cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The reaction pi N -> pi pi N in chiral effective field theory with explicit Delta(1232) degrees of freedom
Creators: name: Siemens, D.
name: Bernard, V.
name: Epelbaum, E.
name: Krebs, H.
name: Meißner, Ulf-G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The reaction pi N -> pi pi N is studied at tree level up to next-to-leading order in the framework of manifestly covariant baryon chiral perturbation theory with explicit Delta(1232) degrees of freedom. Using total cross section data to determine the relevant low-energy constants, predictions are made for various differential as well as total cross sections at higher energies. A detailed comparison of results based on the heavy-baryon and relativistic formulations of chiral perturbation theory with and without explicit Delta degrees of freedom is given.
description: 30 pages, 13 figures
The FAIR Game
Creators: name: Roos, Marco
name: Carta, Claudio
name: dos Santos Vieira, Bruna
name: Kaliyaperumal, Rajaram
name: Kersloot, Martijn
name: Jacobsen, Annika
name: Cornet, Ronald
name: Wilkinson, Mark
name: Hanauer, Marc
name: Benis, Nirupama
name: Lee Cellai, Laura
name: Bernabé, César Henrique
name: Taruscio, Domenica
name: 't Hoen, P.A.C.
name: Cámara Ballesteros, Alberto
name: de Oliveira Coelho Henriques, Ines
name: Ramírez García, Jose Antonio
name: Zhang, Shuxin
name: van der Velde, Joeri
name: Swertz, Morris A.
Publisher: name: Zenodo
Year: 2023
Subjects: FAIR Game

description: A game design document describing collaborators, credits, materials, implementations, and workflows of the FAIR Game.

The FAIR Game is a training resource to increase understanding of the benefits of implementing the FAIR data principles.

The game takes the user through a journey of linking patient data across different rare disease registries. The registries differ in location, language and patients. The user must find a drug that treats his/her patient by researching several registries. The challenge is to achieve that without FAIR data, and the solution includes unblocking the "ontology room", where after data is made FAIR, a federated analysis of FAIR data in real-time is possible. With the ontology room enabled, the solution is instantaneous.
The FAIR Game
Creators: name: Roos, Marco
name: Carta, Claudio
name: dos Santos Vieira, Bruna
name: Kaliyaperumal, Rajaram
name: Kersloot, Martijn
name: Jacobsen, Annika
name: Cornet, Ronald
name: Wilkinson, Mark
name: Hanauer, Marc
name: Benis, Nirupama
name: Lee Cellai, Laura
name: Bernabé, César Henrique
name: Taruscio, Domenica
name: 't Hoen, P.A.C.
name: Cámara Ballesteros, Alberto
name: de Oliveira Coelho Henriques, Ines
name: Ramírez García, Jose Antonio
name: Zhang, Shuxin
name: van der Velde, Joeri
name: Swertz, Morris A.
Publisher: name: Zenodo
Year: 2023
Subjects: FAIR Game

description: A game design document describing collaborators, credits, materials, implementations, and workflows of the FAIR Game.

 The FAIR Game is a training resource to increase understanding of the benefits of implementing the FAIR data principles.

 The game takes the user through a journey of linking patient data across different rare disease registries. The registries differ in location, language and patients. The user must find a drug that treats his/her patient by researching several registries. The challenge is to achieve that without FAIR data, and the solution includes unblocking the "ontology room", where after data is made FAIR, a federated analysis of FAIR data in real-time is possible. With the ontology room enabled, the solution is instantaneous.
Characterizing freshwater macroinvertebrates of Bangladesh using metagenetic techniques
Creators: name: Rahman, Md Mizanur
Publisher: name: Imperial College London
Year: 2022

description: The degradation of freshwater ecosystems has become a global concern, in particular, the critical conditions of rivers in Bangladesh demand a monitoring programme through the assessment of bioindicator organisms. Macroinvertebrates as prominent bioindicators are widely used for assessing the health of aquatic ecosystems. Recent technological advances have enabled routine assessment with the genomic characterization of macroinvertebrates using different metagenetic techniques such as DNA barcoding for individual specimen identification, metabarcoding for multi-species identification of bulk samples and mitochondrial metagenomics for extraction of mitogenomes from mixed samples. In this thesis, I commence by generating Cytochrome Oxidase subunit (COI) barcodes for Bangladeshi freshwater macroinvertebrates belonging to the Ephemeroptera, Plecoptera, Trichoptera, Coleoptera, Hemiptera, Odonata, Diptera, Gastropoda and Bivalvia. These barcodes can be used as a DNA reference library for species identification in metabarcoding of macroinvertebrates. I also aim for exploring complete mitogenomes from selected macroinvertebrates using a mitochondrial metagenomic pipeline. I carry out phylogenetic analysis with protein-coding genes that reveals the evolutionary relationship of Bangladeshi macroinvertebrate lineages and also support deeper level identification of barcodes placing them into the phylogenetic tree (chapter 2). In chapter 3, I assess some methodological aspects of the metabarcoding pipeline required for diversity estimation from complex bulk samples of macroinvertebrates in large-scale biomonitoring programmes. These include preparation of bulk macroinvertebrate samples, optimization of the procedure of homogenization of samples required for DNA extraction, strategies for DNA pooling from these extracts, choice of robust universal primers, and viable OTU clustering for reliable diversity estimation. The results have implications for the optimization and standardization of these steps in metabarcoding of freshwater macroinvertebrates. In chapter 4, I apply the metabarcoding technique to establish the macroinvertebrate diversity and impact of various types of anthropogenic disturbances on the freshwater macroinvertebrates in highland and lowland rivers. The results document high diversity, local endemicity and pronounced responses to disturbance in largely unexplored but threatened habitats of Bangladesh. My investigations manifest the viability of metagenetic techniques for applied conservation management as a step towards building a biomonitoring system in freshwater ecosystems globally.
Institutional ethic approval from The effect of stent graft curvature on the hemodynamic displacement force after abdominal aortic aneurysm endovascular repair
Creators: name: Brand, Moshe
name: Yoel, Bar
name: Eichler, Eran
name: Speter, Chen
name: Halak, Moshe
name: Marom, Gil
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Biological Engineering
subject: 110601 Biomechanics
subject: FOS: Health sciences
subject: 90399 Biomedical Engineering not elsewhere classified
subject: FOS: Medical engineering

description: Endovascular aortic aneurysm repair (EVAR) is a minimally invasive procedure with low mortality and morbidity. Clinical studies have revealed that a displacement force (DF) can cause stent graft (SG) migration in some circumstances requiring repeated intervention. This study aims to determine the relationship between the SG curvature and the calculated DF from four patient-specific computational fluid dynamics models. The SG's curvature was defined according to the centrelines of the implanted SG's branches. The centrelines were defined as either intersecting or separated lines. The centreline curvature (CLC) metrics were calculated based on the local curvature radii and the distances from the centrelines of idealized straight branches. The average CLC value and average variation were calculated to represent the entire graft's curvature. These CLC calculations were compared, and the method that gave the best correlation to the calculated DF was found. The optimal correlation is obtained from calculating the CLC average variation using separated centrelines and distance from straight lines, with an R2 = 0.89. Understanding the relationship between vascular morphology and DF can help identify at-risk patients before the procedure. In these cases, we can provide appropriate treatment and follow up with the patient to prevent future failure.
Testing the ePANACEA methodology
Creators: name: Frick, David
Publisher: name: Zenodo
Year: 2023

description: This report presents the findings and outcomes of the case studies conducted within the ePANACEA project, which aimed to test the three energy performance methods. The objective was to assess the effectiveness and applicability of these methods in various real-world scenarios across the partners' countries. The report provides an overview of the selected cases, outlines the methodology and validation process, describes the activity schedule for testing, explains the data collection process, and details the testing procedures.
The testing phase encompassed 15 cases distributed among the five partners' countries. Each case represented a unique energy performance scenario, allowing for a comprehensive evaluation of the three methods. The testing followed a systematic approach, adhering to a predefined schedule and employing standardized assessment templates.
Data collection was a crucial aspect of the testing process, enabling a robust analysis of the methods' performance. The report highlights the procedures implemented for collecting relevant data, ensuring accuracy, consistency, and completeness. The collected data served as the basis for evaluating the methods' efficacy and identifying any areas for improvement.
To facilitate the testing process, a user guide was developed, providing comprehensive instructions and guidelines to the participants. Timetables were established to ensure efficient coordination and adherence to the testing schedule. Furthermore, supporting processes were implemented to address any technical challenges or issues encountered during the testing phase.
The assessment template played a pivotal role in extracting meaningful results from the testing activities. The template captured valuable feedback about the methods from the participants, highlighting their strengths, weaknesses, and potential areas of enhancement. Additionally, a comparative analysis was conducted, allowing for a comprehensive evaluation of the three methods' performance across the different cases and partner countries.
Overall, the results obtained from the assessment template provided valuable insights into the effectiveness and suitability of the three energy performance methods. The report summarizes these results, offering a comprehensive overview of the feedback received and the comparison between the methods. The findings serve as a foundation for further refinement and development of the methods, ensuring their optimal utilization and implementation in future energy performance projects.
Summing Large-N Towers in Colour Flow Evolution
Creators: name: Plätzer, Simon
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider soft gluon evolution in the colour flow basis. We give explicit expressions for the colour structure of the (one-loop) soft anomalous dimension matrix for an arbitrary number of partons, and show how the successive exponentiation of classes of large-N contributions can be achieved to provide a systematic expansion of the evolution in terms of colour supressed contributions.
description: 8 pages, 5 figures
Hybridized/Coupled Multiple Resonances in Nacre
Creators: name: Choi, Seung Ho
name: Kim, Young L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report that nacre (also known as mother-of-pearl), a wondrous nanocomposite found in nature, is a rich photonic nanomaterial allowing the experimental realization of collective excitation and light amplification via coupled states. Localized modes in three-dimensional complex media are typically isolated in frequency and space. However, multiple local resonances can be hybridized in multilayered nanostructures of nacre so that the effective cavity size for efficient disordered resonators is scaled up. Localized modes in hybridized states in nacre are overlapped in frequency with similar shapes in space, thus being collectively excited and synergistically amplified. These hybridized states boost light amplification, leading to stable and regular multimode lasing at low excitation energy. The simplicity of ameliorating disordered resonators by mimicking nacre can further serve as platforms for developing cost-effective photonic systems and provide materials for fundamental research on complex media
description: 7 pages and 6 figures
Application of Particle Swarm Optimization to Microwave Tapered Microstrip Lines
Creators: name: Ulker, Ezgi Deniz
name: Ulker, Sadik
Publisher: name: arXiv
Year: 2014
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Application of metaheuristic algorithms has been of continued interest in the field of electrical engineering because of their powerful features. In this work special design is done for a tapered transmission line used for matching an arbitrary real load to a 50Ω line. The problem at hand is to match this arbitrary load to 50 Ω line using three section tapered transmission line with impedances in decreasing order from the load. So the problem becomes optimizing an equation with three unknowns with various conditions. The optimized values are obtained using Particle Swarm Optimization. It can easily be shown that PSO is very strong in solving this kind of multiobjective optimization problems.
description: 6 pages, 5 figures, 1 table
Fast optimization for large scale logistics in complex urban systems using the hybrid sparrow search algorithm
Creators: name: Yao, Yao
name: Lei, Siqi
name: Luo, Peng
Publisher: name: figshare
Year: 2023
Subjects: Applied computing not elsewhere classified

description: The zip archive (study_code.zip) contains code files implemented by a paper published at IJGIS:
 Fast optimization for large scale logistics in complex urban systems using the hybrid sparrow search algorithm

 Contact: Peng Luo Technical University of Munich peng.luo@tum.de

 The zip file (input_data.zip) contains 1,004 distribution warehouses and customer points (including latitude, longitude and customer demand data) of a logistics company in Wuhan, China. input_data.zip also provides sheets for the shortest distribution distances between distribution depots and customer points.

 This project uses some Python open source libraries (Numpy, Pandas, Matplotlib). This project is GPL-compliant.

 Numpy (https://numpy.org/) is an open source numerical computation tool developed by Travis Oliphant. It is used in this project for matrix manipulation. This library is licensed under the BSD license.

 Pandas (https://pandas.pydata.org/) is an open source library that provides high-performance, easy-to-use data structures and data analysis tools. This library is licensed under the BSD license.

 Matplotlib (https://matplotlib.org/) is one of the commonly used data visualization tools in Python, and is used in this project to more visually compare the performance of different algorithms. This library is compliant with the BSD license.

 This project also uses some Python standard libraries (math, time). This project uses them to calculate probability calculations and program runtime.
Physical Properties of Asteroids in Comet-like Orbits in Infrared Asteroid Survey Catalogs
Creators: name: Kim, Yoonyoung
name: Ishiguro, Masateru
name: Usui, Fumihiko
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We investigated the population of asteroids in comet-like orbits using available asteroid size and albedo catalogs of data taken with the Infrared Astronomical Satellite, AKARI, and the Wide-field Infrared Survey Explorer on the basis of their orbital properties (i.e., the Tisserand parameter with respect to Jupiter, TJ, and the aphelion distance, Q). We found that (i) there are 123 asteroids in comet-like orbits by our criteria (i.e., Q < 4.5 AU and TJ < 3), (ii) 80% of them have low albedo, pv < 0.1, consistent with comet nuclei, (iii) low-albedo objects among them have a size distribution shallower than that of active comet nuclei, that is, the power index of the cumulative size distribution of around 1.1, (iv) unexpectedly, a considerable number (i.e., 25 by our criteria) of asteroids in comet-like orbits have high albedo, pv > 0.1. We noticed that such high-albedo objects mostly consist of small (D < 3 km) bodies distributed in near-Earth space (with perihelion distance of q < 1.3 AU). We suggest that such high-albedo, small objects were susceptible to the Yarkovsky effect and drifted into comet-like orbits via chaotic resonances with planets.
description: 25 pages, 8 figures (Accepted to ApJ on May 12, 2014)
The impact of post-cutoff bend curvature on channel kinematics in meandering rivers: an example from the Trinity River, Texas, USA
Creators: name: Speed, Cole M.
name: Sylvester, Zoltán
name: Morris, Paul D.
name: Mohrig, David
Publisher: name: Geological Society of London
Year: 2023
Subjects: classificationCode: 3705
subject: Geology
subject: FOS: Earth and related environmental sciences

description: Table S1, Figures S1, S2 and S3: speed cutoffs
Efficiency at optimal work from finite reservoirs: a probabilistic perspective
Creators: name: Johal, Ramandeep S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We revisit the classic thermodynamic problem of maximum work extraction from two arbitrary sized hot and cold reservoirs, modelled as perfect gases. Assuming ignorance about the extent to which the process has advanced, which implies an ignorance about the final temperatures, we quantify the prior information about the process and assign a prior distribution to the unknown temperature(s). This requires that we also take into account the temperature values which are regarded to be unphysical in the standard theory, as they lead to a contradiction with the physical laws. Instead in our formulation, such values appear to be consistent with the given prior information and hence are included in the inference. We derive estimates of the efficiency at optimal work from the expected values of the final temperatures, and show that these values match with the exact expressions in the limit when any one of the reservoirs is very large compared to the other. For other relative sizes of the reservoirs, we suggest a weighting procedure over the estimates from two valid inference procedures, that generalizes the procedure suggested earlier in [J. Phys. A: Math. Theor. {\bf 46}, 365002 (2013)]. Thus a mean estimate for efficiency is obtained which agrees with the optimal performance to a high accuracy.
description: 14 pages, 6 figures
Fast optimization for large scale logistics in complex urban systems using the hybrid sparrow search algorithm
Creators: name: Yao, Yao
name: Lei, Siqi
Publisher: name: figshare
Year: 2022
Subjects: Applied computing not elsewhere classified

description: The zip archive (study_code.zip) contains code files implemented by a paper under review ("Fast optimization for large scale logistics in complex urban systems using the hybrid sparrow search algorithm").

The zip file (input_data.zip) contains 1,004 distribution warehouses and customer points (including latitude, longitude and customer demand data) of a logistics company in Wuhan, China. input_data.zip also provides sheets for the shortest distribution distances between distribution depots and customer points.

This project uses some Python open source libraries (Numpy, Pandas, Matplotlib). This project is GPL-compliant.

Numpy (https://numpy.org/) is an open source numerical computation tool developed by Travis Oliphant. It is used in this project for matrix manipulation. This library is licensed under the BSD license.

Pandas (https://pandas.pydata.org/) is an open source library that provides high-performance, easy-to-use data structures and data analysis tools. This library is licensed under the BSD license.

Matplotlib (https://matplotlib.org/) is one of the commonly used data visualization tools in Python, and is used in this project to more visually compare the performance of different algorithms. This library is compliant with the BSD license.

This project also uses some Python standard libraries (math, time). This project uses them to calculate probability calculations and program runtime.
Clausius' Entropy Revisited
Creators: name: Cohen, E. G. D.
name: Merlino, R. L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Conventional Non-equilibrium Thermodynamics is mainly concerned with systems in local equilibrium and their entropy production, due to the irreversible processes which take place in these systems. In this paper fluids will be considered in a state of local equilibrium. We argue that the main feature of such systems is not the entropy production, but the organization of the flowing currents in such systems. These currents do not only have entropy production, but must also have an organization needed to flow in a certain direction. It is the latter, which is the source of the equilibrium entropy, when the fluid goes from a local equilibrium state and to an equilibrium state. This implies a transmutation of the local equilibrium current's organization into the equilibrium entropy. Alternatively, when a fluid goes from an equilibrium state to a local equilibrium state, its entropy transmutes into the organization of the currents of that state.
$\mathbb Z_2$ fractional topological insulators in two dimensions
Creators: name: Repellin, C.
name: Bernevig, B. Andrei
name: Regnault, N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose a simple microscopic model to numerically investigate the stability of a two dimensional fractional topological insulator (FTI). The simplest example of a FTI consists of two decoupled copies of a Laughlin state with opposite chiralities. We focus on bosons at half filling. We study the stability of the FTI phase upon addition of two coupling terms of different nature: an interspin interaction term, and an inversion symmetry breaking term that couples the copies at the single particle level. Using exact diagonalization and entanglement spectra, we numerically show that the FTI phase is stable against both perturbations. We compare our system to a similar bilayer fractional Chern insulator. We show evidence that the time reversal invariant system survives the introduction of interaction coupling on a larger scale than the time reversal symmetry breaking one, stressing the importance of time reversal symmetry in the FTI phase stability. We also discuss possible fractional phases beyond $ν= 1/2$.
description: 15 pages, 18 figures
title: Efficacy of Formal Training and Education on Foster Child Abuse in Newly Hired Nurses
Creators: name: Jefferson, Andrea
name: Stascavage, Caroline
name: Foronda, Nico
name: Andrews, Michael
name: Ngoune, Brillant
name: Agustin, Rudolfo
Publisher: name: Old Dominion University Libraries
Year: 2017

description: Foster care child abuse cases are more prevalent in the United States. Evidence suggests a significant gap between self reports of abuse and reports by health professionals. 120 nurses will be selected to participate in formal training. A time series design will be used to test the participant’s knowledge before, immediately after, and six months after the formal training. The data collected will be analyzed using descriptive statistics for demographic variables and an one-way ANOVA test will determine significant differences among group scores. Limitations to the study include accessibility to sample size, turnover of participants, the self reporting nature of the questionnaires, test taker anxiety, the ability of the training presenters, and the participants’ knowledge they are being observed.
Study of EUV Emission and Properties of a Coronal Streamer from PROBA2/SWAP, Hinode/EIS and Mauna Loa Mk4 Observations
Creators: name: Goryaev, F.
name: Slemzin, V.
name: Vainshtein, L.
name: Williams, D. R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Wide-field EUV telescopes imaging in spectral bands sensitive to 1 MK plasma on the Sun often observe extended ray-like coronal structures stretching radially from active regions to distances of 1.5-2Rsun, which represent the EUV counterparts of white-light streamers. To explain this phenomenon, we investigated the properties of a streamer observed on October 20-21, 2010 by the PROBA2/SWAP EUV telescope together with the Hinode/EIS spectrometer (HOP 165) and the Mauna Loa Mk4 white-light coronagraph. In the SWAP 174 A band comprising the Fe ix - Fe xi lines, the streamer was detected to a distance of 2Rsun. We assume that the EUV emission is dominated by collisional excitation and resonant scattering of monochromatic radiation coming from the underlying corona. Below 1.2Rsun, the plasma density and temperature were derived from the Hinode/EIS data by a line-ratio method. Plasma conditions in the streamer and in the background corona above 1.2Rsun from disk center were determined by forward-modeling the emission that best fit the observational data in both EUV and white light. It was found that plasma in the streamer above 1.2Rsun is nearly isothermal, with a temperature T=1.43+-0.08 MK. The hydrostatic scale-height temperature determined from the evaluated density distribution was significantly higher (1.72+-0.08 MK), which suggests the existence of outward plasma flow along the streamer. We conclude that, inside the streamer, collisional excitation provided more than 90% of the observed EUV emission; whereas, in the background corona, the contribution of resonance scattering became comparable with that of collisions at R > 2Rsun.
description: 34 pages, 11 figures, accepted by ApJ
Supplementary Tables & Figures from Food-caching chickadees with specialized spatial cognition do not use scrounging as a stable strategy when learning a spatial task
Creators: name: Heinen, Virginia
name: Pitera, Angela
name: Sonnenberg, Benjamin
name: Branch, Carrie L.
name: Benedict, Lauren
name: Welklin, Joseph
name: Whitenfack, Lauren
name: Bridge, Eli
name: Pravosudov, Vladimir
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology
subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Additional tables and figures referenced in the main text.
Analysis And Improvement of Pairing-Free Certificate-Less Two-Party Authenticated Key Agreement Protocol For Grid Computing
Creators: name: Farouk, Amr
name: Fouad, Mohamed M.
name: Abdelhafez, Ahmed A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The predominant grid authentication mechanisms use public key infrastructure (PKI). Nonetheless, certificate-less public key cryptography (CL-PKC) has several advantages that seem to well align with the demands of grid computing. Security and efficiency are the main objectives of grid authentication protocols. Unfortunately, certificate-less authenticated key agreement protocols rely on the bilinear pairing, that is extremely computational expensive. In this paper, we analyze the recently secure certificateless key agreement protocols without pairing. We then propose a novel grid pairing-free certificate-less two-party authenticated key agreement (GPC-AKA) protocol, providing a more lightweight key management approach for grid users. We also show, a GPC-AKA security protocol proof using formal automated security analysis Sycther tool.
description: 14 pages
title: Η  επίδραση των μέσων κοινωνικής δικτύωσης στο ξενοδοχειακό κλάδο
title: The impact of social media in hospitality industry
Creators: name: Τζαγκαρακη Μαρια
Publisher: name: Technical University of Crete
Year: 2023

description: Η έρευνα διερευνά την επιρροή των Μέσων Κοινωνικής Δικτύωσης στο κλάδο του τουρισμού. Συγκεκριμένα, πραγματοποιήθηκε ποσοτική έρευνα σε μορφή ερωτηματολογίων. Συμμετείχαν συνολικά 100 καταλύματα σε κατηγορίες 3, 4, 5 αστέρων, boutique hotel & πολυτελείς παραθεριστικές κατοικίες (βίλες), στους τέσσερις νομούς της Κρήτης.
Η έρευνα εξετάζει την επίδραση του Facebook, Instagram, Viber, What´s up, LinkedIn , Youtube & Tik Tok σε δύο σημεία, στην αύξηση των κρατήσεων και την αναγνωρισιμότητα των καταλυμάτων.
description: The research investigates the impact of Social Media in the tourism industry. Specifically, a quantitative survey was carried out in the form of questionnaires. A total of 100 accommodations in 3, 4, 5 star categories, boutique hotels & luxury holiday homes (villas) participated, in the four prefectures of Crete.
The research examines the effect of Facebook, Instagram, Viber, What's up, LinkedIn, Youtube & Tik Tok on two points, on the increase of bookings and awareness of accommodations.
Magnetically driven quantum heat engine
Creators: name: Muñoz, Enrique
name: Peña, Francisco J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We studied the efficiency of two different schemes for a magnetically driven quantum heat engine, by considering as the working substance a single nonrelativistic particle trapped in a cylindrical potential well, in the presence of an external magnetic field. The first scheme is a cycle, composed of two adiabatic and two isoenergetic reversible trajectories in configuration space. The trajectories are driven by a quasistatic modulation of the external magnetic-field intensity. The second scheme is a variant of the former, where the isoenergetic trajectories are replaced by isothermal ones, along which the system is in contact with macroscopic thermostats. This second scheme constitutes a quantum analog of the classical Carnot cycle.
description: arXiv admin note: text overlap with arXiv:1207.6149
Topological and magnetic phases with strong spin-orbit coupling on the hyperhoneycomb lattice
Creators: name: Lee, Eric Kin-Ho
name: Bhattacharjee, Subhro
name: Hwang, Kyusung
name: Kim, Heung-Sik
name: Jin, Hosub
name: Kim, Yong Baek
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the general phase diagram of correlated electrons for iridium-based (Ir) compounds on the hyperhoneycomb lattice---a crystal structure where the Ir$^{4+}$ ions form a three-dimensional network with three-fold coordination recently realized in the $β$-Li${}_{2}$IrO${}_{3}$ compound. Using a combination of microscopic derivations, symmetry analysis, and density functional calculations, we determine the general model for the electrons occupying the $j_{\text{eff}}=1/2$ orbitals at the Ir$^{4+}$ sites. In the non-interacting limit, we find that this model allows for both topological and trivial electronic band insulators along with metallic states. The effect of Hubbard-type electron-electron repulsion on the above electronic structure in stabilizing $\mathbf{q}=\mathbf{0}$ magnetic order reveals a phase diagram with continuous phase transition between a topological band insulator and a Neel ordered magnetic insulator.
description: 11 pages, 7 figures
Using a model for telluric absorption in full-spectrum fits
Creators: name: Husser, Tim-Oliver
name: Ulbrich, Kathrin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The typical approach for removing telluric absorption lines from a science spectrum is to divide it by the spectrum of a standard star of spectral type A or B observed close in time and airmass. We present a new method, where we use a model for the transmission of the Earth's atmosphere in a full-spectrum fit, which determines the parameters for the stellar and Earth's atmosphere simultaneously. This eliminates the need of a standard star completely.
description: 4 pages, 3 figures, International Workshop on Stellar Spectral Libraries 2013
Herschel observations of Extra-Ordinary Sources: H2S as a Probe of Dense Gas and Possibly Hidden Luminosity Toward the Orion KL Hot Core
Creators: name: Crockett, N. R.
name: Bergin, E. A.
name: Neill, J. L.
name: Black, J. H.
name: Blake, G. A.
name: Kleshcheva, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present Herschel/HIFI observations of the light hydride H$_{2}$S obtained from the full spectral scan of the Orion Kleinmann-Low nebula (Orion KL) taken as part of the HEXOS GT key program. In total, we observe 52, 24, and 8 unblended or slightly blended features from H$_{2}$$^{32}$S, H$_{2}$$^{34}$S, and H$_{2}$$^{33}$S, respectively. We only analyze emission from the so called hot core, but emission from the plateau, extended ridge, and/or compact ridge are also detected. Rotation diagrams for ortho and para H$_{2}$S follow straight lines given the uncertainties and yield T$_{\rm rot}$=141$\pm$12 K. This indicates H$_{2}$S is in LTE and is well characterized by a single kinetic temperature or an intense far-IR radiation field is redistributing the population to produce the observed trend. We argue the latter scenario is more probable and find that the most highly excited states (E$_{\rm up}$>1000 K) are likely populated primarily by radiation pumping. We derive an H$_{2}$$^{32}$S column density, N$_{\rm tot}$(H$_{2}$$^{32}$S)=9.5$\pm$1.9$\times$10$^{17}$ cm$^{-2}$, gas kinetic temperature, T$_{\rm kin}$=120$\pm^{13}_{10}$ K, and constrain the H$_{2}$ volume density, n$_{H2}$>9$\times$10$^{7}$ cm$^{-3}$, for the H$_{2}$S emitting gas. These results point to an H$_{2}$S origin in markedly dense, heavily embedded gas, possibly in close proximity to a hidden self-luminous source (or sources), which are conceivably responsible for Orion KL's high luminosity. We also derive an H$_{2}$S ortho/para ratio of 1.7$\pm$0.8 and set an upper limit for HDS/H2S of <4.9$\times$10$^{-3}$.
description: 46 pages, 13 figures, 6 tables. Accepted for publication to ApJ
Wide-field 12CO (J = 1-0) Imaging of the Nearby Barred Galaxy M83 with NMA and Nobeyema 45-m telescope: Molecular Gas Kinematics and Star Formation Along the Bar
Creators: name: Hirota, Akihiko
name: Kuno, Nario
name: Baba, Junichi
name: Egusa, Fumi
name: Habe, Asao
name: Muraoka, Kazuyuki
name: Tanaka, Ayako
name: Nakanishi, Hiroyuki
name: Kawabe, Ryohei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the results of the wide-field $^{12}$CO (1--0) observations of the nearby barred galaxy M83 carried out with the Nobeyama Millimeter Array (NMA). The interferometric data are combined with the data obtained with the Nobeyama 45-m telescope to recover the total-flux. The target fields of the observations cover the molecular bar and part of the spiral arms, with a spatial resolution of ~110 pc x 260 pc. By exploiting the resolution and sensitivity to extended CO emission, the impact of the galactic structures on the molecular gas content is investigated in terms of the gas kinematics and the star formation. By inspecting the gas kinematics, the pattern speed of the bar is estimated to be 57.4 $\pm$ 2.8 km s$^{-1}$ kpc$^{-1}$, which places the corotation radius to be about 1.7 times the semi-major radius of the bar. Within the observed field, HII regions brighter than 10$^{37.6}$ erg s$^{-1}$ in Hα luminosity are found to be preferentially located downstream of the CO emitting regions. Azimuthal angular offsets between molecular gas and star forming (SF) calculated with the angular cross-correlation method confirm the trend. By comparing with a cloud orbit model based on the derived pattern speed, the angular offsets are found to be in accordance with a time delay of about 10 Myr. Finally, to test whether the arm/bar promote star formation efficiency (SFE $\equiv$ Star Formation Rate (SFR)/H$_2$ mass), SFR is derived with the diffuse-background-subtracted H{alpha} and 24μm images. The arm-to-interarm ratio of the SFE is found to lie in the range of 2 to 5, while it is ~1 if no background-removal is performed. The CO-SF offsets and the enhancement of the SFE in the arm/bar found in the inner region of M83 are in agreement with the predictions of the classical galactic shock model.
description: 21 pages, 21 figures
Lower glycolysis carries a higher flux than any biochemically possible alternative
Creators: name: Court, Steven J.
name: Waclaw, Bartlomiej
name: Allen, Rosalind J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: The universality of many pathways of core metabolism suggests a strong role for evolutionary selection, but it remains unclear whether existing pathways have been selected from a large or small set of biochemical possibilities. To address this question, we construct "in silico" all possible biochemically feasible alternatives to the trunk pathway of glycolysis and gluconeogenesis, one of the most highly conserved pathways in metabolism. We show that, even though a large number of alternative pathways exist, the alternatives carry lower flux than the real pathway under typical physiological conditions. Alternative pathways that could potentially carry higher flux often lead to infeasible intermediate metabolite concentrations. We also find that if physiological conditions were different, different pathways could outperform those found in nature. Our results demonstrate how the rules of biochemistry restrict the alternatives that are open to evolution, and suggest that the existing trunk pathway of glycolysis and gluconeogenesis represents a maximal flux solution.
description: 9 pages, 4 figures
CEAI: CCM based Email Authorship Identification Model
Creators: name: Nizamani, Sarwat
name: Memon, Nasrullah
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper we present a model for email authorship identification (EAI) by employing a Cluster-based Classification (CCM) technique. Traditionally, stylometric features have been successfully employed in various authorship analysis tasks; we extend the traditional feature-set to include some more interesting and effective features for email authorship identification (e.g. the last punctuation mark used in an email, the tendency of an author to use capitalization at the start of an email, or the punctuation after a greeting or farewell). We also included Info Gain feature selection based content features. It is observed that the use of such features in the authorship identification process has a positive impact on the accuracy of the authorship identification task. We performed experiments to justify our arguments and compared the results with other base line models. Experimental results reveal that the proposed CCM-based email authorship identification model, along with the proposed feature set, outperforms the state-of-the-art support vector machine (SVM)-based models, as well as the models proposed by Iqbal et al. [1, 2]. The proposed model attains an accuracy rate of 94% for 10 authors, 89% for 25 authors, and 81% for 50 authors, respectively on Enron dataset, while 89.5% accuracy has been achieved on authors' constructed real email dataset. The results on Enron dataset have been achieved on quite a large number of authors as compared to the models proposed by Iqbal et al. [1, 2].
Some Implications of inverse-Compton Scattering of Hot Cocoon Radiation by relativistic jets in Gamma-Ray Bursts
Creators: name: Kumar, Pawan
name: Smoot, George F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Long Gamma-Ray Bursts (GRB) relativistic jets are surrounded by hot cocoons which confine jets during their punch out from the progenitor star. These cocoons are copious sources of X-ray photons that can be and are inverse-Compton (IC) scattered to MeV--GeV energies by electrons in the relativistic jet. We provide detailed estimates for IC flux resulting from various interactions between X-ray photons and the relativistic jet, and describe what we can learn about GRB jets and progenitor stars from the detection (or an upper limit) of these IC scattered photons.
description: 26 pages 7 figures (comments most welcome)
Star Cluster Formation and Feedback
Creators: name: Krumholz, Mark R.
name: Bate, Matthew R.
name: Arce, Hector G.
name: Dale, James E.
name: Gutermuth, Robert
name: Klein, Richard I.
name: Li, Zhi-Yun
name: Nakamura, Fumitaka
name: Zhang, Qizhou
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Stars do not generally form in isolation. Instead, they form in clusters, and in these clustered environments newborn stars can have profound effects on one another and on their parent gas clouds. Feedback from clustered stars is almost certainly responsible for a number of otherwise puzzling facts about star formation: that it is an inefficient process that proceeds slowly when averaged over galactic scales; that most stars disperse from their birth sites and dissolve into the galactic field over timescales $\ll 1$ Gyr; and that newborn stars follow an initial mass function (IMF) with a distinct peak in the range $0.1 - 1$ $M_\odot$, rather than an IMF dominated by brown dwarfs. In this review we summarize current observational constraints and theoretical models for the complex interplay between clustered star formation and feedback.
description: 24 pages, 7 figures, accepted for publication as a chapter in Protostars and Planets VI, University of Arizona Press (2014), eds. H. Beuther, R. Klessen, C. Dullemond, Th. Henning
Long-term photometry of the eclipsing dwarf nova V893 Scorpii: Orbital period, oscillations, and a possible giant planet
Creators: name: Bruch, Albert
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The cataclysmic variable V893 Sco is an eclipsing dwarf nova which, apart from outbursts with comparatively low amplitudes, exhibits a particularly strong variability during quiescence on timescales of days to seconds.The present study aims to update the outdated orbital ephemerides published previously, to investigate deviations from linear ephemerides, and to characterize non-random brightness variations in a range of timescales. Light curves of V893 Sco were observed on 39 nights, spanning a total time base of about 14 years. They contain 114 eclipses which were used to significantly improve the precision of the orbital period and to study long-term variations of the time of revolution. Oscillations and similar brightness variations were studied with Fourier techniques in the individual light curves. The orbital period exhibits long-term variations with a cycle time of 10.2 years. They can be interpreted as a light travel time effect caused by the presence of a giant planet with approximately 9.5 Jupiter masses in a 4.5 AU orbit around V893 Sco. On some nights transient semi-periodic variations on timescales of several minutes can be seen which may be identified as quasi-periodic oscillations. However, it is difficult to distinguish whether they are caused by real physical mechanisms or if they are the effect of an accidental superposition of unrelated flickering flares. Simulations to investigate this question are presented.
description: Accepted for publication in Astronomy & Astrophysics (acceptance date: 2014, March 31)
The feedback of massive stars on interstellar astrochemical processes
Creators: name: De Becker, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Astrochemistry is a discipline that studies physico-chemical processes in astrophysical environments. Such environments are characterized by conditions that are substantially different from those existing in usual chemical laboratories. Models which aim to explain the formation of molecular species in interstellar environments must take into account various factors, including many that are directly, or indirectly related to the populations of massive stars in galaxies. The aim of this paper is to review the influence of massive stars, whatever their evolution stage, on the physico-chemical processes at work in interstellar environments. These influences include the ultraviolet radiation field, the production of high energy particles, the synthesis of radionuclides and the formation of shocks that permeate the interstellar medium.
description: 9 pages, 1 figure, Accepted for publication in Astrophysics and Space Science
Group Theoretical Analysis of Quasicrystallography from Projections of Higher Dimensional Lattices Bn
Creators: name: Koca, Mehmet
name: Koca, Nazife Ozdes
name: Koc, Ramazan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences
subject: 20, 06

description: A group theoretical discussion on the hypercubic lattice described by the affine Coxeter-Weyl group Wa(Bn) has been presented. When the lattice is projected onto the Coxeter plane it is noted that the maximal dihedral subgroup Dh of W(Bn) with h = 2n representing the Coxeter number describes the h-fold symmetric quasicrystallography. Higher dimensional cubic lattices are explicitly constructed for n = 4, 5, 6. Their rank 3 Coxeter subgroups and maximal dihedral subgroups are identified. It has been explicitly shown that when their Voronoi cells are decomposed under the respective rank 3 subgroups W(A3),W(H2) x W(A1) and W(H3) one obtains the rhombic dodecahedron, rhombic icosahedron and rhombic triacontahedron respectively. Projection of the lattice B4 onto the Coxeter plane represents quasicrystal structures with 8-fold symmetry. The B5 lattice is used to describe the quasicrystals with both 5-fold and 10-fold symmetries. The lattice B6 can describe a 12-fold symmetric quasicrystal as well as a 3D icosahedral quasicrystal depending on the choice of subspace of projections. The novel structures from the projected sets of lattice points are compatible with the available experimental data.
description: 24 pages, 17 figures