cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Metodología para analizar gobernanza colaborativa como respuesta a conflictos socioambientales: Contaminación de Lago Villarrica (Chile)
Creators: name: Simon, Jeanne
Publisher: name: figshare
Year: 2021
Subjects: subject: 160605 Environmental Politics
subject: FOS: Political science
subject: 160599 Policy and Administration not elsewhere classified

description: El Lago Villarrica, uno de los lagos más emblemáticos del sur de Chile, ha sufrido durante décadas contaminación por diversas actividades humanas. A pesar de diversos esfuerzos públicos y privados para reducir las externalidades negativas durante años, no se pudo revertir el deterioro en la calidad de agua. Se presenta como un caso donde hay numerosos actores productivos cuyas actividades afectan a las aguas que llegan finalmente al lago, como son las pisciculturas, planta de tratamiento de aguas servidas y actividades asociadas con el turismo como las termas; además, hay varios sectores en la cuenca sin infraestructura sanitaria, generando un aporte difuso de contaminantes (MMA-UFRO 2019).el presente artículo propone y aplica una metodología para analizar el proceso de gobernanza colaborativa realizado para elaborar el Plan de Descontaminación del Lago Villarrica. En la primera parte, se establecen los criterios centrales que deben considerar un proceso de gobernanza colaborativa que facilitará la gestión de dicho Plan para su duración de 15 años. Después de presentar la metodología propuesta, se analiza el diseño del proceso y el funcionamiento de los dos comités establecidos para visibilizar la co-construcción de una comprensión compartida de las causas del problema y su solución. Se concluye con recomendaciones para mejorar el diseño y funcionamiento.
Level Splitting in Association with the Multiphoton Bloch-Siegert Shift
Creators: name: Hagelstein, Peter L.
name: Chaudhary, Irfan U.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a unitary equivalent spin-boson Hamiltonian in which terms can be identified which contribute to the Bloch-Siegert shift, and to the level splittings at the anticrossings associated with the Bloch-Siegert resonances. First-order degenerate perturbation theory is used to develop approximate results in the case of moderate coupling for the level splitting.
description: 8 pages, 2 figures
Cephennium perispinctum
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Cephennium
Cephennium perispinctum

description: Cephennium perispinctum group
In the Iberian Peninsula, this group is represented by at least six described species. For characters constituting this group see ASSING & MEYBOHM (in press). The Iberian distributions of the representatives of this group are confined to North Spain.
description: Published as part of Assing, Volker, 2021, On the Cephennium fauna of the Iberian Peninsula and the Atlantic Islands (Coleoptera, Staphylinidae, Scydmaeninae), pp. 891-931 in Linzer biologische Beiträge 52 (2) on page 895, DOI: 10.5281/zenodo.5039032
Graphene quantum dots: Beyond a Dirac billiard
Creators: name: Libisch, F.
name: Stampfer, C.
name: Burgdörfer, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present realistic simulations of quantum confinement effects in ballistic graphene quantum dots with linear dimensions of 10 to 40 nm. We determine wavefunctions and energy level statistics in the presence of disorder resulting from edge roughness, charge impurities, or short-ranged scatterers. Marked deviations from a simple Dirac billiard for massless fermions are found. We find a remarkably stable dependence of the nearest-neighbor level spacing on edge roughness suggesting that the roughness of fabricated devices can be potentially characterized by the distribution of measured Coulomb blockade peaks.
description: 5 figures, higher resolution available upon request
DECIFE: Detecting Collusive Users Involved in Blackmarket Following Services on Twitter
Creators: name: Dutta, Hridoy Sankar
name: Aggarwal, Kartik
name: Chakraborty, Tanmoy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: The popularity of Twitter has fostered the emergence of various fraudulent user activities - one such activity is to artificially bolster the social reputation of Twitter profiles by gaining a large number of followers within a short time span. Many users want to gain followers to increase the visibility and reach of their profiles to wide audiences. This has provoked several blackmarket services to garner huge attention by providing artificial followers via the network of agreeable and compromised accounts in a collusive manner. Their activity is difficult to detect as the blackmarket services shape their behavior in such a way that users who are part of these services disguise themselves as genuine users. In this paper, we propose DECIFE, a framework to detect collusive users involved in producing 'following' activities through blackmarket services with the intention to gain collusive followers in return. We first construct a heterogeneous user-tweet-topic network to leverage the follower/followee relationships and linguistic properties of a user. The heterogeneous network is then decomposed to form four different subgraphs that capture the semantic relations between the users. An attention-based subgraph aggregation network is proposed to learn and combine the node representations from each subgraph. The combined representation is finally passed on to a hypersphere learning objective to detect collusive users. Comprehensive experiments on our curated dataset are conducted to validate the effectiveness of DECIFE by comparing it with other state-of-the-art approaches. To our knowledge, this is the first attempt to detect collusive users involved in blackmarket 'following services' on Twitter.
Enhancing the predictive performance of remote sensing for ecological variables of tidal flats using encoded features from a deep learning model
Creators: name: Madhuanand, Logambal
name: Philippart, Catharina J. M.
name: Wang, Jiong
name: Nijland, Wiebe
name: de Jong, Steven M.
name: Bijleveld, Allert I.
name: Addink, Elisabeth A.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Astronomical and Space Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Tidal flats are among the ecologically richest areas of the world where sediment composition (e.g. median grain size and silt content) and the macrozoobenthic presence play an important role in the health of the ecosystem. Regular monitoring of environmental and ecological variables is essential for sustainable management of the area. While monitoring based on field sampling is very time-consuming, the predictive performance of these variables using satellite images is low due to the spectral homogeneity over these regions. We tested a novel approach that uses features from a variational autoencoder (VAE) model to enhance the predictive performance of remote sensing images for environmental and ecological variables of tidal flats. The model was trained using the Sentinel-2 spectral bands to reproduce the input images, and during this process, the VAE model represents important information on the tidal flats within its layer structure. The information in the layers of the trained model was extracted to form features with identical spatial coverage to the spectral bands. The features and the spectral bands together form the input to random forest models to predict field observations of the sediment characteristics such as median grain size and silt content, as well as the macrozoobenthic biomass and species richness. The maximum prediction accuracy of feature-based maps was close to 62% for the sediment characteristics and 37% for benthic fauna indices. The encoded features improved the prediction accuracy of the random forest regressor model by 15% points on average in comparison to using just the spectral bands. Our method enhances the predictive performance of remote sensing, in particular the spatiotemporal dynamics in median grain size and silt content of the sediment thereby contributing to better-informed management of coastal ecosystems.
Electromagnetic energy flow lines as possible paths of photons
Creators: name: Davidovic, M.
name: Sanz, A. S.
name: Arsenovic, D.
name: Bozic, M.
name: Miret-Artes, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Motivated by recent experiments where interference patterns behind a grating are obtained by accumulating single photon events, here we provide an electromagnetic energy flow-line description to explain the emergence of such patterns. We find and discuss an analogy between the equation describing these energy flow lines and the equation of Bohmian trajectories used to describe the motion of massive particles.
description: 8 pages, 3 figures
Hamiltonian Theory of Adiabatic Motion of Relativistic Charged Particles
Creators: name: Tao, Xin
name: Chan, Anthony
name: Brizard, Alain
Publisher: name: arXiv
Year: 2007
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: A general Hamiltonian theory for the adiabatic motion of relativistic charged particles confined by slowly-varying background electromagnetic fields is presented based on a unified Lie-transform perturbation analysis in extended phase space (which includes energy and time as independent coordinates) for all three adiabatic invariants. First, the guiding-center equations of motion for a relativistic particle are derived from the particle Lagrangian. Covariant aspects of the resulting relativistic guiding-center equations of motion are discussed and contrasted with previous works. Next, the second and third invariants for the bounce motion and drift motion, respectively, are obtained by successively removing the bounce phase and the drift phase from the guiding-center Lagrangian. First-order corrections to the second and third adiabatic invariants for a relativistic particle are derived. These results simplify and generalize previous works to all three adiabatic motions of relativistic magnetically-trapped particles.
description: 20 pages, LaTeX, to appear in Physics of Plasmas (Aug, 2007)
Contemporary and historical detection of small lakes using super resolution Landsat imagery: promise and peril
Creators: name: Kyzivat, Ethan D.
name: Smith, Laurence. C
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Information Systems not elsewhere classified
subject: Cancer
subject: Plant Biology

description: Landsat is the longest-running environmental satellite program and has been used for surface water mapping since its launch in 1972. However, its sustained 30 m resolution since 1982 prohibits the detection of small water bodies, which are globally far more prevalent than large. Remote sensing image resolution is increasingly being enhanced through single image super resolution (SR), a machine learning task typically performed by neural networks. Here, we show that a 10× SR model (Enhanced Super Resolution Generative Adversarial Network, or ESRGAN) trained entirely with Planet SmallSat imagery (3 m resolution) improves the detection of small and sub-pixel lakes in Landsat imagery (30 m) and produces images (3 m resolution) with preserved radiometric properties. We test the utility of these Landsat SR images for small lake detection by applying a simple water classification to SR and original Landsat imagery and comparing their lake counts, sizes, and locations with independent, high-resolution water maps made from coincident airborne camera imagery. SR images appear realistic and have fewer missed detections (type II error) compared to low resolution (LR), but exhibit errors in lake location and shape, and yield increasing false detections (type I error) with decreasing lake size. Even so, lakes between ~500 and ~10,000 m2 in area are better detected with SR than with native-resolution Landsat 8 imagery. SR transformation achieves an F-1 score for water detection of 0.75 compared to 0.73 from native resolution Landsat. We conclude that SR enhancement improves the detection of small lakes sized several Landsat pixels or less, with a minimum mapping unit (MMU) of ~ 2/3 of a Landsat pixel – a significant improvement from previous studies. We also apply the SR model to a historical Landsat 5 image and find similar performance gains, using an independent 1985 air photo map of 242 small Alaskan lakes. This demonstration of retroactively generated 3 m imagery dating to 1985 has exciting applications beyond water detection and paves the way for further SR land cover classification and small object detection from the historical Landsat archive. However, we caution that the approach presented is suitable for landscape-scale inventories of lake counts and lake size distributions, but not for specific geolocational positions of individual lakes. Much work remains to be done surrounding technical and ethical guidelines for the creation, use, and dissemination of SR satellite imagery.
An investigation of the origin of soft X-ray excess emission from Narrow-line Seyfert 1 galaxies Akn564 and Mrk1044
Creators: name: Dewangan, G. C.
name: Griffiths, R. E.
name: Dasgupta, Surajit
name: Rao, A. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the origin of the soft X-ray excess emission from narrow-line Seyfert 1 galaxies Akn564 and Mrk1044 using XMM-Newton observations. We find clear evidence for time delays between the soft and hard X-ray emission from Akn564 based on a 100ks long observation. The variations in the 4-10keV band lag behind that in the 0.2-0.5keV band by 1768+/-122s. The full band power density spectrum (PDS) of Akn~564 has a break at ~1.2e-3Hz with power-law indices of ~1 and ~3 below and above the break. The hard (3-10keV) band PDS is stronger and flatter than that in the soft (0.2-0.5keV) band. Based on a short observation of Mrk1044, we find no correlation between the 0.2-0.3keV and 5-10keV bands at zero lag. These observations imply that the soft excess is not the reprocessed hard X-ray emission. The high resolution spectrum of Akn564 obtained with the RGS shows evidence for a highly ionized and another weakly ionized warm absorber medium. The smeared wind and blurred ionized reflection models do not describe the pn data adequately. The spectrum is consistent with a complex model consisting of optically thick Comptonization in a cool plasma for the soft excess and a steep power-law, modified by two warm absorber media as inferred from the RGS data and the foreground Galactic absorption. The smeared wind and optically thick Comptonization models both describe the spectrum of Mrk1044 satisfactorily, but the ionized reflection model requires extreme parameters. The data suggest two component corona -- a cool, optically thick corona for the soft excess and a hot corona for the power-law component. The existence of a break in the soft band PDS suggests a compact cool corona that can either be an ionized surface of the inner disk or an inner optically thick region coupled to a truncated disk.
description: Accepted for publication in ApJ, 19 pages
The effect of different musical timbres on students’ identification of melodic intervals
Creators: name: Hinton, Dallas Edward
Publisher: name: University of British Columbia
Year: 2010

description: Musical timbre, an attribute of musical tone, is seldom considered to play an important part in pitch identification. College/university music students routinely are given ear training, i.e., are taught to identify intervals and chords from dictation, as part of their regular harmony or theory classes. For this exploratory study five hypotheses were formulated, stating that ability to identify melodic intervals during music dictation is not affected by differences in timbre, the use of familiar or unfamiliar timbres (MAJOR), formal ear training experience (FETE), or playing/performing experience on an instrument (PPEM), and that there is no significant interaction between PPEM and FETE. Melodic intervals were presented in random order by six instruments: clarinet, trumpet, piano, violin, xylophone, and synthesizer (sine waveform). Each instrument played twelve randomly assorted melodic intervals, based on C4 and not exceeding one octave. The independent variables were MAJOR instrument, FETE, and PPEM. The dependent measures were the scores achieved on an author-written melodic interval dictation test closely resembling the "typical" ear training quiz used in many college/university music theory classes. A multivariate analysis of variance (MANOVA) was used for an analysis of PPEM (three levels) compared with FETE (three levels). A second MANOVA analysis was used for MAJOR. Appropriate Scheffe post hoc analyses were carried out. It was found, that the amount of playing/performing experience affected subjects' scores on the dependent variables, but only for those subjects with more than ten years of PPEM. The amount of formal ear training experience also significantly affected subjects' scores, but there was no clear pattern discernible. Both PPEM and FETE interacted with the dependent variables to produce pairwise differences at various levels of each independent variable. No significant interaction between PPEM and FETE was found. There were statistically significant differences among the various, levels .of the declared MAJOR instruments, but no clear pattern was found. It was concluded that FETE, PPEM, and MAJOR all affected subjects' scores on intervals presented with different timbres.
Lorentz symmetry and high-energy neutrino astronomy
Creators: name: Argüelles, Carlos A.
name: Katori, Teppei
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The search of violation of Lorentz symmetry, or Lorentz violation (LV), is an active research field. The effects of LV are expected to be very small and special systems are often used to search it. High-energy astrophysical neutrinos offer a unique system to search signatures of LV due to the three factors: high neutrino energy, long propagation distance, and the presence of quantum mechanical interference. In this brief review, we introduce tests of LV and summarize existing searches of LV using atmospheric and astrophysical neutrinos.
description: 9 pages, 3 figures, accepted version for the special issue "Neutrinos from Astrophysical Sources" in the online journal "Universe" (ISSN 2218-1997)
Cephennium gallicum GANGLBAUER 1899
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Cephennium
Cephennium gallicum

description: Cephennium gallicum GANGLBAUER, 1899
Material examined: SPAIN: 11♂♂, 3♀♀, Castilla y León, 40 km E Burgos, NE Valmala, 42°18'N, 3°16'W, 1190 m, oak forest, 12.X.2003, leg. Assing (cAss); 3♀♀, Sierra de la Demanda, valley of Valvanera monastery, 1.VIII.1971 (cAss); 1♀, Lagroño, Villoslada de Cameros, 31.VII.1971 (cAss); 4♂♂, 2♀♀, Cataluña, N Barcelona, Sierra de Montseny, 1500-1700 m, 26.V.1982, leg. Ulbrich (cAss).
Iberian material examined by C. Besuchet (unpubl.; material deposited in MHNG and several other collections): SPAIN: Cataluña: 3 exs., N Barcelona, Sierra de Montseny, leg. Liebmann, Zariquiey; 2 exs., Sierra de Montseny, Santa Fe, leg. Vives. La Rioja: 3ex., Sierradela Demanda, valley of Valvanera monastery, leg. Franz; 5 exs., Logroño, Valvanera monastery, leg. Besuchet; 1 ex., Logroño, Anguiano, leg. Besuchet. Castilla y León: 1ex., Burgos, Puerto El Collado, leg. Besuchet. Cantabria: 5 exs., Santander, Santoña, leg. Besuchet (MHNG); 2 exs., Santander, Liendo env., Monte de Candina, leg. Besuchet; 6 exs., San Sebastian, pass between Elgoibar and Azcoitia, leg. Besuchet.
This species is widespread and common in West, Southwest, and Central Europe. In the Iberian Peninsula it appears to be confined to the north, from Cantabria in the west to Cataluña in the east. Aside from the specimens listed above, Besuchet (unpublished) examined abundant material from numerous localities in France, Britain, and Central Europe. For numerous published records from France and illustrations of the male primary and secondary sexual characters see OROUSSET (2017).
description: Published as part of Assing, Volker, 2021, On the Cephennium fauna of the Iberian Peninsula and the Atlantic Islands (Coleoptera, Staphylinidae, Scydmaeninae), pp. 891-931 in Linzer biologische Beiträge 52 (2) on page 896, DOI: 10.5281/zenodo.5039032
Fragmentation of Positronium (Ps) in collision with Li ion
Creators: name: Roy, S.
name: Sinha, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Fragmentation of ground state ortho Positronium (Ps) in collision with Li ion (Li+) is studied in the framework of post collisional Coulomb distorted eikonal approximation (CDEA) for the target elastic case . The present model takes account of the two center effect on the ejected e which is crucial for a proper description of the projectile ionization involving an ionic target. Both the fully differential (TDCS) and the doubly differential (DDCS) cross sections (energy spectra) are investigated at intermediate and high incident energies. A broad distinct Electron loss peak (ELP) centered around v_e ~ v_p is noted in the e energy spectrum in contrast to the sharp ELP for a heavy projectile. Two salient features are noted in the present study: i) the shift of the e DDCS peak (summed over e+ angles) towards higher ejection energy with respect to half the residual energy of the system, ii) comparison of the e& e+ energy spectra reflect a strong e - e+ asymmetry with respect to the ratio v_e/v_p =1 >. Both these features could be attributed to the post collisional two center effect on the e due to its parent nucleus (e+) and the screened target ion . Two different wave functions of the Li ion are chosen in order to test the sensitivity of the present results with respect to the choice of the wave function.
description: 19 pages, 7 figures
Assessing Combinations of Landsat, Sentinel-2 and Sentinel-1 Time series for Detecting Bark Beetle Infestations
Creators: name: König, Simon
name: Thonfeld, Frank
name: Förster, Michael
name: Dubovyk, Olena
name: Heurich, Marco
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Plant Biology

description: Bark beetle infestations are among the most substantial forest disturbance agents worldwide. Moreover, as a consequence of global climate change, they have increased in frequency and in the size and number of affected areas. Controlling bark beetle outbreaks requires consistent operational monitoring, as is possible using satellite data. However, while many satellite-based approaches have been developed, the full potential of dense, multi-sensor time series has yet to be fully explored. Here, for the first time, we used all available multispectral data from Landsat and Sentinel-2, Sentinel-1 SAR data, and combinations thereof to detect bark beetle infestations in the Bavarian Forest National Park. Based on a multi-year reference dataset of annual infested areas, we assessed the separability between healthy and infested forests for various vegetation indices calculated from the satellite data. We used two approaches to compute infestation probability time series from the different datasets: Bayesian conditional probabilities, based on the best-separating index from each satellite type, and random forest regression, based on all indices from each satellite type. Five different sensor configurations were tested for their detection capabilities: Landsat alone, Sentinel-1 alone, Sentinel-2 alone, Landsat and Sentinel-2 combined, and data from all satellite types combined. The best overall results in terms of spatial accuracy were achieved with Sentinel-2 (max. overall accuracy: 0.93). The detections of Sentinel-2 also were the closest to the onset of infestation estimated for each year. Sentinel-2 detected infested areas in larger contiguous patches with higher reliability compared to smaller patches. The results achieved with Landsat were somewhat inferior to those of Sentinel-2 (max. accuracy: 0.89). While yielding similar results, the combination of Landsat and Sentinel-2 did not provide any advantages over using Landsat or Sentinel-2 alone (max. accuracy: 0.87), while Sentinel-1 was unable to detect infested areas (max. accuracy: 0.62). The combined data of all three satellite types did not achieve satisfactory results either (max. accuracy: 0.67). Spatial accuracies were typically higher for Bayesian conditional probabilities than for random forest-derived probabilities, but the latter resulted in earlier detections. The approach presented herein provides a flexible disturbance detection pipeline well-suited for the monitoring of bark beetle outbreaks. Furthermore, it can also be applied to other disturbance types.
Information System for Satellite Data Acquisition, Archiving and Analysis as an Instrument for Monitoring of Objects of Artificial and Natural Origin
Creators: name: Shokin, Yurii
name: Pestunov, Igor
name: Chubarov, Dmitri
name: Kikhtenko, Vladimir
name: Mamash, Elena
name: Dobretsov, Nick
name: Voronina, Polina
name: Sinyavskiy, Yuriy
Publisher: name: figshare
Year: 2021
Subjects: subject: 90905 Photogrammetry and Remote Sensing
subject: FOS: Environmental engineering
subject: 50206 Environmental Monitoring
subject: FOS: Earth and related environmental sciences

description: We review the architecture and general operating principles of the system for satellite data acquisition, archiving, and analysis as it is implemented at the Institute of Computational Technologies of the Siberian Branch of the Russian Academy of Sciences. Based upon our experience of using the system we discuss its applications in different scientific and technical domains.

Presented at Spatial Data Processing for Monitoring of Natural and Anthropogenic Processes" (SDM-2019), Berdsk, Russia August 26-30, 2019
Structures and physical properties of V-based kagome metals CsV$_{6}$Sb$_{6}$ and CsV$_{8}$Sb$_{12}$
Creators: name: Yin, Qiangwei
name: Tu, Zhijun
name: Gong, Chunsheng
name: Tian, Shangjie
name: Lei, Hechang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report two new members of V-based kagome metals CsV$_{6}$Sb$_{6}$ and CsV$_{8}$Sb$_{12}$. The most striking structural feature of CsV$_{6}$Sb$_{6}$ is the V kagome bilayers. For CsV$_{8}$Sb$_{12}$, there is an intergrowth of two-dimensional V kagome layers and one-dimensional V chains and the latter lead to the orthorhombic symmetry of this material. Further measurements indicate that these two materials exhibit metallic and Pauli paramagnetic behaviors. More importantly, different from CsV$_{3}$Sb$_{5}$, the charge density wave state and superconductivity do not emerge in CsV$_{6}$Sb$_{6}$ and CsV$_{8}$Sb$_{12}$ when temperature is above 2 K. Small magnetoresistance with saturation behavior and linear field dependence of Hall resistivity at high field and low temperature suggest that the carriers in both materials should be uncompensated with much different concentrations. The discovery of these two new V-based kagome metals sheds light on the exploration of correlated topological materials based on kagome lattice.
description: 7 pages, 4 figures, 2 tables
First Evidence of Intrinsic Alignments of Red Galaxies at $z > 1$: Cross-correlation between CFHTLenS and FastSound Samples
Creators: name: Tonegawa, Motonari
name: Okumura, Teppei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the first evidence for intrinsic alignment (IA) of red galaxies at $z>1$. We measure the gravitational shear-intrinsic ellipticity (GI) cross-correlation function at $z\sim1.3$ using galaxy positions from the FastSound spectroscopic survey and galaxy shapes from Canada-Hawaii-France telescope lensing survey data. Adopting the non-linear alignment model, we obtain a $2.4σ$-level detection of the IA amplitude $A^{\rm LA}=27.48_{-11.54}^{+11.53}$ (and $2.6σ$ with $A^{\rm LA}=29.43_{-11.49}^{+11.48}$ when weak-lensing contaminations are taken into account), which is larger than the value extrapolated from the constraints obtained at lower redshifts. Our measured IA is translated into a $\sim 20\%$ contamination to the weak lensing power spectrum for the red galaxies. This marginal detection of IA for red galaxies at $z>1$ motivates the continuing investigation of the nature of IA for weak lensing studies. Furthermore, our result provides the first step to utilize IA measurements in future high-$z$ surveys as a cosmological probe, complementary to galaxy clustering and lensing.
description: 10 pages,1 table, 3 figures. Accepted for publication in ApJL
Hadronic Momentum Densities in the Transverse Plane
Creators: name: Abidin, Zainul
name: Carlson, Carl E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the spatial density within extended objects of the momentum component $p^+$, and find relativistically exact connections to Fourier transforms of gravitational form factors. We apply these results to obtain semi-empirical momentum density distributions within nucleons, and similar distributions for spin-1 objects based on theoretical results from the AdS/QCD correspondence. We find that the momentum density in the transverse plane is more compact than the charge density.
description: 4 pages, 2 figures
Seven-year variation in glacier surface velocity at Narsap Sermia in Southwest Greenland
Creators: name: Jung, Seong-Woo
name: Hong, Sang-Hoon
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Astronomical and Space Sciences not elsewhere classified
subject: Virology

description: Glacier velocity is a critical factor closely related to ice dynamics of the Greenland ice sheet (GrIS). We present variations of ice velocity using space-based synthetic aperture radar (SAR) observations from July 2013 to September 2020. We focus on a tidewater outlet glacier of Narsap Sermia (NS), located in southwest Greenland, which is experiencing significant ice loss. A time series of high spatiotemporal resolution maps of ice velocity was traced by using an offset tracking approach with seven-year SAR acquisitions to understand glacier dynamics in time. We observed seasonal variations showing a dramatic increase in late spring (May) and early summer (June) followed by a sharp decrease in late summer (September). The seasonal variation was confirmed through Seasonal and Trend decomposition using Loess (STL) analysis. Overall, the NS glacier experienced a gradual speed-up of ice velocities. The ice velocity increased by 0.1–0.3 km/year from 2015 to 2017, then after a temporary decrease in 2018, the velocity moved faster by 0.9 km/year in 2020. The speed of glacier movement accelerated as it approached the tidal terminus of the glacier, showing approximately 6.0 km/year in 2020. The ice speed in 2020 increased by 0.9 km/year at the terminus region compared with 2014. We also discuss the relationship between the glacier velocity and temperature data such as air, land surface, and sea surface temperatures.
A first order dark $SU(2)_D$ phase transition with vector dark matter in the light of NANOGrav 12.5 yr data
Creators: name: Borah, Debasish
name: Dasgupta, Arnab
name: Kang, Sin Kyu
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study a dark $SU(2)_D$ gauge extension of the standard model (SM) with the possibility of a strong first order phase transition (FOPT) taking place below the electroweak scale in the light of NANOGrav 12.5 yr data. As pointed out recently by the NANOGrav collaboration, gravitational waves (GW) from such a FOPT with appropriate strength and nucleation temperature can explain their 12.5 yr data. We impose a classical conformal invariance on the scalar potential of $SU(2)_D$ sector involving only a complex scalar doublet with negligible couplings with the SM Higgs. While a FOPT at sub-GeV temperatures can give rise to stochastic GW around nano-Hz frequencies being in agreement with NANOGrav findings, the $SU(2)_D$ vector bosons which acquire masses as a result of the FOPT in dark sector, can also serve as dark matter (DM) in the universe. The relic abundance of such vector DM can be generated in a non-thermal manner from the SM bath via scalar portal mixing. We also discuss future sensitivity of gravitational wave experiments to the model parameter space.
description: 10 pages, 6 captioned figures. accepted for publication in JCAP. arXiv admin note: substantial text overlap with arXiv:2105.01007
Double Coronal Hard and Soft X-ray Source Observed by RHESSI: Evidence for Magnetic Reconnection and Particle Acceleration in Solar Flares
Creators: name: Liu, Wei
name: Petrosian, Vahe'
name: Dennis, Brian R.
name: Jiang, Yan Wei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present data analysis and interpretation of an M1.4-class flare observed with the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) on April 30, 2002. This event, with its footpoints occulted by the solar limb, exhibits a rarely observed, but theoretically expected, double-source structure in the corona. The two coronal sources, observed over the 6-30 keV range, appear at different altitudes and show energy-dependent structures with the higher-energy emission being closer together. Spectral analysis implies that the emission at higher energies in the inner region between the two sources is mainly nonthermal, while the emission at lower energies in the outer region is primarily thermal. The two sources are both visible for about 12 minutes and have similar light curves and power-law spectra above about 20 keV. These observations suggest that the magnetic reconnection site lies between the two sources. Bi-directional outflows of the released energy in the form of turbulence and/or particles from the reconnection site can be the source of the observed radiation. The spatially resolved thermal emission below about 15 keV, on the other hand, indicates that the lower source has a larger emission measure but a lower temperature than the upper source. This is likely the result of the differences in the magnetic field and plasma density of the two sources.
description: Accepted by ApJ (12/06/2007), scheduled for the 03/20/2008 Vol. 676 No. 1 Issue, 13 pages, 9 figures
“Come qualcuno che mi spia di nascosto”
Creators: name: Giovannetti, Giovanni
Publisher: name: La Rivista di Engramma
Year: 2021
Subjects: Pasolini
pictures
Petrolio
Reali
Mattei
Cefis
Valletta
Henke

description: The article presents some examples of the iconographic apparatus/set that could have appeared in the last unfinished novel by Pier Paolo Pasolini, Petrolio. It does not consider only the well-known case of the author's series of photographs commissioned of the young artist Dino Pedriali by the author himself in 1975, but other hypothetical pieces of an "iconotext" never completed: from family pictures, to 'artistic' photos such as those of Wilhelm von Gloeden (1856-1931), and above all, images of the dark Italian news of the sixties and seventies.
Investigating ChaMPlane X-ray sources in the Galactic Bulge with Magellan LDSS2 spectra
Creators: name: Koenig, Xavier
name: Grindlay, Jonathan E.
name: Berg, Maureen van den
name: Laycock, Silas
name: Zhao, Ping
name: Hong, JaeSub
name: Schlegel, Eric M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have carried out optical and X-ray spectral analyses on a sample of 136 candidate optical counterparts of X-ray sources found in five Galactic-bulge fields included in our Chandra Multi-wavelength Plane Survey. We use a combination of optical spectral fitting and quantile X-ray analysis to obtain the hydrogen column density towards each object, and a three-dimensional dust model of the Galaxy to estimate the most probable distance in each case. We present the discovery of a population of stellar coronal emission sources, likely consisting of pre-main sequence, young main sequence and main sequence stars, as well as a component of active binaries of RS CVn or BY Dra type. We identify one candidate quiescent low-mass X-ray binary with a sub-giant companion; we note that this object may also be an RS CVn system. We report the discovery of three new X-ray detected cataclysmic variables (CVs) in the direction of the Galactic Center (at distances ~2kpc). This number is in excess of predictions made with a simple CV model based on a local CV space density of
description: 41 pages, 11 figures. Accepted for publication in Astrophysical Journal, September 10 edition
Cephennium kiesenwetteri AUBE 1853
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Cephennium
Cephennium kiesenwetteri

description: Cephennium kiesenwetteri AUBÉ, 1853 (Figs 25-26)
Material examined: FRANCE: Pyrénées - Orientales: 4♂♂, 8♀♀, Vernet-les-bains, 3.VII.1976, leg. Meybohm (cAss); 1♂, 6♀♀, Sahorre, 4.VII.1976, leg. Meybohm (cAss); 3♂♂, Prades env., Cuxa, VII.1978, leg. Frank (cAss); 1♀, Col du Cavaire de Font Romeu, 1840 m, 20.VI.1999, leg. Wolf (cAss). Ariége: 1♂, Rebenty env., 1.VII.1976, leg. Meybohm (cAss). Haute - Garonne: 1♂, 1♀, Marignac, Forêtde Burat, 800-1000 m, 20.VI.2004, leg. Wolf (cAss); 7♂♂, 5♀♀, Cabane de Salode env., Pic de Burat, 1300-1500 m, 18.VI.2004, leg. Wolf (cAss); 1♂, Bagnères-de-Luchon, Sode/Artigue, ca. 800 m, 17.VI.2004, leg. Wolf (cAss); 3♂♂, 1♀, Bagnères-de-Luchon, Forêt Dominale, 1500 m, 22.VI.2004, leg. Wolf (cAss). SPAIN: Cataluña: 1♂, N Barcelona, Sierra de Montseny, 1400 m, 19.III.1994, leg. Wunderle (cAss).
Material examined by C. Besuchet (unpubl.; material deposited in MHNG and numerous other collections): FRANCE: Hautes - Pyrénées: 15 exs., Aragnouet, 1 ex., Cramezaygues; 1 ex., Payolle;. Ariège: 1 ex., La Bastide S la de Feroliac; 1 ex., Salau; 1 ex., " Gr. de Peyort "; 10 exs., Ax-les-Thermes; 10 exs., Le Lata near Ax-les-Thermes; 3 exs., St. Lary; 1 ex., Souex Kercabanac; 1 ex., Biert; 1 ex., Forêt de Belesta; 1 ex., Aulus; 1 ex., Grotte de Capètes; 2 exs., Hospitalet; 1 ex., Massat; 12 exs., locality not specified; 3 exs., Ariège, locality illegible. Haute - Garonne. 2exs.,Portet-d'Aspet; 2exs., Bagnères-de-Luchon; 1 ex., St. Lary: Aude. 24 exs., Belcaire; 4 exs., Puivert; 6 exs., Forêt de Nave; 1 ex., Forêt de Boucheville; 6 exs., Nebios; 1 ex., Gr. de l'Homme mort; 1 ex., Escouloubre; 3 exs., Grotte Pic Laguzou; 11 exs., Coudons; 2 exs., locality not specified. Pyrénées - Orientales: 5 exs., La Preste; 1 ex., Moline; 1 ex., Font Romen [?]; 4 exs., Forêt Bolquez; 3 exs., Canigou, 1500 m; 45 exs., Canigou; 7exs., LeVernet; 1ex.,M.Nou.Locality not specified: 2 exs., Pyrénées, Gesse river; 5 exs., " Htes Pyr. ", etc.; 33 exs., " Pyr. Or. ", etc.; 27 exs., " Pyrénées ", " Pyrenaeen ", etc. ANDORRA: 1 ex., Pic de Casamanya; 1 ex., Grdino [?]; 3 exs., Curtinada. SPAIN: Cataluña: 1 ex., Gerona, Col de Casas; 1 ex., Sierra de Montseny; 5 exs., Lleida, Mato de Valencia; 11 exs., Lleida, Val d'Aran, Portillon [?]; 1 ex., Lleida, Val d'Aran, Betrens; 1 ex., Lleida, Val d'Aran, Bosc Bericauba; 1 ex., Lleida, Val d'Aran, Salardu; 10 exs., Lleida, Val d'Aran.
This species is rather common in the Pyrenees and adjacent regions. In Spain, it has been recorded only from Cataluña. The aedeagus is illustrated in Figs 25-26. For numerous records and illustrations of the male primary and secondary sexual characters see OROUSSET (2017).
description: Published as part of Assing, Volker, 2021, On the Cephennium fauna of the Iberian Peninsula and the Atlantic Islands (Coleoptera, Staphylinidae, Scydmaeninae), pp. 891-931 in Linzer biologische Beiträge 52 (2) on page 896, DOI: 10.5281/zenodo.5039032
Time-resolved spectroscopic studies of photovoltaic and photosynthetic materials
Creators: name: Kumar, Rhea
Publisher: name: Imperial College London
Year: 2022

description: Soft materials employing organic molecules are among the front-running candidates for next-generation solar cells. They offer lightweight, flexible characteristics which are cheap to produce and implement, making them more promising than commercially available inorganic photovoltaics. Furthermore, the possibility to tune the molecular structure of organic components presents an infinite pool of opportunity in the endeavour to enhance photovoltaic performance. This thesis evaluates a collection of soft materials from various perspectives that are currently at the forefront of photovoltaic research. The investigations described herein aim to elucidate the mechanisms contributing to photovoltaic performance by application of time-resolved spectroscopic tools. Chapter 3 examines the effects of chemical structure modification on small molecule components for organic photovoltaic devices. Two studies are presented, both of which describe a regioisomeric modification on a molecular structure that is incorporated into a photovoltaic blend. In both cases, transient absorption spectroscopy reveals stark contrasts in the materials’ exciton and charge dynamics which strongly influence their propensity for photovoltaic charge generation. The discussion highlights the dramatic consequences of minor structural differences in organic photovoltaic components, which emphasises the immense potential for their development. Chapter 4 considers the operational stability of photovoltaic devices comprising soft materials, which is a major hurdle currently hindering their industrialisation. Two studies are presented, in which charge dynamics unravelled by transient absorption spectroscopy are used to rationalise the studied materials’ lifetimes under operational conditions. Chapter 5 explores the natural biological apparatus for photovoltaic light-harvesting by examining photosynthetic microorganisms. A range of electrochemical and time-resolved spectroscopic methods are employed in order to investigate photoinduced processes in cyanobacteria in biophotovoltaic devices as well as in vivo. Overall, the research demonstrated in this thesis establishes fundamental findings for advancing soft photovoltaic materials. The insights regarding photophysical processes and optoelectronic properties of the studied systems highlight crucial lessons for material optimisation which could aid in their development, contributing to the goal of commercialisation.
Upscaling peatland mapping with drone-derived imagery: impact of spatial resolution and vegetation characteristics
Creators: name: Steenvoorden, Jasper
name: Limpens, Juul
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Information Systems not elsewhere classified
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: Northern peatland functions are strongly associated with vegetation structure and composition. While large-scale monitoring of functions through remotely sensed mapping of vegetation patterns is therefore promising, knowledge on the interdependency between spatial resolution of acquired imagery, spatial vegetation characteristics, and resulting mapping accuracy needs to be improved. We evaluated how classification accuracy of commonly used vegetation mapping units (microforms and plant functional types) was affected by spatial resolution of acquired imagery and several spatial characteristics of the vegetation itself (size, shape, configuration, and diversity). To this end, we collected very high-resolution drone imagery (<0.05 m) from eight Irish peatlands differing in vegetation composition and pattern complexity in September 2021 and 2022. We then resampled this imagery from pixel sizes of 0.027–1 m and classified both mapping units at all unique spatial resolutions. Hereafter, we computed spatial vegetation characteristics for each of the eight classified images at 0.027 m spatial resolution to determine their role in defining minimum spatial resolution requirements for both microforms and plant functional types. We found that overall classification accuracy of microforms and plant functional types was consistently high (>90%) for all studied peatlands until average spatial resolutions were reached of 0.5 m ± 0.2 m and 0.25 m ± 0.1 m, respectively. However, variability within mapping units was considerable, with overall minimum spatial resolution ranging between 0.25 and 0.7 m for microforms and between 0.15 and 0.35 m for plant functional types. Individual classes even varied from 0.05  to 1 m. Furthermore, spatial vegetation characteristics were important drivers of minimum spatial resolution for microforms, but not for plant functional types. Particularly, peatlands with larger, compacter, and more clustered microform patches could be classified with coarser spatial resolution imagery (up to 0.7 m), while peatlands with small, complex, diverse, and more finely distributed patches required higher spatial resolutions (minimally 0.25 m). Based on these findings, we conclude that spatial vegetation characteristics strongly determine minimum required spatial resolution and thus affect upscaling of peatland vegetation mapping beyond the landscape scale by constraining the use of specific remote sensing platforms.