19 interesting bioactive compounds were found in the enzymatic hydrolysis and alcoholic fermentation broths which seem likely to maintain natural defence mechanisms against diseases and physical disorders.

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The role of serum β-trophin and endostatin in patients with polycystic ovary syndrome: Are they correlated?

BMC Women s Health ◽

10.1186/s12905-021-01198-4 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Wei Gong ◽

Aikmu Bilixzi ◽

Xinmei Wang ◽

Yanli Lu ◽

Li Wan ◽

...

Keyword(s):

Polycystic Ovary Syndrome ◽

Influencing Factors ◽

Polycystic Ovary ◽

Pearson Correlation ◽

Healthy Controls ◽

Newly Diagnosed ◽

Ovary Syndrome ◽

Factors Affecting ◽

Main Factors

Abstract Background It’s necessary to investigate the serum β-trophin and endostatin (ES) level and its influencing factors in patients with newly diagnosed polycystic ovary syndrome (PCOS). Methods Newly diagnosed PCOS patients treated in our hospital were selected, and healthy women who took physical examination during the same period as healthy controls. We detected and compared the related serum indicators between two groups, Pearson correlation were conducted to identify the factors associated with β-trophin and ES, and the influencing factors of β-trophin and ES were analyzed by logistic regression. Results A total of 62 PCOS patients and 65 healthy controls were included. The BMI, WHI, LH, FSH, TT, FAI, FBG, FINS, HOMA-IR, TC, TG, LDL, ES in PCOS patients were significantly higher than that of healthy controls, while the SHBG and HDL in PCOS patients were significantly lower than that of healthy controls (all p < 0.05). β-trophin was closely associated with BMI (r = 0.427), WHR (r = 0.504), FBG (r = 0.385), TG (r = 0.405) and LDL (r = 0.302, all p < 0.05), and ES was closely associated with BMI (r = 0.358), WHR (r = 0.421), FBG (r = 0.343), TC (r = 0.319), TG (r = 0.404, all p < 0.05). TG, BMI, WHR and FBG were the main factors affecting the serum β-trophin levels (all p < 0.05). FBG, TC and BMI were the main factors affecting the serum ES levels (all p < 0.05). The TG, β-trophin, ES level in PCOS patients with insulin resistance (IR) were significantly higher than that of those without IR (all p < 0.05). Conclusion Increased β-trophin is closely associated with increased ES in patients with PCOS, which may be the useful indicators for the management of PCOS.

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Laboratory Tests on Engineering Properties of Wind-Blown Sand

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.170-173.706 ◽

2012 ◽

Vol 170-173 ◽

pp. 706-709

Author(s):

Zhao Lin Jia ◽

Shu Wang Yan ◽

Zhi Liang Huo

Keyword(s):

Water Content ◽

Laboratory Tests ◽

Fine Sand ◽

Engineering Properties ◽

Grain Composition ◽

Factors Affecting ◽

Compaction Curve ◽

Main Factors ◽

Dry And Wet Conditions ◽

Compaction Properties

By means of laboratory tests and theoretical calculation, the physical, mechanical properties and compaction mechanism of the wind-blown sand are studied to deal with the problem of how to use the wind-blown sand as roadbed materials. It is revealed that water content doesn’t affect the compressibility and the shear strength of the wind-blown sand obviously and the wind-blown sand can be compacted both in dry and wet conditions. The compaction curve of the ordinary fine sand is consistent with that of wind-blown sand and the main factors affecting the compaction properties are the grain composition, water content and compaction work.

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