123 research outputs found
Local Hurst Exponent Computation of Data from Triaxial Seismometers Monitoring KAGRA
No full textThe Hurst exponent was computed locally for three triaxial seismometers monitoring the KAGRA corner station and the two end stations of the interferometer allowing to estimate variability in the persistent behaviour of the seismometer time series. Results show that, in all the three cases considered, the vertical component of the seismometer has lower persistency compared to the horizontal degrees of freedom, as also confirmed by the low frequency region of the amplitude spectral density of the data. Furthermore, data of the horizontal components of the EXV end station, located in the direction of the X arm of the interferometer, exhibits lower values of seismic noise and of its Hurst exponent. This is possibly due to the lack of an exit point at this location, and hence to a reduced human activity, to the presence of water flow in the mine hosting the KAGRA detector or to differences in seismometers' self noise
Cameraria guttifinitella
No full text<p> <b> <i>Cameraria guttifinitella</i> (Clemens, 1859)</b> </p> <p> ♂, [right forewing and hindwing missing], [1] (handwritten in black Indian ink)‘ UNITED STATES / sup. <i>Rhus toxicodendron</i> /viii-ix Clemens Coll / Mus. Am. Ent. Soc. / Philadelphia 1872 / 36059’, [2] (printed) ‘Walsingham / Collection. / 1910-427’; [3] (handwritten in black Indian ink) ‘ <i>Lithocolletis</i> / <i>guttifinitella</i> ♂ / Clms / HOMOTYPE Clms’; [4] (handwritten in black Indian ink) ‘W. 22’; [5] (handwritten in black Indian ink) ‘B.M. 22’; [6] (printed) ‘B.M. ♂/ Genitalia slide No (handwritten in red Indian ink) 4419’, in BMNH: drawer Mi 10019.</p> <p>Note: HOMO-TYPE means: A taxonomic type for a specimen which has been compared with the holotype by another than the author of the species and determined by him to be conspecific with it (McGraw-Hill Science and Technology Dictionary 2011).</p>Published as part of <i>Prins, Jurate De & Kawahara, Akito Y., 2012, Systematics, revisionary taxonomy, and biodiversity of Afrotropical Lithocolletinae (Lepidoptera: Gracillariidae), pp. 1-283 in Zootaxa 3594 (1)</i> on page 39, DOI: 10.11646/zootaxa.3594.1.1, <a href="http://zenodo.org/record/6052126">http://zenodo.org/record/6052126</a>
Absolute Gravity Measurements at Sakurajima Volcano During the Period 1998-2002
No full text桜島火山では，1975年以降，活発な山頂噴火活動に伴って重力の増加傾向が観測されてきた。桜島の重力場の時空変動を高精度にかつ絶対値で解明する事を目的とし，従来から用いてきたラコスト重力計に加え，1998年よりFG5絶対重力計を用いた絶対重力測定を開始した。2002年までの測定の結果，従来観測されてきた重力の増加傾向が，近年ほぼ停止している事が明らかとなった。近年の山頂噴火活動静穏化を反映した現象であると考えられる。In Sakurajima volcano, Southern Kyushu, Japan, the remarkable gravity increase has been observed in thecentral region of the volcano during the period of active stage with continuous summit eruptions since 1975. Toclarify both special and time changes of gravity field accurately and in the absolute sense, we began the FG5absolute gravity measurements combined with those using LaCoste gravimeters in 1998. As the result of theevaluation of observed gravity changes during the period from 1998 to 2002, it is found that the gravity increaseobserved since 1975 stops during almost all of our observation periods. This phenomenon seems to relate to thedecreased activities of summit eruptions in recent years.桜島火山では，1975年以降，活発な山頂噴火活動に伴って重力の増加傾向が観測されてきた。桜島の重力場の時空変動を高精度にかつ絶対値で解明する事を目的とし，従来から用いてきたラコスト重力計に加え，1998年よりFG5絶対重力計を用いた絶対重力測定を開始した。2002年までの測定の結果，従来観測されてきた重力の増加傾向が，近年ほぼ停止している事が明らかとなった。近年の山頂噴火活動静穏化を反映した現象であると考えられる。In Sakurajima volcano, Southern Kyushu, Japan, the remarkable gravity increase has been observed in thecentral region of the volcano during the period of active stage with continuous summit eruptions since 1975. Toclarify both special and time changes of gravity field accurately and in the absolute sense, we began the FG5absolute gravity measurements combined with those using LaCoste gravimeters in 1998. As the result of theevaluation of observed gravity changes during the period from 1998 to 2002, it is found that the gravity increaseobserved since 1975 stops during almost all of our observation periods. This phenomenon seems to relate to thedecreased activities of summit eruptions in recent years
Widespread imiquimod-induced psoriasis like eruption: case report and analysis of mast cell infiltration.
No full textPsoriasis is an inflammatory skin disease that affects over 60 million adults and children worldwide.1 Many genetically innovative and easy-to-use models have been generated to study psoriasiform skin inflammation in mice. Topical application of imiquimod, the agent with immune response modifying activity, is widely used for psoriasis research. A Previous study demonstrated that mast cells (MCs) increase in imiquimod-induced psoriasis in mice.2 Topical application of imiquimod is used to treat actinic keratosis and condyloma acuminatum. Several cases of psoriasis-like eruptions caused by topical imiquimod have been reported. These eruptions are distinct from psoriasis. Moreover, psoriasis-like eruptions observed in areas other than the topical imiquimod site.3 Herein, we report a case of psoriasis like eruptions after topical imiquimod treatment. In previous studies, upregulation in the number and activation of MCs has been found in imiquimod-induced psoriasis in mice. 2 Mast cell infiltration has been found in patients with psoriasis.2 However, mast cell infiltration and the number of MCs in imiquimod-induced psoriasis in humans is unclear. We investigated the number of MCs in our case for a better understanding the mechanism of imiquimod-induced psoriasis like eruption.Tatsuya Katsumi, Ryota Hayashi, Shingo Takei, Manon Okamura, Yuka Tsutsui, Osamu Ansai, Akito Hasegawa, Yu Matsui, Tatsuya Takenouchi, Riichiro Abe, Widespread imiquimod-induced psoriasis-like eruption: case report and analysis of mast cell infiltration, Clinical and Experimental Dermatology, Volume 50, Issue 6, June 2025, Pages 1221–1224, https://doi.org/10.1093/ced/llae527This is a pre-copyedited, author-produced version of an article accepted for publication in Clinical and Experimental Dermatology following peer review.
The version of record, Tatsuya Katsumi, Ryota Hayashi, Shingo Takei, Manon Okamura, Yuka Tsutsui, Osamu Ansai, Akito Hasegawa, Yu Matsui, Tatsuya Takenouchi, Riichiro Abe, “Widespread imiquimod-induced psoriasis-like eruption: case report and analysis of mast cell infiltration,” Clinical and Experimental Dermatology, Volume 50, Issue 6, June 2025, Pages 1221–1224, is available online at: https://doi.org/10.1093/ced/llae527
Body movements during early stages of chick embryo under intermittent low oxygen environment
No full textAn Investigation into the Ecology and Evolution of Caterpillar Eyespots
No full textEyespots are conspicuous circular patterns on the body of an animal which superficially resemble vertebrate eyes. These odd markings have long captured the interest of biologists and naturalists alike, many of whom have suggested that eyespots mimic the real eyes of dangerous animals and thereby protect prey species from their attackers. Eyespots are particularly widespread and diverse in lepidopteran caterpillars, and these caterpillars with eyespots are typically assumed to be snake-mimics. Yet a dearth of empirical investigation has left us without evidence that eyespots can protect caterpillars, or the ability to substantiate our subjective belief that these caterpillars are mimicking snakes. Using a combination of field and lab experiments my research provides robust empirical evidence demonstrating that eyespots are an adaptation in caterpillars, but reveals that other factors, including body colour and body size, influence their efficacy as a deterrent. Moreover, my work reveals that the defensive posture, which many caterpillars with eyespots adopt when harassed, also provides protection independent from the possession of eyespots. Using an objective measure of mimetic fidelity I showed that this defensive posture is likely a form of behavioural mimicry which increases the caterpillar’s resemblance to viperine snakes when viewed dorsally. Caterpillars from three distinct families showed analogous behavioural mimicry, suggesting strong selection for convergent phenotypes across lepidopteran larvae. Finally I provide an explanation for why some caterpillars have eyespots, and others do not. I show that body size critically influences the evolution of eyespots using a phylogenetically-controlled analysis of Macroglossinae (Sphingidae) caterpillar traits. Using field and lab experiments I reveal that the protective value of eyespots to caterpillars is in fact size-dependent: eyespots are only intimidating to attackers when on large-bodied prey that are already easy to detect, yet eyespots hinder small prey by making them easy to detect and failing to intimidate attackers. I argue that caterpillar eyespots have evolved to serve a mimetic function and were generated and are currently maintained by the innate fear of predator eyes harboured to varying degrees by numerous species of insect-eating birds
Seismometer using a vertical long natural-period rotational pendulum with magnetic levitation
No full textWideband Short-Period Seismometer using a Laser Interferomete
No full textA wideband short-period seismometer using a laser interferometer has been developed. A component of horizontal acceleration is sensed by a Michelson interferometer comprising a suspended mirror in combination with a fixed reference mirror. The minimum measurable displacement with this seismometer is 3 X 10-11 m/√Hz at 1 Hz and 2 X10 -15 m/√Hz above 2 kHz. Some observations of microtremor showed the sensitivity of the instrument was sufficient to detect signal even at the quiet site， Kamioka Mine (1，000 m underground)， and their displacement spectral density had typical trends inversely proportional to square of vibration frequencies.＜論説
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