cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The host galaxies of strong Ca II quasar absorption systems at z 0.5
Creators: name: Zych, Berkeley J.
name: Murphy, Michael
name: Pettini, Max
name: Hewett, Paul C.
name: Ryan-Weber, Emma
name: Ellison, Sara L.
Publisher: name: Swinburne
Year: 2024

description: We present new imaging and spectroscopic observations of the fields of five quasars with very strong intervening Ca II absorption systems at redshifts z(abs) < 0.5 selected from the Sloan Digital Sky Survey. Recent studies of these very rare absorbers indicate that they may be related to damped Lyman alpha systems (DLAs). In all five cases, we identify a galaxy at the redshift of the Ca II system with impact parameters up to similar to 24 kpc. In four out of five cases the galaxies are luminous ( L similar or equal to L*), metal-rich ( Z similar or equal to Z(circle dot)), massive (velocity dispersion sigma similar or equal to 100 km s(-1)) spirals. Their star formation rates (SFRs), deduced from Ha emission, are high, in the range SFR = 0.3-30 M-circle dot yr(-1). In our analysis, we paid particular attention to correcting the observed emission-line fluxes for stellar absorption and dust extinction. We show that these effects are important for a correct SFR estimate; the difficulties of incorporating such corrections in previous low-z studies of DLA-selected galaxies has probably led to an underestimate of the star formation activity in at least some DLA hosts. We discuss possible links between Ca II-selected galaxies and DLAs and outline future observations which will help clarify the relationship between these different classes of quasar absorbers.
A correlation between galaxy morphology and Mg II halo absorption strength
Creators: name: Kacprzak, Glenn
name: Churchill, Christopher W.
name: Steidel, Charles C.
name: Murphy, Michael
name: Evans, Jessica L.
Publisher: name: Swinburne
Year: 2024

description: We compared the quantified morphological properties of 37 intermediate redshift Mg II absorption selected galaxies to the properties of the absorbing halo gas [ 0.03 angstrom <= W-r( 2796) <= 2.90 angstrom], observed in the spectra of background quasars. The galaxy morphologies were measured using GIM2D modeling of Hubble Space Telescope WFPC2 images and the absorbing gas properties were obtained from Keck HIRES and VLT UVES quasar spectra. We found a 3.1 sigma correlation between galaxy morphological asymmetries normalized by the quasar-galaxy projected separations, A/D, and the Mg II rest-frame equivalent widths. Saturation effects cause increased scatter in the relationship with increasing Wr( 2796). We defined a subsample of 28 systems for which the fraction of saturated pixels in the absorption profiles is f(sat) < 0.5. The correlation strengthened to 3.3 sigma. We also find a paucity of small morphological asymmetries for galaxies selected by Mg II absorption as compared to those of the general population of field galaxies, as measured in the Medium Deep Survey. The K-S probability that the two samples are drawn from the same galaxy population is ruled out at a 99.8% confidence level. The A/D-W-r( 2796) correlation suggests a connection between the processes that perturb galaxies and the quantity of gas in their halos, normalized by the impact parameter. It is clear that dramatic processes or events are not required for a galaxy to have an extended halo; the galaxies appear 'normal'. We suggest that processes that populate halos with gas, such as satellite galaxy merging, accretion of the local cosmic web, and longer range galaxy-galaxy interactions, also induce the observed minor perturbations in the galaxies.
Brokering Authority Steve Rhee Dissertation 2006
Creators: name: Rhee, Steve
Publisher: name: figshare
Year: 2014
Subjects: subject: Environmental Science
subject: Sociology
subject: FOS: Sociology
subject: Anthropology

description: CITATION: Rhee, Steve. 2006. Brokering Authority: Translating knowledge, policy and practice in forestry institutions in Indonesia. New Haven: Yale University (dissertation). This dissertation examines the nexus of research, policy and practice from village to global levels regarding forest management and local communities’ control over forest resources and improved local livelihoods in Indonesia. I investigate how problems and solutions are articulated; how these articulations are transformed in practice; how practice is translated into knowledge or policy; and how particular interpretations of practices become authoritative. In doing so, I examine the culture of and relationships between forestry institutions in Indonesia, highlighting the role of brokers of authority -- individuals and/or organizations that skillfully translate social reality into an “order” that not only resonates with the different logics, interests, and expectations of relevant institutions, but also recruits support for their interpretation to become authoritative. The Center for International Forestry Research (CIFOR) and the Donor Forum on Forestry in Indonesia (DFF) are the key interlocutors studied, and CIFOR’s applied research activities in Indonesian Borneo and the landscape of international aid-related forestry institutions are the contexts within which they are examined. With respect to CIFOR, I investigate in one analytical frame (1) project plans and intentions, (2) the context within which activities take place and the relationships between the different actors, and (3) how the difference between plan and outcome is addressed to a broader public. I show that although activities do not proceed as planned, CIFOR’s reporting and publishing of unintended outcomes incorporates this unraveling into an authoritative narrative of prescriptions for CIFOR’s interpretive community. Essential to legitimizing and mobilizing support for these prescriptions and CFIOR more generally is their articulation through the vehicle of self-critical reflection. I also examine the tension between order and disjuncture in the landscape of aid-related forestry institutions in Indonesia. I analyze how the order or narrative of reform agreeable to both donors and the Indonesian government was crafted and maintained by the DFF in its brokering role, while no actual progress was made on agreed upon commitments. Moreover, I investigate the structural dynamics that explain this lack of progress and the ineffectiveness of aid in Indonesia. In doing so, I reveal the disconnect between knowledge, policy and practice, as well as how these disjunctures are maintained.
Selection of ThAr lines for wavelength calibration of echelle spectra and implications for variations in the fine-structure constant
Creators: name: Murphy, Michael
name: Tzanavaris, P.
name: Webb, J. K.
name: Lovis, C.
Publisher: name: Swinburne
Year: 2024

description: Echelle spectrographs currently provide some of the most precise and detailed spectra in astronomy, the interpretation of which sometimes depends on the wavelength calibration accuracy. In some applications, such as constraining cosmological variations in the fundamental constants from quasar absorption lines, the wavelength calibration is crucial. Here we detail an algorithm for selecting thorium-argon (ThAr) emission lines for wavelength calibration which incorporates the properties of both a new laboratory wavelength list and the spectrograph of interest. We apply the algorithm to the Very Large Telescope Ultraviolet and Visual Echelle Spectrograph (UVES) and demonstrate a factor of greater than or similar to 3 improvement in the wavelength calibration residuals (i.e. random errors) alone. It is also found that UVES spectra calibrated using a previous, widely distributed line-list contain systematic +/- 30 -75 m s(-1) distortions of the wavelength scale over both short and long wavelength ranges. These distortions have important implications for current UVES constraints on cosmological variations in the fine-structure constant. The induced systematic errors are most severe for Mg/FeII quasar absorbers in the redshift range 1.2 less than or similar to z(abs) less than or similar to 2.3, with individual absorbers studied by recent authors containing systematic errors up to four times larger than quoted statistical errors.
УМУМИЙ ЎРТА ТАЪЛИМ МАКТАБЛАРИДА ЎҚУВ ФАНЛАРИГА ҚЎЛЛАНИЛАДИГАН ГРАФИК ТАСВИР ТУРЛАРИ
Creators: name: Masharipov, Abdurahmon
name: Masharipova, Mahliyo
Publisher: name: Zenodo
Year: 2024

description: Таълимнинг  дидактик  принциплари  тизимида  кўргазмалилик  таълим сифатини  таъминлашнинг  асосий  воситаларидан  бири  саналади.  Шунинг учун  ҳам  ҳар  бир  фан  ўқитувчиси  ўзининг  педагогик  фаолиятида  таълим сифати ва самарадорлигини оширишнинг муҳим омилларидан бири сифатида кўргазмали  воситаларидан  фойдаланади.  Дарсга  олиб  кириладиган кўргазмали  воситалар,  буюмлар,  плакатлар,  турли  тасвирлар,  харита  ва схемалар таълимнинг дидактик имкониятларини оширади ҳамда ўқувчиларга дарс мавзусини тўлароқ англаши  учун қулай муҳитни юзага келтиради. Зеро, кўргазмали  воситалар  ўқувчиларга  берилаётган  ўқув  материалини  тушуниб олишга  ёрдам  беради,  ўқитувчига  эса  шу  материални  тушунтиришни енгиллаштиради.
The connection between metallicity and metal-line kinematics in (sub-)damped Lyα systems
Creators: name: Murphy, Michael
name: Curran, S. J.
name: Webb, J. K.
name: Ménager, H.
name: Zych, B. J.
Publisher: name: Swinburne
Year: 2024

description: A correlation between the metallicity, [M/H], and rest-frame MgII equivalent width, Wλ2796r, is found from 49 damped Lyα absorbers (DLAs) and strong sub-DLAs drawn from the literature over the redshift range 0.2 < zabs < 2.6. The correlation is significant at 4.2σ and improves to 4.7σ when the mild evolution of [M/H] with redshift is taken into account. Even when including only the 26 DLAs (i.e. excluding sub-DLAs) which have Zn-metallicities and Wλ2796r > 0.7Å, the correlation remains at >3σ significance. Since the MgII λ2796 transition is predominantly saturated in DLAs (which always have Wλ2796r greater than 0.3Å), Wλ2796r is far more sensitive to the kinematic spread of the metal velocity components across the absorption profile than it is to [M/H]. Thus, the observed [M/H]-Wλ2796r correlation points to a strong link between the absorber metallicity and the mechanism for producing and dispersing the velocity components. We also note that approximately half of the 13 known H2 absorbers have very high Wλ2796r and very broad velocity structures which show characteristics usually associated with outflows. Follow-up ultraviolet- and blue-sensitive high-resolution spectra of high-Wλ2796r systems, initially identified in low-resolution spectra, may therefore yield a large number of new H2 discoveries.
Probing variations in fundamental constants with radio and optical quasar absorption-line observations
Creators: name: Tzanavaris, P.
name: Murphy, Michael
name: Webb, J. K.
name: Flambaum, V. V.
name: Curran, S. J.
Publisher: name: Swinburne
Year: 2024

description: Nine quasar absorption spectra at 21-cm and ultraviolet (UV) rest-frame wavelengths are used to estimate possible variations in x equivalent to alpha(2)g(p)mu, where alpha is the fine structure constant, g(p) the proton g-factor and mu equivalent to m(e)/m(p) is the electron-to-proton mass ratio. We find (weighted)(total) = (0.63 +/- 0.99) x 10(-5) over a redshift range 0.23 less than or similar to z(abs) less than or similar to 2.35 which corresponds to look-back times of 2.7-10.5 billion years. A linear fit against look-back time, tied to Delta x/x = 0 at z = 0, gives a best-fitting rate of change of (x)over dot/x = (-.06 +/- 1.2) x 10(-15) yr(-2). We find no evidence for strong angular variations in x across the sky. Our sample is much larger than most previous samples and demonstrates that intrinsic line-of-sight velocity differences between the 21-cm and UV absorption redshifts, which have a random sign and magnitude in each absorption system, limit our precision. The data directly imply that the average magnitude of this difference is Delta v(los) similar to 6 km s(-1). Combining our Delta x/x measurement with absorption-line constraints on alpha-variation yields strong limits on the variation of mu. Our most conservative estimate, obtained by assuming no variations in alpha or g(p) is simply Delta mu/mu = (weighted)(total). If we use only the four high-redshift absorbers in our sample, we obtain Delta mu/mu = (0.58 +/- 1.95) x 10(-5), which agrees (2 sigma) with recent, more direct estimates from two absorption systems containing molecular hydrogen, also at high redshift, and which have hinted at a possible mu-variation, Delta mu/mu = (-2.0 +/- 0.6) x 10(-5). Our method of constraining Delta mu/mu is completely independent from the molecular hydrogen observations. If we include the low-redshift systems, our Delta mu/mu result differs significantly from the high-redshift molecular hydrogen results. We detect a dipole variation in mu across the sky, but given the sparse angular distribution of quasar sight lines we find that this model is required by the data at only the 88 per cent confidence level. Clearly, much larger samples of 21-cm and molecular hydrogen absorbers are required to adequately resolve the issue of the variation of mu and x.
A Constraint Analysis of Tomato Cultivators in Khawzawl Cluster, Mizoram
Creators: name: Laldingngheti*
name: Dr. Kumud Das
Publisher: name: Zenodo
Year: 2024
Subjects: Tomato cultivation, Garrett Ranking Method, Agricultural constraints, Mizoram farming challenges.

description: Abstract: This study examines the major challenges faced by tomato cultivators in the Khawzawl cluster of Mizoram, categorizing these constraints into four primary areas: technical, labor and economic, marketing, and agro-biological. By utilizing the Garrett Ranking Method, the research quantifies and ranks the severity of each constraint as perceived by farmers, offering a systematic understanding of the key obstacles to productivity and profitability. Findings reveal that technical challenges, particularly limited ICT literacy and inadequate processing infrastructure, significantly hinder efficiency. Economic constraints, such as limited access to finance, crop insurance, and high labor costs, exacerbate the financial vulnerability of farmers. Marketing constraints, including price volatility, exploitation by middlemen, and inadequate storage facilities, further reduce profitability and market stability for tomato cultivators. Agro-biological issues, such as erratic rainfall, pest infestations, and soil fertility, adversely affect crop yield and quality.

The study emphasizes the need for targeted interventions to address these constraints, recommending measures such as digital literacy programs, infrastructure investment, cooperative marketing systems, and improved pest management practices. By prioritizing these constraints according to their impact, this research provides valuable insights for policymakers and agricultural stakeholders, suggesting strategic actions to foster a more resilient, productive, and sustainable tomato farming sector in the region. These findings serve as a foundation for future efforts to improve agricultural practices, enhance economic stability, and support rural livelihoods in Mizoram.
A study of methods for including uncertainty in Seismic PSA
Creators: name: Raganelli, Lavinia
Publisher: name: Imperial College London
Year: 2018

description: This thesis reviews current methodologies for conducting seismic Probabilistic Risk Assessment (PSA) for nuclear power plants, focussing on methods allowing for uncer- tainties in PSA input data. The techniques used to characterise earthquake ground motion and component failure probabilities (fragilities) and their uncertainties are described, and the methods used to include this data in PSA models are explained. The thesis shows that use of a classical Monte Carlo technique for including data uncertainties in seismic PSA involves statistical combination of results from multiple executions of the PSA model with different input data values. The chief difficulty in the Monte Carlo method arises because the conditional probability of failure of plant components depends on the ground motion associated with the seismic event which is itself subject to significant uncertainties, particularly for rare seismic events. To overcome some of these difficulties, this thesis develops a simplified Monte Carlo method for including uncertainties in seismic PSA. The new method uses properties of log-normal distributions to combine uncertainties in seismic ground motion and component fragilities, avoiding the multiple Monte Carlo calculations of the ’ex- act’ Monte Carlo method. Errors due to dependencies introduced by following the simplified approach are estimated and judged to be acceptable for typical PSAs. The new method is applied to a simplified seismic PSA model previously developed for a PWR type reactor. Results obtained with the simplified method are compared with those obtained with the ’exact’ Monte Carlo approach and with those obtained when data uncertainties are ignored completely. The comparison confirms that the approximate Monte Carlo method gives estimates of core melt frequency that are comparable to those found the ’exact’ Monte Carlo method. However, the mean core melt frequency estimated using both Monte Carlo methods is about four times higher than that obtained ignoring uncertainties, showing the importance of taking account of data uncertainties when carrying out seismic PSAs for nuclear power plants.
Cluster Analysis in Reservoir Characterization
Creators: name: Muneta, Yasuhiro
Publisher: name: The University of Texas at Austin
Year: 1994
Subjects: Permeability
Reservoir characterization

description: Any raw data sampled in an oil field has a certain amount of noise; the sample may be called an obscure image of the real thing. We may eliminate the noise by a process of "image enhancement" in "statistical pattern recognition." Image enhancement is one of the important steps in processing large data sets to make them more suitable for classification than were the original data. In this work, cluster analysis, which is a method of image enhancement, is applied to some reservoir characterization problems such as permeability distributions of core samples, sand/shale sequences observed in wells, and pressure distributions in heterogeneous porous media to classify the sample data and find the intrinsic patterns (averaged images) from the original data sets. Cluster analysis is a multivariate statistical method. It is very general and can be applied to a wide area of scientific investigations. It is often called a tool of discovery or an unsupervised approach which doesn't depend on a priori information. It searches unknown-significant categories (patterns) themselves. Once we obtain typical patterns, we may analogously approach the real thing based on them. We find that cluster analysis is applicable to finding appropriate parent populations of a permeability distribution, theoretical indicator variograms of sand/shale sequences, and trends of effective permeability distribution.
A Study of Residual Oil Saturation in Heterogeneous Sandstone Experiments
Creators: name: Lu, Yunshan
Publisher: name: The University of Texas at Austin
Year: 1994
Subjects: Porous media
Sandstone

description: The mechanism of overall residual oil saturation reduction by polymerflood in heterogeneous porous media is studied. A compositional chemical flooding simulator (UTCHEM) using high resolution numerical method was used to simulate the previous coreflooding experiments as well as to study the sensitivity of different parameters -heterogeneity, capillary pressure, mobility ratio, etc., to the oil recovery and residual oil saturation. To provide the important data for the numerical simulation, a porous plate experiment was conducted to construct capillary pressure curves from the capillary pressure measurement data of the target porous media -Antolini sandstone outcrops. A capillary pressure measurement device was designed and made capable of desaturating four sandstone samples simultaneously with the realistic reservoir fluids and reservoir temperature. The study showed that polymerflood reduces the overall residual oil saturation in heterogeneous porous media by mitigating the negative impact of heterogeneity present in the media.
Meeting media needs: what you learn when you ask your students questions
Creators: name: Cokley, John
Publisher: name: Swinburne
Year: 2024

description: Many Western journalism educators, especially those working in convergent media, conduct workshops for their colleagues in developing countries. Nongovernment organizations (in my case the Malaysia-based Asia-Pacific Institute for Broadcasting Development, AIBD) hire us to pass on outside knowledge to locals so that media routines and coverage can be improved.
Acoustic Monitoring of Blast Fishing: Pilot Study - Dar es Salaam
Creators: name: Cagua, Edgar Fernando
name: Basset, Christopher
name: Kayanda, Robert
name: Rubens, Jason
Publisher: name: figshare
Year: 2014
Subjects: Marine Biology

description: Technical report: WWF Tanzania Country Office - Marine Programme Blast fishing is illegal fishing method according to Fisheries Act (2003) due to its negative impact especially on coral reefs. The method is widely used and it is a serious problem along the coast of Tanzania mainland. The most affected area is Dar es Salaam, where existing regulations are not effectively enforced to address the problem. Inadequate data on the frequency of occurrence and distribution of blast activity prevent effective control measures. Using Digital Spectrogram Long-Term Acoustic Recorders (DSG), we performed two deployments. One was a two-day long deployment to identify the acoustic characteristics of blasts, and the second was a two- month long deployment to monitor blast activity off Dar es Salaam coast. In the blast identification phase we deployed one DSG over two days on Milliards Bank recording sound at 80 kHz, we analysed the acoustic characteristics of 45 underwater explosions to identify and characterize blasts used during illegal fishing operations. We developed a neural- network that semi-automatically identifies explosion-like recordings. Ninety-five percent of the explosion-like events identified by the neural network are attributable to blast fishing, while the other five percent were other unidentified transient signals. During the monitoring phase two DSGs were deployed, however we were able to retrieve only one of them. Weather, currents, and possibly vandalism might be the causes for the loss. The retrieved DSG was deployed on Mbudya patches between 15 April and 30 May, 2014 recording at a sampling frequency of 40kHz during five minutes every ten minutes between 0600 and 1800 hrs. Using this additional data the neural network improved its classification accuracy to 98%. We estimate an average of 19 blasts per day during daytime off Mbudya, with most of the blasts occurring in the morning before 1300 hrs. To avoid further loss of instruments, we recommend the use of acoustic releases in further deployments. However care must be taken to avoid potential problems caused by biofouling as well as preventing interference from noise near the DSGs caused by floats and moving elements part of the release. In order to better understand blast fishing patterns as well as factors influencing underwater noise production we also recommend recording environmental variables related to weather and currents. This work represents the first steps of a potential future monitoring program off the Tanzanian coast. We provide methods and recommendations for future monitoring of blast fishing
New perspectives on strong z ≃ 0.5 Mg II absorbers: Are halo mass and equivalent width anticorrelated?
Creators: name: Bouché, Nicolas
name: Murphy, Michael
name: Péroux, Céline
name: Csabai, István
name: Wild, Vivienne
Publisher: name: Swinburne
Year: 2024

description: We measure the mean halo mass of z ≃ 0.5 Mg II absorbers using the cross-correlation (over comoving scales 0.05-13 h-1 Mpc) between 1806 Mg II quasar absorption systems and ∼250 000 luminous red galaxies (LRGs), both selected from the Sloan Digital Sky Survey Data Release 3. The Mg II systems have λ2796 rest-frame equivalent widths Wrλ2796 ≳ 0.3 Å. From the ratio of the Mg II-LRG cross-correlation to the LRG-LRG auto-correlation, we find that the bias ratio between Mg II absorbers and LRGs is b̄Mg II/b̄ LRG = 0.65 ± 0.08, which implies that the absorber host galaxies have a mean halo mass ∼20-40 times smaller than that of the LRGs; the Mg II absorbers have haloes of mean mass (log Mh(M ⊙)) = 11.94 ± 0.31 (stat)-0.25+0.24 (sys). We demonstrate that this statistical technique, which does not require any spectroscopic follow-up, does not suffer from contaminants such as stars or foreground and background galaxies. Finally, we find that the absorber halo mass is anticorrelated with the equivalent width. If Mg II absorbers were virialized in galaxy haloes, a positive Mh -Wrλ2796 correlation would have been observed since W rλ2796 is a direct measure of the velocity spread of the Mg II subcomponents. Thus, our results demonstrate that the individual clouds of a Mg II system are not virialized in the gaseous haloes of the host galaxies. We review past results in the literature on the statistics of Mg II absorbers and find that they too require a Mh, -Wrλ2796 anticorrelation. When combined with measurements of the equivalent width distribution (d2N/dz/dWr), the M h -Wrλ2796 anti-correlation naturally explains why absorbers with Wrλ2796 ≳ 2 Å are not seen at large impact parameters. We interpret the Mh -Wrλ2796 anticorrelation within the starburst scenario where strong Mg II absorbers are produced by supemovae-driven winds.
Theoretical foundations of forming value orientation of pupils by means of school sports abroad
Creators: name: Turchyk, Irina
Publisher: name: figshare
Year: 2014
Subjects: Education

description: Purpose: to determine the theoretical basis for the formation of value orientations of pupils by means of school sports facilities abroad. Material: detailed analysis of 14 published sources. Results: found that in a foreign academic and journalistic literature dominates positive appreciation of cultural values of humanistic school sports in the formation of value orientations of pupils. Found that school sport abroad plays an important role not only as a means of forming the basic values – health, but also an important area of communication, the manifestations of social activity. As well as physical and mental form of organization and leisure facilities, excellent vehicle impacts on other values of human life: the authority and position in society, work, the structure of moral and volitional characteristics, aesthetic ideals and other value orientations. Conclusions: confirmed that the global experience of formation values pupil means school sports deserves attention and requires selective introduction into the domestic education system.
Numerical Simulation of Interwell Heterogeneity in Carbonate Reservoirs Based on an Outcrop Study
Creators: name: Mishra, Anil Kumar
Publisher: name: The University of Texas at Austin
Year: 1993
Subjects: Heterogeneity
West Texas

description: Low recovery efficiency in the carbonate resevoirs of West Texas are observed that range from 15 to 45%. The restricted platform type of depositional system contains a major portion of the unrecovered mobile oil in the Permian Basin. The primary goals are (1) to study the effect of the lateral heterogeneities on the displacement mechanism of waterfloods and (2) to locate areas of unswept oil in these reservoirs. The lateral variations of the geologic facies are based on outcrop mapping. The present study focuses on the Irabarne Tank outcrop which represents the outer-ramp portion of the platform having a clinoform architecture. This outcrop is selected because it is analogous to the producing San Andres reservoirs in the area whose performance is being studied in terms of the outcrop model. A simulation model is used to study the recovery efficiency of waterfloods for outer-ramp depositional systems. The flow model incorporates a detailed description of the lateral heterogeneities in terms of the continuity of the different rock facies. This will provide an understanding of the recovery mechanism in the subsurface reservoirs to which the Irabarne Tank is considered to be analogous. Recovery efficiency is found to depend on such factors as the presence or absence of vertical permeability, capillary pressure (in some instances) and the shape of the relative permeability curves. The continuity of the high permeability layers between the injector and the producer is identified to be an important factor in recovery efficiency. The continuity of the high permeability layers increases as the inter-well distance is reduced and results in lower recovery of the uncontacted mobile oil. The detailed Irabarne Tank model is validated by using a simple three-layer model. A simple three-layer model incorporating a high permeability layer within a low permeability zone is used to study the effect of cross flow caused by viscous, capillary and buoyancy forces. In the absence of capillary forces, the recovery efficiency depends strongly on the continuity of the high permeability layer. This has been observed for both favourable and unfavourable mobility ratios . . The simple model is also used to study the sensitivity of the recovery efficiency to the placement of the infill well and the completion methods. The unrecovered mobile oil is located in the low permeability zones adjacent to the high permeability layer. An infill well selectively completed in low permeability zones recovers a percentage of the unswept oil. The percentage recovered depends on the injection pattern and the location of the infill well with reference to the original injector and producer. After approximately 2 P. V., the recovery without and with infill drilling is the same. Infill drilling therefore accelerates recovery of the uncontacted mobile oil.
A survey for redshifted molecular and atomic absorption lines - I. The Parkes half-Jansky flat-spectrum red quasar sample
Creators: name: Curran, S. J.
name: Whiting, M. T.
name: Murphy, Michael
name: Webb, J. K.
name: Longmore, S. N.
name: Pihlström, Y. M.
name: Athreya, R.
name: Blake, Chris
Publisher: name: Swinburne
Year: 2024

description: We are currently undertaking a large survey for redshifted atomic and molecular absorption lines at radio frequencies. In this paper, we present the results from the first phase of this survey: the search for HI 21-cm and OH 18-cm absorption lines in the hosts of reddened quasars and radio galaxies. Although we observed each source for up to several hours with two of the world's most sensitive radio telescopes, the Giant Metrewave Radio Telescope (GMRT) and Westerbork Synthesis Radio Telescope (WSRT), only one clear and one tentative detection were obtained: HI absorption at z = 0.097 in PKS 1555-140 and OH absorption at z = 0.126 in PKS 2300-189, respectively, with the Australia Telescope Compact Array (ATCA). For the latter, no HI absorption was detected at the same redshift as the borderline OH detection. In order to determine why no clear molecular absorption was detected in any of the 13 sources searched, we investigate the properties of the five redshifted systems currently known to exhibit OH absorption. In four of these, molecules were first detected via millimetre-wave transitions, and the flat radio spectra indicate compact background continuum sources, which may suggest a high degree of coverage of the background source by the molecular clouds in the absorber. Furthermore, for these systems we find a relationship between the molecular line strength and red optical-near-infrared (V - K) colours, thus supporting the notion that the reddening of these sources is due to dust, which provides an environment conducive to the formation of molecules. Upon comparison with the V - K colours of our sample, this relationship suggests that, presuming the reddening occurs at the host galaxy redshift at least in some of the targets, many of our observations still fall short of the sensitivity required to detect OH absorption, although a confirmation of the 'detection' of OH in 2300-189 could contravene this.
Are strong z ≃ 0.5 MgII absorbers the signature of super-winds?
Creators: name: Bouché, N.
name: Murphy, Michael
name: Péroux, C.
name: Csabai, I.
name: Wild, V.
Publisher: name: Swinburne
Year: 2024

description: BACKGROUND: In the process of galaxy formation, super-nova driven feedback from low-mass galaxies is the process that most readily account for the galaxy mass-metallicity relation and for the shallower galaxy luminosity function (LF) compared to the halo mass function. Absorption-selected galaxies are prime candidates for the sites of starburst activity as (1) they probe the gaseous halos of galaxies up to ∼50 kpc (Steidel 1995), and (2) galaxies on the faint end of the LF are likely dominating the statistics. Galaxies selected via their MgII 2796/2803 doublet absorption against background QSOs are especially well suited as Mg is produced by type II supernova. GOAL: Our project was to constrain the physical models of the gaseous halos by measuring the dark matter halo-mass (Mh) of the MgII host-galaxies statistically, i.e. without identifying spectroscopically the host-galaxy. METHOD: We have used the cross-correlation w(r) (over co-moving scales r:0.0513h1Mpc) between our sample of 1800 z 0.5 MgII absorbers with equivalent w width W2796r0.3 , and 250,000 Luminous Red Galaxies (LRGs), both selected from SDSS/DR3. The cross-correlation relies on the LRG photometric redshifts, but is not affected from contaminants such as stars or foreground and background galaxies as shown theoretically in Bouch et al. 2005 and empirically in Bouch et al. 2006. RESULTS: From the cross-correlation analysis, we found (Bouch et al. 2006) (i) that the absorber host-halo mean mass is log Mh (M) = 11.94 0.31(stat) +0.240.25(sys), i.e. about 1/2 L*, and (ii) an anti-correlation between halo mass Mh and equivalent width W2796r. INTERPRETATION: One SDSS MgII absorber (system) is made of several sub-components or clouds and the stronger the equivalent with of the absorber, the more clouds per system spread over a larger velocity range (v). This follows since each sub-component has a velocity width of ∼ 5 kms s1 (Churchill 1997). As result, the equivalent width W2796r is a measure of velocity width (v) as demonstrated by Ellison 2006. Together with our SDSS results, these relations imply a massvelocity Mhv anti-correlation. If the clouds in the host-halos were virialized, velocity and mass would have been correlated. CONCLUSION: Therefore, our Mhv anti-correlation shows that the clouds are not virialized in the gaseous halos of the hosts. This conclusion is best understood in the context of starburst driven outflows where the velocity v is related to bulk motion. This opens the possibility to study M82-analogs up to z ∼ 2.0 using the MgII selection. © 2007 International Astronomical Union.
Theory for Hydration Forces in Thin Films of Aqueous Electrolytes
Creators: name: Basu, Subhayu
Publisher: name: The University of Texas at Austin
Year: 1993
Subjects: Thin film
Electrolyte

description: A theory is presented to quantify the electrostatic forces in thin aqueous electrolyte films between two charge regulating surfaces. The Poisson-Boltzmann equation (PBE) is modified to include the effects of dielectric saturation of the double layer and the corresponding change in hydration free energy of ions. The results obtained agree remarkably well with the experimental data of Pashley (1981) and Israelachvili et. al. (1978) at low electrolyte concentration and pH. At higher concentration and pH, the model provides qualitative agreement with experimental observations. Finite ion sizes needs to be incorporated into the PBE to obtain quantitative agreement with experimental data in the high ion concentration range. The reduction in dielectric constant with increasing electric field increases the hydration energy of the ions in the double layer, giving rise to a repulsive hydration force. It is concluded that dielectric saturation of the double layer near a charged interface plays an important role in the electrostatic interactions in thin electrolyte films.
A Numerical Study of Transverse Dispersion Characteristics
Creators: name: Purandare, Kapil Yashavant
Publisher: name: The University of Texas at Austin
Year: 1992
Subjects: Transverse Dispersion
Chemical flooding
Dispersivity
Homogeneous reservoir

description: The primary objective of this project is to perform a fundamental study to characterize transverse dispersion (mixing in the vertical direction), and the various factors affecting it. We use the UTCHEM simulator, which is a three-dimensional chemical flooding simulator, to design a reservoir model to study this phenomenon. We design a reservoir grid and inject fluid uniformly across the entire inlet face of the reservoir, with a tracer of unit concentration being injected only in the lower half. The reservoir is completely saturated with water, and the fluid is produced uniformly across its entire outlet face. The homogeneous reservoir run with an input transverse dispersivity examines the characteristics of transverse dispersion. We use the Dykstra-Parsons coefficient ( Vop) as a measure of heterogeneity in the generation of random permeability fields by the turning bands method (TBM). We also study the effects of spatial correlation and aspect ratio on transverse dispersion. We discuss the vertical equilibrium (VE) condition in detail, and carry out a rigorous analytical classification on communicating layers by considering simple two-permeability cells. The simulation results indicate the difficulty of modeling transverse dispersion using single realizations. Dispersion-like behavior is achieved only by averaging multiple realizations. The numerical results indicate an increase in transverse dispersion with increasing Vop and aspect ratio. The analytical classification confirms these results.
Interference of psychomotor and spatio-temporal parameters on the efficiency of motor actions involved in the eastern species physical culture
Creators: name: Yong, Qiang Liu
Publisher: name: figshare
Year: 2014
Subjects: Education

description: Purpose: to identify interferences psychomotor abilities for consistency in the management of spatio-temporal parameters of procedural and final precision in the movements with complex motor structure. Material: the study involved 30 people occupying the eastern species physical culture (Wushu Qigong and Tai Chi Chuan). Results: It was found that the identified trusted connection as positive (n = 59, r = 0.63 to 0.92) and negative (n = 21, r = from -0.63 to -0.89) confirm the influence of particular classes in the eastern system ability to coordinated control movements of different coordination complexity. Conclusions: the ability to control the internal forces, the ability to focus, alertness and mind control depend on three complementary levels - substance "Jing", "Qi" and "Shen", which directly affect the state of psychomotor sphere and target accuracy of spatio-temporal motion parameters.
Rational organization of training a group of physical rehabilitation on the initial stage of training in universities
Creators: name: Marakushyn, Andrey
name: Piddubnyi, A.G.
name: Tsymbalyuk, Z.A.
Publisher: name: figshare
Year: 2014
Subjects: Education

description: Purpose: to justify a rational approach to organization of group sessions of physical rehabilitation at the initial stage of training in universities. Material: 217 students of groups of physical rehabilitation KhNEU named Simeon Kuznets were involved in the experiment. Results: the organizational difficulties of physical education classes in groups of physical rehabilitation at the beginning of the school year were examined. An effective way of determination of the level of students’ functional state was identified. The effectiveness of the formation of groups of physical rehabilitation at the initial stage of training was experimentally verified on base on the definition of students’ functional state and the content of this stage of training was determined. A reduction of the level of students’ functional state of physical rehabilitation groups at the beginning of studying (I semester) was stated. Conclusions: the proposed changes in the organization of students with disabilities in health status in the group by the level of functional status and the content of studying allowing students to preserve the functionality of the initial stage of studying.
Publier en Open Access sans frais grâce aux accords de l'UNIGE, en 15 minutes
Creators: name: Muller, Floriane
name: Santos, Anouk
Publisher: name: Zenodo
Year: 2023
Subjects: Open Access
frais de publication (APC)
accords Read&Publish
publication scientifique
Open Science

description: Présentation utilisée lors des rendez-vous de l'information scientifique en 15 minutes organisés par la Bibliothèque de l'Université de Genève et consacrés aux accords Read&Publish avec les maisons d'éditions de publications scientifiques. La présentation a été donnée pour la première fois dans le cadre de l'Open Access Week 2022, et a été proposée plusieurs fois depuis, avec de petites mises à jour sur les diapositives.
Objectif : Découvrir les accords permettant aux auteur-es UNIGE de publier leurs recherches en Open Access sans frais ou à moindre coût, ainsi que leurs conditions d'application.
Programme/Contenus :

Présenter l'évolution de la publication scientifique avec l'émergence de nouveaux types d'accords avec les éditeurs
Identifier les enjeux des négociations nationales
Localiser les informations sur les accords et les conditions applicables pour la prise en charge (complète ou partielle) des frais.
Accurate laboratory ultraviolet wavelengths for quasar absorption-line constraints on varying fundamental constants
Creators: name: Aldenius, M.
name: Johansson, S.
name: Murphy, Michael
Publisher: name: Swinburne
Year: 2024

description: The most precise method of investigating possible space–time variations of the fine-structure constant, α≡ (1/ħc)(e2/4πε0) , using high-redshift quasar absorption lines is the many-multiplet (MM) method. For reliable results this method requires very accurate relative laboratory wavelengths for a number of UV resonance transitions from several different ionic species. For this purpose laboratory wavelengths and wavenumbers of 23 UV lines from Mg i, Mg ii, Ti ii, Cr ii, Mn ii, Fe ii and Zn ii have been measured using high-resolution Fourier transform (FT) spectrometry. The spectra of the different ions (except for one Fe ii line, one Mg i line and the Ti ii lines) are all measured simultaneously in the same FT spectrometry recording by using a composite hollow cathode as a light source. This decreases the relative uncertainties of all the wavelengths. In addition to any measurement uncertainty, the wavelength uncertainty is determined by that of the Ar ii calibration lines, by possible pressure shifts and by illumination effects. The absolute wavenumbers have uncertainties of typically ±0.001–±0.002 cm−1 ( Δλ≈ 0.06–0.1 mÅ at 2500 Å), while the relative wavenumbers for strong, symmetric lines in the same spectral recording have uncertainties of ± 0.0005 cm−1 ( Δλ≈ 0.03 mÅ at 2500 Å) or better, depending mostly on uncertainties in the line-fitting procedure. This high relative precision greatly reduces the potential for systematic effects in the MM method, while the new Ti ii measurements now allow these transitions to be used in MM analyses.
Publier en Open Access sans frais grâce aux accords de l'UNIGE, en 15 minutes
Creators: name: Muller, Floriane
name: Santos, Anouk
Publisher: name: Université de Genève
Year: 2024
Subjects: Open Access
frais de publication (APC)
accords Read&Publish
publication scientifique
Open Science

description: Présentation utilisée lors des rendez-vous de l'information scientifique en 15 minutes organisés par la Bibliothèque de l'Université de Genève et consacrés aux accords Read&Publish avec les maisons d'éditions de publications scientifiques. La présentation a été donnée pour la première fois dans le cadre de l'Open Access Week 2022, et a été proposée plusieurs fois depuis, avec de petites mises à jour sur les diapositives en fonction notamment de l'évolution des accords signés par la Bibliothèque de l'UNIGE.

Objectif : Découvrir les accords permettant aux auteur-es UNIGE de publier leurs recherches en Open Access sans frais ou à moindre coût, ainsi que leurs conditions d'application.

Programme/Contenus :

Présenter l'évolution de la publication scientifique avec l'émergence de nouveaux types d'accords avec les éditeurs

Identifier les enjeux des négociations nationales

Localiser les informations sur les accords et les conditions applicables pour la prise en charge (complète ou partielle) des frais.
Main modern problems of doping in sport
Creators: name: Rudenko, Viktor
Publisher: name: figshare
Year: 2014
Subjects: Education

description: Purpose: to identify and substantiate medico-biological, psychological and social problems of doping in sport. Material: Theoretical study is based on analysis of more than 50 scientific and methodical literatures. Results: it was shown that doping is one of the serious problems of modern sport and society in general. Defines important questions regarding anti-doping rules and the anti-doping control in sport. Installed the use of performance enhancing drugs in professional sports for children and youth. Given the promising solutions to the problems of doping in Ukraine. Conclusions: Among the problems of modern sport is becoming increasingly important issue of doping. It is an extremely complex because it involves the interrelated medical, legal, political, moral, organizational, social and pedagogical aspects. Socio-pedagogical factors of anti-doping policy in sports scientists comprehensively still not addressed. Certain aspects of anti-doping policy presented in scientific papers, which can be divided into two groups. The first group of papers is devoted to doping in sport as a social event. The second group of papers devoted to the problems of doping control. Today there is a need and objective preconditions for the development and adoption of a General concept, which would be generalized numerical amount of data received and served as a basis for developing an effective anti-doping control at the expense of improvement of legislative and normative-legal base and infrastructure of the anti-doping policy in Ukraine, which should be brought in line with modern international standards.
title: Damage-assessment on the building of international law: After the Italian Constitutional Court’s decision no. 238 of 2014: no structural damage, just wear and tear
Creators: name: Fontanelli, Filippo
Publisher: name: Fachinformationsdienst für internationale und interdisziplinäre Rechtsforschung
Year: 2014
Subjects: subject: 341

description: Völkerrechtsblog