cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Statement by U.S. Secretary of Transportation John A. Volpe at a News Conference
Creators: name: Volpe, John A.
name: United States Department of Transportation
Publisher: name: United States Department of Transportation
publisherIdentifier: https://ror.org/02xfw2e90
publisherIdentifierScheme: ROR
Year: 1971
Subjects: classificationCode: https://trt.trb.org/term/89740
subject: Strategic planning
classificationCode: https://trt.trb.org/term/88925
subject: Regulation
classificationCode: https://trt.trb.org/term/90595
subject: Transportation safety
classificationCode: https://trt.trb.org/term/90662
subject: Traffic crashes

description: See the Secretary of Transportation Speeches Collection's finding aid at: https://ntl.as.atlas-sys.com/repositories/2/resources/4
description: Statement by U.S. Secretary of Transportation John A. Volpe at a News Conference, Washington, D.C., Wednesday, January 13, 1971.
Traumatic transnasal penetrating injury with cerebral spinal fluid leak
Creators: name: Teng, Tan Sui
name: Ishak, Noor Liza
name: Subha, Sethu Thakachy
name: Bakar, Saraiza Abu
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2019
Subjects: pencil
penetrating trauma
skull base fracture
CSF leak

description: CSF leak in penetrating skull base injury is relatively rare compared to close head injury involving skull base fracture. We report a 5-year-old boy presented with epistaxis and impacted pencil into the left nostril. The child was hemodynamically stable without any neurological deficit. Intraoperatively, there was a nasal septal defect posteriorly with anterior skull base fracture associated with CSF leak. The pencil was removed from the left nostril and the CSF leak was repaired using harvested abdominal fat under the same setting. Computed Tomography (CT) of the brain showed right cribriform plate fracture with small pneumocranium. Postoperatively, a prophylactic antibiotic was given for seven days and he was discharged well. Subsequent clinic visits up to one-year postoperative period showed no recurrence of the CSF leak. History taking, physical examination and CT imaging give valuable diagnostic values in managing the penetrating skull base injury. Early intervention for removal of the foreign body and repair of the CSF leak is advocated to prevent catastrophic complication.
description: EXCLI Journal; 18:Doc223; ISSN 1611-2156
title: Excerpts of Remarks Prepared for Delivery by U.S. Secretary of Transportation John A. Volpe Before the Licensed Beverage Industry
Creators: name: Volpe, John A.
name: United States Department of Transportation
Publisher: name: United States Department of Transportation
publisherIdentifier: https://ror.org/02xfw2e90
publisherIdentifierScheme: ROR
Year: 1971
Subjects: classificationCode: https://trt.trb.org/term/90593
subject: Safety and security
classificationCode: https://trt.trb.org/term/87909
subject: Air transportation
classificationCode: https://trt.trb.org/term/88892
subject: Air transportation policy

description: See the Secretary of Transportation Speeches Collection's finding aid at: https://ntl.as.atlas-sys.com/repositories/2/resources/4
description: Excerpts of Remarks Prepared for Delivery by U.S. Secretary of Transportation John A. Volpe Before the Licensed Beverage Industry, the Plaza Hotel, New York, New York, Wednesday, January 27, 1971 at 12 noon EST.
Affrontare lo studio della genetica attraverso l'utilizzo delle Wisconsin Fast PlantsTM
Creators: name: Bottini, Annamaria
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2015

description: Trattare gli argomenti previsti dal piano di formazione per la genetica in modo attivo e coinvolgente è possibile. Le Wisconsin Fast PlantsTM permettono di portare il tema complesso della genetica a una dimensione più vicina agli allievi, stimolando in loro curiosità e interesse. Queste piante, caratterizzate da un ciclo vitale rapido, permettono di seguire la trasmissione dei caratteri fenotipici da una generazione all’altra. Una condizione che rende possibile svolgere in classe un’indagine scientifica che ha lo scopo di coinvolgere attivamente gli allievi. Fare scienze significa porre l’allievo al centro del processo di apprendimento, educandolo alla responsabilità e dandogli la possibilità di esplorare con i propri sensi la realtà. Utilizzare in classe le Wisconsin Fast PlantsTM permette all’allievo di diventare più autonomo e sviluppare competenze sociali relative al dialogo e alla cooperazione. Lavorare a un progetto comune, pone gli allievi in una condizione di interdipendenza, in cui ogni membro del gruppo diventa indispensabile per il raggiungimento di un obiettivo comune. Un altro vantaggio di questo approccio sperimentale è quello di dare un senso di continuità al progetto, accrescendo la motivazione e l’impegno degli allievi per la riuscita dello stesso. Proporre in classe, durante le ore di tronco comune, un’attività di laboratorio è vantaggioso e permette agli allievi di sviluppare competenze fondamentali utili sia nel contesto scolastico che nella vita di tutti i giorni. Relatore: Mattia Rossi. Materia: Scienze.
Gentrification without displacement : determining the costs
Creators: name: Moguin, Aaron
Publisher: name: University of British Columbia
Year: 2020

description: Around the world, the global flow of capital often influences urban growth in ways that can be disadvantageous to residents. Outside investment in a city’s residential real estate destabilizes the equilibrium of local housing supply and residents’ ability to afford it. One of the attractors of this capital, the renewal and expansion of existing housing stock through demolition and reconstruction, often involuntarily displaces these residents. This changes behaviour in ways that are less mentally and physically healthy, more environmentally harmful, and consume more resources. However, this also creates new supply, which by responding to rising demand, helps affordability and replaces aging housing, improving resilience, accessibility, safety, resource consumption and environmental impact. This investigation asks: 1. What would the financial cost be to mitigate or eliminate involuntary displacement while still allowing creation of new housing supply and upgrading of the built environment? 2. How feasible, and successful, are some solutions that could enable this? 3. What are some strategies that would maximize its feasibility and success? The neighbourhood of Metrotown, in greater Vancouver, Canada, was identified as an ideal case area in which to examine these questions. A prototypical land development project was synthesized from empirical data and used to test various valuations of displacement elimination as well as alternatives to involuntary displacement. It was found that even under favourable market conditions for redevelopment, all strategies tested for full displacement elimination are not financially feasible under typical for-profit scenarios and expectations. Some voluntary displacement scenarios are shown to be financially viable, although less socially and environmentally feasible. To allow full displacement elimination, project costs must be further reduced, revenue increased, or profit targets reduced. It is shown that eliminating 50% of required parking reduces costs, increasing profit while encouraging sustainable behaviour and reducing material usage and embodied carbon. However, to achieve full financial feasibility, a typical for-profit project under these market, social and jurisdictional conditions must shift even more costs away from the developer to be able to afford full displacement elimination while allowing all advantages of new and additional housing construction and local upgrading to occur.
Isospin effects on the mass dependence of balance energy
Creators: name: Gautam, Sakshi
name: Sood, Aman D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the effect of isospin degree of freedom on balance energy throughout the mass range between 50 and 350 for two sets of isotopic systems with N/Z = 1.16 and 1.33 as well as isobaric systems with N/Z = 1.0 and 1.4. Our findings indicate that different values of balance energy for two isobaric systems may be mainly due to the Coulomb repulsion. We also demonstrate clearly the dominance of Coulomb repulsion over symmetry energy.
description: 5 pages, 3 figures In this version the discussion is in terms of N/Z whereas in the journal the whole discussion is in terms of N/A. The conclusions remain unaffected
title: Remarks Prepared for Delivery by Secretary of Transportation John A. Volpe for a Briefing on the Fiscal Year 1972 Budget
Creators: name: Volpe, John A.
name: United States Department of Transportation
Publisher: name: United States Department of Transportation
publisherIdentifier: https://ror.org/02xfw2e90
publisherIdentifierScheme: ROR
Year: 1971
Subjects: classificationCode: https://trt.trb.org/term/88918
subject: Legislation
classificationCode: https://trt.trb.org/term/91519
subject: Institutional issues
classificationCode: https://trt.trb.org/term/92116
subject: Federal government

description: See the Secretary of Transportation Speeches Collection's finding aid at: https://ntl.as.atlas-sys.com/repositories/2/resources/4
description: Remarks Prepared for Delivery by Secretary of Transportation John A. Volpe for a Briefing on the Fiscal Year 1972 Budget, Thursday, January 28, 1971, Washington, D.C.
Triplon mean-field analysis of an antiferromagnet with degenerate Shastry-Sutherland ground states
Creators: name: Kumar, Rakesh
name: Kumar, Brijesh
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We look into the quantum phase diagram of a spin-$\frac{1}{2}$ antiferromagnet on the square lattice with degenerate Shastry-Sutherland ground states, for which only a schematic phase diagram is known so far. Many exotic phases were proposed in the schematic phase diagram by the use of exact diagonalization on very small system sizes. In our present work, an important extension of this antiferromagnet is introduced and investigated in the thermodynamic limit using triplon mean-field theory. Remarkably, this antiferromagnet shows a stable plaquette spin-gapped phase like the original Shastry-Sutherland antiferromagnet, although both of these antiferromagnets differ in the Hamiltonian construction and ground state degeneracy. We propose a sublattice columnar dimer phase which is stabilized by the second and third neighbor antiferromagnetic Heisenberg exchange interactions. There are also some commensurate and incommensurate magnetically ordered phases, and other spin-gapped phases which find their places in the quantum phase diagram. Mean-field results suggest that there is always a level-crossing phase transition between two spin gapped phases, whereas in other situations, either a level-crossing or a continuous phase transition happens.
Are there any good digraph width measures?
Creators: name: Ganian, Robert
name: Hliněný, Petr
name: Kneis, Joachim
name: Meister, Daniel
name: Obdržálek, Jan
name: Rossmanith, Peter
name: Sikdar, Somnath
Publisher: name: arXiv
Year: 2010
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: Several different measures for digraph width have appeared in the last few years. However, none of them shares all the "nice" properties of treewidth: First, being \emph{algorithmically useful} i.e. admitting polynomial-time algorithms for all $\MS1$-definable problems on digraphs of bounded width. And, second, having nice \emph{structural properties} i.e. being monotone under taking subdigraphs and some form of arc contractions. As for the former, (undirected) $\MS1$ seems to be the least common denominator of all reasonably expressive logical languages on digraphs that can speak about the edge/arc relation on the vertex set.The latter property is a necessary condition for a width measure to be characterizable by some version of the cops-and-robber game characterizing the ordinary treewidth. Our main result is that \emph{any reasonable} algorithmically useful and structurally nice digraph measure cannot be substantially different from the treewidth of the underlying undirected graph. Moreover, we introduce \emph{directed topological minors} and argue that they are the weakest useful notion of minors for digraphs.
title: Statement by Secretary of Transportation John A. Volpe at a News Conference
Creators: name: Volpe, John A.
name: United States Department of Transportation
Publisher: name: United States Department of Transportation
publisherIdentifier: https://ror.org/02xfw2e90
publisherIdentifierScheme: ROR
Year: 1971
Subjects: classificationCode: https://trt.trb.org/term/92013
subject: Transit operating agencies
classificationCode: https://trt.trb.org/term/87936
subject: Public transit
classificationCode: https://trt.trb.org/term/91999
subject: Railroads
classificationCode: https://trt.trb.org/term/89768
subject: Transportation planning

description: See the Secretary of Transportation Speeches Collection's finding aid at: https://ntl.as.atlas-sys.com/repositories/2/resources/4
description: Statement by Secretary of Transportation John A. Volpe at a News Conference, Thursday, January 28, 1971, Washington, D.C.
Emergency Department - Wait Time Prediction
Creators: name: Dushica, Adriatik
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2018

description: Oggigiorno sempre più enti (pubblici / privati) come ospedali, uffici postali o call center offrono ai propri pazienti / clienti una previsione del tempo d’attesa. L’Ente Ospedaliero Cantonale (EOC), più precisamente il pronto soccorso (PS) dell’Ospedale Civico di Lugano (OCL) richiede la realizzazione di un modello predittivo in grado di fornire ai propri pazienti il tempo d’attesa. Attualmente questa informazione viene fornita dall’infermiere che effettua il triage, il quale attraverso anni d’esperienza, è in grado di fornire indicativamente una stima del tempo d’attesa. Stima che a seconda delle urgenze, può variare nel tempo. Complessivamente sono stati analizzati 3 modelli in grado di prevedere il tempo d’attesa. Il primo modello analizzato è Moving Average, ampiamente utilizzato per l’analisi e lo studio di serie storiche. Il secondo modello prevede l’impiego di Lasso, una regressione lineare in grado di effettuare automaticamente la regolarizzazione e la selezione delle features rilevanti. Il terzo e ultimo modello, ovvero quello che ha prodotto i migliori risultati è una Neural Network Regression (NNR), una regressione con rete neurale in grado di apprendere modelli matematico-statistici attraverso il training. La rete neurale è stata utilizzata in due diverse applicazioni: la prima viene mostrata attraverso un monitor in pronto soccorso e permette di visualizzare in tempo reale l’attesa prevista per ogni paziente, la seconda è un’applicazione web, che permette ai singoli pazienti di visualizzare in maniera pratica e funzionale il tempo d’attesa stimato. Il risultato è un prototipo che nei prossimi mesi subirà una validazione da parte del personale del pronto soccorso, dopo la quale avverrà l’effettiva messa in produzione.
Smallholder Farmers’ Challenges of Coping with COVID-19 Containments: Insights from two food regions in Indonesia
Creators: name: Stöber, Silke
name: Adinata, K.
name: Ramba, T.
name: Paganini, N.
name: Sulejmanović, N.
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: COVID-19
subject: food security
subject: smallholder farmers
subject: coping
subject: food prices
subject: Indonesia
subject: 630 Landwirtschaft und verwandte Bereiche

description: The COVID-19 pandemic has forced governments around the world to impose containment measures to prevent the rapid spread of the corona virus. The Indonesian government implemented “large-scale social restrictions,” which have impacted farming and farmers’ food security. Farmers are both producers and consumers of food and, therefore, have been facing new challenges due to transport restrictions, price spikes for inputs, price drops for their produce, or conditions which aggravated cooperation, such as social distancing. This study aims at analysing the challenges of the containments from a smallholder farmer perspective and examining farmers’ coping potential. A digital survey with 323 farmers has been designed as comparative observational research in Toraja, South Sulawesi, and selected regions of Java. The Bonferroni Multiple Comparison Test was used to test for significance regarding socioeconomic factors and space. A logistic regression model extracted determinants for crisis coping. Results reveal, that female farmers worry more about COVID-19 outbreak compared to men at a significant level. In contrast, male farmers, particularly in Java, are more concerned about social restrictions due to limited mobility. Food price spikes were reported in both regions, with sharp increases for fish, fruits, and vegetables in Java, for staples in Toraja, and for meat and sugar in both regions. Food groups, that trade through agents and brokers or are transported longer distances were affected most due to their complex and long supply chains that were disrupted during the restrictions. In Java, farmers face multiple shocks, of which climate change was reported even more often than the pandemic related shocks. Not being able to help each other on the farm due to social distancing is a significant concern of farmers in Toraja. As a result of food market disturbances, farmers began to grow and eat more vegetables and fruits. In conclusion, food security for farmers slightly decreased due to affordability, and market disruptions already point to long-term income losses. The study team recommends to promote smallholders’ healthy food production, value addition and direct end-consumer linkages to build back better their livelihoods post- COVID-19.
title: Excerpts of Remarks for Delivery by U.S. Secretary of Transportation John A. Volpe Before the 17th Regional Conference on Highway Safety Sponsored by the Ontario Department of Transport
Creators: name: Volpe, John A.
name: United States Department of Transportation
Publisher: name: United States Department of Transportation
publisherIdentifier: https://ror.org/02xfw2e90
publisherIdentifierScheme: ROR
Year: 1971
Subjects: classificationCode: https://trt.trb.org/term/90602
subject: Highway safety
classificationCode: https://trt.trb.org/term/92157
subject: Highway safety organizations
classificationCode: https://trt.trb.org/term/88213
subject: Highway travel

description: See the Secretary of Transportation Speeches Collection's finding aid at: https://ntl.as.atlas-sys.com/repositories/2/resources/4
description: Excerpts of Remarks for Delivery by U.S. Secretary of Transportation John A. Volpe Before the 17th Regional Conference on Highway Safety Sponsored by the Ontario Department of Transport, Chateau Laurier Hotel, Ottawa, Canada, Friday, January 29, 1971, 12:30 P.M.
title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ Ð²ÑÑÐ¾ÐºÐ¾Ð¹ ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÑ Ð½Ð° ÑÐ¾Ð¿ÑÐ¾ÑÐ¸Ð²Ð»ÐµÐ½Ð¸Ðµ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸ ÑÐ»ÐµÐºÑÑÐ¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¾Ðº
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Studying the effect of high temperature on the resistance of insulation of electrical wires
Creators: name: ÐÐ¾Ð½Ð¾Ð¼Ð°ÑÐµÐ², ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: ÐÐ¾Ð¶Ð°ÑÑ
ÐÐ¾Ð¶Ð°ÑÐ½Ð°Ñ Ð¾Ñ ÑÐ°Ð½Ð°
ÐÐ°Ð±ÐµÐ»Ð¸
ÑÐ¾Ðº ÑÑÐµÑÐºÐ¸ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸
Ð¸ÑÐ¿ÑÑÐ°Ð½Ð¸Ñ ÐºÐ°Ð±ÐµÐ»Ñ
Ð¸ÑÐ¿ÑÑÐ°Ð½Ð¸Ðµ Ð¿Ð¾Ð»Ð¸Ð²Ð¸Ð½Ð¸Ð»Ñ Ð»Ð¾ÑÐ¸Ð´Ð°

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿Ð¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ ÐºÐ°Ð±ÐµÐ»ÑÐ½Ð¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸ Ð² ÑÑÐ»Ð¾Ð²Ð¸ÑÑ Ð¿Ð¾Ð¶Ð°ÑÐ°. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ Ð²Ð¸Ð´Ñ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸, Ð¿ÑÐ¸Ð¼ÐµÐ½ÑÐµÐ¼ÑÐµ Ð² Ð Ð¾ÑÑÐ¸Ð¸. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½Ñ Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ñ ÑÐ¾ÐºÐ° ÑÑÐµÑÐºÐ¸ ÐºÐ°Ð±ÐµÐ»ÑÐ½Ð¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸. ÐÐ¾Ð´Ð²ÐµÐ´ÐµÐ½Ñ Ð¸ÑÐ¾Ð³Ð¸ Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ð¹. ÐÐ°Ð½Ñ ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¸ Ð¿Ð¾ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÐºÐ°Ð±ÐµÐ»ÐµÐ¹ Ð² ÑÐ¸ÑÑÐµÐ¼Ð°Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸.
description: In this paper, a study of the behavior of cable insulation in a fire. The main types of insulation used in Russia are considered. The cable insulation leakage current was measured. The results of measurements are summed up. Recommendations on the use of cables in security systems are given.
Strong lensing in the MareNostrum Universe II: scaling relations and optical depths
Creators: name: Fedeli, C.
name: Meneghetti, M.
name: Gottloeber, S.
name: Yepes, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The strong lensing events that are observed in compact clusters of galaxies can, both statistically and individually, return important clues about the structural properties of the most massive structures in the Universe. Substantial work is ongoing in order to understand the degree of similarity between the lensing cluster population and the population of clusters as a whole, with members of the former being likely more massive, compact, and substructured than members of the latter. In this work we exploit synthetic clusters extracted from the {\sc MareNostrum Universe} cosmological simulation in order to estimate the correlation between the strong lensing efficiency and other bulk properties of lensing clusters, such as the virial mass and the bolometric X-ray luminosity. We found that a positive correlation exist between all these quantities, with the substantial scatter being smaller for the luminosity-cross section relation. We additionally used the relation between the lensing efficiency and the virial mass in order to construct a synthetic optical depth that agrees well with the true one, while being extremely faster to be evaluated. We finally estimated what fraction of the total giant arc abundance is recovered when galaxy clusters are selected according to their dynamical activity or their X-ray luminosity. Our results show that there is a high probability for high-redshift strong lensing clusters to be substantially far away from dynamical equilibrium, and that $30-40\%$ of the total amount of giant arcs are lost if looking only at very X-ray luminous objects.
description: 15 pages, 10 figures. Accepted by A&A
Momentum and Hamiltonian in Complex Action Theory
Creators: name: Nagao, Keiichi
name: Nielsen, Holger Bech
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the complex action theory (CAT) we explicitly examine how the momentum and Hamiltonian are defined from the Feynman path integral (FPI) point of view based on the complex coordinate formalism of our foregoing paper. After reviewing the formalism briefly, we describe in FPI with a Lagrangian the time development of a $ξ$-parametrized wave function, which is a solution to an eigenvalue problem of a momentum operator. Solving this eigenvalue problem, we derive the momentum, Hamiltonian, and Schrödinger equation. Oppositely, starting from the Hamiltonian we derive the Lagrangian in FPI, and we are led to the momentum relation again via the saddle point for $p$. This study confirms that the momentum and Hamiltonian in the CAT have the same forms as those in the real action theory. We also show the third derivation of the momentum relation via the saddle point for $q$.
description: Latex 42 pages, 2 figures, references added, typo corrected, the final version to appear in IJMPA. (v5)The errors and typos mentioned in the erratum of IJMPA are corrected
title: „Neu Sehen“ im Frankfurter Städel und als Katalog ist ein kleines Juwel. Eine Ausstellung über die Fotografie der 1920er und 30er Jahre
Creators: name: Stoll, Mareike
Publisher: name: ZZF - Leibniz-Zentrum für Zeithistorische Forschung: Visual History
Year: 2021

description: In Frankfurt am Main ist noch bis zum 24. Oktober 2021 eine ganz besonders lohnenswerte Ausstellung zur Fotografie der deutschen Zwischenkriegszeit zu sehen. Sie macht durch Ausstellungsgestaltung und fundiert aufbereitete Hintergrundinformationen große Lust, die fotografischen Schmuckstücke „neu zu sehen“ und den Sammlungsbestand (unter Ergänzung einzelner Leihgaben) näher in den Blick zu nehmen. Der Kuratorin Kristina Lemke ist mit dieser Ausstellung etwas Wunderbares gelungen. Ein Besuch lohnt sich sehr – mit Zeit zum genauen Hinsehen erschließt diese Ausstellung neues Terrain, denn selten wird dem fotografischen Abzug an sich so viel Aufmerksamkeit und Hinwendung zuteil. Es handelt sich um ein kleines Ausstellungsjuwel; insbesondere in der Zusammenschau mit dem im Kerber Verlag erschienenen Katalog offenbart sich die fundierte Recherche.
Soil, crop yield, and cost trade-offs of organic nutrient management strategies across mixed vegetable farms in southwest British Columbia
Creators: name: Norgaard, Amy
Publisher: name: University of British Columbia
Year: 2020

description: Nitrogen (N) and phosphorus (P) are essential for crop growth but degrade the environment when lost from farming systems. While conventional farms have capacity to precisely calculate nutrient budgets based on the nutrient content of synthetic fertilizers, organic nutrient sources have inconsistent and difficult to predict nutrient supply. The objectives of this study were to: (1) inventory amendment and soil properties across three regions of southwest British Columbia (lower Fraser Valley (FV), Pemberton Valley (PV), and Vancouver Island (VI)), and (2) evaluate effects of three nutrient management strategies on 20 farms across these regions on crop yields, economics (input costs), and selected soil properties (permanganate oxidizable carbon (POx-C), post-season available N and P). Nutrient strategies evaluated were: ‘high compost’ (HC): compost applied to meet crop N removal, ‘low compost + N’ (LC+N): compost applied to meet crop P removal plus an organic fertilizer to meet crop N removal, and ‘typical’ (TYP): the typical nutrient application used by the farmer (varying combinations of composts and organic fertilizers). While I found no differences in POx-C among nutrient management strategies, I did find HC had higher yields in the FV. However, principal components analysis (PCA) showed that HC was also associated with high post-season available N when high N composts and manures were used. Input costs tended to be least expensive in the lower Fraser Valley region, where TYP was less expensive than either HC or LC+N. The PCAs also showed that there was enhanced yield and POx-C values with LC+N when composts with high carbon to N ratios (C:N) were used. However, in regions where high nutrient composts are relatively inexpensive, productivity and economic incentives encourage practices that contribute to high soil P and post-season available N. The results of this study highlight the trade-offs between environmental and economic goals; even though organic farmers have land stewardship in mind, decisions are still largely influenced by economic principles, while in the bounds of organic regulations.
Connecting Synchrotron, Cosmic Rays, and Magnetic Fields in the Plane of the Galaxy
Creators: name: Jaffe, T. R.
name: Banday, A. J.
name: Leahy, J. P.
name: Leach, S.
name: Strong, A. W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We extend previous work modeling the Galactic magnetic field in the plane using synchrotron emission in total and polarised intensity. In this work, we include a more realistic treatment of the cosmic-ray electrons using the GALPROP propagation code optimized to match the existing high-energy data. This addition reduces the degeneracies in our previous analysis and when combined with an additional observed synchrotron frequency allows us to study the low-energy end of the cosmic-ray electron spectrum in a way that has not previously been done. For a pure diffusion propagation, we find a low-energy injection spectrum slightly harder than generally assumed; for J(E) \propto E^α, we find α = -1.34 \pm 0.12, implying a very sharp break with the spectrum above a few GeV. This then predicts a synchrotron brightness temperature spectral index, β, on the Galactic plane that is -2.8 < β < -2.74 below a few GHz and -2.98 < β < -2.91 up to 23 GHz. We find that models including cosmic-ray re-acceleration processes appear to be incompatible with the synchrotron data.
description: 12 pages, 10 figures. Accepted for publication in MNRAS. This research was supported by the Agence Nationale de la Recherche (ANR-08-CEXC-0002-01)
title: Excerpts of Remarks Prepared for Delivery by Secretary of Transportation John A. Volpe to the Electronic Industries Association
Creators: name: Volpe, John A.
name: United States Department of Transportation
Publisher: name: United States Department of Transportation
publisherIdentifier: https://ror.org/02xfw2e90
publisherIdentifierScheme: ROR
Year: 1971
Subjects: classificationCode: https://trt.trb.org/term/96734
subject: Electronics
classificationCode: https://trt.trb.org/term/91507
subject: Mobility

description: See the Secretary of Transportation Speeches Collection's finding aid at: https://ntl.as.atlas-sys.com/repositories/2/resources/4
description: Excerpts of Remarks Prepared for Delivery by Secretary of Transportation John A. Volpe to the Electronic Industries Association at the Statler-Hilton Hotel, Washington, D.C., Wednesday, March 10, 1971, 9:30 P.M.
title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÑÐ½ÐºÐ° Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼ Ð´Ð»Ñ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ Ð½Ð° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸ ÐÐÐ "ÐÐµÐ´Ð¸ÐºÑÐ¾ÑÐ³"
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Market research information systems for the implementation of the company LLC "Mediktorg"
Creators: name: ÐÑÐ´Ð¸Ð»Ð¾Ð², ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: Ð°Ð½Ð°Ð»Ð¸Ð·
ÐºÐ¾Ð½ÐºÑÑÐµÐ½ÑÐ½Ð°Ñ ÑÑÐµÐ´Ð°
Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð½ÑÐµ Ð¿ÑÐ¾Ð´ÑÐºÑÑ
erp-ÑÐ¸ÑÑÐµÐ¼Ð°
ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ°Ñ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ
ÐºÐ¾ÑÐ¿Ð¾ÑÐ°ÑÐ¸Ð²Ð½ÑÐµ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÐµ ÑÐ¸ÑÑÐµÐ¼Ñ (ÐºÐ¸Ñ)
analysis
competitive environment
software products
erp-system
economic efficiency
corporate information systems (cis)

description: ÐÐ±ÑÐµÐºÑÐ¾Ð¼ ÑÐ²Ð»ÑÐµÑÑÑ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ñ ÐÐÐ Â«ÐÐµÐ´Ð¸ÐºÑÐ¾ÑÐ³Â».
Ð¦ÐµÐ»ÑÑ Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ ÑÐ²Ð»ÑÐµÑÑÑ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÑÐ½ÐºÐ° Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼ Ð´Ð»Ñ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ Ð½Ð° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¸ ÐÐÐ Â«ÐÐµÐ´Ð¸ÐºÑÐ¾ÑÐ³Â». 
ÐÐ»Ñ Ð´Ð¾ÑÑÐ¸Ð¶ÐµÐ½Ð¸Ñ Ð¿Ð¾ÑÑÐ°Ð²Ð»ÐµÐ½Ð½Ð¾Ð¹ ÑÐµÐ»Ð¸ Ð² ÑÐ°Ð±Ð¾ÑÐµ ÑÐµÑÐµÐ½Ñ ÑÐ»ÐµÐ´ÑÑÑÐ¸Ðµ Ð·Ð°Ð´Ð°ÑÐ¸.ÐÑÐ¸Ð²ÐµÐ´ÐµÐ½ ÑÑÐ°Ð²Ð½Ð¸ÑÐµÐ»ÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· Ð½Ð°Ð¸Ð±Ð¾Ð»ÐµÐµ Ð¿Ð¾Ð¿ÑÐ»ÑÑÐ½ÑÑ Ð² Ð½Ð°ÑÑÐ¾ÑÑÐµÐµ Ð²ÑÐµÐ¼Ñ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½ÑÑ Ð¿ÑÐ¾Ð´ÑÐºÑÐ¾Ð² Ð´Ð»Ñ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð³Ð¾ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ ÐºÐ»Ð°ÑÑÐ¾Ð², Ð²Ð¼ÐµÑÑÐµ Ñ ÑÑÐ¸Ð¼ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÐºÐ¾Ð½ÐºÑÑÐµÐ½ÑÐ½Ð¾Ð¹ ÑÑÐµÐ´Ñ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸ ÐÐÐ Â«ÐÐµÐ´Ð¸ÐºÑÐ¾ÑÐ³Â». Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¿ÑÐµÐ¸Ð¼ÑÑÐµÑÑÐ²Ð° Ð¸ Ð½ÐµÐ´Ð¾ÑÑÐ°ÑÐºÐ¸ ERP-ÑÐ¸ÑÑÐµÐ¼Ñ, Ð¿ÑÐµÐ´Ð»Ð°Ð³Ð°ÐµÐ¼Ð¾Ð¹ Ð´Ð»Ñ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½ ÑÐ°ÑÑÑÑ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¾Ð¹ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ ÐÐÐ¡ Ð½Ð° ÐÐÐ Â«ÐÐµÐ´Ð¸ÐºÑÐ¾ÑÐ³Â», Ð¸Ð· ÐºÐ¾ÑÐ¾ÑÐ¾Ð³Ð¾ Ð¼Ð¾Ð¶Ð½Ð¾ ÑÐ´ÐµÐ»Ð°ÑÑ Ð²ÑÐ²Ð¾Ð´ ÑÑÐ¾, Ð¿ÑÐ¾ÐµÐºÑ ÑÑÑÐµÐºÑÐ¸Ð²ÐµÐ½.
description: The object is LLC Medicortorg.
The aim of the final qualification work is to research the market of information systems for implementation at the LLC Medicortorg enterprise.
To achieve this goal, the following tasks were solved: A comparative analysis of the currently most popular software products for the implementation of organizational management information systems of various classes is given, along with this, an analysis of the competitive environment of LLC Medicortg is carried out. The advantages and disadvantages of the ERP-system proposed for implementation are considered. The calculation of the economic efficiency of the implementation of CIS in LLC "Medicorg" was carried out, from which we can conclude that the project is effective.
The algebraic numbers definable in various exponential fields
Creators: name: Kirby, Jonathan
name: Macintyre, Angus
name: Onshuus, Alf
Publisher: name: arXiv
Year: 2011
Subjects: subject: Logic (math.LO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We prove the following theorems: Theorem 1: For any E-field with cyclic kernel, in particular $\mathbb C$ or the Zilber fields, all real abelian algebraic numbers are pointwise definable. Theorem 2: For the Zilber fields, the only pointwise definable algebraic numbers are the real abelian numbers.
Crimini d’arte Il falso tra genio e follia
Creators: name: Tumminello, Simone
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2022

description: Il falso ci affascina e si impone, in qualche modo, davanti a noi. Questa è stata la prima motivazione che mi ha spinto a intraprendere questo progetto di tesi. La storia della falsificazione è profondamente legata a quella del collezionismo d’arte. Generi artistici, tecniche stilistiche e iconografie cristallizzate nel tempo riprendono vita attraverso l’abilità e l’ingegno del falsario. Quest’ultima, figura enigmatica e controversa che per vendetta, fama, potere ed espressione di genio decide di ingannare l’intero mondo dell’arte. Il progetto vuole ripercorrere la storia e le motivazioni che spingono queste figure, dal fascino oscuro, ma dotate di uno straordinario talento, a realizzare inganni perfetti al fine di sfidare i cosiddetti “esperti”. Il progetto vuole essere un racconto visivo, un’esperienza visionaria, che ha una relazione con la storia di alcuni falsari nel mondo dell’arte. Intendo rivolgere il mio progetto di tesi a un pubblico di designer interessati alla narrazione visiva ed estetica, all’editoria, ma anche a un pubblico più vasto di persone incuriosite dal tema del crimine artistico. La realizzazione di questo progetto inizia con una ricerca teorica che va a delineare e circoscrivere il rapporto tra falso, copia e originale, per andare a comprenderne le peculiarità. Successivamente, attraverso una ricerca di contenuti sono stati definiti i protagonisti di questo racconto per poi concludere con la progettazione e il design dell’artefatto finale. Il progetto di design ha risposto alle domande di ricerca, creando un’esperienza in chi sfoglia l’artefatto. I possibili sviluppi futuri del progetto prevedono di integrare maggiormente le note biografiche e la possibilità di implementare il numero di protagonisti del racconto.
Dark Matter that can form Dark Stars
Creators: name: Gondolo, P.
name: Huh, Ji-Haeng
name: Kim, Hyung Do
name: Scopel, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The first stars to form in the Universe may be powered by the annihilation of weakly interacting dark matter particles. These so-called dark stars, if observed, may give us a clue about the nature of dark matter. Here we examine which models for particle dark matter satisfy the conditions for the formation of dark stars. We find that in general models with thermal dark matter lead to the formation of dark stars, with few notable exceptions: heavy neutralinos in the presence of coannihilations, annihilations that are resonant at dark matter freeze-out but not in dark stars, some models of neutrinophilic dark matter annihilating into neutrinos only and lighter than about 50 GeV. In particular, we find that a thermal DM candidate in standard Cosmology always forms a dark star as long as its mass is heavier than about 50 GeV and the thermal average of its annihilation cross section is the same at the decoupling temperature and during the dark star formation, as for instance in the case of an annihilation cross section with a non-vanishing s-wave contribution.
description: 17 pages, 4 figures, figure 1 fixed
title: Excerpts of Remarks Prepared for Delivery by U.S. Secretary of Transportation John A. Volpe Before the Council of Lake Erie Ports
Creators: name: Volpe, John A.
name: United States Department of Transportation
Publisher: name: United States Department of Transportation
publisherIdentifier: https://ror.org/02xfw2e90
publisherIdentifierScheme: ROR
Year: 1971
Subjects: classificationCode: https://trt.trb.org/term/88891
subject: Transportation policy

description: See the Secretary of Transportation Speeches Collection's finding aid at: https://ntl.as.atlas-sys.com/repositories/2/resources/4
description: Excerpts of Remarks Prepared for Delivery by U.S. Secretary of Transportation John A. Volpe Before the Council of Lake Erie Ports, Hotel Congressional, Washington, D.C., Tuesday, March 16, 1971, 8:30 A.M.
Voliamo insieme…
Creators: name: Perucchi, Elisa
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2017

description: Oggigiorno viviamo in una società prettamente individualista, dove c’è la tendenza a pensare a sé stessi e non al bene comune. Il lavoro di docente riveste una notevole importanza, non solo per quanto riguarda gli aspetti disciplinari, ma anche nel facilitare lo sviluppo di competenze trasversali, in effetti ha il compito di formare e accompagnare i bambini nel loro percorso di crescita a 360 gradi. Per avere in futuro degli adulti altruisti risulta fondamentale poter lavorare sul gruppo classe e in particolare approfondire le dinamiche presenti all’interno dell’aula. Nel percorso riportato in questa tesi di Bachelor sono state dapprima proposte delle attività di narrazione attraverso l’utilizzo di una metafora. Gli allievi per mezzo di alcuni disegni, hanno creato il proprio gabbiano e attraverso questa rappresentazione di sé hanno narrato di loro stessi e hanno permesso a loro stessi di conoscersi meglio, così come ai compagni e alla docente. I bambini sono poi stati invitati a esplicitare le dinamiche vigenti nel gruppo attraverso una rappresentazione sociometrica, in seguito hanno svolto alcune attività con lo scopo di promuovere un senso di appartenenza al gruppo e instaurare relazioni di fiducia. In conclusione hanno creato il loro stormo ideale. L’analisi qualitativa, i prodotti, le discussioni e i momenti di colloquio individuale hanno permesso di confermare quanto sia importante e utile prevedere opportunità per verbalizzare e riflettere sul gruppo.
Spitzer Infrared Spectrograph survey of young stars in the Chamaeleon I star-forming region
Creators: name: Manoj, P.
name: Kim, K. H.
name: Furlan, E.
name: McClure, M. K.
name: Luhman, K. L.
name: Watson, D. M.
name: Espaillat, C.
name: Calvet, N.
name: Najita, J. R.
name: D'Alessio, P.
name: Adame, L.
name: Sargent, B. A.
name: Forrest, W. J.
name: Bohac, C.
name: Green, J. D.
name: Arnold, L. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present 5 to 36 micron mid-infrared spectra of 82 young stars in the ~2 Myr old Chamaeleon I star-forming region, obtained with the Spitzer Infrared Spectrograph (IRS). We have classified these objects into various evolutionary classes based on their spectral energy distributions and the spectral features seen in the IRS spectra. We have analyzed the mid-IR spectra of Class II objects in Chamaeleon I in detail, in order to study the vertical and radial structure of the protoplanetary disks surrounding these stars. We find evidence for substantial dust settling in most protoplanetary disks in Chamaeleon I. We have identified several disks with altered radial structures in Chamaeleon I, among them transitional disk candidates which have holes or gaps in their disks. Analysis of the silicate emission features in the IRS spectra of Class II objects in Chamaeleon I shows that the dust grains in these disks have undergone significant processing (grain growth and crystallization). However, disks with radial holes/gaps appear to have relatively unprocessed grains. We further find the crystalline dust content in the inner (< 1-2 AU) and the intermediate (< 10 AU) regions of the protoplanetary disks to be tightly correlated. We also investigate the effects of accretion and stellar multiplicity on the disk structure and dust properties. Finally, we compare the observed properties of protoplanetary disks in Cha I with those in slightly younger Taurus and Ophiuchus regions and discuss the effects of disk evolution in the first 1-2 Myr.
description: 80 pages, 32 Figures, Accepted for publication in the Astrophysical Journal Supplement Series
Cavity evolution in relativistic self-gravitating fluids
Creators: name: Herrera, L.
name: Denmat, G. Le
name: Santos, N. O.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We consider the evolution of cavities within spherically symmetric relativistic fluids, under the assumption that proper radial distance between neighboring fluid elements remains constant during their evolution (purely areal evolution condition). The general formalism is deployed and solutions are presented. Some of them satisfy Darmois conditions whereas others present shells and must satisfy Israel conditions, on either one or both boundary surfaces. Prospective applications of these results to some astrophysical scenarios is suggested.
description: 10 pages Revtex. To appear in Class. Quantum Grav.
L’approccio basato sui compiti nell’insegnamento delle L2 nella scuola media
Creators: name: Antognoli, Paola
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2016

description: In questa ricerca si è voluto capire da un lato se la metodologia TBL favorisce l’arricchimento lessicale della L2 e dall’altro se, grazie alle attività dell’approccio basato sui compiti, si riesce ad accrescere la motivazione degli allievi. Si è stilato dapprima il quadro teorico di questo nuovo metodo, il cui obiettivo è quello di immergere gli allievi in situazioni reali di comunicazione: l’allievo impara facendo e si concentra su situazioni di vita quotidiana (organizzare una gita, scambiare informazioni personali…) che vengono trasformate in compiti pedagogici. Si sono poi descritte quattro attività TBL proposte in una prima media e ne sono stati esaminati i risultati. Le registrazioni di alcune presentazioni mostrano un chiaro miglioramento nell’espressione orale tra l’inizio e la fine dell’esperienza. Nei documenti scritti dei vari gruppi si incontrano sintagmi verbali e nominali non ancora presentati in classe. I risultati ottenuti potrebbero dimostrare dunque l’efficacia di questa pratica. Attraverso un questionario si è testata l’opinione degli allievi; dai dati raccolti risulta che il metodo TBL riscuote un alto indice di gradimento: la totalità degli intervistati ha dichiarato di apprezzare il lavoro di gruppo e il 90,4% predilige queste attività rispetto agli esercizi tradizionali. Viste le implicazioni positive dell’approccio basato sui compiti, è mia intenzione proporre regolarmente attività di questo tipo da integrare nella mia programmazione. Relatrice. Chiara Antonini. Materie: francese e inglese
Energetics and electronic structure of phenyl-disubstituted polyacetylene: A first-principles study
Creators: name: Sony, Priya
name: Shukla, Alok
name: Ambrosch-Draxl, Claudia
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Phenyl-disubstituted polyacetylene (PDPA) is an organic semiconductor which has been studied during the last years for its efficient photo-luminescence. In contrast, the molecular geometry, providing the basis for the electronic and optical properties, has been hardly investigated. In this paper, we apply a density-functional-theory based molecular-dynamics approach to reveal the molecular structure of PDPA in detail. We find that oligomers of this material are limited in length, being stable only up to eight repeat units, while the polymer is energetically unfavorable. These facts, which are in excellent agreement with experimental findings, are explained through a detailed analysis of the bond lengths. A consequence of the latter is the appearance of pronounced torsion angles of the phenyl rings with respect to the plane of the polyene backbone, ranging from $55^{\circ}$ up to $95^{\circ}$. We point out that such large torsion angles do not destroy the conjugation of the $π$ electrons from the backbone to the side phenyl rings, as is evident from the electronic charge density.
description: 9 pages, 7 figures, accepted for publication in Phys. Rev. B
title: Droplet evaporation on smooth patterns
Creators: name: Ewetola, Michael
Publisher: name: The Open University
Year: 2021

description: Controlling the shape and location of evaporating droplets on a solid surface is critical in a variety of industrial applications where droplet dynamics is important. Ink-jet printing, display technologies, DNA analysis, lab-on-a-chip device design, coating, micropatterning, and heat transfer are examples. This thesis investigates how to control droplet evaporation on smooth surfaces with well-defined patterns. The evaporation of a two-dimensional droplet on a solid surface is initially investigated. The solid is flat, but there are smooth chemical variations that cause a space-dependent local contact angle. We conduct a detailed bifurcation analysis of the droplet’s equilibrium properties as its size changes, observing the emergence of a hierarchy of bifurcations that is strongly dependent on the underlying chemical pattern. Symmetric and periodic patterns give rise to a series of pitchfork and saddle-node bifurcations, causing stable solutions to become saddle nodes. This change in stability under dynamic conditions implies that any perturbation in the system can cause the droplet to shift laterally while relaxing to the nearest stable point in a snap event, as confirmed by numerical computations of the Cahn-Hilliard and Navier-Stokes systems of equations. Also, with asymmetric patterns we are able to effectively control droplet evaporation. This enables the investigation of the effect of wetting strength and droplet properties such as size, viscosity, and surface tension on the snap speed of evaporating droplets on a smooth pattern. We investigate the interaction of chemical and topographical patterns on non-planar surfaces. We discover that combining periodic chemical and topographical patterns can either amplify or annihilate snap effects. A well-defined wetting pattern can also be used to control the direction of evaporating droplets on a non-planar surface. Gravity’s effect on evaporating droplets on a flat surface with periodic wetting patterns is also investigated. Gravity changes the shape of a droplet by increasing its radius and decreasing its height while keeping its size constant. As it evaporates on an incline plane with a symmetric chemical pattern, a droplet will prefer to move in the direction of gravity. However, it is discovered that when the effect of gravity is weaker than the strength of the wetting pattern, a droplet can be made to move in the opposite direction dictated by gravity on an asymmetric pattern with amplitude gradient.