Algebra of Hyperbolic Band Theory under Magnetic Field

We explore algebras associated with the hyperbolic band theory under a magnetic field for the first time. We define the magnetic Fuchsian group associated with a higher genus Riemann surface. By imposing the magnetic bounday conditions for the hyperbolic Bloch states, we construct the hyperbolic magnetic Bloch states and investigate their energy spectrum. We give a connection between such magnetic Bloch states and automorphic forms. Our theory is a general extension of the conventional algebra associated with the band theory defined on a Euclidean lattice/space into that of the band theory on a general hyperbolic lattice/Riemann surface.Comment: 21 pages, 2 figures. arXiv admin note: substantial text overlap with arXiv:2104.1331

Reconstruction of the atmospheric CO2 concentration history from an Antarctic deep ice core, Dome Fuji using a wet extraction technique: analysis procedures,dating of air in ice and concentration variations (scientific paper)

In order to deduce the atmospheric CO2 concentration variations over the past 320 kyr, air samples were extracted from the Dome Fuji deep ice core using a wet extraction method, and their CO2 concentration values were determined with a reproducibility of 1.0 ppmv. By measuring the CO2 concentrations of firn air samples collected at Dome Fuji, it was found that the effective bubble close-off depth can be defined by the mid-point of the close-off zone. For dating the air in the ice core, the age difference between ice and air (Δage) was estimated by using a densification model to be between 1000 and 5000 years, showing small and large values during the interglacial and glacial periods, respectively, due primarily to variations of precipitation. The CO2 concentration variations with a mean time resolution of about 1.1 kyr over the last three glacial-interglacial cycles showed a good correlation with those of δ18O, which suggests that the Southern Ocean played an important role in the variation of the atmospheric CO2 concentration during the last three glacial-interglacial cycles

Numerical study of QCD phase diagram at high temperature and density by a histogram method

We study the QCD phase structure at high temperature and density adopting a histogram method. Because the quark determinant is complex at finite density, the Monte-Carlo method cannot be applied directly. We use a reweighting method and try to solve the problems which arise in the reweighting method, i.e. the sign problem and the overlap problem. We discuss the chemical potential dependence of the probability distribution function in the heavy quark mass region and examine the applicability of the approach in the light quark region.Comment: 5 pages, 6 figures, presented at the International Conference "Critical Point and Onset of Deconfinement - CPOD 2011", Wuhan, November 7-11, 201

Exercise hyperpnea and hypercapnic ventilatory responses in women

SummaryWe studied the relationship between exercise hyperpnea (i.e., ventilatory dynamics) at the onset of exercise and hypercapnic ventilatory response (HCVR), and their differences between the follicular (FP) and luteal (LP) phases of the menstrual cycle in six healthy females. HCVR was tested under three O2 conditions: hyperoxia (FiO2=1.0), normoxia (0.21), and hypoxia (0.12). HCVR was defined as the relationship between the end-tidal PCO2 and minute ventilation (V˙E) using the regression line of the CO2 slope and a mimetically apneic threshold of CO2. HCVR provocation and measurements were conducted using an inspired CO2 concentration of up to approximately 8mmHg higher than the end-tidal PCO2 level of basal isocapnic the end-tidal PCO2 at each menstrual both the slope and threshold in HCVR showed no statistically significant difference between LP and FP under any inspired FiO2 conditions. In the case of exercise hyperpnea during the onset of submaximal exercise, the mean response time (MRT) in V˙E dynamics showed no significant difference between LP and FP. Consequently, MRT in V˙E response was not related to the slope in HCVR. During steady-state exercise, even though the V˙E/V˙CO2 showed no significance between LP and FP, V˙E/V˙CO2 was significantly related to the slope in HCVR (r=0.59, P<0.05). Exercise ventilation (i.e., V˙E/V˙CO2) would partly be adjusted by the enhancement of the chemoreflex drive to CO2 only during the steady-state exercise

Phosphorus Pile-up Model for Si0,-Si Interface of p-Channel MOSFETs

It is conventionally understood that after annealing and oxidation during device fabrication phosphorus dopant finally distributes at the Si0,-Si interface. We found, however, that the conventional model ( We use the assumption of phosphorus pile-up in the interlayer [4, 51 shown in where an interlayer of 0.5 nm absorbs the phosphorus with its specified segregation coefficients and is removed by oxide removal. This model reproduces the threshold voltages of p-channel MOSFETs well Authors are thankful to Drs. Wada, Amakawa, and Kinoshita of Toshiba Corporation for well with the experimental one, so the proposed model is appropriate. their providing simulation software and fruitful discussions. [l] N

Simple of syntheses of marine alkaloid, (±)-helonin A, and its analogs

金沢大学大学院自然科学研究科生理活性物質科学金沢大学薬学

Dating of the Dome Fuji, Antarctica deep ice core (scientific paper)

The Antarctic ice sheet preserves paleo-climate information in the form of physical and chemical stratigraphy. A deep ice core was continuously drilled down to a depth of 2,503 m at Dome Fuji station, East Dronning Maud Land, Antarctica, during the 1993-97 JARE inland operations. Oxygen isotope measurements were conducted on 7 to 50 cm-long ice core samples selected from the entire core depth. A time scale for the Dome Fuji core is calculated from past accumulation rates and an ice flow model. Past accumulation rates were converted from oxygen isotope values by using an empirical equation obtained in the Dome Fuji area. A steady-state flow model was preciously developed for a time scale calculation of the Summit ice core, Greenland. Using reference depth points from volcanic signals and annual layer thickness values measured on the Dome Fuji core allows for tuning of the calculated time scale. A depth-age profile was obtained for the past 320 kyr. The obtained paleo-temperature profile shows the characteristics of the past three glacial and interglacial periods. The power spectrum of &#402;&Acirc;18O change over an interval of 320 kyr reveals three dominant cycles. The paleo-temperature profile coincides quite well with the Vostok ice core data in general but not in detail, suggesting that further studies are needed both for chronological investigations and a multi-factor, cross-correlation analysis between deep ice cores for climatological understanding

A different distribution of corticotropin releasing factor and arginine vasopressin contents in the hypothalamic nuclei after estrogen administration.

The distribution of corticotropin releasing factor (CRF) and arginine vasopressin (AVP) in hypothalamic nuclei were examined in control and estrogen-treated female rats. CRF activity was measured using monolayer cultured rat anterior pituitary cells and AVP by radioimmunoassay. Hypothalamic nuclei were punched out according to the method of Palkovits. The distribution of CRF activity in 5 different hypothalamic nuclei was similar to that of AVP in intact female rats. CRF activity in hypothalamic nuclei, pituitary ACTH content and plasma ACTH levels in estrogen-treated rats were not significantly different from those in control rats. However, significant elevation of AVP content was observed in the supraoptic and paraventricular nuclei of estrogen-treated rats. These results indicate that CRF and AVP are distributed in similar hypothalamic nuclei, but that they are not identical.</p