cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Castles fall from inside: Evidence for dominant internal photo-catalytic mechanisms during treatment of Saccharomyces cerevisiae by photo-Fenton at near-neutral pH
Creators: name: Giannakis, Stefanos
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 401199
subject: Environmental engineering not elsewhere classified

description: In this work, the antimicrobial effects of the photo-Fenton process on yeast cells were tested (Saccharomyces cerevisiae), an essential eukaryotic unicellular model of living cells. Near-neutral pH was used in all studies, while iron sulfate and iron citrate were evaluated as iron sources during S. cerevisiae photo-Fenton inactivation under simulated solar light (hv/H2O2/Fe). The following indicators were monitored to decrypt the mechanism of yeast inactivation by neutral photo-Fenton process: cell viability by flow cytometry, damage at DNA level, as well as intracellular and extracellular proteins, assessed by gel electrophoresis. A significant loss of cultivability was monitored through the application of all the different photo-Fenton systems, attributed to the oxidative stresses applied. The mechanisms involved were the homogeneous action of dissolved iron and the heterogeneous action mode of iron oxides. The DNA and protein analyses indicated drastic intracellular damages, while external macromolecules (cell wall and membrane proteins) showed limited degradation. This marked internal photocatalytic processes as the main inactivation mechanism in S. cerevisiae. Different pathways are proposed, forming a general process of inactivation by the near-neutral photo-Fenton systems.
Detection potential for the diffuse supernova neutrino background in the large liquid-scintillator detector LENA
Creators: name: Wurm, M.
name: von Feilitzsch, F.
name: Goeger-Neff, M.
name: Hochmuth, K. A.
name: Undagoitia, T. Marrodan
name: Oberauer, L.
name: Potzel, W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The large-volume liquid-scintillator detector LENA (Low Energy Neutrino Astronomy) will provide high-grade background discrimination and enable the detection of diffuse supernova neutrinos (DSN) in an almost background-free energy window from ~10 to 25 MeV. Within ten years of exposure, it will be possible to derive significant constraints on both core-collapse supernova models and the supernova rate in the near universe up to redshifts z<2.
description: 11 pages, 8 figures. accepted for publication in Phys. Rev. D. accepted for publication in Phys. Rev. D
Η εγκατάσταση των νέων γεωργών στην Ελληνική γεωργία: η περίπτωση του Δήμου Βασιλικών Ν.Θεσσαλονίκης
Creators: name: Αρχοντής, Ευριπίδης Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Νέοι γεωργοί
Εγκατάσταση
Διαδοχή
New farmers
Establishment

description: Η ηλικιακή σύνθεση του πληθυσμού είναι ένας από του πλέον σημαντικούς παράγοντες ο οποίος επηρεάζει την ανάπτυξη των διάφορων τομέων οικονομικής δραστηριότητας και κατ’ επέκταση την οικονομία μιας χώρας στο σύνολό της. Οι νέοι σε ηλικία άνθρωποι εγκαταλείπουν τις αγροτικές περιοχές οι οποίες κυριαρχούνται πλέον από ηλικιωμένα άτομα. Η εγκατάσταση των νέων γεωργών κατέχει πρωταρχικό ρόλο στην εξέλιξη του γεωργικού τομέα, καθώς καθορίζει την ανανέωση και την περαιτέρω ανάπτυξη του. Το Πρόγραμμα εγκατάστασης νέων αγροτών έχει ως αντικειμενικούς στόχους αφ’ ενός την ανανέωση της ηλικιακής σύνθεσης του αγροτικού πληθυσμού, αφ’ ετέρου τη βελτίωση της διάρθρωσης των γεωργικών εκμεταλλεύσεων. Σκοπός της παρούσης εργασίας είναι να διερευνήσει τα χαρακτηριστικά των νέων γεωργών και των εκμεταλλεύσεων τους και τις στάσεις τους απέναντι στο γεωργικό επάγγελμα. Τα αποτελέσματα της έρευνας έδειξαν ότι στο Δήμο Βασιλικών υπάρχουν νέοι γεωργοί οι οποίοι επιθυμούν να παραμείνουν στον τόπο τους και να ασχοληθούν επιχειρηματικά με το γεωργικό επάγγελμα. Θα πρέπει όμως οι πολιτικές που εφαρμόζονται να αφουγκράζονται τις ανάγκες των νέων γεωργών και να είναι προσαρμοσμένες στα ιδιαίτερα χαρακτηριστικά του κάθε τόπου.
description: The age structure of the population is one of the most important parameters that influences the development of various sectors of the economic activity and by consequence the economy of the country in its entirety. More and more young people nowadays the agricultural areas which, in turn, are inundated by elderly ones. The settlement of new farmers sustains a major role in the evolution of the agricultural sector since it determines its renewal and its further progress. The Program of the new farmers’ settlement has the following two objective targets; on the one hand, the revival of the age structure of the agricultural population and on the other hand the enhancement of the structure of the agricultural exploitations. The purpose of the present paper is to investigate the characteristics of the new farmers and their exploitations as well as their views towards the farming profession. The results of the survey showed that in the Municipality of Vassilika there are new farmers that wish to remain in their place and deal with the farming profession on a business level. However, the policies implemented by the governments should take seriously under consideration the needs of the new farmers and be adapted to the special characteristics of each region.
Additional file 4 of Exploring Carolingian and Romanesque cycles: a study of the detached wall paintings from the Church of St. Johann in Müstair
Creators: name: Lombardo, Tiziana
name: Caroselli, Marta
name: Martinucci, Camilla
name: Hildbrand, Erwin
name: Moretti, Patrizia
name: Cassitti, Patrick
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Cell Biology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Supplementary Material 4.
Non-Hermitian Fabry-Perot Resonances in a PT-symmetric system
Creators: name: Shobe, Ken
name: Kuramoto, Keiichi
name: Imura, Ken-Ichiro
name: Hatano, Naomichi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In non-Hermitian scattering problems the behavior of the transmission probability is very different from its Hermitian counterpart; it can exceed unity or even be divergent, since the non-Hermiticity can add or remove the probability to and from the scattering system. In the present paper, we consider the scattering problem of a PT-symmetric potential and find a counter-intuitive behavior. In the usual PT-symmetric non-Hermitian system, we would typically find stationary semi-Hermitian dynamics in a regime of weak non-Hermiticity but observe instability once the non-Hermiticity goes beyond an exceptional point. Here, in contrast, the behavior of the transmission probability is strongly non-Hermitian in the regime of weak non-Hermiticity with divergent peaks, while it is superficially Hermitian in the regime of strong non-Hermiticity, recovering the conventional Fabry-Perot-type peak structure. We show that the unitarity of the S-matrix is generally broken in both of the regimes, but is recovered in the limit of infinitely strong non-Hermiticity.
description: 15 pages, 8 figures (15 panels). Supplementary material is available at http://hatano-lab.iis.u-tokyo.ac.jp/hatano/FPR2020/
Transition-Event Durations in One Dimensional Activated Processes
Creators: name: Zhang, Bin W.
name: Jasnow, David
name: Zuckerman, Daniel M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Despite their importance in activated processes, transition-event durations -- which are much shorter than first passage times -- have not received a complete theoretical treatment. We therefore study the distribution of durations of transition events over a barrier in a one-dimensional system undergoing over-damped Langevin dynamics.
description: 39 pages, 11 figures
Plasmodium falciparum response to artemisinin combination therapies in children in Mutengene (Forest Littoral) and Garoua (Sahel-Savanna) regions of varying malaria transmission in Cameroon
Creators: name: Akindeh  Nji
name: Ali, Innocent M.
name: Evehe  Marie-Solange
name: Heumann, Christian
name: Mansmann, Ulrich
name: Guenter  Froeschl
name: Mbacham, Wilfred F.
Publisher: name: AAS Open Research
Year: 2019

description: Objective: Drug resistance is a major drawback to the control of malaria. Monitoring changes in parasite clearance following treatment with artemisinin-based combination therapy and investigating drivers of delayed parasite clearance is key to containment strategies. The aim of this study was to describe in vivo parasite clearance in uncomplicated malaria patients following treatment with artemisinin combination therapies (ACTs).
Methods: We first investigated the comparability of parasite density between the two ecological regions (360 patients per region through log transformed parasite counts. We use a discrete time survival model to investigate factors that might play a role in parasite clearance.
Results: The probability of clearing parasites within 24 hours after treatment were higher for Garoua when compared to Mutengene (a region with a different ecology). After two days of treatment the conditional probability of clearing parasites given that they were not cleared on day one was 76.7% and 96.6% (children between 6-59 months) and 83.1% and 93.5% (children between 60-120 months) for Mutengene and Garoua respectively.
Conclusion: Our model showed a delay in parasite clearance in Mutengene compared to Garoua among children between 6-120 months treated with ACTs. There is need for further investigations of the differential response.
Regulating Star Formation in Nearby Dusty Galaxies: Low Photoelectric Efficiencies in the Most Compact Systems
Creators: name: McKinney, Jed
name: Armus, Lee
name: Pope, Alexandra
name: Diaz-Santos, Tanio
name: Charmandaris, Vassilis
name: Inami, Hanae
name: Song, Yiqing
name: Evans, Aaron
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Star formation in galaxies is regulated by the heating and cooling in the interstellar medium. In particular, the processing of molecular gas into stars will depend strongly on the ratio of gas heating to gas cooling in the neutral gas around sites of recent star-formation. In this work, we combine mid-infrared (mid-IR) observations of Polycyclic Aromatic Hydrocarbons (PAHs), the dominant heating mechanism of gas in the interstellar medium (ISM), with [C II], [O I], and [Si II] fine-structure emission, the strongest cooling channels in dense, neutral gas. The ratio of IR cooling line emission to PAH emission measures the photoelectric efficiency, a property of the ISM which dictates how much energy carried by ultraviolet photons gets transferred into the gas. We find that star-forming, IR luminous galaxies in the Great Observatories All-Sky LIRG Survey (GOALS) with high IR surface densities have low photoelectric efficiencies. These systems also have, on average, higher ratios of radiation field strength to gas densities, and larger average dust grain size distributions. The data support a scenario in which the most compact galaxies have more young star-forming regions per unit area, which exhibit less efficient gas heating. These conditions may be more common at high-z, and may help explain the higher star-formation rates at cosmic noon. We make predictions on how this can be investigated with JWST.
description: 17 pages, 8 figures, 2 tables, accepted for publication in ApJ
Μάθηση μέσω κινητών συσκευών:
Creators: name: Μιχαήλ, Μιχαήλ Πελοπίδα
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: κινητές συσκευές
εποικοδομισμός
μάθηση και κινητές συσκευές
mobile learning
m-school
u-learning

description: Στην εργασία αυτή αναφερόμαστε στη μάθηση μέσω κινητών συσκευών (ΜΚΣ). Γενικά υπάρχουν αμέτρητοι τρόποι μάθησης, καθώς οι άνθρωποι βρίσκονται σε κίνηση. Κατά συνέπεια ο ορισμός της ΜΚΣ είναι διττός μιας και λαβαίνει υπόψη του τις δυο διαστάσεις του mobile learning. Την τεχνολογία αλλά και τον χρήστη. Στο θεωρητικό μέρος της εργασίας, έγινε προσπάθεια να γίνει η πλήρης χαρτογράφηση του τοπίου της μάθησης μέσω κινητών συσκευών, όπως αυτή περιγράφεται στη διεθνή βιβλιογραφία μέχρι και σήμερα. Στο πρακτικό της μέρος, αντικείμενο της παρούσας εργασίας αποτέλεσε η ανάπτυξη κατάλληλου σεναρίου εφαρμογής της ΜΚΣ, καθώς και των κατάλληλων τεχνολογιών, έτσι ώστε να προσεγγίσει και να προτείνει λύση σε προβλήματα της blended learning αλλά και της παραδοσιακής μάθησης μέσα στην τάξη. Στόχος της εργασίας είναι να αναδείξει το ρόλο της κινητής συσκευής περισσότερο ως υποστηρικτικό μέσο σε μια καλά δομημένη εκπαιδευτική εφαρμογή και συγκεκριμένα στο μάθημα της Φυσικής του Γενικού Λυκείου στην Ελλάδα. Πρέπει να σημειωθεί πως δεν υπάρχει ακόμη μια σαφώς δομημένη θεωρία, που να εξηγεί πλήρως πως μπορεί η άτυπη μάθηση μέσω των κινητών συσκευών να βοηθήσει στη μάθηση. Έτσι η προσπάθεια εστίασε περισσότερο σε μια formal προσέγγιση και αποτελεί μια πρόταση της χρήσης της κινητής τεχνολογίας, ως υποστηρικτικής του μαθήματος που γίνεται στην τάξη.
description: In this work we refer to learning via mobile appliances (MLA). In general there are exist innumerable cases of learning while the persons are found in movement. In consequence the definition of [MKS] is double one and takes into his consideration the two dimensions of mobile learning. The technology but also the user. In the theoretical part of work, became effort to have the complete mapping of landscape of learning via mobile appliances, as this is described in the international bibliography until today. In the practical part of the present work constituted the growth of suitable script of application of mobile learning as well as suitable technologies, so to approach and propose solutions, in problems of blended learning, but also the traditional learning that takes place in school classroom. The aim of this work is to find out the role of mobile appliance more as supporting means in a well structured educational application and concretely in the course of Physics of General Lyceum in Greece. It should be marked that does not exist still a certain theory that would explain completely how can the informal learning via the mobile appliances help in the learning. Thus the effort focused more in formal approach and it constitutes a proposal of use of mobile technology as supporting the course that will become in a typical classroom.
Molecular Gas in the Low Metallicity, Star Forming Dwarf IC 10
Creators: name: Leroy, A.
name: Bolatto, A. D.
name: Walter, F.
name: Blitz, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a complete survey of CO 1->0 emission in the Local Group dwarf irregular IC 10. The survey, conducted with the BIMA interferometer, covers the stellar disk and a large fraction of the extended HI envelope with the sensitivity and resolution necessary to detect individual giant molecular clouds (GMCs) at the distance of IC 10 (950 kpc). We find 16 clouds with a total CO luminosity of 1 x 10^6 K km s^-1 pc^2, equivalent to 4 x 10^6 Msun of molecular gas using the Galactic CO-to-H2 conversion factor. Observations with the ARO 12m find that BIMA may resolve out as much as 50% of the CO emission, and we estimate the total CO luminosity as 2.2 x 10^6 K km s^-1 pc^2. We measure the properties of 14 GMCs from high resolution OVRO data. These clouds are very similar to Galactic GMCs in their sizes, line widths, luminosities, and CO-to-H2 conversion factors despite the low metallicity of IC 10 (Z ~ 1/5 Zsun). Comparing the BIMA survey to the atomic gas and stellar content of IC 10 we find that most of the CO emission is coincident with high surface density HI. IC 10 displays a much higher star formation rate per unit molecular (H2) or total (HI+H2) gas than most galaxies. This could be a real difference or may be an evolutionary effect - the star formation rate may have been higher in the recent past.
description: 21 pages, 14 figures, Accepted to ApJ
IC10~X-1/NGC300~X-1: the very immediate progenitors of BH-BH binaries
Creators: name: Bulik, Tomasz
name: Belczynski, Krzysztof
name: Prestwich, Andrea
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the future evolution of two extragalactic X-ray binaries: IC10 X-1 and NGC300 X-1. Each of them consists of a high mass BH ($\sim 20-30 \msun$) accreting from a massive WR star companion ($\gtrsim 20 \msun$), and both are located in low metallicity galaxies. We analyze the current state of the systems and demonstrate that both systems will very quickly ($\lesssim 0.3$ Myr) form close BH-BH binaries with the short coalescence time ($\sim 3$ Gyr) and large chirp mass ($\sim 15 \msun$). The formation of BH-BH system seems unavoidable, as {\em (i)} WR companions are well within their Roche lobes and they do not expand so no Roche lobe overflow is expected, {\em (ii)} even intense WR wind mass loss does not remove sufficient mass to prohibit the formation of the second BH, {\em (ii)} even if BH receives the large natal kick, the systems are very closely bound and are almost impossible to disrupt. As there are two such immediate BH-BH progenitor systems within 2 Mpc and as the current gravitational wave instruments LIGO/VIRGO (initial stage) can detect such massive BH-BH mergers out to $\sim 200$ Mpc, the empirically estimated detection rate of such inspirals is $R=3.36^{+8.29}_{-2.92}$ at the 99% confidence level. If there is no detection in the current LIGO/VIRGO data (unreleased year of $s6$ run), the existence of these two massive BH systems poses an interesting challenge. Either the gravitational radiation search is not sensitive to massive inspirals or there is some fundamental misunderstanding of stellar evolution physics leading directly to the formation of BH-BH binaries.
description: 9 pages, resubmitted to ApJ with major extension
Factors influencing maternal deaths surveillance and response to avert maternal deaths at a National Referral and Teaching Hospital in Uganda: A qualitative study
Creators: name: Namagembe, Imelda
name: C E  Aiken
name: J K.  Byamugisha
name: N  Kiwanuka
name: A   Nakimuli
Publisher: name: AAS Open Research
Year: 2019

description: Objective: To understand barriers & facilitators to the maternal death review and response process to reduce maternal deaths at a National Referral and Teaching Hospital in Uganda.
Methods: Discussions were held with health care providers and administrators at different levels were conducted to provide answers to the challenges encountered in scaling up the process of learning from the stories of the deceased mothers and how best to overcome them.
Twenty six in-depth interviews and two focus group discussions have been conducted.
Results: Preliminary results show that all respondents were aware the process of reviewing maternal deaths ( MDSR) and scored it as either very useful or useful.
They proposed that conditions that would facilitate the process are focused training in MDSR, dedicated Heads of departments and health workers.
Factors that hinder performance MDSR: Fear of criminal charges to health worker in case of a maternal death, inadequate skills and failure for the Health System /Government to provide emergency supplies or not implementing changes and many deaths.
Conclusion: All participants agreed that review of the maternal deaths is a very useful and propose regular training of health workers, dedicated leaders and health workers.
However, strategies to remove stated barriers are urgently needed for success.

Supported by THRiVE-2 Grant 
The quantum Hall effect in graphene samples and the relativistic Dirac effective action
Creators: name: Beneventano, C. G.
name: Giacconi, Paola
name: Santangelo, E. M.
name: Soldati, Roberto
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the Euclidean effective action per unit area and the charge density for a Dirac field in a two--dimensional spatial region, in the presence of a uniform magnetic field perpendicular to the 2D--plane, at finite temperature and density. In the limit of zero temperature we reproduce, after performing an adequate Lorentz boost, the Hall conductivity measured for different kinds of graphene samples, depending upon the phase choice in the fermionic determinant.
description: Conclusions extended. References added. 9 pages. 1 figure
A trailscape in the barrancas of Central Veracruz : land use and transportation in sloping terrain
Creators: name: Millette, Daniel M.
Publisher: name: University of British Columbia
Year: 2009

description: The canyons, or barrancas of Central Veracruz remain as major voids in the region's cultural history. The inherited view of the barrancas as difficult in terms of movement and marginal in terms of potential for subsistence is no longer adequate. The region's inhabitants organize themselves to carry out construction and engineering projects in order to maintain trail links to a variety of local resources and activities ranging from cultivation to less apparent social objectives. Interaction between people in social, political and ritual contexts is made possible. The trails are utilized locally and their reach is extended with the road network, particularly as accessibility to the regional economy becomes necessary; adding trails to the region's transportation network results in a doubly interconnected transportation facility. The trail system thus provides a basis for adaptive strategies utilized to render local physiographic "limitations" less forbidding. Whether with the cultivation of coffee or cane, or the persisting traditional cropping strategies, land typically considered marginal is successfully exploited. The trails not only form part of the economic basis for the region's subsistence economy, but they are consequential in terms of land use strategies. Further, they are primal in terms of the region's transportation facility; this primal characteristic is confirmed when we re-evaluate the region's transportation history.
Large Non-Gaussianities in Single Field Inflation
Creators: name: Chen, Xingang
name: Easther, Richard
name: Lim, Eugene A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the 3-point correlation function for a general model of inflation driven by a single, minimally coupled scalar field. Our approach is based on the numerical evaluation of both the perturbation equations and the integrals which contribute to the 3-point function. Consequently, we can analyze models where the potential has a "feature", in the vicinity of which the slow roll parameters may take on large, transient values. This introduces both scale and shape dependent non-Gaussianities into the primordial perturbations. As an example of our methodology, we examine the ``step'' potentials which have been invoked to improve the fit to the glitch in the $$ $C_l$ for $l \sim 30$, present in both the one and three year WMAP data sets. We show that for the typical parameter values, the non-Gaussianities associated with the step are far larger than those in standard slow roll inflation, and may even be within reach of a next generation CMB experiment such as Planck. More generally, we use this example to explain that while adding features to potential can improve the fit to the 2-point function, these are generically associated with a greatly enhanced signal at the 3-point level. Moreover, this 3-point signal will have a very nontrivial shape and scale dependence, which is correlated with the form of the 2-point function, and may thus lead to a consistency check on the models of inflation with non-smooth potentials.
description: 23 pages JHEP-style, 7 Figures. Updated with improved results. Accepted for publication by JCAP
Microscopic electronic structure tomography of Rydberg macrodimers
Creators: name: Hollerith, Simon
name: Rui, Jun
name: Rubio-Abadal, Antonio
name: Srakaew, Kritsana
name: Wei, David
name: Zeiher, Johannes
name: Gross, Christian
name: Bloch, Immanuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Precise control and study of molecules is challenging due to the variety of internal degrees of freedom and local coordinates that are typically not controlled in an experiment. Employing quantum gas microscopy to position and resolve the atoms in Rydberg macrodimer states solves almost all of these challenges and enables unique access to the molecular frame. Here, we demonstrate the power of this approach and present first photoassociation studies for different molecular symmetries in which the molecular orientation relative to an applied magnetic field, the polarization of the excitation light and the initial atomic state are fully controlled. The observed characteristic dependencies allow for an electronic structure tomography of the molecular state. We additionally observe an orientation-dependent Zeeman shift and reveal a significant influence on it caused by the hyperfine interaction of the macrodimer state. Finally, we demonstrate controlled engineering of the electrostatic binding potential by opening a gap in the energetic vicinity of two crossing pair potentials.
description: 12 pages + 8 figures
Additional file 5 of Exploring Carolingian and Romanesque cycles: a study of the detached wall paintings from the Church of St. Johann in Müstair
Creators: name: Lombardo, Tiziana
name: Caroselli, Marta
name: Martinucci, Camilla
name: Hildbrand, Erwin
name: Moretti, Patrizia
name: Cassitti, Patrick
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Cell Biology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Supplementary Material 5.
Σύνθεση και μελέτη μικροταινιακής κεραίας για φορητό υπολογιστή:
Creators: name: Αλεξανδρόπουλος, Νικόλαος Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Μικροταινιακή κεραία
Δακτυλιοειδείς τομείς
Φορητός υπολογιστής
Microstrip antenna
Annular sectors
Laptop

description: αντικείμενο της εργασίας αποτελεί η σχεδίαση, κατασκευή και μελέτη τυπωμένης μικροταινιακής κεραίας για φορητό υπολογιστή. η κεραία υλοποιήθηκε με σύνθεση δακτυλιοειδών τυπωμένων στοιχείων και λειτουργεί στις συχνότητες ασύρματων δικτύων wifi. μελετήθηκαν τα λειτουργικά χαρακτηριστικά της μετά την ενσωμάτωση της σε φορητό υπολογιστή σαν συνάρτηση της θέσης της στο σώμα του υπολογιστή και των δομικών χαρακτηριστικών της. η εργασία περιλαμβάνει: α) σύντομη αναφορά στα βασικά χαρακτηριστικά των μικροταινιακών κεραιών που χρησιμοποιούνται σε φορητούς υπολογιστές, β) θεωρητική ανάλυση της μεθόδου των πεπερασμένων διαφορών στο πεδίο του χρόνου (fdtd) που χρησιμοποιήθηκε για την επίλυση των χαρακτηριστικών εξισώσεων του πεδίου ακτινοβολίας της μελετώμενης κεραίας, γ) θεωρητικό προσδιορισμό της γεωμετρίας των δακτυλιοειδών τομέων (annular sectors) για τη σύνθεση της κεραίας που μελετήθηκε, δ) αναλυτική παρουσίαση της ανάπτυξης της κεραίας στο περιβάλλον πρόγραμμα της προσομοίωσης semcad x, ε) αποτελέσματα από την πειραματική μελέτη των χαρακτηριστικών της κεραίας και τελικά συμπεράσματα για τη βέλτιστη θέση τοποθέτησης της κεραίας στην πλάτης της οθόνης ενός φορητού υπολογιστή για αποτελεσματική χρήση της σε εφαρμογές wifi.
description: this postgraduate dissertation aims at the analysis and the design of a microstrip antenna with annular sectors, which is able to function the frequency range wireless networks, providing high performance. especially, an investigation when the antenna was mounted at the back side of the screen of a laptop was performed and conclusions were drawn about the performance of the antenna mounted on different positions at the back side of the screen. firstly, a short reference on the theory of characteristics of microstrips antennas was made and some modern types of antennas used in laptop applications wifi, were reported. a theoretical analysis of the fdtd method, which was used to solve numerically the problem, followed. then, the theoretical allocation of the geometry of annular sectors, which were used to form the antenna, was analyzed. in addition, an antenna with annular sectors was designed in the environment of semcad x, the numerical software employed in the simulations. in the last part of the investigation, the antenna was mounted at the back side of a laptop screen for two different positions on it and for two different viewing angles of the screen. simulation results for the above cases, were extracted and discussed. in conclusion, the results that were obtained, could reveal the most suitable position for the wifi antenna on the laptop screen, for which best performance can be achieved.
Ex vivo survival of Gambian Plasmodium falciparum isolates to Artemisinin derivatives and ACT partner drugs.
Creators: name: Haddijatou Mbye
name: J.  Okebe
name: F.  Bojang
name: A. Jawara
name: F.K  Jaiteh
name: U D'Alessandro
name: A.A Ngwa
Publisher: name: AAS Open Research
Year: 2019

description: Malaria is the most common parasitic disease worldwide and a major health concern for those living in endemic areas. Many drugs have been introduced over the past decades for the treatment of malaria which is caused by the parasite Plasmodium falciparum. These parasites however have the ability to adapt to drug pressure and eventually develop resistance. In recent years, artemisinin-based combination therapies (ACTs) were developed and are used as the first line treatment for uncomplicated malaria. Scale up of treatments with these drugs impose pressure on the parasite population that may drive selection for resistant strains. Ninety-two P. falciparum isolates were collected over 2 transmission seasons (2017 and 2018) from participants confirmed with uncomplicated malaria. In vitro assays; parasite survival assay (PSA) and ring-stage survival assay (RSA) were carried out to test the effectiveness of Dihydroartemisinin and Lumefantrine used in combination in The Gambia. With both drug assays, more than 15% of isolates survived exposure to both Dihydroartemisinin and Lumefantrine. This suggests reduced in vitro sensitivity of Gambian isolates to the drugs which could consequently result in the selection of resistant parasites. Our results call for continuous and rigorous surveillance of antimalarial sensitivity to sustain the useful lifespan of currently employed ACTs.
Microelectromechanical deformable mirror development for high-contrast imaging, part 1: miniaturized, flight-capable control electronics
Creators: name: Bendek, Eduardo
name: Ruane, Garreth
name: Prada, Camilo Mejia
name: Mendillo, Christopher B.
name: Riggs, A. J. Eldorado
name: Serabyn, Eugene
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Deformable mirrors (DMs) are a critical technology to enable coronagraphic direct imaging of exoplanets with current and planned ground - and space-based telescopes as well as future mission concepts that aim to image exoplanet types ranging from gas giants to Earth analogs. This places several requirements on the DMs such as requires a large actuator count (>3000), fine surface height resolution (<10 pm), and radiation hardened driving electronics with low mass and volume. We present the design and testing of a flight-capable, miniaturized DM controller. Having achieved contrasts on the order of 5x10-9 on a coronagraph testbed in vacuum in the high contrast imaging testbed facility at NASA's Jet Propulsion Laboratory (JPL), we demonstrate that the electronics are capable of meeting the requirements of future coronagraph-equipped space telescopes. We also report on functionality testing onboard the high-altitude balloon experiment "Planetary Imaging Concept Testbed Using a Recoverable Experiment Coronagraph," which aims to directly image debris disks and exozodiacal dust around nearby stars. The controller is designed for the Boston Micromachines Corporation Kilo-DM and is readily scalable to larger DM formats. The three main components of the system (the DM, driving electronics, and mechanical and heat management) are designed to be compact and have low-power consumption to enable its use not only on exoplanet missions, but also in a wide-range of applications that require precision optical systems, such as direct line-of-sight laser communications. The controller is capable of handling 1024 actuators with 220 V maximum dynamic range, 16-bit resolution, 14-bit accuracy, and 1 kHz operating frequency. The system fits in a 10 x 10 x 5 cm3 volume, weighs <0.5 kg, and consumes <8 W. We have developed a turnkey solution reducing the risk for future missions.
Length-Dependent Conductance of a Spin-Incoherent Hubbard chain; Monte Carlo Calculations
Creators: name: Syljuasen, Olav F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The dc conductance of a short spin-incoherent Hubbard chain coupled to leads is investigated using quantum Monte Carlo calculations. In contrast with the Luttinger liquid regime, where the conductance is equal to the noninteracting value, the spin-incoherent regime displays a conductance that decreases rapidly with chain length down to a value of roughly 1.5e2/h for a four site chain followed by a slower decrease for longer chains. We also discuss the resistance contribution from scattering in the contacts.
description: v2: New title and revised introduction. Improved extrapolation and error analysis. New data for Lw=2,4 in Fig5(a)
One-loop renormalisation of N=1/2 supersymmetric gauge theory with a superpotential
Creators: name: Jack, I.
name: Jones, D. R. T.
name: Worthy, L. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a superpotential for the general N=1/2 supersymmetric gauge theory coupled to chiral matter in the fundamental and adjoint representations, and investigate the one-loop renormalisability of the theories.
description: 67 pages, including 17 figures. Plain TeX. Uses Harvmac and epsf. Combined and condensed version of hep-th/0607194 and hep-th/0607195 with some added material including in particular a generalisation of the Lunin-Rey classification of potentially divergent operators
Additional file 6 of Exploring Carolingian and Romanesque cycles: a study of the detached wall paintings from the Church of St. Johann in Müstair
Creators: name: Lombardo, Tiziana
name: Caroselli, Marta
name: Martinucci, Camilla
name: Hildbrand, Erwin
name: Moretti, Patrizia
name: Cassitti, Patrick
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Cell Biology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Supplementary Material 6.
Social, cultural, economic and individual factors influencing prevention and management of malaria infections among pregnant women in Ghanaian communities
Creators: name: M Aberese-Ako
name: G. D Ampofo
name: P Magnussen
name: H Tagbor
Publisher: name: AAS Open Research
Year: 2019

description: The study sought to understand and describe how and why some pregnant women in Ghana still experience malaria infection, despite the implementation of efficacious interventions such as intermittent preventive treatment of malaria in pregnancy, free issuance of bed net to antenatal clinic (ANC) registrants and testing and treating malaria in pregnancy. Qualitative research methods including indepth interviews, focus group discussions, observations, conversations and case studies were conducted among health workers in eight health facilities and among pregnant women and opinion leaders in thirteen communities. Social and economic factors including staying out late with family members, jobs that contributed to women staying out late and belief that there were no mosquitoes in the environment exposed pregnant women to mosquito bites and malaria infection. Poor knowledge on how to hang a net properly, exposed women to malaria infection. Warm weather and the design of houses contributed to some women being reluctant to use bed nets. Some women did not attend ANC in the first trimester, so they did not benefit from interventions early, which increased their risk of malaria infection.Community health care needs to be strengthened, if interventions to prevent malaria are to be made accessible to all pregnant women in Ghana.
How to calculate the fractal dimension of a complex network: the box covering algorithm
Creators: name: Song, Chaoming
name: Gallos, Lazaros K.
name: Havlin, Shlomo
name: Makse, Hernan A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Covering a network with the minimum possible number of boxes can reveal interesting features for the network structure, especially in terms of self-similar or fractal characteristics. Considerable attention has been recently devoted to this problem, with the finding that many real networks are self-similar fractals. Here we present, compare and study in detail a number of algorithms that we have used in previous papers towards this goal. We show that this problem can be mapped to the well-known graph coloring problem and then we simply can apply well-established algorithms. This seems to be the most efficient method, but we also present two other algorithms based on burning which provide a number of other benefits. We argue that the presented algorithms provide a solution close to optimal and that another algorithm that can significantly improve this result in an efficient way does not exist. We offer to anyone that finds such a method to cover his/her expenses for a 1-week trip to our lab in New York (details in http://jamlab.org).
description: 16 pages, 14 figures
Multidimensional impact of severe mental illnesses on family members in rural Ethiopia: Qualitative study
Creators: name: Wubalem  Fekadu
name: Craig, Tom K.J.
name: Abebaw  Fekadu
Publisher: name: AAS Open Research
Year: 2019

description: Aim: to explore the impact of serious mental illness on family members and their coping mechanisms
Methods: In-depth interviews were conducted among family key informants (n=27), people with Severe Mental Illness (SMI) (n=5) and religious leaders (n=3) in rural Ethiopia. All the in-depth interviews were conducted in Amharic and were audiotaped. Similar concepts were grouped together.
Results: Four themes were developed: current symptoms and functioning, stress and its consequences, socio-economic impact and impact on spouse and children. All participants except one described multidimensional impacts of the illness on them and other family members.
Stress resulted in increased susceptibility to an accident, suicidal behavior and sleep deprivation. The financial impact was related to lack of productivity and cost of treatment. The illness had an impact on family members’ social relationship. Spouses were left mainly alone in caring for children and their children were also unable to go to school or drop out. Suicide, substance abuse, and divorce with the patient were the commonly mentioned coping mechanisms.
Conclusion: The impact of SMI affects all family members. These consequences are potentially very serious and are not mitigated by coping strategies. Evaluation of the needs of the carers should form a key part of the intervention of people with SMI.
Dynamics of multilayer networks with amplification
Creators: name: Njougouo, Thierry
name: Camargo, Victor
name: Louodop, Patrick
name: Ferreira, Fernando Fagundes
name: Talla, Pierre K.
name: Cerdeira, Hilda A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: 68Q06

description: We study the dynamics of a multilayer network of chaotic oscillators subject to an amplification. Previous studies have proven that multilayer networks present phenomena such as synchronization, cluster and chimera states. Here we consider a network with two layers of Roessler chaotic oscillators as well as applications to multilayer networks of chaotic jerk and Lienard oscillators. Intralayer coupling is considered to be all to all in the case of Roessler oscillators, a ring for jerk oscillators and global mean field coupling in the case of Lienard, the interlayer coupling is unidirectional in all these three cases. The second layer has an amplification coefficient. An in depth study on the case of a network of Roessler oscillators using master stability function and order parameter leads to several phenomena such as complete synchronization, generalized, cluster and phase synchronization with amplification. For the case of Roessler oscillators, we note that there are also certain values of coupling parameters and amplification where the synchronization does not exist or the synchronization can exist but without amplification. Using other systems with different topologies, we obtain some interesting results such as chimera state with amplification, cluster state with amplification and complete synchronization with amplification.
description: 13 pages, 8 figures. To appear in Chaos: An Interdisciplinary Journal of Nonlinear Science
Turbulence from localized random expansion waves
Creators: name: Mee, Antony J.
name: Brandenburg, Axel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In an attempt to determine the outer scale of turbulence driven by localized sources, such as supernova explosions in the interstellar medium, we consider a forcing function given by the gradient of gaussian profiles localized at random positions. Different coherence times of the forcing function are considered. In order to isolate the effects specific to the nature of the forcing function we consider the case of a polytropic equation of state and restrict ourselves to forcing amplitudes such that the flow remains subsonic. When the coherence time is short, the outer scale agrees with the half-width of the gaussian. Longer coherence times can cause extra power at large scales, but this would not yield power law behavior at scales larger than that of the expansion waves. At scales smaller than the scale of the expansion waves the spectrum is close to power law with a spectral exponent of -2. The resulting flow is virtually free of vorticity. Viscous driving of vorticity turns out to be weak and self-amplification through the nonlinear term is found to be insignificant. No evidence for small scale dynamo action is found in cases where the magnetic induction equation is solved simultaneously with the other equations.
description: 5 pages, 7 figures, MNRAS
Generalized exceptional quantum walk search
Creators: name: Li, Meng
name: Shang, Yun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We mainly study exceptional configuration for coined quantum walk search. For searching on a two-dimensional grid by AKR algorithm, we find some new classes of exceptional configurations that cannot be found by the AKR algorithm effectively and the known diagonal configuration can be regarded as its special case. Meanwhile, we give two modified quantum walk models that can improve the success probability in the exceptional configurations by numerical simulation. Furthermore, we introduce the concept of generalized exceptional configuration and consider search by quantum walk on a cycle with Grover coin. We find that the most natural coin combination model (G,-), where G is a Grover diffusion transformation, is a generalized exceptional configuration when just searching one marked vertex on the cycle. In the end, we find generalized exceptional configuration has a different evolution of quantum coherence from exceptional configuration. These extend largely the range of exceptional configuration of quantum walk search in some sense.
Miss Queen of Cathay (1954) : Chinese women, families and associations in Vancouver
Creators: name: Poon, Joanne Mei-Chu
Publisher: name: University of British Columbia
Year: 2009

description: This study is an exploratory attempt to examine the process of female emigration in relation to marriages, the integrity of overseas Chinese communities and the relationships between Chinese women, families and associations. Personal reminiscences of women have revealed that female emigration was part of the process of family emigration rather than merely the result of male emigration. The late appearance of women in the stream of overseas migration and the arrival of wives completed the family emigration cycle, and thus overseas Chinese families were formed. In overseas Chinese communities, Chinese education was and is a means to cultivate and maintain Cliinese culture. Chinese schools were therefore established. However facing limited subsidies from the local government, Chinese people had to raise funds within their ethnic community for estabUshing Chinese schools. Organizing fund-raising campaigns, such as the fund-raising campaign for the Wengehua Huaqiao Gongli Xuexiao or the Vancouver Chinese Public School in 1954, became the survival tactic that Chinese people adopted to provide community services for themselves. The participation of individuals and associations in the campaign reflects the integrity of Vancouver's Chinese community in the 1950s. Individuals generously contributed and the associations cooperated when there was a need to collect money for the provision of social services. Using primarily the Chinese vernacular newspapers and personal narratives, the Miss Queen of Cathay contest has shown the participation of families in associations, the identification of Canadian-born daughters with the associations to which their fathers belonged, as well as the Chinese patriarchy in overseas Cliinese families and associations.