78,860 research outputs found
Chen, M.-J., Han, Y.-R., Hu, J.-X., Liu, Y.-J. & Huang, B. (2023) Tolypocladium rhizomatum sp. nov.: an endophytic species isolated from the rhizome of Polygonatum cyrtonema. Phytotaxa 606 (3): 201-210.
No full textChen, M.-J., Han, Y.-R., Hu, J.-X., Liu, Y.-J., Huang, B. (2023): Chen, M.-J., Han, Y.-R., Hu, J.-X., Liu, Y.-J. & Huang, B. (2023) Tolypocladium rhizomatum sp. nov.: an endophytic species isolated from the rhizome of Polygonatum cyrtonema. Phytotaxa 606 (3): 201-210. Phytotaxa 607 (1): 114-114, DOI: 10.11646/phytotaxa.607.1.10, URL: http://dx.doi.org/10.11646/phytotaxa.607.1.1
A new cohesive model for simulating delamination propagation in composite laminates under transverse loads
No full textIn this paper, we propose a new cohesive model to stably and accurately simulate the\ud
delamination propagations in composite laminates under quasi-static and low-velocity\ud
impact transverse loads using comparatively coarse meshes. In this model, a pre-softening\ud
zone ahead of the existing traditional softening zone is proposed. In this pre-softening zone,\ud
the initial stiffnesses and the interface strengths at the integration points of cohesive elements\ud
are gradually reduced as the corresponding effective relative displacements at these\ud
points increase. However, the onset displacement corresponding to the onset damage is\ud
not changed in this model. Moreover, the fracture toughness of materials for determining\ud
the final displacement of complete decohesion is kept constant. This cohesive model is\ud
implemented in the explicit time integration scheme combined with a powerful threedimensional\ud
(3D) hybrid finite element for evaluating the delamination propagations on\ud
interfaces in composite laminates. A DCB problem is employed to analyze the characteristics\ud
of the present cohesive model. In order to reduce the computational cost for dealing\ud
with more complex problems, a stress-based criterion is also adopted in our numerical\ud
model for evaluating various in-plane damages, such as matrix cracks, fiber breakage,\ud
etc. Finally, two experimental examples are employed to illustrate the validity of the present\ud
approach
Cultural heritage on social media: the case of the National Museum of Science and Technology Leonardo da Vinci in Milan
No full textThe objective of this study is to understand the role of digital technologies and social media in the communication between museums and visitors. We conducted a systematic review to understand the most important dimensions of the relationship between visitors and museums on social media, and the opportunities provided by these touchpoints to interact with their target. In the empirical part, we adopted the case study methodology in order to analyze the digital communications strategy of the National Museum of Science and Technology Leonardo da Vinci based in
Milan
Uniform Bahadur Representation for Local Polynomial Estimates of M-Regression and Its Application to The Additive Model
No full textWe use local polynomial fitting to estimate the nonparametric M-regression function for strongly mixing
stationary processes {(Yi,Xi)}. We establish a strong uniform consistency rate for the Bahadur representation
of estimators of the regression function and its derivatives. These results are fundamental for
statistical inference and for applications that involve plugging in such estimators into other functionals
where some control over higher order terms are required. We apply our results to the estimation of an
additive M-regression model
Preface in RuleML2012@ECAI Challenge and Doctoral Consortium 6th International Rule Challenge
No full textThis volume collects the four selected contributions of the
RuleML2012 Doctoral Consortium and the twelve demo papers
accepted for presentation at the RuleML2012 Challenge.
The RuleML Doctoral Consortium is part of the RuleML
International Symposium on Rules, and is intended to attract Ph.D.
researchers in the area of Rules and Markup Languages, from different
backgrounds (e.g. theoretical, application, vertical domain-specific), to
encourage a constructive and fruitful interdisciplinary approach.
The 6th RuleML International Symposium on Rules
(RuleML2012@ECAI), took place on August 27th, 2012 in
Montpellier, France. The RuleML Challenge was included in the
symposium for the 6th time. The Rule Challenge is devoted to
disseminating the most advanced practical experiences with rule-based
applications, where state-of-the-art solutions and recent research
proposals meet the concrete needs of the market
Agelosus auricomus Smetana & Hu 2019
No full textAgelosus auricomus Smetana & Hu, 2019 (Figs. 3, 50) Material examined. TAIWAN: New Taipei City: 1 female, Guishan (ƟƜ), Wulai Dist., 24.9021, 121.5510, ca. 80m, 13-IV-2012, leg. L. C. Shih (FSHc). Nantou County: 1 spec., CCCC, Shihmenshan (ƂḋƜ), 03.III.2019. leg. S.-P. Wu (TARI). Yilan County: 1 male, Fushan Botanical Garden (AEƜ ḆṄṞ), Yunnan To., 26-II-2020, leg. S. S. Lu (FSHc). Diagnosis. Agelosus auricomus is the only species of the genus in Taiwan. It can be distinguished from most Staphylinina in Taiwan by the mandibles each with a subdental indentation. However, this character convergently evolved in the genus Nelmanwaslus Smetana, 2006. So far, only N. ornatus Smetana, 2006 has been found in Taiwan and is newly reported in this paper. Agelosus auricomus can be easily distinguished from N. ornatus by the patches of golden-yellow tomentose pubescence on the elytra (Fig. 3). Bionomics. Based on an import of locality name into Google Earth from collection data (Smetana & Hu 2019), Ag. auricomus occurs from 20– 800 m. Apparently, the species only occurs in the lowlands or low mountains. The specimen from Guishan was collected from the foot of a mountain near Nanshi River (ĦBữ). Smetana & Hu (2019) reported a specimen that was collected from under a stone in a valley in mixed wood forest. Distribution. Agelosus auricomus is at present known from Taiwan, including Nantou County, New Taipei City, Taipei City and Yilan County (Smetana & Hu 2019 and this study). The additional specimen from Nantou indicates that this species is perhaps widespread in Taiwan. Apecholinus fraternus Fairmaire, 1891 (Fig. 4) Material examined. TAIWAN: Hsinchu County: 1 spec., Talutrail (±ẘIJǎ), 01.VIII.2015, leg. Y.-L. Lin (TARI). Nantou County: 1 male, Meifeng (đø), Renai To., 05-VI-2019, leg. W. Z. Wang (FSHc). Diagnosis. Apecholinus fraternus can be distinguished from all other species of Apecholinus in Taiwan by the lack of golden-yellow or grey tomentose pubescence on the body. Bionomics. Based on an import of locality name into Google Earth from collection data (Hayashi 1978, Smetana 2018, Smetana & Hu 2019), Ap. fraternus occurs from 1400–2600 m in Taiwan. Some specimens of this species were collected by pitfall traps, but nothing known about the habitat the traps were set in (Smetana 2018, Smetana & Hu 2019). Smetana & Hu (2019) reported a specimen collected from under a rock near a creek. Distribution. Apecholinus fraternus is widespread in mainland China including Guangxi, Guizhou, Henan, Hubei, Hunan, Shaanxi, Sichuan and Yunnan. The species also widespread in Taiwan including Chiayi County, Hsinchu County, Hualien County, Nantou County and Taichung City (Smetana 2018, Smetana & Hu 2019). The specimen from Hsinchu represents the first specimen from northern Taiwan. Remarks. The name ‘ Agelosus fraternus ’ in the ‘Geographical distribution’ section of Ap. fraternus in Smetana & Hu (2019) should be corrected to ‘ Apecholinus fraternus ’.Published as part of Hu, Fang-Shuo, 2020, New distributional records of Staphylinina in Taiwan, including a new species of Miobdelus Sharp (Coleoptera: Staphylinidae: Staphylininae: Staphylinini), pp. 334-360 in Zootaxa 4768 (3) on pages 336-337, DOI: 10.11646/zootaxa.4768.3.2, http://zenodo.org/record/378403
Apecholinus imitator Smetana & Hu 2019
No full textApecholinus imitator Smetana & Hu, 2019 (Figs. 5–6) Material examined. TAIWAN: Pingtung County: 1 spec., Tahanshan (± ÀƜ), 25.IV.2017. leg. B.-X. Guo (TARI); 1 female, Chun-jih, Ta-han shan, ± ÀƜ, 1350m, 2019,V-13 (Night), Y.- T. Chung Leg. CCCC (FSHc); 1 female, Majia Forest Trail (ṞxIJǎ), Majia To., 28-VI-2017, leg. R. H. Liu (FSHc); 1 spec., CCCC, Tahanshan (± ÀƜ), 15.IV.2019. leg. Y.- T. Chung (TARI). Description. For male description see Smetana & Hu (2019). Female. Genital segment. Tergite 10 (Fig. 6) obviously different from male tergite 10. Apical portion of female tergite 10 markedly narrow and elongated, with narrow acute apical portion; setae are relatively concentrated on the apex. Diagnosis. Apecholinus imitator can be distinguished from all other species of Apecholinus in Taiwan by the golden-yellow tomentose setae on the body. An undescribed species of Apecholinus in Taiwan is similar to this species but it currently known only from a single female, so I refrain from describing it until male specimens are found. The patches of golden-yellow tomentose pubescence on the elytra of Ap. imitator are much larger than that of the undescribed species. Bionomics. Based on an import of locality name into Google Earth from collection data (Smetana & Hu 2019 and this study), the species occurs from 800–1700 m. One specimen of Ap. imitator was collected by pitfall trap but nothing known about the habitat the traps were set in; some specimens of Ap. imitator were attracted to an LED flashlight in the evening on a forest trail (Smetana & Hu 2019). Distribution. Apecholinus imitator is at present known from central and southern Taiwan including Nantou County, Taitung County and Pingtung County (Smetana & Hu 2019, this study). Remarks. Up to the present, the morphology of females in Apecholinus is poorly known. So far, only females of Ap. fraternus (see Smetana 2018), Ap. liui (He & Zhou, 2017) (see He & Zhou 2017) and Ap. kaiseri Bernhauer, 1933 (see Smetana 2003) had been described and female tergite 10 of these species is similar to that of the male. However, the apical portion of tergite 10 of Ap. imitator is much narrower and more elongate in females than in males.Published as part of Hu, Fang-Shuo, 2020, New distributional records of Staphylinina in Taiwan, including a new species of Miobdelus Sharp (Coleoptera: Staphylinidae: Staphylininae: Staphylinini), pp. 334-360 in Zootaxa 4768 (3) on page 337, DOI: 10.11646/zootaxa.4768.3.2, http://zenodo.org/record/378403
On Projective Threefolds Of General Type With Small Positive Geometric Genus
No full textIn this paper we study the pluricanonical maps of minimal projective 3-folds of general type with geometric genus 1, 2 and 3. We go in the direction pioneered by Enriques and Bombieri, and other authors, pinning down, for low projective genus, a finite list of exceptions to the birationality of some pluricanonical map. In particular, apart from a finite list of weighted baskets, we prove the birationality of φ16, φ6 and φ5 respectively
In-fiber subpicosecond pulse shaping for nonlinear optical telecommunication data processing at 640 Gbit/s
No full textWe review recent work on all-fiber (long-period fiber grating) devices for optical pulse shaping, particularly flat-top pulse generation, down to the subpicosecond range and their application for nonlinear switching (demultiplexing) of optical time-division multiplexed (OTDM) data signals in fiber-optic telecommunication links operating up to 640 Gbit/s. Experiments are presented demonstrating error-free 640-to-10 Gbit/s demultiplexing of the 64 tributary channels using the generated flat-top pulses for temporal gating in a Kerr-effect-based nonlinear optical loop mirror. The use of flat-top pulses has critical benefits in the demultiplexing process, including a significantly increased timing-jitter tolerance (up to ~500 fs, i.e., 30% of the bit period) and the associated improvement in the bit-error-rate performance (e.g., with a sensitivity increase of up to ~13 dB as compared with the use of Gaussian-like gating pulses). Long-period fiber grating pulse shapers with reduced polarization dependence are fabricated and successfully used for polarization-independent 640-to-10 Gbit/s demultiplexing experiments
Machine learning-based algorithm for SAR wave parameters retrieval during a tropical cyclone
No full textThe major objective of our research is to retrieve wave parameters from synthetic aperture radar (SAR) images during a tropical cyclone (TC) based on a machine learning method. In this study, more than 2000 Sentinel-1 (S-1) images obtained in interferometric-wide (IW) and extra wide (EW) mode are collected during 200 tropical cyclones (TCs), which are collocated with hindcasted waves by a third-generation numeric model, namely WAVEWATCH-III (WW3). It is found that wave parameters, i.e., SWH, MWP and MWL, are correlated with several SAR-measured image variables. Based on these findings, a machine learning method, namely eXtreme Gradient Boosting (XGBoost), is developed through the training dataset using 1600 images. The trained algorithm is tested over 400 images and the retrievals are compared with WW3 simulations. The statistical analysis shows that the root mean squared error (RMSE) and scatter index (SI) of significant wave height (SWH) are 0.19 m and 0.06 respectively. The RMSE and SI of mean wave period (MWP) are 0.19 s and 0.03 respectively. The RMSE of the mean wave length (MWL) is 3.77 m and the SI is 0.04. Comparisons between inverted SWH by XGBoost methods and the altimeter measurements presents a 0.59 m RMSE of SWH with and 0.19 SI. This result is improved comparing to the results (i.e., a 1.44 m RMSE of SWH with a 0.45 SI) achieved by a previous algorithm. Collectively, it is considered that machine learning is a valuable method to extract wave parameters from dual-polarization SAR images
- …
