scholarly journals Barriers Everyone: A New Method for Multiscale Analysis of Barriers Using the Barrier Index

2021 ◽  
Vol 29 (4) ◽  
pp. 292-305
Author(s):  
Domen Kušar ◽  
Blaž Komac
Keyword(s):  
Influencing Factors ◽  
Multiscale Analysis ◽  
New Method ◽  
Family Structures ◽  
Underlying Causes ◽  
Geographic Regions ◽  
Different Thickness

Abstract The Barrier Index is presented in this contribution. The index shows the extent to which spatial units of different sizes are closed off by barriers, influencing society by the different “thickness” and “thinness” of boundaries. The article defines the Index and compares land units with barriers in various details. The calculations were made for spatial units from the scale of parcels to one-hectare areas in selected types of regions, selected geographic regions, and border barriers in selected countries. The Index is useful for crossscale analysis and for identifying the underlying causes and relationships within different cultural, social, and geographical contexts. The example of spatially persistent family structures was used to highlight the underpinning influencing factors that connect the building of barriers at different scales.

Uniform flower-like BiOBr/BiOI prepared by a new method: visible-light photocatalytic degradation, influencing factors and degradation mechanism

2019 ◽  
Vol 43 (37) ◽  
pp. 14829-14840 ◽  
Author(s):  
Jianhui Li ◽  
Quan Zhou ◽  
Fan Yang ◽  
Lijie Wu ◽  
Wenying Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Influencing Factors ◽  
Solvothermal Method ◽  
Degradation Mechanism ◽  
Degradation Efficiency ◽  
New Method ◽  
Molar Ratios ◽  
One Step ◽  
Visible Light Photocatalytic

BiOBr/BiOI photocatalyst with different molar ratios was synthesized via a simple one-step solvothermal method. The uniform flower-like BiOBr/BiOI (3 : 1) owns high photocatalytic degradation efficiency, excellent recyclability and stability.

scholarly journals Orientation Identification of the Black Phosphorus with Different Thickness Based on B2g Mode Using a Micro-Raman Spectroscope under a Nonanalyzer Configuration

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5572
Author(s):  
Rubing Li ◽  
Yongchao Shang ◽  
Huadan Xing ◽  
Xiaojie Wang ◽  
Mingyuan Sun ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Research Field ◽  
Black Phosphorus ◽  
New Method ◽  
Important Condition ◽  
Crystalline Orientation ◽  
Parallel Polarization ◽  
Good Consistency ◽  
Non Destructive ◽  
Different Thickness

As an anisotropic material, the unique optoelectronic properties of black phosphorus are obviously anisotropic. Therefore, non-destructive and fast identification of its crystalline orientation is an important condition for its application in optoelectronics research field. Identifying the crystalline orientation of black phosphorus through Ag1 and Ag2 modes under the parallel polarization has high requirements on the Raman system, while in the nonanalyzer configuration, the crystalline orientation of the thick black phosphorus may not be identified through Ag1 and Ag2 modes. This work proposes a new method to identify the crystalline orientation of black phosphorus of different thicknesses. This method is conducted under the nonanalyzer configuration by B2g mode. The results show that B2g mode has a good consistency in the identification of crystalline orientations. In this paper, a theoretical model is established to study the angle-resolved Raman results of B2g mode. The new method can accurately identify the crystalline orientation with different layers of black phosphorus without misidentification.

DETERMINATION OF PHYSICAL QUANTITIES FOR PIXE BY MEANS OF PIXE 1: ABSORPTION CURVE

1994 ◽  
Vol 04 (02n03) ◽  
pp. 165-179 ◽  
Author(s):  
K. SERA ◽  
S. FUTATSUGAWA ◽  
S. HATAKEYAMA ◽  
S. SAITOU
Keyword(s):  
Background Subtraction ◽  
New Method ◽  
Absorption Curve ◽  
X Rays ◽  
Pixe Analysis ◽  
Peak Areas ◽  
Physical Quantities ◽  
Different Thickness ◽  
Good Agreement

A new method has been developed to determine absorption curves which are needed to derive quantitative values in PIXE analysis. In this method two spectra obtained with absorbers of different thickness are divided by each other after background subtraction and the absorption curve can be obtained immediately. Absorption curves for a 50 and a 200 µm-thick Mylar films and that for a Cr foil of 2500 µg/cm2 were determined experimentally. These curves are in good agreement with the absorption values derived from peak areas of characteristic x-rays. This method enables one to obtain absorption curves for any kind of absorber accurately and quickly.

A New Method for Rapid Detection of Formaldehyde in Textiles

2013 ◽  
Vol 821-822 ◽  
pp. 402-406
Author(s):  
Ke Jie Fu ◽  
Qi Bei Bao ◽  
Yun Feng ◽  
Li Sheng Yang ◽  
Chang Sheng Feng ◽  
...  
Keyword(s):  
Influencing Factors ◽  
Rapid Detection ◽  
Condensation Reaction ◽  
Chemical Compounds ◽  
New Method ◽  
Formaldehyde Solution ◽  
Potassium Periodate ◽  
Specimen Extraction ◽  
Formaldehyde Content

a new method for rapid detection of formaldehyde has been developed in this research. Under this method, the formaldehyde solution has condensation reaction with 4-amino-3-hydrazine-5-mercapto-1,2,4-triazole (AHMT) and is oxidized by potassium periodate to produce purple chemical compounds. The method for rapid detection of the formaldehyde content in textiles has been optimized after researching primary influencing factors and considering the specimen extraction effect in GB/T 2912.1-2009.This method is sensitive, accurate and fast, taking only 12.5min, 9.6 times faster than the method provided in GB/T 2912.1-2009.

scholarly journals Determination of Cysteine by Discoloration Spectrophotometry using Copper(II)-Bis-Cyclohexanone Oxalydihydrazone

2021 ◽  
Vol 245 ◽  
pp. 03023
Author(s):  
Changqing Tu ◽  
Xinrong Wen
Keyword(s):  
Linear Relationship ◽  
Correlation Coefficient ◽  
Influencing Factors ◽  
Alkaline Medium ◽  
Linear Correlation ◽  
Mass Concentration ◽  
New Method ◽  
Chromogenic Reagent ◽  
Maximum Absorption Wavelength

In the alkaline medium of pH=9.18, Cu2+ can be reduced to Cu+ by the sulfhydryl (-SH) of cysteine, and it result in the decrease the amount of Cu2+ in the system. The decrement of Cu2+ is directly proportional to the addition of cysteine, then using bis-cyclohexanone oxalyldihydrazone (BCO) as chromogenic reagent for Cu2+ to determinate the content of cysteine indirectly by discoloration spectrophotometry. A new method for the determination of cysteine by discoloration spectrophotometry using Copper(II)-BCO has been established. The influencing factors of the determination of cysteine is investigated. The results show that the maximum absorption wavelength of chromogenic system was 602 nm, in the range of 0.008000~0.06800 mg/mL, the linear relationship between the decrease of absorbance and the mass concentration of methimazol is A=0.2162+2.4824C (mg/mL), and the linear correlation coefficient is r=0.9959. The method has been applied to the determination of cysteine in food, and the results are basically consistent with those determined by pharmacopoeial method.

Study on the Defluorinated Materials of High Fluoride

2012 ◽  
Vol 535-537 ◽  
pp. 2195-2200
Author(s):  
Rui Yang Chen ◽  
Zhan Shi ◽  
Zhen Bin Zhang ◽  
Miao Liu
Keyword(s):  
Drinking Water ◽  
Influencing Factors ◽  
Treatment Condition ◽  
Removal Rate ◽  
New Method ◽  
Proper Treatment ◽  
High Fluoride

In our country, high fluoride containing groundwater is general. Now,there have been some study on fluoride containing groundwater, but MgSO4 is the first use. In this paper,therefore,study a new method for removing fluorine from groundwater with MgSO4 , CaO powder regulate pH, studies the influencing factors of fluorine removal rate, such as pH,temperature and so on, obtain the proper treatment condition:8% MgSO4 solution 10ml, CaO powder regulate pH11,stir 5min at 40°C. Using this method, the concentration of fluorine ion in the groundwater is lower than the national provided drinking water criterion of <1.0mg/L, fluorine removal rate reach 93%.

SECOND PEAK IN AC LOSSES OF Bi2Sr2Ca1Cu2Ox TAPES

1996 ◽  
Vol 10 (25) ◽  
pp. 1245-1260 ◽  
Author(s):  
P.N. MIKHEENKO ◽  
M. IONESCU ◽  
J. HORVAT ◽  
S.X. DOU
Keyword(s):  
Finite Size ◽  
Broad Peak ◽  
New Method ◽  
Ac Losses ◽  
Transition Temperatures ◽  
Different Thickness ◽  
Second Peak

An additional broad peak in AC losses of Bi 2 Sr 2 Ca 1 Cu 2 O x tapes is observed. Using a new method based on the model of separated finite-size stacks of superconducting layers it is found that this peak reflects the presence of Bi 2 Sr 2 CuO x intergrowth in the sample. Kosterlitz-Thouless transition temperatures of pure Bi 2 Sr 2 Ca 1 Cu 2 O x and intergrowths of different thickness are defined. Our results are confirmed by the direct TEM measurements.

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