Effect of Milling on the Properties of High Permeability Mn-Zn Ferrite Powders

AbstractHigh permeability Mn-Zn ferrites with broad frequency characteristic were prepared by the traditional ceramic method using the pre-sintering powders of Mn-Zn ferrite wastes. ICP Atomic Emission Spectrophotometer, scanning electron microscopy (SEM), Particle Sizer and LCR broadband digital bridge were used to investigate the influence of milling on the microstructure and properties of sintered Mn-Zn ferrite. During the milling, the impurities such as silicon and chromium were introduced into the powders as using steel balls. The particle size of powders decreased to a †minimum size with the increasing of milling time. As the particle size after milling was about 1 um, the initial permeability of Mn-Zn ferrites with small internal porosity, high density and uniform structure could reach 10000. Furthermore, the value were unaffected by the change in frequency 0 to 150 kHz

Culture variation in the average identity extraction: The role of global vs. local processing orientation

Research has shown that observers often spontaneously extract a mean representation from multiple faces/objects in a scene even when this is not required by the task. This phenomenon, now known as ensemble coding, has so far mainly been based on data from Western populations. This study compared East Asian and Western participants in an implicit ensemble-coding task, where the explicit task was to judge whether a test face was present in a briefly exposed set of faces. Although both groups showed a tendency to mistake an average of the presented faces as target, thus confirming the universality of ensemble coding, East Asian participants displayed a higher averaging tendency relative to the Westerners. To further examine how a cultural default can be adapted to global or local processing demand, our second experiment tested the effects of priming global or local processing orientation on ensemble coding via a Navon task procedure. Results revealed a reduced tendency for ensemble coding following the priming of local processing orientation. Together, these results suggest that culture can influence the proneness to ensemble coding, and the default cultural mode is malleable to a temporary processing demand

Investigate the application of postoperative ctDNA-based molecular residual disease detection in monitoring tumor recurrence in patients with non-small cell lung cancer——A retrospective study of ctDNA

PurposeTo evaluate whether postoperative circulating tumor DNA (ctDNA) in plasma of patients with non-small cell lung cancer (NSCLC) can be used as a biomarker for early detection of molecular residual disease (MRD) and prediction of postoperative recurrence.MethodsThis study subjects were evaluated patients with surgical resected non-small cell lung cancer. All eligible patients underwent radical surgery operation followed by adjuvant therapy. Tumor tissue samples collected during operation were used to detect tumor mutation genes, and blood samples collected from peripheral veins after operation were used to collect ctDNA. Molecular residue disease (MRD) positive was defined as at least 1 true shared mutation identified in both the tumor sample and a plasma sample from the same patient was.ResultsPositive postoperatively ctDNA was associated with lower recurrence-free survival (RFS).The presence of MRD was a strong predictor of disease recurrence. The relative contribution of ctDNA-based MRD to the prediction of RFS is higher than all other clinicopathological variables, even higher than traditional TNM staging. In addition, MRD-positive patients who received adjuvant therapy had improved RFS compared to those who did not, the RFS of MRD-negative patients receiving adjuvant therapy was lower than that of patients not receiving adjuvant therapy.ConclusionsPost-operative ctDNA analysis is an effective method for recurrence risk stratification of NSCLC, which is beneficial to the management of patients with NSCLC