154 research outputs found
Improvement of Biocompatibility of Silicone Elastomer by Surface Modification
γ-Methacryloxypropyltrimethoxysilane (γ-MPS) was grafted to silicone due to emulsion polymerization to induce Si-OH groups, in order to provide silicone with bioactivity spontaneous deposition of apatite in body fluid and to improve cytocompatibility. Apatite deposited on the grafted silicone within 7 days of soaking in 1.5 times as concentrated as the Kokubo solution. Osteoblastic cells (MC3T3-E1) were cultured on the specimens up to 7 days. After 5 days of culture, the number of MC3T3-E1 cells on the grafted specimen was much greater than that on the original specimen. These results indicated that the biocompatibility of silicone elastomer was improved by the grafting γ-MPS
Mutual Learning of Single- and Multi-Channel End-to-End Neural Diarization
Due to the high performance of multi-channel speech processing, we can use
the outputs from a multi-channel model as teacher labels when training a
single-channel model with knowledge distillation. To the contrary, it is also
known that single-channel speech data can benefit multi-channel models by
mixing it with multi-channel speech data during training or by using it for
model pretraining. This paper focuses on speaker diarization and proposes to
conduct the above bi-directional knowledge transfer alternately. We first
introduce an end-to-end neural diarization model that can handle both single-
and multi-channel inputs. Using this model, we alternately conduct i) knowledge
distillation from a multi-channel model to a single-channel model and ii)
finetuning from the distilled single-channel model to a multi-channel model.
Experimental results on two-speaker data show that the proposed method mutually
improved single- and multi-channel speaker diarization performances.Comment: Accepted to IEEE SLT 202
Quantum Phase Transition in Lattice Model of Unconventional Superconductors
In this paper we shall introduce a lattice model of unconventional
superconductors (SC) like d-wave SC in order to study quantum phase transition
at vanishing temperature (). Finite- counterpart of the present model was
proposed previously with which SC phase transition at finite was
investigated. The present model is a noncompact U(1) lattice-gauge-Higgs model
in which the Higgs boson, the Cooper-pair field, is put on lattice links in
order to describe d-wave SC. We first derive the model from a microscopic
Hamiltonian in the path-integral formalism and then study its phase structure
by means of the Monte Carlo simulations. We calculate the specific heat,
monopole densities and the magnetic penetration depth (the gauge-boson mass).
We verified that the model exhibits a second-order phase transition from normal
to SC phases. Behavior of the magnetic penetration depth is compared with that
obtained in the previous analytical calculation using XY model in four
dimensions. Besides the normal to SC phase transition, we also found that
another second-order phase transition takes place within the SC phase in the
present model. We discuss physical meaning of that phase transition.Comment: 12 pages, 10 figures, references added, some discussion on the
results adde
Higgs mechanism and superconductivity in U(1) lattice gauge theory with dual gauge fields
We introduce a U(1) lattice gauge theory with dual gauge fields and study its
phase structure. This system is motivated by unconventional superconductors
like extended s-wave and d-wave superconductors in the strongly-correlated
electron systems. In this theory, the "Cooper-pair" field is put on links of a
cubic lattice due to strong on-site repulsion between electrons in contrast to
the ordinary s-wave Cooper-pair field on sites. This Cooper-pair field behaves
as a gauge field dual to the electromagnetic U(1) gauge field. By Monte Carlo
simulations we study this lattice gauge model and find a first-order phase
transition from the normal state to the Higgs (superconducting) state. Each
gauge field works as a Higgs field for the other gauge field. This mechanism
requires no scalar fields in contrast to the ordinary Higgs mechanism.Comment: 4 pages, 6 figure
Autonomous, bidding, credible, decentralized, ethical, and funded (ABCDEF) publishing [version 2; peer review: 1 approved, 2 approved with reservations]
Scientists write research articles, process ethics reviews, evaluate proposals and research, and seek funding. Several strategies have been proposed to optimize these operations and to decentralize access to research resources and opportunities. For instance, we previously proposed the trinity review method, combining registered reports with financing and research ethics assessments. However, previously proposed systems have a number of shortcomings, including how to implement them, e.g., who manages them, how incentives for reviewers are paid, etc. Various solutions have been proposed to address these issues, employing methods based on blockchain technologies, called “decentralized science (DeSci)”. Decentralized approaches that exploit these developments offer potentially profound improvements to the troubled scientific ecosystem. Here, we propose a system that integrates ethics reviews, peer reviews, and funding in a decentralized manner, based on Web3 technology. This new method, named ABCDEF publishing, would enhance the speed, fairness, and transparency of scientific research and publishing
- …