cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
EXPLORING FACTORS INFLUENCING ANALYTICAL DECISION MAKING AND TRANSFORMATION IN GLOBAL ORGANIZATIONS
Creators: name: Sandhya Kalale Srinivas
Publisher: name: Zenodo
Year: 2025
Subjects: Analytical decision making, analytical transformation, organizationaleffectiveness, sustainable competitive advantage, data driven decision making

description: Organizational transformation journey begins with radical changes in the maneuvering decision-makingprocess. The ability of an organization to analyze data has a significant impact on transformation and decision-making. Global organizations exploreways of achieving superior organizational efficiency to create a competitive edge in the target market. Decision-makers traditionally depended on intuition rather than data-driven analytical decision making. Analytics gives organizations a deeper understanding of critical processes, allowing for transformational changes. Although multinational organizations have been early adopters of analytics, technology-led organizations in emerging economies have slowly embraced analytics. Advanced analytics can enhance an organization's decision-making capabilities, efficiency, and effectiveness. The study extensively reviews relevant literature and identifies critical factors such as managerial behavior, data availability, collection and processing capabilities, data infrastructure and Management, centralization of data, and decision-making capacity. The study has adopted a mixed methodology approach. This research aims to develop an ‘analytical transformation decision-making model’ for global organizations. This research has adopted structured equation modeling to validate the proposed model empirically. The research demonstrates that the ability to collect and analyze data depends on the team’s analytical skills and centralized data analysis structure, which can improve decision-making capabilities and drive analytical transformation.
Extending biodiversity conservation with functional and evolutionary diversity: a case study of South African sparid fishes
Creators: name: R Henriques
name: BQ Mann
name: ES Nielsen
name: C Hui
name: S Von Der Heyden
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology

description: Designing marine protected area (MPA) networks has relied primarily on species- or habitat-based measures that assess spatial distributions of biodiversity. Molecular and functional data have the potential to unlock information regarding the evolutionary uniqueness and resilience of natural communities, making phylogenetic diversity (PD) and functional diversity (FD) effective tools for spatial planning. These are, however, rarely used in marine conservation planning. In South Africa, MPAs have been implemented to protect rare and valuable fishery resources, such as members of the Sparidae (seabreams), but have not considered different dimensions of biodiversity, such as its phylogenetic and functional components. Here, we mapped species distributions, phylogenetic relationships and functional features of the Sparidae in South Africa to refine how biodiversity is spatially structured for this species-rich taxonomic group. Our results show strong spatial similarities between PD and FD, suggesting that, for this group, PD is an effective surrogate for functional data. However, there was a mismatch between areas selected with different biodiversity metrics (particularly endemicity levels) and established MPAs, highlighting the need for integrated approaches to conserve this unique marine fauna.
Experience and learning in beef production: Results from a cluster analysis
Creators: name: Micheels, Eric T.
name: Micheels, Eric T.
Publisher: name: Unknown
Year: 2014
Subjects: subject: Livestock Production/Industries
subject: Cluster Analysis
subject: Experience
subject: Learning orientation
subject: Market orientation
subject: Innovativeness
subject: Performance

description: Research in agriculture and other industries has shown that innovativeness is a key driver of improved performance measures of small and medium-sized enterprises. The willingness to change current practice may be a function of the level of experience of the manager as well as the manager’s commitment to learning. Firms with more experience may suffer from confirmation bias and therefore may not see the performance benefits that stem from innovative activities. Using data from a survey of 285 beef producers in Illinois, this study employs cluster analysis to segment firms along experience and learning variables. Using a non-hierarchical clustering procedure, four clusters emerge. The study employs one-way ANOVA tests to examine differences in market orientation, innovativeness and satisfaction with several performance measures across clusters. Results indicate firms with a commitment to learning have a greater propensity to seek out market information, a greater willingness to accept innovations and are more satisfied with overall performance. The paper concludes with some implications for managers and policy makers.
Spectroscopic study of blue compact galaxies: I. The spectra
Creators: name: Kong, X.
name: Cheng, F. Z.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Blue compact galaxies are compact objects that are dominated by intense star formation. Most of them have dramatically different properties compared to the Milky Way and many other nearby galaxies. Using the IRAS, HI data, and optical spectra, we wanted to measure the current star formation rates, stellar components, metallicities, and star formation histories and evolution of a large blue compact galaxy sample. We anticipate that our study will be useful as a benchmark for studies of emission line galaxies at high redshift. In the first paper of this series, we describe the selection, spectroscopic observation, data reduction and calibration, and spectrophotometric accuracy of a sample of 97 luminous blue compact galaxies. We present a spectrophotometric atlas of rest-frame spectra, as well as tables of the recession velocities and the signal-to-noise ratios. The recession velocities of these galaxies are measured with an accuracy of $δ$V $
description: 18 pages, 4 ps-figures, accepted for publication in Astronomy and Astrophysics
Structuring the problematic situation of smallholder beef farming in Central Java Indonesia: using systems thinking as an entry point to taming complexity
Creators: name: Setianto, N.A.
name: Cameron, D.C.
name: Gaughan, J.B.
name: Setianto, N.A.
name: Cameron, D.C.
name: Gaughan, J.B.
Publisher: name: Unknown
Year: 2014
Subjects: subject: International Development
subject: Livestock Production/Industries
subject: Multi methodologies
subject: System Thinking
subject: Soft System Methodology
subject: CATWOE analysis
subject: Critical System Heuristics

description: Improving smallholders’ performance remains a seemingly intractable central issue for beef farming development in Indonesia. Studying a complex system such as beef farming requires a systemic approach. This paper reports on the combined use of three complementary systems approaches to structure and subsequently model the problem situation as the first research step towards seeking effective solutions. System Dynamics (SD) is considered to be a powerful methodology for taming the complexity of a system. However its problem identification stage has been criticized as being insensitive to the multiple interests and power structures likely to occur in a smallholder system. This study aimed to explore the possibility of combining Soft System Methodology (SSM) and Critical System Heuristics (CSH) to overcome that limitation and accommodate multiple perspectives including smallholder views on system improvements. A series of interviews and workshops involving 2 farmer groups was undertaken in Central Java, Indonesia. The benefits of inclusion of CSH in the research protocol included its ability to embrace the opinions of the less-powerful stakeholders - the farmers. Thus, for the stakeholders, it provides a better understanding of the system than provided by a combination of SD and SSM, and thereby the potential for facilitating development of more effective interventions.
Evidence, Proofs, and Derivations
Creators: name: Aberdein, Andrew
Publisher: name: arXiv
Year: 2019
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics

description: The traditional view of evidence in mathematics is that evidence is just proof and proof is just derivation. There are good reasons for thinking that this view should be rejected: it misrepresents both historical and current mathematical practice. Nonetheless, evidence, proof, and derivation are closely intertwined. This paper seeks to tease these concepts apart. It emphasizes the role of argumentation as a context shared by evidence, proofs, and derivations. The utility of argumentation theory, in general, and argumentation schemes, in particular, as a methodology for the study of mathematical practice is thereby demonstrated. Argumentation schemes represent an almost untapped resource for mathematics education. Notably, they provide a consistent treatment of rigorous and non-rigorous argumentation, thereby working to exhibit the continuity of reasoning in mathematics with reasoning in other areas. Moreover, since argumentation schemes are a comparatively mature methodology, there is a substantial body of existing work to draw upon, including some increasingly sophisticated software tools. Such tools have significant potential for the analysis and evaluation of mathematical argumentation. The first four sections of the paper address the relationships of evidence to proof, proof to derivation, argument to proof, and argument to evidence, respectively. The final section directly addresses some of the educational implications of an argumentation scheme account of mathematical reasoning.
description: Forthcoming in ZDM mathematics education, 51(4), 2019
Additional file 1 of An evaluation of machine learning classifiers for next-generation, continuous-ethogram smart trackers
Creators: name: Yu, Hui
name: Deng, Jian
name: Nathan, Ran
name: Kröschel, Max
name: Pekarsky, Sasha
name: Li, Guozheng
name: Klaassen, Marcel
Publisher: name: figshare
Year: 2021
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: Additional file 1: Supplementary Table 1. Results of parameter tuning of four machine learning methods in five datasets (i.e., for Common crane, Dairy cow, Griffon vulture, Roe deer and Whites stork), with full feature sets and simplified feature sets. Supplementary Table 2. Pseudocodes for feature calculations used for on-board runtime evaluations. Supplementary Algorithm 1. Support vector machine on-board behaviour classification implementation. Supplementary Algorithm 2. Artificial neural network on-board behaviour classification implementation. Supplementary Algorithm 3. Random forest on-board behaviour classification implementation. Supplementary Algorithm 4. Extreme gradient boosting on-board behaviour classification implementation.
Scaeosopha sinevi Ponomarenko et Park 1997
Creators: name: Li, Houhun
name: Zhang, Zhiwei
name: Sinev, Sergey Yu.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Cosmopterigidae
Scaeosopha
Scaeosopha sinevi

description: Scaeosopha sinevi Ponomarenko et Park, 1997
(Figs. 8, 32, 53)
 Scaeosopha sinevi Ponomarenko et Park, 1997: 287; Sinev, 2002: 37.
 Description. Adult (Fig. 8): Wingspan 17.0–19.0 mm.
Male genitalia (Fig. 32). As illustrated.
Female genitalia (Fig. 53): Posterior apophysis about twice as long as anterior apophysis. Sterigma a wide ring with narrow sclerotized edge. Ductus bursae short, same length as anterior apophysis; ductus seminalis arising from near corpus bursae. Corpus bursae large, pear-shaped, same length as posterior apophysis; signa a pair of sclerotized stout teeth with base elongate oval and weakly sclerotized.
 Type material. Holotype ♂, KOREA: Mt. Halla, Cheju, 5.vii.1986, coll. K. T. Park [not examined].
Paratype: 1 ♂, same data as for holotype (CIS, Korea) [not examined].
 Additional material: CHINA: 1 ♂, Mt. Wuyan, Taishun County, Zhejiang Province, 680 m, 2.viii.2005, coll. Yunli Xiao, genitalia slide no. ZZW08051 (NKUM, Tianjin); 1 ♂, Jinxiu County, Guangxi Zhuang Autonomous Region, 600 m, 24.iv.2008, coll. Hui Zhen & Li Zhang (NKUM, Tianjin); 13 ♂, 1 ♀, Yongfu, Guangxi Zhuang Autonomous Region, 160 m, 5–6.v.2008, coll. Li Zhang & Hui Zhen (NKUM, Tianjin); 3 ♂, 6 ♀♀, Sanquan, Nanchuan City, Chongqing, 650 m, 27.vii.1998, bred from Gardenia jasminoides Ellis by Guangfan Yan (NKUM, Tianjin); 23 ♂, 1 ♀, Kadoorie Farm, Hong Kong Special Administrative Region, 210 m, 10.iv.2007, coll. Houhun Li et al. (NKUM, Tianjin).
 Biology. The adults were bred from Gardenia jasminoides Ellis (Rubiaceae) in July in Chongqing, China.
 Distribution. China, Korea.
 Diagnosis. This species is characterized by the relatively short process of the uncus brachium and the short and rectangular valva with the apex blunt (Fig. 32). It is similar to S. percnaula Meyrick in the male genitalia, and the differences between them are given under S. percnaula Meyrick.
 Notes. The female and the hostplant are recorded for the first time.
description: Published as part of Li, Houhun, Zhang, Zhiwei & Sinev, Sergey Yu., 2012, Review of the genus Scaeosopha Meyrick, 1914 (Lepidoptera, Cosmopterigidae, Scaeosophinae) in the world, with descriptions of sixteen new species, pp. 1-34 in Zootaxa 3322 on page 12
Enithares elongata Lansbury 1973
Creators: name: Chen, Ping-ping
name: Nieser, Nico
name: Lansbury, Ivor
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Notonectidae
Enithares
Enithares elongata

description: Enithares elongata Lansbury, 1973
 Enithares elongata Lansbury, 1973: 226.
 Material examined. INDONESIA: IRIAN JAYA: ‘Neth.Ind.- American / New Guinea Exped. / 1938-39. / Hollandia 30.vii 38 / L.J. Toxopeus // [handwritten on backside of label:] bergbeek donkere hoek met veel rottend blad [= mountainous stream, dark edge with a lot of rotting leaves]’, 1 J 2 ♀♀ (1 ♀ teneral) 2 L5 (RMNH).
 Note. This species was only known from its type locality Mt. Nomo south of Bougainville, West New Guinea (LANSBURY 1973). Hollandia was the name of Jayapura during Dutch rule.
description: Published as part of Chen, Ping-ping, Nieser, Nico & Lansbury, Ivor, 2008, Notes on aquatic and semiaquatic bugs (Hemiptera: Heteroptera: Nepomorpha, Gerromorpha) from Malesia with description of three new species, pp. 269-279 in Acta Entomologica Musei Nationalis Pragae 48 (2) on pages 272-273, DOI: 10.5281/zenodo.5340911
The identification of an optical counterpart to the super-Eddington X-ray source, NGC 5204 X-1
Creators: name: Roberts, T. P.
name: Goad, M. R.
name: Ward, M. J.
name: Warwick, R. S.
name: O'Brien, P. T.
name: Lira, P.
name: Hands, A. D. P.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the identification of a possible optical counterpart to the super-Eddington X-ray source NGC 5204 X-1. New Chandra data shows that the X-ray source is point-like, with a luminosity of 5.2 x 10^39 erg/s (0.5 - 8 keV). It displays medium- and long-term X-ray variability in observations spanning a period of 20 years. The accurate Chandra position allows us to identify a blue optical continuum source (m_v = 19.7) at the position of NGC 5204 X-1, using newly-obtained optical data from the INTEGRAL instrument on the William Herschel Telescope. The X-ray and optical source properties are consistent with the scenario in which we are observing the beamed X-ray emission of a high-mass X-ray binary in NGC 5204, composed of an O star with either a black hole or neutron star companion.
description: 5 pages including 4 figures; accepted for publication as a letter in MNRAS
Degenerate elastic networks
Creators: name: Del Nin, Giacomo
name: Pluda, Alessandra
name: Pozzetta, Marco
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 49J45, 35A15 (primary) 49Q10, 53A04

description: We minimize a linear combination of the Willmore and the length functional among networks in $\mathbb{R}^d$ belonging to a given class determined by the number of curves, the order of the junctions and the angles between curves at the junctions. Since this class lacks compactness, we characterize the set of limits of sequences of networks bounded in energy, providing an explicit representation of the relaxed problem. This is expressed in terms of the new notion of degenerate elastic networks that, rather surprisingly, involves only the properties of the given class, without reference to the curvature. In the case of $d=2$ we also give an equivalent description of degenerate elastic networks by means of a combinatorial definition easy to validate by a finite algorithm. Moreover we provide examples, counterexamples, and additional results that motivate our study and show the sharpness of our characterization.
Economic comparison of pasture based dairy calf-to-beef production systems under temperate grassland conditions
Creators: name: Ashfield, A.
name: Wallace, M.
name: Crosson, P.
name: Ashfield, A.
name: Wallace, M.
name: Crosson, P.
Publisher: name: Unknown
Year: 2014
Subjects: subject: Livestock Production/Industries
subject: Bulls
subject: dairy beef
subject: grass based
subject: heifers
subject: simulation
subject: steers

description: With the abolition of EU milk quotas in 2015, the Irish dairy sector is positioning itself for substantial expansion which will result in an increase in calves from the dairy herd available for beef production. A wide range of beef cattle production systems are possible for these extra calves reflecting differences in breed, gender and finishing age. The Grange Dairy Beef Systems Model was used to simulate beef production from male and female calves born to Holstein-Friesian dairy cows bred to late maturing, early maturing and Holstein-Friesian sires and finished at different ages. The most profitable system was finishing steers at 28 months of age with the least profitable system being finishing male animals as bulls at 16 months of age. All systems were sensitive to beef, calf and concentrate price variations. The main implications from this study are that, irrespective of the system, maximising the proportion of grazed grass in the diet and the percentage of live weight gain from grass while also maintaining a high carcass output per hectare are the main drivers of profitability. Other issues such as land and labour charges, bonus schemes and variations in beef, calf and concentrate prices are important and can differ considerably depending on farm circumstances. Therefore, these issues need to be considered when deciding between different dairy calf-to-beef systems.
Acidostoma australis Stoddart & Lowry 2012, sp. nov.
Creators: name: Stoddart, H. E.
name: Lowry, J. K.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Acidostomatidae
Acidostoma
Acidostoma australis

description: Acidostoma australis sp. nov.
(Figs 1–4)
 Type material. HOLOTYPE, sex not known, probably female, 5 mm, AM P.25478, east of Port Kembla, New South Wales, Australia, 34°26–27'S 151°27'E, 1200 m, Globigerina ooze, dredged, 13 December 1976, J.K. Lowry, FRV Kapala stn K76-23-02.
 1. Dahl wrote that “to study the structure and contents of the alimentary canal one specimen of A. laticorne was sectioned serially” and “the proctodaeum was filled with a tangle of tubular objects, many of which contained a spiral thread-like structure. Obviously these objects are nematocysts, most probably of Anthozoan origin.” Ansell (1969) and Vader (1967; 1984) have cited these statements as evidence for the association of A. laticorne with sea anemones. However, Dahl’s next sentence stated that “In conjunction with the observations published by Della Valle this seems to indicate that A. neglectum is an ectoparasite of Anthozoans.” It seems that his earlier use of the name A. laticorne was a mistake, the intended species being A. neglectum. This is supported by Dahl’s next two sentences, where he says that the mouthparts of A. obesum and A. nodiferum are similar, but those of A. laticorne are less specialized; and that “no new data are available concerning the food of any one of the three species”- presumably the three species just mentioned, A. obesum, A. nodiferum and A. laticorne. It is also unlikely that, given there is so little material of A. laticorne available, any specimen would be sacrificed for serial sectioning.
  Diagnostic description. Mandible molar a small, weakly setose triangular flap . Maxilla 1 palp small, 1- articulate, with apical robust setae. Maxilliped inner plate well developed; outer plate with subapical notch. Gnathopod 2 dactylus reaching corner of palm. Pereopods 5 and 6 merus broader than long.  Epimeron 3 posteroventral corner produced, subacute . Uropod 1 peduncle dorsolateral margin with less than 10 robust setae. Uropod 2 peduncle dorsolateral margin not castellate, with very short setae. Uropod 3 reaching to about the end of uropod 2; rami longer than peduncle, without plumose setae; outer ramus article 2 well developed. Telson about as long as broad, deeply cleft (about 80%).
 Etymology. Named for Australia, the geographic area of the type locality.
 Distribution. South-eastern Australia, Tasman Sea; 1200 m depth.
description: Published as part of Stoddart, H. E. & Lowry, J. K., 2012, Revision of the lysianassoid genera Acidostoma and Shackletonia (Crustacea: Amphipoda: Acidostomatidae fam. nov.), pp. 1-34 in Zootaxa 3307 (1) on pages 5-8, DOI: 10.11646/zootaxa.3307.1.1, http://zenodo.org/record/5250488
Spin-Orbit induced semiconductor spin guides
Creators: name: Valin-Rodriguez, Manuel
name: Puente, Antonio
name: Serra, Llorens
Publisher: name: arXiv
Year: 2002
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The tunability of the Rashba spin-orbit coupling allows to build semiconductor heterostructures with space modulated coupling intensities. We show that a wire-shaped spin-orbit modulation in a quantum well can support propagating electronic states inside the wire only for a certain spin orientation and, therefore, it acts as an effective spin transmission guide for this particular spin orientation.
description: 4 pages, 4 figures. e-mail contact: vdfsmvr4@clust.uib.es, to appear in Nanotechnology (2003)
Development of a scalable parallel computing SPH framework for large-scale geotechnical applications
Creators: name: EDWARD YANG
Publisher: name: Monash University
Year: 2021
Subjects: subject: 90501 Civil Geotechnical Engineering
subject: FOS: Civil engineering

description: This thesis contributes to recent advances in parallel computing for geo-materials using SPH as well as limited study of large-scale geotechnical applications with advanced constitutive models. The SPH method is described, as well as general frameworks for implementation of soil material models. The parallel framework is described in detail and tested, achieving over 90% efficiency for strong and weak scaling tests up to 1,024 cores. The code is applied to study three applications requiring large-scale or high resolution: the axisymmetric granular column collapse, obstruction of granular flows using baffles, and a piled embankment model experiment.
Additional file 4 of Cytochrome P450 1A1 enhances inflammatory responses and impedes phagocytosis of bacteria in macrophages during sepsis
Creators: name: Tian, Li-Xing
name: Tang, Xin
name: Zhu, Jun-Yu
name: Luo, Li
name: Ma, Xiao-Yuan
name: Cheng, Shao-Wen
name: Zhang, Wei
name: Tang, Wan-Qi
name: Ma, Wei
name: Yang, Xue
name: Lv, Chuan-Zhu
name: Liang, Hua-Ping
Publisher: name: figshare
Year: 2020
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 3: Table S2.
Ερμηνευτική προσέγγιση και δικονομικά ζητήματα του αδικήματος της δωροδοκίας – δωροληψίας για την αλλοίωση αποτελέσματος αγώνα (άρθρο 132 του νόμου 2725/1999)
Creators: name: Βαλαχής, Ιωάννης Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2024
Subjects: Χειραγώγηση αγώνα
Οικονομικά εγκλήματα στον αθλητισμό
Αθλητικά Εγκλήματα
Manipulation of a sport event
Financial crimes in sports
Athletic crimes

description: Στις μέρες μας, το νοσηρό φαινόμενο της χειραγώγησης του αποτελέσματος αθλητικών αγώνων αποτελεί ένα πολύ κρίσιμο ζήτημα που λυμαίνει τον αθλητισμό σε εθνικό, αλλά και σε διεθνές επίπεδο. Το άρθρο 132 του νόμου 2725/1999, συνιστά το κυριότερο νομοθέτημα της ελληνικής έννομης τάξης για την ποινική αντιμετώπιση του εγκλήματος της δωροδοκίας – δωροληψίας για την αλλοίωση αποτελέσματος αγώνα. Με την παρούσα Διπλωματική επιχειρείται μια ενδελεχής έρευνα και ανάλυση των ειδικότερων ρυθμίσεων που προβλέπονται στο άρθρο αυτό, σε επίπεδο ουσιαστικού και δικονομικού ποινικού δικαίου, καθώς και η παρουσίαση των ζητημάτων που ανακύπτουν από την ερμηνεία και την εφαρμογή τους.
description: Nowadays, the manipulation of sports competition results is a significant issue affecting sports both nationally and internationally, undermining the integrity and fairness of athletic events. In Greece, article 132 of law 2725/1999 is the primary legislative framework for the criminal prosecution of bribery and acceptance of bribes intended to alter game results. This provision is central to the Greek legal system's efforts to combat this crime. This thesis aims to provide a comprehensive investigation and analysis of the specific regulations outlined in this article, focusing on both substantive and procedural aspects of criminal law. Additionally, it seeks to address the issues that arise from the interpretation and application of these regulations.
description: Επισπεύδον Τμήμα: Τμήμα Νομικής ΑΠΘ, Συμμετέχει: το Τμήμα Νομικής ΔΠΘ
Intrinsic spectra and energetics of BeppoSAX Gamma-Ray Bursts with known redshifts
Creators: name: Amati, L.
name: Frontera, F.
name: Tavani, M.
name: Zand, J. J. M. in 't
name: Antonelli, A.
name: Costa, E.
name: Feroci, M.
name: Guidorzi, C.
name: Heise, J.
name: Masetti, N.
name: Montanari, E.
name: Nicastro, L.
name: Palazzi, E.
name: Pian, E.
name: Piro, L.
name: Soffitta, P.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the main results of a study of spectral and energetics properties of twelve gamma-ray bursts (GRBs) with redshift estimates. All GRBs in our sample were detected by BeppoSAX in a broad energy range (2-700 keV). From the redshift estimates and the good-quality BeppoSAX time-integrated spectra we deduce the main properties of GRBs in their cosmological rest frames. All spectra in our sample are satisfactorily represented by the Band model with no significant soft X-ray excesses or spectral absorptions. We find a positive correlation between the estimated total (isotropic) energies in the 1-10000 keV energy range (E_rad) and redshifts z. Interestingly, more luminous GRBs are characterized also by larger peak energies E_p of their EF(E) spectra. Furthermore, more distant GRBs appear to be systematically harder in the X-ray band compared to GRBs with lower redshifts. We discuss how selection and data truncation effects could bias our results and give possible explanations for the correlations that we found.
description: 10 pages, 5 figures, accepted for publication in Astronomy & Astrophysics
MOESM3 of Association of time-to-treatment with outcomes of Pneumocystis pneumonia with respiratory failure in HIV-negative patients
Creators: name: Ryoung-Eun Ko
name: Na, Soo
name: Kyungmin Huh
name: Suh, Gee
name: Kyeongman Jeon
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Pharmacology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 3. Table S3. Comparison of diagnosis and treatment of PCP and clinical outcomes according to initiation time of anti-PCP treatment.
AGRICULTURE, INCLUSIVE GROWTH AND NATIONAL STABILITY:
Creators: name: Adelaja, Adesoji O.
name: Adelaja, Adesoji O.
Publisher: name: Unknown
Year: 2016
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: International Development
subject: Agriculture
subject: Attacks
subject: Food Security
subject: National Security
subject: Terrorism
subject: Insurgency
subject: Inclusive Growth
subject: Root Causes
subject: Boko Haram
subject: Nigeria.

description: Several studies have examined the causes and consequences of major national security threats, especially terrorism, which has become a key global challenge. Others have explored the place targeting behavior of terrorist groups. While food security is widely accepted as an important element of national security, few studies, if any, have explored the nexus between both. Using Nigeria’s Boko Haram insurgency as a case study, this study explores three dimensions of the food-national security nexus: (1) food insecurity as a root cause of terrorism; (2) the socio-economic consequences/impacts of terrorism on agriculture and food security; and (3) why and how terrorists target agriculture and food security. To explain the vulnerability of food security to terrorism, the study further develops a theoretical model of terrorist motivation and place-targeting behavior, as well as several related hypotheses about their goals of causing food insecurity and enhancing their own food production and supply capacities. The application of this model to data from the Boko Haram insurgency yielded empirical evidence to support a number of hypotheses, including the greater vulnerability of specific agricultural and food production places to terrorist attacks and fatalities due to the commodities they produce. The paper concludes by recommending that the nexus between food security and national security should be more aptly investigated.
Are South African linefishes recovering and what makes them prone to overexploitation?
Creators: name: M Haupt
name: H Winker
name: D Parker
name: SE Kerwath
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Managing coastal fisheries is challenging as the status of many fish stocks caught in these fisheries remains unknown. In the South African linefishery, regular comprehensive assessments of the status of most linefish stocks are unattainable owing to a scarcity of reliable long-term data. Length-based analysis remains the only option to determine stock status in the form of spawning potential ratio (SPR), as life-history information and representative length samples are available for many linefish species. Although per-recruit models are susceptible to bias due to violation of the steady-state assumption, the SPR has been shown to be robust for long-lived species under reasonably consistent fishing mortality. In this study we used observer-collected length-frequency data from two time-periods 20 years apart (1988–1990 and 2008–2010), before and after management regulations were implemented, in combination with life-history information, to estimate the SPRs for 17 linefish species. We then correlated the recent stock-status estimates to species-specific life-history traits to identify length-based indicators of susceptibility to exploitation. Most species showed improvements in SPR between the periods, caused mainly by decreases in fishing mortality (F) and also increases in length-at-first-capture (Lc). The ratio between Lc and asymptotic length (Lc/L∞), and the ratio between Lc and optimum length (Lc/Lopt), had significant relationships with SPR. We suggest that length-based indicators could be used to classify risk to overfishing in data-poor fisheries for medium- to long-lived species when time-series data are not attainable, but where representative size samples and adequate life-history information exist.
MOESM2 of Association of time-to-treatment with outcomes of Pneumocystis pneumonia with respiratory failure in HIV-negative patients
Creators: name: Ryoung-Eun Ko
name: Na, Soo
name: Kyungmin Huh
name: Suh, Gee
name: Kyeongman Jeon
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2. Table S2. Comparison of baseline patient characteristics according to initiation time of anti-PCP treatment.
Enithares lombokensis Lansbury 1968
Creators: name: Chen, Ping-ping
name: Nieser, Nico
name: Lansbury, Ivor
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Notonectidae
Enithares
Enithares lombokensis

description: Enithares lombokensis Lansbury, 1968
 Enithares lombokensis Lansbury, 1968: 416-418.
 Enithares lombokensis: NIESER & CHEN (1992): 34 -35.
 Material examined. INDONESIA: NUSA TENGGARA: LOMBOK: ‘ N Lombok / Mt Rinjani: Senaru / waterfall alt. m 0470 / 21.x.1991 / Krikken, Huijbregts, de Vries // multistr evergr forest / (remnant) / rivulets from waterfall’, 1 ♀ (RMNH). ‘Flores, Desa Detubawa / 10 km NE of Ende along Maumere road / alt.ca. 100m, 12.04.1986 / A.L. van Berge Henegouwen / S. Pariwono // hilly area with monsoon forest / pools in dry river bed’, 1 J (NCTN); FLORES: ‘Flores, Wolotolo 20 km / NE of Ende along Maumere / road, 450m 12.04.1986 A.L. van / Berge Henegouwen, S. Pariwono // cultivated area, irrigation / system in sawah, surrounded by / pieces of monsoon forest, from / small brook’ 1 ♀ (NCTN).
 Note. This species is known from Lombok and Flores but has as yet not been found on the islands in between.
description: Published as part of Chen, Ping-ping, Nieser, Nico & Lansbury, Ivor, 2008, Notes on aquatic and semiaquatic bugs (Hemiptera: Heteroptera: Nepomorpha, Gerromorpha) from Malesia with description of three new species, pp. 269-279 in Acta Entomologica Musei Nationalis Pragae 48 (2) on page 273, DOI: 10.5281/zenodo.5340911
An XMM-Newton observation of the luminous Seyfert 1 galaxy Markarian 509
Creators: name: Pounds, Ken
name: Reeves, James
name: O'Brien, Paul
name: Page, Kim
name: Turner, Martin
name: Nayakshin, Sergei
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the spectral analysis of an early XMM-Newton observation of the luminous Seyfert 1 galaxy Markarian 509. We find the hard (2-10 keV) continuum slope, including reflection, to be somewhat flatter ($Γ=1.75$) than for a typical BLS1. The most obvious feature in the hard X-ray spectrum is a narrow emission line near 6.4 keV, with an equivalent width of 50 eV. The energy and strength of this line is consistent with fluorescence from `neutral' iron in the molecular torus, and we note the emerging ubiquity of this feature in XMM-Newton and Chandra observations of Seyfert 1 galaxies over a wide luminosity range. We also find evidence for a second emission line at 6.7-6.9 keV, which we attempt to model by reflection from a highly ionised disc. A `soft excess', evident as an upward curvature in the continuum flux below 1.5 keV, cannot be explained solely by enhanced reflection from the ionised disc. The RGS spectrum shows only weak discrete emission and absorption features in the soft X-ray spectrum, supporting our conclusion that the soft excess emission in Mkn 509 represents the high energy portion of optically thick, thermal emission from the inner accretion disc.
description: 16 pages, including postscript figures. Accepted for Publication in ApJ
MOESM2 of Phasin PhaP1 is involved in polyhydroxybutyrate granules morphology and in controlling early biopolymer accumulation in Azospirillum brasilense Sp7
Creators: name: Martínez-Martínez, María
name: González-Pedrajo, Bertha
name: Dreyfus, Georges
name: Soto-Urzúa, Lucía
name: Martínez-Morales, Luis
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2. Identity and similarity percentages between the entire amino acids sequences of phasins from PHB-producing microorganisms.
The CKM unitarity problem: A trace of new physics at the TeV scale?
Creators: name: Belfatto, Benedetta
name: Beradze, Revaz
name: Berezhiani, Zurab
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: After the recent high precision determinations of $V_{us}$ and $V_{ud}$, the first row of the CKM matrix shows more than $4σ$ deviation from unitarity. Two possible scenarios beyond the Standard Model can be investigated in order to fill the gap. If a 4th quark $b'$ participates in the mixing, with $\vert V_{ub'} \vert \sim0.04$, then its mass should be no more than 6 TeV or so. A different solution can come from the introduction of the gauge horizontal family symmetry acting between the lepton families and spontaneously broken at the scale of about 6 TeV. Since the gauge bosons of this symmetry contribute to muon decay in positive interference with Standard Model, the Fermi constant is slightly smaller than the muon decay constant so that unitarity is recovered. Also the neutron lifetime problem, that is about $4σ$ discrepancy between the neutron lifetimes measured in beam and trap experiments, is discussed in the light of the these determinations of the CKM matrix elements.
description: 11 pages, 10 figures
title: ÐÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ°Ð¼Ð¾Ð¾ÑÐ³Ð°Ð½Ð¸Ð·ÑÑÑÐ¸Ñ ÑÑ ÐºÐ°ÑÑ ÐÐ¾Ñ Ð¾Ð½ÐµÐ½Ð° Ð´Ð»Ñ Ð¼ÐµÑÑÐ¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð½Ð¾Ð¹ ÐºÐ»Ð°ÑÑÐµÑÐ¸Ð·Ð°ÑÐ¸Ð¸ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð² Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ð¹
title: Using self-organizing maps for metrologically reasonable clustering of measurement results
Creators: name: ÐÐ¾Ð»ÑÑÐ¸ÐºÐ¾Ð², ÐÐ¸ÑÐ°Ð»Ð¸Ð¹
name: "Ð¡Ð¸ÑÑÐµÐ¼Ð½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· Ð² Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ð¸ Ð¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ð¸", Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½Ð°Ñ Ð½Ð°ÑÑÐ½Ð¾-Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ°Ñ ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ñ (27; 2023; Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³)
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2024
Subjects: ÐÑÐºÑÑÑÑÐ²ÐµÐ½Ð½ÑÐ¹ Ð¸Ð½ÑÐµÐ»Ð»ÐµÐºÑ
Ð Ð°ÑÐ¿Ð¾Ð·Ð½Ð°Ð²Ð°Ð½Ð¸Ðµ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²
ÐºÐ»Ð°ÑÑÐµÑÐ¸Ð·Ð°ÑÐ¸Ñ
Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ° Ð½ÐµÑÐ¾ÑÐ½ÑÑ Ð´Ð°Ð½Ð½ÑÑ
Ð¼ÐµÑÑÐ¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð½Ð°Ñ ÐºÐ»Ð°ÑÑÐµÑÐ¸Ð·Ð°ÑÐ¸Ñ
ÑÐ°Ð¼Ð¾Ð¾ÑÐ³Ð°Ð½Ð¸Ð·ÑÑÑÐ¸ÐµÑÑ ÐºÐ°ÑÑÑ ÐÐ¾Ñ Ð¾Ð½ÐµÐ½Ð°
clustering
processing of inaccurate data
metrologically reasonable clustering
Kohonen self-organizing maps

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼ Ð¼ÐµÑÑÐ¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð½Ð¾Ð¹ ÐºÐ»Ð°ÑÑÐµÑÐ¸Ð·Ð°ÑÐ¸Ð¸ Ð½ÐµÑÐ¾ÑÐ½ÑÑ Ð´Ð°Ð½Ð½ÑÑ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ ÑÐ°Ð¼Ð¾Ð¾ÑÐ³Ð°Ð½Ð¸Ð·ÑÑÑÐ¸ÑÑÑ ÐºÐ°ÑÑ ÐÐ¾ÑÐ¾Ð½ÐµÐ½Ð°. ÐÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ñ ÑÐ¸ÑÐ»ÐµÐ½Ð½ÑÐµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ, Ð¿Ð¾ÐºÐ°Ð·Ð°Ð²ÑÐ¸Ðµ ÑÑÑÐ¾Ð¹ÑÐ¸Ð²Ð¾ÑÑÑ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð² Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¼ÐµÑÐ¾Ð´Ð° Ð¿ÑÐ¸ ÐºÐ¾Ð¼Ð±Ð¸Ð½Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ð¸ ÐµÐ³Ð¾ Ñ ÐºÐ»Ð°ÑÑÐ¸ÑÐµÑÐºÐ¸Ð¼Ð¸ Ð¼ÐµÑÐ¾Ð´Ð°Ð¼Ð¸ ÐºÐ»Ð°ÑÑÐµÑÐ¸Ð·Ð°ÑÐ¸Ð¸.
description: This paper proposes an algorithm for metrologically reasonable clustering
of inaccurate data based on self-organizing maps. Numerical studies have been carried out
to show the stability of the results of the presented method when combined with classical
clustering methods.
Integrability and Renormalization under $T \bar T$
Creators: name: Rosenhaus, Vladimir
name: Smolkin, Michael
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Smirnov and Zamolodchikov recently introduced a new class of two-dimensional quantum field theories, defined through a differential change of any existing theory by the determinant of the energy-momentum tensor. From this $T\bar T$ flow equation one can find a simple expression for both the energy spectrum and the $S$-matrix of the $T\bar T$ deformed theories. Our goal is to find the renormalized Lagrangian of the $T\bar T$ deformed theories. In the context of the $T\bar T$ deformation of an integrable theory, the deformed theory is also integrable and, correspondingly, the $S$-matrix factorizes into two-to-two $S$-matrices. One may thus hope to be able to extract the renormalized Lagrangian from the $S$-matrix. We do this explicitly for the $T\bar T$ deformation of a free massive scalar, to second order in the deformation parameter. Once one has the renormalized Lagrangian one can, in principle, compute all other observables, such as correlation functions. We briefly discuss this, as well as the relation between the renormalized Lagrangian, the $T\bar T$ flow equation, and the $S$-matrix. We also mention a more general class of integrability-preserving deformations of a free scalar field theory.
description: 38 pages, 6 figures; v2, typos fixed
MOESM1 of Association of time-to-treatment with outcomes of Pneumocystis pneumonia with respiratory failure in HIV-negative patients
Creators: name: Ryoung-Eun Ko
name: Na, Soo
name: Kyungmin Huh
name: Suh, Gee
name: Kyeongman Jeon
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Table S1. Comparison of baseline characteristics of 51 patients according to the quartiles of time to anti-PCP treatment.
Acidostoma molarifera Margulis 1963
Creators: name: Stoddart, H. E.
name: Lowry, J. K.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Acidostomatidae
Acidostoma
Acidostoma molarifera

description: Acidostoma molarifera Margulis, 1963
 Acidostoma molarifera Margulis, 1963: 165, figs 1, 2. ― Barnard & Karaman, 1991: 457.
  Diagnostic description. Mandible molar a small, weakly-setose triangular flap .  Maxilla 1 palp small , 1- articulate, without apical setae. Maxilliped inner plate well developed; [outer plate, subapical notch unknown]. Gnathopod 2 dactylus reaching corner of palm. Pereopods 5 and 6 merus broader than long. Epimeron 3 posteroventral corner produced into a spine.  Uropod 1 peduncle dorsolateral margin with more than 10 robust setae . Uropod 2 peduncle dorsolateral margin not castellate, with very short setae. Uropod 3 reaching to about the end of the peduncle of uropod 2; rami shorter than peduncle, without plumose setae; outer ramus article 2 small. Telson broader than long, moderately cleft (about 66%).
 Remarks. Acidostoma molarifera and A. pectinata, both from the Sea of Okhotsk, share a small palp on maxilla 1, a large spine on the posteroventral corner of epimeron 3 and more than 10 robust setae on the peduncle of uropod 1. They differ in the mandibular molar (a weakly-setose triangular flap in A. molarifera, absent in A. pectinata); the maxilla 1 palp (apical setae absent in A. molarifera, present in A. pectinata) and the uropod 2 peduncle (dorsolateral margin smooth in A. molarifera and crenulate in A. pectinata).
 Distribution. Sea of Okhotsk, western North Pacific Ocean; 105 m depth.
description: Published as part of Stoddart, H. E. & Lowry, J. K., 2012, Revision of the lysianassoid genera Acidostoma and Shackletonia (Crustacea: Amphipoda: Acidostomatidae fam. nov.), pp. 1-34 in Zootaxa 3307 (1) on page 15, DOI: 10.11646/zootaxa.3307.1.1, http://zenodo.org/record/5250488
Impact of Media and Marketing on Sustainable Development of Traditional Craft Villages in Vietnam
Creators: name: Thi Diep Uyen Doan
Publisher: name: Zenodo
Year: 2024

description: The goal of the paper is to analyze the media and marketing practices in traditional craft villages.This assessment aims to examine the extend of influence of these practices on the sustainability of traditional craft villages. From there, analyses and recommendations are made to preserve traditional crafts.Keywords: media, marketing, sustainable development, traditional craft villages, Vietnam
MOESM3 of Phasin PhaP1 is involved in polyhydroxybutyrate granules morphology and in controlling early biopolymer accumulation in Azospirillum brasilense Sp7
Creators: name: Martínez-Martínez, María
name: González-Pedrajo, Bertha
name: Dreyfus, Georges
name: Soto-Urzúa, Lucía
name: Martínez-Morales, Luis
Publisher: name: figshare
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Ecology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Computational Biology

description: Additional file 3. Ramachandran plots of predicted three-dimensional structures of putative A. brasilense Sp7 phasins.
Theory for shift current of bosons: Photogalvanic spin current in ferrimagnetic and antiferromagnetic insulators
Creators: name: Ishizuka, Hiroaki
name: Sato, Masahiro
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically study the optical generation of dc spin current (i.e., a spin-current solar cell) in ordered antiferromagnetic and ferrimagnetic insulators, motivated by a recent study on the laser-driven spinon spin current in noncentrosymmetric quantum spin chains [H. Ishizuka and M. Sato, Phys. Rev. Lett. 122, 197702 (2019)]. Using a non-linear response theory for magnons, we analyze the dc spin current generated by a linearly-polarized electromagnetic wave (typically, terahertz or gigahertz waves). Considering noncentrosymmetric two-sublattice magnets as an example, we find a finite dc spin current conductivity at $T=0$, where no thermally-excited magnons exist; this is in contrast to the case of the spinon spin current, in which the optical transition of the Fermi degenerate spinons plays an essential role. We find that the dc spin-current conductivity is insensitive to the Gilbert damping, i.e., it may be viewed as a shift current carried by bosonic particles (magnons). Our estimate shows that an electric-field intensity of $E\sim10^4-10^6$ V/cm is sufficient for an observable spin current. Our theory indicates that the linearly-polarized electromagnetic wave generally produces a dc spin current in noncentrosymmetric magnetic insulators.
description: 13 pages, 4 figures