cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interfacial modification for carbon nanotubes enhanced magnesium alloys
Creators: name: Hisham, Syazana
Publisher: name: Imperial College London
Year: 2023

description: Magnesium (Mg) offers a tremendous weight saving potential as an advanced lightweight material in the automotive and aerospace industries. However, the application of Mg is limited by its low corrosion resistance and low mechanical properties especially at elevated temperature. To overcome the limitations of Mg, carbon nanotubes (CNTs) are considered to be ideal for the fabrication of Mg matrix composites due to their high aspect ratio and superior mechanical properties. However, the design of CNTs-reinforced Mg matrix composites requires a homogeneous dispersion of CNTs and a good interfacial bonding between the CNTs and the Mg matrix for an effective strengthening of the composites by CNTs. Consequently, the coating of CNTs is considered to be an effective strategy to improve the wettability of CNTs by Mg and promote the dispersion of CNTs in the metal matrix. In this work, a new technique was developed for the coating of CNTs with either SiOC or SiC using a polymethylhydrosiloxane (PMHS) precursor to enhance the properties of AZ91 composites. Initially, the transformation of PMHS to SiOC and SiC was established via a simple curing technique followed by pyrolysis in Ar at 900 and 1500 °C, respectively. Then, a preliminary application of PMHS as a coating precursor for CNTs found that SiOC can be coated on the individual CNTs as a discontinuous or continuous coating layer or precipitated densely on the CNTs agglomerates. The effect of coating concentration on the morphology and dispersibility of the CNTs were further studied through a more extensive production of SiOC and SiC coated CNTs. Intermediate coating concentration (i.e. 45-55 wt%) was found to be suitable for the wetting of CNTs by the AZ91. The addition of either SiOC coated CNTs or SiC coated CNTs had successfully led to a notable grain refinement by up to 66 % in grain size reduction, increase in hardness by up to 17 %, and increase in yield strength by up to 15 % in the AZ91 composites in comparison to the pure AZ91.
Personalized Travel Route Recommendation Based on GPS Trajectories
Creators: name: Cui, Ge
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Personalized route recommendation
subject: GPS trajectories
subject: Map matching
subject: Sociology--Transportation

description: Travelling is a critical component of daily life. With new technology, personalized travel route recommendations are possible and have become a new research area. A personalized travel route recommendation refers to plan an optimal travel route between two geographical locations, based on the road networks and users’ travel preferences. In this thesis, it first proposes a segment-based map matching method to locate GPS trajectories onto the road network, and then extract users’ travel behaviours from their historical routes. Next, users’ travel behaviour frequencies are estimated by using collaborative filtering technique. This thesis defines two types of travel behaviours, appearance behaviour and transition behaviour, from users’ historical GPS trajectories and propose three personalized travel route recommendation methods¬, including CTRR, CTRR + and Map2R, to consider users’ personal travel preferences based on their historical GPS trajectories. A route with the maximum probability of a user’s travel behaviour is then generated. CTRR only considers user’s appearance behaviour and calculates the maximum probability route based on naïve Bayes model. Besides, CTRR is extended to CTRR+ by integrating distance with the user appearance behaviour probability. In MaP2R, it considers both appearance behaviour and transition behaviour, and calculate the maximum probability route based on Markov model. This thesis also conducts some case studies based on a real GPS trajectory dataset from Beijng, China. The experimental results show that the proposed CTRR methods achieve better results for travel route recommendations compared with the shortest distance path method, and both CTRR+ and MaP2R can enhance the performance of CTRR, respectively.
Future singularity avoidance in phantom dark energy models
Creators: name: de Haro, Jaume
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Different approaches to quantum cosmology are studied in order to deal with the future singularity avoidance problem. Our results show that these future singularities will persist but could take different forms. As an example we have studied the big rip which appear when one considers the state equation $P=ωρ$ with $ω
description: Accepted for publication in JCAP
Relationships between nitrogen, phosphorus and diel dissolved oxygen cycles in the Bow River, Calgary, Alberta before and after a century-scale flood
Creators: name: Singer, Jarvis Garry
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: nitrogen
subject: phosphorus
subject: dissolved oxygen
subject: Bow River
subject: flood
subject: Ecology
subject: FOS: Biological sciences
subject: Limnology
subject: Engineering--Environmental

description: High nutrient loading to rivers increases aquatic plant and algal growth resulting in low dissolved oxygen (DO) concentrations. The overall objective of this thesis was to examine the relationship of nitrogen (N) and phosphorus (P) in diel DO cycles induced by periphyton and macrophyte photosynthesis and respiration in the Bow River. I tested periphyton and macrophyte nutrient limitation status directly using fertilization experiments at multiple locations within Calgary’s wastewater treatment plant (WWTP) effluent affected urban footprint. My results show that immediately after the 2013 flooding, primary production was limited by P (periphyton) or N+P (macrophytes). I investigated empirical relationships between periphyton, macrophytes and diel dissolved oxygen concentrations before and after a 1 in 100-year flooding event. The near complete removal of macrophytes was associated with only a transient decrease in the magnitude of diel DO oscillations at sites downstream of WWTPs.
Cooling a nanomechanical resonator by a triple quantum dot
Creators: name: Li, Zeng-Zhao
name: Ouyang, Shi-Hua
name: Lam, Chi-Hang
name: You, J. Q.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an approach for achieving ground-state cooling of a nanomechanical resonator (NAMR) capacitively coupled to a triple quantum dot (TQD). This TQD is an electronic analog of a three-level atom in $Λ$ configuration which allows an electron to enter it via lower-energy states and to exit only from a higher-energy state. By tuning the degeneracy of the two lower-energy states in the TQD, an electron can be trapped in a dark state caused by destructive quantum interference between the two tunneling pathways to the higher-energy state. Therefore, ground-state cooling of an NAMR can be achieved when electrons absorb readily and repeatedly energy quanta from the NAMR for excitations.
description: 6 pages, 3 figures
Islamic education in a multicultural context : the case of two educational institutions in British Columbia
Creators: name: Omar, Abdullahi
Publisher: name: University of British Columbia
Year: 2011

description: The purpose of this study is to increase understanding of Islamic education in Canada with an emphasis on how two educational institutions promote and maintain an Islamic worldview and identity in a secular pluralistic society. To achieve this goal, the study explores the nature and meaning of Islamic education in a national context, in which such education is caught between the edict to transmit and promote Islamic values on the one hand, and secular multiculturalism values on the other. This qualitative research uses an instrumental case study to provide an in-depth understanding of two participating Muslim schools in British Columbia, Canada. The case study, however, instrumentally offers understanding for Islamic education in a multicultural context. Findings from this research indicate that while Islamic educational institutions in Canada utilize various tools to nurture Islamic identity and worldview, they still face considerable internal challenges including limited resources and internal diversity. The internal challenges are exacerbated by external pressures in the form of Islamophobic sentiments fueled by poor media coverage. The dissertation recommends that Islamic educational institutions join the multicultural conversation with a genuine Islamic voice. Similarly, in order for these institutions to provide adequate Islamic education, they need to adopt targeted Islamization and embrace multiple identities.
Absorbing Subalgebras, Cyclic Terms, and the Constraint Satisfaction Problem
Creators: name: Barto, Libor
name: Kozik, Marcin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.2.2, F.4.1

description: The Algebraic Dichotomy Conjecture states that the Constraint Satisfaction Problem over a fixed template is solvable in polynomial time if the algebra of polymorphisms associated to the template lies in a Taylor variety, and is NP-complete otherwise. This paper provides two new characterizations of finitely generated Taylor varieties. The first characterization is using absorbing subalgebras and the second one cyclic terms. These new conditions allow us to reprove the conjecture of Bang-Jensen and Hell (proved by the authors) and the characterization of locally finite Taylor varieties using weak near-unanimity terms (proved by McKenzie and Maróti) in an elementary and self-contained way.
Historic and Archaeological Reconnaissance/Inventory Survey: Cultural Resources Management Plan, New Boston Air Force Station, New Boston, Mont Vernon, Amherst, New Hampshire, Volume 2
Creators: name: The Public Archaeology Laboratory
Publisher: name: ENSR Consulting and Engineering
Year: 1993
Subjects: New Boston Air Force Station
Mont Vernon, NH
Wells Bog
New Boston, NH
Merrimack River
New Hampshire (State / Territory)
Hillsborough (County)
Joe English Hill
Amherst, NH
19th Century - 20th Century
Prehisotric
Historic
Prehistoric
HS #16
HS #15
HS #18
HS #17
HS #20
HS #19
HS #22
HS #21
HS #24
HS #01
HS #23
HS #26
HS #03
HS #02
HS #28
HS #05
HS #27
HS #04
HS #07
HS #06
HS #09
HS #08
Wells Bog Site
East Meadow Site
Find Spot #2
Find Spot #1
Find Spot #4
Find Spot #3
HS # 25
HS #10
HS #12
HS #11
HS #14
HS #13
Domestic Structures
Historic Structure
Water Control Feature
Rock Alignment
Mill
Road
Wood
Textile
Ceramic
Chipped Stone
Fauna
Glass
Building Materials
Metal
Volume 2
Inventory survey
Cultural Resource Management Plan
Archaeological Overview
Historic Background Research
Architectural Survey
Reconnaissance / Survey
Site Evaluation / Testing
Systematic Survey

description: This is Volume 2 of Public Archaeology Laboratory Inc., under contract with ENSR Consulting and Engineering, historic and archaeological reconnaissance/inventory survey of the New Boston Air Force Station (NBAFS) located in New Boston, Mont Vernon, and Amherst, New Hampshire. This volume includes appendices, representative soils profiles from prehistoric and historic sites, photograph logs, photographs of prehistoric sites within NBAFS, photographs of visible structures for HS #1-28 within NBAFS, and NHDHR inventory forms for prehistoric and historic sites.
Cultural Resource Survey and Evaluation, U.S. Army Training Center and Fort Dix, Volume II: Technical Appendices - Appendix A
Creators: name: Louis Berger & Associates, Inc.
name: Heritage Studies, Inc.
Publisher: name: Louis Berger & Associates, Inc.
Year: 1985
Subjects: Springfield Township
Fort Dix
New Hanover, NJ
Pemberton Township
Burlington (County)
Pointville, NJ
New Jersey (State / Territory)
Ocean (County)
Monmouth (County)
Philadelphia, PA
Wrightstown, NJ
Historic
Canal or Canal Feature
Archaeological Feature
Pit
Non-Domestic Structures
Road, Trail, and Related Structures or Features
Church / Religious Structure
Mill
Railroad
Historical Map
Site List
Appendices
Archaeological Overview
Historic Background Research
Architectural Survey
Reconnaissance / Survey
Heritage Management
Records Search / Inventory Checking

description: This document only contains Appendix A of the original report. 

Appendix A represents the results of the historic map search for potential historic sites within the boundaries of the USATCFD reservation. All potential sites are listed in table form. Each table references particular sites (generally farmsteads) to the historic maps in which they appear and each site is located on current USGS 7.5' topographic maps. The historic maps are located in the beginning of the appendix. The topographic maps are located after each table.

Full Volume I report can be found in tDAR at:
https://core.tdar.org/document/438622

The full Volume II report can be found in tDAR at: https://core.tdar.org/document/438623
Sema6d Signaling in the Developing Visual System
Creators: name: Cechmanek, Paula Bernice
Publisher: name: Cumming School of Medicine
Year: 2018
Subjects: subject: Semaphorin
subject: Plexin
subject: Eye
subject: Developmental Biology
subject: Retinal Pigment Epithelium
subject: RPE
subject: Sema6D
subject: Zebrafish
subject: Morphogenesis
subject: Optic Cup
subject: Tissue Sliding
subject: bhlhe40
subject: tfec
subject: Danio rerio
subject: Biology
subject: Biology--Cell
subject: Biology--Molecular

description: The retinal pigment epithelium (RPE) is a highly specialized monolayer of epithelial cells that arise from retinal progenitors and form a tight barrier between the neural retina (eye) and the brain. Although only a thin monolayer, RPE cells perform numerous important functions and are indispensible for mature photoreceptor renewal and survival. When RPE dysfunction occurs, in diseases like Retinitis Pigmentosa and Age-related Macular Degeneration (AMD), devastating vision loss can occur. While much work has focused on understanding RPE function in adult life, little is known about how the RPE arises during early embryonic life or how it spreads to wrap around the neural retina. In this thesis I use zebrafish (Danio rerio) as a model to a) characterize early RPE development, and b) implicate the classical axon guidance cue Semaphorin6d (Sema6d), and its receptor Plexina1 (Plxna1), in RPE and optic cup morphogenesis in the developing zebrafish embryo. I show that markers of RPE differentiation turn on in RPE progenitors prior to optic cup morphogenesis, and that RPE morphogenesis occurs in two phases: First an antero-posterior expansion of the RPE progenitor domain, followed by a second phase coupled to optic cup morphogenesis, where the RPE domain is stretched to form a thin, single-cell epithelium around the eye. Through Sema6d loss-of-function analysis I show that this second phase depends on signals between the Sema6d-expressing progenitors of the temporal neural retina and RPE progenitors expressing Plxna1. This is the first signaling pathway to be identified as a driver for optic cup morphogenesis in any model system. Developing zebrafish as a model system to study early RPE development and retinal cell migration may provide insights to understanding human RPE/retinal cell migration during development and disease.
Wave scattering on a domain wall in a chain of PT-symmetric couplers
Creators: name: Suchkov, Sergey V.
name: Dmitriev, Sergey V.
name: Malomed, Boris A.
name: Kivshar, Yuri S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We study wave propagation in linear arrays composed of pairs of conjugate waveguides with balanced gain and loss, i.e. arrays of the PT-symmetric couplers, where the linear spectrum is known to feature high-frequency and low-frequency branches. We introduce a domain wall by switching the gain and loss in a half of the array, and analyze the scattering of linear waves on this defect. The analysis reveals two major effects: amplification of both reflected and transmitted waves, and excitation of the reflected and transmitted low-frequency and high-frequency waves by the incident high-frequency and low-frequency waves, respectively.
description: 7 pages, 9 figures, Physical Review A, in press
Physicochemical and Functional Properties of Cactus ‘Opuntia ficus- indica L.’ Muller Flour: The Case of Cactus Fruit and Vegetable Flour
Creators: name: Batu, Worku
name: Getahun, Dawit
name: Abreha, Gebremicheal
Publisher: name: Journal of Science and Sustainable Development
Year: 2018

description: This paper analyzed the physicochemical properties, functional properties and proximate composition of cactus tuna flour and cactus napolite flours prepared from cactus pear fruit–vegetable parts. Immature cactus fruit and leaf-vegetable parts were dried at 60°C, 70°C and 80°C. The cactus fruit ‘tuna’ and napolite parts of plants were dried and thoroughly milled into flour. The flours were analyzed for physicochemical properties, functional properties and proximate composition. The analyses showed no significant differences in crude protein, total lipid, crude fiber and total ash content in the flours. The results also revealed that napolite flour has higher moisture content and total solid 6.85% and 18.50%, respectively while tuna flour had higher ash (26.20%) and crude fiber (22.11%). The PH value of fresh fruit-vegetable was found to be between 6.20 – 6.65 while the flours PH value lies between 5.27 – 5.80. Functional properties for napolite flour showed water and oil holding capacity of 14.12 (60oC), 8.35 (70 °C), 6.42 (80oC), and 2.02 (60oC), 2.01 (70oC), 2.02 (80oC) respectively. On the other hand, water and oil holding capacity of tuna flour were 16.24 (60oC), 10.21 (70oC), 7.12 (80oC), and 3.01 (60oC), 3.02 (70oC), 3.01 (80oC) respectively. At 60oC to 80oC a reduction of water holding capacity (54.3%) was observed in napolite flour, while 56.12% observed in tuna flour. The cladodes flours prepared at 60°C presented a higher quality regarding their nutritional and functional properties. Similarly, cactus fruit-vegetable flour had higher potential of water holding capacity and others functional properties. The physicochemical properties and functional properties of Cactus fruit – vegetable flour have good potential and nutritional value to service as flour.
description: Journal of Science and Sustainable Development, Vol. 6 No. 1 (2018)
Business Cycles and Hydrocarbon Gas Liquids Prices
Creators: name: Jahan, Sayeeda
Publisher: name: Arts
Year: 2018
Subjects: subject: Business cycles
subject: Hydrocarbon gas liquids prices, Stylized facts
subject: Hamilton filter
subject: Hodrick-Prescott (HP) filter, Granger causality tests
subject: Education--Finance
subject: Energy

description: This thesis examines the basic stylized facts of hydrocarbon gas liquids (HGL) prices using monthly data for the United States, over the period from 1985:1 to 2018:1. I follow the Kydland and Prescott (1990) methodology, using the Hamilton’s (2017) regression filter to investigate the cyclical properties of HGL prices. The results indicate that HGL prices are procyclical and mostly lead the cycle of industrial production. HGL prices are also positively contemporaneously correlated with crude oil and natural gas prices and are synchronous with the cycle of crude oil and natural gas prices. I also find that industrial production causes natural gas and HGL prices, where, normal butane, isobutane, and crude oil prices cause industrial production. Moreover, I find that crude oil prices cause all HGL prices. Finally, there is no causality from natural gas prices to HGL prices, however, there is causality from ethane, normal butane, and naphtha prices to natural gas prices.
Quantum oscillations of dissipative resistance in crossed electric and magnetic fields
Creators: name: Dietrich, Scott
name: Byrnes, Sean
name: Vitkalov, Sergey
name: Dmitriev, D. V.
name: Bykov, A. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Oscillations of dissipative resistance of two-dimensional electrons in GaAs quantum wells are observed in response to an electric current I and a strong magnetic field applied perpendicular to the two-dimensional systems. Period of the current-induced oscillations does not depend on the magnetic field and temperature. At a fixed current the oscillations are periodic in inverse magnetic fields with a period that does not depend on dc bias. The proposed model considers spatial variations of electron filling factor, which are induced by the electric current, as the origin of the resistance oscillations.
description: 8 pages, 6 figures. arXiv admin note: text overlap with arXiv:1206.5233
The Exclusionary Politics of Secondary Suites in Calgary: Homeowners Seeking Class Monopoly Rents
Creators: name: Van Der Poorten, Kylee Aisha
Publisher: name: Arts
Year: 2018
Subjects: subject: secondary suites
subject: urban political geography
subject: neighbourhood politics
subject: homeowners
subject: urban planning
subject: Education--Social Sciences
subject: Geography
subject: Urban and Regional Planning
subject: FOS: Social and economic geography

description: Secondary suites, broadly defined as additional rental dwelling units within single-detached properties, have been a contentious topic in Calgary’s municipal politics for the past three decades. In most cases, suites operate in basements and thus conceal living standards and evade the gaze of the local state. To date, Calgary maintains a high restrictive approach to secondary suites in established suburban areas. Evidence suggests an effective opposition from a vocal minority of residents and community leaders has inhibited secondary suite proponents from easing barriers to legalization. These housing politics are the focus of this study. Using a mixed-method approach, I explore the key institutional actors opposing secondary suite legalization, the basis of their opposition, and the mechanisms they use to steer policy toward their interests. A major finding is that exclusionary practices of neighbourhood governance and coalitions among community association leaders have been an integral part of Calgary’s secondary suite outcomes.
A Note on Separable Nonlinear Least Squares Problem
Creators: name: Gharibi, Wajeb
name: Al-Mushayt, Omar Saeed
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: Separable nonlinear least squares (SNLS)problem is a special class of nonlinear least squares (NLS)problems, whose objective function is a mixture of linear and nonlinear functions. It has many applications in many different areas, especially in Operations Research and Computer Sciences. They are difficult to solve with the infinite-norm metric. In this paper, we give a short note on the separable nonlinear least squares problem, unseparated scheme for NLS, and propose an algorithm for solving mixed linear-nonlinear minimization problem, method of which results in solving a series of least squares separable problems.
description: 3 pages; IEEE, 2011 International Conference on Future Computer Sciences and Application (ICFCSA 2011), Jun. 18- 19, 2011, Hong Kong
Identifying potential microbial aetiologies of Kawasaki Disease with metagenomics and metaproteomics
Creators: name: McArdle, Andrew
Publisher: name: Imperial College London
Year: 2022

description: Kawasaki disease (KD) is an acute inflammatory disorder of early childhood. It causes coronary artery aneurysms, due to the vasculitis which underlies much pathology. Despite epidemiological evidence supporting an infectious trigger in predisposed individuals, decades of research have found no strong evidence to implicate an individual organism. A diverse range of organisms have been suggested as the cause, frequently with limited or contradictory evidence. Studies are typically small and consider a narrow range of organisms, mostly pathogens. Two promising sites to search for microbial material are the oropharynx and immune complexes (IC). The former is the main microbial entry portal, and the latter form in the subacute phase of illness and may include microbial antigen. I present bioinformatic analyses aiming to identify microbes associated with KD from these two sources. Data comprises oropharyngeal metagenomics (116 cases; 101 controls) and metaproteomics of ICs (112 cases; 128 controls). Extensive method development was required, with a focus on mitigating against laboratory and reference database contamination for metagenomics and finding database search methods which could cope with a vast metaproteomic search space. Metaproteomic analyses yielded no strong evidence of microbial associations, though the data allowed novel, exploratory analysis of immunoglobulin peptides and germline immunoglobulin locus usage. Since immunoglobulin is strongly implicated both genetically and pathologically in KD, the methods developed here show potential for further development and application. Metagenomic analyses found organisms associated with KD, including Abiotrophia defectiva and Lautropia mirabilis (six-fold higher abundance, Q values 0.06 and 0.05 respectively). The strengthening of relationships when age-profiles are modelled, and previous implication of A. defectiva in infective endocarditis add to the potential significance of the findings. I interpret the results in the light of the epidemiology of KD and consider the limitations of this study, and challenges inherent in the search for causes of KD.
Model independent analysis of top quark forward-backward asymmetry at the Tevatron up to $\mathcal{O}(\as^2/Λ^2)$
Creators: name: Shao, Ding Yu
name: Li, Chong Sheng
name: Wang, Jian
name: Gao, Jun
name: Zhang, Hao
name: Zhu, Hua Xing
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the complete calculations of the forward-backward asymmetry ($A_{\rm FB}$) and the total cross section of top quark pair production induced by dimension-six four quark operators at the Tevatron up to $\mathcal{O}(\as^2/Λ^2)$. Our results show that next-to-leading order (NLO) QCD corrections can change $A_{\rm FB}$ and the total cross section by about 10%. Moreover, NLO QCD corrections reduce the dependence of $A_{\rm FB}$ and total cross section on the renormalization and factorization scales significantly. We also evaluate the total cross section and the charge asymmetry ($A_{\rm C}$) induced by these operators at the Large Hadron Collider (LHC) up to $\mathcal{O}(\as^2/Λ^2)$, for the parameter space allowed by the Tevatron data. We find that the value of $A_{\rm C}$ induced by these operators is much larger than SM prediction, and LHC has potential to discover these NP effects when the measurement precision increases.
description: 25 pages, 10 figures; final version in PRD
Additional file 1 of Bilateral thalamic lesions in a patient with probable acute disseminating encephalomyelitis: a case report
Creators: name: Zheng, Yiming
name: Zhang, Wei
name: Hao, Hongjun
name: Gao, Feng
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1.
Comparison of fosmid libraries made from two geographic isolates of Caenorhabditis elegans
Creators: name: Perkins, Jaryn Daniel
Publisher: name: University of British Columbia
Year: 2011

description: To fill a need in the Caenorhabditis elegans community for genomic DNA held in manageably sized clones for complementation assays, a fosmid library was made from the N2 strain. These fosmid clones were aligned to the canonical sequence and cover 80% of the genome, but there were 396 gaps in contiguous coverage spread over the worm’s six chromosomes. In an attempt to fill in some of these gaps in the original fosmid clones’ sequence, we made another library from the Hawaiian geographic isolate CB4856. Our hope was that the divergence, inherent in the deletions containing 517 genes, between the two genomes would aid in the capture of previously gapped regions. This hope was justified. This thesis outlines the production and comparison of the two C. elegans fosmid libraries made from N2 and CB4856 and provides evidence that the way genomic libraries are made can affect the sequences packaged. Combining the two libraries, we now have a total coverage of 92.8% of genes and 90.43% of sequence in relation to the N2 canonical genome.
Redox-active metal-organic frameworks
Creators: name: Golomb, Matthias
Publisher: name: Imperial College London
Year: 2023

description: Metal-organic frameworks (MOFs) are porous hybrid organic-inorganic materials, which are usually formed by connecting metal nodes and organic ligands to create an extended periodic framework. Their modular building block formation gives rise to a large chemical space of possible combinations and topologies with a wide variety of properties. Recent approaches have demonstrated the capability of redox-active MOFs for energy storage devices such as batteries and supercapacitors. Their intrinsically low electronic conductivity, however, remains a challenge to overcome to improve their viability for device implementation. This thesis investigates the simulation of redox-active MOFs, focusing on the prediction of conductive frameworks and calculation of relevant parameters that can be measured in experiment. It introduces the theoretical framework for the simulation of these materials: Density Functional Theory (DFT) as the central part of the performed calculations, the calculations necessary for the prediction of band and hopping transport parameters, as well as a short outline of machine learning basics. Firstly, it demonstrates the possibility of predicting the effects of building block substitution on the conductivity of MOFs. Then, it explores how band transport can reproduce experimental conductivity value trends, as long as structural features are accurately taken into account, thus emphasizing the importance of solvent counterions in the framework pore. The ensuing results further explore methods for the calculation of hopping transfer rates that take the full periodic structure into account. The last chapter investigates the prediction of MOF electrode voltages based on pristine structure calculations, employing machine learning to predict the most likely ion adsorption site in a framework and the corresponding energy of intercalation. Taking these results into account, a framework for the exploration of MOF chemical space for energy storage purposes is suggested.
Das neue IÖR-Forschungsdatenzentrum und aktuelle Ergebnisse des IÖR-Monitors
Creators: name: Voshage, Ramona
name: Krüger, Tobias
Publisher: name: Zenodo
Year: 2023
Subjects: DFNS 2023

description: Der Übersichtsvortrag gliedert sich in zwei Teile. Im ersten Teil wird das sich im Aufbau befindliche Forschungsdatenzentrum des Leibniz-Instituts für ökologische Raumentwicklung (IÖR-FDZ) vorgestellt sowie dessen Datenprodukte präsentiert. Diese umfassen neben den Daten des Monitors der Siedlungs- und Freiraumentwicklung (https://ioer-monitor.de) weitere Informationssysteme, wie das „Informations­system Gebaute Umwelt“ (https://ioer-isbe.de) sowie das neue „Informationssystem Ökosysteme Deutschland“ (https://ioer-fdz.de/oekosysteme-deutschland). Mit dem IÖR-FDZ wird das Ziel verbunden, die Forschungsdaten des IÖR systematisch, vollständig und open data zu veröffentlichen. Die Daten werden in dem FAIR-gerecht aufgebauten IÖR-Repositorium bereitgestellt. Daneben wird das IÖR-FDZ auch Tools anbieten, die kommunale Verwaltungen und die Zivilgesellschaft bei Transformationsprozessen zu mehr Nachhaltigkeit datentechnisch unterstützen sollen (u. a. Colouring Cities, GOAT, meinGrün und KLIPS). Weiterhin werden die Angebote des IÖR-FDZ durch Wissensvermittlung, wie jährliche Sommerschulen oder E-Learning-Angebote (z. B. OpenGeoEdu), unterstützt. Nach der Ende 2025 endenden dreijährigen Aufbauphase wird der operationelle Betrieb beginnen. Der Beitrag wird den Stand des FDZ-Aufbaus präsentieren und auf die geplanten Entwicklungen eingehen. Im zweiten Teil des Beitrags wird auf Ergebnisse des IÖR-Monitors eingegangen. Das betrifft die aktuelle Indikatorwerte von 2022 zur Flächeninanspruchnahme, zur Siedlungsdichte, zum Flächenbedarf von Freiflächen-Photovoltaik und Windkraftanlagen sowie weitere Indikatorwertentwicklungen einschließlich einer kurzen Bewertung. Zudem werden Analyseergebnisse zum Ökolandbau (basierend auf InVeKos-Daten), zur Vor- und Nachnutzung von Landwirtschaftsflächen sowie zur ackerbaulichen Nutzungen in Schutzgebieten vorgestellt. Letztere wurden im Rahmen des BMBF-Projekts „Diversität von Insekten in Naturschutz-Arealen“ (DINA) erhoben. Unerwartetes Ergebnis ist die erhebliche ackerbauliche Nutzung in Schutzgebieten und die riesige Grenzlinienlänge (11.000 km) zwischen Naturschutz und umliegender ackerbauliche Nutzung.
Determining the DNA stability parameters for the breathing dynamics of heterogeneous DNA by stochastic optimization
Creators: name: Talukder, Srijeeta
name: Chaudhury, Pinaki
name: Metzler, Ralf
name: Banik, Suman K
Publisher: name: arXiv
Year: 2011
Subjects: subject: Biomolecules (q-bio.BM)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We suggest that the thermodynamic stability parameters (nearest neighbor stacking and hydrogen bonding free energies) of double-stranded DNA molecules can be inferred reliably from time series of the size fluctuations (breathing) of local denaturation zones (bubbles). On the basis of the reconstructed bubble size distribution, this is achieved through stochastic optimization of the free energies in terms of Simulated Annealing. In particular, it is shown that even noisy time series allow the identification of the stability parameters at remarkable accuracy. This method will be useful to obtain the DNA stacking and hydrogen bonding free energies from single bubble breathing assays rather than equilibrium data.
description: 6 pages, 4 figures
Observational constraints on a Yang-Mills condensate dark energy model
Creators: name: Fu, Z. W.
name: Zhang, Y.
name: Tong, M. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using the recently released Union2 compilation with 557 Type Ia supernovae, the shift parameter of cosmic microwave background given by the WMAP7 observations, and the baryon acoustic oscillation measurement from the Sloan Digital Sky Survey, we perform the $χ^2$ analysis on the 1-loop Yang-Mills condensate (YMC) dark energy model. The analysis has been made for both non-coupling and coupling models with $Ω_{m0}$ and $w_0$ being treated as free parameters. It is found that, $χ^2_{min}$ = 542.870 at $Ω_{m0}$ = 0.2701 and $w_0$ = -0.9945 for non-coupling model, and $χ^2_{min}$ = 542.790 at $γ$ = -0.015, $Ω_{m0}$ = 0.2715 and $w_0$ = -0.9969 for coupling model. Comparing with the $Λ$CDM model, the YMC model has a smaller $χ^2_{min}$, but it has greater values of the Bayesian and Akaike information criteria. Overall, YMC is as robust as $Λ$CDM.
description: 12 pages, 3 figures
Effects of wave exposure and shore level on seagrass abundance and distribution in the intertidal community
Creators: name: Kattika Pattarach
name: Jatdilok Titioatchasai
name: Anuchit Darakrai
name: Jaruwan Mayakun
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2018
Subjects: Cymodocea
intertidal seagrass community
seagrass community
Thalassia
wave action

description: Songklanakarin Journal of Science and Technology, 40, 6, 1446-1450
Optimum Switch Timing for Steam-Assisted Gravity Drainage (SAGD) after Cyclic Steam Stimulation (CSS) in a Viscous Oil Reservoir
Creators: name: Liu, Siyuan
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Engineering
subject: Engineering--Petroleum

description: Steam-Assisted Gravity Drainage (SAGD) is often adopted as a follow-up process of Cyclic Steam Stimulation (CSS) for heavy oil exploitations. Conventionally, CSS is first applied, and the operation strategy turns to SAGD after the CSS has reached its economic limit. However, considering the entire well life production, this timing scheme may not be the best. This study analyzes the optimum timing for the switch from CSS to SAGD. A numerical simulation method is employed to optimize the timing for CSS to SAGD and several levels of oil viscosity, permeability, formation thickness, and well spacing are analyzed respectively. AA net present value (NPV) is set as the objective function to evaluate the overall performance and its sensitivity to the switch point. The optimized operating conditions (temperature, pressure, and cycle lengths) corresponding to the highest NPV are also generated. In short, this study helps to maximize the profit of heavy oil development by determining the optimum switch timing from CSS to SAGD processes.
Genetic diversity of Sauropus androgynus L. shoot culture after UV-C treatment assessed using RAPD markers
Creators: name: Ratchanee Petchang
name: Ruttaporn Chundet
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2018
Subjects: genetic
Sauropus androgynus L.
UV-C
RAPD

description: Songklanakarin Journal of Science and Technology, 40, 6, 1451-1455
Comment s’y retrouver à travers la multitude de protocoles de recension systématique? Constats à propos des protocoles internationaux et exemple d’adaptation
Creators: name: Houle, Andrée-Anne
name: Bérubé, Annie
name: Besnard, Thérèse
Publisher: name: Revue francophone de recherche sur le transfert et l’utilisation des connaissances
Year: 2019

description: La recension systématique est un outil synthèse d’une grande fiabilité et précision qui permet d’identifier, de collecter et de partager des informations, et qui peut donc servir de base à un transfert des connaissances. Le but du présent article est de résumer les protocoles de six organisations internationales en synthèse des connaissances pour en tirer un regard critique concernant leurs similitudes et leurs particularités respectives. Il est possible de constater que l’expertise particulière de certaines organisations est reconnue par les autres organisations. Des outils élaborés par certaines organisations sont également utilisés dans les protocoles de d’autres organisations. Mais devant la diversité de protocoles, comment savoir lequel est le plus adapté à une démarche de recherche en particulier? Un exemple d’adaptation d’un protocole de recension systématique d’études mixtes en sciences sociales est présenté. Cet exemple vise à démontrer qu’il est possible de combiner les outils et les idéologies des différentes organisations internationales et d’intégrer d’autres outils afin d’élaborer un protocole de recension qui répond à des besoins de recension spécifiques. Cet article permet aux chercheurs de se questionner sur leurs habitudes en matière de recension systématique et de les amener à réfléchir aux adaptations qu’ils peuvent apporter à leurs protocoles pour qu’ils soient pertinents et cohérents en fonction de leur question de recherche.
description: Revue francophone de recherche sur le transfert et l’utilisation des connaissances , Vol. 3 No 1 (2019)
Gravity with extra dimensions and dark matter interpretation: A straightforward approach
Creators: name: Coimbra-Araujo, C. H.
name: da Rocha, Roldao
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Any connection between dark matter and extra dimensions can be cognizably evinced from the associated effective energy-momentum tensor. In order to investigate and test such relationship, a higher dimensional spacetime endowed with a factorizable general metric is regarded to derive a general expression for the stress tensor -- from the Einstein-Hilbert action -- and to elicit the effective gravitational potential. A particular construction for the case of six dimensions is provided, and it is forthwith revealed that the missing mass phenomenon may be explained, irrespective of the dark matter existence. Moreover, the existence of extra dimensions in the universe accrues the possibility of a straightforward mechanism for such explanation. A configuration which density profile coincides with the Newtonian potential for spiral galaxies is constructed, from a 4-dimensional isotropic metric plus extra-dimensional components. A Miyamoto-Nagai \emph{ansatz} is used to solve Einstein equations. The stable rotation curves associated to such system are computed, in full compliance to the observational data, without fitting techniques. The density profiles are reconstructed and compared to that ones obtained from the Newtonian potential.
description: 13 pages, 6 figures
Sensor Fusion-based Framework for Floor Localization
Creators: name: Haque, Fahimul
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Indoor positioning
subject: floor localization
subject: sensor fusion
subject: RSS
subject: barometric pressure.
subject: Engineering--Electronics and Electrical

description: Floor localization is at the heart of indoor positioning systems (IPSs) in multi-storey buildings with a variety of commercial, industrial, and health and safety applications. The prevalence of wireless technologies along with the integration of micro electro-mechanical sensors (e.g. barometers) in handheld devices and wearable gadgets of current vintage have prompted a surge in research and development efforts in the IPS area. Received signal strength (RSS), barometric altimetry (BA), and differential barometric altimetry (DBA) are three well-known methods of floor localization. However, the RSS-based methods lack the required accuracy, BA-based methods are prone to random errors due to local changes in the air pressure, e.g. from approaching weather systems, and DBA-based methods require installation of additional infrastructure (e.g. reference nodes and ad-hoc network for real-time information exchange). Fusion of BA and RSS is a viable solution for floor localization; nevertheless, available fusion algorithms are rather heuristic. In this dissertation, a theoretical framework is developed for fusing BA and Wi-Fi RSS measurements. The proposed framework involves a novel Monte Carlo Bayesian inference algorithm, for processing RSS measurements, and then fusion with BA using a Kalman Filter scheme. As demonstrated by our experimental results, the proposed sensor fusion algorithm achieves floor localization accuracy of 97% on average. The algorithm does not require new infrastructure, and has low computational complexity, hence, can be readily integrated into various state-of-the-art mobile devices.
Single crystal growth and superconductivity of Ca(Fe1-xCox)2As2
Creators: name: Hu, Rongwei
name: Ran, Sheng
name: Bud'ko, S. L.
name: Straszheim, W. E.
name: Canfield, P. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the single crystal growth of Ca(Fe1-xCox)2As2 (0 <= x <= 0.082) from Sn flux. The temperature-composition phase diagram is mapped out based on the magnetic susceptibility and electrical transport measurements. Phase diagram of Ca(Fe1-xCox)2As2 is qualitatively different from those of Sr and Ba, it could be due to both the charge doping and structural tuning effects associated with Co substitution.
description: 5 pages, 4 figures
Analysis of Genetic Divergence for Grain Yield and Grain Quality Traits in Bread Wheat (Triticum aestivum L.) Genotypes at Axum, Northern Ethiopia
Creators: name: Meles, Berhanu
name: Mohammed, Wassu
name: Tsehaye, Yemane
Publisher: name: Journal of Science and Sustainable Development
Year: 2018

description: This study was intended to assess genetic diversity for yield and grain quality traits at Axum Agricultural Research Center in 2016. Forty-nine wheat genotypes were tested using 7 x 7 triple- lattice design in which data were collected for 17 agronomic and grain quality traits. The near infrared transmittance (NIT Infratec 1241 Grain analyzer, Sweden) was used to analyze wheat samples for their protein, wet gluten, zeleny sedimentation and starch content on dry weight basis. The data were subjected to analysis of variance and exhibited significant difference among genotypes. New entries viz .ETBW8486, ETBW8480 and ETBW9016 produced grain yield ranged from 4.52 to 5.44 t ha-1 and protein content 13.1 to 14.67%, which are higher than the check variety (King bird= 4.38 t ha-1 with protein content=11.93% ). These genotypes were also early maturing than the check varieties, thus they might serve as good candidates for variety development. Genetic divergence estimated by squared distance (D2) and clustering conducted using Ward's method grouped the 49 bread wheat genotypes in to five clusters. Cluster mean values and squared distance showed that there is negative association between grain yield and grain quality traits. Hence, for the improvement of grain yield with grain quality, genotypes from cluster V and I might be crossed. PCA analysis also showed that the first five PC’s accounted for 80.12% of total variation and suggested these traits could be used as useful sources of genetic variation for future improvement. Generally, the information obtained from this study can be used to plan hybridization among potential genotypes to maximize genetic diversity and expression of heterosis for feature wheat improvement.
description: Journal of Science and Sustainable Development, Vol. 6 No. 1 (2018)
On-It Summer 2017 Calgary to Banff Transit Pilot … A Huge Success!
Creators: name: Calgary Regional Partnership
name: White, Richard
Publisher: name: Calgary Regional Partnership
Year: 2017
Subjects: regional transportation
videos
transportation

description: According to Mayor Karen Sorensen of Banff Alberta, “For the first time in our history, visitors from Calgary had the opportunity to travel to Banff on convenient, inexpensive and comfortable mass transit. We want to ensure this is the way of the future – that more and more visitors will choose to leave their private vehicles at home and hop on a bus, or a train, to travel to and within the Banff National Park and the Town. We were proud to partner with Parks Canada on this transit initiative and collaborate with Calgary Regional Partnership and Town of Canmore to bring On-It to Banff.”