This paper reports a series of controlled experiments which is carried out on the microstripline. The results of the experiments showed, when the resonant Josephson tunnel junction was placed there, where the magnetic field on the stripline was stronger, the coupling was better. Thus the point of view of the magnetic coupling is further proved.
We report on the fabrication of small area (1-6 μm 2 ), high critical current density (10 3 -10 4 A/cm 2 ) Ta/Ta oxide/ Pb 0.9 Bi 0.1 SIS tunnel junctions and six junction series arrays designed for use as broadband SIS quasiparticle mixers as 85-110 GHz. These junctions have small subgap leakage currents (1 to 5%), and a "sharp" current rise of width ΔV ∼30-50 μV at the sum gap voltage. An RF filter is fabricated on the substrate along with the junctions. The impedance of this filter combined with the junction capacitance is designed to provide a broadband RF match to the mixer over the entire frequency range. A sliding backshort is the only mechanical tuning element. The single junctions as well as arrays are fabricated with a window geometry on fused quartz substrates. The fused quartz substrates require the deposition of a thin amorphous Ge layer which is conducting as room temperature to avoid charging effects during the ion-beam processing steps. Preliminary measurements at 85- 100 GHz show a relatively low gain (-6.9 dB) compared to the performance expected for junctions of this quality. Model calculations suggest that the low gain arises from errors in the implementation of the RF filter design; this can be improved in future work.
Abstract As a type of macronutrient, fatty acids (FA) play significant roles in the bone health of elderly people. However, the specific association between different types of FA and bone health is not fully understood, especially in rural elderly populations. To address this gap, a study was conducted in rural areas of Qingdao, China. Participants aged 65 and older were randomly recruited from 11 rural villages in Licha town, Qingdao City. The levels of serum FA in their serum were measured to investigate the associations between FA and bone mass. The results showed that levels of saturated fatty acids (SFA), n‐3 polyunsaturated fatty acids (n‐3 PUFA), and n‐6 polyunsaturated fatty acids (n‐6 PUFA) were all significantly associated with bone mass. Specifically, higher levels of SFA were positively correlated with low bone mass (LBM), while PUFA levels were inversely correlated with LBM. Furthermore, the odds ratio (OR) for LBM exhibited a significant nonlinear dose–response relationship ( p nonlinearity = 0.1989) with SFA levels, and a significant nonlinear dose‐dependent relationship was also observed with the levels of n‐3PUFA and n‐6PUFA ( p nonlinearity = 0.6183, 0.5808, respectively), indicating that increasing dietary PUFA intake appropriately and controlling SFA intake may benefit the bone health of elderly individuals in rural areas.
Radio-frequency (RF) SQUIDs were evaluated with weak links in epitaxial YBa2Cu3O7 films created by either local ion-implantation or step-edges in the substrate. It is shown that such weak links permit one to fabricate RF-SQUIDs with low 1/f noise. The step-edge SQUIDs show a promise of reproducible Ic control.
The search for new and effective chemotherapeutic agents for the treatment of glioblastoma (GBM) represents an unmet need in drug discovery. Herein, a class of novel
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