cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interplay between positive feedbacks in the generalized CEV process
Creators: name: Reimann, St.
name: Gontis, V.
name: Alaburda, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: 60G10

description: The dynamics of the {\em generalized} CEV process $dX_t = aX_t^n dt+ bX_t^m dW_t$ $(gCEV)$ is due to an interplay of two feedback mechanisms: State-to-Drift and State-to-Diffusion, whose degrees are $n$ and $m$ respectively. We particularly show that the gCEV, in which both feedback mechanisms are {\sc positive}, i.e. $n,m>1$, admits a stationary probability distribution $P$ provided that $n<2m-1$, which asymptotically decays as a power law $P(x) \sim \frac{1}{x^μ}$ with tail exponent $μ= 2m > 2$. Furthermore the power spectral density obeys $S(f) \sim \frac{1}{f^β}$, where $β= 2 - \:\frac{1+ε}{2(m-1)}$, $ε>0$. Bursting behavior of the gCEV is investigated numerically. Burst intensity $S$ and burst duration $T$ are shown to be related by $S\sim T^2$.
description: 8 pages, 9 figures
An Unusual Bonding Situation in a Novel AuI-Phosphido Complex with a Planar Au3P3 Framework
Creators: name: Vogel, Ulf
name: Sekar, Perumal
name: Ahlrichs, Reinhart
name: Huniar, Uwe
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: Metathesis; Cyclopentadienyl ligands; Chromium; P ligands; Gold
subject: 540 Chemie

description: Reaction of the mono-deprotonated derivative of [{Cp(CO)2Mo}2(-PH2)(-H)] (1) leads to the novel complex [{Cp(CO)2Mo}2(-H){3-P(H)Au(PPh3)}] (2). In contrast the reaction of the analogous Cr derivative [{Cp(CO)2Cr}2(-PH2)(-H)] (1a) leads under identical conditions to a planar Au3P3 cluster [{CpCr(CO)2}6(P3Au3)] (3). Both complexes were completely structurally and spectroscopically characterised. Density functional calculations have shown that 3 is characterised by P-Cr-Au multicentre and Cr-P multiple bonding.
Simulation of Quantum Magnetism in Mixed Spin Systems with Impurity Doped Ion Crystal
Creators: name: Ivanov, Peter A.
name: Schmidt-Kaler, Ferdinand
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose the realization of linear crystals of cold ions which contain different atomic species for investigating quantum phase transitions and frustration effects in spin system beyond the commonly discussed case of $s=1/2$. Mutual spin-spin interactions between ions can be tailored via the Zeeman effect by applying oscillating magnetic fields with strong gradients. Further, collective vibrational modes in the mixed ion crystal can be used to enhance and to vary the strength of spin-spin interactions and even to switch those forces from a ferro- to an antiferromagnetic character. We consider the behavior of the effective spin-spin couplings in an ion crystal of spin-1/2 ions doped with high magnetic moment ions with spin S=3. We analyze the ground state phase diagram and find regions with different spin orders including ferrimagnetic states. In the most simple non-trivial example we deal with a linear $\{$Ca$^+$, Mn$^+$, Ca$^+\}$ crystal with spins of $\{1/2,3,1/2}$. To show the feasibility with current state-of-the-art experiments, we discuss how quantum phases might be detected using a collective Stern-Gerlach effect of the ion crystal and high resolution spectroscopy. Here, the state-dependent laser-induced fluorescence of the indicator spin-1/2 ion, of species $^{40}$Ca$^+$, reveals also the spin state of the simulator spin-3 ions, $^{50}$Mn$^+$ as this does not possess suitable levels for optical excitation and detection.
description: 15 pages, 5 figures
P2-Ligand Complexes as Building Blocks for the Formation of One-Dimensional Polymers [P2-Ligandkomplexe als Bausteine zur Herstellung eindimensionaler Polymere]
Creators: name: Bai, Junfeng
name: Leiner, Eva
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: coordination polymers; copper; molybdenum; P ligands; silver
subject: 540 Chemie

description: Bridging coordination of Mo2P2 complexes between metal centers is a prerequisite for the formation of a one-dimensional polymer. The choice of counterion also has a deciding role in determining the polymer structure: while the complex [Cp2Mo2(CO)4(,2-P2)] (1; Cp=C5H5) with AgNO3 forms a zigzag polymer chain, with CuBr 1 forms a linear coordination polymer (see structure).
The targum (1879:Jan.)
Creators: name: No Name Supplied
Publisher: name: Targum Association
Year: 1879

description: Some University historians indicate that the Targum was first published as an annual in 1867, but of this we have no extant evidence. In January 1869, the Targum as we now know it, made its appearance as a monthly paper that concerned itself with student “literary contributions” and college news as well as serving as a vehicle for bringing news to alumni and the general public. The newspaper, which originally was for sale, varied in frequency over the years as did its title (The Targum, Rutgers Targum, Rutgers Daily Targum, and Daily Targum). The newspaper has continuously been published since 1869 with the exception of 19 months during the second world war, between February 1944 and October 1945. The Targum was published by the students of Rutgers College, and later Rutgers University—New Brunswick represented through the years as the Targum Association, Rutgers Targum Association, and Rutgers College Targum. As a student organization, the Targum operated under the oversight of the dean of students and student government but in October 1980, the Targum became an independent college paper.
Multiformin-Type Azaphilones Prevent SARS-CoV-2 Binding to ACE2 Receptor
Creators: name: Jansen-Olliges, Linda
name: Chatterjee, Shambhabi
name: Jia, Lili
name: Stahl, Frank
name: Bär, Christian
name: Stadler, Marc
name: Surup, Frank
name: Zeilinger, Carsten
Publisher: name: Basel : MDPI
Year: 2023
Subjects: subject: ACE2
subject: protein microarray
subject: protein-protein interaction
subject: SARS-CoV-2
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: Protein microarray screenings identified fungal natural products from the azaphilone family as potent inhibitors of SARS-CoV-2 spike protein binding to host ACE2 receptors. Cohaerin F, as the most potent substance from the cohaerin group, led to more than 50% less binding of ACE2 and SARS-CoV-2 spike protein. A survey for structurally related azaphilones yielded the structure elucidation of six new multiformins E–J (10–15) and the revision of the stereochemistry of the multiformins. Cohaerin and multiformin azaphilones (1–5, 8, 12) were assessed for their activity in a cell-based infection assay. Calu-3 cells expressing human ACE2 receptor showed more than 75% and 50% less infection by SARS-CoV-2 pseudotyped lentivirus particles after treatment with cohaerin C (1) and cohaerin F (4), respectively. Multiformin C (8) and G (12) that nearly abolished the infection of cells. Our data show that multiformin-type azaphilones prevent the binding of SARS-CoV-2 to the cell entry receptor ACE2.
Agronomic management based on multi-split topdressing increases grain yield and nitrogen use efficiency in rainfed maize in Vertisols of India
Creators: name: Meena, Bharat Prakash
name: Jha, Pramod
name: Ramesh, Kulasekaran
name: Biswas, Ashis Kumar
name: Elanchezhian, Rajamanickam
name: Das, Hiranmoy
name: Sathyaseelan, Neenu
name: Shirale, Abhay Omprakash
name: Patra, Ashok Kumar
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Plant Biology

description: Conventional fertilizer nitrogen (N) recommendations for rainfed maize resulted in low N use efficiency (NUE) due to several reasons. This warrants application of fertilizer synchronous with plant requirements that could aid in improved productivity and NUE. In this backdrop, to optimize N rates for maize, a field experiment was conducted during 2014 to 2016 in Vertisols. Twelve treatments in combinations viz., N omission, skipping basal dose, multi-split topdressing at varying time either as broadcast or band placement, soil test crop response (STCR) based N with target yield 6.0 t ha−1 and biochar application were investigated in a randomized block design (RBD). Late application of N rates (120 kg ha−1) in 2 equal splits at knee high (V8) and tasseling (VT) stages with skipping of basal N, significantly increased grain yield, agronomy efficiency (AE), partial factor productivity (PFP), physiological efficiency (PE) and recovery efficiency (RE) to the tune of 16.3%, 45.1%, 15.3%, 14.0% and 37.9% than conventional recommendations, respectively. The higher yields and NUE with late application of N were ascribed due to positive significant linear relationship between yield and N availability. Factor analysis too revealed the one to one positive function of biomass with N uptake at V8 and VT. Principal component (PC) regression exhibited that PC1 acted as a major predictor for yield and dominated by leaf area index (LAI) and N uptake. Thus, we conclude that the multi-split N, to achieve higher yield and greater NUE, is strongly linked with late splits of N at V8 and VT.
First Examples of Electrophilic Addition to a Fe2Q Face of [Fe3(μ3-Q)(CO)9]2− (Q=Se, Te)—Synthesis and Characterisation of [MFe3(μ4-Q)(CO)9Cp*] and [IrFe2(μ3-Q)(CO)7Cp*] (M=Rh, Ir; Cp*=η5-C5(CH3)5)
Creators: name: Konchenko, Sergei N.
name: Pushkarevsky, Nikolai A.
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: Cluster; carbonyl complexes; iron; rhodium; iridium; selenium; tellurium
subject: 540 Chemie

description: The reaction of [Et4N]2[Fe3(mgr 3-Q)(CO)9] (Q=Se ([Et4N]2[1b]), Te ([Et4N]2[1c])) with [Cp*M(CH3CN)3][CF3SO3]2 (M=Rh, Ir) leads to the addition of a Cp*M2+ unit to a Fe2Q face of the initial cluster. In this way four new heteronuclear clusters [MFe3(mgr 4-Q)(CO)9Cp*] (M=Rh (2b, c); M=Ir (3b, c)) were obtained possessing a butterfly-shaped cluster core bridged by a mgr 4-Q unit. Furthermore, reaction with the Ir starting complex leads to the metal-substituted derivatives [IrFe2(mgr 3-Q)(CO)7Cp*] (4b, c) in lower yields, whose structures consist of a triangular metal core capped by a mgr 3-Q ligand. The products were comprehensively characterised by spectroscopic methods and the molecular structures of 2b, 3c, and 4c were established by single crystal X-ray diffraction measurements.
Plant growth and nutrient uptake of Selliera radicans Cav. under soilless conditions and fertilized for cultivation purposes
Creators: name: Schiappacasse, Flavia
name: Castro, Margarita
name: Cabeza, Ricardo
name: Bonomelli, Claudia
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Developmental Biology
subject: Plant Biology

description: Selliera radicans is a creeping halophyte herb native to Australia, New Zealand and Chile. It is being used on the lawn to replace traditional grass in gardens. It holds up well against foot traffic and does not need to be mown. It is grown in nurseries, but nutritional or fertilizing aspects are unknown. The aims of this study were to assess plant coverage, dry matter (DM) content and nutrient accumulation in containerized plants started from two-node rhizome fragments in a growing season, and to develop a preliminary fertilizing guideline. The plants received mist (without fertilizer) and were watered twice a week with nutrient solutions of 0 (control), 150, and 300 mg L−1 N based on a 18 N − 18 P2O5−18 K2O fertilizer. Increasing fertilization rate resulted in higher DM, plant coverage and nutrient accumulation. The species occurs naturally in coastal areas under saline conditions; Na from the water used for irrigation (17 mg L−1) was not detrimental, despite plant Na concentration being higher than 1 g 100 g−1 dry matter in all treatments. The general guideline proposes to fertilize with 1 g N, 0.5 g P and 0.95 g K per plant (plant started from a rhizome fragment and growing into a complex plant with several axis) during the growing season, under the experiment conditions.
Determinants of West Nile Virus (WNV) incidence in select regions of Canada : an examination of climate and ecological drivers in British Columbia and Saskatchewan
Creators: name: Roth, David Z.
Publisher: name: University of British Columbia
Year: 2017

description: Background: West Nile Virus (WNV) is a zoonotic arbovirus that has caused significant disease in Canada, yet remains rare in British Columbia (BC). WNV is spread between avian reservoirs by Culex mosquitoes, and incidental transmission to humans can occur. Understanding temporal and spatial changes in WNV risk is di cult because of the complexity of the transmission cycle. Nonetheless, public health agencies require decision support in order to guide resource allocation. Understanding the climate and ecological drivers of WNV disease can help with the development of such tools. Methods: Descriptive analyses were used to compare ecological and climate conditions in years with and without WNV transmission in BC from 2009 to 2015. Generalized linear mixed models were used to evaluate associations between WNV incidence in Saskatchewan (2003-2007) and: 1) total irrigated landscape, and 2) avian community structure. Results were combined with a literature review to develop a WNV decision-support tool for BC which was evaluated via a user survey. Results: WNV activity in BC between 2009-2015 was limited to select locations during hot summers when temperatures remained above key temperature thresholds during the amplification period. In Saskatchewan, human incidence was positively associated with irrigated landscapes in 2003 but not 2007. Non-passerine species richness and abundance was positively associated with incidence from 2003-2007, and the dilution hypothesis was not supported. Heat was consistently associated with incidence, but other predictors had varying effects between years and models. The resulting decision support tool contained seven surveillance inputs and three hazard levels. Survey results supported the choice of surveillance inputs and the recommended prevention measures. Discussion: Ecological complexity challenges quantitative risk prediction for WNV and necessitates the use of simpler tools for public health decision support. Public health agencies in low-incidence areas should invest public health resources in improving situational awareness and preparedness instead of risk prediction. The decision support tool created here provides a general estimate of WNV amplification as a proxy of WNV hazard. Continued refinement of the tool as more is learned about the ecology of WNV would increase its utility
Fullerene-Like Nanoballs Formed by Pentaphosphaferrocene and CuBr
Creators: name: Scheer, Manfred
name: Bai, Junfeng
name: Johnson, Brian P.
name: Merkle, Roger
name: Virovets, Alexander
name: Anson, Christopher E.
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: Polyphosphorus ligands; Fullerene-like molecules; Iron; Phosphorus; Cluster; Nanochemistry
subject: 540 Chemie

description: Reaction of [CpxFe(5-P5)] {Cpx = 5-C5Me5 (1a), 5-C5Me4Et (1b)} with CuBr leads to the fullerene-like nanoballs [{CpxFe(5:1:1:1:1:1-P5)}12{CuBr}10{Cu2Br3}5{Cu(CH3CN)2}5] {Cpx = 5-C5Me5 (5a), 5-C5Me4Et (5b)} comprising a cluster core of 90 non-carbon atoms. In contrast to previous results by variation of stoichiometry and concentration conditions, the formation of polymeric product was hindered, and exclusive formation of the spherical cage compound was achieved. The cluster 5b possesses an inside diameter of 1.29 nm and an outside diameter of 2.37 nm. Definitive evidence for encapsulation of a [CpxFe(5-P5)] unit (1b) within the inner cavity of the nanocluster 5b is shown by X-ray crystallographic results.
Tetraphosphacyclopentadienyl and Triphosphaallyl Ligands in Iron Complexes [Tetraphosphacyclopentadienyl- und Triphosphaallyl-Liganden in Eisenkomplexen]
Creators: name: Scheer, Manfred
name: Deng, Shining
name: Scherer, Otto J.
name: Sierka, Marek
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: density functional calculations; iron; metallocenes; phosphorus; polyphosphorus ligands
subject: 540 Chemie

description: Different faces of phosphorus chemistry: The reaction of the bicyclotetraphosphine complex 1 with tBuCP leads to the first 1,2,3,4-tetraphosphaferrocene complex 2 and an allylic P3-bridged complex 3. Cp=5-C5H2tBu3.
Synthesis and Characterisation of Novel Complexes Containing Group 15 Elements and Their Potential Use as Molecular Precursors for the Formation of Transition Metal Pnictides
Creators: name: Scheer, Manfred
name: Vogel, Ulf
name: Becker, Uta
name: Balzàs, Gàbor
name: Scheer, Petra
name: Hönle, Wolfgang
name: Becker, Michael
name: Jansen, Martin
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: Cobalt; Cluster compounds; Phosphorus; Thermochemistry; Tungsten
subject: 540 Chemie

description: The reaction of [{W(CO)5}2PCl] with K[Co(CO)4] yields the novel compounds [{W(CO)4Co2(CO)6}{µ3-PW(CO)5}2] (3) and [{(CO)4WCo3(CO)6}{µ3-PW(CO)5}3] (4) along with known derivatives [Co2(CO)6{,2-PW(CO)5}2] (1) and [Co3(CO)9{3-PW(CO)5}] (2). The complex [{W2(CO)8(-CO)}{,2:1:1-PW(CO)5}2)] (5) was synthesised by treating Na2[W2(CO)10] with PBr3. Reaction of K[Mn(CO)5] with SbCl3 affords [Sb{Mn(CO)5}3] (6) in high yields. The spectroscopic and structural characterisation of the novel products is discussed, as well as the thermolytic behaviour of 2, 3 and 6 for the potential formation of novel phases of transition metal pnictides.
Leveraging semantic context to establish access controls for secure cloud-based electronic health records
Creators: name: Walid, Redwan
name: Joshi, Karuna
name: Choi, Seung Geol
Publisher: name: Elsevier
Year: 2024
Subjects: Attribute Revocation
Cloud Security
Searchable Encryption (SE)
Attribute-Based Encryption (ABE)
Electronic Health Record (EHR)
Cloud Computing
UMBC Ebiquity Research Group
UMBC Knowledge, Analytics, Cognitive and Cloud Computing (KnACC) lab
Knowledge Graph
Attribute-Based Access Control (ABAC)

description: With the continuous growth of cloud-based Electronic Health Record (EHR) systems and medical data, medical organizations are particularly concerned about storing patient data to provide fast services while adhering to privacy and security concerns. Existing EHR systems often face challenges in handling heterogeneous data and maintaining good performance with data growth. These systems mostly use relational databases or partially store data in a knowledge graph, making it challenging to handle big data and allowing flexible schema expansion. Hence, there is a need to address these problems. This paper provides a solution by proposing a novel graph-based EHR system integrating Attribute-Based Encryption and Semantic Web Technologies to ensure fine-grained EHR field-level security of patient records. Our approach leverages semantic context to query through a knowledge graph that stores encrypted medical data in the nodes, making it possible to handle heterogeneous data while ensuring optimal performance and preserving patient privacy.
Reactivity of Lewis Acid/Base Stabilized Phosphanyl- and Arsanylboranes towards a Platinum(0) Complex
Creators: name: Vogel, Ulf
name: Schwan, Karl-Christian
name: Hoemensch, Petra
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: Arsenic; Boron; Phosphorus; Reactivity; Platinum
subject: 540 Chemie

description: The Lewis acid/base stabilized phosphanylboranes and -arsanes [(CO)5W(H2EBH2·NMe3)] (1a: E = P; 1b: E = As) have been shown to react with the platinum(0) complex [(Ph3P)2Pt(C2H4)] under oxidative addition of the E-H bond to the platinum center. The complexes cis-[(Ph3P)2Pt(H)(-EHBH2·NMe3)W(CO)5] (2a: E = P; 2b: E = As) are formed. Complex 2a is unstable in solution at room temperature and slowly reacts with loss of carbon monoxide to form [(Ph3P)2Pt(-H)(-EHBH2·NMe3)W(CO)4] (3a: E = P). An analogous complex 3b (E = As) is formed from 2b only by refluxing in CH2Cl2. The reaction of 2a to 3a can be reversed by addition of CO, whereas the arsenic compound 3b does not show this reactivity pattern. All new compounds have been comprehensively characterized by spectroscopy and X-ray crystallography.
Elementares Gallium als Quelle für niedervalente Gallium-Liganden in neuartigen Ga-Rh-Clustern
Creators: name: Scheer, Manfred
name: Kaupp, Martin
name: Virovets, Alexander V.
name: Konchenko, Sergej N.
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: Clusterverbindungen, ELF (Elektronenlokalisierungsfunktion); Gallium; Insertionen; Rhodium
subject: 540 Chemie

description: Als mildes Reduktionsmittel wirkt elementares Gallium auf Übergangsmetall-Halogen-Verbindungen: Bei der Reaktion von Ga mit [{CpRhCl2}2] (Cp=5-1,3-tBu2C5H3) konnten Cluster mit GaCl-Liganden und erstmals auch mit zweifach-koordinierten Galliumatomen in einer Mehrzentren-Mehrfachbindung zwischen zwei Rhodiumzentren erhalten werden (siehe Bild).
Employing word-embedding for schema matching in standard lifecycle management
Creators: name: Oh, Hakju
name: Kulvatunyou, Boonserm (Serm)
name: Jones, Albert
name: Finin, Tim
Publisher: name: Elsevier
Year: 2024
Subjects: Standards
Semantic-matching
Word-embedding
Frameworks
Integration
Semantics

description: Today, businesses rely on numerous information systems to achieve their production goals and improve their global competitiveness. Semantically integrating those systems is essential for businesses to achieve both. To do so, businesses must rely on standards, the most important of which are data exchange standards (DES). DES focus on technical and business semantics that are needed to deliver quality and timely products and services. Consequently, the ability for businesses to quickly use and adapt DES to their innovations and processes is crucial. Traditionally, information standards are managed and used 1) in a platform-specific form and 2) usually with standalone and file-based applications. These traditional approaches no longer meet today's business and information agility needs. For example, businesses now must deal with companies and suppliers that use heterogeneous syntaxes for their information. Syntaxes that are optimized for individual but have different objectives. Moreover, file-based standards and the usage specifications derived from the standards cause inconsistencies since there is neither a single standard format for each usage specification nor a single source of truth for all of them. As the number and types of information systems grow, developing, maintaining, reviewing, and approving standards and their derived usage specifications are becoming more difficult and time consuming. Each file-based usage specification is typically based on a different syntax than the standard syntax. As a result, each usage specification must be manually updated as the standard evolves; this can cause significant delays and costs in adopting the new and better standard versions. National Institute of Standards and Technology (NIST) in collaboration with the Open Application Groups Inc. (OAGi) has developed a web-based standard lifecycle management tool called SCORE to address these problems. The objective of this paper is to introduce the SCORE tool and discuss its particular functionality where a word-embedding technique has been employed along with other schema-matching approaches. Together they can assist standard users in updating the usage specification due to the release of new version of a standard leading to faster adaptations of DES to new processes.
The formation of Lewis acid/base stabilised phosphanyltrielanes – A theoretical and experimental study
Creators: name: Vogel, Ulf
name: Timoshkin, Alexey Y.
name: Schwan, Karl-Christian
name: Bodensteiner, Michael
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: DFT calculations; Mechanism; Group 13/15 compounds; X-ray structure analysis
subject: 540 Chemie

description: Theoretical investigations on the thermochemistry and the reaction mechanism of the formation of Lewis acid/base stabilised phosphanyltrielanes D · H2EPH2 · A (D = Lewis base, A = Lewis acid) were conducted. The reactions of EH3 · D with A · PH3 to form D · H2EPH2 · A and H2 (E = B, Al, Ga; D = NH3; A = BH3, Cr(CO)5) are all exothermic, regardless of whether donors and acceptors are present or absent. The lithium chloride elimination reactions between EH2Cl · D and A · PH2Li to give D · H2EPH2 · A and LiCl are endothermic for donor/acceptor stabilised compounds, if formation of gaseous LiCl is considered. If solid lithium chloride is considered all reactions are strongly exothermic. Studies of the transition state for H2-elimination reactions between EH3 · D and A · PH3 to yield D · H2EPH2 · A and H2 were only successful for E = Al, Ga. In these cases the reaction proceeds via a transition state featuring a five or six-coordinate group 13 element. Different donor molecules do not influence the activation energy of such H2-elimination reactions, but nevertheless they have an effect on the reaction energy. The synthesis of the Cr(CO)5 substituted phosphanyltrielanes [(CO)5Cr(H2PBH2 · NMe3)] (3a) and [(CO)5Cr(H2PAlH2 · NMe3)] (3b), as well as of the dinuclear complex [(CO)8Cr2(μ-HPBH2 · NMe3)2] (4) are described, the latter as a subsequent reaction product of the photolysis of 3a. All compounds were characterised spectroscopically and by X-ray structure analysis.
Elemental Gallium as a Source of Subvalent Gallium Units in Gallium-Rhodium Clusters [Elementares Gallium als Quelle für niedervalente Gallium-Liganden in neuartigen Ga-Rh-Clustern]
Creators: name: Scheer, Manfred
name: Kaupp, Martin
name: Virovets, Alexander V.
name: Konchenko, Sergej N.
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: cluster compounds; electron localization functions; gallium; insertions; rhodium
subject: 540 Chemie

description: Mild reduction with metals: Elemental gallium is used as mild reducing agent for transition-metal halides to generate subvalent GaCl ligands in novel clusters. In the reaction of Ga with [{CpRhCl2}] (Cp=5-1,3-C5H3tBu2), clusters with GaCl ligands and with unprecedented two-coordinate Ga centers in a multicenter-multiple-bonding interaction between two rhodium centers are formed (see picture).
Improvement effects of conditioners on properties of acidified-salinized soils and lettuce growth
Creators: name: Jie, Chen
name: Wenxiao, Wang
name: Jahan, Mohammad Shan
name: Guo, Shirong
name: Sun, Jin
name: Shu, Sheng
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: Continuous cropping soil in the facility cultivation area causes degradation of soil properties and activation of soil-borne pathogens. To investigate the effects of conditioners (biochar and vinegar residue) on the physico-chemical properties, enzyme activities, microorganisms of acidified and salinized soils, and their effects on the growth, photosynthesis, yield, and quality of lettuce, we performed the current study. The results showed that conditioners treatments increased the pH value of acidified and salinized soils, whereas significantly reduced the EC value. Moreover, the application of conditioners enhanced the activities of catalase, sucrase, urease and phosphatase, and the number of microorganisms in the acidified and salinized soils to an extent. The conditioners also increased plant height, fresh and dry weight of lettuce. Compared with acidified and salinized soils alone, T2∼T9 treatments remarkably increased the root vitality by 49.01%, 76.68%, 51.38%, 145.06%, 110.67%, 77.87%, 30.43% and 52.96%, respectively. In addition, the net photosynthetic rate (Pn), vitamin C content, soluble sugar content and yield of lettuce treated with T5 (20 g biochar and 20 g vinegar residue) increased by 119.61%, 82.32%, 49.89%, and 64.82%, respectively, but decreased the nitrate content by 26.62%. These results indicated that the conditioners improved the physical and chemical properties of acidified-salinized soils, and increased the growth, yield, and quality of lettuce. Among the treatments, the best improvement effect was observed in T5 treatment that biochar and vinegar residue were mixed at the ratio of 1: 1 (w/w).
A boundary element regularised Stokeslet method applied to cilia and flagella-driven flow
Creators: name: Smith, David J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: 76Z05

description: A boundary element implementation of the regularised Stokeslet method of Cortez is applied to cilia and flagella-driven flows in biology. Previously-published approaches implicitly combine the force discretisation and the numerical quadrature used to evaluate boundary integrals. By contrast, a boundary element method can be implemented by discretising the force using basis functions, and calculating integrals using accurate numerical or analytic integration. This substantially weakens the coupling of the mesh size for the force and the regularisation parameter, and greatly reduces the number of degrees of freedom required. When modelling a cilium or flagellum as a one-dimensional filament, the regularisation parameter can be considered a proxy for the body radius, as opposed to being a parameter used to minimise numerical errors. Modelling a patch of cilia, it is found that: (1) For a fixed number of cilia, reducing cilia spacing reduces transport. (2) For fixed patch dimension, increasing cilia number increases the transport, up to a plateau at $9\times 9$ cilia. Modelling a choanoflagellate cell it is found that the presence of a lorica structure significantly affects transport and flow outside the lorica, but does not significantly alter the force experienced by the flagellum.
description: 20 pages, 7 figures, postprint
Spherical Cluster Comprising a Four- and Six-Membered-Ring Motif [Ein sphärischer Cluster aus Vier- und Sechsringeinheiten]
Creators: name: Johnson, Brian P.
name: Dielmann, Fabian
name: Balázs, Gábor
name: Sierka, Marek
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: cluster compounds; density functional calculations; fullerenes; phosphorus; tantalum
subject: 540 Chemie

description: Magic ball: A spherical aggregate containing a core of 32 inorganic atoms (see structure) was prepared by coordination of a cyclo-P4 tantalum complex to copper(I) chloride. The phosphorus/copper core exhibits an arrangement of alternating four- and six-membered rings, which are reminiscent of the hypothetical Oh-symmetric fullerene C32.
Antimon-Wolfram-Dreifachbindung: ein stabiler Komplex mit terminalem Sb-Liganden
Creators: name: Balázs, Gábor
name: Sierka, Marek
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: Antimon; Bindungsanalyse; Dichtefunktionalrechnungen; Pnicogenliganden; Wolfram
subject: 540 Chemie

description: Das intermediär gebildete Li[(Me3Si)2CHSb(H)] reagiert mit [(N3N)WCl] zu [(N3N)WSb], dem ersten Komplex mit einem terminalen Sb-Liganden (siehe Struktur). Spektroskopische Eigenschaften und die Röntgenkristallstruktur bestätigen das Vorliegen einer WSb-Dreifachbindung, und ein Vergleich der Bindungssituation in der Reihe [(N3N)WE] (E=P, As, Sb, Bi) weist auf eine nur schwache Polarisierung der Bindung hin.
Two Local Observables are Sufficient to Characterize Maximally Entangled States of N Qubits
Creators: name: Yan, Fengli
name: Gao, Ting
name: Chitambar, Eric
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Maximally entangled states (MES) represent a valuable resource in quantum information processing. In $N$-qubit systems the MES are $N$-GHZ states, i.e. the collection of $\ket{GHZ_N}=\frac{1}{\sqrt{2}}(\ket{00...0}+\ket{11...1})$ and its local unitary (LU) equivalences. While it is well-known that such states are uniquely stabilized by $N$ commuting observables, in this Letter we consider the minimum number of non-commuting observables needed to characterize an $N$-qubit MES as the unique common eigenstate. Here, we prove that in this general case, any $N$-GHZ state can be uniquely stabilized by only two observables. Thus, for the task of MES certification, only two correlated measurements are required with each party observing the spin of his/her system along one of two directions.
Privacy-Preserving Data Sharing in Agriculture: Enforcing Policy Rules for Secure and Confidential Data Synthesis
Creators: name: Kotal, Anantaa
name: Elluri, Lavanya
name: Gupta, Deepti
name: Mandalapu, Varun
name: Joshi, Anupam
Publisher: name: IEEE
Year: 2023
Subjects: Data privacy
Codes
Task analysis
Privacy Attacks
UMBC Ebiquity Research Group
Agriculture
General Data Protection Regulation
Data Privacy
Big data in Agriculture
Big Data
Surveys
Privacy Policy

description: 2023 IEEE International Conference on Big Data (BigData), 15-18 December 2023, Sorrento, Italy
description: Big Data empowers the farming community with the information needed to optimize resource usage, increase productivity, and enhance the sustainability of agricultural practices. The use of Big Data in farming requires the collection and analysis of data from various sources such as sensors, satellites, and farmer surveys. While Big Data can provide the farming community with valuable insights and improve efficiency, there is significant concern regarding the security of this data as well as the privacy of the participants. Privacy regulations, such as the European Union’s General Data Protection Regulation (GDPR), the EU Code of Conduct on agricultural data sharing by contractual agreement, and the proposed EU AI law, have been created to address the issue of data privacy and provide specific guidelines on when and how data can be shared between organizations. To make confidential agricultural data widely available for Big Data analysis without violating the privacy of the data subjects, we consider privacy-preserving methods of data sharing in agriculture. Synthetic data that retains the statistical properties of the original data but does not include actual individuals’ information provides a suitable alternative to sharing sensitive datasets. Deep learning-based synthetic data generation has been proposed for privacy-preserving data sharing. However, there is a lack of compliance with documented data privacy policies in such privacy-preserving efforts. In this study, we propose a novel framework for enforcing privacy policy rules in privacy-preserving data generation algorithms. We explore several available agricultural codes of conduct, extract knowledge related to the privacy constraints in data, and use the extracted knowledge to define privacy bounds in a privacy-preserving generative model. We use our framework to generate synthetic agricultural data and present experimental results that demonstrate the utility of the synthetic dataset in downstream tasks. We also show that our framework can evade potential threats, such as re-identification and linkage issues, and secure data based on applicable regulatory policy rules.
Lewis Base Stabilized Phosphanylborane
Creators: name: Schwan, Karl-Christian
name: Timoshkin, Alexey Y.
name: Zabel, Manfred
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: boron; density functional calculations; Lewis bases; phosphorus
subject: 540 Chemie

description: The abstraction of the Lewis acid from [W(CO)5(PH2BH2NMe3)] (1) by an excess of P(OMe3)3 leads to the quantitative formation of the first Lewis base stabilized monomeric parent compound of phosphanylborane [H2PBH2NMe3] 2. Density functional theory (DFT) calculations have shown a low energetic difference between the crystallographically determined antiperiplanar arrangement of the lone pair and the trimethylamine group relative to the PB core and the synperiplanar conformation. Subsequent reactions with the main-group Lewis acid BH3 as well as with an [Fe(CO)4] unit as a transition-metal Lewis acid led to the formation of [(BH3)PH2BH2NMe3] (3), containing a central H3BPH2BH2 unit, and [Fe(CO)4(PH2BH2NMe3)] (4), respectively. In oxidation processes with O2, Me3NO, elemental sulfur, and selenium, the boranylphosphine chalcogenides [H2P(Q)BH2NMe3] (Q = S 5 b; Se 5 c) as well as the novel boranyl phosphonic acid [(HO)2P(O)BH2NMe3] (6 a) are formed. All products have been characterized by spectroscopic as well as by single-crystal X-ray structure analysis.
Hydrodimetalation of tert-Butylphosphaethyne by a Diruthenium Complex: Crystal and Molecular Structure of [Ru2(CO)4(μ-PBut2)(μ-Ph2PCH2PPh2){μ-PC(H)But}]
Creators: name: Böttcher, Hans-Christian
name: Himmel, Daniel
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 540 Chemie

description: The reaction of [Ru2(CO)3(PBun3)(μ-H)(μ-PBut2)(μ-dppm)] (1a) with tert-butylphosphaethyne leads under hydrodimetalation to the novel phosphaethenyl complex [Ru2(CO)4(μ-PBut2)(μ-dppm){μ-PC(H)But}] (2), which has been characterized by spectroscopic methods as well as by X-ray diffraction. Compound 2 represents the first structurally characterized complex with a phosphaalkenyl ligand of the type μ-PC(H)R bridging two metal centers.
Low-coordinate E1 ligand complexes of Group 15 elements—A developing area
Creators: name: Johnson, Brian P.
name: Balázs, Gábor
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: Group 15 elements; Pnicogenido ligands; Multiple bonds
subject: 540 Chemie

description: A survey of transition–metal complexes with substituent-free Group 15 E1 ligands of coordination numbers 1 and 2 is presented. Such ligands exhibit interesting bonding properties and diverse reactivity patterns including cycloadditions, redox, and single-atom transfer. The various modes of coordination and relevant aspects to each regarding synthesis, bonding, and reactivity are summarized.
Second Molecular Hyperpolarizability of Mixed Transition Metal, Non-Metal Clusters
Creators: name: Mathur, Pradeep
name: Chatterjee, Saurav
name: Singh, Bishnu P.
name: Kundu, Tapan
name: Trivedi, Rajiv
name: Umbarkar, Shubhangi B.
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: Non-linear; optical; mixed-metal; iron; chromium; carbonyl
subject: 540 Chemie

description: The real and imaginary parts of third order nonlinear optical susceptibilities (chi (3)) of 10–4M solutions of [{Fe2(CO)6}(mgr 3-Y3P){CpCr(CO)2}] (Y=S (1) or Se (2)) and the well known precursor clusters [Fe3(CO)9(mgr 3-Y)2] (Y=S (3) or Se (4)) in toluene were measured using Z-scan and ARINS techniques respectively. Compounds 1 and 2 possess nearly three times the gamma R values of their corresponding precursor compounds, 3 and 4. The results suggest a rich potential of mixed-metal, mixed-nonmetal class of clusters as materials exhibiting large nonlinearity.
LiE(SiMe3)2 (E = P, As) als Synthesebaustein zur Darstellung von Molybdänkomplexen mit EH funktionellen Liganden
Creators: name: Vogel, Ulf
name: Scheer, Manfred
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: Arsenic; Crystal structure; Gallium; Molybdenum; Phosphorus
subject: 540 Chemie

description: Der Komplex [{CpMo(CO)2}2(-H)(-PH2)] (1) wird in einer Eintopfreaktion aus [CpMo(CO)2]2, LiP(SiMe3)2, MeOH und HBF4 in guten Ausbeuten erhalten. In einer zur Darstellung von 1 analogen Reaktion ausgehend von LiAs(SiMe3)2 konnten die Verbindungen [{CpMo(CO)2}2(, 2-As2)] und -[{CpMo(CO)2}2(-H)(4-As){CpMo(CO)2}2(4, 1:1-As2H){CpMo(CO)2}2(-H)] (3) isoliert werden. Das deprotonierte Derivat von 1, K[{CpMo(CO)2}2(-PH2)] (2), das mittels Metallierung mit KH gebildet wird, reagiert mit GaCl3 nicht wie erwartet unter KCl-Eliminierung. Stattdessen bildet sich das Lewis Säure/Base-Addukt K[{CpMo(CO)2}2(-PH2)(GaCl3)] (4), das im Festkörper eine polymere Kettenstruktur ausbildet. Die spektroskopischen und strukturellen Daten der Produkte werden diskutiert.
The Gras conjecture in function fields by Euler systems
Creators: name: Oukhaba, Hassan
name: Viguié, Stéphane
Publisher: name: arXiv
Year: 2011
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11R58 (Primary) 11G09 (Secondary)

description: We use Euler systems to prove the Gras conjecture for groups generated by Stark units in global function fields. The techniques applied here are classical and go back to Thaine, Kolyvagin and Rubin. We obtain our Euler systems from the torsion points of sign-normalized Drinfel'd modules.
description: accepted for publication in the Bulletin of the London Mathematical Society
A geometric solution to the coincidence problem, and the size of the landscape as the origin of hierarchy
Creators: name: Bousso, Raphael
name: Freivogel, Ben
name: Leichenauer, Stefan
name: Rosenhaus, Vladimir
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Without assuming necessary conditions for observers such as galaxies or entropy production, we show that the causal patch measure predicts the coincidence of vacuum energy and present matter density. Their common scale, and thus the enormous size of the visible universe, has its origin in the number of metastable vacua in the landscape.
description: 5 pages, 2 figures. v2: minor editing
Multimodal Language Learning for Object Retrieval in Low Data Regimes in the Face of Missing Modalities
Creators: name: Darvish, Kasra
name: Raff, Edward
name: Ferraro, Francis
name: Matuszek, Cynthia
Publisher: name: OpenReview
Year: 2023
Subjects: UMBC Discovery, Research, and Experimental Analysis of Malware Lab (DREAM Lab)
UMBC Interactive Robotics and Language Lab (IRAL Lab)
UMBC Interactive Robotics and Language Lab

description: Our study is motivated by robotics, where when dealing with robots or other physical systems, we often need to balance competing concerns of relying on complex, multimodal data coming from a variety of sensors with a general lack of large representative datasets. Despite the complexity of modern robotic platforms and the need for multimodal interaction, there has been little research on integrating more than two modalities in a low data regime with the real-world constraint that sensors fail due to obstructions or adverse conditions. In this work, we consider a case in which natural language is used as a retrieval query against objects, represented across multiple modalities, in a physical environment. We introduce extended multimodal alignment (EMMA), a method that learns to select the appropriate object while jointly refining modality-specific embeddings through a geometric (distance-based) loss. In contrast to prior work, our approach is able to incorporate an arbitrary number of views (modalities) of a particular piece of data. We demonstrate the efficacy of our model on a grounded language object retrieval scenario. We show that our model outperforms state-of-the-art baselines when little training data is available. Our code is available at https://github.com/kasraprime/EMMA.
A deep insight into the Mg-Al nucleosynthesis in massive AGBs and SAGB stars
Creators: name: Ventura, Paolo
name: Carini, Roberta
name: D'Antona, Francesca
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The stars in globular clusters are known to differ in their surface chemistry: the spectroscopic investigations in the last decades outlined the presence of star-to-star differences in the abundances of the light elements, up to aluminium (and possibly silicon), suggesting that some stars were contaminated by an advanced proton-capture nucleosynthesis. The AGB stars are one of the most promising candidates in producing the pollution of the intra-cluster medium, via the ejection of gas processed by Hot Bottom Burning, from which new stellar generations are formed. This work is focused on the degree of nucleosynthesis involving magnesium, aluminium and silicon that these sources may experience. The key ingredient to determine the degree of magnesium depletion, and the amount of aluminium that can be produced, is the rate of proton capture on Mg25, forming Al26; an increase in this cross-section by a factor 2 with respect to the highest value allowed by the NACRE compilation allows to reproduce the extent of the Mg-depletion observed, and is in qualitative agreement with the positive Al-Si correlation observed in a few clusters. The main uncertainties associated with the macro- and micro-physics input, are discussed and commented, and the comparison with recent spectroscopic results for the globular cluster showing some degree of Mg-Al anticorrelation and Al-Si correlation is presented.
description: accepted for pubblication on MNRAS. 8 pages, 6 figures
Semantically-informed Hierarchical Event Modeling
Creators: name: Roy Dipta, Shubhashis
name: Rezaee, Mehdi
name: Ferraro, Francis
Publisher: name: ACL
Year: 2023

description: Proceedings of the 12th Joint Conference on Lexical and Computational Semantics (*SEM 2023), July, 2023, Toronto, Canada
description: Prior work has shown that coupling sequential latent variable models with semantic ontological knowledge can improve the representational capabilities of event modeling approaches. In this work, we present a novel, doubly hierarchical, semi-supervised event modeling framework that provides structural hierarchy while also accounting for ontological hierarchy. Our approach consistsof multiple layers of structured latent variables, where each successive layer compresses and abstracts the previous layers. We guide this compression through the injection of structured ontological knowledge that is defined at the type level of events: importantly, our model allows for partial injection of semantic knowledge and it does not depend on observing instances at any particular level of the semantic ontology. Across two different datasets and four different evaluation metrics, we demonstrate that our approach is able to out-perform the previous state-of-the-art approaches by up to 8.5%, demonstrating the benefits of structured and semantic hierarchical knowledge for event modeling.