cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Note on characterizations of projective spaces
Creators: name: Chen, Jiun-Cheng
name: Tseng, Hsian-Hua
Publisher: name: arXiv
Year: 2005
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove a numerical characterization of $\mathbb{P}^n$ for varieties with at worst isolated local complete intersection quotient singularities. In dimension three, we prove such a numerical characterization of $\mathbb{P}^3$ for normal $\mathbb{Q}$-Gorenstein projective varieties.
description: Revised introduction, stronger result in dimension three presented
ประชาชนกับการมีส่วนร่วมต่อการเมืองการปกครองในท้องถิ่น
Creators: name: ศักดา พลเข้ม
Publisher: name: มหาวิทยาลัยมหาจุฬาลงกรณราชวิทยาลัย วิทยาเขตนครสวรรค์
Year: 2021
Subjects: ประชาชน
การมีส่วนร่วม
การเมืองการปกครองในท้องถิ่น

description: The Journal of Research and Academics, 4, 2, 269-282
No evidence for Dark Energy Metamorphosis ?
Creators: name: Jonsson, J.
name: Goobar, A.
name: Amanullah, R.
name: Bergstrom, L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent attempts to fit Type Ia supernova data by modeling the dark energy density as a truncated Taylor series have suggested the possibility of metamorphosis, i.e., a rapidly evolving equation of state parameter, w_DE(z). However, we show that fits using that parametrization have significant problems: evolution of w_DE(z) is both favoured and in some sense forced, and the equation of state parameter blows up or diverges in large regions of the parameter space. To further elucidate these problems we have simulated sets of supernova data in a Lambda-universe to show that the suggested ``evidence'' for metamorphosis is also common for w_DE=-1.
description: 12 pages, 5 figures, Minor revisions to match version accepted in Journal of Cosmology and Astroparticle Physics
ภาวะผู้นำแบบโลกาภิวัตน์
Creators: name: ภาราดร แก้วบุตรดี
Publisher: name: มหาวิทยาลัยมหาจุฬาลงกรณราชวิทยาลัย วิทยาเขตนครสวรรค์
Year: 2021
Subjects: ภาวะผู้นำ
โลกาภิวัตน์

description: The Journal of Research and Academics, 4, 2, 283-296
SetRank: A Setwise Bayesian Approach for Collaborative Ranking from Implicit Feedback
Creators: name: Wang, Chao
name: Zhu, Hengshu
name: Zhu, Chen
name: Qin, Chuan
name: Xiong, Hui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The recent development of online recommender systems has a focus on collaborative ranking from implicit feedback, such as user clicks and purchases. Different from explicit ratings, which reflect graded user preferences, the implicit feedback only generates positive and unobserved labels. While considerable efforts have been made in this direction, the well-known pairwise and listwise approaches have still been limited by various challenges. Specifically, for the pairwise approaches, the assumption of independent pairwise preference is not always held in practice. Also, the listwise approaches cannot efficiently accommodate "ties" due to the precondition of the entire list permutation. To this end, in this paper, we propose a novel setwise Bayesian approach for collaborative ranking, namely SetRank, to inherently accommodate the characteristics of implicit feedback in recommender system. Specifically, SetRank aims at maximizing the posterior probability of novel setwise preference comparisons and can be implemented with matrix factorization and neural networks. Meanwhile, we also present the theoretical analysis of SetRank to show that the bound of excess risk can be proportional to $\sqrt{M/N}$, where $M$ and $N$ are the numbers of items and users, respectively. Finally, extensive experiments on four real-world datasets clearly validate the superiority of SetRank compared with various state-of-the-art baselines.
description: This paper has been accepted in AAAI'20
Efficient analysis in planet transit surveys
Creators: name: Schwarzenberg-Czerny, A.
name: Beaulieu, J. -Ph.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: With the growing number of projects dedicated to the search for extrasolar planets via transits, there is a need to develop fast, automatic, robust methods with a statistical background in order to efficiently do the analysis. We propose a modified analysis of variance (AoV) test particularly suitable for the detection of planetary transits in stellar light curves. We show how savings of labor by a factor of over 10 could be achieved by the careful organization of computations. Basing on solid analytical statistical formulation, we discuss performance of our and other methods for different signal-to-noise and number of observations.
description: 7 pages, to be published in MNRAS, downloadable software from http://www.camk.edu.pl/~alex/#software
บทวิจารณ์หนังสือ มีวัดเป็นรมณีย์ มีกุฏิเป็นที่สบาย
Creators: name: พระสันต์ทัศน์ สินสมบัติ
Publisher: name: มหาวิทยาลัยมหาจุฬาลงกรณราชวิทยาลัย วิทยาเขตนครสวรรค์
Year: 2021
Subjects: วัด
กุฏิ
ความสบาย

description: The Journal of Research and Academics, 4, 2, 297-302
A drift-kinetic method for obtaining gradients in plasma properties from single-point distribution function data
Creators: name: Wetherton, Blake A.
name: Egedal, Jan
name: Montag, Peter K.
name: Le, Ari
name: Daughton, William S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In this paper, we derive a new drift-kinetic method for estimating gradients in the plasma properties through a velocity space distribution at a single point. The gradients are intrinsically related to agyrotropic features of the distribution function. This method predicts the gradients in the magnetized distribution function, and can predict gradients of arbitrary moments of the gyrotropic background distribution function. The method allows for estimates on density and pressure gradients on the scale of a Larmor radius, proving to resolve smaller scales than any method currently available to spacecraft. The model is verified with a set of fully-kinetic VPIC particle-in-cell simulations.
description: Accepted to Journal of Geophysical Research: Space Physics 14 pages, 5 figures
Collision of High Frequency Plane Gravitational and Electromagnetic Waves
Creators: name: Hogan, P. A.
name: Walsh, D. M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the head-on collision of linearly polarized, high frequency plane gravitational waves and their electromagnetic counterparts in the Einstein-Maxwell theory. The post-collision space-times are obtained by solving the vacuum Einstein-Maxwell field equations in the geometrical optics approximation. The head-on collisions of all possible pairs of these systems of waves is described and the results are then generalised to non-linearly polarized waves which exhibit the maximum two degrees of freedom of polarization.
description: Latex file, 17 pages, accepted for publication in International Journal of Modern Physics D
An investigation into solid waste accounting methods for the new SUB
Creators: name: Liaw, Daniel
name: Hsieh, Danny
name: Xiang, Lucie
name: Jiang, Veronica
Publisher: name: The University of British Columbia
Year: 2014

description: As part of UBC’s strives towards becoming a waste-free campus under the Climate Action Plan, the Alma Mater Society (AMS) is looking for best waste accounting practices to be implemented in the new SUB. This report looks at the different methods of waste accounting/auditing done at other campuses, suggests methods for conducting waste audits, and evaluates these methods using the triple bottom line assessment. The two methods suggested are: a manual method and a mechanized method. The triple bottom line assessment shows that the manual method is more cost-effective, and has a great potential to increase student involvement in UBC’s sustainability efforts and is hence recommended to be most suitable for the current context. However the mechanized method is suggested as a long-term solution as it presents promising environmental benefits of diverting waste from the landfill, which helps to fulfill UBC’s ultimate goal of a zero-waste campus. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Narrow Resonances in Effective Field Theory
Creators: name: Bedaque, P. F.
name: Hammer, H. -W.
name: van Kolck, U.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the power counting for effective field theories with narrow resonances near a two-body threshold. Close to threshold, the effective field theory is perturbative and only one combination of coupling constants is fine-tuned. In the vicinity of the resonance, a second, ``kinematic'' fine-tuning requires a nonperturbative resummation. We illustrate our results in the case of nucleon-alpha scattering.
description: 11 pages, revtex4, 3 ps figures
Frocasting Soybean Complex Prices: Univariate and Multivariate Time Series Models
Creators: name: Tinker, Jonathan N.
name: Gerlow, Mary E.
name: Irwin, Scott H.
name: Zulauf, Carl R.
name: Tinker, Jonathan N.
name: Gerlow, Mary E.
name: Irwin, Scott H.
name: Zulauf, Carl R.
Publisher: name: Unknown
Year: 1989
Subjects: Crop Production/Industries
Research Methods/ Statistical Methods

description: To forecast prices within the soybean complex, a univariate, ARIMA, time series model and a multivariate, VAR, time series model are constructed. An economic evaluation of these models provides evidence that the VAR model will offer greater opportunity for significant economic returns than will the use of an ARIMA model.
Artistic Liberties and the Story of Procris and Cephalus
Creators: name: Gilmore, Sarah E
name: Garrard, Mary D.
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as thesis option
Testing the Translog and Almost Ideal Specifications in Demand Systems
Creators: name: Alston, Julian M.
name: Chalfant, James A.
name: Rhamezani, Ahmand
name: Alston, Julian M.
name: Chalfant, James A.
name: Rhamezani, Ahmand
Publisher: name: Unknown
Year: 1991
Subjects: Demand and Price Analysis
Research Methods/ Statistical Methods

description: Using Lewbel' s framework, a demand system that nests both the almost ideal demand system and the translog demand system is estimated for United States meat consumption. Each special case is rejected. The implications of alternative specifications are then explored.
A Search for H-alpha Absorption in the Exosphere of the Transiting Extrasolar Planet HD 209458b
Creators: name: Winn, Joshua N.
name: Suto, Yasushi
name: Turner, Edwin L.
name: Narita, Norio
name: Frye, Brenda L.
name: Aoki, Wako
name: Sato, Bunei
name: Yamada, Toru
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is evidence that the transiting planet HD 209458b has a large exosphere of neutral hydrogen, based on a 15% decrement in Lyman-alpha flux that was observed by Vidal-Madjar et al. during transits. Here we report upper limits on H-alpha absorption by the exosphere. The results are based on optical spectra of the parent star obtained with the Subaru High Dispersion Spectrograph. Comparison of the spectra taken inside and outside of transit reveals no exospheric H-alpha signal greater than 0.1% within a 5.1A band (chosen to have the same Delta_lambda/lambda as the 15% Ly-alpha absorption). The corresponding limit on the column density of n=2 neutral hydrogen is N_2
description: To appear in PASJ [9 pages, 5 figures]. Minor corrections to match published version
Does the cosmological constant imply the existence of a minimum mass?
Creators: name: Boehmer, C. G.
name: Harko, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that in the framework of the classical general relativity the presence of a positive cosmological constant implies the existence of a minimal mass and of a minimal density in nature. These results rigorously follow from the generalized Buchdahl inequality in the presence of a cosmological constant.
description: 8 pages, no figures, accepted for publication in PLB
Magnetic Activity of F-, G-, and K-type Stars in the LAMOST-Kepler Field
Creators: name: Zhang, Jinghua
name: Bi, Shaolan
name: Li, Yaguang
name: Jiang, Jie
name: Li, Tanda
name: He, Han
name: Yu, Jie
name: Khanna, Shourya
name: Ge, Zhishuai
name: Liu, Kang
name: Tian, Zhijia
name: Wu, Yaqian
name: Zhang, Xianfei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Monitoring chromospheric and photospheric indexes of magnetic activity can provide valuable information, especially the interaction between different parts of the atmosphere and their response to magnetic fields. We extract chromospheric indexes, S and Rhk+, for 59,816 stars from LAMOST spectra in the LAMOST-Kepler program, and photospheric index, Reff, for 5575 stars from Kepler light curves. The log Reff shows positive correlation with log Rhk+. We estimate the power-law indexes between Reff and Rhk+ for F-, G-, and K-type stars, respectively. We also confirm the dependence of both chromospheric and photospheric activity on stellar rotation. Ca II H and K emissions and photospheric variations generally decrease with increasing rotation periods for stars with rotation periods exceeding a few days. The power-law indexes in exponential decay regimes show different characteristics in the two activity-rotation relations. The updated largest sample including the activity proxies and reported rotation periods provides more information to understand the magnetic activity for cool stars.
description: 8 pages,7 figures
Helicase activity on DNA as a propagating front
Creators: name: Bhattacharjee, Somendra M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Quantitative Biology (q-bio)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We develop a propagating front analysis, in terms of a local probability of zipping, for the helicase activity of opening up a double stranded DNA (dsDNA). In a fixed-distance ensemble (conjugate to the fixed-force ensemble) the front separates the zipped and unzipped phases of a dsDNA and a drive acts locally around the front. Bounds from variational analysis and numerical estimates for the speed of a helicase are obtained. Different types of helicase behaviours can be distinguished by the nature of the drive.
description: 5 pages, 5 eps figures; replaced by the published version
East is not East : The Works of Diasporic Artists Shirin Neshat and Shahzia Sikander
Creators: name: Naeem, Asma
name: Langa, Helen
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
SHAFOAT RAHMATULLO TERMIZIY SHEʼRIYATINING LINGVOPOETIK IMKONIYATLARI
Creators: name: Chorshanbiyeva Dilfuza, TerDu talabasi
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada o‘zbek tili leksikasining milliy, shakliy hamda uslubiy jihatlari Shafoat Rahmatullo Termiziy asarlari asosida tahlilga olingan. Nutq tovushlarining (aynan) undosh tovushlarning badiiy matnda poetik jihatdan qoʻllanishi, ularning takrorlanishi natijasida ham sodir boʻlishi lingvistik tahlilga olingan. Badiiy nutqning ohangdorligi va ta'sirchanligini ta'minlashga xizmat qiladigan fonopoetik vositalar ichida ana shunday tovushlar takrorining o'rni beqiyosligi asoslangan. She’riy matnlarda misralar, undagi soʻzlar hamda boʻgʻinlar boshida yoki oxirida bir xil undosh tovushlarning takror qo'llanishi oid misollar misollar asosida dalillangan.
The Old Musician : Manet's Novella of his Family in Crisis
Creators: name: Naeem, Asma
name: Broude, Norma
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as thesis option
title: SEDIMENT NITROGEN DYNAMICS IN BACKWATER WETLAND CONFLUENCES OF A REGULATED RIVER
Creators: name: DeGraves, Gina
Publisher: name: University of Kentucky Libraries
Year: 2022
Subjects: subject: FOS: Environmental engineering
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: As harmful algal blooms in regulated river systems have increased in the past decade, the importance of understanding sediment nutrients has also increased. Research linking nutrient processes and fine sediment dynamics to harmful algal blooms in confluence wetlands along regulated rivers has recently become apparent. However, the relationship between sediment nutrient dynamics in confluence wetlands has been understudied. Utilization of sediment fingerprinting, high-frequency water quality monitoring, and tracer unmixing mass-balance modeling, was able to suggest sediment N mineralization in Appalachia confluence riparian wetland was not a dominate source of nitrate downstream. Further measures of supplementary tracers and additional sediment sources were coupled with stable isotope unmixing modeling. The use of a dual-isotope unmixing method reduced uncertainty for majority of events where internal sediment sources were prominent. Potential sources are especially important to characterize when using stable isotope tracing techniques to continue the reduction of model uncertainty. Dual-isotope unmixing results process through mass-balance modeling demonstrated small tributaries may have larger depositional impacts on a confluence wetland rather than the localized regulated river, emphasizing the importance of nutrient reduction in small scale waterways. The use of this data significantly improves mass-balance unmixing modeling for confluence wetlands and implementation of floodplains in watershed management practices.
description: © 2022 Gina DeGraves
The role of cognitive vulnerability to depression on the relationship between sleep and cognitive-emotional functioning
Creators: name: Loucas, Caitlyn A.
Publisher: name: American University
Year: 2023

description: Although there is extensive literature exploring the impact of poor sleep on the cognitive and emotional dysregulation commonly found in depression disorders, research has not yet examined whether an individual’s level of cognitive vulnerability to depression (CV-D) moderates this relationship in the absence of high depressive symptoms. Increased sensitivity to poor sleep could represent one pathway through which vulnerable individuals progress into emergence of clinical depression. Ninety undergraduate college students with non-clinical depression scores reported their event appraisals, affect, and cognitions for one week using daily surveys. During this time, nightly sleep was recorded using Fitbit and ActiGraph devices. Results showed that, overall, cognitive vulnerability to depression did not moderate the relationship between sleep and cognitive-emotional functioning across most assessed outcome variables; however, where significant effects existed, individuals with higher levels of CV-D showed either no change or improvement in cognitive-emotional outcomes under conditions of poor sleep, compared to the uniformly poorer outcomes reported by their peers with low CV-D. This research highlighted the importance of understanding the interaction of daily sleep with an individual’s cognitive framework in order to predict cognitive-emotional functioning, especially in environments where disrupted sleep is common.
ESTIMATING ADOPTION BEHAVIOR FROM TIME OF ADOPTION DATA: THE CASE OF COMPUTERS IN CALIFORNIA
Creators: name: McWilliams, Bruce
name: Zilberman, David
name: McWilliams, Bruce
name: Zilberman, David
Publisher: name: Unknown
Year: 1991
Subjects: Labor and Human Capital
Research and Development/Tech Change/Emerging Technologies

description: Time of adoption as the variable representing technology adoption is preferable to a dichotomous adopt/not-adopt variable, since it provides insight into the diffusion process and indicates intensity of adoption. This paper develops a methodology for estimating the time of adoption and applies it to computer adoption in agriculture.
title: Directed evolution of Diels-Alderase ribozymes using in vitro compartmentalisation.
Creators: name: Agresti, Jeremy Jon
Publisher: name: The Open University
Year: 2006

description: Darwinian evolution in nature has produced many remarkable biocatalysts. By emulating the same processes in the laboratory there is great potential to produce catalysts that rival natural enzymes for efficiency, and are tailor made to the needs of science and industry. In addition, it may be possible to gain a deeper understanding of the evolutionary process itself. In vitro compartmentalization (IVC) has previously been used to evolve protein enzymes. In this thesis, I demonstrate how IVC can be applied to select RNA enzymes (ribozymes) for a property that has until now been unselectable: true intermolecular catalysis. Libraries containing up to 1011 ribozyme genes are compartmentalized in the aqueous droplets of a water-in-oil emulsion, such that most droplets contain no more than one gene, and transcribed in situ. By co-encapsulating the gene, RNA, and the substrates/products of the catalysed reaction, ribozymes can be selected for all enzymatic properties: substrate recognition, product formation, rate acceleration and turnover. Starting from a large random library of RNAs, a previous study using SELEX, which is based on selection for single-turnover, intramolecular reactions, yielded Diels-Alderase ribozymes which all contained the same catalytic motif. Selecting exactly the same library using IVC, in addition to ribozymes with the motif found in the SELEX study, it was possible to select Diels-Alderase ribozymes with a completely novel catalytic motif. All the selected ribozymes were capable of catalysing the reaction between dienes and dienophiles in solution in a truly bimolecular fashion and with multiple turnover. Interestingly, the catalytic properties of all the selected ribozymes were quite similar. The ribozymes are strongly product inhibited consistent with the Diels-Alder transition state closely resembling the product. More efficient Diels-AIderases may also need to catalyse a second reaction that transforms the product and prevents product inhibition.
An investigation into the use of cob and/or straw bale construction in non-residential buildings
Creators: name: Rezaiean-Asel, Armin
name: Lee, Joey
name: Lee, Kenneth
name: Nerpio, Justin
Publisher: name: The University of British Columbia
Year: 2014

description: The University of British Columbia (UBC) Farm regularly offers a variety of activities, learning experiences, and general community programs on its land and is therefore planning to construct a new “UBC Farm Centre” in order to meet the needs for additional space. The farm has decided to explore the possibility of building either a portion of the building, or the entire building, with cob and/or straw. In addition to conducting a triple-bottom line assessment, an analysis of three separate case studies was done to examine the successes and failures of previous cob and straw bale construction projects, before outlining findings from primary and secondary research. Primary research was conducted in the form of a survey that polled the views of over 200 individuals regarding certain questions that arose in the social consideration of cob and/or straw bale construction, discussed in more detail in section 5.0 of this report. As for secondary research, a number of academic journals and scientific reports were consulted when researching the benefits and drawbacks of using these alternative construction materials in the UBC Farm’s construction project. It was assumed that the cob and straw materials would be coming from a source near UBC and that the Farm would not be seeking cob or straw from any location outside of British Columbia. Another constraint that arose was that two of the case studies are of lodges, rather than purely non-residential buildings. The building principles involved in designing the infrastructures described in the case study section are similar to those that will apply to the UBC Farm Centre, due to size and purpose of the buildings. After the research was conducted and correlated, it became clear that both materials possessed a variety of environmental benefits versus traditional construction materials of wood and cement. They also proved to be more economically feasible, despite shorter life cycle than traditional construction materials, and provided positive social impact. Each material had its own strengths in terms of heat distribution, insulation, and other factors that will be mentioned in more detail throughout the report, but the final conclusion was to use straw bale for the exterior portion of the building while utilizing cob for the interior. 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.”
Noise spectroscopy of non-linear magneto optical resonances in Rb vapor
Creators: name: Martinelli, M.
name: Valente, P.
name: Failache, H.
name: Felinto, D.
name: Cruz, L. S.
name: Nussenzveig, P.
name: Lezama, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Nonlinear magneto-optical (NMO) resonances occurring for near-zero magnetic field are studied in Rb vapor using light-noise spectroscopy. With a balanced detection polarimeter, we observe high contrast variations of the noise power (at fixed analysis frequency) carried by diode laser light resonant with the 5S$_{1/2}(F=2) \to 5$P$_{1/2}(F=1) $ transition of $^{87}$Rb and transmitted through a rubidium vapor cell, as a function of magnetic field $B$. A symmetric resonance doublet of anti-correlated noise is observed for orthogonal polarizations around $B=0 $ as a manifestation of ground state coherence. We also observe sideband noise resonances when the magnetic field produces an atomic Larmor precession at a frequency corresponding to one half of the analysis frequency. The resonances on the light fluctuations are the consequence of phase to amplitude noise conversion owing to nonlinear coherence effects in the response of the atomic medium to the fluctuating field. A theoretical model (derived from linearized Bloch equations) is presented that reproduces the main qualitative features of the experimental signals under simple assumptions.
description: 10 pages, 8 figures, submitted to Physical Review A Revised version
A GSD ESTIMATION OF THE RELATIVE WORTH OF COVER CROPS IN COTTON PRODUCTION SYSTEMS
Creators: name: Giesler, G. Grant
name: Paxton, Kenneth W.
name: Millhollon, E. P.
name: Giesler, G. Grant
name: Paxton, Kenneth W.
name: Millhollon, E. P.
Publisher: name: Unknown
Year: 1991
Subjects: Crop Production/Industries
Research Methods/ Statistical Methods

description: Cover crops can help reduce the negative environmental impacts of cotton production. This study used Generalized Stochastic Dominance to evaluate the relative worth, via risk premiums, of four cover crop regimes and two conventional production practices. Results indicate that cover crop regimes may be feasible alternatives to conventional practices.
The role of cognitive vulnerability to depression on the relationship between sleep and cognitive-emotional functioning
Creators: name: Loucas, Caitlyn A.
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 52
subject: Psychology
subject: FOS: Psychology
classificationCode: 5203
subject: Clinical and health psychology
classificationCode: 5204
subject: Cognitive and computational psychology

description: Although there is extensive literature exploring the impact of poor sleep on the cognitive and emotional dysregulation commonly found in depression disorders, research has not yet examined whether an individual’s level of cognitive vulnerability to depression (CV-D) moderates this relationship in the absence of high depressive symptoms. Increased sensitivity to poor sleep could represent one pathway through which vulnerable individuals progress into emergence of clinical depression. Ninety undergraduate college students with non-clinical depression scores reported their event appraisals, affect, and cognitions for one week using daily surveys. During this time, nightly sleep was recorded using Fitbit and ActiGraph devices. Results showed that, overall, cognitive vulnerability to depression did not moderate the relationship between sleep and cognitive-emotional functioning across most assessed outcome variables; however, where significant effects existed, individuals with higher levels of CV-D showed either no change or improvement in cognitive-emotional outcomes under conditions of poor sleep, compared to the uniformly poorer outcomes reported by their peers with low CV-D. This research highlighted the importance of understanding the interaction of daily sleep with an individual’s cognitive framework in order to predict cognitive-emotional functioning, especially in environments where disrupted sleep is common.
Order $α_s^2$ perturbative QCD corrections to the Gottfried sum rule
Creators: name: Kataev, A. L.
name: Parente, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The order $α_s^2$ perturbative QCD correction to the Gottfried sum rule is obtained. The result is based on numerical calculation of the order $α_s^2$ contribution to the coefficient function and on the new estimate of the three-loop anomalous dimension term. The correction found is negative and rather small. Therefore it does not affect the necessity to introduce flavour-asymmetry between $\bar{u}$ and $\bar{d}$ antiquarks for the description of NMC result for the Gottfried sum rule.
description: LaTeX, 7 pages, the discussions of the $\alpha_s^2$ corrections to the anomalous dimension are modified; 1 reference added; to be published in Phys. Lett.B
AREA-MEASURED CROP INSURANCE AND DISASTER AID FOR WHEAT AND GRAIN SORGHUM
Creators: name: Williams, Jeffery R.
name: Carriker, Gordon L.
name: Barnaby, G. Art
name: Harper, Jayson K.
name: Black, J. Roy
name: Williams, Jeffery R.
name: Carriker, Gordon L.
name: Barnaby, G. Art
name: Harper, Jayson K.
name: Black, J. Roy
Publisher: name: Unknown
Year: 1991
Subjects: Agricultural Finance
Crop Production/Industries

description: Area crop insurance and disaster aid program designs are compared to an individual farm-yield insurance design like the current FCIC multiple peril program. Stochastic dominance analysis of net return distributions for 45 wheat and grain sorghum farms in southcentral Kansas is used to determine which strategy is preferred. The area disaster aid program is preferred by generally risk-averse managers over the individual farm-yield design for wheat and sorghum. When individual farm crop insurance is compared directly with ~rea crop insurance, given an equivalent level of government liability for each, individual insurance is usually preferred by risk-averse managers. When the premium for the area insurance is subsidized by 10 percent or more, slightly risk-averse managers usually prefer area insurance to full-cost individual insurance. For area crop insurance to be preferred by managers that are more strongly risk averse, a higher subsidy level is required.
Consumer's Surplus versus Compensating Variation Revisited
Creators: name: LaFrance, Jeffrey T.
name: LaFrance, Jeffrey T.
Publisher: name: Unknown
Year: 1991
Subjects: subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: Compensating Variation
subject: Consumer's Surplus
subject: Demand Analysis
subject: Economic welfare
subject: Integrability

description: Consumer's surplus and a second-order approximation to compensating variation are compared to the exact compensating variation for a subsystem of several commodities. An empirical application to the relative retail price distortions created by the U.S. dairy program is presented. In the application, a new specification for weakly integrable incomplete demand models is developed and estimated. The integrable demand model has sufficient flexibility that it is not rejected by the data. Both welfare approximations are found to introduce large errors in the measurement of deadweight losses.
Estimating the Precision of Welfare Measures
Creators: name: Kling, Catherine L.
name: Kling, Catherine L.
Publisher: name: Unknown
Year: 1991
Subjects: Agricultural and Food Policy
Health Economics and Policy

description: Three methods for constructing standard errors of welfare estimates have been employed in the recreation demand literature: a Taylor's series approximation, the bootstrap, and a method proposed by Krinsky and Robb. This paper presents the results of a simulation experiment designed to examine the accuracy of these methods.
USDA EXPORT SALES REPORT: IS IT NEWS?
Creators: name: Patternson, Paul M.
name: Brorsen, B. Wade
name: Patternson, Paul M.
name: Brorsen, B. Wade
Publisher: name: Unknown
Year: 1991
Subjects: Agricultural and Food Policy
Teaching/Communication/Extension/Profession

description: This paper investigates whether the U.S. Export Sales report provides new information to the market. Event study methodology is used to evaluate the movement of futures prices on days around the release of the report. The results reveal that the information in the report is generally anticipated by traders.
Unification of Cosmology and Second Law of Thermodynamics: Solving Cosmological Constant Problem, and Inflation
Creators: name: Nielsen, Holger B.
name: Ninomiya, Masao
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We seek here to unify the second law of thermodynamics with the other laws, or at least to put up a law behind the second law of thermodynamics. Assuming no fine tuning, concretely by a random Hamiltonian, we argue just from equations of motion -- but {\em without} second law -- that entropy cannot go first up and then down again except with the rather strict restriction S_{large} \le S_{small 1} + S_{small 2}. Here S_{large} is the "large" entropy in the middle era while S_{small 1} and S_{small 2} are the entropies at certain times before and after the S_{large} - era respectively. From this theorem of "no strong maximum for the entropy" a cyclic time S^1 model world could have entropy at the most varying by a factor two and would not be phenomenologically realistic. With an open ended time axis (-\infty, \infty) ={\bf R} some law behind the second law of thermodynamics is needed if we do not obtain as the most likely happening that the entropy is maximal (i.e. the heat death having already occurred from the start). We express such a law behind the second law -- or unification of second law with the other ones -- by assigning a probability weight $P$ for finding the world/the system in various places in phase space. In such a model $P$ is almost unified with the rest as P = exp (-2 ~S_{Im}) with S_{Im} going in as the imaginary part of the action. We derive quite naturally the second law for practical purposes, a Big Bang with two sided time directions and a need for a bottom in the Hamiltonian density. Assuming the cosmological constant is a dynamical variable in the sense that it is counted as "initial condition" we even solve in our model the cosmological constant problem \underline{without} any allusion to anthropic principle.
description: 12 pages, revtex4
The characteristics of small farms and their development opportunities in Hungary
Creators: name: Kemény, Gábor
name: Rácz, Katalin
name: Hamza, Eszter
name: Keszthelyi, Szilárd
name: Tóth, Orsolya
name: Varga, Éva
name: Kemény, Gábor
name: Rácz, Katalin
name: Hamza, Eszter
name: Keszthelyi, Szilárd
name: Tóth, Orsolya
name: Varga, Éva
Publisher: name: Unknown
Year: 2017
Subjects: subject: Consumer/Household Economics
subject: Labor and Human Capital
subject: semi-subsistence farm
subject: part-time farm
subject: supplementary income
subject: household consumption

description: Small farms amount the largest group of agricultural holdings in Hungary, however their number significantly decreased by 36.4 per cent between 2005 and 2013. These predominantly subsistence or semi-subsistence farms are playing an important role by supplementing the rural household incomes and also producing the significant part of agricultural production. In our research, we examined the situation and future prospects of these small self-employed farms which are typically not engaged in market production and are not professional. The aim of the research was to present the major economic and social parameters of small farms, to identify their types, to border the circle of farms develop to market-oriented entities as well as to draw up development policy proposals.
RNA-based Phylogenetic Methods: Application to Mammalian Mitochondrial RNA Sequences
Creators: name: Hudelot, Cendrine
name: Gowri-Shankar, Vivek
name: Jow, Howsun
name: Rattray, Magnus
name: Higgs, Paul G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: The PHASE software package allows phylogenetic tree construction with a number of evolutionary models designed specifically for use with RNA sequences that have conserved secondary structure. Evolution in the paired regions of RNAs occurs via compensatory substitutions, hence changes on either side of a pair are correlated. Accounting for this correlation is important for phylogenetic inference because it affects the likelihood calculation. In the present study we use the complete set of tRNA and rRNA sequences from 69 complete mammalian mitochondrial genomes. The likelihood calculation uses two evolutionary models simultaneously for different parts of the sequence: a paired-site model for the paired sites and a single-site model for the unpaired sites. We use Bayesian phylogenetic methods and a Markov chain Monte Carlo algorithm is used to obtain the most probable trees and posterior probabilities of clades. The results are well resolved for almost all the important branches on the mammalian tree. They support the arrangement of mammalian orders within the four supra-ordinal clades that have been identified by studies of much larger data sets mainly comprising nuclear genes. Groups such as the hedgehogs and the murid rodents, which have been problematic in previous studies with mitochondrial proteins, appear in their expected position with the other members of their order. Our choice of genes and evolutionary model appears to be more reliable and less subject to biases caused by variation in base composition than previous studies with mitochondrial genomes.
Profitability and risk of crop and livestock production in Slovak farms
Creators: name: Tóth, Marián
name: Rábek, Tomáš
name: Boháčiková, Andrea
name: Holúbek, Ivan
name: Tóth, Marián
name: Rábek, Tomáš
name: Boháčiková, Andrea
name: Holúbek, Ivan
Publisher: name: Unknown
Year: 2017
Subjects: subject: Crop Production/Industries
subject: Farm Management
subject: Livestock Production/Industries
subject: profitability
subject: risk
subject: crop production
subject: livestock production
subject: portfolio

description: The paper focuses on profitability and risk of crop and livestock production based on an analysis of farms operating in the Slovak Republic. Risk in agriculture has been a matter of worldwide concern since 1933, when the concept of risk analysis was introduced. Agriculture is a sector facing particularly large risks, resulting mainly from natural factors outside the control of farmers. The resulting variations in farm output, combined with a relatively low price responsiveness of supply and demand, also cause agricultural markets to be rather volatile. The sources of risks that are relevant in agriculture have different characteristics, and can be classified in very different ways. Sources of risk include biological nature of production, dependency on climatic conditions, seasonality, animal and plant health, prices instability, policy regulations, and a range of macroeconomic factors.
High Performances Corrugated Feed Horns for Space Applications at Millimetre Wavelengths
Creators: name: Villa, F.
name: Sandri, M.
name: Mandolesi, N.
name: Nesti, R.
name: Bersanelli, M.
name: Simonetto, A.
name: Sozzi, C.
name: D'Arcangelo, O.
name: Muzzini, V.
name: Mennella, A.
name: Guzzi, P.
name: Radaelli, P.
name: Fusi, R.
name: Alippi, E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the design, fabrication and testing of a set of high performance corrugated feed horns at 30 GHz, 70 GHz and 100 GHz, built as advanced prototypes for the Low Frequency Instrument (LFI) of the ESA Planck mission. The electromagnetic designs include linear (100 GHz) and dual shaped (30 and 70 GHz) profiles. Fabrication has been achieved by direct machining at 30 GHz, and by electro-formation at higher frequencies. The measured performances on side lobes and return loss meet the stringent Planck requirements over the large (20%) instrument bandwidth. Moreover, the advantage in terms of main lobe shape and side lobes levels of the dual profiled designs has been demonstrated.
description: 16 pages, 7 figures, accepted for publication in Experimental Astronomy
Human resources in Slovak agriculture: impact of selected factors
Creators: name: Savov, Radovan
name: Lančarič, Drahoslav
name: Kozáková, Jana
name: Némethová, Veronika
name: Savov, Radovan
name: Lančarič, Drahoslav
name: Kozáková, Jana
name: Némethová, Veronika
Publisher: name: Unknown
Year: 2017
Subjects: subject: Labor and Human Capital
subject: Production Economics
subject: employment
subject: wages
subject: agricultural utilised area
subject: productivity
subject: production type

description: This study examines the impact of selected factors on employment in agriculture in Slovakia. Slovakia was known as an agricultural country, but employment in this sector has declined in the last two decades. The research is based on firm-level data from the database of the Slovak Ministry of Agriculture and Rural Development for the years 1997, 2001, 2005, 2009 and 2013. The results show that wages and agricultural utilised area are the most significant factors that influence the number of employees in agriculture in Slovakia. Other factors such as production type (crop or livestock) and productivity were found to be less significant factors that influence employment in agriculture
A survey for water maser emission towards planetary nebulae. New detection in IRAS 17347-3139
Creators: name: de Gregorio-Monsalvo, Itziar
name: Gomez, Yolanda
name: Anglada, Guillem
name: Cesaroni, Riccardo
name: Miranda, Luis F.
name: Gomez, Jose F.
name: Torrelles, Jose M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on a water maser survey towards a sample of 27 planetary nebulae (PNe) using the Robledo de Chavela and Medicina single-dish antennas, as well as the Very Large Array (VLA). Two detections have been obtained: the already known water maser emission in K 3-35, and a new cluster of masers in IRAS 17347-3139. This low rate of detections is compatible with the short life-time of water molecules in PNe (~100 yr). The water maser cluster at IRAS 17347-3139 are distributed on a ellipse of size ~ 0.2" x 0.1", spatially associated with compact 1.3 cm continuum emission (simultaneously observed with the VLA). From archive VLA continuum data at 4.9, 8.4, and 14.9 GHz, a spectral index alpha = 0.76 +- 0.03 is derived for this radio source, which is consistent with either a partially optically thick ionized region or with an ionized wind. However, the latter scenario can be ruled out on mass-loss considerations, thus indicating that this source is probably a young PN. The spatial distribution and the radial velocities of the water masers are suggestive of a rotating and expanding maser ring, tracing the innermost regions of a torus formed at the end of the AGB phase. Given that the 1.3 cm continuum emission peak is located near one of the tips of the major axis of the ellipse of masers, we speculate on a possible binary nature of IRAS 17347-3139, where the radio continuum emission could belong to one of the components and the water masers would be associated with a companion.
description: Accepted by The Astrophysical Journal. 25 pages, 6 figures