Radiographic Proximal Caries Detection and Multiple Intelligences

Introduction: The accuracy of radiographic caries detection is a multifactorial diagnostic task. One the important factors are the Inter-observer variability. One of the suggested procedures to estimate the variations is the Multiple Intelligence (MI) theory of Howard Gardner. Aim: The current research aims to study the relation among radiographic proximal caries detection accuracy and MI for dental undergraduate and new graduates (trainees) Patients and Methods: Twenty dental students who have just terminated caries detection training and 19 interns were employed. The sample composed of seventeen men and twenty two women. Caries detection precision was estimated as the region under Receiver Operating Characteristic (ROC) curve (Az) scores, and MI scores were estimated by sing a modified, bilingual MIS self-recorded questionnaire. MS Excel software was applied to calculate means, percentages and correlation. Results: There was little and mild positive correlation among Az and Spatial/Visual (0.29) and Intrapersonal (0.31) domains of MI respectively. The current correlation was mild for students (0.38) and (0.40), and it was lowered for interns (0.28) and (0.26) respectively. Conclusions: There is positive weak relationship between Az and the domains of Spatial/Visual and Intrapersonal of MI. This relationship might be diminished by education and training.

Investigation of Low Frequency Noise-current Correlation for the InAs/GaSb T2SL Long-wavelength Infrared Detector

In this paper, a mesa-type 256×8 long-wavelength infrared detector is prepared by using InAs/GaSb type-II superlattice material with double barrieres structure. the area of each pixel is 25×25 μm2. The cut-off wavelength and dark current density of the detector at -0.05 V bias with liquid nitrogen temperature is 11.5 μm and 4.1×10-4 A/cm2, respectively. The power spectrum of low-frequency noise (1/f noise) at different temperatures have also been fitted by the Hooge model, and the correlations with dark current are extracted subsequently. The results shown that the 1/f noise of the detector is mainly caused by the generation-recombination current at a low reverse bias, however, when the reverse bias is high, the 1/f noise should be expressed by the sum of Igr noise and Ibtb noise which is ignored in the previous research. The 1/f noise-current correlation assessed in this work can provide insights into the low frequency noise characteristics of long-wavelength T2SL InAs/GaSb detectors, and allow for a better understanding of the main source of low-frequency noise.

US shift boosts hopes of Venezuela dialogue progress

Significance Optimism is building that there will be progress in dialogue efforts between President Nicolas Maduro's government and US-recognised ‘interim president’ Juan Guaido. The current correlation of domestic and international interests is favourable to a breakthrough, but significant obstacles and spoilers will need to be navigated. Impacts Delegations from the government and opposition will maintain a schedule of international engagements linked to the dialogue process. Factionalism within both the ruling party and the opposition will surface over concessions made in negotiations. A positive outcome will require authoritative positioning by Maduro and Guaido to ensure they can carry their respective blocks with them.

On the specification of the chronostratigraphic scheme of the Buzko-Rosynskyi block of the Ukrainian Shield

In the current correlation chronostratigraphic scheme of early Precambrian of the Ukrainian Shield, among Neoarchean supra crystalline formations of the Buzko-Rosynskyi block, it is identified the Rosynsko-Tikytska series, which consist of the Myzynivska and Lysianska strata and the independent Volodarsko-Bilotserkivska strata, which are located on the same stratigraphic level in the scheme. According to the results of the mapping of metamorphic formations within this block during the geological survey of scale 1:200 000 (articles “Bila Tserkva”, “Uman”, “Lyubashivka”, “Kotovsk”, “Haisyn”, “Skvyra”) it is established these stratas are located in the section in a following order: the lower one is the Myzynivska, the middle one is the Volodarsko-Bilotserkivska and the upper one is the Lysianska and they form a single Rosynsko-Tikytska series. Also, these works did not confirm the presence in the region of the Bilotserkivska group of magnetic anomalies of two-pyroxene schale among the rocks of the Volodarsko-Bilotserkivska strata. This is a sign of their higher metamorphism degree. The hypersthene is present in the area of the Volodarka then only in high-iron rocks. Its presence is associated with a local temperature increase during metamorphism due to the high oxidative ability of iron. This indicates the possibility of its crystallization under conditions of amphibolite facies. A powerful argument in favor of this is the occurrence of a relatively thin carbonate-ferruginous-siliceous strata among thick amphibolite-gneiss and crystalline-schist-amphibolite strata which metamorphosed under amphibolite facies conditions. It indicates the low probability that the metamorphism of the iron ore could occur locally in other conditions. The obtained new data on the composition of the Rosynsko-Tikytska series and the actual stratigraphic sequence of stratas in it, indicates the necessity of making appropriate changes in the current correlation chronostratigraphic scheme of early Precambrian formations of the Ukrainian Shield.