cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Influence of Varied Stem Maturity on Rooting of Caribbean Oregano (Lippia micromera S.)
Creators: name: Espaillat, J.R.
name: French, E.C.
name: West, S.H.
name: Espaillat, J.R.
name: French, E.C.
name: West, S.H.
Publisher: name: Unknown
Year: 1992
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Different stages of vegetative maturity influence rooting potential of sten-i cuttings. Oregano is in high demand in the international herb market. Four experiments were conducted in spring and fall of 1990 and I 991 to: 1) detennine optimum stem maturity stage for cutting propagation of Caribbean oregano (Lippia micromera S. ), and 2) determine seasonal differences in its rooting capabilities. Hardwood main stems, hardwood secondary sterns, softwood stem tips, and semi-hardwood stern tips were plac_ed upright in perlite using a hotbed. Bottom heat temperature was 28°C for all exp. At 21 days, shoot growth (SG), and root length (RL) ratings and rooting percent data showed highly significant difference between stem cuttings. Softwood stem tips gave plants with the best shoot growth and root system regardless of the season. Increased wood maturity negatively influenced rooting potential for fall propagated cuttings.
$Z$-boson hadronic decay width up to $\mathcal{O}(α_s^4)$-order QCD corrections using the single-scale approach of the principle of maximum conformality
Creators: name: Huang, Xu-Dong
name: Wu, Xing-Gang
name: Zheng, Xu-Chang
name: Yu, Qing
name: Wang, Sheng-Quan
name: Shen, Jian-Ming
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the paper, we study the properties of the $Z$-boson hadronic decay width by using the $\mathcal{O}(α_s^4)$-order quantum chromodynamics (QCD) corrections with the help of the principle of maximum conformality (PMC). By using the PMC single-scale approach, we obtain an accurate renormalization scale-and-scheme independent perturbative QCD (pQCD) correction for the $Z$-boson hadronic decay width, which is independent to any choice of renormalization scale. After applying the PMC, a more convergent pQCD series has been obtained; and the contributions from the unknown $\mathcal{O}(α_s^5)$-order terms are highly suppressed, e.g. conservatively, we have $ΔΓ_{\rm Z}^{\rm had}|^{{\cal O}(α_s^5)}_{\rm PMC}\simeq \pm 0.004$ MeV. In combination with the known electro-weak (EW) corrections, QED corrections, EW-QCD mixed corrections, and QED-QCD mixed corrections, our final prediction of the hadronic $Z$ decay width is $Γ_{\rm Z}^{\rm had}=1744.439^{+1.390}_{-1.433}$ MeV, which agrees with the PDG global fit of experimental measurements, $1744.4\pm 2.0$ MeV.
description: 7 pages, 3 figures
Extending Maps with Semantic and Contextual Object Information for Robot Navigation: a Learning-Based Framework using Visual and Depth Cues
Creators: name: Martins, Renato
name: Bersan, Dhiego
name: Campos, Mario F. M.
name: Nascimento, Erickson R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper addresses the problem of building augmented metric representations of scenes with semantic information from RGB-D images. We propose a complete framework to create an enhanced map representation of the environment with object-level information to be used in several applications such as human-robot interaction, assistive robotics, visual navigation, or in manipulation tasks. Our formulation leverages a CNN-based object detector (Yolo) with a 3D model-based segmentation technique to perform instance semantic segmentation, and to localize, identify, and track different classes of objects in the scene. The tracking and positioning of semantic classes is done with a dictionary of Kalman filters in order to combine sensor measurements over time and then providing more accurate maps. The formulation is designed to identify and to disregard dynamic objects in order to obtain a medium-term invariant map representation. The proposed method was evaluated with collected and publicly available RGB-D data sequences acquired in different indoor scenes. Experimental results show the potential of the technique to produce augmented semantic maps containing several objects (notably doors). We also provide to the community a dataset composed of annotated object classes (doors, fire extinguishers, benches, water fountains) and their positioning, as well as the source code as ROS packages.
description: Preprint version of the article to appear at Journal of Intelligent & Robotic Systems (2020)
Coherent Vector Meson Photo-Production from Deuterium at Intermediate Energies
Creators: name: Rogers, T. C.
name: Sargsian, M. M.
name: Strikman, M. I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the cross section for vector meson photo-production off a deuteron for the intermediate range of photon energies starting at a few GeVs above the threshold and higher. We reproduce the steps in the derivation of the conventional non-relativistic Glauber expression based on an effective diagrammatic method while making corrections for Fermi motion and intermediate energy kinematic effects. We show that, for intermediate energy vector meson production, the usual Glauber factorization breaks down and we derive corrections to the usual Glauber method to linear order in longitudinal nucleon momentum. The purpose of our analysis is to establish methods for probing interesting physics in the production mechanism for phi-mesons and heavier vector mesons. We demonstrate how neglecting the breakdown of Glauber factorization can lead to errors in measurements of basic cross sections extracted from nuclear data.
description: 41 pages, 13 figures, figure 9 is compressed from previous version, typos fixed
title: The content and stable isotopic composition of carbon in spherical micrometeorites
Creators: name: Yates, Paul David
Publisher: name: The Open University
Year: 1993

description: Micrometeorites are extraterrestrial bodies that have survived atmospheric entry to be found on Earth as grains <1mm in diameter. Of the annual flux of extraterrestrial material to the Earth ca.99% is supplied by the micrometeorites. The lifetime of the micrometeroids in the interplanetary medium in extremely ephemeral, but their population is maintained largely by ejection of particles from cometary nuclei and from collisional debris from the asteroid belt. As such, the micrometeorites are of fundemental importance to cosmogony, because they may provide the only means, at present, to directly study cometary material, and sample a far less biased cross section of the asteroid belt than conventional meteorites.

A static gas source mass spectrometer for carbon isotope measurements built in the Planetary Sciences Unit has been tested and shown capable of routinely analysing ca.1 nanogram of carbon (as carbon dioxide) to precisions of ca.±1‰. To enable this gain in sensitivity to be exploited, a sample preparation and carbon dioxide extraction system has been devised that typically imparts a total of less than 20 nanograms of extraneous carbon contamination to the samples. An advantage of the mass spectrometer is its ability to make accurate isotopic abundance measurements of the blank contribution for the purpose of making corrections to the analytical data. The instrument and inlet system has been applied to studies of micrometeorites >200∝m in diameter.

A procedure has been developed involving three analytical techniques (chemical/petrographic, X-ray diffraction and stable carbon isotope). Carbon isotopic analyses of multiple-sample aliquots of deep-sea, and individual Greenland and Antarctic micrometeorites has enabled the identification of components that are similar to those within the stony chondritic meteorites. More specifically, components have been revealed that may indicate a generic connection to primitive chondrites. Carbon isotopic characterisation of acid-resistant residues prepared from micrometeorite-rich Greenland cryoconite suggested that the micrometeorites contain pre-solar dust grains of silicon carbide, graphite and diamond. which provides an additional indication of the primitive nature of some micrometeorites. Experiments to produce micrometeorite analogues by pulse-heating microgram-sized samples of whole-rock meteorites showed that indigenous carbonaceous species can survive pulse-heating above their normal combustion temperatures. The overall conclusion of the investigation is that the flux of >200∝m micrometeorites is dominated by a steroidal material and that the atmospheric entry heating process is poorly understood.
AQUACULTURE IN TRANSITION: VALUE CHAIN TRANSFORMATION, FISH AND FOOD SECURITY IN MYANMAR
Creators: name: Belton, Ben
name: Hein, Aung
name: Htoo, Kyan
name: Kham, L. Seng
name: Nischan, Ulrike
name: Reardon, Thomas
name: Boughton, Duncan
name: Belton, Ben
name: Hein, Aung
name: Htoo, Kyan
name: Kham, L. Seng
name: Nischan, Ulrike
name: Reardon, Thomas
name: Boughton, Duncan
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: International Development
subject: Fish farming
subject: Myanmar

description: Fish farming (aquaculture) is important to Myanmar’s food security and is developing and transforming quickly. This study presents findings from a new field survey of the farmed fish value chain that is more detailed and broader than any previous study conducted in Myanmar. Many of our findings are at odds with what we perceive as conventional wisdom about fish farming in Myanmar. The findings have important policy implications to unlock the sector’s full growth potential and food security contributions.
Risk Sharing in Corporate and Public Finance: The Contribution of Islamic Finance
Creators: name: Bacha, Obiyathulla Ismath
name: Mirakhor, Abbas
name: Askari, Hossein
Publisher: name: PSL Quarterly Review
Year: 2015
Subjects: subject: Islamic finance, risk sharing, risk shifting, financial inclusion, equity, debt, leverage
subject: G32, P43, O16

description: Financial crises have become a recurring problem for modern economies with increasingly detrimental fallouts. Risk-sharing finance (RSF) contracts may be the best instrument for addressing the problem and its fallout, and in particular the risk-sharing principles of Islamic finance offer a potential alternative. This paper offers some preliminary thoughts on the design and implementation of RSF for both private and public sector funding, for revenue and non-revenue generating projects. It is argued that such form of financing avoids the leverage of conventional debt, minimizes the costs of dilution, reduces macroeconomic vulnerability, and enhances financial inclusion. It also has the potential to be a less risky alternative for developing countries to finance public spending and economic growth. JEL Classifications: G32, P43, O16
description: PSL Quarterly Review, V. 68, N. 274 (2015)
Ensayo de Híbridos y Variedades de Maíz (Zea mays L.) del Programa UNPHU de Mejoramiento
Creators: name: Comalat Rodes, Pedro
name: Richard Ortiz, José
name: Comalat Rodes, Pedro
name: Richard Ortiz, José
Publisher: name: Unknown
Year: 1992
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Con d ohjctivo princípal de huscar un aumento suhstancial de rendímiento en el cultívo dd maíz t:n la República Domínicana.a fin de poder competir con los precios a que se vende el maíz importado a través de la Ley PL-480, en la Finca Experimental de Nigua de la Universidad Nacional Pedro Henríquez Ureña, se ha efectuado una evaluación de 41 materiales de maíz correspondientes a hibridos y variedades obtenidos en su mayor parte en la propia finca. Para el fin perseguido se está trabajando sobre los efectos aditivos utilizando métodos de selección recurrente, en la obtención de nuevos hibridos convencionales mediante el cruzamiento de líneas seleccionadas y con buena habilidad combinatoria, además utilizando ambos procedimientos para juntar en materiales el mejoramiento debido a efectos aditivos y el correspondiente al vigor híbrido mediante el cruzamiento de lúteas cuyas fuentes han sido de variedades mejoradas trabajando sobre los efectos aditivos. Nueve de los híbridos generados y una variedad de polinización abierta, ambas obtenidas en la Universidad, han superado al híbrido simple comercial introducido 3214, tropical pero originario de una empresa semi llera de los Estados Unidos de Norteamérica.
Context-Aware Collaborative-Intelligence with Spatio-Temporal In-Sensor-Analytics in a Large-Area IoT Testbed
Creators: name: Chatterjee, Baibhab
name: Seo, Dong-Hyun
name: Chakraborty, Shramana
name: Avlani, Shitij
name: Jiang, Xiaofan
name: Zhang, Heng
name: Abdallah, Mustafa
name: Raghunathan, Nithin
name: Mousoulis, Charilaos
name: Shakouri, Ali
name: Bagchi, Saurabh
name: Peroulis, Dimitrios
name: Sen, Shreyas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Decades of continuous scaling has reduced the energy of unit computing to virtually zero, while energy-efficient communication has remained the primary bottleneck in achieving fully energy-autonomous IoT nodes. This paper presents and analyzes the trade-offs between the energies required for communication and computation in a wireless sensor network, deployed in a mesh architecture over a 2400-acre university campus, and is targeted towards multi-sensor measurement of temperature, humidity and water nitrate concentration for smart agriculture. Several scenarios involving In-Sensor-Analytics (ISA), Collaborative Intelligence (CI) and Context-Aware-Switching (CAS) of the cluster-head during CI has been considered. A real-time co-optimization algorithm has been developed for minimizing the energy consumption in the network, hence maximizing the overall battery lifetime of individual nodes. Measurement results show that the proposed ISA consumes ~467X lower energy as compared to traditional Bluetooth Low Energy (BLE) communication, and ~69,500X lower energy as compared with Long Range (LoRa) communication. When the ISA is implemented in conjunction with LoRa, the lifetime of the node increases from a mere 4.3 hours to 66.6 days with a 230 mAh coin cell battery, while preserving more than 98% of the total information. The CI and CAS algorithms help in extending the worst-case node lifetime by an additional 50%, thereby exhibiting an overall network lifetime of ~104 days, which is >90% of the theoretical limits as posed by the leakage currents present in the system, while effectively transferring information sampled every second. A web-based monitoring system was developed to archive the measured data in a continuous manner, and to report anomalies in the measured data.
description: 15 pages with author info, 18 figures
The Use of Full-Sib Recurrent Selection in the Improvement of an Open Pollinated Corn Population for Use in Sustainable Agricultural Systems
Creators: name: Espaillat, J. R
name: Gallaher, R N.
name: West, S.H.
name: Espaillat, J. R
name: Gallaher, R N.
name: West, S.H.
Publisher: name: Unknown
Year: 1992
Subjects: Crop Production/Industries
Environmental Economics and Policy
Research and Development/Tech Change/Emerging Technologies

description: Synthetic varieties of Corn (Zea mays L.) are better buffered against environmental stresses in sustainable agricultural systems than cu.itivars with a narrow genetic base. A full-sib (FS) recurrent selection (RS) program was started at the University of Florida using a tropical open pollinated com population The goal was to develop a synthetic with a broad genetic base suitable to be grown during the fall in north-central Florida under conservation practices. Full-sib crosses were made in the spring of 1987. Then, in August a progeny test was planted in a randomized complete block design with si..x replications. Collected data included; ear, husk, and grain weight, insect damage (ID), whole plant yield (WY), seed and leaf N percent, and plant height. Analyses included ANOV A, correlations (r), heritabilities, and frequency distribution. There were differences betweenFS families for most of the traits. Ear weiglit (EW) was highly positively r (+ r) with yield and plant height traits. Ear weight was negatively r (-r) with ID and+ r with leaf N percent of FS families. Tip ID was -r with husk weight. Heritability varied for all traits. The mean EW of the FS were higher than the parents and the Pioneer hybrid X-304C. Selection for EW improved WY, earworm (Heliotliis zea L.) tolerance and N uptake.
LE CRITT GUADELOUPE ET LE TISSU AGRO-INDUSTRIEL GUADELOUPEEN
Creators: name: Mauranyapin, J.P.
name: Parfait, A.
name: Littee, E.
name: Mauranyapin, J.P.
name: Parfait, A.
name: Littee, E.
Publisher: name: Unknown
Year: 1989
Subjects: Agribusiness
Research and Development/Tech Change/Emerging Technologies
Teaching/Communication/Extension/Profession

description: Un Centre Régional d'Innovation et de Transfert de Technologie (CRITT) a été crée en Guadeloupe. Le domaine d'activité correspond aux industries agricoles et alimentaires. L'inventaire des compétences scientifiques et techniques a été fait sur la région. L'analyse des résultats montre que la situation n'est pas analogue à celle des pays industrialisés. Des structures d'appui technologiques sont mis en place pour l'amélioration de la relation Recherche-Industrie. Les principaux moyens visent à renforcer la capacité en expérimentation (plate-forme) et en analyse (laboratoire professionnel). La formule associative permet une collaboration entre tous les acteurs : offreurs et demandeurs de technologie, collectivités locales et Etat. -----A regional Center for Innovation and Technology Transfer (CRITT) was created in Guadeloupe. Agro industry is the specific area. The local inventory of scientific and technical competences was drawn up. This case is not similar with these of industrialized lands. To improve the research - Industry relation technological bases are created - The main means are used for plat form and analysis. Association allow cooperation between all the actors : furnisher and user, local organization and government.
CHOIX ET PROPAGATION DE NOUVELLES VARIETES DE CANNE A SUCRE EN GUADELOUPE
CHOICE AND PROPAGATION OF NEW VARIETIES OF SUGARCANE IN GUADELOUPE
Creators: name: Douchez, M.
name: Douchez, M.
Publisher: name: Unknown
Year: 1989
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Au cours du cycle de 10 années d'expérimentations variétales poursuivies sur de nombreux champs d'essais et des séries d'une canne plantée et 4 rejets successifs, le Centre Technique Interprofessionnel de la Canne et du Sucre a étudié les performances de nombreux clones de canne à sucre introduits depuis des stations d'hybridation de Barbade, Guadeloupe (I RAT), Réunion et République Indienne. Par comparaison des clones anciens des années 50 cultivés traditionnellement en grandes surfaces dans l'Ile, les augmentations de productivité atteignent en tonnes de sucre/hectare/an 20 % en zones moins humides et 24 % en zones humides pour deux variétés de milieu et fin de récolte : B.80 08 et R.570. Barbade B.69 566 peut être utilisée très avantageusement en canne précoce de début de récolte en raison de sa forte richesse saccharine. Le C.T.I.C.S. s'emploie à propager ces trois variétés en utilisant des vitroplants en première génération des pépinières pour garantir un bon état phytosanitaire des boutures. ----- Over the last ten years of varietal experimentation and of new plus four ratoons cultivations gave the Interprofessional Center for sugarcane (CT1CS) the opportunity of studying the performances of many clones introduced from breeding stations of Barbados, Guadeloupe (IRAT), Réunion and India. Regarding clones of the fifties as control in traditional cultivation at large scale over the island, two varities (B. 8008 medium, R.570 late cycle) increased productivity to 24 % more in the humide zone and 20 % in the less humid zone. Barbados B. 69566 can be used very profitably as an early cane et the begining of the harvest, owing to its high sugar content. The CTICS in involved is the propagation of these three varieties through first generation nuseries with in vitro plantlets in order to warrant the good phytosanitary condition of the cuttings.
Fully coherent energy loss effects on light hadron production in pA collisions
Creators: name: Arleo, François
name: Cougoulic, Florian
name: Peigné, Stéphane
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We single out the role of fully coherent induced gluon radiation on light hadron production in pA collisions. The effect has the same general features as for quarkonium production, however with a richer color structure as the induced radiation depends on the global color charge of the partonic subprocess final state. Baseline predictions for light hadron nuclear suppression in pPb collisions at the LHC are provided, taking into account only the effect of fully coherent energy loss, which proves to be of the same order of magnitude as gluon shadowing or saturation. This underlines the need to include fully coherent energy loss in phenomenological studies of hadron production in pA collisions.
description: 30 pages, 9 figures
c=1 Boundary Conformal Field Theory Revisited
Creators: name: Kristjansson, K. R.
name: Thorlacius, L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Correlation functions of discrete primary fields in the c=1 boundary conformal field theory of a scalar field in a critical periodic boundary potential are computed using the underlying SU(2) symmetry of the model. Bulk amplitudes are unambigously determined and we give a prescription for amplitudes involving discrete boundary fields.
description: LaTex, 8 pages, 1 figure, uses IOP style files. To appear in the proceedings of the RTN workshop "The quantum structure of spacetime and the geometric nature of fundamental interactions", Copenhagen, September 15-20, 2003
title: Molecular and ontogenic analysis of the mammalian GABAA receptor
Creators: name: Sutherland, Margaret Lloy
Publisher: name: The Open University
Year: 1998

description: γ-aminobutyric acid is the major inhibitory neurotransmitter in the adult mammalian central nervous system (CNS) and may also play a neurotrophic role during CNS development. Diversification of GABAA receptor mediated responses are in part a result ofvariation in subunit composition in the receptor complex. This variation arises both from the number of different subtypes of GABAA receptor subunits (α1-6, β1-4, γ1-3, δ1, ρ1-3, ε, ρ), as well as from post-transcriptional processes such as RNA splicing. In this thesis, I have investigated the developmental onset of GABAA receptor gene expression and the distribution and temporal expression of GABAA receptor subunit mRNAs and 12 splice variants within the developing and adult murine CNS.

Preliminary studies using S 1 nuclease protection analysis demonstrated that α1, β3 and γ2 were the predominant subtypes of GABAA receptor subunits expressed at embryonic day 14 and in the adult murine CNS. In situ hybridisation analysis demonstrated overlapping but distinct spatial and temporal patterns of GABAA subunit mRNA expression during postnatal development and in the adult murine CNS. Analysis of γ2 mRNA splice variants demonstrated that the γ2S transcript is the predominant γ2 mRNA expressed during latter stages of embryo genesis, while the γ2L transcript is the predominant γ2 isoform present inthe adult CNS.

Since there is a 29 to 47 percent amino acid identity among the various GABAA receptor subunits, I have also demonstrated through site-directed mutagenesis studies, that changes in a conserved amino acid in the cysteine loop of the bovine a 1 GABAA receptor subunit resulted in a loss of agonist and antagonist binding (DI49N), while a change in a conserved amino acid in the M1 transmembrane domain of the bovine α1 GABAA receptor subunit resulted in loss of agonist binding and reduction in the Bmax and Kd for antagonist binding (P243A). 'These results are in contrast to the effect of identical mutations in the bovine β1 subunit and suggest that if the pentameric GABAA receptor assembly is composed of (α1)2(β1)1(γ2)2, then changes in highly conserved amino acids in the α1 receptor subunit would have a greater distortion on the structure of the receptor complex.
Il patrimonio immobiliare dello “Istituto Nazionale di Astrofisica” di proprietà e in uso a qualsiasi titolo. Quadro complessivo della consistenza.
Creators: name: PORTA, FRANCESCA ROMANA
name: BARTONE, ELISABETTA
name: DE FILIPPIS, LIANA
name: RAGO, Matteo
name: BELLASSAI, Giancarlo
name: DI CICCO, Nicola
name: INAMO, DAVIDE
name: LIGGIO, Giovanni
name: MATTANA, Simone
name: MIGLIETTA, Luciano
name: PACINELLI, Lucio Primo
Publisher: name: Direzione Generale
Year: 2021

description: Il rapporto intende restituire il quadro complessivo della consistenza del patrimonio immobiliare dello “Istituto Nazionale di Astrofisica” alla data di giugno 2021 a conclusione delle attività peritali, sia ai fini inventariali che ai fini assicurativi, di tutti gli immobili e/o complessi immobiliari detenuti a qualsiasi titolo dall'Istituto. Il rapporto descrive inoltre le attività del "Tavolo Tecnico Permanente per il Patrimonio Immobiliare e i Lavori Pubblici" finalizzate al censimento e, quindi, alla completa e analitica conoscenza dell'intero Patrimonio Immobiliare dell'Ente.
Controlling many-body effects in the midinfrared gain and THz absorption of quantum cascade laser structures
Creators: name: Pereira, M. F.
name: Lee, S. -C.
name: Wacker, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A many-body theory based on nonequilibrium Green functions, in which transport and optics are treated on a microscopic quantum mechanical basis, is used to compute gain and absorption in the optical and THz regimes in quantum cascade laser structures. The relative importance of Coulomb interactions for different intersubband transitions depends strongly on the spatial overlap of the wavefunctions and the specific nonequilibrium populations within the subbands. The magnitude of the Coulomb effects can be controlled by changing the operation bias.
Evidence for Gravitational Infall of Matter onto the Super-Massive Black Hole in the quasar PG 1211+143?
Creators: name: Reeves, J. N.
name: Pounds, K.
name: Uttley, P.
name: Kraemer, S.
name: Mushotzky, R
name: Yaqoob, T.
name: George, I. M.
name: Turner, T. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the detection of redshifted iron K-alpha absorption lines in the Chandra LETG spectrum of the narrow-line quasar, PG 1211+143. The absorption lines are observed at 4.22 keV and 4.93 keV in the quasar spectrum, corresponding to 4.56 keV and 5.33 keV in the rest frame of PG 1211+143. From Monte Carlo simulations, the chance probability of both lines being false detections is low at 1.36e-04. Highly redshifted ionized iron K-alpha (Fe XXV or Fe XXVI) is the most plausible identification for the lines at their observed energies. If identified with H-like iron K-alpha at 6.97 keV, then the relativistic velocity shifts required are 0.40c and 0.26c. The extreme velocities can be explained by pure gravitational redshift if the matter exists in a stable orbit within 6 gravitational radii of the black hole. This would require a Kerr metric for the black hole. Alternatively the absorption may be the result of matter infalling directly onto the black hole, with a maximum observed velocity of 0.38c at 6Rg in the Schwarzschild metric. This matter may originate in a failed outflow or jet, which does not escape the gravitational potential of the black hole.
description: 14 pages, including 3 figures. Acccepted for publication in Astrophysical Journal Letters
The growth of novel thin film oxides : calibrations, preliminary growths and quantitative characterizations
Creators: name: Wicks, Ryan Christopher
Publisher: name: University of British Columbia
Year: 2011

description: In this thesis, preliminary growths of SrCu0₂ epitaxial films were undertaken. Despite none of the growths yielding the desired stoichiometry or oxidation, the difficulties that were encountered, such as properly oxidizing the film, are demonstrated to be surmountable. The structure of the films was probed with RHEED, and found to display growth patterns that are consistent with epitaxial growth. The desire to perform future ARPES studies on this material imposes strict sample quality requirements and the need for the most accurate measurements of stoichiometry possible. This warranted an investigation of the properties of the SPECS PHOIBOS 150 hemispherical electron analyzer used to perform XPS measurements of films chemistry. The degree of non-linearity of the electron detection system was determined and a method introduced that could correct for it. Correcting for the transmission function of the analyzer was found to be a necessary step in quantitative chemical analysis. Therefore, transmission functions were measured using two techniques and were found to be in good agreement with calculated transmission functions provided by SPECS. While correcting for detector non-linearity and measuring the actual transmission function did not drastically alter the stoichiometry measurements for scans taken using reasonable analyzer settings for XPS (1% for the films grown in this thesis, mostly from detector non-linearity), it is possible to drive the analyzer into regimes where the corrections will be necessary. The methods used to first correct for the intensity response of the analyzer, and then the transmission function would be more applicable in these instances. The work performed in this thesis will ensure that future growths of SrCu0₂ films will yield samples of adequate quality to perform an ARPES study.
THE INTRODUCTION OF ALOE VERA TO TOBAGO AS A COMMERCIAL CROP
L'INTRODUCTION D'ALOE VERA A TOBAGO POUR UNE CULTURE COMMERCIALE
Creators: name: Collins, P.
name: Imbert, M.
name: Collins, P.
name: Imbert, M.
Publisher: name: Unknown
Year: 1989
Subjects: Agribusiness
Crop Production/Industries
International Development

description: The co-operation between the Caribbean Industrial Research Institute (CARIRI), the Caribbean Agricultural Research and Development Institute (CARDI) and the Tobago House of Assembly in preliminary research work on Aloe vera led to the development of a Co-operative which now processes Aloe vera gel commercially. Current research and future perspectives are summarized. The future of this innovation work is linked to opening of market, complementary to the locally existing ones (drinks, yoghurt...), above all for export (cosmetic products, freezedried gel), to improvement of fertilization and weeding while monitoring the residues, and also to diversifying the activities of the cooperative. ----- La coopération entre l'Institut de Recherche Industriel Caraïbe (CARIBI), l'Institut de Recherche et de développement Agricole Caraïbe (CARDI) et la Chambre de l'Assemblée de Tobago, conduit, à partir d'un travail de recherche préliminaire, à la mise en place d'une Coopérative qui traite aujourd'hui commercialement du gel d'Aloe vera. La recherche en cours et les perspectives prochaines sont résumées. L'avenir de cette innovation tient à l'ouverture de marchés complémentaires à ceux existants localement (boissons, yaourt...) notamment en exportation (cosmétique, gel congelé), à l'amélioration de la fertilisation et du déherbage en suiveillant les résidus et aussi à la diversification des activités de la coopérative.
D-branes in Standard Model building, Gravity and Cosmology
Creators: name: Kiritsis, Elias
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: D-branes are by now an integral part of our toolbox towards understanding nature. In this review we will describe recent progress in their use to realize fundamental interactions. The realization of the Standard Model and relevant physics and problems will be detailed. New ideas on realizing 4-dimensional gravity use the brane idea in an important way. Such approaches will be reviewed and compared to the standard paradigm of compactification. Branes can play a pivotal role both in early- and late-universe cosmology mainly via the brane-universe paradigm. Brane realizations of various cosmological ideas (early inflation, sources for dark matter and dark energy, massive gravity etc) will be also reviewed.
description: 132 pages, 7 eps figures, LateX, feynmf package. This version will appear in Physics Reports. It contains new sections on concrete interesecting brane orientifolds, brane-antibrane cosmology and cosmological brane-bulk energy exchange
Macroeconomic effects of high interest rate policy: Mexico’s experience
Creators: name: Lopez Gallardo, Julio
name: Valencia Arriaga, Roberto
Publisher: name: PSL Quarterly Review
Year: 2015
Subjects: subject: Inflation targeting, Mexico, Interest rate, Exchange rate
subject: E52, E11, E12, E43

description: We study the effects of the high interest rate policy implemented in Mexico under the inflation targeting (IT) scheme on the price level and on GDP and its components. We specify a macroeconomic model inspired by the theory of the effective demand, and on this basis we demonstrate, through comparative statics, the complex set of relationships between the variables involved, and the chain of reactions that a shock to the interest rate is likely to provoke. Our main conclusions show that an interest rate rise may be instrumental to control inflation. However, this rise contributes to appreciate the exchange rate, which is the main channel through which inflation is tamed. Currency appreciation raises the share of wages in GDP even as it reduces the debt service of firms indebted in dollars. It follows that the interest rate rise may have, under certain conditions, an indirect positive impact on output. Thus, our results diverge from those entailed by the theory that is at the basis of the inflation-targeting strategy, and even from some contemporary non-conventional approaches. JEL Classifications: E52, E11, E12, E43
description: PSL Quarterly Review, V. 68, N. 274 (2015)
Optical tests of Bell's inequalities not resting upon the absurd fair sampling assumption
Creators: name: Santos, Emilio
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A simple local hidden-variables model is exhibited which reproduces the results of all performed tests of Bell\'{}s inequalities involving optical photon pairs. For the old atomic-cascade experiments, like Aspect\'{}s, the model agrees with quantum mechanics even for ideal set-ups. For more recent experiments, using parametric down-converted photons, the agreement occurs only for actual experiments, involving low efficiency detectors. Arguments are given against the fair sampling assumption, currently combined with the results of the experiments in order to claim a contradiction with local realism. New tests are proposed which are able to discriminate between quantum mechanics and a restricted, but appealing, family of local hidden-variables models. Such tests require detectors with efficiencies just above 20%.
description: 19 pages
LCSR analysis of exclusive two-body B decay into charmonium
Creators: name: Melic, Blazenka
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze B -> K H_c (where H_c = eta_c, J/psi, chi_{cJ(J=0,1)}) decays estimating nonfactorizable contributions from the light-cone sum rules (LCSR). Nonfactorizable contributions are sizable for B -> K J/psi and particularly for B -> K chi_{c1} decay. For the B decays into a (pseudo)scalar charmonia we find small nonfactorizable contributions which cannot accommodate relatively large branching ratios obtained by measurements. This specially concerns the puzzling B -> K chi_{c0} decay.
description: 9 pages, LaTeX
I Lavori Pubblici nello “Istituto Nazionale di Astrofisica” nel triennio 2020 - 2022. Approvazione del “Programma Triennale Lavori Pubblici dello "Istituto Nazionale di Astrofisica" Triennio 2020-2022, "Elenco dei Lavori” per l’anno 2020, ed “Elenco degli interventi sotto 100 mila euro”.
Creators: name: BARTONE, ELISABETTA
name: PORTA, FRANCESCA ROMANA
name: DE FILIPPIS, LIANA
name: BELLASSAI, Giancarlo
name: DI CICCO, Nicola
name: INAMO, DAVIDE
name: LIGGIO, Giovanni
name: MATTANA, Simone
name: MIGLIETTA, Luciano
name: PACINELLI, Lucio Primo
name: RAGO, Matteo
Publisher: name: Direzione Generale
Year: 2021

description: Il documento ha la finalità di approfondire gli elementi necessari per l’approvazione definitiva degli interventi da inserire nel “Programma Triennale dei Lavori Pubblici 2020-2022", in particolare nell’“Elenco dei Lavori” per l’anno 2020, così come adottato e pubblicato dall’Ente, ratificando la proposta avanzata dal “Tavolo Tecnico Permanente per il Patrimonio Immobiliare e i Lavori Pubblici” e volto alla riqualificazione, gestione, recupero, attraverso una attenta e corretta programmazione, dell’ingente patrimonio immobiliare dell’Ente, caratterizzato prevalentemente da strutture di grande pregio storico, artistico, scientifico e paesaggistico.
Pah and Mid-IR Luminosities as Measures of Star-Formation Rate in Spitzer First Look Survey Galaxies
Creators: name: Wu, H.
name: Cao, C.
name: Hao, C. -N.
name: Liu, F. -S.
name: Wang, J. -L.
name: Xia, X. -Y.
name: Deng, Z. -G.
name: Young, C. -K. -S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present evidence that the 8 $μ$m (dust) and 24 $μ$m luminosities of star-forming galaxies are both strongly correlated with their 1.4 GHz and H$α$ luminosities over a range in luminosity of two-to-three orders of magnitude. At the bright end, the correlations are found to be essentially linear over a luminosity range of about two orders of magnitude (corresponding to star-formation rates of several-tenths to several tens of solar masses per year). However, at the faint end, there appears to be a slope change for dwarf galaxies, possibly due to the lower dust-to-gas ratios and lower metallicities of the dwarfs. The correlations suggest that PAH features and mid-IR continuum emissions are good measures of the star formation rates of galaxies, and we present calibrations of star-formation rates based on existing radio and H$α$ relations. Our findings are based on a sample of star-forming galaxies selected from the main field of the Spitzer First Look Survey with the aid of spectroscopic data from the Sloan Digital Sky Survey and VLA 1.4 GHz data.
description: 7 pages, 2 Postscript figures, published by ApJ Letter
Uncertainty Quantification of Ship Resistance via Multi-Index Stochastic Collocation and Radial Basis Function Surrogates: A Comparison
Creators: name: Piazzola, Chiara
name: Tamellini, Lorenzo
name: Pellegrini, Riccardo
name: Broglia, Riccardo
name: Serani, Andrea
name: Diez, Matteo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper presents a comparison of two methods for the forward uncertainty quantification (UQ) of complex industrial problems. Specifically, the performance of Multi-Index Stochastic Collocation (MISC) and adaptive multi-fidelity Stochastic Radial Basis Functions (SRBF) surrogates is assessed for the UQ of a roll-on/roll-off passengers ferry advancing in calm water and subject to two operational uncertainties, namely the ship speed and draught. The estimation of expected value, standard deviation, and probability density function of the (model-scale) resistance is presented and discussed; the required simulations are obtained by the in-house unsteady multi-grid Reynolds Averaged Navier-Stokes (RANS) solver $χ$navis. Both MISC and SRBF use as multi-fidelity levels the evaluations on the different grid levels intrinsically employed by the RANS solver for multi-grid acceleration; four grid levels are used here, obtained as isotropic coarsening of the initial finest mesh. The results suggest that MISC could be preferred when only limited data sets are available. For larger data sets both MISC and SRBF represent a valid option, with a slight preference for SRBF, due to its robustness to noise.
Lensless imaging of red blood cells using coherent soft x-ray scattering
Creators: name: Nazerzadeh-Yazdi, Arvin
Publisher: name: University of British Columbia
Year: 2011

description: I am reporting on lensless imaging of human red blood cell using coherent x-ray scattering (CXS) technique. The successful microfabrication of a sample-mask structure using focused ion beam (FIB) milling was the key element in this imaging technique. The sample-mask structure is 600 - 800 nm gold films deposited using sputtering or electron beam evaporation on Si₃N₄ membrane windows. We used commercially available 100 nm thick Si₃N₄ membranes held by 3 mm diameter silicon frames that are designed for use in transmission electron microscopy. The red blood cell (RBC) sample was mounted in front of a 3 μm hole milled through both gold and Si₃N₄ layers on the opposite side. Three smaller reference apertures with diameters 300, 250 and 200 nm on the gold side were milled all the way through both layers at a distance of 9 am center-to center from the sample aperture. These holes are used for holographic lensless x-ray imaging. It was found that a gold surface roughens during ion milling due to a sputter instability and which produces cup-like features with a characteristic length up to few hundred nm. We found apertures milled through gold films deposited by sputtering show good circularity and sidewall roughness of 20 nm. We present result on CXS measurements in transmission geometry near Fe L₃₋ and C K-absorption edges on a single RBC. We captured high resolution images of the sample by simple Fourier inversion of the recorded far-field scattered intensity. We found 8.5 % reduction in the transmission intensity near Fe L₃₋edge due to presence of Fe in the form of hemoglobin molecules inside RBC. This absorption agrees with estimated agrees well with the estimated value of 9 % within experimental uncertainty. From limited data measured below C K-edge we measured a presence of at least 300 nm thick carbon inside RBC which lies in the range of the estimated value of 1.8 μm. The resolution of our lensless imaging technique is about 55 nm near Fe L₃₋edge and 78 nm near C K-edge.
Why does Brazil’s banking sector need public banks? What should BNDES do?
Creators: name: Rezende, Felipe
Publisher: name: PSL Quarterly Review
Year: 2015
Subjects: subject: bond market, financial market, public banks, national development bank, security markets, stabilization
subject: E00, E4, E6, G00, G1

description: One of the essential functions of the financial system is to provide the long-term funding needed for long-lived and expensive capital assets. However, one of the main difficulties of the current private financial system is its failure to provide such long-term financing. The paper specifically considers the short-termism in Brazil’s financial market as a major obstacle to financing long-term assets. There has been much discussion about how to support private long-term finance in order to meet Brazil’s growing infrastructure and investment needs. In its current form, the National Economic and Social Development Bank (BNDES) is the main source of long-term funding in the country. However, BNDES has been subject to a range of criticisms, such as crowding out private sector bank lending, and it is said to be hampering the development of the local capital market. The paper argues that, rather than following the traditional approach to justify the existence of public banks, based on market failures, finding an effective answer to this question requires a theory of financial instability. JEL Classifications: E00, E4, E6, G00, G1
description: PSL Quarterly Review, V. 68, N. 274 (2015)
Asteroids' Size Distribution and Colors from HiTS
Creators: name: Peña, J.
name: Fuentes, C.
name: Förster, F.
name: Martínez-Palomera, J.
name: Cabrera-Vives, G.
name: Maureira, J. C.
name: Huijse, P.
name: Estévez, P. A.
name: Galbany, L.
name: González-Gaitán, S.
name: de Jaeger, Th.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the observations of solar system objects during the 2015 campaign of the High cadence Transient Survey (HiTS). We found 5740 bodies (mostly Main Belt asteroids), 1203 of which were detected in different nights and in $g'$ and $r'$. Objects were linked in the barycenter system and their orbital parameters were computed assuming Keplerian motion. We identified 6 near Earth objects, 1738 Main Belt asteroids and 4 Trans-Neptunian objects. We did not find a $g'-r'$ color-size correlation for $14
description: 17 pages, 18 figures
Ownership Structure and R&D: An Empirical Analysis of Italian listed companies
Creators: name: Rossi, Fabrizio
name: Cebula, Richard J.
Publisher: name: PSL Quarterly Review
Year: 2016
Subjects: subject: Ownership structure, corporate governance, R&D, agency theory
subject: G32, G34, O32

description: The objective of this study is to explore the relationship between research and development outlays (R&D) and firm ownership structure for the public corporations listed on the Italian stock exchange. There is literature on the impact of corporate governance on firms’ innovation, and specifically on the relation between ownership structures and innovation. However, related empirical research is still in its infancy, with most contributions focused on the USA. Using a sample of 369 firm-year observations over the period 2005-2013, we investigate the relationship between R&D outlays and ownership structure estimating both a the fixed-effects panel model and a dynamic panel data system-GMM model. We consider various indicators of corporate governance, such as ownership concentration, board ownership, and institutional investors. Our findings reveal a negative relationship between R&D outlays and ownership concentration. Furthermore, we find a positive relationship between R&D investments and institutional investors, and a positive relationship between R&D outlays on the one hand and both firm size and firm age on the other hand. Finally, we find a negative relationship between R&D outlays and the debt-to-capital ratio. JEL codes: G32; G34; O32
description: PSL Quarterly Review, V. 68, N. 275 (2015)