cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Intersubband transition engineering in the conduction band of asymmetric coupled Ge/SiGe quantum wells
Creators: name: Persichetti, Luca
name: Montanari, Michele
name: Ciano, Chiara
name: Di Gaspare, Luciana
name: Ortolani, Michele
name: Baldassarre, Leonetta
name: Zoellner, Marvin H.
name: Mukherjee, Samik
name: Moutanabbir, Oussama
name: Capellini, Giovanni
name: Virgilio, Michele
name: De Seta, Monica
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: : n-type Ge/SiGe asymmetric-coupled quantum wells represent the building block of a variety of nanoscale quantum devices, including recently proposed designs for a silicon-based THz quantum cascade laser. In this paper, we combine structural and spectroscopic experiments on 20-module superstructures, each featuring two Ge wells coupled through a Ge-rich tunnel barrier, as a function of the geometry parameters of the design and the P dopant concentration. Through the comparison of THz spectroscopic data with numerical calculations of intersubband optical absorption resonances, we demonstrated that it is possible to tune by design the energy and the spatial overlap of quantum confined subbands in the conduction band of the heterostructures. The high structural/interface quality of the samples and the control achieved on subband hybridization are the promising starting point towards a working electrically pumped light-emitting device.
Towards a sustainable UBC Food System : part II : indicators of sustainability
Creators: name: Chen, Cindy
name: Funk, Nathan
name: Kiehlbauch, Laura
name: Lawhead, Veronica
name: Manaois, Andrealynn
name: Pearce, Sarah
name: Strutynski, Niki
name: Yong, Cecilia
Publisher: name: The University of British Columbia
Year: 2014

description: As fourth year students in the Faculty of Agriculture’s Land, Food, and Community series, we have witnessed the growing popularity of the term “sustainability” at the University of British Columbia (UBC). In our classes and as a part of the general student population we have seen how the use of this word has been expanded beyond rhetoric in action toward a more sustainable campus, whether in courses that facilitate student involvement in actual sustainability projects or in the introduction of fair-trade coffee and reusable cup discounts at campus cafes. But as we prepare for our graduation from UBC we have been asked to question, “How do we evaluate the sustainability of the entire campus food system?” The following report is our response to this question. As a diverse group of agriculture students we discussed, researched, and compiled a paper on how to evaluate the sustainability of the UBC Food System. In addition to a map of the current UBC Food System and its components, the report includes clearly outlined indicators and recommendations for ecological, social, and economic sustainability. We have also created a simple model that illustrates the level of sustainability as would be revealed by these indicators. This was a challenging, but rewarding task. As a group we came to the conclusion that all three components of sustainability are not only critical to the whole system but also intimately interconnected with one another. While we have forged a plan for assessing the sustainability of the UBC Food System, we are glad to know that future classes will continue our work. This project has provided a great opportunity to work in a creative and open learning environment; more so, it has provided the opportunity to contribute to a current and important issue at UBC. While you read on, keep in mind that this report represents an early stage in the process toward a more sustainable UBC campus. 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.”
Linking Heterogeneous Climate Policies (Consistent with the Paris Agreement)
Creators: name: Mehling, Michael A.
name: Metcalf, Gilbert E.
name: Stavins, Robert N.
name: Mehling, Michael A.
name: Metcalf, Gilbert E.
name: Stavins, Robert N.
Publisher: name: Unknown
Year: 2017
Subjects: subject: Environmental Economics and Policy
subject: Climate Policy
subject: Paris Agreement
subject: Nationally Determined Contributions

description: The Paris Agreement has achieved one of two key necessary conditions for ultimate success – a broad base of participation among the countries of the world. But another key necessary condition has yet to be achieved – adequate collective ambition of the individual nationally determined contributions. How can the climate negotiators provide a structure that will include incentives to increase ambition over time? An important part of the answer can be international linkage of regional, national, and subnational policies, that is, formal recognition of emission reductions undertaken in another jurisdiction for the purpose of meeting a Party’s own mitigation objectives. A central challenge is how to facilitate such linkage in the context of the very great heterogeneity that characterizes climate policies along five dimensions – type of policy instrument; level of government jurisdiction; status of that jurisdiction under the Paris Agreement; nature of the policy instrument’s target; and the nature along several dimensions of each Party’s Nationally Determined Contribution. We consider such heterogeneity among policies, and identify which linkages of various combinations of characteristics are feasible; of these, which are most promising; and what accounting mechanisms would make the operation of respective linkages consistent with the Paris Agreement.
Ready for a Carbon Tax? An Explorative Analysis of University Students’ Preferences
Creators: name: Rotaris, Lucia
name: Rotaris, Lucia
Publisher: name: Unknown
Year: 2017
Subjects: subject: Environmental Economics and Policy
subject: Carbon Tax
subject: Willingness to Pay
subject: University Students
subject: Climate Change

description: Greenhouse gases emissions are inexorably rising worldwide and the frequency and disruptive power of extreme weather phenomena are dramatically increasing. Although command-and-control and regulation policies have been extensively used to mitigate climate change, more effective and potentially efficient policies are needed to curb the negative externalities produced by human activities. A carbon tax could make the case, but is seldom implemented due to its assumed political unpopularity. In order to estimate the acceptability and the willingness to pay (WTP) for a carbon tax, a contingent valuation experiment was administered in USA and in Italy to a sample of 150 university students. The research is innovative both for the topic chosen, since there are no studies testing the WTP for a carbon tax in the Italian context nor comparing it with the estimates obtained for other countries, and for the methodology used to estimate the WTP, making use of random parameters logit models to obtain individual specific estimates of the median WTP. The results show that the median WTP ranges between a minimum of $161 and a maximum of $242, and varies according to the purposes proposed for the tax revenue use, the respondents’ beliefs and knowledge about climate change, and some sociodemographic characteristics of the respondents (age, gender, and political affiliation). The students’ preferences seem to be quite similar when the nationality of the respondents is taken into account.
The Impact of Energy Prices on Employment and Environmental Performance: Evidence from French Manufacturing Establishments
Creators: name: Marin, Giovanni
name: Vona, Francesco
name: Marin, Giovanni
name: Vona, Francesco
Publisher: name: Unknown
Year: 2017
Subjects: subject: Resource /Energy Economics and Policy
subject: Energy Prices
subject: Establishment Performance
subject: Environmental and Energy Policy

description: This paper evaluates the historical influence of energy prices on a series of measures of environmental and economic performance for a panel of French manufacturing establishments over the period 1997-2010. The focus on energy prices is motivated by the fact that changes in environmental and energy policies have been dominated by substantial reductions in discounts for large consumers, making the evaluation of each policy in isolation exceedingly difficult. To identify price effects, we construct a shift-share instrument that captures only the exogenous variation in establishment-specific energy prices. Our results highlight a trade-off between environmental and economic goals: although a 10 percent increase in energy prices brings about a 6 percent reduction in energy consumption and an 11 percent reduction in CO2 emissions, such an increase also has a modestly negative impact on employment (-2.6 percent) and very small impact on wages and productivity. The negative employment effects are mostly concentrated in energy-intensive and trade-exposed sectors. Simulating the effect of a carbon tax, we show that job losses for the most exposed sectors can be quite large. However, these effects are upper bounds and we show that they are significantly mitigated in multi-establishment firms by labor reallocation across establishments.
Unveiling dipolar spectral regimes of large dielectric Mie spheres from helicity conservation
Creators: name: Olmos-Trigo, Jorge
name: Abujetas, Diego R.
name: Sanz-Fernández, Cristina
name: de Sousa, Nuno
name: Sánchez-Gil, José A.
name: Sáenz, Juan José
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Controlling the electromagnetic helicity and directionality of the light scattered by dielectric particles is paramount to a variety of phenomenology of interest in all-dielectric optics and photonics. In this Letter, we show that the conservation of the electromagnetic helicity in the scattering by high-index dielectric Mie spheres can be used as a probe of pure-multipolar spectral regions, particularly, of dipolar nature, beyond its presumed spectral interval. This finding reveals that the dipolar behavior is not necessarily limited to small particles, in striking contrast to the current state of the art. Interestingly, we demonstrate that the optimum forward light scattering condition, predicted for a particular nano-sphere in the limit of small particle, is fulfilled in fact at a fixed x size parameter for an infinite number of refractive indexes
The Evaluation of Forecast Accuracy of a Non Statistical Method of Forecasting
Creators: name: Choong, Foong Chee
name: Snyder, Ralph D.
name: Choong, Foong Chee
name: Snyder, Ralph D.
Publisher: name: Unknown
Year: 1991
Subjects: subject: Agribusiness
subject: Research Methods/ Statistical Methods
subject: Business forecasting
subject: time series analysis

description: It is often assumed that the accuracy of formal statistical methods of forecasting is naturally superior to methods which are not based on statistical principles. Nevertheless, non statistical methods of forecasting are very widely employed in practice, especially within small businesses, because they are generally less sophisticated and easier to understand. This paper evaluates the accuracy of a simple rule of thumb that was employed by a British company in its forecasting procedure. The results are compared with the performance of statistical methods under different conditions in order to ascertain whether any improvements in forecast accuracy could be gained.
Production Efficiency Analysis between Transplanting and Direct Seeded Rice Producers in Punjab, Pakistan
Creators: name: Fatima, Hina
name: Shaheen, Sania
name: Almas, Lal
name: Vestal, Mallory
name: Haroon, Sehrish
name: Fatima, Hina
name: Shaheen, Sania
name: Almas, Lal
name: Vestal, Mallory
name: Haroon, Sehrish
Publisher: name: Unknown
Year: 2018
Subjects: subject: Crop Production/Industries
subject: DSR: Direct Seeded Rice,
subject: TPR: Transplanting rice,
subject: SFA: Stochastic Frontier Analysis,
subject: MLE: Maximum Likelihood Estimates.

description: Rice is known as an Asian crop because 90% of global rice production and consumption takes place in Asia. It is the staple food for about 50% of the world population and 75% of the people living in developing countries. Pakistan is the 11th rice producer in the world and 5th largest exporter. Comparative economic efficiency of Transplanted (TRP) and Direct Seeded (DRS) rice production in Pakistan needs evaluation. This study analyzed the economic efficiency of TRP) and DRS producers in rice producing districts of Punjab. Primary data was collected from major rice producing areas of Punjab, Pakistan and Stochastic Frontier Analysis (SFA) was run in order to estimate the profit efficiency of rice producers. The results revealed that on average profit efficiency of TRP rice farmers and DRS farmers was 57% and 83%, respectively. Hence, there are opportunities to improve economic and technical efficiency as well as the rice production profitability through adopting improved farming practices, optimal use of inputs and production techniques. The results also demonstrated that socio-economic factors of rice producers also significantly influence the profit efficiency of rice producers. Therefore, the efficiency of rice producers can also be improved through education and enrichment of extension services in the rural areas.
La satisfacción laboral en 2019 no es la que debiera, una prueba empírica
Creators: name: Alba, Jorge
Publisher: name: figshare
Year: 2020
Subjects: subject: 150305 Human Resources Management
subject: FOS: Economics and business
subject: 80703 Human Information Behaviour
subject: FOS: Media and communications
subject: 150314 Small Business Management
subject: 150503 Marketing Management (incl. Strategy and Customer Relations)
subject: 220102 Business Ethics
subject: FOS: Philosophy, ethics and religion
subject: 220201 Business and Labour History
subject: 150308 International Business
subject: 150301 Business Information Management (incl. Records, Knowledge and Information Management, and Intelligence)

description: La satisfacción laboral cada vez debería adquirir mayor protagonismo en el mundo actual. Uno de los mayores destructores es el estrés ya que sin duda tiene consecuencias desagradables. Por ello, con el fin de analizar la satisfacción laboral en los trabajadores españoles durante el año 2019, se ha llevado a cabo la presente encuesta.
Detection of non-Gaussianity in the WMAP 1-year data using spherical wavelets
Creators: name: Vielva, P.
name: Martinez-Gonzalez, E.
name: Barreiro, R. B.
name: Sanz, J. L.
name: Cayon, L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A non-Gaussian detection in the WMAP 1-year data is reported. The detection has been found in the combined Q-V-W map proposed by the WMAP team (Komatsu et al. 2003) after applying a wavelet technique based on the Spherical Mexican Hat Wavelet (SMHW). The skewness and the kurtosis of the SMHW coefficients are calculated at different scales. A non-Gaussian signal is detected at scales of the SMHW around 4 deg (size in the sky of around 10 deg). The right tail probability of the detection is approx. 0.4%. In addition, a study of Gaussianity is performed in each hemisphere. The northern hemisphere is compatible with Gaussianity, whereas the southern one deviates from Gaussianity with a right tail probability of approx. 0.1%. Systematics, foregrounds and uncertainties in the estimation of the cosmological parameters are carefully studied in order to identify the possible source of non-Gaussianity. The detected deviation from Gaussianity is not found to be caused by systematic effects: 1) each one of the Q, V and W receivers shows the same non-Gaussianity pattern, and 2) several combinations of the different receivers at each frequency band do not show this non-Gaussian pattern. Similarly, galactic foregrounds show a negligible contribution to the non-Gaussian detection: non-Gaussianity is detected in all the WMAP maps and no frequency dependence is observed. Moreover, the expected foreground contribution to the combined WMAP map was added to CMB Gaussian simulations showing a behaviour compatible with the Gaussian model. Influence of uncertainties in the CMB power spectrum estimation are also quantified. Hence, possible intrinsic temperature fluctuations (like secondary anisotropies and primordial features) can not be rejected as the source of this non-Gaussian detection.
description: 33 pages, 14 figures. Revised to match version accepted for publication in ApJ
Formation of a fast "lane" for positional transition in a microparticle-suspended nematic liquid crystal cell
Creators: name: Xiao, Ke
name: Chen, Xi
name: Cao, Xuezheng
name: Wu, Chen-Xu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In this paper, based on the numerical calculation of total energy utilizing the Green's function method, we found that the external electric field applied to a microparticle-suspended nematic liquid crystal cell, if reaching a critical value, combined with its direction, surface anchoring feature and molecular dielectric anisotropy, is possible to create an anisotropic "bubble" around the microparticle with a vertical fast "lane", in which the microparticle can, driven by the asymmetric buoyant force, vertically move swiftly from the cell's midplane to a new equilibrium position, triggering a positional transition discovered by the author previously. Such a new equilibrium position is decided via a competition between the buoyant force and the effective force built upon the microparticle by the elastic energy gradient along the "lane". The threshold value of external field, depends on thickness $L$ and Frank elastic constant $K$ and slightly on the microparticle size and density, in a Fréedericksz-like manner, but by a factor. For a nematic liquid crystal cell with planar surface alignment, a bistable equilibrium structure for the transition is found when the direction of the applied electric field is (a) perpendicular to the two plates of the cell with positive molecular dielectric anisotropy, or (b) parallel to the two plates and the anchoring direction of the cell with negative molecular dielectric anisotropy. Except for the formation of a vertical fast "lane", when the electric field applied is parallel to both the two plates and perpendicular to the anchoring direction, the microparticle suspended in the nematic liquid crystal tends to be trapped in the midplane, regardless of the sign of the molecular dielectric anisotropy. Such phenomenon also occurs for negative molecular dielectric anisotropy while the external is applied perpendicular to the two plates.
Bouncing, chasing or pausing: asymmetric collisions of active droplets
Creators: name: Lippera, Kevin
name: Benzaquen, Michael
name: Michelin, Sebastien
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Chemically-active droplets exhibit complex avoiding trajectories. While heterogeneity is inevitable in active matter experiments, it is mostly overlooked in their modelling. Exploiting its geometric simplicity, we fully-resolve the head-on collision of two swimming droplets of different radii and demonstrate that even a small contrast in size critically conditions their collision and subsequent dynamics. We identify three fundamentally-different regimes. The resulting high sensitivity of pairwise collisions is expected to profoundly affect their collective dynamics.
description: 7 pages, 5 figures, to appear in Physical Review Fluids
Exact results relating spin-orbit interactions in two dimensional strongly correlated systems
Creators: name: Kucska, Nóra
name: Gulácsi, Zsolt
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A 2D square, two-bands, strongly correlated and non-integrable system is analysed exactly in the presence of many-body spin-orbit interactions via the method of Positive Semidefinite Operators. The deduced exact ground states in the high concentration limit are strongly entangled, and given by the spin-orbit coupling are ferromagnetic and present an enhanced carrier mobility, which substantially differs for different spin projections. The described state emerges in a restricted parameter space region, which however is clearly accessible experimentally. The exact solutions are provided via the solution of a matching system of equations containing 74 coupled, non-linear and complex algebraic equations. In our knowledge, other exact results for 2D interacting systems with spin-orbit interactions are not present in the literature.
Intraday variability of the polarization vector in AGN S5 0716+714
Creators: name: Shablovinskaya, E.
name: Afanasiev, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The bright radio source S5 0716+714, which is usually classified as a BL Lac object, is one of the most intensively studied blazar. S5 0716+714 demonstrates extremely peculiar properties, such as the shortest time-scale of optical and polarimetric variations observed in blazars. In the given talk, we present the results of 8-h polarimetric monitoring of S5 0716+714 with a $\sim70$-sec resolution carried out using the 6-m telescope BTA of the SAO RAS. The observation data analysis reveals the variability both in total and polarized light on the 1.5-hour timescales that specifies the size of the unresolved emitting region. The numerical model of polarization in jet with the helical structure of the magnetic field is suggested, and fitting the model reveals a magnetic field precession with a period of about 15 days.
description: Proceeding to the XII SCSLSA; published in CAOSP Special Issuie
Winds from Nuclear Starbursts: Old Truths and Recent Progress on Superwinds
Creators: name: Strickland, David K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I will discuss a few select aspects of the most common and best understood galactic-scale outflow -- starburst-driven superwinds, focusing on winds from nuclear starburst galaxies. I will show that modern observations, in particular in the soft and hard X-ray bands, complement and reinforce the existing paradigm of superwinds as flows collectively driven by multiple SNe. The properties of the diffuse X-ray emission from dwarf starburst galaxies, L_BOL ~ L_* starbursts in spiral galaxies, and ULIRGS, are all consistent with superwind activity. Where appropriate, I contrast the physics of starburst-driven winds with poorly collimated winds from AGN, and discuss what we know of the role of LLAGN and Seyfert nuclei in starburst superwind galaxies.
description: To appear in the proceedings of IAU symposium 222: The Interplay among Black Holes, Stars and ISM in Galactic Nuclei, held in Gramado, Brazil, March 1-5 2004. Eds. Th. Storchi Bergmann, L.C. Ho & H.R. Schmitt. 6 pages, 1 figure
title: Theorising work : investigating the employment of people with learning difficulties
Creators: name: Humber, Lee Anderson
Publisher: name: The Open University
Year: 2012

description: Paid employment for people with learning difficulties became central to social inclusion agendas over the period of Labour governments between 1997 and 2010. This found its clearest expression in Valuing Employment Now (2009) the first policy document in UK history to specifically focus on the role of employment in the lives of people with learning difficulties. This thesis tests the validity of the claims made in this and other policy documents seeking to embed the idea that employment supports social inclusion. The overarching research question addressed by the thesis is: Is employment a vehicle for social inclusion for people with learning difficulties? Using a qualitative multi-method approach, this question is explored through an analysis of how policy has informed practice over time; the extent to which young people with learning difficulties are prepared for employment; what employment means to people with learning difficulties; and how the identities associated with people with learning difficulties influence inclusion through employment. The thesis analyses relationships between structure and agency in the specific context of learning difficulties and employment. The thesis investigates how employment for people with learning difficulties has been contextualised by policy, service provision and ideologies over time. It interrogates how people with learning difficulties have interpreted this policy- provision-ideas context, and attempted to negotiate it. The thesis analyses the extent to which people with learning difficulties consider employment as an opportunity for them to become involved in a process of social inclusion. In order to support this analysis, the thesis utilises concepts drawn from sociological theory, in particular the concept of structuration (Giddens, 1990). The research found that people with learning difficulties - employed and unemployed - consider employment to have the potential for social inclusion. However, as well as numerous structural barriers research also found that a combination of policy and practice over time has constructed and maintained identity 'types' (Giddens, 1990: 118) which constrain the extent to which employment can facilitate social inclusion. Further, the research found evidence that people with learning difficulties are aware of the identities they are being invited to adopt and draw on them in contradictory ways.
The transcriptomes of cave and surface populations of Gammarus minus (Crustacea : Amphipoda) provide evidence for positive selection on cave downregulated transcripts
Creators: name: Carlini, David
name: Fong, Daniel
Publisher: name: American University
Year: 2023

description: Gammarus minus, a freshwater amphipod living in the cave and surface streams in the eastern USA, is an excellent model for investigating evolutionary adaptation to the subterranean environment. RNA-Seq was conducted on one pair of morphologically distinct sister populations inhabiting surface and cave habitats to identify genes that were differentially expressed in the two populations, as well as to compare levels and patterns of genetic variation within and between populations. Of the 104,630 transcripts identified in the transcriptome assembly, 57% had higher average levels of expression in the cave population. After Benjamini- Hochberg correction for multiple tests, 1517 and 551 transcripts were significantly upregulated or downregulated, respectively, in the cave population, indicating an almost three-fold enrichment of cave-upregulated genes. The average level of nucleotide diversity across all transcripts was significantly lower in the cave population. Within the cave population, where the average nucleotide diversity of cave-downregulated transcripts was 75% that of the cave-upregulated transcripts, a highly significant difference, whereas within the spring population the nucleotide diversities of cave-downregulated and cave-upregulated transcripts was virtually identical. Three lines of evidence suggest that the reduced variation in cave downregulated transcripts is due to positive selection in the cave population: 1) the average neutrality index of cave-downregulated genes was < 1, consistent with positive selection, and significantly less than that of cave-upregulated genes; 2) Tajima's D was positively correlated with the cave:surface expression ratio, and 3) cave-downregulated transcripts were significantly more likely to be highly diverged from their surface homologs than cave-upregulated transcripts. Five transcripts had fixed premature termination codons in the cave population. The expression patterns and sequence variation in one such transcript, encoding the DNA repair protein photolyase, were examined in more detail and provide the first evidence for the relaxation of functional constraint in this light-dependent protein in a subterranean population.
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Dynamics on Multiple Potential Energy Surfaces: Quantitative Studies of Elementary Processes Relevant to Hypersonics
Creators: name: Koner, Debasish
name: Bemish, Raymond J.
name: Meuwly, Markus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The determination of thermal and vibrational relaxation rates of triatomic systems suitable for application in hypersonic model calculations is discussed. For this, potential energy surfaces for ground and electronically excited state species need to be computed and represented with high accuracy and quasiclassical or quantum nuclear dynamics simulations provide the basis for determining the relevant rates. These include thermal reaction rates, state-to-state cross-sections, or vibrational relaxation rates. For exemplary systems - [NNO], [NOO], and [CNO] - all individual steps are described and a literature overview for them is provided. Finally, as some of these quantities involve considerable computational expense, for the example of state-to-state cross sections the construction of an efficient model based on neural networks is discussed. All such data is required and being used in more coarse-grained computational fluid dynamics simulations.
description: Review article, 46 pages, 8 figures
UBC Food System research proposal
Creators: name: Calabrese, Adriana
name: Fong, Grace
name: Isac, Gretsi
name: Smith, Keri
name: Marshall, Paris
name: Wong, Pauline
name: O, Ruby
Publisher: name: The University of British Columbia
Year: 2014

description: It is paramount for a food system to be sustainable: meet the demand of the present but not compromising the resources for future generations. Food security is a core part of a sustainable food system and should be used as an indicator to evaluate the current state of the UBC Food system. As a working team of AGSC 450, our role is to design a model to assess the sustainable state of the UBC food system, emphasizing on the lack of “food security” existing and how we achieve it through analysis of various components of the land, food, and community. We have chosen two indicators to be measured for each social, ecological, and economical perspective in the evaluation of the sustainability of the UBC food system. As such, these indicators will help to guide future AGSC students in assessing the state of sustainability of our food system and help make recommendations to strive for our proposed goal. 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.”
title: Clinical Case Report: Lingual Thyroid
Creators: name: Govender, Keshnee
Publisher: name: EURORAD
Year: 2022
Subjects: subject: Head & neck imaging
subject: Ear / Nose / Throat
subject: CT
subject: Clinical Cases

description: Clinical History: A 52-year-old female presents with an enlarging painless lump in her mouth. There is resultant dysphagia with concurrent lethargy and weight gain. Thyroid function test confirms hypothyroidism. Thyroid ultrasound fails to locate the thyroid gland in the neck. There is no history of previous thyroid surgery.

description: 52 years, female
Using VLBI to Probe the Orion-KL Outflow on AU Scales
Creators: name: Doeleman, Sheperd S.
name: Lonsdale, Colin J.
name: Kondratko, Paul T.
name: Predmore, C. Read
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first contemporaneous 43GHz and 86GHz VLBI images of the v=1 J=2-1 and J=1-0 SiO masers in the Orion-KL nebula. Both maser species exhibit the same general morphology of earlier J=1-0 maser images which appear to trace the edges of a bi-polar conical outflow. Surprisingly, the J=2-1 masers form further from the central protostar than the J=1-0 masers, a fact not readily explained by current SiO maser pumping models. The average magnitude of offsets between corresponding regions of the two masing transitions is approximately 14% of the total radial extent of the SiO maser emission. This offset indicates that each transition must trace different physical conditions.
description: 20 pages, 4 figures
Superconducting nanobridges under magnetic fields
Creators: name: Rodrigo, J. G.
name: Suderow, H.
name: Vieira, S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on the study of superconducting nanotips and nanobridges of lead with a Scanning Tunnelling Microscope in tunnel and point contact regimes. We deal with three different structures. A nanotip that remains superconducting under a field of 2 T. For this case we present model calculations of the order parameter, which are in good agreement with the experiments. An asymmetric nanobridge of lead showing a two steps loss of the Andreev excess current due to different heating and dissipation phenomena in each side of the structure. A study of the effect of the thermal fluctuations on the Josephson coupling between the two sides of a superconducting nanobridge submitted to magnetic fields. The different experiments were made under magnetic fields up to twenty five times the volume critical field of lead, and in a temperature range between 0.6 K and 7.2 K.
description: 17 pages, 7 figures
The design and construction of a 12V solar batter charger
Creators: name: Oladipupo Adanikin
Publisher: name: figshare
Year: 2020
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This report gives the detailed description used in the design and construction of a 12V solar battery charger.
The pion mass in finite volume to two loops
Creators: name: Haefeli, Christoph
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We evaluate the pion mass in finite volume to two loops within Chiral Perturbation Theory. The results are compared with a recently proposed extension of the asymptotic formula of Luscher. We find that contributions, which were neglected in the latter, are numerically very small at the two-loop level.
description: 6 pages, 2 figures, Talk presented at Lattice 2005 (Hadron spectrum and quark masses)
Strategy equilibrium in dilemma games with off-diagonal payoff perturbations
Creators: name: Amaral, Marco A.
name: Javarone, Marco A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We analyse the strategy equilibrium of dilemma games considering a payoff matrix affected by small and random perturbations on the off-diagonal. Notably, a recent work [1] reported that, while cooperation is sustained by perturbations acting on the main diagonal, a less clear scenario emerges when perturbations act on the off-diagonal. Thus, the second case represents the core of this investigation, aimed at completing the description of the effects that payoff perturbations have on the dynamics of evolutionary games. Our results, achieved by analysing the proposed model under a variety of configurations, as different update rules, suggest that off-diagonal perturbations actually constitute a non-trivial form of noise. In particular, the most interesting effects are detected near the phase transition, as perturbations tend to move the strategy distribution towards non-ordered states of equilibrium, supporting cooperation when defection is pervading the population, and supporting defection in the opposite case. To conclude, we identified a form of noise that, under controlled conditions, could be used to enhance cooperation, and greatly delay its extinction.
title: The viability of renewable energy and energy storage for the provision of power for desalination
Creators: name: Dansoh, Clifford Kwabena Nimakoh
Publisher: name: The Open University
Year: 2012

description: This research investigates the viability of renewable energy and energy storage to meet a significant and fundamental human need (in this case, large-scale drinking water supplies) unassisted by conventional power. The use of renewable energy to power reverse osmosis desalination plants to provide potable water for around 50,000 people in Newhaven, in South East England, and in Massawa in Eritrea, was investigated. The following energy sources, in a variety of combinations were specifically assessed: • Wind Power • Wave Power • Solar Power • Tidal Current Power • Hydrogen production, storage and use in Fuel Cells. The following types of reverse osmosis plants were studied: • No Brine Stream Recovery (BSR) reverse osmosis plant • Pelton Wheel BSR reverse osmosis plant • Pressure Exchanger BSR reverse osmosis plant. Modelling was conducted to derive the amount of water that each reverse osmosis plant would deliver from various combinations and amounts of renewable power input, at varying feedwater temperatures. Scenarios that were not able to deliver enough water to meet the users' needs were scaled-up so that they could. The cost of the scaled-up scenarios that were able to meet the users' water demands were compared with the costs associated with the equivalent conventionally-powered scenario over a 25-year life. Specifically, the following were considered: • A coal-fired plant with carbon capture and storage (CCS) at Newhaven and • A diesel generator at Massawa. This comparison was made with and without the external costs associated with conventional energy production and use. The most financially-attractive scenario at each site was then assessed for its ability to meet the daily demand for water, over the course of a year. A comparison of the most financially-attractive renewable energy option and the equivalent conventionally-powered scenario at Massawa was undertaken, based on Net Present Value (NPV) methodology.
On plane wave and vortex-like solutions of noncommutative Maxwell-Chern-Simons theory
Creators: name: Alexanian, G.
name: Arnaudon, D.
name: Paranjape, M. B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the spectrum of the gauge theory with Chern-Simons term on the noncommutative plane, a modification of the description of the Quantum Hall fluid recently proposed by Susskind. We find a series of the noncommutative massive ``plane wave'' solutions with polarization dependent on the magnitude of the wave-vector. The mass of each branch is fixed by the quantization condition imposed on the coefficient of the noncommutative Chern-Simons term. For the radially symmetric ansatz a vortex-like solution is found and investigated. We derive a nonlinear difference equation describing these solutions and we find their asymptotic form. These excitations should be relevant in describing the Quantum Hall transitions between plateaus and the end transition to the Hall Insulator.
description: 17 pages, LaTeX (JHEP), 1 figure, added references, version accepted to JHEP
Laboratory observation of a nonlinear interaction between shear Alfvén waves
Creators: name: Carter, T. A.
name: Brugman, B.
name: Pribyl, P.
name: Lybarger, W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: An experimental investigation of nonlinear interactions between shear Alfvén waves in a laboratory plasma is presented. Two Alfvén waves, generated by a resonant cavity, are observed to beat together, driving a low frequency nonlinear psuedo-mode at the beat frequency. The psuedo-mode then scatters the Alfvén waves, generating a series of sidebands. The observed interaction is very strong, with the normalized amplitude of the driven psuedo-mode comparable to the normalized magnetic field amplitude ($δB/B$) of the interacting Alfvén waves.
description: 10 pages, 4 figures, submitted to Phys. Rev. Lett
The transcriptomes of cave and surface populations of Gammarus minus (Crustacea : Amphipoda) provide evidence for positive selection on cave downregulated transcripts
Creators: name: Carlini, David
name: Fong, Daniel
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 31
subject: Biological sciences
subject: FOS: Biological sciences

description: Gammarus minus, a freshwater amphipod living in the cave and surface streams in the eastern USA, is an excellent model for investigating evolutionary adaptation to the subterranean environment. RNA-Seq was conducted on one pair of morphologically distinct sister populations inhabiting surface and cave habitats to identify genes that were differentially expressed in the two populations, as well as to compare levels and patterns of genetic variation within and between populations. Of the 104,630 transcripts identified in the transcriptome assembly, 57% had higher average levels of expression in the cave population. After Benjamini- Hochberg correction for multiple tests, 1517 and 551 transcripts were significantly upregulated or downregulated, respectively, in the cave population, indicating an almost three-fold enrichment of cave-upregulated genes. The average level of nucleotide diversity across all transcripts was significantly lower in the cave population. Within the cave population, where the average nucleotide diversity of cave-downregulated transcripts was 75% that of the cave-upregulated transcripts, a highly significant difference, whereas within the spring population the nucleotide diversities of cave-downregulated and cave-upregulated transcripts was virtually identical. Three lines of evidence suggest that the reduced variation in cave downregulated transcripts is due to positive selection in the cave population: 1) the average neutrality index of cave-downregulated genes was < 1, consistent with positive selection, and significantly less than that of cave-upregulated genes; 2) Tajima's D was positively correlated with the cave:surface expression ratio, and 3) cave-downregulated transcripts were significantly more likely to be highly diverged from their surface homologs than cave-upregulated transcripts. Five transcripts had fixed premature termination codons in the cave population. The expression patterns and sequence variation in one such transcript, encoding the DNA repair protein photolyase, were examined in more detail and provide the first evidence for the relaxation of functional constraint in this light-dependent protein in a subterranean population.
A neural network approach to navigation of a mobile robot and obstacle avoidance in dynamic and unknown environments.pdf
Creators: name: Shamsfakhr, F.
name: Bigham, Bahram Sadeghi
Publisher: name: figshare
Year: 2021
Subjects: Applied Computer Science

description: Nowadays, communication devices are widespread exponentially. People use some of these devices in daily life like as usingmobile to access for shopping from Internet and pay by credit cards or student email their homework to their teacher. In otherwords, Internet network plays significant roles in people’s life. Therefore, some features such as access to Internet fromeverywhere, connection bandwidth and minimum necessary devices to connect and use network are important in make bettersatisfaction of people.In this article, a master plan of infrastructure is suggested that city which built base on this infrastructure, people in city can connect to Data center from anywhere with simple and usual tools like PDA, Notebook and also cell phones and also superior manager can use the information to make proper decisions and as a result they can offer a fast and appropriate sort of management. In this instruction, people can easily connect to Metropolitan Area Network (MAN) then use IT subsystems like E-commerce, E-learning, E-health and others and enjoy from IT subsystem advantages in city.In this design, there are some important factors that we must attend to them because they affect the result, some of them such as speared of access point to MAN, independent from especial hardware requirement, Network Bandwidth and simple using structure for people. So, in theresult, the useful information of people is saved in Data center and people or organization can reach these data easily and usepeople data in time.