We use electrical detection, in combination with microwave transmission, to investigate both resonant and nonresonant magnon-photon coupling at room temperature. Spin pumping in a dynamically coupled ...magnon-photon system is found to be distinctly different from previous experiments. Characteristic coupling features such as modes anticrossing, linewidth evolution, peculiar line shape, and resonance broadening are systematically measured and consistently analyzed by a theoretical model set on the foundation of classical electrodynamic coupling. Our experimental and theoretical approach paves the way for pursuing microwave coherent manipulation of pure spin current via the combination of spin pumping and magnon-photon coupling.
Magnon-polaritons are hybrid light-matter quasiparticles originating from the strong coupling between magnons and photons. They have emerged as a potential candidate for implementing quantum ...transducers and memories. Owing to the dampings of both photons and magnons, the polaritons have limited lifetimes. However, stationary magnon-polariton states can be reached by a dynamical balance between pumping and losses, so the intrinsically nonequilibrium system may be described by a non-Hermitian Hamiltonian. Here we design a tunable cavity quantum electrodynamics system with a small ferromagnetic sphere in a microwave cavity and engineer the dissipations of photons and magnons to create cavity magnon-polaritons which have non-Hermitian spectral degeneracies. By tuning the magnon-photon coupling strength, we observe the polaritonic coherent perfect absorption and demonstrate the phase transition at the exceptional point. Our experiment offers a novel macroscopic quantum platform to explore the non-Hermitian physics of the cavity magnon-polaritons.
HIAF (High Intensity heavy ion Accelerator Facility), a new facility planned in China for heavy ion related researches, consists of two ion sources, a high intensity Heavy Ion Superconducting Linac ...(HISCL), a 45 Tm Accumulation and Booster Ring (ABR-45) and a multifunction storage ring system. The key features of HIAF are unprecedented high pulse beam intensity and versatile operation mode. The HIAF project aims to expand nuclear and related researches into presently unreachable region and give scientists possibilities to conduct cutting-edge researches in these fields. The general description of the facility is given in this article with a focus on the accelerator design.
Platinum (Pt) metal, being nonmagnetic and with a strong spin-orbit coupling interaction, has been central in detecting the pure spin current and establishing most of the recent spin-based phenomena. ...Magnetotransport measurements, both electrical and thermal, conclusively show strong ferromagnetic characteristics in thin Pt films on the ferromagnetic insulator due to the magnetic proximity effects. The pure spin current phenomena measured by Pt, including the inverse spin Hall and the spin Seebeck effects, are thus contaminated and not exclusively established.
Dapsone is an important medication for the treatment of leprosy, but a life-threatening drug hypersensitivity syndrome develops in some patients. In this report from China, an
HLA-B
locus is ...identified as a strong genetic risk factor for the syndrome.
Dapsone (4-4′-sulfonyldianiline), which was first synthesized in 1908,
1
is both an antibiotic and an antiinflammatory agent. Dapsone alone or in combination with other drugs has been used for the prevention and treatment of infectious diseases (e.g., leprosy, malaria, and actinomycetoma, as well as
Pneumocystis jirovecii
pneumonia in persons with human immunodeficiency virus HIV infection) and chronic inflammatory diseases characterized by the infiltration of neutrophils or eosinophils (e.g., dermatitis herpetiformis, linear IgA dermatosis, subcorneal pustular dermatosis, and erythema elevatum diutinum).
2
,
3
About 0.5 to 3.6% of persons treated with dapsone have a drug hypersensitivity syndrome,
3
–
5
which was first described by . . .
A severe dust storm event originated from the Gobi Desert in Central and East
Asia during 2–7 May 2017. Based on Moderate Resolution Imaging
Spectroradiometer (MODIS) satellite products, hourly ...environmental monitoring
measurements from Chinese cities and East Asian meteorological observation
stations, and numerical simulations, we analysed the spatial and temporal
characteristics of this dust event as well as its associated impact on the
Asia-Pacific region. The maximum observed hourly PM10 (particulate
matter with an aerodynamic diameter ≤ 10 µm) concentration
was above 1000 µg m−3 in Beijing, Tianjin, Shijiazhuang,
Baoding, and Langfang and above 2000 µg m−3 in Erdos, Hohhot,
Baotou, and Alxa in northern China. This dust event affected over
8.35 million km2, or 87 % of the Chinese mainland, and significantly deteriorated air quality in 316 cities of
the 367 cities examined across China. The maximum surface wind speed during
the dust storm was 23–24 m s−1 in the Mongolian Gobi Desert and
20–22 m s−1 in central Inner Mongolia, indicating the potential
source regions of this dust event. Lidar-derived vertical dust profiles in
Beijing, Seoul, and Tokyo indicated dust aerosols were uplifted to an
altitude of 1.5–3.5 km, whereas simulations by the Weather Research and
Forecasting with Chemistry (WRF-Chem) model indicated 20.4 and 5.3 Tg of
aeolian dust being deposited respectively across continental Asia and the
North Pacific Ocean. According to forward trajectory analysis by the FLEXible
PARTicle dispersion (FLEXPART) model, the East Asian dust plume moved across
the North Pacific within a week. Dust concentrations decreased from the East
Asian continent across the Pacific Ocean from a magnitude of 103 to
10−5 µg m−3, while dust deposition intensity ranged from
104 to 10−1 mg m−2. This dust event was unusual due to its
impact on continental China, the Korean Peninsula, Japan, and the North
Pacific Ocean. Asian dust storms such as those observed in early May 2017 may
lead to wider climate forcing on a global scale.
CrSiTe3 has attracted recent interest as a candidate single-layer ferromagnetic semiconductor, but relatively little is known about the bulk properties of this material. Here, we report ...single-crystal X-ray diffraction, magnetic properties, thermal conductivity, vibrational, and optical spectroscopies and compare our findings with complementary electronic structure and lattice dynamics principles calculations. The high temperature paramagnetic phase is characterized by strong spin-lattice interactions that give rise to glassy behavior, negative thermal expansion, and an optical response that reveals that CrSiTe3 is an indirect gap semiconductor with indirect and direct band gaps at 0.4 and 1.2 eV, respectively. Measurements of the phonons across the 33 K ferromagnetic transition provide additional evidence for strong coupling between the magnetic and lattice degrees of freedom. The Si-Te stretching and Te displacement modes are sensitive to the magnetic ordering transition, a finding that we discuss in terms of the superexchange mechanism. Spin-lattice coupling constants are also extracted.
Abstract Chronic obstructive parotitis (COP) is a common disease of the parotid gland. A total of 104 patients with COP were identified and randomized into a treatment group (52 cases) and a control ...group (52 cases). All patients underwent sialography and salivary gland scintigraphy (SGS) examinations before surgery. The patients in the treatment group received chymotrypsin combined with gentamicin via interventional sialendoscopy to irrigate the duct, and the control group received gentamicin alone. All patients were asked to record their pain on a visual analogue scale (VAS) before treatment and at 1 week, 2 weeks, 1 month, 3 months, and 6 months after surgery. The VAS score for pain intensity was decreased at 1 week post-treatment in both groups ( P < 0.05). Compared to the control group, the VAS score was lower in the treatment group at 1 week, 2 weeks, and 1 month post-treatment ( P < 0.05). The 6-month postoperative SGS results showed improved uptake and excretion in both groups ( P < 0.05). The treatment group exhibited higher scores for postoperative SGS excretion than the control group ( P < 0.05). The administration of chymotrypsin combined with gentamicin by sialendoscopy is effective for the treatment of non-stone-related COP and specifically improves the excretion function of the parotid gland.
Observing the parameter-specific anti-hyperalgesic effects of EA with different stimulation times and frequencies on painful hyperalgesia mediated by the level of TRPV1 and P2X3 expression in DRG ...after CFA injection.
The model was induced by the injection of CFA in each rat's right hind paw. EA treatment was applied to the bilateral ST36 and BL60. Paw withdrawal threshold (PWT) and paw withdrawal latency (PWL) were tested with Von Frey filaments and the radiant heat source of the test instrument, respectively. TRPV1 and P2X3 expressions were measured by immunofluorescence and western blot. αβ-meATP and capsaicine combined with EA were further utilized to investigate the change in PWL.
Different stimulation times (20, 30, 45 min) combined with different frequencies (2 Hz, 100 Hz, 2/100 Hz) of EA have analgesic effects on the PWT and PWL; however, the level of the hypoalgesic efficacy of EA was primarily associated with EA frequency. The analgesic effect of EA was better at 100 Hz than at 2 Hz. The level of regulation of 100 Hz EA on TRPV1 and P2X3 in DRG was greater than that of 2 Hz. Furthermore, both TRPV1 agonist and P2X3 agonist may impair the level of EA analgesia.
EA has a parameter-specific effect on chronic inflammatory pain relief, which primarily depend on the stimulation frequency and not on the stimulation time at a certain stimulation time. The parameter-specific analgesic effect of EA is at least partially related to mediation of the protein level of TRPV1 and P2X3 expression in DRG of CFA rats.
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