Electronic irradiation of TlInSxSe2−x (x = 1): Morphology, structure and raman scattering

2021 ◽  
Author(s):  
M. Yu. Tashmetov ◽  
F. K. Khallokov ◽  
N. B. Ismatov ◽  
I. I. Yuldashova ◽  
S. Kh. Umarov
Keyword(s):  
Surface Morphology ◽  
Single Crystal ◽  
Single Phase ◽  
Phase State ◽  
Monoclinic Structure ◽  
Average Value ◽  
Single Phase State ◽  
Before And After ◽  
Electronic Irradiation ◽  
The Difference

It is shown that the replacement of a part of sulfur atoms with selenium atoms in a TlInS2 single crystal stimulates the formation of a single-phase state with a monoclinic structure (space group [Formula: see text]/[Formula: see text] in TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]). Irradiation with 2 MeV electrons and a fluence of [Formula: see text] electron/cm2 of powder TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]) leads to an increase in the crystallite size from 56.5 nm to 65 nm, which is most likely associated with a decrease in the interface. The difference between the surface morphology of the synthesized TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]) single crystal and the surface morphology of the TlInS2 single crystal is established, which consists in a decrease in the height and width of the roughness in TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]). Irradiation of a TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]) single crystal with electrons with a fluence of [Formula: see text] electron/cm2 does not lead to a change in the height of the tubercle on its surface, and the average value of its width increases more than ten-fold. The identity of the peaks in the Raman spectra of the TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]) single crystal before and after its irradiation with electrons with an energy of 2 MeV and upto a fluence of [Formula: see text] electron/cm2, along with the absence of a shift of the peaks, indicates the radiation resistance of the TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]) single crystal.

Methods of Stabilization of Gas Condensates

2018 ◽  
Author(s):  
Ibukun Makinde
Keyword(s):  
Single Phase ◽  
Phase State ◽  
Liquid Mixtures ◽  
Gas Condensate ◽  
Liquid Hydrocarbons ◽  
Light Hydrocarbons ◽  
Natural Gases ◽  
Gas Condensates ◽  
Single Phase State

Gas condensates are liquid mixtures of high-boiling hydrocarbons of various structures, separated from natural gases during their production at gas condensate fields. When transporting gas through pipelines, the following gas quality conditions should be met:i.During transportation, gases should not cause corrosion of pipelines, fittings, instruments, etc.ii.The quality of the gas must ensure its transportation in a single-phase state i.e., liquid hydrocarbons, gas condensates and hydrates should not form in the pipelines.In order for gas condensates to meet the above-mentioned quality conditions during storage or transportation, they must be stabilized. Gas condensate stabilization is the process of “boiling off” light hydrocarbons from the condensate that would otherwise increase the vapor pressure when conditions are fluctuating.

scholarly journals An experimental and theoretical investigation of diffusion in a two-phase alloy

1948 ◽  
Vol 192 (1031) ◽  
pp. 575-592 ◽  
Keyword(s):  
Free Energy ◽  
Single Phase ◽  
Phase State ◽  
Theoretical Treatment ◽  
Research Association ◽  
Essential Difference ◽  
Two Phase ◽  
Two Factors ◽  
Order Of Magnitude ◽  
The Difference

The present paper describes an investigation of diffusion in the solid state. Previous experimental work has been confined to the case in which the free energy of a mixture is a minimum for the single-phase state, and diffusion decreases local differences of concentration. This may be called ‘diffusion downhill’. However, it is possible for the free energy to be a minimum for the two-phase state; diffusion may then increase differences of concentration; and so may be called ‘diffusion uphill’. Becker (1937) has proposed a simple theoretical treatment of these two types of diffusion in a binary alloy. The present paper describes an experimental test of this theory, using the unusual properties of the alloy Cu 4 FeNi 3 . This alloy is single phase above 800° C and two-phase at lower temperatures, both the phases being face-centred cubic; the essential difference between the two phases is their content of copper. On dissociating from one phase into two the alloy develops a series of intermediate structures showing striking X-ray patterns which are very sensitive to changes of structure. It was found possible to utilize these results for a quantitative study of diffusion ‘uphill’ and ‘downhill’ in the alloy. The experimental results, which can be expressed very simply, are in fair agreement with conclusions drawn from Becker’s theory. It was found that Fick’s equation, dc / dt = D d2c / dx2 , can, within the limits of error, be applied in all cases, with the modification that c denotes the difference of the measured copper concentration from its equilibrium value. The theory postulates that D is the product of two factors, of which one is D 0f the coefficient of diffusion that would be measured if the alloy were an ideal solid solution. The theory is able to calculate D/D 0 , if only in first approximation, and the experiments confirm this calculation. It was found that in most cases the speed of diffusion—‘uphill’ or ‘downhill’—has the order of magnitude of D 0 . * Now with British Electrical Research Association.

scholarly journals PENGARUH MODEL PEMBELAJARAN VAK (VISUALISASI, AUDITORI, KINESTETIK) TERHADAP PRESTASI BELAJAR PAI PADA SISWA DI SDN TLOGOMULYO TEMANGGUNG

2017 ◽  
Vol 11 (1) ◽  
pp. 53-64
Author(s):  
Kartika Hartanti
Keyword(s):  
Learning Model ◽  
Islamic Education ◽  
Class V ◽  
Learning Achievement ◽  
Significance Level ◽  
Average Value ◽  
Before And After ◽  
Post Test ◽  
Quasi Experimental ◽  
The Difference

This study aims to determine the effect of the application of VAK learning model on the learning achievement of PAI in class V Tlogomulyo Waterford Elementary School. This study was a quasi-experimental study (quasi-experimental). Subjects in this study consisted of 26 students of class V. The data was collected using VAK learning guidelines, test learning Islamic education, observation, documentation, and interviews. The validity of the instrument showing of 10 items proved to be valid all, are the results of the analysis show the reliability coefficient of 0.710 and otherwise reliable. Analysis of the data used in the form of comparative analysis using t-test. The results showed that there are significant implementation VAK learning model significantly to the learning outcomes of Islamic education. It can be seen from the difference in learning achievement Islam shortly before and after the given method VAK, the t value of 0.828 and significance level (p) of 0.05. In addition, an increase in the average acquisition value before application of VAK learning model (pre-test = 71.9) and after application of VAK learning model (post-test = 87.3). This shows an increase in the average value of 15.4. By looking at the difference in the score of the pre test and post test, shows that the VAK learning model is a model of effective learning for learning PAI.

scholarly journals Effect of Health Education Demonstration Method and Leaflet Media about Consciousness on Knowledge and Attitude of Hormonal KB Acceptors

2019 ◽  
Vol 7 (1) ◽  
pp. 60-67
Author(s):  
Sri Mulyati ◽  
Winancy Winancy
Keyword(s):  
Breast Cancer ◽  
Health Education ◽  
Hormonal Contraception ◽  
Average Value ◽  
Knowledge And Attitudes ◽  
A Value ◽  
Before And After ◽  
The Difference ◽  
Knowledge And Attitude ◽  
Self Examination

Breast cancer is a disease with characterized by uncontrolled development of cells and breast tissue. Women who has to use acceptors Hormonal contraception (Hormonal KB) has a risk of developing breast cancer. Self Breast Examination (BSE) or Periksa Payudara Sendiri (SADARI) is one of the easier and more efficient ways to be able to detect breast abnormalities by yourself. The purpose of the study was to determine the effect of health education by demonstration methods and leaflet media on breast self-examination of the knowledge and attitudes of WUS hormonal family planning acceptors about SADARI. This study was a quasi experiment: pretest-posttest design. The population was divided into 3 groups, namely groups given health education with leaflets, with demonstration methods, and a combination of leaflets + demonstrations. The results showed that the knowledge and attitudes of respondents before and after health education with leaflet media, demonstration methods, and leaflet + demonstration media combinations experienced a significant increase with a value of p <0.05 (p = 0,000). The increase score in the value of the average rating of knowledge was statistically significant in the demonstration group better than the leaflet group. The difference in the average value of the demonstration and demonstration group rankings + leaflets is not meaningful.  

scholarly journals Investigation and application of wellbore temperature and pressure field coupling with gas–liquid two-phase flowing

2021 ◽  
Author(s):  
Jie Zheng ◽  
Yihua Dou ◽  
Zhenzhen Li ◽  
Xin Yan ◽  
Yarong Zhang ◽  
...  
Keyword(s):  
Single Phase ◽  
Phase State ◽  
Pressure Field ◽  
Coupling Model ◽  
High Water ◽  
Two Phase ◽  
Gas Well ◽  
Single Phase State ◽  
Wellbore Temperature ◽  
Temperature And Pressure

AbstractWith the development of gas well exploitation, the calculation of wellbore with single-phase state affected by single factor cannot meet the actual needs of engineering. We need to consider the simulation calculation of complex wellbore environment under the coupling of multiphase and multiple factors, so as to better serve the petroleum industry. In view of the problem that the commonly used temperature and pressure model can only be used for single-phase state under complex well conditions, and the error is large. Combined with the wellbore heat transfer mechanism and the calculation method of pipe flow pressure drop gradient, this study analyzes the shortcomings of Ramey model and Hassan & Kabir model through transient analysis. Based on the equations of mass conservation, momentum conservation and energy conservation, and considering the interaction between fluid physical parameters and temperature and pressure, the wellbore pressure coupling model of water-bearing gas well is established, and the Newton Raphael iterative method is used for MATLAB programming. On this basis, the relationship between tubing diameter, gas production, gas–water ratio, and wellbore temperature field and pressure field in high water-bearing gas wells is discussed. The results show that the wellbore temperature pressure coupling model of high water-bearing gas well considering the coupling of gas–liquid two-phase flow wellbore temperature pressure field has higher accuracy than Ramey model and Hassan & Kabir model, and the minimum coefficients of variation of each model are 0.022, 0.037 and 0.042, respectively. Therefore, the model in this study is highly consistent with the field measured data. Therefore, the findings of this study are helpful to better calculate the wellbore temperature and pressure parameters under complex well conditions.

An Appearance of Heterogeneous Structure in a Single-Phase State of the Miscible PVME/PS Blends

1999 ◽  
Vol 32 (2) ◽  
pp. 537-540 ◽  
Author(s):  
Hiroshi Shimizu ◽  
Shin Horiuchi ◽  
Takeshi Kitano
Keyword(s):  
Single Phase ◽  
Phase State ◽  
Heterogeneous Structure ◽  
Single Phase State

The influence of mammaplasty on axillary lymphatic drainage patterns and sentinel lymph node detection: A 40-patient prospective study including the 20 first patients of the preliminary study.

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. e21056-e21056
Author(s):  
Eric Gremillet ◽  
Claude Soler ◽  
Catherine Bouteille ◽  
Aline Steiner ◽  
Benjamin Geissler
Keyword(s):  
Lymph Node ◽  
Sentinel Lymph Node ◽  
Prospective Study ◽  
Lymphatic Drainage ◽  
Average Value ◽  
Drainage Patterns ◽  
Before And After ◽  
Preliminary Study ◽  
The Difference ◽  
The Impact

e21056 Background: In the field of sentinel lymph node (SLN) for patients with previously breast surgery, opinions are not definitive. On the first hand, the ASCO in 2005 recommended that SLN biopsy should not be performed in patients with previous mammaplasty or axillary surgery, but, on the other hand, the same panelists of the ASCO guideline suggested that a preliminary lymphoscintigraphy (LSG) could be done when considering a SLN biopsy in patients with previous mammaplasty, with the objective of verifying the integrity of axillary nodes. We started a prospective study in January 2009, to evaluate the location of sentinel lymph node (SLN) before and after mammaplasty. The preliminary results of the first 20 patients were presented in June 2010 (Chicago, ASCO), however it was to be necessary to have more patients to validate these encouraging results. The results of additional study is presented here. Methods: 40 patients who underwent mammaplasty were evaluated by LSG acquired with a SPECT-CT immediately after intradermal periareolar injections of 99mTc -labelled sulphur colloid at two time points: before mammaplasty (Pre-LSG) and between 40 to 60 days after mammaplasty (Post- LSG). Results: The localisation of hot SN was evaluated as in the first study, using the SPECT-CT images : - antero-posterior distance was estimated in centimeter from SLN region to dorsal vertebrae spine center. - SLN’s coronal position was compared to rib cage. The average value of 40 antero-posterior distance before and after surgery was 14.2 vs 14.4 centimeters, in the preliminary study it was 13.6 vs 13.8 centimeters, the difference keeps the same between 2 studies (2 millimeters). As in the first study, SN was in the same position in relation to grill rib. The binomial test did not show statistical difference in lymphatic drainage patterns between Pre-LSG and Post-LSG. Conclusions: after evaluating the impact of the previous mammaplasty surgery on the SLN position, we observed that surgery did not modify lymphatic mapping and thus that it may be possible to propose SLN biopsy even after mammaplasty. This study confirms the results of our preliminary study.

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