cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Theory of Relativistic Jet Formation in Galactic Sources: Towards a Unified MOdel
Creators: name: Meier, David L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I review recent progress in the theory of relativistic jet production. The presently favored mechanism is an electrodynamic one, in which charged plasma is accelerated by electric fields that are generated by a rotating magnetic field. The most pressing issues of current interest are understanding what factors control the jet power, its speed, and its degree of collimation, and how these properties determine the type of jet observed and its effect on its environment. Recent observations of microquasars, pulsars, gamma-ray bursts (GRBs) and core-collapse supernovae indicate that jets play an important, and in some cases possibly dominant, role in each of these. The presence of a jet in all cases may provide an important clue to how these sources may be related. Based on these observations, and on recent theoretical investigations, I propose an evolutionary scheme that attempts to unify all of these relativistic galactic jet sources. I also discuss several important issues that must be resolved before this (or another scheme) can be adopted.
description: 8 pages, 1 figure; 4th Microquasar Workshop
Search for fermiophobic Higgs bosons in final states with photons at LEP 2
Creators: name: The DELPHI Collaboration
name: Abdallah, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Higgs boson production with subsequent decay to photons was searched for in the data collected by the DELPHI detector at centre-of-mass energies between 183 GeV and 209 GeV, corresponding to a total integrated luminosity of nearly 650 pb^{-1}. No evidence for a signal was found, and limits were set on h0Z0 and h0A0 production with h0 decay to photons. These results were used to exclude regions in the parameter space of fermiophobic scenarios of Two Higgs Doublet Models.
description: 24 pages, 6 figures, Accepted by Eur. Phys. J. C
Women, war, and text: Orsognese women's experience in a sector of the Italian front in World War II
Creators: name: Budani, Donna Martha
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 44
subject: Human society
classificationCode: 4401
subject: Anthropology
subject: FOS: Sociology
classificationCode: 4405
subject: Gender studies

description: The narratives that women related to this researcher about their lives in Orsogna, Italy during and immediately after World War II all serve to articulate assumptions about the perceived nature of community. I use data drawn from an examination of 150 narratives recorded in interviews, occurring in spontaneous conversations, and during field observations, as well as from an examination of my own reaction. These narratives allow listeners to participate provisionally in the disorder, dislocation, and privation experienced by the narrators in war. This study makes two significant contributions to our understanding of a community whose cultural fabric remained intact during extreme wartime conditions in one Italian sector. First, the narratives, as texts, reveal how women connected their experiences to the established cultural meanings of those experiences. That is, regular patterns of behavior occur as a result of practices generated in social interaction. Second, the narratives reveal that what was said depends for its full meaning and interpretive power on what was unsaid on beliefs, values, premises encoded in the cultural matrix of the community.
From the Inner to Outer Milky Way: A Photometric Sample of 2.6 Million Red Clump Stars
Creators: name: Lucey, Madeline
name: Ting, Yuan-Sen
name: Ramachandra, Nesar S.
name: Hawkins, Keith
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Large pristine samples of red clump stars are highly sought after given that they are standard candles and give precise distances even at large distances. However, it is difficult to cleanly select red clumps stars because they can have the same T$_{\mathrm{eff}}$ and log $g$ as red giant branch stars. Recently, it was shown that the asteroseismic parameters, $\rmΔ$P and $\rm{Δν}$, which are used to accurately select red clump stars, can be derived from spectra using the change in the surface carbon to nitrogen ratio ([C/N]) caused by mixing during the red giant branch. This change in [C/N] can also impact the spectral energy distribution. In this study, we predict the $\rmΔ$P, $\rm{Δν}$, T$_{\mathrm{eff}}$ and log $g$ using 2MASS, AllWISE, \gaia, and Pan-STARRS data in order to select a clean sample of red clump stars. We achieve a contamination rate of $\sim$20\%, equivalent to what is achieved when selecting from T$_{\mathrm{eff}}$ and log $g$ derived from low resolution spectra. Finally, we present two red clump samples. One sample has a contamination rate of $\sim$ 20\% and $\sim$ 405,000 red clump stars. The other has a contamination of $\sim$ 33\% and $\sim$ 2.6 million red clump stars which includes $\sim$ 75,000 stars at distances $>$ 10 kpc. For |b|>30 degrees we find $\sim$ 15,000 stars with contamination rate of $\sim$ 9\%. The scientific potential of this catalog for studying the structure and formation history of the Galaxy is vast given that it includes millions of precise distances to stars in the inner bulge and distant halo where astrometric distances are imprecise.
description: 18 pages, 13 figures, 2 tables, submitted to MNRAS
12th General Hospital final report. Amputations
Creators: name: Creator not identified.
Publisher: name: DigitalHub. Galter Health Sciences Library & Learning Center
Year: 1945
Subjects: subject: World War II
subject: 12th General Hospital
subject: Amputations
subject: Amputation, Surgical
subject: War-Related Injuries
subject: Leg Injuries
subject: Arm Injuries
subject: Hand Injuries
subject: Amputation [MeSH -2022]

description: This report consists of tables about hand, leg, and arm amputations conducted by the 12th General Hospital Unit in Ain-el-Turck (Algeria), Rome (Italy), and Livorno (Italy).
UBC South Campus Stormwater Detention Facility
Creators: name: Bertsch, Kieran
name: Cattani, Mauricio
name: Mazloum, Payam
name: Perez, Juan Sebastian
name: Safaei, Payman
name: Xing, Renpeng (Bill)
Publisher: name: The University of British Columbia
Year: 2017

description: The South Campus of UBC faces considerable risks in the case of extreme stormwater events from 10-year and 100-year floods. The project objectives are to minimize the flood water damage and erosion to the cliffs by designing a stormwater detention system to store the floods that may occur in the South Campus of UBC. The major concerns include significant damage to important buildings in the area and erosion of the cliffs on the opposite side of SW Marine Dr. The most viable solution is to build stormwater detention facilities to store the floodwater and release it at a rate that will reduce erosion to acceptable levels. Increasing the size of certain pipes and culverts may be necessary to handle the extra water flow. This report details chosen designs that are the most effective regarding functionality, construction and maintenance costs, and environmental impacts. Using data and rainfall models obtained through reports by GeoAdvice and Urban Systems, areas with the largest flood volumes are focused on for the most efficient location of the detention facilities. A single location will host a multi use dry pond facility with two other locations hosting cylindrical fiberglass tanks. The intersection of Wesbrook Mall and SW Marine Dr will accommodate a large dry pond facility with a 3000 m³ capacity, and cylindrical fiberglass tanks will be installed at Wesbrook and 16th Ave and TRIUMF Centre with 1135 m³ and 210 m³ capacities respectively. These designs accomplish the technical requirements of the project effectively, and these are cost effective, environmentally sustainable and in line with UBC sustainability goals. The multipurpose dry pond facility engages the community and invites community ownership with its design, which encourages the facilities use outside of storm events. After detailed analysis of the different components of the project, the total cost is $3,619,054. The duration of this project is estimated to be 161 days, starting notifications at the beginning of March, and finishing construction by the start of September 2016. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Microeconometric evaluation of natural resource scarcity under restricted cost minimization theory: Sensitivity, theoretical consistency, and structural dynamics
Creators: name: Escalante, Andres Alejandro
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 38
subject: Economics
classificationCode: 3803
subject: Economic theory

description: Rent can be derived from the variable cost function by invoking Hotelling's lemma. Determining rent endogenously controls for data limitations; but also brings forth important methodological issues, intrinsic to using an economic foundation for measuring resource scarcity, which have not been comprehensively addressed in the literature. It is surprising, for example, that no one has investigated the sensitivity of rent, as a measure of resource scarcity, to assumptions involved in specifying the econometric model used to describe production technology. This dissertation has two objectives. The first consists of evaluating the sensitivity of rent, as a resource scarcity measure, to econometric specifications of the variable cost function to assess whether assumptions on model characteristics translate into statistically different rent estimates. The second objective is to quantitatively determine whether research decisions and theoretical consistency affect information content of a resource scarcity measure based on rent. Restricted cost minimization theory serves as organizing principle. The translog is used to detail six econometric specifications for the variable cost function based on research decisions that define model characteristics before and after estimation. Labor, energy, and materials are treated as variable inputs, and capital and reserves as quasifixed. Temporary equilibrium with respect to capital is assumed. These models are estimated using iterative SUR and nonlinear MLE. Canadian asbestos industry 1953-1985 time-series data are used. The sensitivity analysis consists of two parts. The first examines whether rent is statistically different across models. The second part fits a response surface to rent in order to evaluate its robustness to research decisions. Rent movement and direction are examined with a correlation matrix and trend estimates. The broad conclusion to emerge from this dissertation is that research decisions make a difference but not to the extent that they affect the informational consistency of rent as a scarcity measure. Particularly, rent is sensitive to assumptions on scale, technical change, and equilibrium; it is also sensitive to regularity properties. Rent is informationally consistent because it moves unidirectionally across models suggesting increasing scarcity over the sample period. These findings lend support to a microeconomic approach to measuring resource scarcity based on classical econometrics.
Microeconometric evaluation of natural resource scarcity under restricted cost minimization theory: Sensitivity, theoretical consistency, and structural dynamics
Creators: name: Escalante, Andres Alejandro
Publisher: name: American University
Year: 2023

description: Rent can be derived from the variable cost function by invoking Hotelling's lemma. Determining rent endogenously controls for data limitations; but also brings forth important methodological issues, intrinsic to using an economic foundation for measuring resource scarcity, which have not been comprehensively addressed in the literature. It is surprising, for example, that no one has investigated the sensitivity of rent, as a measure of resource scarcity, to assumptions involved in specifying the econometric model used to describe production technology. This dissertation has two objectives. The first consists of evaluating the sensitivity of rent, as a resource scarcity measure, to econometric specifications of the variable cost function to assess whether assumptions on model characteristics translate into statistically different rent estimates. The second objective is to quantitatively determine whether research decisions and theoretical consistency affect information content of a resource scarcity measure based on rent. Restricted cost minimization theory serves as organizing principle. The translog is used to detail six econometric specifications for the variable cost function based on research decisions that define model characteristics before and after estimation. Labor, energy, and materials are treated as variable inputs, and capital and reserves as quasifixed. Temporary equilibrium with respect to capital is assumed. These models are estimated using iterative SUR and nonlinear MLE. Canadian asbestos industry 1953-1985 time-series data are used. The sensitivity analysis consists of two parts. The first examines whether rent is statistically different across models. The second part fits a response surface to rent in order to evaluate its robustness to research decisions. Rent movement and direction are examined with a correlation matrix and trend estimates. The broad conclusion to emerge from this dissertation is that research decisions make a difference but not to the extent that they affect the informational consistency of rent as a scarcity measure. Particularly, rent is sensitive to assumptions on scale, technical change, and equilibrium; it is also sensitive to regularity properties. Rent is informationally consistent because it moves unidirectionally across models suggesting increasing scarcity over the sample period. These findings lend support to a microeconomic approach to measuring resource scarcity based on classical econometrics.
Binomial multiplicative model of critical fragmentation
Creators: name: Katsuragi, Hiroaki
name: Sugino, Daisuke
name: Honjo, Haruo
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We report the binomial multiplicative model for low impact energy fragmentation. Impact fragmentation experiments were performed for low impact energy region, and it was found that the weighted mean mass is scaled by the pseudo control parameter multiplicity. We revealed that the power of this scaling is a non-integer (fractal) value and has a multi-scaling property. This multi-scaling can be interpreted by a binomial multiplicative (simple biased cascade) model. Although the model cannot explain the power-law of fragment-mass cumulative distribution in fully fragmented states, it can produce the multi-scaling exponents that agree with experimental results well.
description: 10 pages, 6 figures, A typo in Eq.(6b) was improved in Ver.2
Higher Order Recurrences for Analytical Functions of Tchebysheff Type
Creators: name: Kwasniewski, A. K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 12Exx:12E10

description: One parameter subgroups of the group of hyperbolons of volume one when exploited accurately allow one to define and investigate higher order hyperbolic-trigonometric generalization of corresponding polynomials. In parallel functions of roots of polynomials of any degree are studied as possible extension of symmetric functions considered one hundred twenty six years ago in the inspiring famous lucasian paper.
description: 14 pages
title: The representation and interpretation of change in intimate relationships: A study of homosexual and heterosexual couples
Creators: name: Satchell, Margaret G.
Publisher: name: The Open University
Year: 2001

description: Stemming from an interest in the process of therapeutic change in couple relationships, this study was undertaken in order to access people's narratives of change, and discover factors seen as important in their re-construction of the process. Twenty-five couples in close relationships w«e interviewed - eight homosexual and seventeen heterosexual. Five of the heterosexual couples were in therapy. A qualitative analysis of couple's narratives was conducted with the aim of identifying themes relevant to change as an experience; relationship changes in terms of the couple’s own idiosyncratic choice of life events; and cultural discourses likely to constrain or enrich the change process. The findings suggested that couples talk about change in similar ways. However, several themes emerged reflecting discourses and presentation features that discriminated between couples. These were particular relationship themes, the comparison between past and present, the role of others, orientation issues, and aspects of interactional style. The study suggests that cultural discourses, and distinctive use of change measures such as coping strategies, are implicated in how change is accomplished and given meaning.
On the functional test of the GPGPU scheduler
Creators: name: Rodriguez Condia, Josie Esteban
name: Du, Boyang
name: Sterpone, Luca
name: Sonza Reorda, Matteo
Publisher: name: Zenodo
Year: 2018
Subjects: GPUs
In-field testing
SBST
testing

description: Slides of the presentation performed at the workshop on Self-driving Cars and Reliability, Rutherford Appleton Laboratory, Harwell Campus, UK
Culture change along the tobacco coast: 1670-1720
Creators: name: Pogue, Dennis James
Publisher: name: American University
Year: 2023

description: This study tests the proposition that Anglo-American culture in the Chesapeake Bay region, Maryland and Virginia, changed significantly during the period 1670 to 1720. This is accomplished by measuring temporal variation in selected categories of material culture: architecture, food remains, ceramics, and domestic furnishings and utensils taken to represent living standards. Directional changes in patterns of variation for each material category together are inferred as representing a shift in cultural norms. These changes are causally related to a broader cultural shift occurring throughout Anglo-America and northern Europe. The specific trajectory of change in the Chesapeake is embedded in local conditions of social development reflecting adaptation to the alien environment and a resulting cultural impoverishment. Manifestation of a consumer revolution in the 18th century is attributed to the transformation of the Chesapeake from a society that was relatively unstructured to one that was stratified and led by a creole gentry elite.
Meson-Nucleon Vertex Form Factors at Finite Temperature Using a Soft Pion Form Factor
Creators: name: Yakhshiev, U. T.
name: Thomas, A. W.
name: Khanna, F. C.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The temperature and density dependence of the meson-nucleon vertex form factors is studied in the framework of thermofield dynamics. Results are obtained for two rather different nucleon-nucleon potentials: the usual Bonn potential and the variation with a softer $πNN$ form factor, due to Holinde and Thomas. In general, the results show only a modest degree of sensitivity to the choice of interaction.
description: 5 pages, uses revtex4
Culture change along the tobacco coast: 1670-1720
Creators: name: Pogue, Dennis James
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 43
subject: History, heritage and archaeology
classificationCode: 4301
subject: Archaeology
classificationCode: 4303
subject: Historical studies

description: This study tests the proposition that Anglo-American culture in the Chesapeake Bay region, Maryland and Virginia, changed significantly during the period 1670 to 1720. This is accomplished by measuring temporal variation in selected categories of material culture: architecture, food remains, ceramics, and domestic furnishings and utensils taken to represent living standards. Directional changes in patterns of variation for each material category together are inferred as representing a shift in cultural norms. These changes are causally related to a broader cultural shift occurring throughout Anglo-America and northern Europe. The specific trajectory of change in the Chesapeake is embedded in local conditions of social development reflecting adaptation to the alien environment and a resulting cultural impoverishment. Manifestation of a consumer revolution in the 18th century is attributed to the transformation of the Chesapeake from a society that was relatively unstructured to one that was stratified and led by a creole gentry elite.
title: Between Master Plans and Advanced Information Technology: is there a site for Brazilian Cities in the Global Network? The Case of Porto Alegre
Creators: name: da Cruz Fagundes, Thêmis
Publisher: name: The Open University
Year: 2001

description: This thesis consists of an investigation of the impact of information technology on participatory planning practices and social changes in urban governance. A multidisciplinary approach is adopted in which three fields intersect and link with information technology - these being urban space, urban planning and socio-cognition. This framework is derived from four theoretical perspectives: Castells' theorisation of the network society, the paradigmatic shift in the urban planning praxis towards a communicative rationality, Piaget's genetic epistemological Constructivism, and the current concept of cyberspace. It is argued that informational space is a social construction and that knowledge may be considered as the raw material to fight social inequality. A qualitative socio-cognitive perspective is thus employed to study the rise of citizenship movements and enable an investigation to be carried out into social relations and the development of knowledge in the new digital environment, having the city of Porto Alegre, Brazil, as a case study. The inquiry as a whole seeks to improve our understanding of the kind of social learning processes that might empower citizens' participation by exploring grassroots participatory practices in emergent informational space. The work involved undertaking an examination of social relations within the institutional digital environment by means of a socio- cognitive clinical method. Semi-structured and open interviews were carried out to study 30 selected subjects (local politicians, academics, technocrats, and community leaders) in Porto Alegre - a city which has been associated with radical democratic planning practices over 12 years, with an effort to build participatory informational space. The investigation of the characteristics of social relations and participatory practices in the urban governance context and the initial stages of institutional digital environments provided evidence that an embryonic process of citizenship empowerment was emerging in informational space, associated with radical changes in cognitive learning processes. This is a dialectical process that involves the re- articulation of local power relationships in the struggle to build networks of social change.
Garcinia celebica Linnaeus 1754
Creators: name: Turner, I. M.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Malpighiales
Clusiaceae
Garcinia
Garcinia celebica

description: Garcinia celebica Linnaeus (1754: 7).
 Brindonia celebica (L.) Thouars in Cuvier (1806: 341). Garcinia triflora Stokes (1812: 12), nom. superfl. Oxycarpus celebica (L.) Poiret (1816: 258). Stalagmitis celebica (L.) Don (1831: 621). Lectotype (designated by Merrill 1917): Herb. Amb. 1 (1741) 134, t. 44.
 Oxycarpus indica auct. non (Thouars) Desr.: Hamilton (1826: 346). Voucher: INDIA. Calcutta, Honourable East India Company’s Botanical Garden, Anonymous s.n., 30 November 1814 ([EIC 4852B] ex Herb. Hamilton (K-W); 1118 (E)).
 Garcinia cornea auct. non L: Roxb. (1832: 629). Voucher: INDIA. s. loc., Anonymous s.n., s. dat. ([EIC 4852A] ex Herb. Roxburgh (K-W)).
 Garcinia pictoria was not published by Buchanan-Hamilton and its authorship is correctly referred to Roxburgh. There are some obvious differences between Roxburgh’s description of G. pictoria and Buchanan- Hamilton’s account of Oxycarpus indica. Most notably Roxburgh states that G. pictoria is only known from the highest parts of Wynaad District (in what is now the state of Kerala in south-west India) and attempts to bring it in to cultivation in the lowlands have repeatedly failed. There are also Roxburgh icons [available online at: http://apps.kew.org/floraindica/home.do] of Garcinia cornea [1446] and G. pictoria [2279] that show them to be different. The Garcinia from the Calcutta garden is not G. pictoria as published by Roxburgh. Garcinia pictoria Roxb. is generally considered a synonym of Garcinia morella (Gaertn.) Desr., though Maheshwari (1964) in a revision of Indian Garcinia kept it separate. There is a G. pictoria specimen in the herbarium of the Natural History Museum (BM), annotated ‘Flowers of the Wynaad Gamboge tree from Mr Dyer’, which is suitable as a lectotype for the species.
description: Published as part of Turner, I. M., 2011, The contribution of Sir William Brooke O'Shaughnessy (1809 - 1889) to plant taxonomy, pp. 57-63 in Phytotaxa 15 on page 61, DOI: 10.11646/phytotaxa.15.1.7, http://zenodo.org/record/4907562
At what price fame: A comparative analysis of how men and women experience fame
Creators: name: Way, Karen
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 44
subject: Human society
classificationCode: 4405
subject: Gender studies
classificationCode: 4410
subject: Sociology
subject: FOS: Sociology

description: This dissertation is an exploratory study of how the experience of a famous role-identity affects men's and women's sense of achievement in their occupations and in their public and private interactions. The study is a comparative analysis of the experiences of thirty male and female stars in performance occupations, located in four cultural industries--radio, TV news, TV acting, and rock music. Through in-depth, semi-structured interviews, the researcher explored gender differences in male and female performers' aspirations, explanations and understandings of their success, the nature of their frontstage (public) interactions with fans and anonymous others, the nature of their backstage (private) interactions with family and intimate others (Goffman 1959), and characteristics of the experience of fame and stardom that might contribute to the experience of role-person merger (Turner 1978). The most significant gender differences in this study were found in the ways that experiencing a famous role-identity may affect backstage relationships with family and intimate others, particularly in the challenges of balancing high-profile careers and family lives (for women--but not men--with families); the ways in which male performers perceived that their fame affected their children's lives; the negative effects that a famous role-identity may have in relationships with spouses and significant others; and difficulties in finding "suitable" dating partners, particularly for women.
At what price fame: A comparative analysis of how men and women experience fame
Creators: name: Way, Karen
Publisher: name: American University
Year: 2023

description: This dissertation is an exploratory study of how the experience of a famous role-identity affects men's and women's sense of achievement in their occupations and in their public and private interactions. The study is a comparative analysis of the experiences of thirty male and female stars in performance occupations, located in four cultural industries--radio, TV news, TV acting, and rock music. Through in-depth, semi-structured interviews, the researcher explored gender differences in male and female performers' aspirations, explanations and understandings of their success, the nature of their frontstage (public) interactions with fans and anonymous others, the nature of their backstage (private) interactions with family and intimate others (Goffman 1959), and characteristics of the experience of fame and stardom that might contribute to the experience of role-person merger (Turner 1978). The most significant gender differences in this study were found in the ways that experiencing a famous role-identity may affect backstage relationships with family and intimate others, particularly in the challenges of balancing high-profile careers and family lives (for women--but not men--with families); the ways in which male performers perceived that their fame affected their children's lives; the negative effects that a famous role-identity may have in relationships with spouses and significant others; and difficulties in finding "suitable" dating partners, particularly for women.
The Theory and Simulation of Relativistic Jet Formation: Towards a Unified Model For Micro- and Macroquasars
Creators: name: Meier, David L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I review recent progress in the theory of relativistic jet production, with special emphasis on unifying black hole sources of stellar and supermassive size. Observations of both classes of objects, as well as theoretical considerations, indicate that such jets may be launched with a spine/sheath flow structure, having a much higher Lorentz factor ($\sim 50$) near the axis and a lower speed ($Γ\sim 10$ or so) away from the axis. It has become clear that one can no longer consider models of accretion flows without also considering the production of a jet by that flow. Furthermore, the rotation rate of the black hole also must be taken into account. It provides a third parameter that should break the mass/accretion rate degeneracy and perhaps explain why some sources are radio loud and some radio quiet. Slow jet acceleration and collimation is expected theoretically, and can explain some of the observed features of AGN jet sources. Finally, relativistic jets launched by MHD/ED processes are Poynting flux dominated by nature, and are potentially unstable if there is significant entrainment of thermal material.
description: 6 pages, 1 figure; in The physics of relativistic jets in the CHANDRA and XMM era, Bologna, 23-27 Sept 2002
Investigation of different parameters influencing tunnel face pressure in soft ground using upper bound limit analysis method (in Persian)
Creators: name: Jafari, Pooyan
name: Fahimifar, Ahmad
Publisher: name: figshare
Year: 2022
Subjects: subject: 90501 Civil Geotechnical Engineering
subject: FOS: Civil engineering

description: The face stability of tunnels in soft grounds is investigated in this paper. In the framework of the kinematic approach of limit analysis, a two-dimensional failure mechanism based on the translational and rotational movement of rigid blocks is proposed in order to calculate the critical face pressure by employing the optimization tools in Matlab software. In order to verify the proposed mechanism, the results obtained from this failure mechanism were compared to those of the finite element simulations (Plaxis software) and other existing approaches. This Mechanism is presented in such a way that can consider the arching effect in tunnel face collapse. The analytical results obtained from the proposed mechanism are in good agreement with the numerical results. The results show that the internal friction angle of the soil has a great influence on the necessary face pressure and as the internal friction angle of soil increases, the support pressure required to maintain the stability of tunnel face decreases.
First-principles study of the low-temperature charge density wave phase in the quasi-one-dimensional Weyl chiral compound (TaSe$_4$)$_2$I
Creators: name: Zhang, Yang
name: Lin, Ling-Fang
name: Moreo, Adriana
name: Dong, Shuai
name: Dagotto, Elbio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using {\it ab initio} density functional theory, we study the lattice phase transition of quasi-one-dimensional (TaSe$_4$)$_2$I. In the undistorted state, the strongly anisotropic semimetal band structure presents two non-equivalent Weyl points. In previous efforts, two possible Ta-tetramerization patterns were proposed to be associated with the low-temperature structure. Our phonon calculations indicate that the orthorhombic $F222$ CDW-I phase is the most likely ground state for this quasi-one-dimensional system. In addition, the monoclinic $C2$ CDW-II phase may also be stable according to the phonon dispersion spectrum. Since these two phases have very similar energies in our DFT calculations, both these Ta-tetramerization distortions likely compete or coexist at low temperatures. The semimetal to insulator transition is induced by a Fermi-surface-driven instability that supports the Peierls scenario, which affects the Weyl physics developed above $T_{\rm CDW}$. Furthermore, the spin-orbit coupling generates Rashba-like band splittings in the insulating CDW phases.
description: 6 pages 6 figures
Collins fragmentation function from gluon rescattering
Creators: name: Bacchetta, Alessandro
name: Metz, Andreas
name: Yang, Jian-Jun
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We estimate the Collins fragmentation function by introducing the effect of gluon rescattering in a model calculation of the fragmentation process. We include all necessary diagrams to the one-loop level and compute the nontrivial phases giving rise to the Collins function. We compare our results to the ones obtained from pion rescattering. We conclude that three out of four one-loop diagrams give sizeable contributions to the Collins function, and that the effect of gluon rescattering has a magnitude comparable to that of pion rescattering, but has opposite sign.
description: 6 pages, 5 figures, uses RevTex. Typos corrected and a sentence added in the conclusions. To be published in PLB
Parks, people, and paradigms: Protected areas in Ecuador and Botswana
Creators: name: Alberti, Francesco Joseph
Publisher: name: American University
Year: 2023

description: Within the theoretical concepts informing the development community in recent years there has been a paradigm shift away from neoclassical models toward other ideas, those containing "sustainable development" and "Alternative" components. Concurrently in the conservation field, there is an analogous shift from the traditional "Environmental Protection" model to one characterized by sustainable utilization, or the "Resource Management" paradigm; there also have been theoretical advances toward "Eco-Development" and other elements of the Alternative paradigm. This dissertation seeks to make an in-depth study of major threats to, and some international and domestic interests affecting the establishment and maintenance of, protected areas (national parks, wildlife reserves, etc.) in the developing nations. The research agenda aims at identifying the fundamental causes of protected area problems. Two primary cases have been selected for study: Galapagos National Park in Ecuador, and Moremi Game Reserve in Botswana. They are buttressed by examples taken also from Yasuni and Chobe National Parks in Ecuador and Botswana, respectively. Galapagos is characterized by problems associated with human ecology, while Moremi is threatened by possible water offtake from the Okavango Delta. Drawing upon the empirical evidence contained in the case studies, the author seeks to develop conclusions which may have broader applications. Two important findings are: (1) that there is a notable disconnect between the more advanced theoretical paradigms embodying sustainability and based upon popular participation, and the reality of current protected area management, which largely continues to be based upon exclusionist conservation models in the traditional "Environmental Protection" mold; and (2) that most human-caused protected area problems ultimately derive from political, economic, and social inequalities. The study also validates or disproves certain conventional wisdom concerning the influence of international and domestic factors, especially non-governmental organizations and indigenous organizations, on the apparent conflict between development and conservation. This information may be of use in addressing policy-related questions about the role and management of protected areas in sustainable development.
OER Element
Creators: name: Winkler, Margit
Publisher: name: Graz University of Technology
Year: 2025

description: Illustration of Teaching methodology in Lecture 'Industrial Biotechnology' 

Picture painted in Aquarell style, converted to JPEG by taking a photo with a Nikon D7000

Part of Exercise for course 'Open Educational Resources verwenden, erstellen, veröffentlichen' by Martin Ebner
Solving Witten's SFT by Insertion of Operators on Projectors
Creators: name: Yang, Haitang
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Following Okawa, we insert operators at the boundary of regulated star algebra projectors to construct the leading order tachyon vacuum solution of open string field theory. We also calculate the energy density of the solution and the ratio between the kinetic and the cubic terms. A universal relationship between these two quantities is found. We show that for any twist invariant projector, the energy density can account for at most 68.46% of the D25-brane tension. The general results are then applied to regulated slivers and butterflies, and the next-to-leading order solution for regulated sliver states is constructed.
description: 24 pages, 4 figures
A jamming plane of sphere packings
Creators: name: Jin, Yuliang
name: Yoshino, Hajime
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The concept of jamming has attracted great research interest due to its broad relevance in soft matter such as liquids, glasses, colloids, foams, and granular materials, and its deep connection to the sphere packing problem and optimization problems. Here we show that the domain of amorphous jammed states of frictionless spheres can be significantly extended, from the well-known jamming-point at a fixed density, to a jamming-plane that spans the density and shear strain axes. We explore the jamming-plane, via athermal and thermal simulations of compression and shear jamming, with a help of an efficient swap algorithm to prepare initial equilibrium configurations. The jamming-plane can be divided into reversible-jamming and irreversible-jamming regimes, based on the reversibility of the route from the initial configuration to jamming. Our results suggest that the irreversible-jamming behavior reflects an escape from the meta-stable glass basin to which the initial configuration belongs to, or the absence of such basins. All jammed states, either compression or shear jammed, are isostatic, and exhibit jamming criticality of the same universality class. However, the anisotropy of contact networks non-trivially depends on the jamming density and strain. Among all state points on the jamming-plane, the jamming-point is a unique one with the minimum jamming density and the maximum randomness. For lattice packings, the jamming-plane shrinks into a single shear jamming-line that is independent of initial configurations. Our study paves the way for solving the long-standing random close packing problem, and provides a more complete framework to understand jamming.
description: 28 pages, 23 figures
Garcinia pictoria Roxburgh 1832
Creators: name: Turner, I. M.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Malpighiales
Clusiaceae
Garcinia
Garcinia pictoria

description: Garcinia pictoria Roxburgh (1832: 627).
 Hebradendron pictorium (Roxb.) Lindley (1838: 114). Lectoype (designated here): INDIA. Wynaad, Roxburgh 180 (BM-000611609).
 What remains unclear is whether Roxburgh did indeed apply the name Garcinia pictoria, at least for a while, to the G. celebica trees in Calcutta, or whether Buchanan-Hamilton erred in this matter.
description: Published as part of Turner, I. M., 2011, The contribution of Sir William Brooke O'Shaughnessy (1809 - 1889) to plant taxonomy, pp. 57-63 in Phytotaxa 15 on page 62, DOI: 10.11646/phytotaxa.15.1.7, http://zenodo.org/record/4907562
Entanglement transfer during quantum frequency conversion in gas-filled hollow-core fibers
Creators: name: Gonzalez-Raya, Tasio
name: Mena, Arturo
name: Lazo, Miriam
name: Leggio, Luca
name: Novoa, David
name: Sanz, Mikel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quantum transduction is essential for the future hybrid quantum networks, connecting devices across different spectral ranges. In this regard, molecular modulation in hollow-core fibers has proven to be exceptional for efficient and tunable frequency conversion of arbitrary light fields down to the single-photon limit. However, insights on this conversion method for quantum light have remained elusive beyond standard semiclassical models. In this Letter, we employ a quantum Hamiltonian framework to characterize the behavior of entanglement during molecular modulation, while describing the quantum dynamics of both molecules and photons in agreement with recent experiments. In particular, apart from obtaining analytical expressions for the final opto-molecular states, our model predicts a close correlation between the evolution of the average photon numbers and the transfer of entanglement between the interacting parties. These results will contribute to the development of new fiber-based strategies to tackle the challenges associated with the upcoming generation of lightwave quantum technologies.
description: Accepted version
Shortcuts to adiabaticity for an interacting Bose-Einstein condensate via exact solutions of the generalized Ermakov equation
Creators: name: Huang, Tang-You
name: Malomed, Boris A.
name: Chen, Xi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Shortcuts to adiabatic expansion of the effectively one-dimensional Bose-Einstein condensate (BEC) loaded in the harmonic-oscillator (HO) trap is investigated by combining techniques of the variational approximation and inverse engineering. Piecewise-constant (discontinuous) intermediate trap frequencies, similar to the known bang-bang forms in the optimal-control theory, are derived from an exact solution of a generalized Ermakov equation. Control schemes considered in the paper include imaginary trap frequencies at short time scales, i.e., the HO potential replaced by the quadratic repulsive one. Taking into regard the BEC's intrinsic nonlinearity, results are reported for the minimal transfer time, excitation energy (which measures deviation from the effective adiabaticity), and stability for the shortcut-to-adiabaticity protocols. These results are not only useful for the realization of fast frictionless cooling, but also help to address fundamental problems of the quantum speed limit and thermodynamics.
description: 9 pages, 6 figures, to be published in Chaos
Parks, people, and paradigms: Protected areas in Ecuador and Botswana
Creators: name: Alberti, Francesco Joseph
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 41
subject: Environmental sciences
classificationCode: 4104
subject: Environmental management
classificationCode: 410404
subject: Environmental management
classificationCode: 44
subject: Human society

description: Within the theoretical concepts informing the development community in recent years there has been a paradigm shift away from neoclassical models toward other ideas, those containing "sustainable development" and "Alternative" components. Concurrently in the conservation field, there is an analogous shift from the traditional "Environmental Protection" model to one characterized by sustainable utilization, or the "Resource Management" paradigm; there also have been theoretical advances toward "Eco-Development" and other elements of the Alternative paradigm. This dissertation seeks to make an in-depth study of major threats to, and some international and domestic interests affecting the establishment and maintenance of, protected areas (national parks, wildlife reserves, etc.) in the developing nations. The research agenda aims at identifying the fundamental causes of protected area problems. Two primary cases have been selected for study: Galapagos National Park in Ecuador, and Moremi Game Reserve in Botswana. They are buttressed by examples taken also from Yasuni and Chobe National Parks in Ecuador and Botswana, respectively. Galapagos is characterized by problems associated with human ecology, while Moremi is threatened by possible water offtake from the Okavango Delta. Drawing upon the empirical evidence contained in the case studies, the author seeks to develop conclusions which may have broader applications. Two important findings are: (1) that there is a notable disconnect between the more advanced theoretical paradigms embodying sustainability and based upon popular participation, and the reality of current protected area management, which largely continues to be based upon exclusionist conservation models in the traditional "Environmental Protection" mold; and (2) that most human-caused protected area problems ultimately derive from political, economic, and social inequalities. The study also validates or disproves certain conventional wisdom concerning the influence of international and domestic factors, especially non-governmental organizations and indigenous organizations, on the apparent conflict between development and conservation. This information may be of use in addressing policy-related questions about the role and management of protected areas in sustainable development.