cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analysis of Olive Grove Destruction by Xylella fastidiosa Bacterium on the Land Surface Temperature in Salento Detected Using Satellite Images
Creators: name: Semeraro, Teodoro
name: Buccolieri, Riccardo
name: Vergine, Marzia
name: De Bellis, Luigi
name: Luvisi, Andrea
name: Emmanuel, Rohinton
name: Marwan, Norbert
Publisher: name: Basel : MDPI
Year: 2021
Subjects: subject: Agricultural
subject: Ecosystem services
subject: Land surfaces temperature
subject: Landscape regeneration
subject: Microclimate regulation
subject: Panarchy
subject: Recurrence analysis
subject: Social-ecological system
subject: Xylella fastidiosa
subject: 630
subject: 640
subject: 690

description: Agricultural activity replaces natural vegetation with cultivated land and it is a major cause of local and global climate change. Highly specialized agricultural production leads to extensive monoculture farming with a low biodiversity that may cause low landscape resilience. This is the case on the Salento peninsula, in the Apulia Region of Italy, where the Xylella fastidiosa bacterium has caused the mass destruction of olive trees, many of them in monumental groves. The historical land cover that characterized the landscape is currently in a transition phase and can strongly affect climate conditions. This study aims to analyze how the destruction of olive groves by X. fastidiosa affects local climate change. Land surface temperature (LST) data detected by Landsat 8 and MODIS satellites are used as a proxies for microclimate mitigation ecosystem services linked to the evolution of the land cover. Moreover, recurrence quantification analysis was applied to the study of LST evolution. The results showed that olive groves are the least capable forest type for mitigating LST, but they are more capable than farmland, above all in the summer when the air temperature is the highest. The differences in the average LST from 2014 to 2020 between olive groves and farmland ranges from 2.8 °C to 0.8 °C. Furthermore, the recurrence analysis showed that X. fastidiosa was rapidly changing the LST of the olive groves into values to those of farmland, with a difference in LST reduced to less than a third from the time when the bacterium was identified in Apulia six years ago. The change generated by X. fastidiosa started in 2009 and showed more or less constant behavior after 2010 without substantial variation; therefore, this can serve as the index of a static situation, which can indicate non-recovery or non-transformation of the dying olive groves. Failure to restore the initial environmental conditions can be connected with the slow progress of the uprooting and replacing infected plants, probably due to attempts to save the historic aspect of the landscape by looking for solutions that avoid uprooting the diseased plants. This suggests that social-ecological systems have to be more responsive to phytosanitary epidemics and adapt to ecological processes, which cannot always be easily controlled, to produce more resilient landscapes and avoid unwanted transformations.
Exploring the impact of atmospheric forcing and basal drag on the Antarctic Ice Sheet under Last Glacial Maximum conditions
Creators: name: Blasco, Javier
name: Alvarez-Solas, Jorge
name: Robinson, Alexander
name: Montoya, Marisa
Publisher: name: Katlenburg-Lindau : Copernicus
Year: 2021
Subjects: subject: 910

description: Little is known about the distribution of ice in the Antarctic Ice Sheet (AIS) during the Last Glacial Maximum (LGM). Whereas marine and terrestrial geological data indicate that the grounded ice advanced to a position close to the continental-shelf break, the total ice volume is unclear. Glacial boundary conditions are potentially important sources of uncertainty, in particular basal friction and climatic boundary conditions. Basal friction exerts a strong control on the large-scale dynamics of the ice sheet and thus affects its size and is not well constrained. Glacial climatic boundary conditions determine the net accumulation and ice temperature and are also poorly known. Here we explore the effect of the uncertainty in both features on the total simulated ice storage of the AIS at the LGM. For this purpose we use a hybrid ice sheet shelf model that is forced with different basal drag choices and glacial background climatic conditions obtained from the LGM ensemble climate simulations of the third phase of the Paleoclimate Modelling Intercomparison Project (PMIP3). Overall, we find that the spread in the simulated ice volume for the tested basal drag parameterizations is about the same range as for the different general circulation model (GCM) forcings (4 to 6 m sea level equivalent). For a wide range of plausible basal friction configurations, the simulated ice dynamics vary widely but all simulations produce fully extended ice sheets towards the continental-shelf break. More dynamically active ice sheets correspond to lower ice volumes, while they remain consistent with the available constraints on ice extent. Thus, this work points to the possibility of an AIS with very active ice streams during the LGM. In addition, we find that the surface boundary temperature field plays a crucial role in determining the ice extent through its effect on viscosity. For ice sheets of a similar extent and comparable dynamics, we find that the precipitation field determines the total AIS volume. However, precipitation is highly uncertain. Climatic fields simulated by climate models show more precipitation in coastal regions than a spatially uniform anomaly, which can lead to larger ice volumes. Our results strongly support using these paleoclimatic fields to simulate and study the LGM and potentially other time periods like the last interglacial. However, their accuracy must be assessed as well, as differences between climate model forcing lead to a large spread in the simulated ice volume and extension.
The generalized Hodge and Bloch conjectures are equivalent for general complete intersections
Creators: name: Voisin, Claire
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Let $X$ be a smooth complex projective variety with trivial Chow groups. (By trivial, we mean that the cycle class is injective.) We show (assuming the Lefschetz standard conjecture) that if the vanishing cohomology of a general complete intersection $Y$ of ample hypersurfaces in $X$ has geometric coniveau $\geq c$, then the Chow groups of cycles of dimension $\leq c-1$ of $Y$ are trivial. The generalized Bloch conjecture for $Y$ is this statement with "geometric coniveau" replaced by "Hodge coniveau".
Modeling two-language competition dynamics
Creators: name: Patriarca, M.
name: Castelló, X.
name: Uriarte, J. R.
name: Eguíluz, V. M.
name: Miguel, M. San
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: During the last decade, much attention has been paid to language competition in the complex systems community, that is, how the fractions of speakers of several competing languages evolve in time. In this paper we review recent advances in this direction and focus on three aspects. First we consider the shift from two-state models to three state models that include the possibility of bilingual individuals. The understanding of the role played by bilingualism is essential in sociolinguistics. In particular, the question addressed is whether bilingualism facilitates the coexistence of languages. Second, we will analyze the effect of social interaction networks and physical barriers. Finally, we will show how to analyze the issue of bilingualism from a game theoretical perspective.
description: 15 pages, 5 figures; published in the Special Issue of Advances in Complex Systems "Language Dynamics"
Eemian landscape response to climatic shifts and evidence for northerly Neanderthal occupation at a palaeolake margin in northern Germany
Creators: name: Hein, Michael
name: Urban, Brigitte
name: Tanner, David Colin
name: Buness, Anton Hermann
name: Tucci, Mario
name: Hoelzmann, Philipp
name: Dietel, Sabine
name: Kaniecki, Marie
name: Schultz, Jonathan
name: Kasper, Thomas
name: Suchodoletz, Hans Von
name: Schwalb, Antje
name: Weiss, Marcel
name: Lauer, Tobias
Publisher: name: New York, NY [u.a.] : Wiley
Year: 2021
Subjects: subject: Eemian interglacial
subject: landscape evolution
subject: luminescence dating
subject: Neanderthal occupation
subject: paleolake
subject: pollen analysis
subject: 910

description: The prevailing view suggests that the Eemian interglacial on the European Plain was characterized by largely negligible geomorphic activity beyond the coastal areas. However, systematic geomorphological studies are sparse. Here we present a detailed reconstruction of Eemian to Early Weichselian landscape evolution in the vicinity of a small fingerlake on the northern margin of the Salzwedel Palaeolake in Lower Saxony (Germany). We apply a combination of seismics, sediment coring, pollen analysis and luminescence dating on a complex sequence of colluvial, paludal and lacustrine sediments. Results suggest two pronounced phases of geomorphic activity, directly before the onset and at the end of the Eemian period, with an intermediate period of pronounced landscape stability. The dynamic phases were largely driven by incomplete vegetation cover, but likely accentuated by fluvial incision in the neighbouring Elbe Valley. Furthermore, we discovered Neanderthal occupation at the lakeshore during Eemian pollen zone (PZ) E IV, which is chronologically in line with other known Eemian sites of central Europe. Our highly-resolved spatio-temporal data substantially contribute to the understanding of climate-induced geomorphic processes throughout and directly after the last interglacial period. It helps unraveling the landscape dynamics between the coastal areas to the north and the loess belt to the south.
Potential yield simulated by global gridded crop models: using a process-based emulator to explain their differences
Creators: name: Ringeval, Bruno
name: Müller, Christoph
name: Pugh, Thomas A. M.
name: Mueller, Nathaniel D.
name: Ciais, Philippe
name: Folberth, Christian
name: Liu, Wenfeng
name: Debaeke, Philippe
name: Pellerin, Sylvain
Publisher: name: Katlenburg-Lindau : Copernicus
Year: 2021
Subjects: subject: aboveground biomass
subject: agricultural modeling
subject: computer simulation
subject: growing season
subject: maize
subject: net primary production
subject: phenology
subject: yield response
subject: 910

description: How global gridded crop models (GGCMs) differ in their simulation of potential yield and reasons for those differences have never been assessed. The GGCM Intercomparison (GGCMI) offers a good framework for this assessment. Here, we built an emulator (called SMM for simple mechanistic model) of GGCMs based on generic and simplified formalism. The SMM equations describe crop phenology by a sum of growing degree days, canopy radiation absorption by the Beer–Lambert law, and its conversion into aboveground biomass by a radiation use efficiency (RUE). We fitted the parameters of this emulator against gridded aboveground maize biomass at the end of the growing season simulated by eight different GGCMs in a given year (2000). Our assumption is that the simple set of equations of SMM, after calibration, could reproduce the response of most GGCMs so that differences between GGCMs can be attributed to the parameters related to processes captured by the emulator. Despite huge differences between GGCMs, we show that if we fit both a parameter describing the thermal requirement for leaf emergence by adjusting its value to each grid-point in space, as done by GGCM modellers following the GGCMI protocol, and a GGCM-dependent globally uniform RUE, then the simple set of equations of the SMM emulator is sufficient to reproduce the spatial distribution of the original aboveground biomass simulated by most GGCMs. The grain filling is simulated in SMM by considering a fixed-in-time fraction of net primary productivity allocated to the grains (frac) once a threshold in leaves number (nthresh) is reached. Once calibrated, these two parameters allow for the capture of the relationship between potential yield and final aboveground biomass of each GGCM. It is particularly important as the divergence among GGCMs is larger for yield than for aboveground biomass. Thus, we showed that the divergence between GGCMs can be summarized by the differences in a few parameters. Our simple but mechanistic model could also be an interesting tool to test new developments in order to improve the simulation of potential yield at the global scale.
DNA methylation assessment as a prognostic factor in invasive breast cancer using methylation-specific multiplex ligation dependent probe amplification
Creators: name: Shakeri, Halaleh
name: Gharesouran, Jalal
name: Fakhrjou, Ashraf
name: Esfahani, Ali
name: Mohaddes Ardebili, Seyyed Mojtaba
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2016
Subjects: MS-MLPA
methylation
breast cancer
IDC
tumor suppressor genes

description: DNA methylation of promoter regions is a common molecular mechanism for inactivation of tumor suppressor genes that participates in carcinogenesis. Determining the methylation status of genes in cancer and their association with clinical features play an essential role in early diagnosis, prognosis and determine appropriate treatment for patients. The purpose of the present study was to evaluate the methylation of tumor suppressor genes in patients with invasive ductal carcinoma (IDC). Furthermore, we evaluated the association between clinical parameters and DNA methylation as a biomarker in diagnostic IDC patients. The methylation-specific multiplex ligation dependent probe amplification (MS-MLPA) assay was used to analyze the methylation profile of 24 genes in formalin-fixed paraffin embedded (FFPE) tissue samples from 75 patients with IDC. Each of the patients showed a distinctive methylation profile. We observed higher methylation in the RASSF1 (48 %), CDH13 (44 %) and GSTP1 (36 %) genes. Some of the methylated genes were associated with clinical features. Methylation of GSTP1 (P=0.028) and RASSF1 (P=0.012) were related with lymph node metastasis. Methylation of GSTP1 (P=0.005) was associated with high histological grade. Moreover, concurrent methylation of GSTP1 and CDH13 was observed in IDC patients (p
description: EXCLI Journal; 15:Doc11; ISSN 1611-2156
The curious conundrum regarding sulfur and oxygen abundances in planetary nebulae
Creators: name: Henry, R. B. C.
name: Speck, A.
name: Karakas, A. I.
name: Ferland, G. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We carefully consider numerous explanations for the sulfur abundance anomaly in planetary nebulae. No one rationale appears to be satisfactory, and we suggest that the ultimate explanation is likely to be a heretofore unidentified feature of the nebular gas which significantly impacts the sulfur ionization correction factor.
description: 2 pages, 1 figure, proceedings of the IAU Symposium No. 283, Planetary Nebulae: An Eye to the Future
A unique standard holder with an inscription from Trier
Creators: name: Nouwen, Robert
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: [nicht vorhanden]
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 63 (2000): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
Edible insect processing pathways and implementation of emerging technologies
Creators: name: Ojha, S.
name: Bußler, S.
name: Psarianos, M.
name: Rossi, G.
name: Schlüter, O.K.
Publisher: name: Wageningen : Wageningen Academic Publishers
Year: 2021
Subjects: subject: extraction
subject: microbial decontamination
subject: nonthermal technologies
subject: novel food
subject: pre-processing
subject: 630

description: The processing of insects is paramount to deliver safe and high quality raw materials, ingredients and products for large-scale food and feed applications. Depending upon the nature of the initial material and the desired end product, the processing pathways vary and may include several unit operations currently already used in food and feed processing. Insect processing pathways can involve harvesting, pre-processing, decontamination, further processing, packaging and storage. Several traditional and industrial decontamination methods have been proposed for edible insects, which include smoking, drying, blanching/boiling, marination, cooking, steaming, toasting and their combinations. Further processing steps are employed to produce insect meal, insect flour or extracted insect fractions. Each operation will have a different impact on the chemical and microbiological properties of the final product. Novel food processing technologies (e.g. high pressure processing, pulsed electric field, ultrasound and cold plasma) have shown potential to modify, complement or replace the conventional processing steps in insect processing. These technologies have been tested for microbial decontamination, enzyme inactivation, drying and extraction. Further, these are considered to be environmentally friendly and may be implemented for versatile applications to improve the processing efficiency, safety and quality of insect based products. Future research focuses in insect processing are development of efficient, environmentally friendly and low-cost processes; waste minimisation and incorporation of by-products/co-products.
Die unterirdische Wasserleitung der Raschpëtzer : Ein Monument antiker Ingenieurbaukunst aus Luxemburg
Creators: name: Kayser, Pit
name: Waringo, Guy
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: [nicht vorhanden]
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 63 (2000): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
A semantically enriched web usage based recommendation model
Creators: name: Ramesh, C.
name: Rao, K. V. Chalapati
name: Govardhan, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: With the rapid growth of internet technologies, Web has become a huge repository of information and keeps growing exponentially under no editorial control. However the human capability to read, access and understand Web content remains constant. This motivated researchers to provide Web personalized online services such as Web recommendations to alleviate the information overload problem and provide tailored Web experiences to the Web users. Recent studies show that Web usage mining has emerged as a popular approach in providing Web personalization. However conventional Web usage based recommender systems are limited in their ability to use the domain knowledge of the Web application. The focus is only on Web usage data. As a consequence the quality of the discovered patterns is low. In this paper, we propose a novel framework integrating semantic information in the Web usage mining process. Sequential Pattern Mining technique is applied over the semantic space to discover the frequent sequential patterns. The frequent navigational patterns are extracted in the form of Ontology instances instead of Web page views and the resultant semantic patterns are used for generating Web page recommendations to the user. Experimental results shown are promising and proved that incorporating semantic information into Web usage mining process can provide us with more interesting patterns which consequently make the recommendation system more functional, smarter and comprehensive.
Combined rock slope stability and shallow landslide susceptibility assessment of the Jasmund cliff area (Rügen Island, Germany)
Creators: name: Günther, A.
name: Thiel, C.
Publisher: name: Katlenburg-Lindau : European Geophysical Society
Year: 2009
Subjects: subject: cliff
subject: glacial deposit
subject: hazard assessment
subject: hydraulic conductivity
subject: inventory
subject: kinematics
subject: landslide
subject: numerical model
subject: rockfall
subject: slope failure
subject: slope stability
subject: Germany
subject: Jasmund
subject: Mecklenburg-West Pomerania
subject: Rugen
subject: 910

description: In this contribution we evaluated both the structurally-controlled failure susceptibility of the fractured Cretaceous chalk rocks and the topographically-controlled shallow landslide susceptibility of the overlying glacial sediments for the Jasmund cliff area on Rügen Island, Germany. We employed a combined methodology involving spatially distributed kinematical rock slope failure testing with tectonic fabric data, and both physically- and inventory-based shallow landslide susceptibility analysis. The rock slope failure susceptibility model identifies areas of recent cliff collapses, confirming its value in predicting the locations of future failures. The model reveals that toppling is the most important failure type in the Cretaceous chalk rocks of the area. The shallow landslide susceptibility analysis involves a physically-based slope stability evaluation which utilizes material strength and hydraulic conductivity data, and a bivariate landslide susceptibility analysis exploiting landslide inventory data and thematic information on ground conditioning factors. Both models show reasonable success rates when evaluated with the available inventory data, and an attempt was made to combine the individual models to prepare a map displaying both terrain instability and landslide susceptibility. This combination highlights unstable cliff portions lacking discrete landslide areas as well as cliff sections highly affected by past landslide events. Through a spatial integration of the rock slope failure susceptibility model with the combined shallow landslide assessment we produced a comprehensive landslide susceptibility map for the Jasmund cliff area.
Ein spätmittelalterlicher Münzschatzfund aus der Kuhnenstraße in Trier : Reflex der Manderscheider Fehde?
Creators: name: Clemens, Lukas
name: Schneider, Konrad
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: [nicht vorhanden]
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 63 (2000): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
Structural analysis of S-wave seismics around an urban sinkhole: evidence of enhanced dissolution in a strike-slip fault zone
Creators: name: Wadas, Sonja H.
name: Tanner, David C.
name: Polom, Ulrich
name: Krawczyk, Charlotte M.
Publisher: name: Katlenburg-Lindau : European Geophysical Society
Year: 2017
Subjects: subject: fault zone
subject: S-wave
subject: seismic hazard
subject: seismic reflection
subject: sinkhole
subject: strike-slip fault
subject: structural analysis
subject: urban area
subject: Germany
subject: 910

description: In November 2010, a large sinkhole opened up in the urban area of Schmalkalden, Germany. To determine the key factors which benefited the development of this collapse structure and therefore the dissolution, we carried out several shear-wave reflection-seismic profiles around the sinkhole. In the seismic sections we see evidence of the Mesozoic tectonic movement in the form of a NW–SE striking, dextral strike-slip fault, known as the Heßleser Fault, which faulted and fractured the subsurface below the town. The strike-slip faulting created a zone of small blocks ( < 100 m in size), around which steep-dipping normal faults, reverse faults and a dense fracture network serve as fluid pathways for the artesian-confined groundwater. The faults also acted as barriers for horizontal groundwater flow perpendicular to the fault planes. Instead groundwater flows along the faults which serve as conduits and forms cavities in the Permian deposits below ca. 60 m depth. Mass movements and the resulting cavities lead to the formation of sinkholes and dissolution-induced depressions. Since the processes are still ongoing, the occurrence of a new sinkhole cannot be ruled out. This case study demonstrates how S-wave seismics can characterize a sinkhole and, together with geological information, can be used to study the processes that result in sinkhole formation, such as a near-surface fault zone located in soluble rocks. The more complex the fault geometry and interaction between faults, the more prone an area is to sinkhole occurrence.
Felix Hettner (1851-1902), das Provinzialmuseum zu Trier und die Archäologie Westdeutschlands
Creators: name: Merten, Jürgen
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: [nicht vorhanden]
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 65 (2002): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
Electronic Properties and Structure of Boron–Hydrogen Complexes in Crystalline Silicon
Creators: name: De Guzman, Joyce Ann T.
name: Markevich, Vladimir P.
name: Coutinho, José
name: Abrosimov, Nikolay V.
name: Halsall, Matthew P.
name: Peaker, Anthony R.
Publisher: name: Weinheim : Wiley-VCH
Year: 2021
Subjects: subject: ab initio modeling
subject: boron–hydrogen
subject: DLTS
subject: LeTID
subject: passivation
subject: silicon
subject: solar cells
subject: 600

description: The subject of hydrogen–boron interactions in crystalline silicon is revisited with reference to light and elevated temperature-induced degradation (LeTID) in boron-doped solar silicon. Ab initio modeling of structure, binding energy, and electronic properties of complexes incorporating a substitutional boron and one or two hydrogen atoms is performed. From the calculations, it is confirmed that a BH pair is electrically inert. It is found that boron can bind two H atoms. The resulting BH2 complex is a donor with a transition level estimated at E c–0.24 eV. Experimentally, the electrically active defects in n-type Czochralski-grown Si crystals co-doped with phosphorus and boron, into which hydrogen is introduced by different methods, are investigated using junction capacitance techniques. In the deep-level transient spectroscopy (DLTS) spectra of hydrogenated Si:P + B crystals subjected to heat-treatments at 100 °C under reverse bias, an electron emission signal with an activation energy of ≈0.175 eV is detected. The trap is a donor with electronic properties close to those predicted for boron–dihydrogen. The donor character of BH2 suggests that it can be a very efficient recombination center of minority carriers in B-doped p-type Si crystals. A sequence of boron–hydrogen reactions, which can be related to the LeTID effect in Si:B is proposed.
Inhalt des 65. Jahrgangs
Creators: name: Redaktion, Die
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 65 (2002): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
A polyyne toxin produced by an antagonistic bacterium blinds and lyses a Chlamydomonad alga
Creators: name: Hotter, Vivien
name: Zopf, David
name: Kim, Hak Joong
name: Silge, Anja
name: Schmitt, Michael
name: Aiyar, Prasad
name: Fleck, Johanna
name: Matthäus, Christian
name: Hniopek, Julian
name: Yan, Qing
name: Loper, Joyce
name: Sasso, Severin
name: Hertweck, Christian
name: Popp, Jürgen
name: Mittag, Maria
Publisher: name: Washington, DC : National Acad. of Sciences
Year: 2021
Subjects: subject: Chlamydomonas reinhardtii
subject: Eyespot
subject: Microbial interactions
subject: Pseudomonas genome mining
subject: Raman microspectroscopy
subject: 000
subject: 500

description: Algae are key contributors to global carbon fixation and form the basis of many food webs. In nature, their growth is often supported or suppressed by microorganisms. The bacterium Pseudomonas protegens Pf-5 arrests the growth of the green unicellular alga Chlamydomonas reinhardtii, deflagellates the alga by the cyclic lipopeptide orfamide A, and alters its morphology [P. Aiyar et al., Nat. Commun. 8, 1756 (2017)]. Using a combination of Raman microspectroscopy, genome mining, and mutational analysis, we discovered a polyyne toxin, protegencin, which is secreted by P. protegens, penetrates the algal cells, and causes destruction of the carotenoids of their primitive visual system, the eyespot. Together with secreted orfamide A, protegencin thus prevents the phototactic behavior of C. reinhardtii. A mutant of P. protegens deficient in protegencin production does not affect growth or eyespot carotenoids of C. reinhardtii. Protegencin acts in a direct and destructive way by lysing and killing the algal cells. The toxic effect of protegencin is also observed in an eyeless mutant and with the colony-forming Chlorophyte alga Gonium pectorale. These data reveal a two-pronged molecular strategy involving a cyclic lipopeptide and a conjugated tetrayne used by bacteria to attack select Chlamydomonad algae. In conjunction with the bloom-forming activity of several chlorophytes and the presence of the protegencin gene cluster in over 50 different Pseudomonas genomes [A. J. Mullins et al., bioRxiv [Preprint] (2021). https://www.biorxiv.org/content/10.1101/2021.03.05.433886v1 (Accessed 17 April 2021)], these data are highly relevant to ecological interactions between Chlorophyte algae and Pseudomonadales bacteria.
Harvesting room-temperature plasticity in ceramics by mechanically seeded dislocations
Creators: name: Fang, Xufei
name: Lu, Wenjun
name: Zhang, Jiawen
name: Minnert, Christian
name: Hou, Junhua
name: Bruns, Sebastian
name: Kunz, Ulrike
name: Nakamura, Atsutomo
name: Durst, Karsten
name: Rödel, Jürgen
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The quest for room-temperature ductile ceramics has been repeatedly fueled by hopes for large-scale applications but so far has been not successful. Recent demonstrations of enhanced functional properties in ceramics through judicious dislocation imprint, however, have been sparking renewed interest in dislocation plasticity in brittle ceramics. Here, we propose a facile approach using room-temperature mechanically seeded mobile dislocations with a density of ~10^14/m^2 to significantly improve the room-temperature plasticity of ceramics with a large plastic strain beyond ~30%. The seeded mobile dislocations trigger profuse dislocation multiplication via cross slip and motion. Hence, they offer an avenue to suppress brittle fracture and harvest plasticity in ceramics without any additional high-temperature process. We employ both in situ nano-/micromechanical deformation and ex situ bulk deformation to bridge the length scales. This finding tackles the pressing bottleneck of dislocation engineering in ceramics for achieving ductile ceramics and harvesting both versatile mechanical and functional properties.
Regine Dölling, Die katholische Pfarrkirche St. Paulin in Trier
Creators: name: Seewaldt, Peter
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: Rezension zu: Regine Dölling, Die katholische Pfarrkirche St. Paulin in Trier. Mit Beiträgen von Reinhold Elenz, Doris Fischer, Elisabeth Jägers, Friedrich Wilhelm Riedel, Hans-Wolfgang Theobald. Forschungsberichte zur Denkmalpflege 8 (Wernersche Verlagsgesellschaft, Worms 2005). 196 S., zahlr., überw. farbige Abb. u. Pläne. ISBN 3-88462-221-8. Gebunden
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 69/70 (2006/2007): Trierer Zeitschrift : Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
On the flow map for 2D Euler equations with unbounded vorticity
Creators: name: Kelliher, James P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Analysis of PDEs (math.AP)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 35Q31, 76B03, 39B12

description: In Part I, we construct a class of examples of initial velocities for which the unique solution to the Euler equations in the plane has an associated flow map that lies in no Holder space of positive exponent for any positive time. In Part II, we explore inverse problems that arise in attempting to construct an example of an initial velocity producing an arbitrarily poor modulus of continuity of the flow map.
description: http://iopscience.iop.org/0951-7715/24/9/013/ for published version
Blind Carrier Phase Recovery for General 2π/M-rotationally Symmetric Constellations
Creators: name: Slimane, Emna Ben
name: Jarboui, Slaheddine
name: Bouallègue, Ammar
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper introduces a novel blind carrier phase recovery estimator for general 2Π/M-rotationally symmetric constellations. This estimation method is a generalization of the non-data-aided (NDA) nonlinear Phase Metric Method (PMM) estimator already designed for general quadrature amplitude constellations. This unbiased estimator is seen here as a fourth order PMM then generalized to Mth order (Mth PMM) in such manner that it covers general 2Π/M-rotationally symmetric constellations such as PAM, QAM, PSK. Simulation results demonstrate the good performance of this Mth PMM estimation algorithm against competitive blind phase estimators already published for various modulation systems of practical interest.
description: 14 pages, 12 figures, International Journal of Wireless & Mobile Networks (IJWMN)
Epistemic view of quantum states and communication complexity of quantum channels
Creators: name: Montina, Alberto
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The communication complexity of a quantum channel is the minimal amount of classical communication required for classically simulating a process of state preparation, transmission through the channel and subsequent measurement. It establishes a limit on the power of quantum communication in terms of classical resources. We show that classical simulations employing a finite amount of communication can be derived from a special class of hidden variable theories where quantum states represent statistical knowledge about the classical state and not an element of reality. This special class has attracted strong interest very recently. The communication cost of each derived simulation is given by the mutual information between the quantum state and the classical state of the parent hidden variable theory. Finally, we find that the communication complexity for single qubits is smaller than 1.28 bits. The previous known upper bound was 1.85 bits.
Coagulation-fragmentation for a finite number of particles and application to telomere clustering in the yeast nucleus
Creators: name: Hoze, Nathanael
name: Holcman, David
Publisher: name: arXiv
Year: 2012
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Mathematical Physics (math-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We develop a coagulation-fragmentation model to study a system composed of a small number of stochastic objects moving in a confined domain, that can aggregate upon binding to form local clusters of arbitrary sizes. A cluster can also dissociate into two subclusters with a uniform probability. To study the statistics of clusters, we combine a Markov chain analysis with a partition number approach. Interestingly, we obtain explicit formulas for the size and the number of clusters in terms of hypergeometric functions. Finally, we apply our analysis to study the statistical physics of telomeres (ends of chromosomes) clustering in the yeast nucleus and show that the diffusion-coagulation-fragmentation process can predict the organization of telomeres.
description: 11 pages, 5 figures
Jüngerlatènezeitliche Siedlungen bei Eschweiler, Kr. Aachen
Creators: name: Joachim, Hans-Eckart
name: Knörzer, Karl-Heinz
name: Schalich, Jörg
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Bonner Jahrbücher, Bd. 180.1980: Bonner Jahrbücher
Persistence and eventual demise of oxygen molecules at terapascal pressures
Creators: name: Sun, Jian
name: Martinez-Canales, Miguel
name: Klug, Dennis D.
name: Pickard, Chris J.
name: Needs, Richard J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Computational searches for structures of solid oxygen under pressures in the multi TPa range have been carried out using density-functional-theory methods. We find that molecular oxygen persists to about 1.9 TPa at which it transforms into a semiconducting square spiral-like polymeric structure (I41/acd) with a band gap of about 3.0 eV. Solid oxygen forms a metallic zig-zag chain-like structure (Cmcm) at about 3.0 TPa, but the chains in each layer gradually merge as the pressure is increased and a structure of Fmmm symmetry forms at about 9.5 TPa in which each atom has four nearest neighbors. The superconducting properties of molecular oxygen do not vary much with compression, although the structure becomes more symmetric. The electronic properties of oxygen have a complex evolution with pressure, swapping between insulating, semiconducting and metallic.
description: 5 pages, 4 figures. (jian.sun@theochem.rub.de)
Metallicities, dust and molecular content of a QSO-Damped Lyman-α system reaching log N (H i) = 22: An analog to GRB-DLAs
Creators: name: Guimarães, R.
name: Noterdaeme, P.
name: Petitjean, P.
name: Ledoux, C.
name: Srianand, R.
name: Lopez, S.
name: Rahmani, H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the elemental abundance and H2 content measurements of a Damped Lyman-α (DLA) system with an extremely large H i column density, log N(H i) (cm-2) = 22.0+/-0.10, at zabs = 3.287 towards the QSO SDSS J 081634+144612. We measure column densities of H2, C i, C i^*, Zn ii, Fe ii, Cr ii, Ni ii and Si ii from a high signal-to-noise and high spectral resolution VLT-UVES spectrum. The overall metallicity of the system is [Zn/H] = -1.10 +/- 0.10 relative to solar. Two molecular hydrogen absorption components are seen at z = 3.28667 and 3.28742 (a velocity separation of \approx 52 km s-1) in rotational levels up to J = 3. We derive a total H2 column density of log N(H2) (cm-2) = 18.66 and a mean molecular fraction of f = 2N(H2)/[2N(H2) + N(H i)] = 10-3.04+/-0.37, typical of known H2-bearing DLA systems. From the observed abundance ratios we conclude that dust is present in the Interstellar Medium (ISM) of this galaxy, with a enhanced abundance in the H2-bearing clouds. However, the total amount of dust along the line of sight is not large and does not produce any significant reddening of the background QSO. The physical conditions in the H2-bearing clouds are constrained directly from the column densities of H2 in different rotational levels, C i and C i^* . The kinetic temperature is found to be T = 75 K and the particle density lies in the range nH = 50-80 cm-3 . The neutral hydrogen column density of this DLA is similar to the mean H i column density of DLAs observed at the redshift of γ-ray bursts (GRBs). We explore the relationship between GRB-DLAs and high column density end of QSO-DLAs finding that the properties (metallicity and depletion) of DLAs with log N(H i) > 21.5 in the two populations do not appear to be significantly different.
Michel Ponsich, Implantation rurale antique sur le Bas-Guadalquivir. La Campaña-Palma del Rio-Posadas.
Creators: name: Hübener, Wolfgang
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Michel Ponsich, Implantation rurale antique sur le Bas-Guadalquivir. La Campaña-Palma del Rio-Posadas. Publications de la Casa de Velazquez, ser. Archéologie 3. Publié avec le concours de l’Instituto Español de Arqueologia (C. S. I. C.) et du conseil Oleicol International, Paris 1979. 245 Seiten.
description: Bonner Jahrbücher, Bd. 180.1980: Bonner Jahrbücher
Cristaux et immeubles
Creators: name: Cornut, Christophe
name: Nicole, Marc-Hubert
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: Let G be a connected reductive group defined over Q_p. The set of crystals contained in a given G-isocrystal is viewed from a Bruhat-Tits building-theoretic vantage point as a kind of tubular neighborhood of a skeleton characterized by a minimality property arising from metric space theory.
description: In French
Observations of Large Scale Sidereal Anisotropy in 1 and 11 TeV cosmic rays from the MINOS experiment
Creators: name: de Jong, J. K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The MINOS Near and Far Detectors are two large, functionally-identical, steel-scintillating sampling calorimeters located at depths of 220 mwe and 2100 mwe respectively. The detectors observe the muon component of hadronic showers produced from cosmic ray interactions with nuclei in the earth's atmosphere. From the arrival direction of these muons, the anisotropy in arrival direction of the cosmic ray primaries can be determined. The MINOS Near and Far Detector have observed anisotropy on the order of 0.1% at 1 and 11 TeV respectively. The amplitude and phase of the first harmonic at 1 TeV are 8.2$\pm$1.7(stat.)$\times 10^{-4}$ and (8.9$\pm$12.1(stat.))$^{\circ}$, and at 11 TeV are 3.8$\pm$0.5(stat.)$\times 10^{-4}$ and (27.2$\pm$7.2(stat.))$^{\circ}$.
description: 32nd International Cosmic Ray Conference, August 2011
Reanimating Images using Neural Representations of Dynamic Stimuli
Creators: name: Yeung, Jacob
name: Luo, Andrew F.
name: Sarch, Gabriel
name: Henderson, Margaret M.
name: Ramanan, Deva
name: Tarr, Michael J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: While computer vision models have made incredible strides in static image recognition, they still do not match human performance in tasks that require the understanding of complex, dynamic motion. This is notably true for real-world scenarios where embodied agents face complex and motion-rich environments. Our approach, BrainNRDS (Brain-Neural Representations of Dynamic Stimuli), leverages state-of-the-art video diffusion models to decouple static image representation from motion generation, enabling us to utilize fMRI brain activity for a deeper understanding of human responses to dynamic visual stimuli. Conversely, we also demonstrate that information about the brain's representation of motion can enhance the prediction of optical flow in artificial systems. Our novel approach leads to four main findings: (1) Visual motion, represented as fine-grained, object-level resolution optical flow, can be decoded from brain activity generated by participants viewing video stimuli; (2) Video encoders outperform image-based models in predicting video-driven brain activity; (3) Brain-decoded motion signals enable realistic video reanimation based only on the initial frame of the video; and (4) We extend prior work to achieve full video decoding from video-driven brain activity. BrainNRDS advances our understanding of how the brain represents spatial and temporal information in dynamic visual scenes. Our findings demonstrate the potential of combining brain imaging with video diffusion models for developing more robust and biologically-inspired computer vision systems. We show additional decoding and encoding examples on this site: https://brain-nrds.github.io/.
description: Project Page: https://brain-nrds.github.io
Helmut Bender, Archäologische Untersuchungen zur Ausgrabung Augst-Kurzenbettli. Ein Beitrag zur Erforschung der römischen Rasthäuser
Creators: name: Pekáry, Thomas
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Helmut Bender, Archäologische Untersuchungen zur Ausgrabung Augst-Kurzenbettli. Ein Beitrag zur Erforschung der römischen Rasthäuser. Antiqua 4. Veröffentlichungen der Schweizerischen Gesellschaft für Ur- und Frühgeschichte. Verlag Huber, Frauenfeld 1975. 174 Seiten, 58 Textabbildungen, 24 Tafeln, 17 Kartenbeilagen.
description: Bonner Jahrbücher, Bd. 180.1980: Bonner Jahrbücher
Werner Jobst, Römische Mosaiken aus Ephesos 1. Die Hanghäuser des Embolos (mit einem Beitrag von H. Vetters)
Creators: name: Hellenkemper Salies, Gisela
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Werner Jobst, Römische Mosaiken aus Ephesos 1. Die Hanghäuser des Embolos (mit einem Beitrag von H. Vetters). Forschungen in Ephesos VIII 2. Corpus der antiken Mosaiken Kleinasiens 1. Verlag der österreichischen Akademie der Wissenschaften, Wien 1977. 118 Seiten, 2 Abbildungen im Text, 219 Abbildungen auf Tafeln, davon 38 farbig.
description: Bonner Jahrbücher, Bd. 180.1980: Bonner Jahrbücher
Verified Representations of Landau's "Grundlagen" in the lambda-delta Family and in the Calculus of Constructions
Creators: name: Guidi, Ferruccio
Publisher: name: Alma Mater Studiorum - University of Bologna
Year: 2016
Subjects: Grundlagen der Analysis; Automath; pure type system; unified binders

description: Landau's "Grundlagen der Analysis" formalized in the language Aut-QE, represents an early milestone in computer-checked mathematics and is the only non-trivial development finalized in the languages of the Automath family. Here we discuss an implemented procedure producing a faithful representation of the Grundlagen in the Calculus of Constructions, verified by the proof assistant Coq 8.4.3. The point at issue is distinguishing lambda-abstractions from pi-abstractions where the original text uses Automath unified binders, taking care of the cases in which a binder corresponds to both abstractions at one time. It is a fact that some binders can be disambiguated only by verifying the Grundlagen in a calculus accepting Aut-QE and the Calculus of Constructions. To this end, we rely on lambda-delta version 3, a system that the author is proposing here for the first time.
description: Journal of Formalized Reasoning, Vol 8, No 1 (2015)
Die Perfektionierung der Wohnturmarchitektur im nachmittelalterlichen Burgenbau Schottlands
Creators: name: Zeune, Joachim
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 30 Nr. 1 (1989): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Oswald Graf Trapp ✝
Creators: name: Avenarius, Wilhelm
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 30 Nr. 1 (1989): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege