scholarly journals Preliminary Study on TRISO Fuel Cross Section Generation

2020 ◽  
Author(s):  
Hansol Park ◽  
Won Yang ◽  
Changho Lee ◽  
Yeon Jung
Keyword(s):  
Cross Section ◽  
Triso Fuel ◽  
Preliminary Study

A Preliminary Study on the Angular Distribution of Scattered Ultrasound from Bovine Liver and Myocardium

1987 ◽  
Vol 9 (2) ◽  
pp. 132-145
Author(s):  
Thomas M. Burke ◽  
Ernest L. Madsen ◽  
James A. Zagzebski
Keyword(s):  
Angular Distribution ◽  
Connective Tissue ◽  
Cross Section ◽  
Unit Volume ◽  
Bovine Liver ◽  
Experimental Conditions ◽  
Ultrasonic Scattering ◽  
Differential Scattering Cross Section ◽  
Scattering Cross ◽  
Preliminary Study

Measurements were performed on freshly-excised bovine liver and myocardium to determine the ultrasonic scattering nature of the tissues under a variety of experimental conditions. Results for the angular distribution of the differential scattering cross section per unit volume of tissue are reported for scattering angles spanning 170 to 44 degrees for interrogating frequencies of 1.0, 2.25, 3.5 and 5.0 MHz. Fresh and aged tissues, some with abnormally high connective tissue content were analyzed. The results are compared to previously-published works.

Absorption Cross Section Simulation: a Preliminary Study of Ultraviolet Absorption Spectroscopy for Ozone Gas Measurement

2013 ◽  
Vol 64 (3) ◽  
Author(s):  
Tay Ching En Marcus ◽  
Michael David ◽  
Maslina Yaacob ◽  
Mohd Rashidi Salim ◽  
Mohd Haniff Ibrahim ◽  
...  
Keyword(s):  
Cross Section ◽  
Absorption Spectroscopy ◽  
Absorption Cross Section ◽  
Ultraviolet Absorption ◽  
Ultraviolet Region ◽  
Slight Variation ◽  
Absorption Cross ◽  
Peak Absorption ◽  
Ultraviolet Absorption Spectroscopy ◽  
Preliminary Study

Preliminary study to measure gaseous ozone concentration using ultraviolet absorption spectroscopy is presented. Firstly, background of ozone is introduced. Next, fundamental theory behind ultraviolet absorption spectroscopy is discussed based on Beer-Lambert’s Law and absorption spectrum of ozone. After that, absorption cross section of ozone is simulated via spectralcalc.com. Temperature of system is varied. Peak absorption cross section and peak absorption wavelength are found to be 1.166 ´ 10-21 m2 molecule-1 and 255.376 nm respectively at 300 K and 0 torr. Absorption cross section in ultraviolet region shows slight variation of at most 1.286 per cent when temperature is changed from 200 K to 300 K. Around room temperature, peak absorption cross section simulated in current work is consistent with previous work, because relative error is found to be small in between 1.630 per cent and 3.087 per cent. Unlike previous work, absorption of light by ozone is detected in ultraviolet region only due to weak absorption in visible region.

scholarly journals Mammary Cistern Size during the Dry Period in Healthy Dairy Cows: A Preliminary Study for an Ultrasonographic Evaluation

Animals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2082
Author(s):  
Francesca Bonelli ◽  
Chiara Orsetti ◽  
Luca Turini ◽  
Valentina Meucci ◽  
Alessio Pierattini ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Cross Section ◽  
Cross Sections ◽  
Multiple Comparisons ◽  
Friedman Test ◽  
Dry Period ◽  
Negative Linear Correlation ◽  
Preliminary Study ◽  
Post Hoc ◽  
Spearman Test

We evaluated the udder cistern (UC) size during the dry period using ultrasound. Forty healthy quarters were evaluated in both the longitudinal and cross-section of the UC. Quarters were evaluated at the drying-off (T0) and 24 h later (T1), then regularly until the end of the dry period (T7–T58), during the colostrum production phase (TCPP) and at 7 days in milking (T7PP). The Spearman test was applied to find the correlation between the ultrasonographic UC size (UUCS) assessment and time. The Friedman test and Dunn’s test for multiple comparisons as a post-hoc test were performed to compare the forequarter and hindquarter cross-sections (FQCSs and HQCSs, respectively) and the forequarter and hindquarter longitudinal sections (FQLSs and HQLSs, respectively) at T0 vs. T58 vs. TCPP vs. T7PP. A total of 440 images were evaluated. A negative linear correlation between time and FQCS and FQLS (r = −0.95; p < 0.0004) and between time and HQCS and HQLS (r = −0.90; p < 0.002) was found. The UUCS decreased throughout the dry period, starting to increase at the beginning of the next lactation. Measuring the UUCS provides useful information for monitoring the dry period.

scholarly journals Preliminary Study of Double Beta Decay: Simulation of CaMoO4 Scintillation Detector Response Function to the Gamma Ray Radiation

2016 ◽  
Vol 1 ◽  
Author(s):  
Mitra Djamal
Keyword(s):  
Beta Decay ◽  
Cross Section ◽  
Response Function ◽  
Scintillation Detector ◽  
Gamma Ray ◽  
Double Beta Decay ◽  
Detector Response ◽  
Electromagnetic Process ◽  
Preliminary Study ◽  
Double Beta Decay Experiment

<p class="TTPAbstract">CaMoO<sub>4</sub> crystal is a material candidate forthe scintillation detector and double beta decay experiment to determinea neutrino mass. The objective of this work is to analyze the response function of CaMoO<sub>4 </sub>using Monte Carlo GEANT4 simulation. Penelope-low energy method was used as an interaction type for the electromagnetic process. The simulation results show that the presence of the photopeak energies of gamma ray from Cs-137, Co-60 and K-40 sources can be identified and observed in the energy 0.662 MeV, 1.17 MeV, 1.33 MeV and 1.5 MeV. The photoelectric cross section interaction of CaMoO<sub>4 </sub>is lower than NaI(Tl), but in other hand the incoherent cross section is vice versa.</p>

scholarly journals Cubic Phases in the Gd2O3-ZrO2 and Dy2O3-TiO2 Systems for Nuclear Industry Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Maria Teresa Malachevsky ◽  
Diego Rodríguez Salvador ◽  
Sergio Leiva ◽  
Claudio Alberto D'Ovidio
Keyword(s):  
Cross Section ◽  
Reactor Core ◽  
Neutron Cross Section ◽  
Nuclear Industry ◽  
Cubic Phase ◽  
Oxide Ceramic ◽  
Inert Matrix ◽  
Industry Applications ◽  
Preliminary Study ◽  
High Neutron

Neutron absorbers are elements with a high neutron capture cross section that are employed at nuclear reactors to control excess fuel reactivity. If these absorbers are converted into materials of relatively low absorption cross section as the result of neutron absorption, they consume during the reactor core life and so are called burnable. These elements can be distributed inside an oxide ceramic that is stable under irradiation and thus called inert. Cubic zirconium oxide is one of the preferred materials to be used as inert matrix. It is stable under irradiation, experiments very low swelling, and is isomorphic to uranium oxide. The cubic phase is stabilized by adding small amounts of dopants like Dy2O3 and Gd2O3. As both dysprosium and gadolinium have a high neutron cross section, they are good candidates to prepare burnable neutron absorbers. Pyrochlores, like Gd2Zr2O7 and Dy2Ti2O7, allow the solid solution of a large quantity of elements besides being stable under irradiation. These characteristics make them also useful for safe storage of nuclear wastes. We present a preliminary study of the thermal analysis of different compositions in the systems Gd2O3-ZrO2 and Dy2O3-TiO2, investigating the feasibility to obtain oxide ceramics useful for the nuclear industry.

scholarly journals Big Data and Their Social Impact: Preliminary Study

2019 ◽  
Vol 11 (18) ◽  
pp. 5067 ◽  
Author(s):  
Miltiades D. Lytras ◽  
Anna Visvizi
Keyword(s):  
Big Data ◽  
Social Science ◽  
Computer Science ◽  
Cross Section ◽  
Social Impact ◽  
Personal Data ◽  
A Value ◽  
The Social ◽  
Preliminary Study ◽  
Specific Impact

Big data is the buzz-word of today, and yet their specific impact on individuals and societies remains assumed rather than fully understood. Clearly, big data and their use have already given rise to a number of questions, including those of how data can be collected and used in ethical and socially sensitive ways. Building on these points, the objective of this study was to explore how precisely big data and big data based services influence individuals and societies. This paper elaborates on individuals’ perceptions of data, especially on how they perceive the actual sharing of their data. In this way, this paper defines a value space for the social impact of big data relevant to three factors, namely the intention to share personal data, individual’s concerns, and social impact of big data.The main contribution of this study consists of the insights into the still nascent area of research that unfolds at the cross-section of social science and computer science. We expect that in the next years this area of research will gain prominence.

A Preliminary Study of DXA and QCT Derived Femur Cross-Section Stiffness

2015 ◽  
Vol 775 ◽  
pp. 415-419
Author(s):  
Yun Hua Luo ◽  
Hui Juan Yang ◽  
Laura Targownik ◽  
Andrew Goertzen ◽  
William D. Leslie
Keyword(s):  
Cross Section ◽  
Bone Quality ◽  
Quantitative Computed Tomography ◽  
Heterogeneous Material ◽  
Dual Energy ◽  
Strong Correlations ◽  
X Ray ◽  
Study Results ◽  
Spatial Geometry ◽  
Preliminary Study

Dual energy X-ray absorptiometry (DXA) and quantitative computed tomography (QCT) are the two clinic imaging modalities available for examining bone quality. However, there is a dilemma in their selection. DXA uses a lower and safer X-ray dosage, but the produced image is two-dimensional, the information of bone spatial geometry and heterogeneous material distribution required for evaluating bone quality is missing; On the other hand, although QCT is able to capture all the required information, it has to use amuch higher X-ray dosage that may be a potentialhealth concern. Femur cross-section stiffness is an important parameter forassessing bone quality. Although itcan be determined from both DXA and QCT image, it is best computed from QCT for the reason mentioned in the above. In this study, we attempted to establish the ‘equivalence’ between DXA and QCT derived femur cross-section stiffness. If it is successful, DXA can be used in replacement of QCT in assessing bone quality. The study results showed that there indeed exist strong correlations between DXA and QCT derived femur stiffness, but they are not equivalent to each other.

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