cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Formation of polymeric assemblies of six-coordinate metal complexes with mixed bridges of dicarboxylato-azido moieties
Creators: name: Ahmed, Riyadh M.
name: Taki A. Hamdan
name: Numan, Ahmed T.
name: Al-Jeboori, Mohamad J.
name: Potgieter, Herman
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Biological Sciences
subject: Astronomy, Astrophysics, Space Science
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Biotechnology
subject: Cell Biology
subject: Microbiology
subject: FOS: Biological sciences
subject: Physics
subject: Biochemistry
subject: Biophysics

description: New biscarboxylato zwitterionic ligands, namely bis(N-carboxylatoethyl)-4,4′-dipyridinum) L1 and bis(N-carboxylatopropyl)-)-4,4′-dipyridinum) L2, were synthesized from the reaction of 4,4′-dipyridine with 3-bromopropanoic acid and 4-bromobutanoic acid, respectively. The reaction of these ligands and the azido coligand with some metal ions resulted in the formation of polymeric complexes of general formulae [Cr2(Ln)(N3)4]Cl2·H2O and [M2(Ln)(N3)4] xH2O, where (M=Mn (II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II); n=1, 2; x=1, 1, 1, 1, 0, 1, and 1, respectively.) The oxygens of the carboxylato group are coordinated to the metal ion in a bidentate fashion. The mode of bonding and overall geometry of the complexes were determined through IR, UV–VIS, NMR and mass spectral studies, magnetic moment measurements, elemental analysis, metal content, chloride content and conductance. These studies revealed the formation of polymeric assemblies of six-coordinate complexes with distorted octahedral geometries about metal centers.
Synthesis and characterization of 5-amino-2-((3-hydroxy-4-((3-hydroxyphenyl) phenyl) diazenyl) phenol and its Cu(II) complex – a strategy toward developing azo complexes for reduction of cytotoxicity
Creators: name: Santra, Ramesh Chandra
name: Saurabh Das
name: Durba Ganguly
name: Ratul Sarkar
name: Tathagata Deb
name: Tuhinadri Sen
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Cancer
subject: Biological Sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Biotechnology
subject: Cell Biology
subject: Microbiology
subject: FOS: Biological sciences
subject: Biochemistry

description: A major drawback of azo compounds is their associated toxicity, often carcinogenic, which is related to the reduction of the azo bond. This study intends to re-investigate this behavior by studying 5-amino-2-((3-hydroxy-4-((3-hydroxyphenyl) phenyl) diazenyl) phenol (AHPD), a compound containing two azo bonds. Interaction of AHPD and its dimeric Cu(II) complex with bacterial strains Escherichia coli and Staphylococcus aureus revealed the complex was less toxic. Reductive cleavage of the azo bond in AHPD and the complex followed using cytochrome c reductase (a model azo-reductase) as well as azo-reductase enzymes obtained from bacterial cell extracts. Degradation of the azo bond was less in the complex allowing us to correlate the observed cytotoxicity. Cyclic voltammetry on AHPD and the complex support observations of enzyme assay experiments. These were particularly useful in realizing the formation of amines as an outcome of the reductive cleavage of azo bonds in AHPD that could not be identified through an enzyme assay. Results suggest that complex formation of azo compounds could be a means to control the formation of amines responsible for cytotoxicity. Studies carried out on bacterial cells for mere simplicity bear significance for multicellular organisms and could be important for human beings involved with the preparation and utilization of azo dyes.
Ru(II) trithiacyclononane 5-(2-hydroxyphenyl)-3-[(4-methoxystyryl)pyrazole], a complex with facile synthesis and high cytotoxicity against PC-3 and MDA-MB-231 cells
Creators: name: J. Marques
name: V.L.M. Silva
name: A.M.S. Silva
name: M.P.M. Marques
name: S.S. Braga
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Cancer
subject: Developmental Biology
subject: Biological Sciences
subject: Chemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Cell Biology
subject: Biochemistry
subject: Biophysics

description: The ruthenium(II) complex [Ru([9]aneS 3)(phpz)Cl 2] (1) ([9]aneS 3=trithiacyclononane, phpz=5-(2- hydroxyphenyl)-3-[(4-methoxystyryl)pyrazole]) was readily isolated by reacting [Ru([9]aneS 3)(DMSO)Cl 2] with one equivalent of the ligand phpz. A combination of MS, FT–IR and solution NMR studies (1-D and 2-D) was employed to determine the structural formula of the complex 1, in which phpz coordinates in a monodentate mode to Ru(II) by a simple replacement of the leaving group DMSO of the precursor. The cytotoxic properties of 1in vitro were investigated by determination of the half-maximal growth inhibition on the human prostate (PC-3) and breast cancer cells (MDA-MB-231).
SQSTM1/p62 regulates the expression of junctional proteins through epithelial-mesenchymal transition factors
Creators: name: Bertrand, Matthieu
name: Petit, Valérie
name: Jain, Ashish
name: Amsellem, Raymonde
name: Johansen, Terje
name: Larue, Lionel
name: Codogno, Patrice
name: Beau, Isabelle
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: The epithelial to mesenchymal transition (EMT) is an essential process during development and during tumor progression. Here, we observed the accumulation of the selective autophagy receptor and signaling adaptor sequestosome-1 (SQSTM1/p62) during growth factor-induced EMT in immortalized and tumor-derived epithelial cell lines. Modulation of the p62 level regulated the expression of junctional proteins. This effect was dependent on the ubiquitin-associated domain of p62, which stabilized the TGFβ/Smad signaling co-activator Smad4 and the EMT transcription factor Twist. This study highlights a novel function of p62 in a major epithelial phenotypic alteration.
Synthesis, characterization, fluorescence and biological studies of Mn(II), Fe(III) and Zn(II) complexes of Schiff bases derived from Isatin and 3-substituted-4-amino-5-mercapto-1,2,4-triazoles
Creators: name: Sangamesh A. Patil
name: M. Manjunatha
name: Ajaykumar D. Kulkarni
name: Prema S. Badami
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Biological Sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Biotechnology
subject: Microbiology
subject: FOS: Biological sciences
subject: Biochemistry

description: A series of Mn(II), Fe(III) and Zn(II) complexes have been synthesized with Schiff bases derived from isatin and 3-substituted-4-amino-5-mercapto-1,2,4-triazole. The elemental, spectroscopic (Infrared, nuclear magnetic resonance, ultraviolet-visible, fast atom bombardment-mass, fluorescence and electrochemistry) and magnetic studies suggested that the metal complexes possess octahedral geometry. The Schiff bases and their metal complexes exhibit fluorescent properties. The antimicrobial studies of Schiff bases and their metal complexes against various bacterial (Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Bacillus subtilis) and fungal (Aspergillus niger, and Penicillium chrysogenum) species by the minimum inhibitory concentration method revealed that the metal complexes possess more healing antibacterial activities than the Schiff bases. DNA cleavage property of Mn(II), Fe(III) and Zn(II) complexes revealed the important role of metal ion in the biological system.
Synthesis, spectral characterization and biological activity studies of transition metal complexes of Schiff base ligand containing indole moiety
Creators: name: Fazlur Rahaman
name: B.H.M. Mruthyunjayaswamy
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Biological Sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Physiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Microbiology
subject: Physics
subject: Biochemistry

description: A new series of transition metal complexes of Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II), with a tridentate (oxygen nitrogen nitrogen) ligand 3,5-dimethyl-N′-[(1E)-1′-pyridin-2′-ylethylidene]-1H-indole-2-carbohydrazide (L) have been synthesized and characterized on the basis of analytical, magnetic susceptibility, infra red, nuclear magnetic resonance, fast atom bombardment-mass, electron paramagnetic resonance spectral studies, X-ray powder diffraction and UV-visible spectral data. Based on analytical and molar conductance data, the complexes may be formulated as [M(L)2]·(H2O)n, where M˭ Co, Cu and Ni and [M(L)Cl2].(H2O)n, where M=Zn, Cd and Hg. The spectral studies revealed that, an octahedral geometry for Co(II), Ni(II) and Cu(II) complexes, whereas square pyramidal geometry for Zn(II), Cd(II) and Hg(II) complexes. The ligand and its Co(II) complex have been characterized by X-ray powder diffraction studies. The ligand and its complexes were tested for their antibacterial activity against Escherichia coli & Staphyloccocus aureus and antifungal activity against Aspergillus niger & Candida albicans.
Syntheses, characterizations, X-ray crystal structures, and antibacterial activities of Co(II), Ni(II), and Zn(II) complexes of the Schiff base derived from 5-nitro-2-hydroxybenzaldehyde and benzylamine
Creators: name: Amirnasr, Mehdi
name: Roghayeh Sadeghi Erami
name: Mereiter, Kurt
name: Joß, Kurt Schenk
name: Soraia Meghdadi
name: Abbasi, Soheila
Publisher: name: Taylor & Francis
Year: 2015
Subjects: Biological Sciences
Chemistry
Earth and Environmental Sciences
Biotechnology
Molecular Biology
Cell Biology
Biochemistry
Biophysics

description: Three new complexes, [CoIIL2(bzln)2] (1), [NiIIL2(DMF)2] (2), and [ZnIIL2] (3), with the bidentate (NO) Schiff base HL = 2-((E)-(benzylimino)methyl)-4-nitrophenol have been synthesized and characterized. [CoIIL2(bzln)2] (1) was initially formed from the reaction of H2L1 (N,N′-bis(5-nitrobenzaldehyde)-2-aminobenzylamine = H2L1), with CoII(CH3COO)2·4H2O in the presence of benzylamine. The X-ray crystal structure of 1 revealed that HL was formed from the hydrolysis of H2L1 and the recondensation of benzylamine with 2-hydroxy-5-nitrobenzaldehyde produced in H2L1 hydrolysis. The Schiff base HL was then prepared by direct reaction of 2-hydroxy-5-nitrobenzaldehyde and benzylamine. Complexes 1–3 were also directly synthesized and their crystal and molecular structures determined by X-ray crystallography. The ligand and its metal complexes were also screened for in vitro antibacterial activity.
The cc-pV5Z-F12 basis set: reaching the basis set limit in explicitly correlated calculations
Creators: name: Peterson, Kirk A.
name: Kesharwani, Manoj K.
name: Martin, Jan M.L.
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
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: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Plant Biology

description: We have developed and benchmarked a new extended basis set for explicitly correlated calculations, namely cc-pV5Z-F12. It is offered in two variants, cc-pV5Z-F12 and cc-pV5Z-F12(rev2), the latter of which has additional basis functions on hydrogen not present in the cc-pVnZ-F12 (n = D,T,Q) sequence. A large uncontracted ‘reference’ basis set is used for benchmarking. cc-pVnZ-F12 (n = D–5) is shown to be a convergent hierarchy. Especially the cc-pV5Z-F12(rev2) basis set can yield the valence CCSD (coupled cluster with all single and double substitutions) component of total atomisation energies, without any extrapolation, to an accuracy normally associated with aug-cc-pV{5,6}Z extrapolations. Hartree-Fock self-consistent field (SCF) components are functionally at the basis set limit, while the MP2 limit can be approached to as little as 0.01 kcal/mol without extrapolation. The determination of (T) appears to be the most difficult of the three components and cannot presently be accomplished without extrapolation or scaling. (T) extrapolation from cc-pV{T,Q}Z-F12 basis sets, combined with CCSD-F12b/cc-pV5Z-F12 calculations, appears to be an accurate combination for explicitly correlated thermochemistry. For accurate work on noncovalent interactions, the basis set superposition error with the cc-pV5Z-F12 basis set is shown to be so small that counterpoise corrections can be neglected for all but the most exacting purposes.
SQSTM1/p62 regulates the expression of junctional proteins through Epithelial-Mesenchymal Transition factors
Creators: name: Bertrand, Matthieu
name: Petit, Valérie
name: Jain, Ashish
name: Amsellem, Raymonde
name: Johansen, Terje
name: Larue, Lionel
name: Codogno, Patrice
name: Beau, Isabelle
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Cancer
subject: Developmental Biology
subject: Biological Sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Cell Biology

description: ABSTRACTThe epithelial to mesenchymal transition (EMT) is an essential process during development and during tumour progression. Here, we observed the accumulation of the selective autophagy receptor and signalling adaptor sequestosome-1 (SQSTM1/p62) during growth factor-induced EMT in immortalized and tumour-derived epithelial cell lines. Modulation of the p62 level regulated the expression of junctional proteins. This effect was dependent on the ubiquitin-associated domain of p62, which stabilized the TGFβ/Smad signalling co-activator Smad4 and the EMT transcription factor Twist. This study highlights a novel function of p62 in a major epithelial phenotypic alteration.
Crashkurs Forschungsdatenmanagement (Online-Version)
Creators: name: Weiner, Barbara
name: Wünsche, Stephan
name: Kühne, Stefan
name: Voigt, Pia
name: Frericks, Sebastian
name: Gey, Ronny
name: Elze, Romy
name: Hoffmann, Clemens
Publisher: name: Zenodo
Year: 2020
Subjects: Forschungsdatenmanagement
Research Data Management
Forschungsdaten
Research Data
Training Materials
Open Data
Forschungsdaten Universität Leipzig
Open Science Universität Leipzig

description: ACHTUNG: VERSION 1.0 IST FEHLERHAFT. BITTE ZUNÄCHST NICHT HERUNTERLADEN! VERSION 2.0 IST IN BEARBEITUNG UND WIRD AN DIESER STELLE VERLINKT! VIELEN DANK FÜR IHR VERSTÄNDNIS. Diese Präsentation bietet einen Einstieg in alle relevanten Bereiche des Forschungsdatenmanagements und die hierfür angebotenen Dienste an der Universität Leipzig. Die behandelten Themen bieten einen Überblick über die Grundlagen, technische Aspekte, Archivierung und Publikation von Forschungsdaten sowie einen Überblick über rechtliche und ethische Aspekte des Forschungsdatenmanagements. Die Präsentation enthält zahlreiche weiterführende Links (rot) und Literaturhinweise. Ergänzend hierzu wird eine Präsentation mit Übungsaufgaben angeboten, die helfen soll, das Gelernte zu festigen und in der eigenen Forschungspraxis umzusetzen. Den Aufgaben folgen jeweils eine Antwortfolie sowie deren Auflösung.
description: Zielgruppen sind Forschende, Lehrende, Mitarbeiter*innen und Studierende der Universität Leipzig und anderer Forschungseinrichtungen.
Virasoro Constraint for Uglov Matrix Model
Creators: name: Khlaif, Osama
name: Kimura, Taro
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the root of unity limit of $(\textbf{q}, \textbf{t})$-deformed Virasoro matrix models, for which we call the resulting model Uglov matrix model. We derive the associated Virasoro constraints on the partition function and find agreement of the central charge with the expression obtained from the level-rank duality associated with the parafermion CFT.
description: 15 pages
Strain effect on Goos-Hänchen shifts and group delay time in gapped graphene barrier
Creators: name: Mekkaoui, Miloud
name: Fattasse, Youssef
name: Jellal, Ahmed
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the strain effect on the Goos-Hänchen (GH) shifts and group delay time for transmitted Dirac fermions in gapped graphene through a single barrier potential. The solutions of energy spectrum are used to compute the transmission probabilities together with the GH shifts and group delay time. Our results show that the two last quantities are strongly depending to weather the strain is applied along armchair or zigzag directions. In particular it found that both of quantities can be enhanced with the applied strain.
description: 7 pages, 7 figures
The cc-pV5Z-F12 basis set: reaching the basis set limit in explicitly correlated calculations
Creators: name: Peterson, Kirk A.
name: Kesharwani, Manoj K.
name: Martin, Jan M.L.
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Plant Biology
subject: FOS: Biological sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Cancer
subject: Mathematics
subject: FOS: Mathematics
subject: Biological Sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Biotechnology
subject: Pharmacology
subject: Physiology
subject: Molecular Biology
subject: Biochemistry

description: We have developed and benchmarked a new extended basis set for explicitly correlated calculations, namely cc-pV5Z-F12. It is offered in two variants, cc-pV5Z-F12 and cc-pV5Z-F12(rev2), the latter of which has additional basis functions on hydrogen not present in the cc-pVnZ-F12 (n = D,T,Q) sequence. A large uncontracted ‘reference’ basis set is used for benchmarking. cc-pVnZ-F12 (n = D–5) is shown to be a convergent hierarchy. Especially the cc-pV5Z-F12(rev2) basis set can yield the valence CCSD (coupled cluster with all single and double substitutions) component of total atomisation energies, without any extrapolation, to an accuracy normally associated with aug-cc-pV{5,6}Z extrapolations. Hartree-Fock self-consistent field (SCF) components are functionally at the basis set limit, while the MP2 limit can be approached to as little as 0.01 kcal/mol without extrapolation. The determination of (T) appears to be the most difficult of the three components and cannot presently be accomplished without extrapolation or scaling. (T) extrapolation from cc-pV{T,Q}Z-F12 basis sets, combined with CCSD-F12b/cc-pV5Z-F12 calculations, appears to be an accurate combination for explicitly correlated thermochemistry. For accurate work on noncovalent interactions, the basis set superposition error with the cc-pV5Z-F12 basis set is shown to be so small that counterpoise corrections can be neglected for all but the most exacting purposes.
A fast radio burst progenitor born in a galaxy merger
Creators: name: Kaur, Balpreet
name: Kanekar, Nissim
name: Prochaska, J. Xavier
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report a Giant Metrewave Radio Telescope HI 21cm mapping study of the neutral atomic hydrogen (HI) in the host galaxy of the fast radio burst (FRB) FRB20180916B at $z \approx 0.03399$. We find that the FRB host has an HI mass of $\rm M_{HI} = (2.74 \pm 0.33) \times 10^9 \ M_\odot$ and a high HI-to-stellar mass ratio, $\approx 1.3$. The FRB host is thus a gas-rich but near-quiescent galaxy, that is likely to have acquired a significant mass of HI in the recent past. The HI distribution is disturbed, with extended HI 21cm emission detected in a north-eastern tail, a counter-tail towards the south, an HI hole between the galaxy centre and the FRB location, and a high HI column density measured close to the FRB position. The FRB host is part of a group with four companions detected in their HI 21cm emission, the nearest of which is only 22~kpc from the FRB location. The gas-richness and disturbed HI distribution indicate that the FRB host has recently undergone a minor merger, which increased its HI mass, disturbed the HI in the galaxy disk, and compressed the HI near the FRB location to increase its surface density. We propose that this merger caused the burst of star-formation in the outskirts of the galaxy that gave rise to the FRB progenitor. The evidence for a minor merger is consistent with scenarios in which the FRB progenitor is a massive star, formed due to the merger event.
description: 9 pages, 5 figures. Accepted for publication in ApJL
Syntheses, characterizations, X-ray crystal structures and antibacterial activities of Co(II), Ni(II) and Zn(II) complexes of the Schiff base derived from 5-nitro-2-hydroxybenzaldehyde and benzylamine
Creators: name: Amirnasr, Mehdi
name: Roghayeh Sadeghi Erami
name: Mereiter, Kurt
name: Joß, Kurt Schenk
name: Soraia Meghdadi
name: Abbasi, Soheila
Publisher: name: Taylor & Francis
Year: 2015
Subjects: Biological Sciences
Chemistry
Earth and Environmental Sciences
Biotechnology
Molecular Biology
Cell Biology
Biochemistry
Biophysics

description: Three new complexes, [CoIIL2(bzln)2] (1), [NiIIL2(DMF)2] (2) and [ZnIIL2] (3), with the bidentate (NO) Schiff base HL = 2-((E)-(benzylimino)methyl)-4-nitrophenol have been synthesized and characterized. [CoIIL2(bzln)2] (1) was initially formed from reaction of H2L1 (N,N′-bis(5-nitrobenzaldehyde)-2-aminobenzylamine = H2L1), with CoII(CH3COO)2·4H2O in the presence of benzylamine. The X-ray crystal structure of 1 revealed that HL was formed from the hydrolysis of H2L1 and the recondensation of benzylamine with 2-hydroxy-5-nitrobenzaldehyde produced in H2L1 hydrolysis. The Schiff base HL was then prepared by direct reaction of 2-hydroxy-5-nitrobenzaldehyde and benzylamine. Complexes 1-3 were also directly synthesized and their crystal and molecular structures determined by X-ray crystallography. The ligand and its metal complexes were also screened for in vitro antibacterial activity.
SQSTM1/p62 regulates the expression of junctional proteins through epithelial-mesenchymal transition factors
Creators: name: Bertrand, Matthieu
name: Petit, Valérie
name: Jain, Ashish
name: Amsellem, Raymonde
name: Johansen, Terje
name: Larue, Lionel
name: Codogno, Patrice
name: Beau, Isabelle
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Cancer
subject: Developmental Biology
subject: Biological Sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Cell Biology

description: The epithelial to mesenchymal transition (EMT) is an essential process during development and during tumor progression. Here, we observed the accumulation of the selective autophagy receptor and signaling adaptor sequestosome-1 (SQSTM1/p62) during growth factor-induced EMT in immortalized and tumor-derived epithelial cell lines. Modulation of the p62 level regulated the expression of junctional proteins. This effect was dependent on the ubiquitin-associated domain of p62, which stabilized the TGFβ/Smad signaling co-activator Smad4 and the EMT transcription factor Twist. This study highlights a novel function of p62 in a major epithelial phenotypic alteration.
OSSID: Online Self-Supervised Instance Detection by (and for) Pose Estimation
Creators: name: Gu, Qiao
name: Okorn, Brian
name: Held, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Real-time object pose estimation is necessary for many robot manipulation algorithms. However, state-of-the-art methods for object pose estimation are trained for a specific set of objects; these methods thus need to be retrained to estimate the pose of each new object, often requiring tens of GPU-days of training for optimal performance. In this paper, we propose the OSSID framework, leveraging a slow zero-shot pose estimator to self-supervise the training of a fast detection algorithm. This fast detector can then be used to filter the input to the pose estimator, drastically improving its inference speed. We show that this self-supervised training exceeds the performance of existing zero-shot detection methods on two widely used object pose estimation and detection datasets, without requiring any human annotations. Further, we show that the resulting method for pose estimation has a significantly faster inference speed, due to the ability to filter out large parts of the image. Thus, our method for self-supervised online learning of a detector (trained using pseudo-labels from a slow pose estimator) leads to accurate pose estimation at real-time speeds, without requiring human annotations. Supplementary materials and code can be found at https://georgegu1997.github.io/OSSID/
description: 10 pages, 6 figures. RA-L and ICRA 2022
Nation branding: marketing New Zealand via movie set tourism
Creators: name: Mikołajczyk, Alicja
Publisher: name: Zeszyty Naukowe Gdańskiej Szkoły Wyższej
Year: 2017

description: The article discusses the phenomenon of building a country’s brand and changing the perception of a country’s image (rebranding) by applying a strategy relating to film productions located in a given country. New Zealand’s marketing strategy addressed to film fans was built mostly on associations with the works of J.R.R. Tolkien (“The Lord of the Rings”, “The Hobbit”) by creating the image of the country as a mythical land of Middle-earth in the minds of its target audience. The aim of the article is to show how, basing on a unique marketing strategy, a coherent, one-of-a-kind, easily recognizable image of the country can be created.
description: Zeszyty Naukowe Gdańskiej Szkoły Wyższej, Tom 17 (2017)
Relaxation Oscillations of an Exciton-polariton Condensate Driven by Parametric Scattering
Creators: name: Tian, Chuan
name: Chen, Linqi
name: Zhang, Yingjun
name: Zhu, Liqing
name: Hu, Wenping
name: Pan, Yichun
name: Wang, Zheng
name: Zhang, Fangxin
name: Zhang, Long
name: Dong, Hongxing
name: Zhou, Weihang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report observation of coherent oscillations in the relaxation dynamics of an exciton-polariton condensate driven by parametric scattering processes. As a result of the interbranch scattering scheme and the nonlinear polariton-polariton interactions, such parametric scatterings exhibit high scattering efficiency, which leads to fast depletion of the polariton condensate and periodic shut-off of the bosonic stimulation processes, eventually causing relaxation oscillations. Employing polariton-reservoir interactions, the oscillation dynamics in the time domain can be projected onto the energy space. In theory, our simulations using the open-dissipative Gross-Pitaevskii equation are in excellent agreement with experimental observations. Surprisingly, the oscillation patterns are clearly visible in our time-integrated images including many excitation pulses, implying the high stability of the relaxation oscillations driven by polariton parametric scatterings.
Inner-shell excitation in the YbF molecule and its impact on laser cooling
Creators: name: Zhang, Chi
name: Zhang, Chaoqun
name: Cheng, Lan
name: Steimle, Timothy C.
name: Tarbutt, Michael R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The YbF molecule is a sensitive system for measuring the electron's electric dipole moment. The precision of this measurement can be improved by direct laser cooling of the molecules to ultracold temperature. However, low-lying electronic states arising from excitation of a 4f electron may hinder laser cooling. One set of these "4f hole" states lies below the $A^2Π_{1/2}$ excited state used for laser cooling, and radiative decay to these intermediate levels, even with branching ratios as small as $10^{-5}$, can be a hindrance. Other 4f hole states lie very close to the $A^2Π_{1/2}$ state, and a perturbation results in states of mixed character that are involved in the laser cooling cycle. This perturbation may enhance the loss of molecules to states outside of the laser cooling cycle. We model the perturbation of the $A^2Π_{1/2}$ state to determine the strength of the coupling between the states, the de-perturbed potential energy curves, and the radiative branching ratios to various vibrational levels of the ground state, $X ^{2}Σ^+$. We use electronic structure calculations to characterise the 4f hole states and the strengths of transitions between these states and the $A^2Π_{1/2}$ and $X ^{2}Σ^+$ states. We identify a leak out of the cooling cycle with a branching ratio of roughly $5 \times 10^{-4}$, dominated by the contribution of the ground state configuration in a 4f hole state. Finally, we assess the impact of these results for laser cooling of YbF and molecules with similar structure.
description: 11 pages, 3 figures, minor changes from previous version
Decomposing Magnetic Fields in Three Dimensions over the Central Molecular Zone
Creators: name: Hu, Yue
name: Lazarian, A.
name: Wang, Q. Daniel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Measuring magnetic fields in the interstellar medium and obtaining their distribution along line-of-sight is very challenging with the traditional techniques. The Velocity Gradient Technique (VGT), which utilizes anisotropy of magnetohydrodynamic (MHD) turbulence, provides an attractive solution. Targeting the central molecular zone (CMZ), we test this approach by applying the VGT to $\rm ^{12}CO$ and $\rm ^{13}CO$ (J = 1-0) data cubes. We first used the SCOUSEPY algorithm to decompose the CO line emissions into separate velocity components, and then we constructed pseudo-Stokes parameters via the VGT to map the plane-of-the-sky magnetic fields in three-dimension. We present the decomposed magnetic field maps and investigate their significance. While the line-of-sight integrated magnetic field orientation is shown to be consistent with the polarized dust emission from the Planck survey at 353 GHz, individual velocity components may exhibit different magnetic fields. We present a scheme of magnetic field configuration in the CMZ based on the decomposed magnetic fields. In particular, we observe a nearly vertical magnetic field orientation in the dense clump near the Sgr B2 and a change in the outflow regions around the Sgr A*. Two high-velocity structures associated with an expanding ring in the CMZ show distinct swirling magnetic field structures. These results demonstrate the potential power of the VGT to decompose velocity or density-dependent magnetic structures.
description: 18 pages, 12 figures, accepted for publication in MNRAS
Problems of youth and security in the context of the world of change
Creators: name: Lymar, Andrey
Publisher: name: Zeszyty Naukowe Gdańskiej Szkoły Wyższej
Year: 2017

description: The article deals with general problems related to youth life. with the difficulties that exist in defining youth as a social group, and also with the problem of security, which has been studied through the prism of the multiple transformations of the modern world. One of the solutions to the problem may be the phenomenon of safety culture.
description: Zeszyty Naukowe Gdańskiej Szkoły Wyższej, Tom 17 (2017)
Uniformly accelerated Brownian oscillator in (2+1)D: temperature-dependent dissipation and frequency shift
Creators: name: Moustos, Dimitris
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider an Unruh-DeWitt detector modeled as a harmonic oscillator that is coupled to a massless quantum scalar field in the (2+1)-dimensional Minkowski spacetime. We treat the detector as an open quantum system and employ a quantum Langevin equation to describe its time evolution, with the field, which is characterized by a frequency-independent spectral density, acting as a stochastic force. We investigate a point-like detector moving with constant acceleration through the Minkowski vacuum and an inertial one immersed in a thermal reservoir at the Unruh temperature, exploring the implications of the well-known non-equivalence between the two cases on their dynamics. We find that both the accelerated detector's dissipation rate and the shift of its frequency caused by the coupling to the field bath depend on the acceleration temperature. Interestingly enough this is not only in contrast to the case of inertial motion in a heat bath but also to any analogous quantum Brownian motion model in open systems, where dissipation and frequency shifts are not known to exhibit temperature dependencies. Nonetheless, we show that the fluctuating-dissipation theorem still holds for the detector-field system and in the weak-coupling limit an accelerated detector is driven at late times to a thermal equilibrium state at the Unruh temperature.
description: 8 pages, 1 figure, Appendix A was added, Updated to match the published version
Olive oil and its phenolic constituent tyrosol attenuates dioxin-induced toxicity in peripheral blood mononuclear cells via an antioxidant-dependent mechanism
Creators: name: Ilavarasi Kalaiselvan
name: Sheeja Malar Dicson
name: Pandima Devi Kasi
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Cancer
subject: Biological Sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Chemistry
subject: Earth and Environmental Sciences
subject: Physiology
subject: Molecular Biology
subject: Cell Biology
subject: Biochemistry

description: Olive oil (OO) and its phenolic compounds are reported to possess many potential biological effects, which are ascribed to its powerful antioxidant property. In this study, we have assessed whether OO and its phenolic compound tyrosol (TY) could mitigate 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) induced oxidative damages in peripheral blood mononuclear cells (PBMC). The results showed that exposure of PBMC to 10 nM TCDD caused significant cell death and elevated cellular concentrations of reactive oxygen species and lipid peroxidation. Comet assay indicated that OO and TY protected DNA damage against dioxin toxicity. In addition, alterations in levels of antioxidant enzymes were substantially prevented by OO and TY. TCDD-induced CYP1A1 activity and loss of mitochondrial membrane potential were significantly reduced by the administration of OO and TY. The results suggested that dietary modifications incorporating diets rich in OO and associated phenolics could prove beneficial in protecting individuals against toxicity induced by dioxins.
A new selective ‘turn-on’ small fluorescent cationic probe for recognition of RNA in cells
Creators: name: Ahmed, Nisar
name: Shirinfar, Bahareh
name: Miriyala, Vijay Madhav
name: Seong-Kyoon Choi
name: Kyeong-Min Lee
name: Jeon, Won Bae
name: Park, Yu Shin
name: Nam, Hong Gil
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Plant Biology
subject: FOS: Biological sciences
subject: Cancer
subject: Biological Sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Chemistry
subject: Evolutionary Biology
subject: Molecular Biology
subject: Cell Biology
subject: Engineering
subject: Biochemistry
subject: Biophysics

description: Fluorescent imaging probes have revolutionised cell biology by monitoring cellular objects. However, the lack of fluorescent probes with high selectivity for RNA has been a drawback. Thus, selective RNA binding for fluorescent sensors is essential. Here, we report the selective fluorescence enhancement upon addition of RNA. By exploiting a selective recognition of small tetra-cationic probe 1 for RNA, we also explain the possible binding mode for RNA. As a membrane-permeant fluorescence probe, 1 provides selective imaging of RNA not only in human neuroblastoma tumour SH-SY5Y cell line used for Parkinson's disease but also in the unicellular green alga cells. Further exploitation could open new opportunities in neurotoxin and cancer biology.
Parking Spaces Optimisation: In-Depth Study of Mechanism Failure and Assessing In-ter-Component Forces in Double-Stack Motor Controlled Parking System
Creators: name: Awais, Muhammad
name: Qi, Chen
name: LongChang, Zhang
name: Liyuan, Huang
name: Lianjian, Wang
Publisher: name: Zenodo
Year: 2024

description: The Double-Stack Motor Controlled Parking System, recognized for its compact and eco-friendly design, is gaining significant attention. This article focuses on the innovative Double-Stack Parking Mechanism known for optimizing space in residential areas. The renowned parking mechanism has the capability to park two vehicles at the same time. Key aspects investigated, including successful vehicle parking on platforms, Mechanism Failure, and inter-components forces, were investigated to enhance model development. SolidWorks simulation technique is crucial for analyzing forces between components and predicting mechanism failure under various vehicle loads. The study improves vehicle positioning accuracy and platform safety by utilizing force-sensitive resistor sensors, which activate corresponding light-emitting diodes (LEDs) upon vehicle contact. This renowned parking mechanism's ability to withstand different vehicle loads was evaluated, revealing a failure limit of 1600N or above. At 1600N vehicle load, the inter-component forces were analyzed, reflecting the simulation behavior in the parking mechanism. This research lays the foundation for multi-dimensional parking solutions, offering a promising approach to address residential parking space shortages.
Canonical Purification of Evaporating Black Holes
Creators: name: Engelhardt, Netta
name: Folkestad, Åsmund
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that the canonical purification of an evaporating black hole after the Page time consists of a short, connected, Lorentzian wormhole between two asymptotic boundaries, one of which is unitarily related to the radiation. This provides a quantitative and general realization of the predictions of ER=EPR in an evaporating black hole after the Page time; this further gives a standard AdS/CFT calculation of the entropy of the radiation (without modifications of the homology constraint). Before the Page time, the canonical purification consists of two disconnected, semiclassical black holes. From this, we construct two bipartite entangled holographic CFT states, with equal (and large) amount of entanglement, where the semiclassical dual of one has a connected ERB and the other does not. From this example, we speculate that measures of multipartite entanglement may offer a more complete picture into the emergence of spacetime.
description: 43 pages, 12 figures. v2: fixed typos
Critical point particle number fluctuations from molecular dynamics
Creators: name: Kuznietsov, Volodymyr A.
name: Savchuk, Oleh
name: Gorenstein, Mark I.
name: Koch, Volker
name: Vovchenko, Volodymyr
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study fluctuations of particle number in the presence of critical point by utilizing molecular dynamics simulations of the classical Lennard-Jones fluid in a periodic box. The numerical solution of the $N$-body problem naturally incorporates all correlations, exact conservation laws, and finite size effects, allowing us to study the fluctuation signatures of the critical point in a dynamical setup. We find that large fluctuations associated with the critical point are observed when measurements are performed in coordinate subspace, but, in the absence of collective flow and expansion, are essentially washed out when momentum cuts are imposed instead. We put our findings in the context of event-by-event fluctuations in heavy-ion collisions.
description: 16 pages, 9 figures, to be published in Physical Review C
Linking the rates of neutron star binaries and short gamma-ray bursts
Creators: name: Sarin, Nikhil
name: Lasky, Paul D.
name: Vivanco, Francisco H.
name: Stevenson, Simon P.
name: Chattopadhyay, Debatri
name: Smith, Rory
name: Thrane, Eric
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Short gamma-ray bursts are believed to be produced by both binary neutron star (BNS) and neutron star-black hole (NSBH) mergers. We use current estimates for the BNS and NSBH merger rates to calculate the fraction of observable short gamma-ray bursts produced through each channel. This allows us to constrain merger rates of BNS to $\mathcal{R}_{\rm{BNS}}=384^{+431}_{-213}{\rm{Gpc}^{-3} \rm{yr}^{-1}}$ ($90\%$ credible interval), a $16\%$ decrease in the rate uncertainties from the second LIGO--Virgo Gravitational-Wave Transient Catalog, GWTC-2. Assuming a top-hat emission profile with a large Lorentz factor, we constrain the average opening angle of gamma-ray burst jets produced in BNS mergers to $\approx 15^\circ$. We also measure the fraction of BNS and NSBH mergers that produce an observable short gamma-ray burst to be $0.02^{+0.02}_{-0.01}$ and $0.01 \pm 0.01$, respectively and find that $\gtrsim 40\%$ of BNS mergers launch jets (90\% confidence). We forecast constraints for future gravitational-wave detections given different modelling assumptions, including the possibility that BNS and NSBH jets are different. With $24$ BNS and $55$ NSBH observations, expected within six months of the LIGO-Virgo-KAGRA network operating at design sensitivity, it will be possible to constrain the fraction of BNS and NSBH mergers that launch jets with $10\%$ precision. Within a year of observations, we can determine whether the jets launched in NSBH mergers have a different structure than those launched in BNS mergers and rule out whether $\gtrsim 80\%$ of binary neutron star mergers launch jets. We discuss the implications of future constraints on understanding the physics of short gamma-ray bursts and binary evolution.
description: Accepted in Physical Review D: 13 pages, 5 figures
A machine learning algorithm for minute-long Burst searches
Creators: name: Boudart, Vincent
name: Fays, Maxime
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Minute-long Gravitational Wave (GW) transients are events lasting from few to hundreds of seconds. In opposition to compact binary mergers, their GW signals cover a wide range of poorly understood astrophysical phenomena such as accretion disk instabilities and magnetar flares. The lack of accurate and rapidly generated gravitational-wave emission models prevents the use of matched filtering methods. Such events are thus probed through the template-free excess-power method, consisting in searching for a local excess of power in the time-frequency space correlated between detectors. The problem can be viewed as a search for high-value clustered pixels within an image, which has been generally tackled by deep learning algorithms such as Convolutional Neural Networks (CNNs). In this work, we use a CNN as a anomaly detection tool for the long-duration searches. We show that it can reach a pixel-wise detection despite trained with minimal assumptions, while being able to retrieve both astrophysical signals and noise transients originating from instrumental coupling within the detectors. We also note that our neural network can extrapolate and connect partially disjoint signal tracks in the time-frequency plane.
description: 14 pages, 15 figures
Dynamical friction of black holes in ultralight dark matter
Creators: name: Vicente, Rodrigo
name: Cardoso, Vitor
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we derive simple closed-form expressions for the dynamical friction acting on black holes moving through ultralight (scalar field) dark matter, covering both non-relativistic and relativistic black hole speeds. Our derivation is based on long known scattering amplitudes in black hole spacetimes, it includes the effect of black hole spin and can be easily extended to vector and tensor light fields. Our results cover and complement recent numerical and previous non-relativistic treatments of dynamical friction in ultralight dark matter.
description: 11 pages, 2 figures. Version to be published in Physical Review D
Criticality and marginal stability of the shear jamming transition of frictionless soft spheres
Creators: name: Babu, Varghese
name: Sastry, Srikanth
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study numerically the critical behavior and marginal stability of the shear jamming transition for frictionless soft spheres, observed to occur over a finite range of densities, associated with isotropic jamming for densities above the minimum jamming (J-point) density. Several quantities are shown to scale near the shear jamming point in the same way as the isotropic jamming point. We compute the exponents associated with the small force distribution and the interparticle gap distribution,and show that the corresponding exponents are consistent with the marginal stability condition observed for isotropic jamming, and with predictions of the mean field theory of jamming in hard spheres.
description: 6 pages, 2 figures and supplemental material as ancillary file