cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Analyse von bestehenden Massive Open Online Courses (MOOC)
Creators: name: Buk, Thomas
Publisher: name: TU Wien
Year: 2015
Subjects: subject: MOOC
subject: cMOOC
subject: xMOOC
subject: Plattformen
subject: Marktübersicht
subject: Kriterien
subject: Organisationsmodell
subject: MOOC
subject: cMOOC
subject: xMOOC
subject: plattforms
subject: market overview
subject: criteria
subject: organizational model

description: Das Angebot von Massive Open Online Courses (MOOC) nimmt seit deren Anfängen, in den Jahren 2007/2008, stetig zu und erfreuen sich einem steigenden Interesse bei Lehrenden als auch Lernenden. Die Möglichkeit tausende von Lernenden durch freien Kurszugang zu erreichen, als auch das gemeinsame vernetze Lernen durch das Web zu nutzen, macht MOOCs zur spannenden Alternative bestehenden Formen des Online-Lernens. Die vorliegende Arbeit soll dabei klären, welche technischen Ausprägungen, didaktischen Konzepte sowie organisatorische Maßnahmen bei der Realisierung von MOOCs zu beachten sind? Eine vertiefte Literatur Recherche zu organisatorischen Kriterien, fachdidaktischen Konzepten und technischen Ausprägungen von MOOCs, bildet dabei das grundlegende methodische Vorgehen, auf der die weitere Analyse der drei ausgewählten MOOC Plattformen, Coursera, edX und openHPI basiert. Das Ergebnis beinhaltet dabei eine aktuelle Marktübersicht von bestehenden MOOC Management Systemen, ein Klassifikationsschema der bekanntesten MOOC Typen sowie einen Kriterien Katalog welcher sich in technische Kriterien, fachdidaktische Konzepte sowie organisatorischen Kriterien unterteilt. Das abgeleitete Organisationsmodell, bietet dabei einen Überblick, hinsichtlich Planung, Ablauf, Beurteilung sowie Feedback und Support der Kursteilnehmer, für die Realisierung von MOOCs.
description: The global market for Massive Open Online Courses (MOOC) has expanded dramitically since their first introduction in 2007/2008, which lead to gaining interest of learners and teachers worldwide. The possibility to offer thousands of students free course access and taking advantage of the connected learing approach via the web allows MOOCs to be one of the most interesting models of online learning. This thesis should clarify which technical criterias, didactical concepts and organizational arrangements are needed during a MOOC implementation. A indepth literature research regarding organizational criterias, didactical concepts and technical criterias of MOOCs, builds the foundation of the methodical approach. This allows to analyse the selected MOOC plattforms Coursera, edX and openHPI. As a result, this thesis delivers an actual market overview of available MOOC management systems, a classification schema for the most commong MOOC types and a criteria catalog which is devided into technical criterias, didactical concepts and organizational criterias. The derived organizational model provides an overview regarding planning, course cycles, assessment, feedback and support of course participants during a MOOC impelementation.
Finding the strongest stable weightless column with a follower load and relocatable concentrated masses
Creators: name: Kirillov, Oleg N.
name: Overton, Michael L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Physics (physics.class-ph)
subject: Numerical Analysis (math.NA)
subject: Dynamical Systems (math.DS)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider the problem of optimal placement of concentrated masses along a massless elastic column that is clamped at one end and loaded by a nonconservative follower force at the free end. The goal is to find the largest possible interval such that the variation in the loading parameter within this interval preserves stability of the structure. The stability constraint is nonconvex and nonsmooth, making the optimization problem quite challenging. We give a detailed analytical treatment for the case of two masses, arguing that the optimal parameter configuration approaches the flutter and divergence boundaries of the stability region simultaneously. Furthermore, we conjecture that this property holds for any number of masses, which in turn suggests a simple formula for the maximal load interval for $n$ masses. This conjecture is strongly supported by extensive computational results, obtained using the recently developed open-source software package GRANSO (GRadient-based Algorithm for Non-Smooth Optimization) to maximize the load interval subject to an appropriate formulation of the nonsmooth stability constraint. We hope that our work will provide a foundation for new approaches to classical long-standing problems of stability optimization for nonconservative elastic systems arising in civil and mechanical engineering.
Una revisione della stima della crescita economica italiana, 1861-1989
Creators: name: MADDISON, A.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Italy, Growth, GDP estimates
subject: N13

description: A major problem with the existing estimates of Italian GDP estimates for the nineteenth century is that they show virtually no advance in per capita GDP for the three decades before 1890, when all other Western European countries were experiencing significant growth. These estimates have troubled historians trying to interpret Italian economic development as well as analysts of comparative economic performance. The present work examines the problems related to official estimates of Italian GDP and puts forward revised estimates. JEL Codes: N13
description: Moneta e Credito, V. 44, N. 174 (1991)
Additional file 2 of The mitogenome of Triatoma brasiliensis brasiliensis (Hemiptera: Reduviidae), the main Chagas disease vector in the semi-arid region of northeastern Brazil
Creators: name: Almeida, Carlos E.
name: Du, Lifeng
name: Wang, Jingwen
name: Pires-Silva, Dayane
name: Folly-Ramos, Elaine
name: Harry, Myrian
name: Galvão, Cleber
Publisher: name: figshare
Year: 2025
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Supplementary Material 2. Complete annotated mitochondrial genome of Triatoma brasiliensis brasiliensis (GenBank Accession: PV085522).
Light neutrino and heavy particle exchange in $\nbb$-decay
Creators: name: Prézeau, Gary
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A simple and precise method is presented to compare contributions to neutrinoless double-beta decay ($\nbb$-decay) from heavy particle exchange and light Majorana neutrino exchange. This procedure makes no assumptions about the momentum transfer between the two nucleons involved in the $\nbb$-decay process. It is shown that for a general particle physics model, the characteristic $\nbb$-decay scale $> 4.4$ TeV when all the coupling constants are assumed to be natural and of ${\cal{O}}(1)$.
description: 4 pages
Disinflazione e re-inflazione in Italia: le implicazioni per la transizione all'unità monetaria
Creators: name: DE NARDIS, S.
name: MICOSSI, S.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Italy, Inflation, Monetary union
subject: E32, E42, F15

description: This paper presents a detailed discussion of inflation in Italy during the 1980s. The early 1980s witnessed disinflation but in the second-half inflation has re-emerged. The paper is relevant to the EMS debate, between the ‘monetarists’ (advocating immediate and irreversible fixity of exchange rates) and the ‘economists’ (warning of systemic rigidities and urging caution). The evidence is mixed: the EMS seems to have been accompanied by a convergence of inflation, but at a cost of stubborn unemployment suggesting that the policy has not been cost-free. Italian data is reviewed in the context of this discussion. JEL Codes: E32, E42, F15
description: Moneta e Credito, V. 44, N. 174 (1991)
Anisotropic three-dimensional weak localization in ultrananocrystalline diamond films with nitrogen inclusions
Creators: name: van Beveren, L. H. Willems
name: Creedon, D. L.
name: Eikenberg, N.
name: Ganesan, K.
name: Johnson, B. C.
name: Chimowa, G.
name: Churochkin, D.
name: Bhattacharyya, S.
name: Prawer, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a study of the structural and electronic properties of ultra-nanocrystalline diamond films that were modified by adding nitrogen to the gas mixture during chemical vapour deposition growth. Hall bar devices were fabricated from the resulting films to investigate their electrical conduction as a function of both temperature and magnetic field. Through low-temperature magnetoresistance measurements, we present strong evidence that the dominant conduction mechanism in these films can be explained by a combination of 3D weak localization (3DWL) and thermally activated hopping at higher temperatures. An anisotropic 3DWL model is then applied to extract the phase-coherence time as function of temperature, which shows evidence of a power law dependence in good agreement with theory.
description: 13 pages, 10 figures
AQUAPONICS: THE INTEGRATION OF FISH AND VEGETABLE CULTURE IN RECIRCULATING SYSTEMS
Creators: name: Rakocy, James E.
name: Rakocy, James E.
Publisher: name: Unknown
Year: 1994
Subjects: Agribusiness
Farm Management
Research and Development/Tech Change/Emerging Technologies

description: A commercial-scale, aquaponic system for the intensive production of tilapia and hydroponic vegetables has been developed at the Virgin Islands Agricultural Experiment Station. The system is well suited for Caribbean islands and other tropical regions where fresh water is scarce or level farm land is limited. It consists of a fish rearing tank, a clarifier, two hydroponic tanks and a reservoir, and is reliable, productive and easy to operate. Water continuously circulates between the fish and hydroponic components. The fish grow rapidly on a pelleted diet that is high in protein. Waste from the fish provides most of the nutrients required by vegetables. The vegetables recover these nutrients as a valuable by-product and purify the water. The presence of both fish and plants creates a very stable growing environment, while high nutrient levels and unlimited water promote rapid vegetable growth. This system is economical because nutrient costs are reduced, the need for expensive filtration devices is eliminated, component operating and infrastructural costs are shared, land requirements are small, water is conserved, and environmental impacts are minimized.
THE USE OF WITHAM COLLECTORS TO INCREASE PRODUCTION IN LOBSTER (PANULIRUS ARGUS) MARICULTURE
Creators: name: Quinn, Norman J.
name: Kojis, Barbara L.
name: Quinn, Norman J.
name: Kojis, Barbara L.
Publisher: name: Unknown
Year: 1994
Subjects: Environmental Economics and Policy
Research and Development/Tech Change/Emerging Technologies
Resource /Energy Economics and Policy

description: The western Atlantic spiny lobster (Panulirus argus) is the largest and the most widely distributed Caribbean lobster. Because of the high consumer demand and high price consumer's are willing to pay for lobster, scientists are exploring ways to raise lobsters in captivity. One approach to producing lobsters is full scale mariculture where lobsters are raised throughout their entire life cycle in captivity. Although researchers have successfully mated and spawned spiny lobsters in captivity, they have found it difficult to rear the larvae because of their long and complex larval life. Another approach is to collect the first lobster settlement stage, the puerulus, from the wild. The transparent pueruli settle in shallow water natural habitats such as mangroves and on artificial habitats, called Witham collectors. In the U.S. Virgin Islands pueruli settlement occurs all year round with seasonal settlement peaks. The collection of pueruli is a cheapcr, easier, and faster technique to establish a lobster mariculture operation than developing and maintaining a breeding stock and raising larvae to settlement stage. Interest in lobster mariculture is likely to continue to increase as the human population increases and as diet-conscious people increase their sea food consumption. Maximum sustainable yields for lobster fishing in many islands have already been exceeded and more effort is being spent on techniques to make lobster mariculture profitable.
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 3 (190)]
Creators: name: Cacciacomes De Somma
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1285
Subjects: subject: Bischofsurkunde
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Cacciacomes de Somma, Bischof von Cremona, genehmigt dem Magister Belebonus, Canonicus, Frater, Procurator und Syndicus der Kirche St. Cataldi [in Cremona], dass er Nicholaus und Johannesbonus de Surdis Land in Polesine Parmense verkauft.
The Omega- and the strange quark mass
Creators: name: Toussaint, Doug
name: Davies, C. T. H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Omega- correlators have been calculated on the MILC collaboration's archive of three flavor improved staggered quark lattices. The Omega- is stable under strong interactions (140 MeV below threshold). It provides a valuable consistency check on a combination of strange quark mass and lattice scale determination from other quantities. Alternatively, the Omega- mass could be used to fix the strange quark mass, which gives a check on computations of the strange quark mass based on the kaon mass.
description: Three pages, proceedings of the Lattice-04 symposium. (Corrected typographical errors)
Topological energy barrier for skyrmion lattice formation in MnSi
Creators: name: Leishman, A. W. D.
name: Menezes, R. M.
name: Longbons, G.
name: Bauer, E. D.
name: Janoschek, M.
name: Honecker, D.
name: DeBeer-Schmitt, L.
name: White, J. S.
name: Sokolova, A.
name: Milosevic, M. V.
name: Eskildsen, M. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the direct measurement of the topological skyrmion energy barrier through a hysteresis of the skyrmion lattice in the chiral magnet MnSi. Measurements were made using small-angle neutron scattering with a custom-built resistive coil to allow for high-precision minor hysteresis loops. The experimental data was analyzed using an adapted Preisach model to quantify the energy barrier for skyrmion formation and corroborated by the minimum-energy path analysis based on atomistic spin simulations. We reveal that the skyrmion lattice in MnSi forms from the conical phase progressively in small domains, each of which consisting of hundreds of skyrmions, and with an activation barrier of several eV.
description: Final accepted version
title: Students’ Perceptions And Experiences Of Anxiety In An Online Collaborative Project
Creators: name: Hilliard, Jake
Publisher: name: The Open University
Year: 2017

description: This study explored students’ perceptions and experiences of anxiety in an online collaborative project. Using a mixed methods approach, data derived from an online survey of students from the UK Open University (n=76) followed by purposefully sampled semi-structured interviews among survey respondents who agreed to be interviewed (n=11). The results revealed that: a) anxiety was a commonly experienced emotion among survey respondents, with many perceiving these feelings to be greater before or at the start of the collaborative project and then gradually decreasing throughout; b) anxiety derived from various sources which were all related to ‘uncertainty’; c) different learners perceived anxiety to have facilitative, debilitative, and neutral impacts on their participation and performance in the collaborative activity; d) learners used a range of coping strategies in order to manage anxiety, with problem-focused coping being more frequently reported than either emotion-focused coping or avoidance coping strategies; and e) getting to ‘know’ participants before the start of the collaborative project and being able to express and share feelings and emotions were seen as important for supporting anxious learners. Recommendations, aimed at reducing feelings of anxiety and improving learner experience in online collaborative projects, are discussed and future research in this field is suggested.
Un'unione dei pagamenti per l'Europa centrale: i problemi cruciali
Creators: name: VAN BRABANT, J.M.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Post-Soviet transition, Payments union
subject: P20, F33

description: The paper analyses the pros and cons of assisting Eastern European countries with some payment facility in their transition to market system over the next few years. The rationale underlying scheme, as well as the varied criticism such proposals have elicited are provided. The author presents the arguments for coming to grips with the prevailing and emerging external-payment constraints of the reforming countries, the original proposal for a payments facility, and some concrete data on what precisely will be involved in terms of capital commitments, credit facilities and behavioural constraints under international surveillance. JEL Codes: P20, F33
description: Moneta e Credito, V. 44, N. 174 (1991)
THE DEVELOPMENT OF PEST RESISTANT TRANSGENIC PLANTS
Creators: name: Headings, M.E.
name: Headings, M.E.
Publisher: name: Unknown
Year: 1994
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: The status of the development of pest-resistant transgenic plants was reviewed with primary focus on insect resistance. Such plants are genetically altered by recombinant DNA to exhibit resistance to one or more pest species. Bacterial plasmids such as found in Agrobacterium tumefaciens have proven to be effective vectors for introducing desired genes into DNA of selected host plant species. Genes have been success-fully transferred by both protoplast and intact cell wall transformation. Transfer techniques include: (1) Agrobacterium tumefaciens - mediated transfer of genes, (2) micro-injection of genes into cell nuclei, (3) protoplast-dependent direct transfer of genes, and (4) particle gun techniques (biolistics) whereby tungsten or gold particles coated with DNA are propelled under high velocity into intact plant cells. The gene for insect control in Bacillus thuringiensis has been isolated and success-fully inserted into the DNA of plant cells of cotton and potatoes for control of certain Lepidopteran and Coleopteran insects. Similar investigations are being conducted on other plants including tomato, maize, and tobacco. Two concerns regarding development of insect-resistant transgenic plants are the potential for insects to develop resistance and the receptivity of the general public to use such plants for human consumption.
Data-driven reduced-order models via regularized operator inference for a single-injector combustion process
Creators: name: McQuarrie, Shane A.
name: Huang, Cheng
name: Willcox, Karen E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences
subject: J.2

description: This paper derives predictive reduced-order models for rocket engine combustion dynamics via Operator Inference, a scientific machine learning approach that blends data-driven learning with physics-based modeling. The non-intrusive nature of the approach enables variable transformations that expose system structure. The specific contribution of this paper is to advance the formulation robustness and algorithmic scalability of the Operator Inference approach. Regularization is introduced to the formulation to avoid over-fitting. The task of determining an optimal regularization is posed as an optimization problem that balances training error and stability of long-time integration dynamics. A scalable algorithm and open-source implementation are presented, then demonstrated for a single-injector rocket combustion example. This example exhibits rich dynamics that are difficult to capture with state-of-the-art reduced models. With appropriate regularization and an informed selection of learning variables, the reduced-order models exhibit high accuracy in re-predicting the training regime and acceptable accuracy in predicting future dynamics, while achieving close to a million times speedup in computational cost. When compared to a state-of-the-art model reduction method, the Operator Inference models provide the same or better accuracy at approximately one thousandth of the computational cost.
description: To appear in the Journal of the Royal Society of New Zealand. See https://github.com/Willcox-Research-Group/ROM-OpInf-Combustion-2D for code and additional results
Geochronology, pyrite trace elements, and in-situ S isotopes of the giant Nagengkangqie’er silver deposit in the Eastern Kunlun Orogenic Belt, Northern Tibetan Plateau
Creators: name: Zhang, Xin-Ming
name: Li, Yan-Jun
name: Zhang, Sheng-Tao
name: Li, Wei-Wei
name: Xu, Chong-Wen
name: Kamradt, Andreas
name: Borg, Gregor
name: Wei, Jun-Hao
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: 555

description: The Nagengkangqie'er (Nageng) silver deposit, situated in the Eastern Kunlun Orogenic Belt (EKOB), Northwestern China. It contains 5,070 tons of contained silver at a silver grade of 325 g/t. Nonetheless, the genesis of the Nageng silver deposit is still under debate, due to the absence of definitive constraints the mineralization age and the metal sources. The U-Pb data analysis of a post-ore calcite vein established the minimum age of the mineralization at 207 ± 3 Ma, whereas the maximum age of 217 ± 4 Ma was determined from zircon U-Pb data obtained from the altered and mineralized rhyolitic porphyry host-rock. These temporal limitations suggest that the mineralization formed at ca. 217–207 Ma, and it is associated with the post-collisional setting of the Paleo-Tethys evolution in the EKOB. The distinct textural patterns, as revealed by petrographic observations, suggest three types of pyrites: py1 is composed of euhedral pyrite in the early barren quartz vein at stage 1, py2 is represented by subhedral-anhedral grains in massive ore veins at stage 2, and py3 forms euhedral crystals of varying sizes, which are interspersed with early-formed marcasite in the quartz + calcite + silver-bearing sulfosalt-dominated veins at stage 3. In-situ δ34S values of pyrites range between −2.33 ‰ and −0.37 ‰, indicating a dominantly magmatic origin. EPMA studies have revealed that silver in the Nageng deposit predominantly occurs as silver-bearing galena at stage 2, whereas silver is enriched in sulfosalts of stage 3. From py1 to py3, a decrease in the Co-content indicates a decrease in the ore-forming fluid temperatures. The presence of stage 3 sulfide, sliver-bearing sulfosalt, and calcite-quartz in a fracture-filled vein indicates low-pressure conditions during its formation, compared to stages 1 and 2. In summary, the Nageng deposit is a typical magmatic-hydrothermal vein-type Ag-Pb-Zn deposit. Fluid cooling and decrease in pressure, coupled with decreases in fO2 and fS2, are the parameters inferred to have led to a decrease of silver solubility in the hydrothermal fluids and, successively, promoted extensive Ag deposition.
CO in the Bipolar-Radio-Continuum Galaxy NGC 3367
Creators: name: Garcia-Barreto, J. Antonio
name: Scoville, Nick. Z.
name: Koda, Jin
name: Sheth, Kartik
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: CO emission has been imaged at 2" resolution in the central 10 kpc of the barred spiral galaxy NGC 3367. This galaxy has bipolar synchrotron lobes out to a radii of 6 kpc, straddling the compact nucleus. The peak molecular emission is in a source of radius 2" (425 pc) centered on the galaxy nucleus. The molecular mass is about 3 times 10**8 Msun in this peak an about 5.9 times 10**8 Msun within a radius of 4".5 (950 pc). The very large gas masses in the central source imply extinctions sufficiently high to completely obscure optical emission lines (e.g.BLR) associated with the nuclear radio source. The observed Balmer lines probably originate in the narrow line region few hundred pc from the nucleus. The CO emission in the central region is elongated NE-SW, very similar to the PA of the large scale synchrotron lobes. This elongation is likely due to non-axisymmetric gravitational potential of the stellar bar. We infer that the NE radio continuum lobe is on the far side of the galaxy and the SW lobe is on the near side. The central mass of molecular gas is sufficient mass to power the AGN accretion luminosity for over 10**8 yrs at 3 Msun per yr.
description: Accepted for publication in the Astronomical Journal (January 2005); 28 pages 11 figures
R.F. Kahn: un tributo
Creators: name: HARCOURT, G.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Obituary, Richard Ferdinand Kahn, Recollections
subject: B31

description: The article is a tribute to Richard Ferdinand Kahn, a member of the Faculty of Economics and Politics at Cambridge, who died on 6 June 1989. The author draws freely upon Kahn’s own writings as well as those of many other authors to recount his life and academic career. JEL Codes: B31
description: Moneta e Credito, V. 44, N. 174 (1991)
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 3 (192)]
Creators: name: Dalfinus De Pinzonibus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1286
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Dalfinus de Pinzonibus verkauft mit Erlaubnis des Ottobellus, Praepositus der Kirche St. Cataldi [in Cremona], Antoniolus de Blancha und Mazia de Beruffis ein Stück Land bei [der Kirche] St. Nicolai ad Murbassium.
DEVELOPMENT OF PANICUM SP. HYBRIDS USING APOMICTIC PLANTS
Creators: name: A. Sotomayor-Ríos, A.
name: Quiles-Belén, A.
name: Rivera-Amador, E.
name: Johnson, E.
name: A. Sotomayor-Ríos, A.
name: Quiles-Belén, A.
name: Rivera-Amador, E.
name: Johnson, E.
Publisher: name: Unknown
Year: 1994
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Guineagrass (Panicum maximum Jacq.) is an excellent forage grass. One of its major weaknesses is its seed shattering and low seed yield. Efforts to increase seed retention in guinea-grass have been unsuccessful due to the lack of genetic material having this characteristic and also to the difficulty encountered in the hybridization process. The reproduction of guineagrass is based on aposporous apomixis with pseudogamy. For the development of Panicum hybrids, we utilized facultative apomictics and two germplasm sources previously discovered. A possible hybrid was obtained using facultative apomictics PI 277901 and CIAT 673. Utilizing RAPD analyses, the following hybrids (2n=32) were verified: SPM-92 x PRPI 3622 and Tift-49 x PRPI 3622. Natural and hand-made crosses of paragrass (P. purpurascens Raddi) x klein-grass (P. coloratum L.) (2n=36) were also verified utilizing RAPD analyses. This study reports for the first time the existence of new Panicum hybrids including an interspecific hybrid of para x klein grass and the utilization of RAPD's as an excellent tool for the verification of the existence of hybrids in the Panicums.
Dalla teoria alla politica: l'economia come professione
Creators: name: CAIRNCROSS, A.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Alec Cairncross, theory, policy, reflections
subject: B31

description: The paper is a contribution to a series of recollections and reflections on the professional experiences of distinguished economists which the Banca Nazionale del Lavoro Quarterly Review started in 1979. Alec Cairncross recalls how he came to study economics by accident and his subsequent career in the field. JEL Codes: B31
description: Moneta e Credito, V. 45, N. 177 (1992)
A QUALITATIVE META-SYNTHESIS STUDY OF THE STRENGTHS AND WEAKNESSES OF THE UNITED NATIONS’ PEACEKEEPING MISSIONS IN AFRICA FROM 1945 TO 2018
Creators: name: Nguessan Yobouet
Publisher: name: figshare
Year: 2020
Subjects: subject: 160699 Political Science not elsewhere classified
subject: FOS: Political science

description: This study was intended to research the strengths and weaknesses of the UN peacemaking missions in Africa from1945 to 2018. The research utilized a qualitative meta-synthesis method (Sandelowski & Barroso, 2006). The study employed a descriptive technique for synthesizing findings from previous literature (Sekaran & Bougie, 2003; Paterson, Thorne, Canam & Jillings, 2001). The investigation was of causal type because it seeks to understand the reasons why some African people would behave differently by rejecting the UN (Wright, 2018). The selection and analysis of the existing literature took place in a contrived setting. Eight African countries that have received a UN peacekeeping mission in the past represented the unit of analysis in this study. The time horizon was of a cross-sectional type, where data was gathered over a period of weeks. The data collection process for this qualitative meta-synthesis study followed the guidelines of Sandelowski and Barroso's (2003, 2006). The research used a randomized selection procedure to choose from a set of literature (Erwin, Brotherson & Summers (2011). The data was collected from inter-related qualitative literature completed on the UN peacekeeping mission in Africa. While most people would not tolerate mistakes involving peacekeeping matters, the findings in this study have demonstrated that the UN has not underperformed regarding its commitment to provide international peace. The findings also revealed that people who have expressed hatred against the UN by attacking its staff and facilities are those who have experienced unsuccessful UN peacekeeping missions.
Complexity and information geometry in spin chains
Creators: name: Jaiswal, Nitesh
name: Gautam, Mamta
name: Sarkar, Tapobrata
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study Nielsen complexity and Fubini-Study complexity for a class of exactly solvable one dimensional spin systems. Our examples include the transverse XY spin chain and its natural extensions, the quantum compass model with and without an external magnetic field. We obtain the scaling behaviour of both complexities near quantum phase transitions in the thermodynamic limit, as a function of the system parameters. We provide analytical proofs of these, in an information geometric framework, which verify our numerical analysis. The scaling of the Nielsen complexity with the system size is also established, close to criticality. We also obtain analytic expressions for the Fubini-Study complexity in some special cases for all the models, while a numerical analysis in more generic situations is carried out. Our study clearly demonstrates the differences in the two notions of complexity in quasi-free fermionic systems.
description: Scaling analysis of the complexity is added. Generic geodesic analysis added. Major additions and revisions
IMPROVEMENTS IN THE QUALITY OF MICROPROPAGATED ANTHURIUM ANDREANUM L. PLANTLETS BY THE USE OF BILAYER CULTURE TECHNIQUES: PRELIMINARY RESULTS
Creators: name: Bateson, J.M.
name: Bateson, J.M.
Publisher: name: Unknown
Year: 1994
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Anthurium andreanum is becoming increasingly important in the Caribbean, playing a part in the agricultural diversification programs of many governments. Planting material is generally mass produced via micropropagalion, during which Anthurium morphogenic callus is usually transferred to solid multiplication medium for shoot regeneration. The regeneration rate and the shoot quality, however, can sometimes be very poor, necessitating a prolonged culture period to produce plantlets of sufficient size and quality for weaning. The use of liquid media is known to enhance shoot regeneration in some species, but it also requires costly equipment in the form of rotary or oscillating shakers, and can induce shoot hvperhydricity (vitrification). An intermediate media form requiring no additional equipment, namely the bilayer, has many of the advantages of liquid culture with less of a tendency to induce hyperhydricity. The use of bilayer culture media was shown to stimulate and prolong Anthurium shoot production. Plantlets produced in this way were larger, with a greater number of leaves. The leaves, also, had a greater surface area and they appeared to be much darker green than those of the control. Further experiments indicate that these plantlets are hardier, surviving the weaning process well and quickly initiating new growth. The simple use of bilayer techniques can, therefore, be used to improve the quality of micropropagated Anthurium plantlets, while reducing the production time. This improved micropropagation efficiency better enables planting material produced in the Caribbean to compete with imports.
Costly Information and Estimating Existence Values
Creators: name: Rondeau, Daniel
name: Rollins, Kimberly S.
name: Martin, Patrick
name: Rondeau, Daniel
name: Rollins, Kimberly S.
name: Martin, Patrick
Publisher: name: Unknown
Year: 1993
Subjects: Agricultural and Food Policy
Research and Development/Tech Change/Emerging Technologies

description: Th􀀁e theoretical and empirical implications of information effects on estimates of existence values (EV) are analyzed using a Household Production model. If households operate in perfect infonnation markets, current practices of providing "policy relevant" or "complete" infonnation to respondents to· Contingent Valuation (CV) surveys may produce larger benefit estimates than should be used in damage assessment and benefit-cost analysis. However, the probable failure of infonnation markets provides a ratiqnale for the provision of infonnation. An empirically applicable rule is derived that detennines the optimal level of infonnation use when estimating existence values. Adopting this methodology would provide an improved decision rule, reinforce the validity and credibility of CVM results, and prom(?te the acceptance of EV and other nonuse values as a desirable componenfof benefit-cost analysis.
Driven quadrature and spin squeezing in a cavity-coupled ensemble of two-level states
Creators: name: El-Ella, Haitham A. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The generated magnitude of quadrature squeezing in a cavity-coupled ensemble, which is continuously driven using a coherent off-axis field, is theoretically explored. Using a truncated set of equations-of-motion derived from a Dicke Hamiltonian, steady-state quadrature squeezing of the cavity field is numerically calculated to approach a limit of -3 dB, while frequency-modulated quadrature squeezing approaches a limit of -14 dB, in the absence of pure-dephasing, and as a function of the ensemble's size and detuning. The impact of pure-dephasing on steady-state quadrature squeezing is shown to be mitigated by increased detuning of the driving field, while frequency-modulated squeezing is only shielded in a regime where the cumulative coupling and driving rates are in excess of the pure-dephasing rate. Spin-squeezed entanglement is also calculated to occur simultaneously with weakly-driven frequency-modulated quadrature squeezing.
description: 13 pages, 11 figures
MICROPROPAGATION AND FIELD PERFORMANCE OF VIRUS-FREE WHITE COCOYAM (XANTHOSOMA SAGITTIFOLIUM L. Schott) IN COSTA RICA
Creators: name: Torres, S.
name: Gómez, L.
name: Valverde, R.
name: Arias, O.
name: Thorpe, T.
name: Torres, S.
name: Gómez, L.
name: Valverde, R.
name: Arias, O.
name: Thorpe, T.
Publisher: name: Unknown
Year: 1994
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Apical meristem (dome with one or two leaf primordia) explants of a local virus infected white cocoyam were culture on modified Murashige and Skoog (MS) medium containing 0.1 mg. L ' 6- Bcnzylaminpurine (BA). After 120 days, complete plants were developed and above 90% of them were Dasheen Mosaic Virus (DMV) free according to ELI SA test. To induce axillary shoot formation, corm section of in vitro plants were culture on modified MS medium supplemented with 3 mg L'16- BAP. An average of 4 shoots were formed every 42 days. Shoots produced in vitro were rooted on MS without growth regulators with 100% success and after 42 days, complete plants were obtained. About 98% of the rooted in vitro plants survived transfer to the greenhouse and were successfully transplanted outdoors. Field ev aluation of two generations of in vitro virus-free white cocoyams was done. The results indicated that virus-free white cocoyams had twice the yield and better cormel quality than virus-infected plants. The establishment of a certification 'seed' program for white cocoyam is discussed.
Un approccio di equilibrio finanziario di lungo periodo ai problemi di un sistema pensionistico a ripartizione
Creators: name: NICCOLI, A.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: H55

description: The article compares the distributional features of pay-as-you-go and fully funded pension systems. It analyses in particular the tendencies of pay-as-you-go systems to offer vary high benefits and internal rate of returns at the beginning of their establishment, while being subject to increasingly painful cuts in benefits over time. The author concludes that a mixed system exhibiting features of both pay-as-you-go and fully funded pension systems may be the optimal one. JEL Codes: H55
description: Moneta e Credito, V. 45, N. 177 (1992)
One-particle density matrix of a trapped Lieb-Liniger anyonic gas
Creators: name: Scopa, Stefano
name: Piroli, Lorenzo
name: Calabrese, Pasquale
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We provide a thorough characterisation of the zero-temperature one-particle density matrix of trapped interacting anyonic gases in one dimension, exploiting recent advances in the field theory description of spatially inhomogeneous quantum systems. We first revisit homogeneous anyonic gases with point-wise interactions. In the harmonic Luttinger liquid expansion of the one-particle density matrix for finite interaction strength, the non-universal field amplitudes were not yet known. We extract them from the Bethe Ansatz formula for the field form factors, providing an exact asymptotic expansion of this correlation function, thus extending the available results in the Tonks-Girardeau limit. Next, we analyse trapped gases with non-trivial density profiles. By applying recent analytic and numerical techniques for inhomogeneous Luttinger liquids,we provide exact expansions for the one-particle density matrix. We present our results for different confining potentials, highlighting the main differences with respect to bosonic gases.
description: 33 pages, 14 figures. v2: minor changes
CPT and Other Symmetries in String/M Theory
Creators: name: Dine, Michael
name: Graesser, Michael
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We initiate a search for non-perturbative consistency conditions in M theory. Some non-perturbative conditions are already known in Type I theories; we review these and search for others. We focus principally on possible anomalies in discrete symmetries. It is generally believed that discrete symmetries in string theories are gauge symmetries, so anomalies would provide evidence for inconsistencies. Using the orbifold cosmic string construction, we give some evidence that the symmetries we study are gauged. We then search for anomalies in discrete symmetries in a variety of models, both with and without supersymmetry. In symmetric orbifold models we extend previous searches, and show in a variety of examples that all anomalies may be canceled by a Green-Schwarz mechanism. We explore some asymmetric orbifold constructions and again find that all anomalies may be canceled this way. Then we turn to Type IIB orientifold models where it is known that even perturbative anomalies are non-universal. In the examples we study, by combining geometric discrete symmetries with continuous gauge symmetries, one may define non-anomalous discrete symmetries already in perturbation theory; in other cases, the anomalies are universal. Finally, we turn to the question of CPT conservation in string/M theory. It is well known that CPT is conserved in all string perturbation expansions; here in a number of examples for which a non-perturbative formulation is available we provide evidence that it is conserved exactly.
description: 52 pages.1 paragraph added in introduction to clarify assumptions
SCREENING SWEET POTATO GERMPLASM FOR HIGH DRY MATTER
Creators: name: David, P.P.
name: Bonsi, C.K.
name: Clarke, O.C.
name: Douglas, D.
name: David, P.P.
name: Bonsi, C.K.
name: Clarke, O.C.
name: Douglas, D.
Publisher: name: Unknown
Year: 1994
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Sweet potato is an extremely valuable crop for people in tropical regions. It is a high energy food source and unlike many other root crops, is an excellent source of vitamins and minerals. Sweet potato is one of eight crops identified by National Aeronautics and Space Administration (NASA) for bioregenerative studies. One of the objectives of the sweet potato breeding program at Tuskegee University is the selection of high yielding cultivars with high dry matter content. Such cultivars can be made available to the Caribbean region as an alternate high energy crop requiring minimal inputs. To identify such cultivars, field screening of over 300 breeding lines were evaluated over a two year period. Selections made from these trials were further evaluated for their adaptability in the Tuskegee University-NFT system. A dry matter content of 25% or more was the major criterion used for selection. Initial planting sources were seeds derived from ten accessions. After the initial screening ten lines were evaluated in replicated trials in the first year. These lines were placed in advanced replicated trials in the second year for further evaluations. Results of the first year data showed dry matter content ranged from 28.8 - 40.9%, with yields ranging from 8.4-37.2 Mt/ha. In the second year, yields were higher ranging from 13.87-58.06 Mt/ha. From these evaluations all lines except K-123.20, which showed very poor yields, were recommended for testing in the TUNFT system.
Sustainable forestry and woodlot licences in BC
Creators: name: Brown, Larianna
Publisher: name: University of British Columbia
Year: 2011

description: Currently the vast majority of Crown forestland in BC is managed by large private forest corporations who hold industrial tenures. Concerns over the long term ecological and social implications of forest management have generated increased support for small scale forestry such as woodlot licences: Woodlots are the smallest tenure available in the province, typically held by individuals, families, small corporations, and First Nations. While many practitioners, academics, and environmentalists assert that small landholder forest operations offer a comprehensive approach to forest management, there is a gap between the supposed benefits of small scale forestry and empirical conclusive evidence. The aim of this thesis is to fill this gap. Efforts made by woodlot licence holders to implement sustainable forest management are examined. In addition challenges experienced by licencees in their attempts at sustainable forestry initiatives are analyzed. All woodlot licence holders in the province were surveyed via a mail out questionnaire. 211 of the 813 licencees answered the survey. The according response rate of 25.9 % is considered acceptable to make inferences about woodlots across the province. Results indicate that the average woodlot operator undertakes a number of voluntary measures that often surpass provincial requirements intended to institute more ecologically sound and socially responsible forestry. The indicators of sustainable forest management woodlot operators fall short of meeting are recognizing and consulting First Nations regarding their rights to traditional lands and resources, and managing and marketing diverse forest products. Licence holders identified administrative and operating costs imposed by current provincial regulations, as the most significant barrier undermining voluntary sustainable forestry practices. A number of recommendations to address identified barriers were proposed by licencees. The most common proposal was the provincial adoption of cost saving incentive driven administrative requirements that reward operators applying sustainable measures of forest stewardship. The findings of this research suggest that if appropriate revisions are made to woodlot regulations, the expansion of the Woodlot Licence Program will encourage more sustainable forest management of Crown land throughout the province.
BIOMASS PRODUCTION AND NUTRITIVE VALUE OF LEUCAENA EDIBLE FORAGE OF DIFFERENT STEM DIAMETERS
Creators: name: Asiedu, F.H.
name: Fearon, A.L.
name: Asiedu, F.H.
name: Fearon, A.L.
Publisher: name: Unknown
Year: 1994
Subjects: Livestock Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Dry matter (DM) production, crude protein (CP) content, in vitro digestibility (IVOMD). and an intake of DM, CP and metabolizable energy (ME) of leucaena forage with stem diameters up to 8, 12, 15 and >15 mm were evaluated to determine maximum twig size for inclusion in chopped leucaena for feeding goats. CP and IVOMD for 8 mm (177 and 490 g/kg DM, respectively) were about 15 per cent higher but forage DM yields (13.5 t/ha/yr) were 36 per cent lower than for the other stem sizes. Intake (per kg body weight) of DM, was similar across all stem diameters, but that of CP and ME for >15 mm (1.79 g and 70.8 kJ) was lower (P <0.05) than for 8 mm (2.40 g and 102.1 kJ). However, nutrient concentration and intake remained high up to 15 mm. It was concluded that chopping leucaena forage prior to feeding will permit the inclusion of twigs 15 mm in diameter (about twice the size of an ordinary pencil) without detracting from the nutrient intake of goats, while allowing for 20-40 per cent higher stocking rates.
Determinazione dei salari e contrattazione collettiva nell'industria italiana
Creators: name: DELL’ARINGA, C.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Collective bargaining, manufacturing, Italy, Unions
subject: L60

description: The article presents preliminary work on the role of unions and collective bargaining in the process of wage determination at firm level in Italy. The characteristics of the wage determination process and how it effects the composition of pay in Italian manufacturing is described. The methodology used to estimate the union/non-union differential and its application to the Italian case is provided. The data set and variables uses are described and regression estimates are presented. A particular focus is placed on the relevance of union density and firm size to the level and composition of pay for both manual and non-manual workers. JEL Codes: L60
description: Moneta e Credito, V. 45, N. 177 (1992)