cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Climate-Induced Disasters: Preparedness and Adaptation Strategies
Creators: name: Mst. Farhana Yeasmin
Publisher: name: Zenodo
Year: 2024

description: Climate change has become a critical global issue, significantly affecting population health, poverty, and development. Climate-induced disasters (CINDs), such as floods, droughts, and cyclones, exacerbate existing vulnerabilities, particularly in disadvantaged communities. The objective of this study was to conduct a thorough review of climate induced disaster through an analysis of existing literature. The literature was analyzed to identify techniques, challenges, and potential future directions in climate induced disaster. Data was gathered from research papers, reports, and case studies. The rising frequency and intensity of extreme weather events, driven by hydrological, meteorological, and climatological changes, challenge the resilience of cities and regions worldwide. This paper explores the impacts of climate change on ecosystems, human health, and economies, with a focus on Bangladesh and other vulnerable regions like Southern Africa and Sub-Saharan Africa. It delves into the preparedness and adaptation strategies employed by governments and organizations, highlighting flood mitigation, climate change adaptation, and disaster risk reduction (DRR) initiatives. Barriers to effective disaster management, such as resource limitations, complex stakeholder coordination, and policy gaps, are also discussed. The future of disaster management is likely to focus on innovative solutions involving predictive technologies, climate-resilient infrastructure, and collaborative, community-based approaches to enhance resilience against climate-induced disasters.
Quantum rearrangement and self-consistent BCS-BEC crossover thermodynamics
Creators: name: Chen, Ji-sheng
name: Cheng, Chuan-ming
name: Li, Jia-rong
name: Wang, Yan-ping
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Based on previous works, analytical calculational procedures for dealing with the strongly interacting fermions ground state are further developed through a medium dependent potential in terms of the Bethe-Peierls contact interaction model. The methods are exact in the unitary limit regime and they lead to the self-consistent equations analogous to the Hartree ones. The single particle energy spectrum rearrangement effects on the thermodynamics due to the Hugenholtz-van Hove theorem constraint are addressed. These effects lead to an additional instantaneous correlation potential contribution to the system physical chemical potential and pressure, i.e., equation of state, which enforces the classical thermodynamic consistency. The Dyson-Schwinger equations represent implicitly the various Bethe-Goldstone expansion ones. In a thermodynamically self-consistent way, the universal dimensionless factor is analytically calculated to be $ξ=\049$, which defines the ratio of the unitary fermions energy density to that of the ideal non-interacting ones at T=0.
description: published version revised according to comments; a few typos fixed and references updated
Aspects of $(d+D)$-dimensional Anisotropic Conformal Gravity
Creators: name: Oh, Jae-Hyuk
name: Oh, Phillial
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss various aspects of anisotropic gravity in $(d+D)$-dimensional spacetime where $D$ dimensions are treated as extra dimensions. It is based on the foliation preserving diffeomorphism invariance and anisotropic conformal invariance. The anisotropy is embodied by introducing a factor $z$ which discriminates the scaling degree of the extra $D$ dimensions against the $d$-dimensional base spacetime and Weyl scalar field which mediates the anisotropic scaling symmetry. There is no intrinsic scale but a physical scale $M_*$ emerges as a consequence of spontaneous conformal symmetry breaking. Some vacuum solutions are obtained and we discuss an issue of `size separation' between the base spacetime and the extra dimensions. The size separation means large hierarchy between the scales appearing in the base spacetime and the extra dimensions respectively. We also discuss interesting theories obtained from our model. In the case of (4,1), we propose a resolution of hierarchy problem and discuss comparison with the results of the brane-world model. In a $(d,D)=(2,2)$ case, we suggest a UV-complete unitary quantum gravity which might become Einstein gravity in IR. In a certain (2,1) case, we obtain CGHS-model.
description: 23+1 pages, a new section is added, a few typos are corrected. Several references are added
Higgs $p_T$ Spectrum and Total Cross Section with Fiducial Cuts at Third Resummed and Fixed Order in QCD
Creators: name: Billis, Georgios
name: Dehnadi, Bahman
name: Ebert, Markus A.
name: Michel, Johannes K. L.
name: Tackmann, Frank J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present predictions for the gluon-fusion Higgs $p_T$ spectrum at third resummed and fixed order (N$^3$LL$'+$N$^3$LO) including fiducial cuts as required by experimental measurements at the Large Hadron Collider. Integrating the spectrum, we predict for the first time the total fiducial cross section to third order (N$^3$LO) and improved by resummation. The N$^3$LO correction is enhanced by cut-induced logarithmic effects and is not reproduced by the inclusive N$^3$LO correction times a lower-order acceptance. These are the highest-order predictions of their kind achieved so far at a hadron collider.
description: 5 pages, 3 figures; v2: journal version (adjusted title, more details on nonsingular fit, note added)
Ανάπτυξη και μελέτη σύνθετων υλικών πολυ(ηλεκτρικού βουτυλενεστέρα) με ίνες και μικροτεμαχίδια κάνναβης
Creators: name: Τερζοπούλου, Ζωή Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Πολυ(ηλεκτρικός βουτυλενεστέρας)
Σύνθετα υλικά
Κάνναβη
Poly(butylene succinate)
Composite materials
Hemp

description: Ο σκοπός αυτής της εργασίας είναι η παρασκευή και η μελέτη πλήρως βιοαποικοδομήσιμων («πράσινων») σύνθετων υλικών, με τη χρήση πολυ(ηλεκτρικού βουτυλενεστέρα) ως πολυμερική μήτρα και ίνες καθώς και μικροτεμαχίδια κάνναβης ως πληρωτικά υλικά. Τα υλικά παρασκευάστηκαν με την τεχνική της ανάμιξης τήγματος, με τη βοήθεια διπλοκόχλιου εκβολέα, και ακολούθησε πλήρης φυσικοχημικός χαρακτηρισμός τους. Ακολούθησε ο πλήρης φυσικοχημικός χαρακτηρισμός των σύνθετων υλικών με χρήση φασματοσκοπίας FT-IR, XRD και DSC. Μελετηθήκαν οι μηχανικές ιδιότητες με μέτρηση της αντοχής στον εφελκυσμό και της αντοχής στην κρούση καθώς και ο ρυθμός βιοαποικοδόμησης τους με ενζυμική υδρόλυση και αποικοδόμηση στο έδαφος. Επίσης μελετήθηκε η διασπορά και η πρόσφυση με ηλεκτρονικό μικροσκόπιο σάρωσης (SEM).
description: The aim of the present thesis was the development and study of fully biodegradable (green) composite materials, based on poly(butylene succinate) as the polymeric matrix with hemp fibers and shives as fillers. The materials were prepared by melt mixing procedure, using a twin-screw extruder, followed by full phusicochemical characterization. The physicochemical characterization of the composite materials included spectrometry FT-IR, XRD and DSC. Mechanical properties were studied with measuring tensile strength and impact strength as long as the biodegradation rate with enzymatic hydrolysis and soil degradation. Finally, the dispersion and the adhesion were studied with scanning electron microscopy (SEM).
Fallback accretion in the aftermath of a compact binary merger
Creators: name: Rosswog, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent observations of long and short gamma-ray bursts have revealed a puzzling X-ray activity that in some cases continues for hours after the burst. It is difficult to reconcile such time scales with the viscous time scales that an accretion disk can plausibly provide. Here I discuss the accretion activity expected from the material that is launched into eccentric, but gravitationally bound orbits during a compact binary merger coalescence. From a simple analytical model the time scales and accretion luminosities that result from fallback in the aftermath of a compact binary merger are derived. For the considered mass range, double neutron star binaries are relatively homogeneous in their fallback luminosities. Neutron star black hole systems show a larger spread in their fallback behaviour. While the model is too simple to make predictions about the detailed time structure of the fallback, it makes reasonable predictions about the gross properties of the fallback. About one hour after the coalescence the fallback accretion luminosity can still be as large as $\sim 10^{45}$ erg/s, a fraction of which will be transformed into X-rays. Large-scale amplitude variations in the X-ray luminosities can plausibly be caused by gravitational fragmentation, which for the high-eccentricity fallback should occur more easily than in an accretion disk.
description: accepted for publication in MNRAS letters, minor changes due to referee comments, 3 figures
EXPLORING THE CHALLENGES AND OPPORTUNITIES OF EDUCATIONAL MANAGEMENT IN A DIGITAL LEARNING ENVIRONMENT
Creators: name: Haydarova, Kamola
Publisher: name: Zenodo
Year: 2024

description: This article examines the pivotal role of educational leaders in promoting innovation and creativity within schools. Key enablers such as visionary leadership, professional development, collaborative cultures, and teacher autonomy are explored. The article also identifies major challenges like rigid curricula, limited resources, and resistance to change, while offering solutions such as advocating for flexible curricula, fostering a growth mindset, and securing external funding.
Emergent Stripes of Active Rotors in Shear Flows
Creators: name: Zhao, Zhiyuan
name: Wang, Boyi
name: Komura, Shigeyuki
name: Yang, Mingcheng
name: Ye, Fangfu
name: Seto, Ryohei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The shear-induced self-organization of active rotors into stripy aggregates is studied by carrying out computational simulations. The rotors, modeled by monolayers of frictional spheres, develop to stripy microstructures only when they counterrotate with respect to the vorticity of the imposed shear flow. The average width of the stripes is demonstrated to be linearly dependent on the relative intensity of active torque to the shear rate. By giving insight into three collective particle behaviors, i.e., shear-induced diffusion, rotation-induced rearrangement, and edge flows, we explain the mechanisms of formation of the particle stripes. Additionally, the rheological result shows the dependence of shear and rotational viscosities on the active torque direction and the oddness of the normal stress response. By exhibiting a collective phenomenon of active rotors, our study paves the way to understanding chiral active matter.
description: 13 pages, 16 figures
High action orbits for Tonelli Lagrangians and superlinear Hamiltonians on compact configuration spaces
Creators: name: Abbondandolo, Alberto
name: Figalli, Alessio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37J45

description: Multiplicity results for solutions of various boundary value problems are known for dynamical systems on compact configuration manifolds, given by Lagrangians or Hamiltonians which have quadratic growth in the velocities or in the momenta. Such results are based on the richness of the topology of the space of curves satisfying the given boundary conditions. In this note we show how these results can be extended to the classical setting of Tonelli Lagrangians (Lagrangians which are $C^2$-convex and superlinear in the velocities), or to Hamiltonians which are superlinear in the momenta and have a coercive action integrand.
description: 21 pages
Quantum Gate Pattern Recognition and Circuit Optimization for Scientific Applications
Creators: name: Jang, Wonho
name: Terashi, Koji
name: Saito, Masahiko
name: Bauer, Christian W.
name: Nachman, Benjamin
name: Iiyama, Yutaro
name: Kishimoto, Tomoe
name: Okubo, Ryunosuke
name: Sawada, Ryu
name: Tanaka, Junichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: There is no unique way to encode a quantum algorithm into a quantum circuit. With limited qubit counts, connectivities, and coherence times, circuit optimization is essential to make the best use of near-term quantum devices. We introduce two separate ideas for circuit optimization and combine them in a multi-tiered quantum circuit optimization protocol called AQCEL. The first ingredient is a technique to recognize repeated patterns of quantum gates, opening up the possibility of future hardware co-optimization. The second ingredient is an approach to reduce circuit complexity by identifying zero- or low-amplitude computational basis states and redundant gates. As a demonstration, AQCEL is deployed on an iterative and efficient quantum algorithm designed to model final state radiation in high energy physics. For this algorithm, our optimization scheme brings a significant reduction in the gate count without losing any accuracy compared to the original circuit. Additionally, we have investigated whether this can be demonstrated on a quantum computer using polynomial resources. Our technique is generic and can be useful for a wide variety of quantum algorithms.
description: 24 pages, 15 figures
Pharmacokinetics of PD123,497, a novel antiarrhythmic drug : early distribution phase in blood and tissues
Creators: name: Walker, Maria Louise
Publisher: name: University of British Columbia
Year: 2009

description: PDI 23,497 is a novel antiarrhythmic drug and the (+) enantiomer of PDII7,302, a kappa (κ) opioid agonist. Using a method of liquid-liquid chemical extraction and high performance liquid chromatography, the pharmacokinetics of PD123,497 in the rat were determined. Specifically, concentration-vs-time profiles were constructed reflecting the early distribution phase of an intravenous bolus dose of 8 µmol/kg in whole blood, heart, liver, brain, and skeletal muscle. The pharmacokinetic data for heart and blood correlated well with the time course of heart rate and blood pressure effects as determined in previous pharmacological assays. The data also correlated well with pharmacological screens in dogs and baboons indicating that the rat model is demonstrative of the situation in other species. Skeletal muscle data indicated a significant capacity for drug accumulation in the muscle beds. Liver data indicated slow uptake and storage of parent drug. Termination of therapeutic effect appeared to be the result of redistribution into other tissues and not metabolism or elimination. Concentrations in the heart were several times higher than that of the blood immediately after administration of drug via the tail vein. This suggests a potential for alpha-phase toxicity. Brain data showed that peak concentration was achieved after that in the heart indicating redistribution from the heart and suggesting that PD123,497 may be able to produce significant CNS side effects.
D4.4 FAIR Data Cubes -Release I
Creators: name: Mantovani, Simone
Publisher: name: Zenodo
Year: 2021
Subjects: RELIANCE
Research Objects
ROhub
RO-Crate
Data cubes
EOSC

description: This document describes the FAIR Data Cube resources requested by RELIANCE user communities and made available within the RELIANCE project. The FAIR Data Cube resources will be stored in cloud resources allocated in RELIANCE partner infrastructures, and discussion with external projects and initiatives (e.g. DICE H2020 Project) has started to evaluate the potential synergy and provisioning of additional cloud storage. The Data Cube Metadata Model adopted for describing FAIR Data Cubes and Data Cube API are detailed in the D4.1 and D4.2, respectively. Two further releases of this deliverable are planned at month M12 and M21 to track the extension of Data Cube resources made available within the RELIANCE project
Towards an independent determination of muon g-2 from muonium spectroscopy
Creators: name: Delaunay, Cédric
name: Ohayon, Ben
name: Soreq, Yotam
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that muonium spectroscopy in the coming years can reach a precision high enough to determine the anomalous magnetic moment of the muon below one part per million (ppm). Such an independent determination of muon g-2, which is not limited by hadronic uncertainties, would certainly shed light on the 2ppm difference currently observed between spin-precession measurements and (R-ratio based) Standard Model predictions. The magnetic dipole interaction between electrons and (anti)muons bound in muonium gives rise to a hyperfine splitting (HFS) of the ground state which is sensitive to the muon anomalous magnetic moment. A direct comparison of the muonium frequency measurements of the HFS at J-PARC and the 1S-2S transition at PSI with theory predictions will allow to extract muon g-2 with high precision. Improving the accuracy of QED calculations of these transitions by about one order of magnitude is also required. Moreover, the good agreement between theory and experiment for the electron g-2 indicates that new physics interactions are unlikely to affect muonium spectroscopy down to the envisaged precision.
description: matches published version, full supplemental material
Wilderness preservation and protection of old-growth forests
Creators: name: Watson, Victoria G
Publisher: name: University of British Columbia
Year: 2009

description: This research on the benefits of increased wilderness preservation has entailed the development of contingent valuation surveys to elicit consumer’s WTP for the province of British Columbia. The study came about after the Protected Areas Strategy (PAS) proposed an additional 6% of B.C.’s land base be set aside for protection. Two surveys were used, one survey was distributed province-wide, while the other was issued to third and fourth year university students in both land use and forestry economics. A dichotomous choice format was chosen as the most appropriate approach due to its simplistic nature and its success in previous studies. Similarly, a logistic model was applied to calculate the probability of a person agreeing to pay to a pre-determined offer amount. The results of the province-wide survey indicated that respondents valued additional wilderness protection in British Columbia at $371.34 per household per year. Aggregating this amount to include all B.C. households yielded a value of $484 million per year. The results of the classroom survey showed that the respondent’s WTP was $326 per year for a total of $716 million when aggregated for the whole adult population in B.C. The differnce between WTP values between surveys is partly due to the fact that the WTP for the classroom survey is on a per person basis while the estimated WTP for the provincial survey is on a per household basis. Similarly, the province-wide survey included individuals of all educational backgrounds while the classroom survey included only individuals with post secondary education. Finally, while the Government of B.C. has decided to increase the level of wilderness protection to 12 percent, the average desired level of protection for both surveys used in this paper was 10.75 percent.
Επίδραση της αρδευτικής αγροτικής πίεσης σε χωρικό επίπεδο στη βιολογική ποιότητα των νερών του ποταμού Στρυμόνα
Creators: name: Χρόνης, Ιωάννης Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Αρδευτική πίεση
Βιολογική ποιότητα
Ποταμός Στρυμόνας
Irrigation pressure
Biological quality
Strymonas river

description: Η μελέτη παρουσιάζει την επίδραση της αρδευτικής αγροτικής πίεσης στη βιολογική ποιότητα των υδάτων του ποταμού Στρυμόνα. Η βιολογική ποιότητα αξιολογήθηκε μέσω βενθικών μακροασπονδύλων, τα οποία συλλέχθηκαν σε συγκεκριμένα σημεία κατά μήκος του ποταμού. Για τον προσδιορισμό των αγροτικών χρήσεων γης χρησιμοποιήθηκαν τα δεδομένα του Corine Land Cover 2000. Για την ανάλυση της επιφανειακής ροής εφαρμόστηκε κατασκευασμένο Ψηφιακό Υψομετρικό Μοντέλο. Αυτή η πληροφορία σε συνδυασμό με τη φωτοερμηνεία δορυφορικών εικόνων χρησιμοποιήθηκε ως βάση για την εφαρμογή χωρικών δεικτών ώστε να επιτευχθεί ο προσδιορισμός της αγροτικής πίεσης. Επιλεγμένοι χωρικοί και μορφολογικοί δείκτες από τη διεθνή βιβλιογραφία χρησιμοποιήθηκαν για την επεξεργασία των δεδομένων, ενώ δημιουργήθηκε ένας συνδυασμένος χωρικός δείκτης πίεσης για τις ανάγκες της μελέτης. Η βιολογική ποιότητα των υδάτων αξιολογήθηκε με το Ελληνικό Σύστημα Αξιολόγησης (Ε.Σ.Α.). Προσδιορίστηκε η χωρική μονάδα για την εφαρμογή των δεικτών, η οποία ονομάστηκε στραγγιστική υποπεριοχή. Όλα τα χωρικά δεδομένα έχουν επεξεργαστεί με το γεωγραφικό σύστημα πληροφοριών. Τα αποτελέσματα όλων των δεικτών παρουσιάζονται σε θεματικούς χάρτες της περιοχής μελέτης. Συσχετίζεται και γίνεται προσπάθεια υπολογισμού της πίεσης μέσω της χωρικής ανάλυσης. Προτείνονται επίσης μέτρα για τη μείωση της πίεσης που προέρχεται από την άρδευση.
description: In the present study it is presented the influence of irrigation agricultural pressure on the biological quality of Strymonas River. The latter was evaluated by using the benthic macroinvertebrates, which were collected on specific sites along the river. In order to determine the irrigation agricultural use in Stymonas basin, we used the Corine Land Cover 2000. To represent the surface runoff surface hydrologic analysis was employed on the constructed Digital Terrain Model. These information layers, together with the photo-interpretation of satellite images were used to formulate spatial indicators for the identification of irrigation agricultural pressure on the biological water quality. Spatial indicators were selected from the international bibliography for the analysis of the data and a new combined indicator was constructed for the expression of the pressure. The Hellenic Evaluation Score (HES) was used for the evaluation of the biological water quality. The selected scale of the geographic analysis was the sub-basin, thus indicators were evaluated at this level using the geographical information system (GIS). All results were displayed as thematic maps of the study area. The correlation among the indicators used, the spatial analysis and the determination of the pressure are discussed. Finally, measures are proposed for the decrease of pressure from the irrigated agricultural land.
Τεχνική αποτελεσματικότητα επιχειρήσεων επεξεργασίας βρώσιμης ελιάς Χαλκιδικής εν μέσω κρίσης (2009-2012)
Creators: name: Κούτλου, Μαρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Ελιά Χαλκιδικής
Τεχνική αποτελεσματικότητα
Περιβάλλουσα ανάλυση δεδομένων (DEA)
Chalkidiki’s olives
Technical efficiency
Data envelopment analysis (DEA)

description: Η παρούσα διατριβή στοχεύει στην εκτίμηση της τεχνικής αποτελεσματικότητας των επιχειρήσεων επεξεργασίας βρώσιμης ελιάς Χαλκιδικής και τη σύγκριση αυτής μεταξύ των ετών 2009-2010, 2010-2011 και 2011-2012. Επιμέρους προσδιορίζονται τα χαρακτηριστικά των ιδιοκτητών-διαχειριστών των επιχειρήσεων, διερευνούνται γενικά χαρακτηριστικά των επιχειρήσεων και εκτιμούνται οικονομικές μεταβλητές, όπως οι δαπάνες του σταθερού και μεταβλητού κεφαλαίου και της οικογενειακής και ξένης εργασίας. Η πρωτογενής έρευνα για τη συλλογή των στοιχείων διενεργήθηκε, με την χρήση ερωτηματολογίων κατά τη χρονική περίοδο 2011-2012. Συλλέχθηκαν στοιχεία για κάθε μία από τις καλλιεργητικές περιόδους 2009-2010, 2010-2011 και 2011-2012. Η τεχνική αποτελεσματικότητα των επιχειρήσεων υπολογίζεται με την βοήθεια της Περιβάλλουσας Ανάλυσης Δεδομένων (Data Envelopment Analysis‐DEA). Η ανάλυση έδειξε ότι παρά την οικονομική κρίση που αντιμετωπίζει η χώρα, οι επιχειρήσεις επιτυγχάνουν υψηλά επίπεδα συνολικής τεχνικής αποτελεσματικότητας, αποδεικνύοντας τον καθοριστικό ρόλο της λειτουργίας τους στο σύνολο της τοπικής και εθνικής οικονομίας. Η οικογενειακή εργασία ακολουθουμένη από την ξένη αποτελούν τις μεταβλητές που πρέπει να μεταβληθούν περισσότερο προκειμένου η μέση επιχείρηση να είναι πλήρως αποτελεσματική με δεδομένη την ακαθάριστη πρόσοδο και την υπάρχουσα τεχνολογία.
description: The present study aims to estimate the technical efficiency of Chalkidiki olives processing enterprises and attempts to compare them between the years 2009-2010, 2010-2011 and 2011-2012. Some additional objectives are to identify the characteristics of the owners-managers of enterprises, investigate the general characteristics of the firms and measure the economical variables, such as the costs of fixed and variable capital and the value of family and foreign labor. The primary research for the collection of data was held, by the use of questionnaire at the time period 2011-2012. Data was collected for each of the cultivated periods 2009-2010, 2010-2011 and 2011-2012. The method of Data Envelopment Analysis is used to estimate the technical efficiency of enterprises. Despite the economical crisis that is faced by the country, the results of research showed that enterprises succeed in reaching high levels of overall technical efficiency, proving its decisive role in the regional and national economy. Family labor followed by an outside one are the variables which should be changed more, in order for the enterprises, on average, to be fully effective in view of stable gross income and existing technology.
Additional file 2 of Establishment of an ovarian cancer omentum metastasis-related prognostic model by integrated analysis of scRNA-seq and bulk RNA-seq
Creators: name: Zhang, Dongni
name: Lu, Wenping
name: Cui, Shasha
name: Mei, Heting
name: Wu, Xiaoqing
name: Zhuo, Zhili
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2.
Performance Analysis of Iterative Channel Estimation and Multiuser Detection in Multipath DS-CDMA Channels
Creators: name: Li, Husheng
name: Betz, Sharon M.
name: Poor, H. Vincent
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper examines the performance of decision feedback based iterative channel estimation and multiuser detection in channel coded aperiodic DS-CDMA systems operating over multipath fading channels. First, explicit expressions describing the performance of channel estimation and parallel interference cancellation based multiuser detection are developed. These results are then combined to characterize the evolution of the performance of a system that iterates among channel estimation, multiuser detection and channel decoding. Sufficient conditions for convergence of this system to a unique fixed point are developed.
description: To appear in the IEEE Transactions on Signal Processing
Urban Agriculture and Urban Food Provisioning in Pre-1850 Europe: Towards a Research Agenda
Creators: name: Soens, Tim
Publisher: name: Rural History Yearbook
Year: 2019

description: “Feeding the city” has been a prominent topic in historical literature for many decades. Most of this literature, however, remained based on the assumption that cities above a certain population level are essentially fed through the market, with rural agricultural surpluses being exchanged for the products of urban industry and trade. Stimulated by recent articulations of alternative ways of urban food provision- ing, this article reconsiders the importance of urban agriculture in European towns before 1850 from the perspective of “urban food alternatives”. The scattered evidence suggests that in many European towns a significant part of the urban population was directly involved in food production, but also that important differences persisted both between towns and between households in a town. While traditional interpre- tations – for instance, those linking urban agriculture with small towns, poverty, or the rise of commercial horticulture – fail to explain this spatial, social, and temporal variation, a better understanding of the success and decline of urban agriculture in dif- ferent market configurations and in different social contexts might offer an important historical contribution to present-day debates on the viability and social dynamics of such urban food alternatives.
description: Rural History Yearbook, Bd. 16 (2019): Farming the City. Resilienz und Niedergang der städtischen Landwirtschaft in der europäischen Geschichte
Retrofitted Gravity Mediation without the Gravitino-overproduction Problem
Creators: name: Endo, Motoi
name: Takahashi, Fuminobu
name: Yanagida, T. T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a retrofitted gravity mediation model which alleviates the gravitino overproduction from decays of an inflaton and a supersymmetry breaking field. In the model, we introduce an approximate U(1) symmetry under which the supersymmetry breaking field is charged, although it is broken by a mass term of messenger fields to generate gaugino masses of order the weak scale. In a low-scale inflation model, we find regions in which the gravitino overproduction problem is avoided.
description: 24 pages, 3 figures
Two Experiences of Urban Agriculture in Medieval Piedmont
Creators: name: Leggero, Roberto
name: Montanari, Mirella
Publisher: name: Rural History Yearbook
Year: 2019

description: The main line of investigation that led to the comparison of a proto-city such as Chieri with Novara was the discovery that urban agriculture was influenced by the city’s network and relationship with the environment. The arid clay soils around Chieri and the scarcity of water pushed it towards specialised production of wine for markets and the creation of areas inside the city for the processing of agricultural products. In contrast, the Roman urban model of Novara and the character of its surrounding countryside facilitated the development of vegetable gardens and peri-urban crops. Two different urban structures and two different territories generated two diverse forms of urban agriculture.
description: Rural History Yearbook, Bd. 16 (2019): Farming the City. Resilienz und Niedergang der städtischen Landwirtschaft in der europäischen Geschichte
Fuzzball solutions for black holes and D1-brane--D5-brane microstates
Creators: name: Skenderis, Kostas
name: Taylor, Marika
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We revisit the relation between fuzzball solutions and D1-D5 microstates. A consequence of the fact that the R ground states (in the usual basis) are eigenstates of the R-charge is that only neutral operators can have non-vanishing expectation values on these states. We compute the holographic 1-point functions of the fuzzball solutions and find that charged chiral primaries have non-zero expectation values, except when the curve characterizing the solution is circular. The non-zero vevs reflect the fact that a generic curve breaks R-symmetry completely. This implies that fuzzball solutions (excepting circular ones) can only correspond to superpositions of R states and we give a proposal for the superposition corresponding to a given curve. We also address the question of what would be the geometric dual of a given R ground state.
description: 4 pages, PRL version
“... a great hurt to many, and of advantage to very few”
Creators: name: French, Henry R.
Publisher: name: Rural History Yearbook
Year: 2019

description: This article will consider the relationship between the agrarian use-rights and political governance of urban common lands in English towns, in the period c. 1500–1840, and assess how far these common rights correspond to Elinor Ostrom’s model of “Common Pool Resource” (CPR) management. It will review the most frequent varieties of common land and common rights held by the residents of English towns and argue that systems of commons management in English towns were always connected closely to urban political structures. Freemen, who were commons users in one context, were urban electors, defenders of corporate monopolies, or rent-seekers in other contexts. The governance, and the very survival, of urban commons could be affected by these additional imperatives. The defence of common rights often involved the assertion of a minority privilege, even if this was usually expressed in terms of a collective, or universal, civic right. Ironically, this defence was undermined fatally by the expansion of parliamentary and corporate electorates in the 1830s. When civic politics began to take account of the interests of a wider middle-class majority, the access privileges of borough freemen were swiftly abolished. These features mean that the longevity and eventual abolition of English urban commons conforms more closely to research by Sheilagh Ogilvie and Maïka De Keyzer about the “distributional effects” of unequal power relationships and external influences on economic institutions than to Ostrom’s assumption that the survival of CPR management structures was determined ultimately by their economic efficiency.
description: Rural History Yearbook, Bd. 16 (2019): Farming the City. Resilienz und Niedergang der städtischen Landwirtschaft in der europäischen Geschichte
The Longue Durée in Polish Towns: Agriculture from the Sixteenth to the Nineteenth Century
Creators: name: Miodunka, Piotr
Publisher: name: Rural History Yearbook
Year: 2019

description: The paper deals with the ruralisation of small Polish towns in the long-term perspective. This is a particularly important trend because the urban network in Po- land was, with the exception of a few cities, dominated by small towns. The present state of research suggests that for more than 50 percent of the inhabitants of these towns, agriculture was a primary source of income. This issue is reconsidered here using the example of small towns in southern Poland (in the period 1772–1918, the western part of Austrian Galicia). The following questions are addressed in detail: area and structure of agricultural land, size distribution of urban farms, general economic conditions for urban agriculture, types of farming, self-sufficiency in grain production, and strategies of urban farmers. These are examined above all on the basis of primary sources: the first Austrian land cadastre of 1785 (the Josephine Cadastre) and population censuses from the eighteenth to the twentieth century. The results of this research suggest that involvement in agriculture among town-dwellers was on the whole relatively stable until the mid-nineteenth century, but varied considerably from individual to individual depending on a range of factors (e.g. material status). They also indicate that agriculture had more of a supplementary than a primary role in urban families’ income structure.
description: Rural History Yearbook, Bd. 16 (2019): Farming the City. Resilienz und Niedergang der städtischen Landwirtschaft in der europäischen Geschichte
The evolution of magnetic tower jets in the laboratory
Creators: name: Ciardi, A.
name: Lebedev, S. V.
name: Frank, A.
name: Blackman, E. G.
name: Chittenden, J. P.
name: Jennings, C. J.
name: Ampleford, D. J.
name: Bland, S. N.
name: Bott, S. C.
name: Rapley, J.
name: Hall, G. N.
name: Suzuki-Vidal, F. A.
name: Marocchino, A.
name: Lery, T.
name: Stehle, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The evolution of laboratory produced magnetic jets is followed numerically through three-dimensional, non-ideal magnetohydrodynamic simulations. The experiments are designed to study the interaction of a purely toroidal field with an extended plasma background medium. The system is observed to evolve into a structure consisting of an approximately cylindrical magnetic cavity with an embedded magnetically confined jet on its axis. The supersonic expansion produces a shell of swept-up shocked plasma which surrounds and partially confines the magnetic tower. Currents initially flow along the walls of the cavity and in the jet but the development of current-driven instabilities leads to the disruption of the jet and a re-arrangement of the field and currents. The top of the cavity breaks-up and a well collimated, radiatively cooled, 'clumpy' jet emerges from the system.
description: 34 Pages, 10 Figure, Accepted for publication in Physics of Plasmas
Allpix-Squared Simulations of Multi-element Germanium Detectors for Synchrotron Applications
Creators: name: Saleem, T.
name: Iguaz, F. J.
name: Orsini, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: X-rays spectroscopy experiments at synchrotron facilities were limited for many years by the maximum input-count rate and the signal-to-background ratio of germanium fluorescence detectors. These limitations are related to the germanium semiconductor device, the sensor configuration and its response to the incident X-ray flux at different energies. In order to understand and quantify such limitations, physics simulation of the detector response is a powerful tool to provide guidelines for designing, prototyping and improving detectors, as well as modelling experimental environments, which reduces time and cost of development. For this purpose, a first complete and operational simulation chain based on Allpix Squared framework is presented, customized to multi-element germanium detectors and combined with three-dimensional simulations of the electric field and the weighting potential, based on COMSOL Multiphysics. Based on this simulation chain, a quantification of charge sharing effect as well as signal-to-background ratio at different beam energies has been made for a germanium detector equipped with and without collimator. In addition, two experimental measurements have been performed on the SAMBA beamline at SOLEIL synchrotron. The experimental data were used to set up the full simulation chain and good agreements have been observed between data and simulation.
description: Preprint JINST
From Home Food Production to Professional Farming
Creators: name: De Graef, Pieter
name: Ronsijn, Wouter
Publisher: name: Rural History Yearbook
Year: 2019

description: We explore the geographical and social continuum of food production in and around towns in nineteenth-century Belgium. We do so by using household-level data for two Flemish towns, Oudenaarde and Kortrijk, which allow us to reconstruct variation in agricultural activities depending on the location and profession of the households. We find a sharp distinction between households living in the town cores and those living outside the agglomeration, as well as between those reporting agricultural and non-agricultural professions. Outside the town walls, production strategies differed little from the surrounding countryside. In contrast, the focus in the urban cores was on high-yielding vegetables and potatoes, and on specific livestock production. Only a small minority of ca. 10 per cent of urban households occupied agricultural land. Those who did were able to cover much of their subsistence needs for vegetables and potatoes, but not for cereals.
description: Rural History Yearbook, Bd. 16 (2019): Farming the City. Resilienz und Niedergang der städtischen Landwirtschaft in der europäischen Geschichte
Matching LTB and FRW spacetimes through a null hypersurface
Creators: name: Khakshournia, S.
name: Mansouri, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Matching of a LTB metric representing dust matter to a background FRW universe across a null hypersurface is studied. In general, an unrestricted matching is possible only if the background FRW is flat or open. There is in general no gravitational impulsive wave present on the null hypersurface which is shear-free and expanding. Special cases of the vanishing pressure or energy density on the hypersurface is discussed. In the case of vanishing energy momentum tensor of the null hypersurface, i.e. in the case of a null boundary, it turns out that all possible definitions of the Hubble parameter on the null hypersurface, being those of LTB or that of FRW, are equivalent, and that a flat FRW can only be joined smoothly to a flat LTB.
description: 9 pages
Thermalization in Large-N CFTs
Creators: name: Karlsson, Robin
name: Parnachev, Andrei
name: Tadić, Petar
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In d-dimensional CFTs with a large number of degrees of freedom an important set of operators consists of the stress tensor and its products, multi stress tensors. Thermalization of such operators, the equality between their expectation values in heavy states and at finite temperature, is equivalent to a universal behavior of their OPE coefficients with a pair of identical heavy operators. We verify this behavior in a number of examples which include holographic and free CFTs and provide a bootstrap argument for the general case. In a free CFT we check the thermalization of multi stress tensor operators directly and also confirm the equality between the contributions of multi stress tensors to heavy-heavy-light-light correlators and to the corresponding thermal light-light two-point functions by disentangling the contributions of other light operators. Unlike multi stress tensors, these light operators violate the Eigenstate Thermalization Hypothesis and do not thermalize.
description: 67 pages. 6 figures. v2: References added. v3: Minor corrections
Between Village, Utopian Settlement, and Garden City
Creators: name: Peper, Ines
Publisher: name: Rural History Yearbook
Year: 2019

description: Eisenheim was founded in 1844 near Oberhausen in the Ruhr by the mining company Gutehoffnungshütte as one of the earliest company housing projects in Germany. Like the later “colonies” by Krupp, BASF, or Farbwerke Höchst, the settlement was intended to attract workers from other regions by providing affordable housing and usually also access to land for gardening. The paper contributes to a historical contextualisation of today’s discourse on urban agriculture by first examining urban gardening and agricultural facilities in the mining company settlement of Eisenheim and then placing this case study within the broader development of urban agriculture from the eighteenth to the twentieth centuries. Eisenheim is then compared to four other “model villages” which, while represent- ing a wide range of ideological motivations and socio-economic backgrounds, faced similar challenges in their agricultural aspirations. The main reference points of this analysis are: first, how access to land was organised, what property regimes were put in place, and how this affected the long-term preservation of agricultural land use. Second, what impact subsistence agriculture had on the residents’ food resilience, quality of diet, and household income formation. Third, how subsistence gardening and agriculture and the spatial organisation of the settlements’ green areas contributed to the residents’ community life.
description: Rural History Yearbook, Bd. 16 (2019): Farming the City. Resilienz und Niedergang der städtischen Landwirtschaft in der europäischen Geschichte
The nozzle shock in tidal disruption events
Creators: name: Bonnerot, Clément
name: Lu, Wenbin
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Tidal disruption events (TDEs) occur when a star gets torn apart by the strong tidal forces of a supermassive black hole, which results in the formation of a debris stream that partly falls back towards the compact object. This gas moves along inclined orbital planes that intersect near pericenter, resulting in a so-called "nozzle shock". We perform the first dedicated study of this interaction, making use of a two-dimensional simulation that follows the transverse gas evolution inside a given section of stream. This numerical approach circumvents the lack of resolution encountered near pericenter passage in global three-dimensional simulations using particle-based methods. As it moves inward, we find that the gas motion is purely ballistic, which near pericenter causes strong vertical compression that squeezes the stream into a thin sheet. Dissipation takes place at the resulting nozzle shock, inducing a rise in pressure that causes the collapsing gas to bounce back, although without imparting significant net expansion. As it recedes to larger distances, this matter continues to expand while remaining thin despite the influence of pressure forces. This gas evolution specifies the strength of the subsequent self-crossing shock, which we find to be more affected by black hole spin than previously estimated. We also evaluate the impact of general-relativistic effects, viscous dissipation, magnetic fields and radiative processes on the nozzle shock. This study represents an important step forward in the theoretical understanding of TDEs, bridging the gap between our robust knowledge of the fallback rate and the more complex following stages, during which most of the emission occurs.
description: 25 pages, 16 figures, accepted by MNRAS. A movie from the simulation is available at http://www.tapir.caltech.edu/~bonnerot/nozzle-shock.html
Theta Error Control with Time- stepping Algorithms applied to the Explicit methods with Complex Eigenvalues
Creators: name: S.Thilaganathan, S.Loheeswaran
Publisher: name: Zenodo
Year: 2024

description: Standard adaptive algorithm used to solve the linear systems perform well during the finite time of integration with fixed initial condition and performs poorly in three areas. To overcome these difficulties, the Phase Space Error control criterion established. In this paper we analyse forward Euler method applied to the linear system whose coefficient matrix has complex eigenvalues with negative real parts. Some theoretical results are obtained.
A categorification of quantum sl(2)
Creators: name: Lauda, Aaron D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 20G42, 14M15, 17B37, 16W50

description: We categorify Lusztig's version of the quantized enveloping algebra for sl(2). Using a graphical calculus a 2-category is constructed whose split Grothendieck ring is isomorphic to Lusztig's algebra. The indecomposable morphisms of this 2-category lift Lusztig's canonical basis, and the Homs between 1-morphisms are graded lifts of a semilinear form defined on quantum sl(2). Graded lifts of various homomorphisms and antihomomorphisms of Lusztig's algebra arise naturally in the context of our graphical calculus. Using iterated flag varieties, a representation of the 2-category is constructed for each positive integer N. This representation categorifies the irreducible (N+1)-dimensional representation of quantum sl(2).
description: 89 pages, LaTeX2e with xypic and pstricks macros v3. updates notation to match arXiv:0807.3250 and corrects misprints