Investigation of the effect of the scintillator material on the overall X-ray detection system performance by application of analytical models

Laboratory x-ray fluorescence holography equipment was developed. A single-bent graphite monochromator with a large curvature and a high-count-rate x-ray detection system were applied in this equipment. To evaluate the performance of this equipment, a hologram pattern of a gold single crystal was measured. It took two days, which was about one-third the time required for the previous measurements using the conventional x-ray source and several times that using the synchrotron source. The quality of the hologram pattern is as good as that obtained using the synchrotrons. Clear atomic images on (002) are reconstructed.

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An Indonesian Hoax News Detection System Using Reader Feedback and Naïve Bayes Algorithm

Cybernetics and Information Technologies ◽

10.2478/cait-2020-0006 ◽

2020 ◽

Vol 20 (1) ◽

pp. 82-94

Author(s):

Badrus Zaman ◽

Army Justitia ◽

Kretawiweka Nuraga Sani ◽

Endah Purwanti

Keyword(s):

Performance Evaluation ◽

System Performance ◽

Naive Bayes ◽

Detection System ◽

Naïve Bayes ◽

Bayes Algorithm ◽

F Measure ◽

System Performance Evaluation

AbstractHoax news in Indonesia spread at an alarming rate. To reduce this, hoax news detection system needs to be created and put into practice. Such a system may use readers’ feedback and Naïve Bayes algorithm, which is used to verify news. Overtime, by using readers’ feedback, database corpus will continue to grow and could improve system performance. The current research aims to reach this. System performance evaluation is carried out under two conditions ‒ with and without sources (URL). The system is able to detect hoax news very well under both conditions. The highest precision, recall and f-measure values when including URL are 0.91, 1, and 0.95 respectively. Meanwhile, the highest value of precision, recall and f-measure without URL are 0.88, 1 and 0.94, respectively.

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Using Bayesian Model Selection to Advise Neutron Reflectometry Analysis from Langmuir-Blodgett Monolayers

10.26434/chemrxiv.10028978.v1 ◽

2019 ◽

Author(s):

Andrew McCluskey ◽

Tom Arnold ◽

Joshaniel F. K. Cooper ◽

Tim Snow

Keyword(s):

Experimental Data ◽

Soft Matter ◽

General Framework ◽

Neutron Reflectometry ◽

Analytical Models ◽

Colloid Interface ◽

X Ray ◽

Langmuir Blodgett ◽

Generic Framework

The analysis of neutron and X-ray reflectometry data is important for the study of interfacial soft matter structures. However, there is still substantial discussion regarding the analytical models<br>that should be used to rationalise relflectometry data. In this work, we outline a robust and generic framework for the determination of the evidence for a particular model given experimental data, by<br>applying Bayesian logic. We apply this framework to the study of Langmuir-Blodgett monolayers by considering three possible analytical models from a recently published investigation [Campbell et al., J. Colloid Interface Sci, 2018, 531, 98]. From this, we can determine which model has the most evidence given the experimental data, and show the effect that different isotopic contrasts of neutron reflectometry will have on this. We believe that this general framework could become an important component of neutron and X-ray reflectometry data analysis, and hope others more regularly consider the relative evidence for their analytical models.<br>

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Integer arithmetic approximation of the hog algorithm used for pedestrian detection

Computer Science and Information Systems ◽

10.2298/csis160229011s ◽

2017 ◽

Vol 14 (2) ◽

pp. 329-346 ◽

Cited By ~ 4

Author(s):

Srdjan Sladojevic ◽

Andras Anderla ◽

Dubravko Culibrk ◽

Darko Stefanovic ◽

Bojan Lalic

Keyword(s):

Classification Accuracy ◽

System Performance ◽

Detection System ◽

Pedestrian Detection ◽

Lessons Learned ◽

People Detection ◽

Algorithm Performance ◽

Integer Arithmetic ◽

Point Arithmetic ◽

Angle Calculation

This paper presents the results of a study of the effects of integer (fixed-point) arithmetic implementation on classification accuracy of a popular open-source people detection system based on Histogram of Oriented Gradients. It is investigated how the system performance deviates from the reference algorithm performance as integer arithmetic is introduced with different bit-width in several critical parts of the system. In performed experiments, the effects of different bit-width integer arithmetic implementation for four key operations were separately considered: HoG descriptor magnitude calculation, HoG descriptor angle calculation, normalization and SVM classification. It is found that a 13-bit representation of variables is more than sufficient to accurately implement this system in integer arithmetic. The experiments in the paper are conducted for pedestrian detection and the methodology and the lessons learned from this study allow generalization of conclusions to a broader class of applications.

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Photocathode detection system of X-ray streak camera for laser fusion

Infrared and Laser Engineering ◽

10.3788/irla201847.0817002 ◽

2018 ◽

Vol 47 (8) ◽

pp. 817002

Author(s):

顾礼 Gu Li ◽

宗方轲 Zong Fangke ◽

李翔 Li Xiang ◽

周军兰 Zhou Junlan ◽

杨勤劳 Yang Qinlao ◽

...

Keyword(s):

Streak Camera ◽

Detection System ◽

Laser Fusion ◽

X Ray

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Influence Analysis of Feature Selection to Network Intrusion Detection System Performance Using NSL-KDD Dataset

2019 International Conference on Computer Science, Information Technology, and Electrical Engineering (ICOMITEE) ◽

10.1109/icomitee.2019.8920961 ◽

2019 ◽

Cited By ~ 2

Author(s):

Lukman Hakim ◽

Rahilla Fatma ◽

Novriandi

Keyword(s):

Feature Selection ◽

Intrusion Detection ◽

System Performance ◽

Intrusion Detection System ◽

Detection System ◽

Network Intrusion Detection ◽

Influence Analysis ◽

Network Intrusion ◽

Network Intrusion Detection System

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Innovative Techniques for X-ray Calorimetry

International Astronomical Union Colloquium ◽

10.1017/s0252921100012574 ◽

1990 ◽

Vol 115 ◽

pp. 357-360

Author(s):

S. Labov ◽

E. Silver ◽

D. Landis ◽

N. Madden ◽

F. Goulding ◽

...

Keyword(s):

Detection System ◽

Light Emitting Diode ◽

Thermal Response ◽

Diagnostic Procedures ◽

Resolving Power ◽

Infrared Light ◽

Temperature Control System ◽

Thermal Detector ◽

X Ray ◽

Noise Characteristics

AbstractIn our x-ray calorimetry effort, we have developed several techniques which may be helpful to other groups working in this field. We are studying several different monolithic and composite calorimeter designs. In our readout configuration, the preamplifier circuit employs negative voltage feedback which allows us to accurately measure the temporal profile of the thermal pulse produced by an x-ray absorbed in a micro-calorimeter. Rise times of less than two microseconds have been observed in monolithic devices operating at .3 K. Furthermore, the feedback preamplifier can be configured for either positive or negative electro-thermal feedback. This preamplifier system is followed by an analog pulse shaping amplifier with a frequency response that can be adjusted to yield the maximum signal to noise ratio for a given thermal response of the calorimeter. In addition, we have developed several diagnostic procedures which have been useful in determining the operating and noise characteristics of our devices. These include an infrared light-emitting diode which flashes a discrete amount of energy on to the calorimeter, and a capacitively coupled test input to the preamplifier which allows us to directly determine the total noise in the thermal detection system. Finally, we are developing an adiabatic demagnetization refrigerator with a temperature control system that is designed to stabilize the 0.1 K cold stage to better than 8 μK. This is required for a resistive thermal detector with resolving power of 1000.

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