cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Critical assessment of hydrogen effects on the slip transmission across grain boundaries in α-Fe
Creators: name: Adlakha, I.
name: Solanki, K. N.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Grain boundaries (GBs) play a fundamental role in the strengthening mechanism of crystalline structures by acting as an impediment to dislocation motion. However, the presence of an aggressive environment such as hydrogen increases the susceptibility to intergranular fracture. Further, there is a lack of systematic investigations exploring the role of hydrogen on the dislocation-grain-boundary (DGB) interactions. Thus, in this work, the effect of hydrogen on the interactions between a screw dislocation and <111> tilt GBs in α-Fe were examined. Our simulations reveal that the outcome of the DGB interaction strongly depends on the underlying GB dislocation network. Further, there exists a strong correlation between the GB energy and the energy barrier for slip transmission. In other words, GBs with lower interfacial energy demonstrate a higher barrier for slip transmission. The introduction of hydrogen along the GB causes the energy barrier for slip transmission to increase consistently for all of the GBs examined. The energy balance for a crack initiation in the presence of hydrogen was examined with the help of our observations and previous findings. It was found that the presence of hydrogen increases the strain energy stored within the GB which could lead to a transgranular-to-intergranular fracture mode transition.
Laboratory modeling of jets from young stars using plasma focus facilities
Creators: name: Beskin, V. S.
name: Krauz, V. I.
name: Lamzin, S. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Jets from young stars are used as an example to review how laboratory modeling enables advancement in understanding the main physical processes responsible for the formation and stability of these amazing objects. The discussion focuses on the options for modeling jet emissions in a laboratory experiment at the PF-3 facility at the National Research Center Kurchatov Institute. Many properties of the flows obtained using this experimental setup are consistent with the main features of jets from young stars.
description: 39 pages, 26 figures, 2 tables
title:   Effects of Social Isolation and Adolescent Ethanol Exposure on Adult Drinking and Nicotine Co-Use
Creators: name: Shaykin, Jakob
Publisher: name: University of Kentucky Libraries
Year: 2023
Subjects: subject: FOS: Psychology
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: Alcohol use often begins in adolescence and can lead to increased susceptibility to AUD in adulthood. Stress in the form of social isolation during adolescence can also prompt substance use disorders later in adulthood. This thesis determined if exposure to ethanol (EtOH) during adolescence and social isolation alters the trajectory of alcohol and nicotine intake during adulthood. In Experiment 1, adolescent male and female Sprague-Dawley rats were administered intermittent injections of EtOH (2g/kg 20% EtOH, IP) or saline (PND 28-41). EtOH consumption was measured in adulthood (PND 49-55) using a 2-bottle choice procedure where one bottle contained a 0.2% saccharin/15% EtOH (Sacc/EtOH) solution, and the other water. Rats were then trained to self-administer nicotine (0.03 mg/kg/infusion) with Sacc/EtOH and water concurrently available under an incremental fixed ratio (FR) schedule for nicotine (PND 66-101). In Experiment 2, group and isolate housed male Sprague-Dawley rats were exposed to 0.2% saccharin/ 20% EtOH (Sacc/EtOH) using an intermittent 24-hour 2-bottle choice during adolescence (PND 28-61); control rats received water only. In adulthood, rats underwent 2-bottle choice sessions (PND 73-86), then were trained to self-administer nicotine (0.03 mg/kg/infusion) with Sacc/EtOH and water concurrently available under an incremental FR schedule for nicotine (PND 98-137). In Experiment 1, IP injections of EtOH in adolescence reduced adult Sacc/EtOH intake in male rats. In Experiment 2, isolation in adolescence increased adolescent intake for Sacc/EtOH, although this trend did not continue to adulthood as the combined effects of isolation and EtOH exposure in adolescence did not increase adult EtOH intake. In Experiments 1 and 2, a substitutional relationship between Sacc/EtOH and nicotine was observed. Overall, this thesis provides evidence that although social isolation may increase EtOH intake in adolescence, adolescent exposure to EtOH reduces intake in adulthood.
description: © 2023 Jakob Shaykin
Simulación del desarrollo urbano de la ciudad de Cartagena, como estrategia para el apoyo de políticas públicas
Creators: name: García Méndez, Adalberto
name: Guzmán Brito, Jairo Rafael
Publisher: name: Universidad de Cartagena
Year: 2013
Subjects: Simulación
Desarrollo Urbano - Cartagena - Bolívar
Desarrollo urbano - Estrategias

description: Tesis (Ingeniero de Sistemas).--Universidad de Cartagena. Facultad de Ciencias E Ingenierías. Programa de Ingeniería de Sistemas, 2013
description: El proyecto de tesis titulado “Simulación del Desarrollo Urbano de la Ciudad de Cartagena, como Estrategia para el Apoyo de Políticas Públicas”, nace con el objetivo o propósito de ayudar a la toma de decisiones en lo referente a normas o políticas de la ciudad de Cartagena con la elaboración y simulación digital de modelos de desarrollo urbano, de la ciudad de Cartagena de Indias, a fin de soportar la emisión de políticas públicas tendientes al desarrollo de la ciudad, utilizando dinámica de sistemas.
Award_2023_02
Creators: name: Ortenzi Luciano
name: Pallottino Federico
name: Vasta, Simone
name: Figorilli, Simone
name: Tocci Francesco
name: Costa Corrado
name: Antonucci Francesca
name: Violino Simona
Publisher: name: OSF
Year: 2024

description: February 2023 – Selected Feature Paper for the publication: Ortenzi L, Violino S, Pallottino F, Figorilli S, Vasta S, Tocci F, Antonucci F, Imperi G, Costa C, 2021. Early estimation of olive production from light drone orthophoto, through canopy radius. DRONES, 5(4): 118. https://doi.org/10.3390/drones5040118 MDPI, 9 Febbraio 2023.
A fifteen-year-long medical error
Creators: name: Research, Nature
Publisher: name: Manara - Qatar Research Repository
Year: 2023
Subjects: classificationCode: 32
subject: Biomedical and clinical sciences
classificationCode: 3201
subject: Cardiovascular medicine and haematology

description: Doctors in Pakistan report the case of a surgical sponge left inside a patient’s body during a medical procedure and only discovered 15 years later.The report, published in the Qatar Medical Journal, describes the case of a 40-year-old woman who visited the Aga Khan University Hospital in Karachi complaining of nausea, loss of appetite, and discomfort in the lower abdominal region.The woman had been experiencing these symptoms for over 10 years. During the past five years, her appetite was reduced, she lost 3 kg in weight and experienced fewer bowel movements.Examining her medical history, the doctors noted that she had given birth three times — twice by natural vaginal delivery, and once by emergency Caesarian section, some 15 years earlier.Her blood tests and urinalysis were normal, so the doctors performed a CT scan of the woman’s abdomen and pelvis that yielded surprising results. The scan showed that the woman bore a rounded mass with thin metallic coils in her lower left abdomen.The doctors then suspected that a surgical sponge had been left inside her body during the C-section surgery. After discussions with the patient and her family, the doctors decided that surgical intervention was necessary to remove the foreign body left behind. A follow-up exam performed one year later showed that the patient had recovered well and remained free of any symptoms.“She initially developed feelings of anger and resentment towards her obstetrician,” says Muhammad Abdul Rehman, lead author of the case study. “She wanted to know if this was a direct mistake of the attending doctor and how it could even take place, [but] as her anger subsided, she realized that this was an unfortunate and rare event, and nothing had been done deliberately.”The first case of the retention of a surgical sponge or other foreign body, called gossypiboma, was described in 1884. It is estimated to occur once in every 1,000 or 1,500 abdominal surgeries. This may be a conservative estimate, however, and it may occur more frequently.It almost always occurs as a result of human error, and is, therefore, preventable. Some researchers are now studying whether the use of barcoded or radiofrequency identification-tagged sponges could reduce its occurrence or prevent it altogether.“The most important measure to avoid such mishaps is to improve communication amongst members of the operating team, especially scrub nurses, technicians and surgeons,” says Abdul Rehman. “Strict adherence to sponge-counting protocols is also important.”
Other InformationPublished in: QScience.com Highlights, Published by Nature Research for Hamad bin Khalifa University Press (HBKU Press)
License:http://creativecommons.org/licenses/by/4.0
Situación de los eventos adversos y complicaciones que se presentan en las clínicas de la Facultad de Odontología de la Universidad de Cartagena
Creators: name: Bustillo Barrios, Melissa
name: Agresott Marsiglia, Kelvin
name: De La Valle Archibold, Mónica María
Publisher: name: Universidad de Cartagena
Year: 2012
Subjects: Atención odontológica
Odontólogos
Odontología como profesión
Salud oral - Promoción y prevención;

description: Tesis (Odontologo). -- Universidad de Cartagena. Facultad de Odontología. Departamento de Investigaciones, 2012
description: Dentro de esta investigación, se busca describir la situación de los eventos adversos y la actitud asumida por los estudiantes en la facultad de odontología de la universidad de Cartagena.
Scaling in erosion of landscapes: Renormalization group analysis of a model with infinitely many couplings
Creators: name: Antonov, N. V.
name: Kakin, P. I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Standard field theoretic renormalization group is applied to the model of landscape erosion introduced by R. Pastor-Satorras and D. H. Rothman [Phys. Rev. Lett. 80: 4349 (1998); J. Stat. Phys. 93: 477 (1998)] yielding unexpected results: the model is multiplicatively renormalizable only if it involves infinitely many coupling constants ( i.e., the corresponding renormalization group equations involve infinitely many beta-functions). Despite this fact, the one-loop counterterm can be derived albeit in a closed form in terms of the certain function $V(h)$, entering the original stochastic equation, and its derivatives with respect to the height field $h$. Its Taylor expansion gives rise to the full infinite set of the one-loop renormalization constants, beta-functions and anomalous dimensions. Instead of a set of fixed points, there is a two-dimensional surface of fixed points that is likely to contain infrared attractive region(s). If that is the case, the model exhibits scaling behaviour in the infrared range. The corresponding critical exponents are nonuniversal through the dependence on the coordinates of the fixed point on the surface, but satisfy certain universal exact relations.
description: The authors thank the Organizers of the International Conference "Models in Quantum Field Theory V" for the opportunity to present the results of the research summarised in the paper
Außerschulische Lernorte im Geometrieunterricht der Grundschule – eine Wirksamkeitsstudie
Creators: name: Sitter, Kerstin
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2015
Subjects: subject: 510

description: Im vorliegenden Forschungsprojekt steht die Einbeziehung authentischer Umgebungen im Geometrieunterricht der Grundschule im Zentrum. Schwerpunkt des Forschungsvorhabens ist die Entwicklung von geometrischem Wissen und Können zu Körpern. Durch eine adäquate Vernetzung schulischen und außerschulischen Lernens in Verbindung mit dem Protokollieren soll ein nachhaltiger Erkenntnisgewinn zu geometrischen Körpern bei Viertklässlern erreicht werden.
Calamus macropterus Miq., Verh. Kon. Akad. Wetensch., Afd. Natuurk.
Creators: name: Baker, William J.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Arecales
Arecaceae
Calamus
Calamus macropterus

description: Calamus macropterus Miq., Verh. Kon. Akad. Wetensch., Afd. Natuurk. 11(5): 19 (1868).
 Palmijuncus macropterus (Miq.) Kuntze, Revis. Gen. Pl. 2: 733 (1891), Daemonorops macroptera (Miq.) Becc., Rec. Bot. Surv. India 2: 223 (1902).
description: Published as part of Baker, William J., 2015, A revised delimitation of the rattan genus Calamus (Arecaceae), pp. 139-152 in Phytotaxa 197 (2) on page 145, DOI: 10.11646/phytotaxa.197.2.7, http://zenodo.org/record/13640784
Carbon nanotubes decorated with gold, platinum and rhodium clusters by injection of colloidal solutions into the post-discharge of a RF atmospheric plasma
Creators: name: Claessens, Nicolas
name: Demoisson, Frédéric
name: Dufour, Thierry
name: Mansour, Ali
name: Felten, Alexandre
name: Guillot, Jérôme
name: Pireaux, Jean-Jacques
name: Reniers, François
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this paper, we present a new, simple, robust and efficient technique to decorate multi-wall carbon nanotubes (MWCNT) with metal nanoparticles. As case studies, Au, Pt and Rh nanoparticles are grafted onto MWCNTs by spraying a colloidal solution into the post-discharge of an atmospheric argon or argon/oxygen RF plasma. The method that we introduce here is different from those usually described in the literature, since the treatment is operated at atmospheric pressure, allowing the realization in only one step of the surface activation and the deposition processes. We demonstrate experimentally that the addition of oxygen gas in the plasma increases significantly the amount of grafted metal nanoparticles. Moreover, TEM pictures clearly show that the grafted nanoparticles are well controlled in size.
Forschung zum Mathematischen Argumentieren – Ein deskriptiver Review von PME Beiträgen
Creators: name: Sommerhoff, Daniel
name: Ufer, Stefan
name: Kollar, Ingo
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2015
Subjects: subject: 510

description: Die Mathematik ist eine beweisende Wissenschaft. Mathematisches Argumentieren und Beweisen (MA&B) sind zentrale Aktivitäten der Mathematik und gehören zu den wichtigsten zu erlernenden Fähigkeiten im schulischen und universitären Bereich (Brunner, 2014). Gerade in der Sekundarstufe wurde der Fokus auf Argumentieren in den letzten Jahren weltweit durch curriculare Änderungen verstärkt, entsprechend ist MA&B auch innerhalb der Didaktik der Mathematik wieder zunehmend in den Forschungsmittelpunkt gerückt. In diesem Beitrag wird Argumentieren im Sinne Toulmins relativ offen verstanden, insbesondere werden auch nicht deduktives Schlussfolgern und Beweisen als Spezialfälle des Argumentierens verstanden (Reiss & Ufer, 2009).
Water and acetaldehyde in HH212: The first hot corino in Orion
Creators: name: Codella, C.
name: Ceccarelli, C.
name: Cabrit, S.
name: Podio, L.
name: Bachiller, R.
name: Fontani, F.
name: Gusdorf, A.
name: Lefloch, B.
name: Leurini, S.
name: Tafalla, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Aims: Using the unprecedented combination of high resolution and sensitivity offered by ALMA, we aim to investigate whether and how hot corinos, circumstellar disks, and ejected gas are related in young solar-mass protostars. Methods: We observed CH$_3$CHO and deuterated water (HDO) high-excitation ($E_{\rm u}$ up to 335 K) lines towards the Sun-like protostar HH212--MM1. Results: For the first time, we have obtained images of CH$_3$CHO and HDO emission in the inner $\simeq$ 100 AU of HH212. The multifrequency line analysis allows us to contrain the density ($\geq$ 10$^{7}$ cm$^{-3}$), temperature ($\simeq$ 100 K), and CH$_3$CHO abundance ($\simeq$ 0.2--2 $\times$ 10$^{-9}$) of the emitting region. The HDO profile is asymmetric at low velocities ($\leq$ 2 km s$^{-1}$ from $V_{\rm sys}$). If the HDO line is optically thick, this points to an extremely small ($\sim$ 20--40 AU) and dense ($\ge$ 10$^{9}$ cm$^{-3}$) emitting region. Conclusions: We report the first detection of a hot corino in Orion. The HDO asymmetric profile indicates a contribution of outflowing gas from the compact central region, possibly associated with a dense disk wind.
description: Astronomy & Astrophysics Letter, in press
Imaging nuclear spins weakly coupled to a probe paramagnetic center
Creators: name: Laraoui, Abdelghani
name: Pagliero, Daniela
name: Meriles, Carlos A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Optically-detected paramagnetic centers in wide-bandgap semiconductors are emerging as a promising platform for nanoscale metrology at room temperature. Of particular interest are applications where the center is used as a probe to interrogate other spins that cannot be observed directly. Using the nitrogen-vacancy center in diamond as a model system, we propose a new strategy to determining the spatial coordinates of weakly coupled nuclear spins. The central idea is to label the target nucleus with a spin polarization that depends on its spatial location, which is subsequently revealed by making this polarization flow back to the NV for readout. Using extensive analytical and numerical modeling, we show that the technique can attain high spatial resolution depending on the NV lifetime and target spin location. No external magnetic field gradient is required, which circumvents complications resulting from changes in the direction of the applied magnetic field, and considerably simplifies the required instrumentation. Extensions of the present technique may be adapted to pinpoint the locations of other paramagnetic centers in the NV vicinity or to yield information on dynamical processes in molecules on the diamond surface.
Efficient thermal energy harvesting using nanoscale magnetoelectric heterostructures
Creators: name: Etesami, Seyyed Ruhollah
name: Berakdar, Jamal
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thermomechanical cycles with a ferroelectric working substance convert heat to electrical energy. As shown here, magnetoelectrically coupled ferroelectric/ferromangtic composites (also called multiferroics) add new functionalities and allow for an efficient thermal energy harvesting at room temperature by exploiting the pyroelectric effect. By virtue of the magnetoelectric coupling, external electric and magnetic fields can steer the operation of these heat engines. Our theoretical predictions are based on a combination of Landau-Khalatnikov-Tani approach (with a Ginzburg-Landau-Devonshire potential) to simulate the ferroelectric dynamics coupled to the magnetic dynamics. The latter is treated via the electric-polarization-dependent Landau-Lifshitz-Gilbert equation. Performing an adapted Olsen cycle we show that a multiferroic working substance is potentially much more superior to sole ferroelectrics, as far as thermal energy harvesting using pyroelectric effect is concerned. Our proposal holds promise not only for low-energy consuming devices but also for cooling technology.
description: 5 pages, 5 figures, Accepted in Applied Physics Letters
String theory as a Lilliputian world
Creators: name: Ambjorn, Jan
name: Makeenko, Yuri
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Lattice regularizations of the bosonic string allow no tachyons. This has often been viewed as the reason why these theories have never managed to make any contact to standard continuum string theories when the dimension of spacetime is larger than two. We study the continuum string theory in large spacetime dimensions where simple mean field theory is reliable. By keeping carefully the cutoff we show that precisely the existence of a tachyon makes it possible to take a scaling limit which reproduces the lattice-string results. We compare this scaling limit with another scaling limit which reproduces standard continuum-string results. If the people working with lattice regularizations of string theories are akin to Gulliver they will view the standard string-world as a Lilliputian world no larger than a few lattice spacings.
description: 11 pages, 1 figure
On the origin of Sérsic profiles of galaxies and Einasto profiles of dark-matter halos
Creators: name: Nipoti, Carlo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The surface-brightness profiles of galaxies I(R) and the density profiles of dark-matter halos rho(r) are well represented by the same analytic function, named after either Sérsic, I~exp[-(R/R*)^(1/m)], or Einasto, rho~[exp[-(r/r*)^alpha], where R* and r* are characteristic radii. Systems with high Sérsic index m (or low Einasto index alpha) have steep central profiles and shallow outer profiles, while systems with low m (or high alpha) have shallow central profiles and steep profiles in the outskirts. We present the results of idealized numerical experiments which suggest that the origin of these profiles can be traced back to the initial density fluctuation field: high-alpha (low-m) systems form in smooth regions via few mergers, while low-alpha (high-m) systems form in clumpy regions via several mergers.
description: 3 pages, 2 figures, Proceedings of IAU Symposium 321, "Formation and evolution of galaxy outskirts", Eds. A. Gil de Paz, J. C. Lee & J. H. Knapen, Cambridge University Press, Cambridge
Análisis y valoración de la información financiera y de los costos de las fuentes de financiación, de la firma Antonio Spath y Cia S.A. Durante los años 2008 - 2009 y 2010
Creators: name: Roja Niño, Flor De María
name: De Avila García, Jonny
Publisher: name: Universidad de Cartagena
Year: 2011
Subjects: Análisis de costo
Efectividad de costos
Antonio Spath - Análisis de costos

description: Tesis (Especialista en Finanzas) -- Universidad de Cartagena. Facultad de Ciencias Económicas. Especialización en finanzas, 2011
description: El objetivo de esta investigación busca analizar y evaluar la información contable y financiera durante los años 2008, 2009 y 2010 en la firma Antonio Spath y cía., con el propósito de conocer las variaciones en los procesos productivos y los costos de su estructura financiera de estos años.
Calamus maculatus W. J. Baker 2015, comb. nov.
Creators: name: Baker, William J.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Arecales
Arecaceae
Calamus
Calamus maculatus

description: Calamus maculatus (J.Dransf.) W.J.Baker, comb. nov.
 Daemonorops maculata J.Dransf., Kew Bull. 45: 76 (1990).
description: Published as part of Baker, William J., 2015, A revised delimitation of the rattan genus Calamus (Arecaceae), pp. 139-152 in Phytotaxa 197 (2) on page 146, DOI: 10.11646/phytotaxa.197.2.7, http://zenodo.org/record/13640784
Estudio comparativo entre aplicación de acupresión en punto P6 + Dexametasona Vs. Dexametasona como método profiláctico para náuseas y vómitos postoperatorios en pacientes programadas para cirugía laparoscópica ginecológica
Creators: name: Henao Castro, Herman Andrés
Publisher: name: Universidad de Cartagena
Year: 2016
Subjects: Acupresión
Efectos de la anestesia
Medicamentos

description: Tesis (Especialista en Anestesiología y Reanimación). -- Universidad de Cartagena, Facultad de Medicina. Departamento Quirúrgico, 2016.
description: En este trabajo de grado de enfoco en identificar la utilidad de la estimulación del punto P6 mediante acupresion + dexametasona comparándola con el uso de dexametasona sola en pacientes con alto riesgo de nauseas y vomitos postoperatorio.
Schrödinger Operators with $δ$-interactions in a Space of Vector-Valued Functions
Creators: name: Kostenko, Aleksey
name: Malamud, Mark
name: Natiagailo, Daria
Publisher: name: arXiv
Year: 2016
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study spectral properties of Schrödinger operators with $δ$-interactions on a semi-axis by using the theory of boundary triplets and the corresponding Weyl functions. We establish a connection between spectral properties (deficiency indices, self-adjointness, semiboundedness, discreteness of spectra, resolvent comparability etc.) of Schrödinger operators with point interactions and a special class of block Jacobi matrices.
description: In Russian
Hyperbolic Weyl point in reciprocal chiral metamaterial
Creators: name: Xiao, Meng
name: Lin, Qian
name: Fan, Shanhui
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the existence of Weyl points in a class of non-central symmetric metamaterials, which has time reversal symmetry, but does not have inversion symmetry due to chiral coupling between electric and magnetic fields. This class of metamaterial exhibits either type-I or type-II Weyl points depending on its non-local response. We also provide a physical realization of such metamaterial consisting of an array of metal wires in the shape of elliptical helixes which exhibits type-II Weyl points.
description: 4 figs
Gravitation, holographic principle, and extra dimensions
Creators: name: Caimmi, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Physics (physics.class-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Within the context of Newton's theory of gravitation, restricted to point-like test particles and central bodies, stable circular orbits in ordinary space are related to stable circular paths on a massless, unmovable, undeformable vortex-like surface, under the action of a tidal gravitational field along the symmetry axis. An interpretation is made in the light of a holographic principle, in the sense that motions in ordinary space are connected with motions on a selected surface and vice versa. Then ordinary space is conceived as a 3-hypersurface bounding a $n$-hypervolume where gravitation takes origin, within a $n$-hyperspace. The extension of the holographic principle to extra dimensions implies the existence of a minimum distance where test particles may still be considered as distinct from the central body. Below that threshold, it is inferred test particles lose theirs individuality and "glue" to the central body via unification of the four known interactions and, in addition, (i) particles can no longer be conceived as point-like but e.g., strings or membranes, and (ii) quantum effects are dominant and matter turns back to a pre-big bang state. A more detailed formulation including noncircular motions within the context of general relativity, together with further knowledge on neutron stars, quark stars and black holes, would provide further insight on the formulation of quantum gravity.
description: 13 pages, 2 figures, accepted for publication on Journal of Modern Physics, 2016, vol. 7, pp. 426-434
Resonance-enhanced waveguide-coupled silicon-germanium detector
Creators: name: Alloatti, Luca
name: Ram, Rajeev Jagga
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A photodiode with 0.55$\pm$0.1 A/W responsivity at a wavelength of 1176.9 nm has been fabricated in a 45 nm microelectronics silicon-on-insulator foundry process. The resonant waveguide photodetector exploits carrier generation in silicon-germanium (SiGe) within a microring which is compatible with high-performance electronics. A 3 dB bandwidth of 5 GHz at -4 V bias is obtained with a dark current of less than 20 pA.
description: 8 pages, 3 figures
Memoria histórica: análisis del conflicto armado en el municipio de San Vicente Ferrer Antioquia. Periodo 1998-2005
Creators: name: Yara Santa, Liliana Marleny
Publisher: name: Universidad de Cartagena
Year: 2020
Subjects: Conflicto armado - Historia
Consolidación de paz
Victimas de guerra

description: Tesis (Magíster en Conflicto Social y Construcción de Paz) -- Universidad de Cartagena. Facultad de Ciencias Sociales. Maestría en Conflicto Social y Construcción de Paz, 2020
description: Este proyecto de investigación tiene como objeto fundamental la reconstrucción de la Memoria Histórica de la población víctima del conflicto armado en el municipio de San Vicente Ferrer en el Departamento de Antioquia, durante periodo comprendido entre 1998-2005. Este proceso implica una compresión holística de los orígenes del conflicto armado en la región del Oriente antioqueño y cómo este se vincula y desarrolla en lo local. La ley 1448 de 2011, “ley de víctimas y restitución de tierras”, en su capítulo IX, expresa la obligación de reparación simbólica y un irrestricto deber sobre la recuperación de la memoria, la búsqueda de la verdad y la no repetición. Esto entraña incesantes esfuerzos por no dejar en el olvido los hechos de horror y de violación de los derechos humanos a los que han sido sometidas poblaciones como las de San Vicente Ferrer. En ese sentido, un punto de llegada y también de partida es incluir la mayoría voces diversas, que, desde su participación voluntaria, activa y protagónica contribuyan a hilvanar el tejido de relatos de hechos victimizantes y con ello, se oriente a nuevos horizontes de expectativa, personal, comunitaria e institucional, con el solo propósito de que estos procesos de investigación puedan también aportar a la transformación social del conflicto. En términos metodológicos la investigación transita en el utillaje ofrecido por el centro de Memoria Nacional de Histórica , que incluye una guía didáctica, con técnicas para los gestores de archivos de derechos humanos, DIH y de Memoria Histórica. (Caja de herramientas para gestores de archivos de derechos humanos, DIH y Memoria Histórica, 2015). Además de ese cumulo de dispositivos de aplicación, el estudio se alimenta de algunos referentes teóricos y conceptuales en relación al estudio de la memoria individual y colectiva. Siendo entonces un trabajo de corte cualitativo, las herramientas a usar serán: línea de tiempo, biografía visual, diario de campo, historias de vida y biografías sociales, se realizarán entrevistas a profundidad y semiestructuradas, de tal manera que permitan hacer un análisis de los efectos de la violencia en la vida anímica de las personas. A casusa de la pandemia global que atraviesa nuestro país por el COVID 19, nos vimos obligados a cambiar algunas estrategias de acercamiento comunitario para la realización de las entrevistas y de la obtención de otros datos de relevancia. En ese sentido el medio virtual, tales como video llamadas, llamadas con grabación de audio, fueron una herramienta complementaria y en algunos casos única para el alcance de los fines propuestos.
Die unscharfen Konturen der Begrifflichkeit bezüglich eines letzten Prinzips
Creators: name: Cornélis, Etienne
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 21 Nr. 1 (1985): Concilium: Internationale Zeitschrift für Theologie, Band 21, Heft 1
An unusual superconducting Isotope Effect in the presence of a Quantum Criticality
Creators: name: Kedem, Yaron
name: Zhu, Jian-Xin
name: Balatsky, Alexander V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We discuss the possible connection between superconductivity (SC) and quantum critical points (QCP) for any QCP that is tunable by isotopic mass substitution. We find a distinct contribution to the isotope exponent, due to the proximity to a QCP, which can be used as an experimental signature for the relation between SC and QCP. The relation is demonstrated in a scenario where the SC pairing is due to modes related to a structural instability. Within this model the isotope exponent is derived in terms of microscopic parameters.
The origins and development of the Irish Republican Socialist Party and Irish National Liberation Army 1972-77
Creators: name: Cormican, Adrian
Publisher: name: University of Limerick
Year: 2023
Subjects: classificationCode: 43
subject: History, heritage and archaeology

description: This thesis examines the emergence of both the Irish Republican Socialist Party and Irish National Liberation Army from the ranks of the Official republican movement in 1974. In the years immediately following the unsuccessful IRA Border Campaign of 1956 to 1962, republicanism realigned itself to the far left of Irish politics. The tensions resulting from this precipitated in a major ideological split, creating two rival organisations with different approaches to uniting Ireland. The Official republican movement propagated a utopian scenario in which Northern Ireland’s Catholic and Protestant working classes would merge politically to implement reforms culminating in a thirty-two county socialist republic. By contrast the politics of the Provisional republican movement favoured an armed campaign to force a complete British withdrawal from the island. Internal divisions within the former organisation caused another fissure to occur, resulting in the establishment of the Irish Republican Socialist Party. The leader of this new group, Séamus Costello, combined a hard left philosophy with physical force actions in pursuit of his organisation’s stated goal of ending imperialist rule in Ireland and founding a unified democratic socialist republic under working class governance. Over the next three years the organisation’s military wing, the Irish National Liberation Army, became involved in a series of bloody encounters with both the Officials and the security apparatus of the Northern state, inflicting numerous losses on each belligerent while sustaining several casualties within its own ranks. This thesis primarily focuses on the development of the Irish Republican Socialist Party/Irish National Liberation Army between 1972 and 1977, highlighting the complex circumstances that led to the creation of one of most violent participants in the Troubles.
Isotropic Wave Turbulence with simplified kernels: existence, uniqueness and mean-field limit for a class of instantaneous coagulation-fragmentation processes
Creators: name: Merino-Aceituno, Sara
Publisher: name: arXiv
Year: 2015
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 82C21, 60H35

description: The isotropic 4-wave kinetic equation is considered in its weak formulation using model (simplified) homogeneous kernels. Existence and uniqueness of solutions is proven in a particular setting where the kernels have a rate of growth at most linear. We also consider finite stochastic particle systems undergoing instantaneous coagulation- fragmentation phenomena and give conditions in which this system approximates the solution of the equation (mean-field limit).
description: arXiv admin note: text overlap with arXiv:math/9801145 by other authors
La pena como modo de readaptación social
Creators: name: Simancas Torres, Libardo
Publisher: name: Universidad de Cartagena
Year: 1975
Subjects: Penas

description: Tesis (Abogado) -- Universidad de Cartagena. Facultad de Derecho y Ciencias Políticas. Programa de Derecho, 1975
description: Necesaria revisión actual del código de procedimiento penal, para agilizar el proceso y evitar la demora en la cárcel, mientras se le resuelve la situación jurídica al sindicado.
Στοχευμένη αστυνομική δράση για την πρόληψη του αυτοκτονικού ιδεασμού και την αποτροπή της απόπειρας αυτοκτονίας. Επιστημονική εκπαίδευση στελεχών της Ελληνικής Αστυνομίας για την ορθή και αποτελεσματική αντιμετώπιση του φαινομένου
Creators: name: Αντωνάκη, Βασιλική Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: αυτοκτονικός ιδεασμός
αυτοκτονία
αστυνομικοί
suicidal ideation
suicide
police officers

description: Ο αυτοκτονικός ιδεασμός είναι μια κατάσταση στην οποία το άτομο έχει σκέψεις και συναισθήματα που σχετίζονται με το θάνατο ή την αυτοκτονία. Αν και κάθε περίπτωση αυτοκτονικού ιδεασμού δεν συνεπάγεται ούτε με απόπειρα αυτοκτονίας και προφανώς ούτε με αυτοκτονία, αυτό δε σημαίνει ότι δεν είναι ένα φλέγον θέμα στο οποίο η επιστημονική κοινότητα αδιαμφισβήτητα οφείλει να εστιάσει. Τα αίτια του αυτοκτονικού ιδεασμού είναι πολυποίκιλα, αλλά όλα συνδέονται με συναισθήματα απόγνωσης. Ιδιαίτερα μεγάλα ποσοστά αυτοκτονικού ιδεασμού παρατηρούνται στα άτομα μεγαλύτερης ηλικίας. Σε όλες τις περιπτώσεις δεν θα ήταν υπερβολικό να θεωρήσουμε ότι τα άτομα που κάνουν αυτοκαταστροφικές σκέψεις χρήζουν ιατρικής βοήθειας. Διακρίνουμε δυο είδη αυτοκτονικού ιδεασμού: τον ενεργητικό και τον παθητικό. Στην πρώτη περίπτωση τα άτομα έχουν σκέψη να βλάψουν τον εαυτό τους, ενώ στη δεύτερη περίπτωση απλά δεν θα κάνουν κάτι για να βελτιώσουν την κατάσταση της υγείας τους. Τα τελευταία χρόνια έχουν αυξηθεί πάρα πολύ οι αλληλεπιδράσεις των αστυνομικών οργάνων με άτομα που αντιμετωπίζουν κρίσεις ψυχικής υγείας. Έτσι γίνεται αντιληπτή η ανάγκη για παρακολούθηση προγραμμάτων επιμόρφωσης σχετικά με τη βέλτιστη αντιμετώπιση αυτών των περιστατικών. Τα αποτελέσματα των ερευνών δείχνουν ότι αν και πραγματοποιούνται τέτοια προγράμματα, υπάρχει έντονη ανάγκη για πρόσθετη εκπαίδευση
description: Suicidal ideation is a condition in which the person has thoughts and feelings related to death or suicide. Although every case of suicidal ideation does not involve a suicide attempt and obviously not even a suicide, this does not mean that it is not a hot topic that the scientific community should not focus on. The causes of suicidal ideation are varied, but all are linked to feelings of despair. Particularly high rates of suicidal ideation are observed in older people. In all cases it would not be too much of a stretch to assume that people who have self-destructive thoughts need medical help. We distinguish two types of suicidal ideation: active and passive. In the first case people have thoughts of harming themselves, while in the second case they simply won't do anything to improve their health condition. In recent years, police interactions with people experiencing mental health crises have increased enormously. Thus, the need to monitor training programs regarding the optimal treatment of these incidents is perceived. Survey results show that although such programs are in place, there is a strong need for additional training
Caracterización del concreto autocompactante (cac) utilizando materiales normalizados
Creators: name: Patiño Maza, Eduardo Enrique
name: Romero Martinez, Hugo
Publisher: name: Universidad de Cartagena
Year: 2002
Subjects: Estructuras
Concreto

description: Tesis (Ingeniero Civil). - - Universidad de Cartagena. Facultad de Ciencias E Ingeniería. Programa de Ingeniería Civil, 2002.
description: El presente estudio tiene por objeto evaluar si las características, tanto en estado fresco como endurecido, del concreto autocompactante con materiales normalizados disponibles en la zona satisfacen los requerimientos tanto técnicos como económicos del mercado.
Calamus manii W. J. Baker 2015, comb. nov.
Creators: name: Baker, William J.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Arecales
Arecaceae
Calamus
Calamus manii

description: Calamus manii (Becc.) W.J.Baker, comb. nov.
 Daemonorops manii Becc. in J.D.Hooker, Fl. Brit. India 6: 463 (1893).
description: Published as part of Baker, William J., 2015, A revised delimitation of the rattan genus Calamus (Arecaceae), pp. 139-152 in Phytotaxa 197 (2) on page 146, DOI: 10.11646/phytotaxa.197.2.7, http://zenodo.org/record/13640784
An Empirical Study on Knowledge Networks]{An Empirical Study on the Characteristics of Knowledge Networks through Internal Links Shared on Stack Overflow
Creators: name: Wolf, Grey
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 461202
subject: Empirical software engineering

description: code for paper "An Empirical Study on Knowledge Networks]{An Empirical Study on the Characteristics of Knowledge Networks through Internal Links Shared on Stack Overflow"
Campodea (Campodea) donensis Rusek 1965
Creators: name: Sendra, Alberto
name: Reboleira, Ana Sofia P. S.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplura
Campodeidae
Campodea
Campodea donensis

description: Campodea (Campodea) donensis Rusek, 1965
Campodea (Campodea) donensis Rusek, 1965a: 1346, pl. 1 figs 1–19.
Differential diagnosis from C. plusiochaeta species (Rusek 1965a)
Thinner and shorter notal macrosetae.
Habitat and distribution
Collected in the soil at two localities along the northern Black Sea (Rusek 1965a) and in the centre of the Anatolian Peninsula (Sendra et al. 2010).
description: Published as part of Sendra, Alberto & Reboleira, Ana Sofia P. S., 2020, Euro-Mediterranean fauna of Campodeinae (Campodeidae, Diplura), pp. 1-130 in European Journal of Taxonomy 728 on page 33, DOI: 10.5852/ejt.2020.728.1181, http://zenodo.org/record/4316883
Broad-band spectral energy distribution of 3000 Angstroem break quasars from the Sloan Digital Sky Survey
Creators: name: Meusinger, H.
name: Schalldach, P.
name: Mirhosseini, A.
name: Pertermann, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Sloan Digital Sky Survey (SDSS) discovered a few unusual quasars with a characteristic break in the continuum around 3000 A that neither shows the typical structure of broad absorption line (BAL) troughs nor is explained by typical intrinsic dust reddening. We used the method of Kohonen self-organising maps for a systematical search for quasars with such properties in the SDSS spectra archive. We constructed a sample of 23 quasars classified as 3000 A break quasars and two comparison samples of quasars with similar properties, to some extent, but also showing typical BAL features. We computed ensemble-averaged broad-band SEDs based on archival data from SDSS, GALEX, 2MASS, UKIDSS, and WISE. The SEDs were corrected for intrinsic dust absorption by the comparison with the average SED of normal quasars. The de-reddened arithmetic median composite SED of the 3000 A break quasars is found to be indistinguishable from that of the unusual BAL quasars. We conclude that 3000 A break quasars are most likely extreme versions of BAL quasars. Assuming that the intrinsic SED of the continuum source is represented by the quasar composite SED, the 3000 A break quasars tend to be intrinsically more luminous than ordinary quasars. (Abstract modified to match the arXiv format.)
description: 33 pages, 15 figures in the main body and 14 figures in the appendix. Accepted for publication in A&A
Überzeugungen verändern mittels Medienberichte und 'kritischer Fragen'? Eine Interventionsstudie
Creators: name: Sturm, Alexandra
name: Eichler, Andreas
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2015
Subjects: subject: 510

description: Statistik spielt im alltäglichen Leben eine große Rolle. Dennoch messen viele Schüler und Erwachsene ihr weder eine hohe Bedeutung für das eigene Leben noch für die Gesellschaft bei. Mit einer anwendungsorientierten Intervention zum Satz von Bayes wird versucht, diese Überzeugungen bei SchülerInnen und Studierenden zu verändern. Im Rahmen dieses Beitrags werden Elemente der Intervention und erste empirische Ergebnisse vorgestellt.
Eigenproduktionen zu Beweisaufgaben von Teilnehmerinnen und Teilnehmern der Mathematik-Olympiade
Creators: name: Tebaartz, Petra Carina
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2015
Subjects: subject: 510

description: Dieser Beitrag gibt einen Einblick in die Heterogenität von Eigenproduktionen zu Beweisaufgaben durch Teilnehmerinnen und Teilnehmer der Mathematik- Olympiade. 216 Wettbewerbsteilnehmende in den Klassenstufen 5 bis 13 wurden im Rahmen der mathematischen Sommerakademie 2013 des Landesverbands Mathematikwettbewerbe NRW e.V. zum Beweisen aufgefordert. In den unteren Klassenstufen sind die Unterschiede besonders differenziert. Deshalb werden, nach einer kurzen Einführung des theoretischen Rahmens, exemplarisch Eigenproduktionen von Fünftklässlern analysiert und mögliche Bedingungsfaktoren der heterogenen Leistungen ausgeführt.
Calamus micracanthus Griff., Calcutta J. Nat. Hist.
Creators: name: Baker, William J.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Arecales
Arecaceae
Calamus
Calamus micracanthus

description: Calamus micracanthus Griff., Calcutta J. Nat. Hist. 5: 62 (1845).
 Palmijuncus micracanthus (Griff.) Kuntze, Revis. Gen. Pl. 2: 733 (1891). Daemonorops micracantha (Griff.) Becc. in J.D.Hooker, Fl. Brit. India 6: 467 (1893). Rotang micracanthus (Griff.) Baill., Hist. Pl. 13: 299 (1895).
 Daemonorops draconcella Becc., Nelle Forest. Borneo: 608 (1902).
description: Published as part of Baker, William J., 2015, A revised delimitation of the rattan genus Calamus (Arecaceae), pp. 139-152 in Phytotaxa 197 (2) on page 146, DOI: 10.11646/phytotaxa.197.2.7, http://zenodo.org/record/13640784
Calamus microstachys W. J. Baker 2015, comb. nov.
Creators: name: Baker, William J.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Arecales
Arecaceae
Calamus
Calamus microstachys

description: Calamus microstachys (Becc.) W.J.Baker, comb. nov.
 Daemonorops microstachys Becc., Rec. Bot. Surv. India 2: 225 (1902).
description: Published as part of Baker, William J., 2015, A revised delimitation of the rattan genus Calamus (Arecaceae), pp. 139-152 in Phytotaxa 197 (2) on page 146, DOI: 10.11646/phytotaxa.197.2.7, http://zenodo.org/record/13640784