scholarly journals Positron annihilation in simple condensed gases

1990 ◽  
Vol 68 (12) ◽  
pp. 1362-1376 ◽  
Author(s):  
A. T. Stewart ◽  
C. V. Briscoe ◽  
J. J. Steinbacher
Keyword(s):  
Positron Annihilation ◽  
Reasonable Agreement ◽  
Theoretical Calculations ◽  
Bubble Formation ◽  
The Self ◽  
Correlation Technique ◽  
Potential Well ◽  
Well Model ◽  
Adequate Data ◽  
Solid He

The angular-correlation technique of positron annihilation has been used to detect and measure the localized bubble state of positronium (Ps) in liquid Ne, Ar, Kr, H2, and N2 and in liquid and solid He at various pressures and temperatures. No bubble state was seen in liquid O2 or in solid Ne and Ar. The dynamics of bubble formation is not yet understood. In the cases where theoretical calculations, and adequate data, exist, viz. He, Ar, and H2, there is reasonable agreement for the momentum of the photons from the annihilation of positrons with the outer electrons of these atoms. The Ps annihilations from the self-trapped bubble state are reasonably well described in terms of a simple finite potential-well model.

Temperature dependence of the optical properties in p-Cd0.96Zn0.04Te single crystals

2001 ◽  
Vol 16 (8) ◽  
pp. 2196-2199 ◽  
Author(s):  
H. Y. Lee ◽  
T. W. Kang ◽  
T. W. Kim
Keyword(s):  
Optical Properties ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Reasonable Agreement ◽  
Theoretical Calculations ◽  
Optoelectronic Devices ◽  
Activation Energies ◽  
Acoustic Parameters ◽  
Longitudinal Acoustic ◽  
Pl Spectra

Photoluminescence (PL) measurements were performed on p-Cd0.96Zn0.04Te single crystals to investigate the dependence of the excitons on temperature. The activation energies and the longitudinal acoustic parameters of the excitons were determined from the temperature dependence of the PL spectra and were in reasonable agreement with the theoretical calculations. These results can help improve understanding for the application of p-CdxZn1–xTe single crystals in optoelectronic devices.

scholarly journals STM study on the self-assembly of oligothiophene-based organic semiconductors

2011 ◽  
Vol 2 ◽  
pp. 802-808 ◽  
Author(s):  
Elena Mena-Osteritz ◽  
Marta Urdanpilleta ◽  
Erwaa El-Hosseiny ◽  
Berndt Koslowski ◽  
Paul Ziemann ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Self Assembly ◽  
Theoretical Calculations ◽  
The Self ◽  
Scanning Tunneling ◽  
Ambient Conditions ◽  
Tunneling Microscopy ◽  
Substitution Pattern ◽  
Electronic Density ◽  
The Individual

The self-assembly properties of a series of functionalized regioregular oligo(3-alkylthiophenes) were investigated by using scanning tunneling microscopy (STM) at the liquid–solid interface under ambient conditions. The characteristics of the 2-D crystals formed on the (0001) plane of highly ordered pyrolitic graphite (HOPG) strongly depend on the length of the π-conjugated oligomer backbone, on the functional groups attached to it, and on the alkyl substitution pattern on the individual thiophene units. Theoretical calculations were performed to analyze the geometry and electronic density of the molecular orbitals as well as to analyze the intermolecular interactions, in order to obtain models of the 2-D molecular ordering on the substrate.

scholarly journals SELF-REGULATION AND FEAR OF MISSING OUT (FOMO) ON COLLEGE STUDENTS INSTAGRAM USERS

2021 ◽  
Vol 3 (2) ◽  
pp. 61-64
Author(s):  
Su warti ◽  
Hana Ayu Amalia
Keyword(s):  
College Students ◽  
Self Regulation ◽  
Test Validity ◽  
The Self ◽  
Reliability Test ◽  
Correlation Technique ◽  
Validity Test ◽  
Fear Of Missing Out ◽  
Correlation Result ◽  
The Relationship

This study aims to test the relationship between self-regulation and Fear of Missing Out (FoMO). This research was conducted on 100 college students of Universitas Muhammadiyah Purwokerto, Indonesia, from representatives of 11 faculties. The data collection method used the FoMO scale and the self-regulation scale. The reliability test used Cronbach’s alpha, and the validity test used the product-moment correlation technique. Validity Test uses product-moment correlation technique, while Reliability Test uses alpha Cronbach. Test validity with N = 40 and table = 0.312 (p=0.05). FoMO scale of 40 items. There were 31 valid items and nine deciduous items moving from 0.334 to 0.715 with a reliability of 0.916. At the same time, the scale of self-regulation is as much as 50 items. There were 38 valid items and 12 deciduous items moving from 0.316 to 0.704 with reliability of 0.925. Based on the results of the study obtained Fcount = 0.739 with Ftable=1.69 (F count < Ftable) and r count = -0.595 with p = 0.000 (p < 0.05) so based on the results of the analysis that there is a significant relationship between FoMO and self-regulation in students Instagram users at Universitas Muhammadiyah Purwokerto, Indonesia. The correlation result indicates a negative value, meaning the higher the self-regulation, the lower the FoMO, or the lower the self-regulation, the higher the FoMO. Then obtained the value of coefficient self-regulation variable determination against FoMO of 35.4%

scholarly journals A Novel Type of Stochastic Resonance Potential Well Model and Its Application

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 160191-160202 ◽  
Author(s):  
Shangbin Jiao ◽  
Shuang Lei ◽  
Wei Jiang ◽  
Qing Zhang ◽  
Weichao Huang
Keyword(s):  
Stochastic Resonance ◽  
Potential Well ◽  
Well Model

scholarly journals Fusing N-heteroacene analogues into one “kinked” molecule with slipped two-dimensional ladder-like packing

2016 ◽  
Vol 7 (2) ◽  
pp. 1309-1313 ◽  
Author(s):  
Jing Zhang ◽  
Chengyuan Wang ◽  
Guankui Long ◽  
Naoki Aratani ◽  
Hiroko Yamada ◽  
...  
Keyword(s):  
Charge Transport ◽  
Theoretical Calculations ◽  
Hole Mobility ◽  
Two Dimensional ◽  
Potential Well

An unexpected N-heteroacene with a slipped two-dimensional ladder-like packing feature shows a hole mobility up to 0.3 cm2 V−1 s−1, while theoretical calculations suggest that this compound possesses potential well-balanced ambipolar charge-transport characteristics.

Parameter-Induced Stochastic Resonance in Wireless Sensor Network Signal Processing

2010 ◽  
Vol 121-122 ◽  
pp. 646-650
Author(s):  
Zi Kai Zhao ◽  
Guo Hua Hui
Keyword(s):  
Signal Processing ◽  
Wireless Sensor Network ◽  
Sensor Network ◽  
Stochastic Resonance ◽  
Noise Intensity ◽  
System Parameter ◽  
Wireless Sensor ◽  
Potential Well ◽  
Processing Level ◽  
Well Model

Parameter-induced stochastic resonance (PSR) using double potential well model was focused in this paper. Based on the former stochastic resonance study, system parameter µ was used to explore the resonance characteristics. A bluetooth-based wireless sensor network (WSN) was adopted to obtain the experimental data for parameter-induced stochastic resonance simulating. Under fixed noise intensity range, the changes of system parameter µ led to a systematic output resonance. Simulating results demonstrated that the systematic parameter µ could lead to stochastic resonance at signal processing level.

ON THE FLUCTUATION-RESPONSE RELATION IN GEOPHYSICAL SYSTEMS

2009 ◽  
Vol 23 (28n29) ◽  
pp. 5515-5529 ◽  
Author(s):  
GUGLIELMO LACORATA ◽  
ANDREA PUGLISI ◽  
ANGELO VULPIANI
Keyword(s):  
Dynamical System ◽  
Complex Systems ◽  
Greenhouse Gas ◽  
Climate Dynamics ◽  
Climate Modelling ◽  
Potential Well ◽  
Gas Concentration ◽  
Well Model ◽  
Major Interest ◽  
Lorenz 96

One of the major issues concerning the study of a dynamical system is the response to perturbations. In climate dynamics, for example, it is of major interest to understand how a given variable, e.g., the temperature, is sensitive to alterations of some other component of the system, e.g., the greenhouse gas concentration. We review the connection between equilibrium and non-equilibrium properties, also known as Fluctuation-Relaxation Relation, and its main aspects in chaotic and turbulent systems. We consider, in particular, the effects of the fast variables on the slow variables in a multiscale system, as far as the sensitivity properties are concerned. Two examples about (widely speaking) climate modelling are discussed: the Lorenz-96 model and the double-potential well model. Both of them, despite their apparent simplicity, hide the same kind of interesting features of much more complex systems.

Influence of Cracks on Frequency of the Self-Vibration of Reinforced Concrete T Beam of Road Bridges

2019 ◽  
Vol 828 ◽  
pp. 9-13 ◽  
Author(s):  
Artashes Sargsyan ◽  
Grigor Sargsyan ◽  
Boris Resnik
Keyword(s):  
Reinforced Concrete ◽  
Health Monitoring ◽  
Theoretical Calculations ◽  
Health Condition ◽  
The Self ◽  
Correct Evaluation ◽  
Bridge Health Monitoring ◽  
Structure Vibration ◽  
Different Characteristics ◽  
T Beam

The main goal of bridge health monitoring is to show the condition of structure in real time mode with using special sensors, which can measure different characteristics, which can indicate about the changes in structure. One of the easier measured indicators what can be used is frequency of structure vibration. The diagnostic of the health condition of structure is dependent of correct evaluation of changes range of measured indicators. This paper presents the theoretical calculations to study the effect of cracking on the frequency response of typical reinforced concrete T type beams which has widespread in road bridges construction.

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