cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Transport criticality of the first-order Mott transition in a quasi-two-dimensional organic conductor, $κ$-(BEDT-TTF)$_{2}$Cu[N(CN)$_{2}$]Cl
Creators: name: Kagawa, F.
name: Itou, T.
name: Miyagawa, K.
name: Kanoda, K.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: An organic Mott insulator, $κ$-(BEDT-TTF)$_{2}$Cu[N(CN)$_{2}$]Cl, was investigated by resistance measurements under continuously controllable He gas pressure. The first-order Mott transition was demonstrated by observation of clear jump in the resistance variation against pressure. Its critical endpoint at 38 K is featured by vanishing of the resistive jump and critical divergence in pressure derivative of resistance, $|\frac{1}{R}\frac{\partial R}{\partial P}|$, which are consistent with the prediction of the dynamical mean field theory and have phenomenological correspondence with the liquid-gas transition. The present results provide the experimental basis for physics of the Mott transition criticality.
description: 4 pages, 5 figures
Temperature-dependent mechanical properties of ZrC and HfC from first principles
Creators: name: Zhang, Jin
name: McMahon, Jeffrey M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In order to gain insight into the effect of elevated temperature on mechanical performance of ZrC and HfC, the temperature-dependent elastic constants of these two carbides have been systematically studied using two different methods (first-principles qusi-harmonic approximation and first-principles qusi-static approximation). Isoentropic C$_{11}$ gradually decrease and the isoentropic C$_{12}$ slightly increases for ZrC and HfC under temperature. While the isoentropic C$_{44}$ of both ZrC and HfC is insensitive to the temperature. In both ZrC and HfC cases, the decline of temperature-dependent C$_{11}$ calculated from QHA is more pronounced than from QSA. Temperature effects on modulus of elasticity, poisson's ratio, elastic anisotropy, hardness and fracture toughness are further explored and discussed. The results indicate that degradation of B, G and E estimated from QHA is more serious than these from QSA at high temperature. From room temperature to 2500 K, the theoretical decreasing slope (from QHA) of B, G, and E is 0.38 GPa$\cdot$K$^{-1}$, 0.30 GPa$\cdot$K$^{-1}$, and 0.32 GPa$\cdot$K$^{-1}$ for ZrC and 0.33 GPa$\cdot$K$^{-1}$, 0.29 GPa$\cdot$K$^{-1}$, and 0.30 GPa$\cdot$K$^{-1}$ for HfC.
The effect of climate change on rice production in Adamawa State, Nigeria
Utjecaj klimatskih promjena na proizvodnju riže u Adamawi, Nigerija
Creators: name: I. A. Adedeji
name: N. E. Tiku
name: P. R Waziri-Ugwu
name: S. O. Sanusi
name: I. A. Adedeji
name: N. E. Tiku
name: P. R Waziri-Ugwu
name: S. O. Sanusi
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Environmental Economics and Policy
subject: Nigeria
subject: climate change
subject: unit root
subject: regression analysis
subject: rice production

description: This study analyzes the effect of climate change on rice production in Adamawa State, Nigeria. The study describes the trend in rice production and determines the factors affecting the output of rice in Adamawa. Secondary data from 1990-2015 was used. The analytical tools used were descriptive analysis, unit root and regression analysis. The result of the study reveals that there is variation in the trend of the climatic factors affecting rice production in Adamawa State. The findings reveal that rainfall and minimum temperature are the major climatic factors that affect the rice production; such that 1% increase in rainfall leads to 22.2% increase in rice production and 1% increase in minimum temperature leads to 3.7% reduction in rice production. Therefore rainfall is found to be positively significant to rice output, while minimum temperature is found to be negatively significant. The study therefore recommends that irrigation facilities should be built, especially in the north where drought threatens food production. Also breeders should develop rice varieties that have less gestation period and can survive high temperature.
Understanding Scale Invariance in a Minimal Model of Complex Relaxation Phenomena
Creators: name: Hurtado, P. I.
name: Marro, J.
name: Garrido, P. L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report on the computer study of a lattice system that relaxes from a metastable state. Under appropriate nonequilibrium randomness, relaxation occurs by avalanches, i.e., the model evolution is discontinuous and displays many scales in a way that closely resembles the relaxation in a large number of complex systems in nature. Such apparent scale invariance simply results in the model from summing over many exponential relaxations, each with a scale which is determined by the curvature of the domain wall at which the avalanche originates. The claim that scale invariance in a nonequilibrium setting is to be associated with criticality is therefore not supported. Some hints that may help in checking this experimentally are discussed.
description: 9 pages, 6 figures
Surface Effects in Superconductors with Corners
Creators: name: Correggi, Michele
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We review some recent results on the phenomenon of surface superconductivity in the framework of Ginzburg-Landau theory for extreme type-II materials. In particular, we focus on the response of the superconductor to a strong longitudinal magnetic field in the regime where superconductivity survives only along the boundary of the wire. We derive the energy and density asymptotics for samples with smooth cross section, up to curvature-dependent terms. Furthermore, we discuss the corrections in presence of corners at the boundary of the sample.
description: Proceeding for XXI Congresso UMI 2019, final version, Boll. Unione Mat. Ital. to appear, 17 pages, pdfLaTeX
An Investigation into the Feasibility to Implement Rain Water Harvest in the new Student Union Building at UBC
Creators: name: Chen, Stanley
name: Thunman, Jennie
name: Xu, Elle
Publisher: name: The University of British Columbia
Year: 2010

description: 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.”
Four-loop vacuum energy density of the SU(N_c) + adjoint Higgs theory
Creators: name: Kajantie, K.
name: Laine, M.
name: Rummukainen, K.
name: Schroder, Y.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the dimensionally regularised four-loop vacuum energy density of the SU(N_c) gauge + adjoint Higgs theory, in the disordered phase. ``Scalarisation'', or reduction to a small set of master integrals of the type appearing in scalar field theories, is carried out in d dimensions, employing general partial integration identities through an algorithm developed by Laporta, while the remaining scalar integrals are evaluated in d = 3 - 2εdimensions, by expanding in ε<< 1 and evaluating a number of coefficients. The results have implications for the thermodynamics of finite temperature QCD, allowing to determine perturbative contributions of orders O(g^6 ln(1/g)), O(g^6) to the pressure, while the general methods are applicable also to studies of critical phenomena in QED-like statistical physics systems.
description: 30 pages
Trend analysis of crop productivity growth in Nigeria (1961-2014)
Analiza kretanja rasta proizvodnje poljoprivrednih kultura u Nigeriji (1961. –2014.)
Creators: name: I. A Adedeji
name: N. E Tiku
name: S.O Sanusi
name: P. R Waziri-Ugwu
name: I. A Adedeji
name: N. E Tiku
name: S.O Sanusi
name: P. R Waziri-Ugwu
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Marketing
subject: FOS: Economics and business
subject: total factor productivity
subject: trend analysis
subject: Malmquist Productivity index
subject: technical change

description: This paper focuses on trend analysis of crop productivity growth in Nigeria between 1961 and 2014. It was therefore intended to estimate the effect of different factors of production that influence crop output and to compute their technical efficiency, technological change and total factor productivity change. Panel data was broken into land, labour, tractor, fertilizer and animal power. Descriptive statistics, Cobb-Douglas production analysis and Malmquist Productivity index were the tools employed for the analysis. The result of the trend analysis shows that time has a positive effect on crop production and also shows that there is an increase in crop output, land, labour, tractor, fertilizer and animal power over years. Land and animal power are statistically significant at 1% probability level and a unit increase in land and animal power, crop output increases by 2.176772 tons and 0.7531192 tons respectively, this implies that land and animal power have a positive effect on crop output in Nigeria. Labour and tractor have negative impact on crop output, while fertilizer has no significant effect on crop output. The efficiency change, technical change and total factor productivity change were also analyzed. According to the analysis, Nigeria experienced the highest agricultural productivity from 1992, with value of 1.166. It is therefore recommended that the use of agricultural land should be increased, relevant policies should address the constraints to technology progress, and efficiency should be promoted in order to improve productivity growth.
A Sampling Strategy in Efficient Potential Energy Surface Mapping for Predicting Atomic Diffusivity in Crystals by Machine Learning
Creators: name: Toyoura, Kazuaki
name: Fujii, Takeo
name: Kanamori, Kenta
name: Takeuchi, Ichiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We propose a machine-learning-based (ML-based) method for efficiently predicting atomic diffusivity in crystals, in which the potential energy surface (PES) of a diffusion carrier is partially evaluated by first-principles calculations. To preferentially evaluate the region of interest governing the atomic diffusivity, a statistical PES model based on a Gaussian process (GP-PES) is constructed and updated iteratively from known information on already-computed potential energies (PEs). In the proposed method, all local energy minima (stable & metastable sites) and elementary processes of atomic diffusion (atomic jumps) are explored on the predictive mean of the GP-PES. The uncertainty of jump frequency in each elementary process is then estimated on the basis of the variance of the GP-PES. The acquisition function determining the next grid point to be computed is designed to reflect the impacts of the uncertainties of jump frequencies on the uncertainty of the macroscopic atomic diffusivity. The numerical solution of the master equation is here employed to readily estimate the atomic diffusivity, which enables us to design the acquisition function reflecting the centrality of each elementary process.
The origin of intergalactic thermonuclear supernovae
Creators: name: Kuranov, A. G.
name: Postnov, K. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The population synthesis method is used to study the possibility of explaining the appreciable fraction (20^+12_15%) of the intergalactic (no-host) type Ia supernovae observed in galaxy clusters (Gal-Yam ete al. 2003) by binary whote dwarf merginngs in the cores of globular clusters. In a typical globular cluster, the number of merging double white dwarfs is fount to be smaller than 10^{-13} per year per average cluster star during the entire evolution of the cluster, which is a factor of 3 higher than in a Milky-Way-type galaxy. From 5 to 30% of the merging white dwarfs are dynamically expelled from the cluster with barycenter velocities up to 150 km/s. SN Ia explosions during the mergers of binary white dwarfs in dense star clusters may account for \sim 1% of the total rate of SN Ia in the central parts of galaxy clusters if the baryon mass fraction in such star clusters is \sim 0.3%.
description: 8 pages, 3 figs. Astronomy Letters (in press)
An Investigation into Net Zero Water Usage and Water Reduction for the Proposed Student Union Building
Creators: name: Leung, Arthur
name: Liew, Jian
name: Tonner, Brendan
name: Wan, James
Publisher: name: The University of British Columbia
Year: 2010

description: 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: The Effect of Altitude and Environmental Variables on Butterfly Activity in Puerto Rico
Creators: name: Bain, Robin F.
Publisher: name: The Open University
Year: 2010

description: The focus of this research project was at 735m and above 915m within the cloud forest on El Yunque Peak in the Luquillo Experimental Forest (LEF) in Puerto Rico. From 2001 to 2005, numbers of Calisto nubila encountered on El Yunque Peak decreased between 915m and 1000m, while numbers of C. nubila recorded along the Tradewinds trail between 735m and 765m increased. A climate anomaly was recorded on the peaks of the LEF by the climate data between May and September 2001. This was reflected in numbers of C. nubila encountered on El Yunque peak above 915m in the following field visit in 2002. Numbers of C. nubila on El Yunque Peak had not recovered by 2005.

Calculations using the general linear model on the Tradewinds trail 2003 data showed that all the climate variables had a close relationship with C. nubila numbers encountered between 735m and 765m. Because all the climate variables had a close relationship with each other as well as with C. nubila numbers, no single climate variable on its own had a close relationship with numbers encountered. The timing of the transect walks also had a close relationship with C. nubila numbers encountered on the Tradewinds trail. Annual precipitation in the preceding 365 days is shown to be a controlling mechanism on C. nubila population numbers on the Tradewinds trail by possibly acting on immature stages and foodplant condition at this site.

Numbers of C. nubila encountered on the 965m to 1000m El Yunque Peak transect had a close relationship with wind speed. Calisto nubila numbers also had a close relationship with the other climate variables combined.

The results show that C. nubila can be used as a biological indicator of climate change in forest ecosystems above 735m.
The impact of socioeconomic parameters on students’ attitudes about health and nutrition
Utjecaj sociodemografskih obilježja na percepcije studenata o zdravlju i prehrani
Creators: name: Ružica Lončarić
name: Jelić, Sanja
name: Tolušić, Zrinka
name: Ružica Lončarić
name: Jelić, Sanja
name: Tolušić, Zrinka
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Farm Management
subject: Food Consumption/Nutrition/Food Safety
subject: students
subject: nutrition
subject: health
subject: socio-demographic characteristics

description: Changes in nutritional habits of individuals, including students, occur not only due to age or change of residence (leaving the family home), but also because of different external factors and global trends in a balanced and varied diet. Foods of high nutritional value, i.e. balanced and varied food, become the basis of health care. The aim of the study is to determine students’ attitudes about nutrition and health, and the influence their socio-demographic characteristics have on their perception of health and nutrition. The survey was conducted on students (N = 384) by a questionnaire. The study found that the majority of students perceive that they have enough knowledge about health and "healthy" nutrition, and this knowledge is primarily acquired through the Internet. The place of residence, or the act of leaving the family home and starting an independent life, reduces the consumption of healthy eating, while a higher economic status, i.e. students’ higher financial budget, increases opportunities to consume food in a proper way. Most of the students living on a University campus believe that they had "healthier" nutrition pre–college and that they ate less unhealthy food at the family home. This fact should be an incentive for institutions, student homes and restaurants to act in such a way (through posters, workshops, seminars, more diverse menus, etc.) as to encourage students to learn more about the connection between food and health.
Do working conditions influence the choice of meal at work?
Jesu li radni uvjeti povezani s odabirom kuhane hrane tijekom radnog vremena?
Creators: name: Tomić, Marina
name: Korda, Lucija
name: Zrakić, Magdalena
name: Željka Mesić
name: Tomić, Marina
name: Korda, Lucija
name: Zrakić, Magdalena
name: Željka Mesić
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: working conditions
subject: people at work
subject: cooked food
subject: behaviour

description: The aim of this paper is to determine the persistence of the relationship between working conditions and the behavior of employees in consuming cooked meals during working hours. An on-line survey was conducted on a sample of 206 employees. The results show that over 60% of respondents do not consume cooked food during working hours. Employees of private companies who work desk jobs and those who spend more than 10 hours at work eat cooked food in a greater proportion during working hours. The research results are important for caterers who provide or plan to provide cooked meals as they offer insights into consumer behavior in the context of food consumption during working hours. Moreover, they are important for health policy makers as they help them design and implement campaigns to increase the consumption of cooked food at work.
title: The Role of the Ubiquitin Proteasome Pathway in Papillomavirus Pathogenicity
Creators: name: Tomaić, Vjekoslav
Publisher: name: The Open University
Year: 2009

description: To establish an infection in the host cell, Papillomaviruses (PVs) encode two major oncoproteins, E6 and E7, which interact with numerous cellular proteins and interfere with many cellular pathways. We use HPV E6 and RhPV-1 E7 oncoproteins as tools to investigate some of the most important characteristics of the high-risk HPV E6 proteins: their association with the ubiquitin pathway and ability to direct proteasomal degradation of PDZ domain-containing proteins. We show that E6 protein levels are dependent on the E6AP ubiquitin ligase: in its absence, E6 is degraded in a proteasome dependent manner. A proteomic analysis for HPV-18 E6 interacting partners showed that HPV-18 E6 interacts with EDD, another HECT domain ubiquitin ligase. EDD does not direct the degradation of p53 or PDZ domain-containing substrates, but appears to regulate E6AP levels, with consequent effects on E6 protein levels and its p53 targeting. These studies demonstrate a complex interplay between E6, EDD and E6AP for regulating E6’s degradation of its substrate proteins. Rhesus papillomavirus 1 (RhPV-1) is a high-risk mucosal papillomavirus, but its E6 protein has no PDZ-binding motif. However, we show a remarkable evolutionary conservation, with the PDZ-binding motif present on the RhPV-1 E7 protein instead. Furthermore, this directs the binding of RhPV-1 E7 to Par3, a PDZ domain-containing protein controlling the polarity regulation pathway also controlled by hDlg and hScrib, the PDZ domain-containing targets of HPV-18 and HPV-16 E6. RhPV-1 E7 degrades Par3 analogously to HPV E6’s degradation of its PDZ substrates, and also appears to interact with EDD. These studies demonstrate that PDZ domain-containing cell polarity regulators and critical components of the ubiquitin proteasome pathway are common targets of evolutionarily diverse oncogenic mucosal papillomaviruses. This suggests that these pathways represent essential steps in the viral life cycles and in these viruses’ ability to induce malignancy.
Trap-induced resonances in controlled collisions of cesium atoms
Creators: name: Stock, Rene
name: Deutsch, Ivan H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the feasibility of observing a trap-induced resonance [Stock et al., Phys. Rev. Lett. 91, 183201 (2003)] for the case of two 133Cs atoms, trapped in separated wells of a polarization-gradient optical lattice, and interacting through a multichannel scattering process. Due to the anomalously large scattering length of cesium dimers, a strong coupling can occur between vibrational states of the trap and a weakly bound molecular state that is made resonant by the ac-Stark shift of the lattice. We calculate the energy spectrum of the two-atom system as a function of the distance between two potential wells by connecting the solutions of the Schroedinger equation for the short-range molecular potential to that of the long-range trap in a self-consistent manner. The short-range potential is treated through a multichannel pseudopotential, parametrized by the K matrix, calculated numerically for atoms in free space in a close-coupling approximation. This captures both the bound molecular spectrum as well as the energy-dependent scattering for all partial waves. We establish realistic operating conditions under which the trap-induced resonance could be observed and show that this strong and coherent interaction could be used as a basis for high-fidelity two-qubit quantum logic operations.
description: 9 pages, 8 figures, 1 table
GAPDH controls extracellular vesicle biogenesis and enhances the therapeutic potential of EV mediated siRNA delivery to the brain
Creators: name: Dar, Ghulam Hassan
name: Mendes, Cláudia C.
name: Kuan, Wei-Li
name: Speciale, Alfina A.
name: Conceição, Mariana
name: Görgens, André
name: Uliyakina, Inna
name: Lobo, Miguel J.
name: Lim, Wooi F.
name: EL Andaloussi, Samir
name: Mäger, Imre
name: Roberts, Thomas C.
name: Barker, Roger A.
name: Goberdhan, Deborah C. I.
name: Wilson, Clive
name: Wood, Matthew J. A.
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Article
/631/61/391/3932
/631/80/86/820
/13
/13/89
/14
/38
/42
/42/89
/59
/59/5
/64
/64/60
article

description: Abstract: Extracellular vesicles (EVs) are biological nanoparticles with important roles in intercellular communication, and potential as drug delivery vehicles. Here we demonstrate a role for the glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) in EV assembly and secretion. We observe high levels of GAPDH binding to the outer surface of EVs via a phosphatidylserine binding motif (G58), which promotes extensive EV clustering. Further studies in a Drosophila EV biogenesis model reveal that GAPDH is required for the normal generation of intraluminal vesicles in endosomal compartments, and promotes vesicle clustering. Fusion of the GAPDH-derived G58 peptide to dsRNA-binding motifs enables highly efficient loading of small interfering RNA (siRNA) onto the EV surface. Such vesicles efficiently deliver siRNA to multiple anatomical regions of the brain in a Huntington’s disease mouse model after systemic injection, resulting in silencing of the huntingtin gene in different regions of the brain.
Pseudoliropus Guerra-García & Ahyong 2020, gen. nov.
Creators: name: Guerra-García, José M.
name: Ahyong, Shane T.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Caprellinoididae
Pseudoliropus

description: Pseudoliropus gen. nov.
http://zoobank.org/NomenclaturalActs/ 904A1ABE-2698-40DE-A5B4-CC26549DF905
 Diagnosis. Antenna 1 flagellum with more than 2 articles. Antenna 2 flagellum 2-articulate, swimming setae absent. Pereonites 3 and 4 with gills. Pereopods 3 and 4 uniarticulate. Pereopod 5 3-articulate. Pereopods 6 and 7 6-articulate. Mandible molar absent; mandible palp 2-articulate. Abdomen without appendages.
 Type species. Pseudoliropus keablei sp. nov.
 Etymology. The new genus superficiallY resembles the genus Liropus. The name is, therefore, composed of Pseudo - (=not genuine) and Liropus. Gender: masculine.
description: Published as part of Guerra-García, José M. & Ahyong, Shane T., 2020, A New Genus and Two New Species of Caprellidae (Crustacea: Amphipoda) from Mesophotic and Deep-sea Waters of Australia, pp. 45-62 in Records of the Australian Museum 72 (2) on page 47, DOI: 10.3853/j.2201-4349.72.2020.1764, http://zenodo.org/record/4654355
A CRITICAL REVIEW OF NIGERIA'S NATIONAL HOUSING POLICY: EVOLUTION, STATE, AND EMERGING CHALLENGES
Creators: name: Abdulrazaq, Ibrahim Musa
Publisher: name: NOLAND JOURNALS
Year: 2024
Subjects: Urbanization, Policy, Housing, Maintenance, Overcrowding, Homelessness

description: This paper aimed to review the state, evolutionary trends and challenges of national housing policy in Nigeria. Housing policy is considered as a tool for national development. The paper constitutes three segments, where the first segment expressed state of housing policy in Nigeria which encompasses addressing fundamental issues like land ownership, housing finance, housing construction and delivery. Evolutionary trends of housing policy and developmental stages in all regime of government were presented in the second segment. In addition, the third segment assessed and identified the problems that are associated with the implementation of housing policies in Nigeria which might include but not limited to poor administration, inadequate funding, insufficient infrastructural amenities, as well as inadequate housing finance. It is therefore suggested that there is need for periodic review of the housing policies, efficient financing and effective implementation of housing policies should be adopted by the government at all levels. Also the use of local materials should be encouraged as well as the provision of low cost houses in urban and rural places should be employed for national development.
MEGA: Merger graphs of structure formation
Creators: name: Roper, William J.
name: Thomas, Peter A.
name: Srisawat, Chaichalit
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: When following the growth of structure in the Universe, we propose replacing merger trees with merger graphs, in which haloes can both merge and split into separate pieces. We show that this leads to smoother mass growth and eliminates catastrophic failures in which massive haloes have no progenitors or descendants. For those who prefer to stick with merger trees, we find that trees derived from our merger graphs have similar mass growth properties to previous methods, but again without catastrophic failures. For future galaxy formation modelling, two different density thresholds can be used to distinguish host haloes (extended galactic haloes, groups and clusters) from higher-density subhaloes: sites of galaxy formation.
The Retailer Choice of SNAP Participants for Fill-In Purchases
Creators: name: Melo, Grace
name: Rabinowitz, Adam
name: Liu, Yizao
name: Ver Ploeg, Shelly
name: Melo, Grace
name: Rabinowitz, Adam
name: Liu, Yizao
name: Ver Ploeg, Shelly
Publisher: name: Unknown
Year: 2018
Subjects: Agricultural and Food Policy

description: The publication is restricted until USDA approval.
Cyclone Vulnerability and Coping Strategies of Coastal Community: Village Level Assessment in Bangladesh
Creators: name: MT Islam
name: Md. Shahin
name: AA Biswas
Publisher: name: figshare
Year: 2020
Subjects: subject: Uncategorized
subject: 111708 Health and Community Services
subject: FOS: Health sciences

description: One of the most devastating climatic hazard ‘cyclone’ hit coastal zone of Bangladesh more or less every two to three years; damaging physical infrastructure, loss of life and livelihood, property damage, disruption of social system, economy loss. Nisanbaria union of Taltoliupazila under Barguna district is adjacent to Bay of Bengal that’s why during any kind of depression into the sea will hit this coastal area in a medium or large scale. This study focuses on assessment of cyclone vulnerability by analyzing community present situation and to assess the coping strategies by analyzing their past experience. For conducting this research both primary and secondary data are collected to fulfil the objectives. Factors that increase the vulnerability of local community includes location, economic condition, house pattern, lack of road connectivity, insufficient cyclone shelter, dependency ratio, lack of awareness etc. The coping strategies includes taking shelter in safe place, livelihood diversification, using indigenous knowledge in cyclone warning, getting relief from local GOs and NGOs etc. The GOs and NGOs should take action for reducing the vulnerability like construction of new cyclone shelter, improved road connectivity, construction of embankment, giving priority of peoples indigenous practice, raising awareness of local community to cope with the cyclone.
Quasi-Moessbauer effect in two dimensions
Creators: name: Dietrich, Dennis D.
name: Hirst, Lester L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Expressions for the absorption spectrum of a nucleus in a three- and a two-dimensional crystal respectively are obtained analytically at zero and at finite temperature respectively. It is found that for finite temperature in two dimensions the Moessbauer effect vanishes but is replaced by what we call a Quasi-Moessbauer effect. Possibilities to identify two-dimensional elastic behavior are discussed.
description: 18 pages, 5 figures, notation simplified
Oxen, Agricultural Productivity and Farm Income in Nicaragua
Creators: name: Garcia-Fuentes, Pablo A.
name: Fukasawa, Fukasawa
name: Rodriguez Martinez, Edgar A.
name: Vargas, Conney
name: Mireles, Rodrigo
name: Garcia-Fuentes, Pablo A.
name: Fukasawa, Fukasawa
name: Rodriguez Martinez, Edgar A.
name: Vargas, Conney
name: Mireles, Rodrigo
Publisher: name: Unknown
Year: 2018
Subjects: subject: Community/Rural/Urban Development
subject: Food Security and Poverty
subject: International Development
subject: Agricultural productivity
subject: farm income
subject: oxen
subject: Nicaragua

description: This research uses survey data to assess the effect of oxen as draft animals on agricultural productivity and farm agricultural income in Nicaragua. The results show that farms that use oxen to plow the land have higher productivity of beans than farms that use stick to plant crops. On average, using oxen increases farm’s beans output by 7.75 100-pound bags of beans, and hiring oxen increases farm’s beans output by 8.5 100-pound bags of beans. Farms that use oxen or hire oxen to plow the land have more planted area. The impact of using oxen to plow the land through farm planted area on farm agricultural gross income is 18.13 percent, and the impact of hiring oxen to plow the land through farm planted area on farm agricultural gross income is 25.55 percent.
Production of amino-functionalised condensed tannins via a single step conversion using supercritical fluid processing
Creators: name: Grigsby, Warren J.
name: Steward, Diane
name: Franich, Robert A.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology

description: Amphoteric aminophenol compounds have diverse synthetic and industrial use due to their multi-functional chemical reactivity. In this study, the synthesis of amphoteric flavonoid compounds via chemical modification with sub- and supercritical ammonia was explored. Both product formation and degree of amination of both catechin and condensed tannins were dependent on the processing conditions employed. Applying subcritical ammonia conditions produced ammonium ion formation and polymerization of these flavonoids. Under these conditions, ammonium group hydrogen-bonding was determined at the flavonoid B-ring catechol group and characterized by the δNH4+ bending at 1400 cm−1 in FTIR spectra. In contrast, using supercritical ammonia conditions (150 °C, 115 bar) led to formation of the desired amine-substituted products. Characterization of the aminated catechin and tannin products confirmed hydroxyls of the flavanyl A-ring were substituted to –NH2. FTIR established C-NH2 bond formation (1550, 1250 cm−1) with %N and NMR indicating stoichiometric substitutions of hydroxyl groups at the C5 and C7 flavonoid A-ring positions. Moreover, under supercritical ammonia conditions, there was a reduced tendency for the undesired base-catalysed autocondensation observed at lower temperatures and pressures.
title: Climate Change and Copepod Size Distribution: Comparison of Two Coastal Long-Term Series in the Western Mediterranean Sea
Creators: name: Rubio, Carmen Garcia-Comas
Publisher: name: The Open University
Year: 2010

description: This thesis was aimed at investigating long-term dynamics of zooplankton communities in relation to climate change. It represents a pioneer study in comparing Mediterranean time series with a standardised methodology, i.e., the ZooScan, a digital imaging system for counting and sizing mesozooplankton from preserved samples. This study has proven that copepod size spectra (i.e., histogram of organisms arranged by size classes) obtained with the ZooScan is a powerful synthetic index to monitor changes in the pelagic system. Copepod abundance and size spectra were analyzed in the zooplankton time series conducted at stn MC (Gulf of Naples, Tyrrhenian Sea) and Point B (Villefranche Bay, Ligurian Sea) for the years 1986-2005 and 1974-2003, respectively. In both time series, the proportion of large individuals in the copepod community increased over the years, with a shift in the early 1990s at stn MC and in 1987 at Point B. In both cases, the 1990s copepod reproduction might have decreased due to earlier and stronger stratification driven by rising temperature. At stn MC, the shift to dominance of small phytoplankton cells in the 1990s seemed to be the direct cause. At Point B, in addition to the detrimental effect of earlier stratification in the 1990s, the 1980s seemed to be very productive due to strong winter convection driven by cool salty winters. High salinity was related to low winter atmospheric pressure linked to the North Atlantic Oscillation (+ winter NAO). In both locations, the frequency of occurrence of typical offshore species increased over the years, suggesting changes in coastal-offshore interactions. Mechanisms controlling the copepod communities in both sites seem to be different. Stn MC has a more coastal character than Point B and thus the former is more affected by local conditions as terrestrial nutrient inputs. At Point B, stratification-destratification dynamics seem to control production.
A Cosmic Lattice as the Substratum of Quantum Fields
Creators: name: Fagundes, Helio
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A cosmology inspired structure for phase space is introduced, which leads to finitization and lattice-like discretization of position and momentum eigenvalues in a preferred, cosmic frame. Lorentz invariance is broken at very high energies, at present inaccessible. The divergent perturbation terms in quantum electrodynamics become finite and small; this could become a requirement leading to model restrictions in other perturbative theories. So the very success of the usual renormalization procedures is simply explained by their finitization, and is viewed as indicating the reality of the lattice.
description: Published in 1989; now with corrections. A sequel is in preparation. Fourth version with a few new corrections
Role of low-$l$ component in deformed wave functions near the continuum threshold
Creators: name: Yoshida, Kenichi
name: Hagino, Kouichi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The structure of deformed single-particle wave functions in the vicinity of zero energy limit is studied using a schematic model with a quadrupole deformed finite square-well potential. For this purpose, we expand the single-particle wave functions in multipoles and seek for the bound state and the Gamow resonance solutions. We find that, for the $K^π=0^{+}$ states, where $K$ is the $z$-component of the orbital angular momentum, the probability of each multipole components in the deformed wave function is connected between the negative energy and the positive energy regions asymptotically, although it has a discontinuity around the threshold. This implies that the $K^π=0^{+}$ resonant level exists physically unless the $l=0$ component is inherently large when extrapolated to the well bound region. The dependence of the multipole components on deformation is also discussed.
Advanced pattern recognition techniques for wave-based structural health monitoring of metallic panels
Creators: name: Ebrahimkhanlou, Arvin
name: 0000-0002-0740-5807
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Guided ultrasonic imaging
Acoustic emission
Uncertainty quantification
Pattern recognition
Deep learning
Edge reflection
Reverberation patterns
Plate-like structures
Stacked autoencoders
Guided ultrasonic waves
Machine learning
Structural health monitoring

description: Increasing loads on aging and deteriorating aerospace and naval structures, such as airplanes and marine vessels, their usage beyond the designed life, and the desire to reduce the downtime associated with their regular maintenance operations have all motivated research on structural health monitoring (SHM) methods. Among SHM methods, those based guided ultrasonic waves, which are excited and received by low-profile piezoelectric transducers, are one of the most promising candidates for detecting, localizing, and characterizing structural defects. Despite the significant development of these SHM systems, very few, if any, have been implemented in real structures. One major reason for this limited implementation is due the difficulty of the processing and interpreting the reverberation patterns of guided ultrasonic waves. Such reverberations are due to multiple reflections of the waves from structural and geometrical features, such as boundaries, stiffeners, and fasteners. Therefore, the primary goal of this research is to overcome this challenge by advancing pattern recognition techniques and analyzing the patterns of edge-reflected guided-ultrasonic reverberations in thin metallic panels. The objective is to leverage such patterns to improve the accuracy of current damage localization algorithms and reduce the number of required sensors. Specifically, two damage localization modes are considered: active ultrasonic imaging and passive acoustic emission. However, this dissertation gives more weight to the latter. For both active and passive modes, an analytical model are developed to simulate the patterns of edge-reflected, guide-ultrasonic reverberations. For the passive mode, a probabilistic framework is also developed to quantify the systematic uncertainties associated with this reflection-based localization approach. In addition, deep learning based, data-driven approaches are used to extend the application of the passive mode to metallic panels with rivet-connected stiffeners and allow characterizing the defects. For validation, experiments are conducted on rectangular aluminum panels with square-cut edges. The results show the effectiveness of the developed pattern recognition approaches in detecting, localizing, and characterizing structural defects, such as simulated fatigue cracks, with significantly fewer number of sensors. The knowledge gained in this investigation contributes to the condition awareness of metallic panels
Farmland Lease, High-Rent Threat, and Contract Instability: Evidence from China
Creators: name: Zhu, Wenjue
name: Luo, Biliang
name: Paudel, Krishna
name: Zhu, Wenjue
name: Luo, Biliang
name: Paudel, Krishna
Publisher: name: Unknown
Year: 2018
Subjects: subject: Farm Management
subject: Institutional and Behavioral Economics
subject: Risk and Uncertainty
subject: Contract Instability
subject: Farmland Lease
subject: High-Rent Threat
subject: Large Landholder

description: We develop a game theoretical model to understand the stability problem in the farmland lease contract in China where most land-owners are small landholders. When these small land-owners lease their land to large landholders, they take a high-rent-threaten strategy that can result in contract instability. Results obtained from doubly-robust estimation used on randomly selected interview data from 1611 households in nine provinces in China indicate that, (1) compared to those land-owners who transfer the farmland to the small landholders, the land-owners who transfer the farmland to large landholders will have a higher 46.57% possibility to ask for higher rent in the contract duration (high-rent-threaten strategy); (2) land-owners’ high-rent-threaten strategy will increase 4.49% possibility of the contract breaks; (3) in general, compared with those contracts that the transfer objects are not large landholders, the contracts that the transfer objects are large landholders has a 6.81% higher possibility of breakdown; (4) if we isolate the influence of land-owners’ high-rent-threaten strategy on the contract break, the contracts that the transfer objects are large landholders still has a 5.65% higher possibility of breakdown. The empirical results entail that, comparing to the stable farmland lease contract between two small farmers, contract instability can arise endogenously when large landholders lease farmlands. We conclude that a suitable rent control regime may be necessary to promote a large scale farmland transfer in China.
Rotational states of Bose gases with attractive interactions in anharmonic traps
Creators: name: Lundh, Emil
name: Collin, Anssi
name: Suominen, Kalle-Antti
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: A rotated and harmonically trapped Bose gas with attractive interactions is expected to either remain stationary or escape from the trap. Here we report that, on the contrary, in an anharmonic trapping potential the Bose gas with attractive interactions responds to external rotation very differently, namely through center-of-mass motion or by formation of vortices, depending on the strengths of the interaction and the anharmonic term in the trapping potential.
description: 10 pages, 2 eps figures. Small alterations in reply to second referee report
Hawking radiation in optics and beyond
Creators: name: Aguero-Santacruz, Raul
name: Bermudez, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Hawking radiation was originally proposed in astrophysics, but it has been generalized and extended to other physical systems receiving the name of analogue Hawking radiation. In the last two decades, several attempts have been made to measure it in a laboratory, one of the most successful systems is in optics. Light interacting in a dielectric material causes an analogue Hawking effect, in fact, its stimulated version has already been detected and the search for the spontaneous signal is currently ongoing. We briefly review the general derivation of Hawking radiation, then we focus on the optical analogue and present some novel numerical results. Finally, we call for a generalization of the term Hawking radiation.
description: 20 pages, 8 figures, 64 references. Contribution to: "The next generation of analogue gravity experiments" at the Royal Society on December 2019
Production of amino-functionalised condensed tannins via a single step conversion using supercritical fluid processing
Creators: name: Grigsby, Warren J.
name: Steward, Diane
name: Franich, Robert A.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology

description: Amphoteric aminophenol compounds have diverse synthetic and industrial use due to their multi-functional chemical reactivity. In this study, the synthesis of amphoteric flavonoid compounds via chemical modification with sub- and supercritical ammonia was explored. Both product formation and degree of amination of both catechin and condensed tannins were dependent on the processing conditions employed. Applying subcritical ammonia conditions produced ammonium ion formation and polymerization of these flavonoids. Under these conditions, ammonium group hydrogen-bonding was determined at the flavonoid B-ring catechol group and characterized by the δNH4 + bending at 1400 cm−1 in FTIR spectra. In contrast, using supercritical ammonia conditions (150 °C, 115 bar) led to formation of the desired amine-substituted products. Characterization of the aminated catechin and tannin products confirmed hydroxyls of the flavanyl A-ring were substituted to –NH2. FTIR established C-NH2 bond formation (1550, 1250 cm−1) with %N and NMR indicating stoichiometric substitutions of hydroxyl groups at the C5 and C7 flavonoid A-ring positions. Moreover, under supercritical ammonia conditions, there was a reduced tendency for the undesired base-catalysed autocondensation observed at lower temperatures and pressures.