cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
EVALUACION DE UNA POBLACION SELECCIONADA DE Phaseolus coccineus INOCCULADA CON LOS VIRUS CAUSANTES DEL MOSAICO DORADO DEL FRIJOL, MOSAICO COMUN DEL FRIJOL, Y MOSAICO DEL CAUPI EN PUERTO RICO
Creators: name: Zapata, Mildred
name: Freytag, George F.
name: Zapata, Mildred
name: Freytag, George F.
Publisher: name: Unknown
Year: 1983
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Las enfermedades virales constituyen uno de los problemas más graves en la producción del cultivo del frijol (Phaseolus vulgaris L.) en los trópicos. En América Latina los virus de mayor importancia son el mosaico dorado (BGMV), el mosaico común del frijol (BCMV), y con menos frecuencia, el mosaico común del caupí (CPMV). Los Proyectos Bean/Cowpea CRSP-Título XII de la Universidad de Puerto Rico tienen como uno de sus objetivos el desarrollar poblaciones de especies de Phaseolus con resistencias a enfermedades de importancia a vulgaris. Con el objetivo de determinar resistencia al BGMV, BCMV, (cepa necrótica) y CPMV en P. coccineus se seleccionaron 158 líneas de un segundo ciclo de selección recurrente. Se aumentó cada línea asexualmente por esquejes para tener replicaciones de cada línea en las tres inoculaciones virales. La inoculación del BGMV se realizó por injerto de ramas infectadas en plantas sanas, la del BCMV y el CPMV por frote de la suspensión viral sobre la hoja. La infección latente se determinó en el cv. La Vega para el BCMV y en el cv. l0R-65 para el CPMV.
The Chaplygin dark star
Creators: name: Bertolami, O.
name: Paramos, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the general properties of a spherically symmetric body described through the generalized Chaplygin equation of state. We conclude that such object, dubbed generalized Chaplygin dark star, should exist within the context of the generalized Chaplygin gas model of unification of dark energy and dark matter, and derive expressions for its size and expansion velocity. A criteria for the survival of the perturbations in the GCG background that give origin to the dark star are developed, and its main features are analyzed.
description: 7 pages, 1 figure, 1 table
THE NOCTUIDS (LEPIDOPTERA NOCTUIDAE) DANGEROUS TO FOOD AND INDUSTRIAL CROPS IN FRENCH GUIANA
LES NOCTUELLES (LEPIDOPTERA NOCTUIDAE) NUISIBLES AUX CULTURES INDUSTRIELLES ET VIVRIERES EN GUYANE FRANÇAISE
Creators: name: Silvain, J.F.
name: Thiberville, F.
name: Silvain, J.F.
name: Thiberville, F.
Publisher: name: Unknown
Year: 1983
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Une revue des principales productions agricoles guyanaises est faite en signalant les problèmes que posent les Lepidopteres noctuidae aux cultures dans cette region. Une liste des noctuelles nuisibles aux cultures industrielles et vivrieres en Guyane française, ou susceptibles de la devenir, est presentee. Cette liste inclue des references provenant d'autres pays de la zone neotropicale. Des donnees sont fournies sur la biologie des principales especes ainsi que sur les méthodes de lutte employees en Guyane française contre ces insectes. ----- Here is a review of the principal agricultural productions in French Guiana, pointing out the problems caused on the crops in this region by noctuid moths. We present a list of noctuids harmful, or capable of becoming harmful, to industrial and food crops in French Guiana. This list includes references arising from other countries in the neotropical zone. The data is furnished upon the biology of the main species, as well as on the methods employed to control these pests in French Guiana.
Creating and controlling global Greenberger-Horne-Zeilinger entanglement on quantum processors
Creators: name: Bao, Zehang
name: Xu, Shibo
name: Song, Zixuan
name: Wang, Ke
name: Xiang, Liang
name: Zhu, Zitian
name: Chen, Jiachen
name: Jin, Feitong
name: Zhu, Xuhao
name: Gao, Yu
name: Wu, Yaozu
name: Zhang, Chuanyu
name: Wang, Ning
name: Zou, Yiren
name: Tan, Ziqi
name: Zhang, Aosai
name: Cui, Zhengyi
name: Shen, Fanhao
name: Zhong, Jiarun
name: Li, Tingting
name: Deng, Jinfeng
name: Zhang, Xu
name: Dong, Hang
name: Zhang, Pengfei
name: Liu, Yang-Ren
name: Zhao, Liangtian
name: Hao, Jie
name: Li, Hekang
name: Wang, Zhen
name: Song, Chao
name: Guo, Qiujiang
name: Huang, Biao
name: Wang, H.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Greenberger-Horne-Zeilinger (GHZ) states, also known as two-component Schrödinger cats, play vital roles in the foundation of quantum physics and, more attractively, in future quantum technologies such as fault-tolerant quantum computation. Enlargement in size and coherent control of GHZ states are both crucial for harnessing entanglement in advanced computational tasks with practical advantages, which unfortunately pose tremendous challenges as GHZ states are vulnerable to noise. Here we propose a general strategy for creating, preserving, and manipulating large-scale GHZ entanglement, and demonstrate a series of experiments underlined by high-fidelity digital quantum circuits. For initialization, we employ a scalable protocol to create genuinely entangled GHZ states with up to 60 qubits, almost doubling the previous size record. For protection, we take a new perspective on discrete time crystals (DTCs), originally for exploring exotic nonequilibrium quantum matters, and embed a GHZ state into the eigenstates of a tailor-made cat scar DTC to extend its lifetime. For manipulation, we switch the DTC eigenstates with in-situ quantum gates to modify the effectiveness of the GHZ protection. Our findings establish a viable path towards coherent operations on large-scale entanglement, and further highlight superconducting processors as a promising platform to explore nonequilibrium quantum matters and emerging applications.
description: 7 pages, 4 figures + supplementary information
On positive maps, entanglement and quantization
Creators: name: Majewski, W. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 46L60; 46L55

description: We outline the scheme for quantization of classical Banach space results associated with some prototypes of dynamical maps and describe the quantization of correlations as well. A relation between these two areas is discussed.
Aplicaciones didácticas y profesionales de los sistemas hipertextuales para la traducción
Creators: name: Rojo, Jorge Lieva
name: Cerezo-Ceballos, Luis
name: Pastor, Gloria Corpas
Publisher: name: Trans
Year: 2023
Subjects: classificationCode: 47
subject: Language, communication and culture

description: Published in: Trans, no. 6, 2002.
Cosmological parameters and the WMAP data
Creators: name: Lewis, Antony
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I discuss whether the standard cosmological models fit the WMAP data well enough to justify parameter estimation with standard assumptions. The observed quadrupole is low (but has significant foreground uncertainty) and drives weak evidence for theoretical models predicting low values, such as models with a running spectral index. Other more seriously outlying points of the WMAP power spectrum appear not to fit the expectations of simple Gaussian models very well. The effective temperature chi-squared is however acceptable on large scales. There also appears to be evidence for an anisotropic distribution of power, which taken together with the other points may indicate that either there is a problem with the WMAP data or that standard cosmological models are incorrect. These issues should be clarified before cosmological parameter extraction for the usual standard models can be trusted, and hint that maybe the CMB is more interesting than we imagined. I also discuss various systematic and analysis issues, and comment on various oddities in the publicly available first year WMAP data and code.
description: Contribution to the Conference "Thinking, Observing and Mining the Universe" (Thinking2003) 22-27 Sep 2003, Sorrento, Italy. Additional material at http://cosmologist.info/Sorrento03
title: Spatiality and Teacher Workplace Cultures
Creators: name: McGregor, Jane Hazel
Publisher: name: The Open University
Year: 2004

description: Space makes a difference. Although much schooling is spatially constituted, its significance is largely unrecognised in educational research. In this thesis I explore how space is implicated in the construction of the school as a workplace for teachers and other adults. Empirical case studies of two secondary schools in England employed a variety of methods to explore the spatial orderings that both shaped activity and were produced by it, and the meaning that was made of this. The department proved to be a major location for interactions with colleagues. This demonstrated a need to move from monolithic notions of school culture or even teacher subcultures. Such configurations of teacher interactions were then explored through practice-based theorising in relation to new conceptions of situated learning, including communities of practice. In spatialising these interpretive strategies and integrating a Foucaultian approach to power relations, it became apparent that lateral modalities of power such as collaboration and negotiation are critical elements locating adult learning and work. The crucial importance of context in the associations of teachers is therefore articulated here through spatiality. This is congruent with moves in critical pedagogy to develop more emancipatory relationships through locating practice. The theoretical lenses afforded by spatiality, including those informed by actor-network theories. are used to focus on multi-layered and complex networks of social and technological relations. constellations of everyday materially-embedded practices extending in complex interrelations beyond what is variably perceived as 'the school'. Spatiality, as space-time. is enacted and constituted through the social; thus the form, location and content of interactions represent a particular nexus of dynamic power relations constituting 'the workplace'. In this formulation, schools as workplaces for adults are spaces continually made and remade.
Generalizations of Yang-Mills Theory with Nonlinear Constitutive Equations
Creators: name: Goldin, Gerald A.
name: Shtelen, Vladimir
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We generalize classical Yang-Mills theory by extending nonlinear constitutive equations for Maxwell fields to non-Abelian gauge groups. Such theories may or may not be Lagrangian. We obtain conditions on the constitutive equations specifying the Lagrangian case, of which recently-discussed non-Abelian Born-Infeld theories are particular examples. Some models in our class possess nontrivial Galilean (c goes to infinity) limits; we determine when such limits exist, and obtain them explicitly.
description: Submitted to the Proceedings of the 3rd Symposium on Quantum Theory and Symmetries (QTS3) 10-14 September 2003. Preprint 9 pages including references
Management of quality requirements in agile and rapid software development: A systematic mapping study
Creators: name: Behutiye, Woubshet
name: Karhapää, Pertti
name: Lopez, Lidia
name: Burgues, Xavier
name: Martinez-Fernandez, Silverio
name: Vollmer, Anna Maria
name: Rodriiguez, Pilar
name: Franch, Xavier
name: Oivo, Markku
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Context:Quality requirements (QRs) describe the desired quality of software, and they play an important role in the success of software projects. In agile software development (ASD), QRs are often ill-defined and not well addressed due to the focus on quickly delivering functionality. Rapid software development (RSD) approaches (e.g., continuous delivery and continuous deployment), which shorten delivery times, are more prone to neglect QRs. Despite the significance of QRs in both ASD and RSD, there is limited synthesized knowledge on their management in those approaches. Objective:This study aims to synthesize state-of-the-art knowledge about QR management in ASD and RSD, focusing on three aspects: bibliometric, strategies, and challenges. Research method:Using a systematic mapping study with a snowballing search strategy, we identified and structured the literature on QR management in ASD and RSD. Check the PDF file to see the full abstract and document.
description: 31 pages, the article is currently in press in Information and Software Technology journal and can be accessed through https://doi.org/10.1016/j.infsof.2019.106225
IDENTIFICATION OF QUALITY CHARACTERISTICS OF SWEET POTATO USED AS A STAPLE FOOD IN THE CARIBBEAN
Creators: name: Martin, Franklin W.
name: Martin, Franklin W.
Publisher: name: Unknown
Year: 1983
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: The potential of the sweet potato in the tropics is an everyday staple. A chief limitation to achieving this potential is lack of quality. The quality features of the sweet potato at the table are attractiveness, softness, mouthfeel,,fiber, and flavor. Quality in appearance is having a uniform color, and the absence of gray and greenish tints, and of cracks and erosion. Quality in mouthfeel is an intermediate sensation, neither too moist nor too dry and choking. Quality in flavor is complex. It involves lack of strong flavors, blandness, and a low amount of sweetness. Observations and experimental data are mustedered to demonstrate these characteristics.
Kinematics of the chromospherically active binaries and evidence of an orbital period decrease in binary evolution
Creators: name: Karatas, Y.
name: Bilir, S.
name: Eker, Z.
name: Demircan, O.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Kinematics of 237 Chromospherically Active Binaries (CAB) were studied. The sample is heterogeneous with different orbits and physically different components from F to M spectral type main sequence stars to G and K giants and super giants. The computed $U$, $V$, $W$ space velocities indicate the sample is also heterogeneous in the velocity space. That is, both kinematically younger and older systems exist among the non-evolved main sequence and the evolved binaries containing giants and sub giants. The kinematically young (0.95 Gyr) sub-sample (N=95), which is formed according to the kinematical criteria of moving groups, was compared to the rest (N=142) of the sample (3.86 Gyr) in order to investigate observational clues of the binary evolution. Comparing the orbital period histograms between the younger and older sub-samples, evidences were found supporting Demircan's (1999) finding that the CAB binaries lose mass (and angular momentum) and evolve towards shorter orbital periods. The evidence of mass loss is noticeable on the histograms of the total mass ($M_{h}+M_{c}$), which is compared between the younger (available only N=53 systems) and older sub-samples (available only N=66 systems). The orbital period decrease during binary evolution is found to be clearly indicated by the kinematical ages of 6.69, 5.19, and 3.02 Gyr which were found in the sub samples according to the period ranges of $logP\leq0.8$, $0.8
description: 26 pages, including 11 figures and 5 tables, 2004, MNRAS, 349, 1069
title: The Reader and the Book: Ideology and the Construction of Identity in Narrative Fiction
Creators: name: McCarthy, Nora
Publisher: name: The Open University
Year: 2004

description: The focus of my research is on the complex interaction between reader, ideology and text, in the context of response to narrative fiction by girls aged eleven to fourteen, in relation to both voluntary and curriculum based reading. I have explored response to narrative in three interwoven contexts: an individual case study based on response to a range of fictional texts; group response to voluntary reading and response in the context of the development of a critical literacy project, based on the class novel, against the background of culture and ideology in Northern Ireland. The questions which I address in my research relate to the nature of the process which creates literary meaning, the relationship between narrative, representation and subjectivity, the ways in which the reader's repertoire influences response and the complex interplay between the values of the reader and the ideology of the text. Central to my thesis is the dynamic role of the reader in realizing the potential of the text and, drawing on the insights of Harding (1967, 1977), I have conceptualized that role as encompassing both spectator and participant modes. All readers, I argue, bring to the text their own repertoires of personal experience, cultural knowledge, values and beliefs and these will have a considerable influence on the reader's response to the text. I examine the relationship between narrative, ideology and subjectivity arguing that narrative, because of its multi-vocal nature, opens up opportunities for resistant as well as consensual readings. I consider how the transaction between reader and text fits into the wider context of the relationship between literary and extra-literary discourse, drawing on a confluence of reader response, cultural theory and narratology. I explore the relationship between the construction of childhood and its representation in narrative fiction written for children, arguing that understandings of childhood are ideological, that changing ideas about childhood are reflected in children's literature and that there is a dialogical relationship between actual childhood and its imaginary construction in narrative fiction. The relationship between reader and text is, I argue, dialogical and ideological. I suggest that narrative is an evaluative context for subjectivity, presenting us with a repertoire of possible selves, which, in the process of negotiating our identities, we match to our own construction of selfhood.
Relativistic stars in 4D Einstein-Gauss-Bonnet gravity
Creators: name: Doneva, Daniela D.
name: Yazadjiev, Stoytcho S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the present paper we investigate the structure of relativistic stars in 4D Einstein-Gauss-Bonnet gravity. The mass-radius relations are obtained for realistic hadronic and for strange quark star equations of state, and for a wide range of the Gauss-Bonnet coupling parameter $α$. Even though the deviations from general relativity for nonzero values of $α$ can be large enough, they are still comparable with the variations due to different modern realistic equations of state if we restrict ourselves to moderate value of $α$. That is why the current observations of the neutron star masses and radii alone can not impose stringent constraints on the value of the parameter $α$. Nevertheless some rough constraints on $α$ can be put. The existence of stable stellar mass black holes imposes $\sqrtα\lesssim 2.6 {\rm km}$ for $α>0$ while the requirement that the maximum neutron star mass should be greater than two solar masses gives $\sqrt{|α|}\lesssim 3.9 {\rm km}$ for $α<0$. We also present an exact solution describing the structure of relativistic stars with uniform energy density in 4D Einstein-Gauss-Bonnet gravity.
description: 9 pages, 3 figures
Deconstructing the “I” and “SLA” in ISLA : One curricular approach
Creators: name: Cerezo-Ceballos, Luis
name: Leow, Ronald P.
Publisher: name: SSLLT Journal
Year: 2023
Subjects: classificationCode: 47
subject: Language, communication and culture

description: Article published in: Studies in Second Language Learning and Teaching, vol. 6, no. 1, March 2016
Determining the Co-Rotation Radii of Spiral Galaxies Using Spiral Arm Pitch Angle Measurements at Multiple Wavelengths
Creators: name: Abdeen, Shameer
name: Kennefick, Daniel
name: Kennefick, Julia
name: Miller, Ryan
name: Shields, Douglas W.
name: Monson, Erik B.
name: Davis, Benjamin L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The spiral arms spanning disk galaxies are believed to be created by density waves that propagate through galactic disks. We present a novel method of finding the co-rotation radius where the spiral arm pattern speed matches the velocities of the stars within the disk. Our method uses an image-overlay technique, which involves tracing the arms of spiral galaxies on images observed in different wavelengths. Density wave theory predicts that spiral arms observed from different wavelengths show a phase crossing at the co-rotation radius. For the purpose of this study, 20 nearby galaxies were analyzed in four different wavelengths with pitch angle measurements performed by two independent methods. We used optical wavelength images ($B$-band 440nm), two infrared wavelength images provided by Spitzer (3.6$μ$m and 8$μ$m) and ultraviolet images from GALEX (1350Å, 1750Å). The results were compared and verified with other records found in the literature. We then found rotation curve data for six of our galaxies and used our co-rotation radii estimates to measure the time that would elapse between star formation and moving to their observed positions in the $B$-band spirals. The average time lapse for this motion was found to be $\sim$ 50 Myr. The success of this new method of finding the co-rotation radius confirms density wave theory in a very direct way.
description: 9 pages, 10 figures, 4 tables
title: Investigating the use of audio materials to support mathematical learning: from curriculum access to reflective reciprocal learning
Creators: name: Simmons, Susan Florence
Publisher: name: The Open University
Year: 2005

description: I was motivated to undertake this research by concerns that arose from my professional and personal experiences in education. I was concerned that students with visual impairment were not being offered equality of access to the mathematics curriculum. Some schools cited high visual content as a reason for withdrawing students from mainstream classrooms. The study set out to pursue the thesis that students' experiences in mathematics education could be enhanced and extended through using audio recordings as complementary means of learning. It was carried out, in a variety of settings, with students of upper primary and secondary age. The value of applying a multi-method approach became evident over three years of fieldwork. I supplemented Soft Systems Methodology (Checkland and Scholes, 1990) with principles from other methodologies in response to feedback on use and production of audio materials. Students made invaluable, constructive contributions in their roles as co-researchers. An action-research approach evolved as most appropriate for the study. A complex interplay of factors was found to affect the extent to which audio recordings could be facilitative of inclusion. As well as analysing these factors and considering their wider implications, this account describes how my original formulation of the research in terms of issues of access became reconceived in terms of reflective, reciprocal learning. The study opened up sources of information that, seemingly, were being unexplored, under used, under valued and under researched, namely the resources that students themselves possessed. The study drew on case study material relating to the learning experienced by individual students to explore an emerging concept of reciprocal learning, both as a pedagogic relationship facilitative of inclusion and as a method for practitioner research. It is recommended that further exploration of the potential value of a reciprocal learning approach should form the basis of future research.
La máquinas de traducir : una demo para el discurso jurídico
Creators: name: Cerezo-Ceballos, Luis
Publisher: name: American University
Year: 2023

description: Published in: Cerezo, L. (2003). Las máquinas de traducir: una demo para el discurso jurídico. In R. Muñoz (Ed.), AIETI. Actas del I Congreso Internacional de la Asociación Ibérica de Estudios de Traducción e Interpretación. Granada: AIETI.
The effective Kondo model for a trimer on a metallic surface
Creators: name: Aligia, A. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: I consider a Hubbard-Anderson model which describes localized orbitals in three different atoms hybridized both among themselves and with a continuum of extended states (ES). Using a generalized Schrieffer-Wolf transformation, I derive an effective Kondo model for the interaction between the doublet ground state of the isolated trimer and the ES. For an isoceles trimer with distances a, l, l between the atoms, the Kondo temperature is negligigle for l < a and has a maximum for finite l > a when a is small. The results agree with experiments for a Cr trimer on Au(111). [T. Jamneala et al., Phys. Rev. Lett. 87, 256804 (2001)].
description: 4 pages, 3 figures, to appear in Phys. Rev. Lett. Clarifications on the parameters used were added
La máquinas de traducir : una demo para el discurso jurídico
Creators: name: Cerezo-Ceballos, Luis
Publisher: name: AIETI. Actas del I Congreso Internacional de la Asociación Ibérica de Estudios de Traducción e Interpretación
Year: 2023
Subjects: classificationCode: 47
subject: Language, communication and culture

description: Published in: Cerezo, L. (2003). Las máquinas de traducir: una demo para el discurso jurídico. In R. Muñoz (Ed.), AIETI. Actas del I Congreso Internacional de la Asociación Ibérica de Estudios de Traducción e Interpretación. Granada: AIETI.
Lateral plasmonic crystals: Tunability, dark modes, and weak-to-strong coupling transition
Creators: name: Gorbenko, I. V.
name: Kachorovskii, V. Yu.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study transmission of the terahertz radiation through a two-dimensional electron gas with a concentration controlled by grating gate electrodes. Voltage applied to these electrodes creates a lateral plasmonic crystal with a gate-tunable band structure. We find that only a part of plasmonic modes of such a crystal is seen in the transmission spectrum for the case of homogeneous excitation (so-called bright modes), while there also exist dark modes which show up only in a case of inhomogeneous excitation. We develop a theory that describes both weak- to strong- coupling transition in the crystal with increasing depth of the density modulation and a transition from resonant to super-resonant regime with increasing quality factor of the structure. We discuss very recent experiment, where transmission of the terahertz radiation through GaN/AlGaN based grating gate periodic structures was studied. We argue that this experiment represents an evidence of formation of the lateral plasmonic crystal with the band structure fully controlled by the gate electrodes, in a full agreement with developed theory
description: 20 pages, 15 figures, typos corrected
title: Students and Discourse: an Insider Perspective
Creators: name: Sinclair, Christine Moira
Publisher: name: The Open University
Year: 2004

description: A student's direct experience is used to explore the hypothesis that student problems may be associated with lack of exposure to appropriate discourse. I became a student again to find out about discourses that students encounter. Literature associated with student experience is reviewed from two perspectives: phenomenography and sociocultural theory. A critique of the former highlights the pervasive deep/surface/strategic distinction with respect to approaches to learning and suggests that there may be alternative descriptions that take more account of students' responses to discourse. While phenomenography offers some valuable observations on variation, the emphasis on outcomes and student predilections may mask some other important aspects of student experience. Sociocultural theory offers more reference points, at individual, social and cultural levels of analysis. I took an HNC and then a university module in Mechanical Engineering and used a reflective journal to record "what a student notices". I used this to produce "thick descriptions" of what was happening - that is, descriptions that took account of the sociocultural context and also of my own intentions and internalised , responses to the discourse. I explored exposure and barriers to four kinds of discourse: engineering, pedagogic, institutional and social. I then reviewed evidence for progress with the discourse. The thesis contributes insights into the many actions that a student undertakes in an attempt to engage in the activities of tertiary level education. A number of tensions and contradictions in higher education from a student's perspective are highlighted in the study. For example, access to HE may exclude access to its discourses; "outcomes" are not necessarily what they appear to be; some assessment may say more about a student's potential than about what they can do unaided. To succeed, students need a good deal of exposure to appropriate discourse practices as well as time to assimilate them.
SUITABILITY OF COMMUNAL REARING FOR PERFORMANCE TESTING OF TILAPIAS
Creators: name: McGinty, Andrew S.
name: McGinty, Andrew S.
Publisher: name: Unknown
Year: 1983
Subjects: Farm Management
Livestock Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Triplicate plastic pools were stocked separately with either Tilapia aurea, T. hornorum, T. nilotica, or Taiwanese red tilapia fingerlings (60 fish/pool) averaging 7.3, 5.7, 8.2, or 7.6 g, respectively. Three other plastic pools were stocked communally (mixed groups) with equal numbers of similarly sized fish of the above four groups. Fish were fed 32% protein sinking pellets at an initial rate of 5% and decreasing to 3.5% total body weight daily divided into two equal feedings. All the fish were harvested after 88 days. Gains in weight and total length for separately stocked pools were 62.8 g (78.8 mm), 59.8 g (79.0 mm),69.8 g (80.7 mm), and 73.5 g (86.0 mm); and for communally stocked pools were 64.6 g (77.2 mm), 61.5 g (79.5 mm), 70.6 g (81.7 mm), and 91.0 g (89.4 mm) for T. aurea, T. hornorum, T. nilotica, and Taiwanese red tilapia, respectively. Males gained more than females for all groups in separate and communal cultures, however, a significant group by sex interaction existed. In separately stocked pools, males gained 23, 119, 76 and 43% more in weight, and 12, 59, 35 and 21% more in length than females for T. aurea, T. hornorum, T. nilotica, and Taiwanese red tilapia, respectively. Rankings of gains were the same for separately and communally stocked pools indicating that communal rearing is an efficient means of performance testing tilapias.
A Classification of Spherically Symmetric Kinematic Self-Similar Perfect-Fluid Solutions. II
Creators: name: Maeda, Hideki
name: Harada, Tomohiro
name: Iguchi, Hideo
name: Okuyama, Naoya
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We give a classification of spherically symmetric kinematic self-similar solutions. This classification is complementary to that given in a previous work by the present authors [Prog. Theor. Phys. 108, 819 (2002)]. Dust solutions of the second, zeroth and infinite kinds, perfect-fluid solutions and vacuum solutions of the first kind are treated. The kinematic self-similarity vector is either parallel or orthogonal to the fluid flow in the perfect-fluid and vacuum cases, while the `tilted' case, i.e., neither parallel nor orthogonal case, is also treated in the dust case. In the parallel case, there are no dust solutions of the second (except when the self-similarity index $α$ is 3/2), zeroth and infinite kinds, and in the orthogonal case, there are no dust solutions of the second and infinite kinds. Except in these cases, the governing equations can be integrated to give exact solutions. It is found that the dust solutions in the tilted case belong to a subclass of the Lema{\^ i}tre-Tolman-Bondi family of solutions for the marginally bound case. The flat Friedmann-Robertson-Walker (FRW) solution is the only dust solution of the second kind with $α=3/2$ in the tilted and parallel cases and of the zeroth kind in the orthogonal case. The flat, open and closed FRW solutions with $p=-μ/3$, where $p$ and $μ$ are the pressure and energy density, respectively, are the only perfect-fluid first-kind self-similar solutions in the parallel case, while a new exact solution with $p=μ$, which we call the ``singular stiff-fluid solution'', is the only such solution in the orthogonal case. The Minkowski solution is the only vacuum first-kind self-similar solution both in the parallel and orthogonal cases. Some important corrections and complements to the authors' previous work are also presented.
description: 39 pages, 5 tables, 7 figures, revised version, comments on the Nariai solution are added, accepted for publication in Progress of Theoretical Physics
A Time Series Approach To Player Churn and Conversion in Videogames
Creators: name: del Río, Ana Fernández
name: Guitart, Anna
name: Periáñez, África
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applications (stat.AP)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Players of a free-to-play game are divided into three main groups: non-paying active users, paying active users and inactive users. A State Space time series approach is then used to model the daily conversion rates between the different groups, i.e., the probability of transitioning from one group to another. This allows, not only for predictions on how these rates are to evolve, but also for a deeper understanding of the impact that in-game planning and calendar effects have. It is also used in this work for the detection of marketing and promotion campaigns about which no information is available. In particular, two different State Space formulations are considered and compared: an Autoregressive Integrated Moving Average process and an Unobserved Components approach, in both cases with a linear regression to explanatory variables. Both yield very close estimations for covariate parameters, producing forecasts with similar performances for most transition rates. While the Unobserved Components approach is more robust and needs less human intervention in regards to model definition, it produces significantly worse forecasts for non-paying user abandonment probability. More critically, it also fails to detect a plausible marketing and promotion campaign scenario.
description: Accepted for publication in IOS Press Intelligent Data Analysis
Arthropitys renaultii Boureau 1964
Creators: name: Galtier, Jean
name: Ronchi, Ausonio
name: Broutin, Jean
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Equisetales
Calamitaceae
Arthropitys
Arthropitys renaultii

description: Arthropitys cf. renaultii Boureau, 1964   (Fig. 4A, E)
 This small stem, about 3 mm in diameter, shows an excellent preservation of the tissues. There are 17 primary xylem strands, with circular carinal canals, surrounding the pith (see detail on Figure 4E). The absence of any secondary xylem supports its interpretation as a very young twig. Other examples of similar small stems have been found with leaves attached. These stems are referred with some reservations, to A. renaultii Boureau, 1964 from the Lower Permian of Autun that represents a similar young stem devoid of secondary xylem, but with a larger number (34) of primary xylem strands and with a proportionally narrower cortex. In the present specimen the outer cortex is sclerenchymatous with alternating parenchyma (arrow, Fig. 4E) but the inner cortex shows larger cells (C, Fig. 4E).
description: Published as part of Galtier, Jean, Ronchi, Ausonio & Broutin, Jean, 2011, Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France), pp. 43-69 in Geodiversitas 33 (1) on page 50, DOI: 10.5252/g2011n1a4, http://zenodo.org/record/4596948
title: Who are Church Schools For? Towards an Ecclesiology for Church of England Voluntary Aided Secondary Schools
Creators: name: Shepherd, Peter William
Publisher: name: The Open University
Year: 2004

description: There is a mismatch between the Church of England's own self-conception and the realities of modern post-Christian England, which consists in a failure to recognise the vestigial nature and redundancy of a 'church for the nation' ecclesiology in an age when the CE is clearly, in classical sociological terms, a denomination-type. This impacts on the practice and perceived function of Anglican Christianity, and although baptism is treated as illustrative, the principle focus is the role and purpose of CE secondary schools, viewed theoretically within a spectrum of ecclesiological modelling, and more practically as responding to recent ecclesio-political imperatives, notably the Dearing Report of 2001, and the rhetoric and debate surrounding its release and subsequent mutation. The first section (Chapters 1 and 2) is diagnostic of the current state of the church, reviewing sociological and cultural theory, and arguing on ecclesiological grounds that the CE now has the status of one denomination among many, which implies a more modest and realistic role in its affairs, particularly in the education system, than the traditional ecclesia (church)/establishment model might have entailed. The second section (Chapters 3 - 6) traces the history of the CE's educational role, and examines the crucial issue for understanding the purpose of church schools: admissions policies. In this discussion the links between admission to the church (baptism) and admission to the church school are drawn out and explored. The framework established in the first section is used to illuminate the argument of the third section (Chapters 7 and 8) which provides a detailed account of the church's current role in education represented by the appearance and reception of the Dearing Report in 2001. The contention is that the attachment to the 'church for the nation' model has led to complicity with contemporary political expedients at the cost of a meaningful identity for church schools. The conclusion is that recognition of the more modest status of the CE would provide a clear rationale for its schools in particular, and Faith Schools in general. Chapter 8 offers an alternative voice to 'Dearing'. The final chapter, having investigated wider yet germane issues, provides an ecclesiological model of the 'single Faith nurture' school.
Teaching about computers and translation : THE COMPUTER AS A TUTOR AND THE INCIDENCE OF LEARNER’S AGENCY, FEEDBACK, AND GRAMMATICAL FORM IN SLA
Creators: name: Cerezo-Ceballos, Luis
Publisher: name: Trans
Year: 2023
Subjects: classificationCode: 47
subject: Language, communication and culture

description: Published in: Trans, No. 7, 2003.
Multiple Photonic Shells Around a Line Singularity
Creators: name: Arik, Metin
name: Delice, Ozgur
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Line singularities including cosmic strings may be screened by photonic shells until they appear as a planar wall.
description: 6 pages
Accurate Reproducing Kernel-Based Potential Energy Surfaces for the Triplet Ground States of N$_2$O and Dynamics for the N+NO$\leftrightarrow$O+N$_2$ and N$_2$+O$\rightarrow$2N+O Reactions
Creators: name: Koner, Debasish
name: Veliz, Juan Carlos San Vicente
name: Bemish, Raymond J.
name: Meuwly, Markus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Accurate potential energy surfaces (PESs) have been determined for the $^3$A$'$ and $^3$A$''$ states of N$_2$O using electronic structure calculations at the multireference configuration interaction level with Davidson correction (MRCI+Q) and the augmented Dunning-type correlation consistent polarize triple zeta (aug-cc-pVTZ) basis set. More than 20000 MRCI+Q/aug-cc-pVTZ energies are represented using a reproducing kernel Hilbert space (RKHS) interpolation scheme. The RKHS PESs successfully describe all reactant channels with high accuracy. The analytical PESs are characterized by computing the minima and transition states on it. Quasiclassical dynamics simulations are then used to determine thermal and vibrational relaxation rates for the N+NO and O+N$_2$ collisions. The agreement between results obtained from the simulations and from available experiments is favourable for both types of observables, which provides a test for the accuracy of the PESs. The PESs can be used to calculate more detailed state-to-state observables relevant for applications to hypersonic reentry.
description: 32 pages, 11 figures
COMPARATIVE STUDIES ON PROXIMATE COMPOSITION OF TILAPIA NILOTICA IN RELATION TO DIET TYPE
Creators: name: Kubarick, J.M.
name: Kubarick, J.M.
Publisher: name: Unknown
Year: 1983
Subjects: Livestock Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Tilapia has been called a miracle fish because of it's ability to feed low on the aquatic food chain but it is also capable of utilizing pelleted dry feeds for growth. The aim of this study was to examine the changes in the weight different body parts and the changes in the relative proportions of the major body constituents of T. nilotica raised on natural foods, a pelleted feed or a pelleted feed in combination with natural foods. For each 2-cm group (19-20 to 32-33 cm) fish that had access to both feed and natural productivity attained a greater average whole body weight and dressout weight than fish that only received a pelleted feed. Fish that had access to natural foods only, attained a maximum body length of 25-cm and a lower body weight for each respective 2-cm length group than those fish receiving a pelleted feed. The analyzed natural productivity raised fish had the highest percentage moisture content and the lowest percentage lipid content, for both whole body materia! and fillets. Fish that were able to utilize natural productivity and feed for growth had the highest percentage of protein for both whole body and fillets. With the three types of diets used in this study resulting in three different levels of gain and varying levels of proximate composition, it appears that these preliminary data indicates that the relative changes in body weight and body composition are strongly affected by the type of food consumed.
Inertia drives concentration-wave turbulence in swimmer suspensions
Creators: name: Jain, Purnima
name: Rana, Navdeep
name: Ramaswamy, Sriram
name: Perlekar, Prasad
Publisher: name: arXiv
Year: 2024
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We discover an instability mechanism in suspensions of self-propelled particles that does not involve active stress. Instead, it is driven by a subtle interplay of inertia, swimmer motility, and concentration fluctuations, through a crucial time lag between the velocity and the concentration field. The resulting time-persistent state seen in our high-resolution numerical simulations consists of self-sustained waves of concentration and orientation, transiting from regular oscillations to wave turbulence. We analyze the statistical features of this active turbulence, including an intriguing connection to the Batchelor spectrum of passive scalars.
description: 15 pages and 12 figures including supplementary material
THE SORGHUM CONVERSION PROGRAM
Creators: name: Quiles-Belén, A.
name: Sotomayor-Ríos, A.
name: Quiles-Belén, A.
name: Sotomayor-Ríos, A.
Publisher: name: Unknown
Year: 1983
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: The Sorghum Conversion Program (SCP), a joint venture by the Texas Agricultural Experiment Station (TAES) and the Tropical Agriculture Research Station (TARS), USDA, ARS, S&E, has provided new sorghum germplasra sources from the world collection, converting tall, late, or photoperiod sensitive sorghums from the tropics into short, early, photoperiod insensitive strains. At present there are 1,319 items in the SCP of which 423 have been fully converted. The SCP provides excellent material for breeding programs to improve traits such as disease and insect resistance, drought tolerance, sterility, yield, grain quality and others. Since there still exist numerous sorghums not yet studied, it is expected that the SCP will continue to make significant worldwide contributions as new desirable genes from different sorghum sources are identified.
Twistors and Holography
Creators: name: Chamblin, Andrew
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend Bousso's notion of a lightsheet - a surface where entropy can be defined in a way so that the entropy bound is satisfied - to more general surfaces. Intuitively these surfaces may be regarded as deformations of the Bousso choice; in general, these deformations will be timelike and so we refer to them as `timesheets'. We show that a timesheet corresponds to a section of a certain twistor bundle over a given spacelike two-surface B. We further argue that increasing the entropy flux through a given region corresponds to increasing the volume of certain regions in twistor space. We further argue that in twistor space, it might be possible to give a purely topological characterization of a lightsheet, at least for suitably simple spacetimes.
description: 4 pages revtex, clarifying remarks have been added, this is the version published in Classical and Quantum Gravity
The Ubiquitous Creeping Segments on Oceanic Transform Faults (supplementary)
Creators: name: Pengcheng, Shi
name: Meng (Matt) Wei
name: Pockalny, Robert A.
Publisher: name: Zenodo
Year: 2021

description: The supplementary material to The ubiquitous creeping segments on oceanic transform faults, Pengcheng Shi, Meng (Matt) Wei, Robert A. Pockalny, 2021. Link to GitHub.