cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Random matrices with external source and multiple orthogonal polynomials
Creators: name: Bleher, P. M.
name: Kuijlaars, A. B. J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We show that the average characteristic polynomial P_n(z) = E [\det(zI-M)] of the random Hermitian matrix ensemble Z_n^{-1} \exp(-Tr(V(M)-AM))dM is characterized by multiple orthogonality conditions that depend on the eigenvalues of the external source A. For each eigenvalue a_j of A, there is a weight and P_n has n_j orthogonality conditions with respect to this weight, if n_j is the multiplicity of a_j. The eigenvalue correlation functions have determinantal form, as shown by Zinn-Justin. Here we give a different expression for the kernel. We derive a Christoffel-Darboux formula in case A has two distinct eigenvalues, which leads to a compact formula in terms of a Riemann-Hilbert problem that is satisfied by multiple orthogonal polynomials.
description: 17 pages
THE RELATIONSHIP OF PHYSICAL-SELF CONCEPT AND IDENTITY TO ANXIETY, DEPRESSION AND ACADEMIC PERFORMANCE
Creators: name: Watkins, Joan
Publisher: name: American University
Year: 2023

description: The purpose of this study was to identify and interpret the relationships between two components of self concept (physical-self concept and identity) and (a) the two affective states of anxiety and depression and (b) academic performance. The research was a correlational study involving black college freshmen in an academic reinforcement program at Howard University. During the first week of classes, all subjects completed the Multiple affect Adjective Check List, the Tennessee Self Concept Scale and a Student Classification Form (for screening purposes) in a classroom setting. The measure for academic performance was subject's first semester grade point average. Multiple regression analyses and correlation coefficients were used to analyze the data. Hypothesis One stated that physical-self concept and identity were significant predictors of level of anxiety. Hypothesis Two stated that physical-self concept and identity were significant predictors of level of depression. While physical-self concept and identity accounted for relatively small percentages of the variance in anxiety and depression, both hypotheses were supported. However, Hypothesis Three, which stated that physical-self concept and identity were significant predictors of level of academic performance, was not supported. Related studies in the area of overall self concept support the findings for the first two hypotheses of the present research. Possible explanations for the insignificant findings of the third hypothesis were presented. Further research is indicated in order to more accurately assess the influence of physical-self concept and identity on level of academic performance.
Natureza das funções e modalidades de constituição do vínculo de emprego público – brevíssima crónica de alguns equívocos legislativos
Creators: name: Fábrica, Luís
Publisher: name: Direito e Justiça
Year: 2015

description: Direito e Justiça, v. 2 n. Especial (2015): Estudos dedicados ao Professor Doutor Bernardo da Gama Lobo Xavier
Bogoliubov many-body perturbation theory under constraint
Creators: name: Demol, Pepijn
name: Frosini, Mikael
name: Tichai, Alexander
name: Somà, Vittorio
name: Duguet, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In order to solve the A-body Schrödinger equation both accurately and efficiently for open-shell nuclei, a novel many-body method coined as Bogoliubov many-body perturbation theory (BMBPT) was recently formalized and applied at low orders. Based on the breaking of U(1) symmetry associated with particle-number conservation, this perturbation theory must operate under the constraint that the average number of particles is self-consistently adjusted at each perturbative order. The corresponding formalism is presently detailed with the goal to characterize the behavior of the associated Taylor series. BMBPT is, thus, investigated numerically up to high orders at the price of restricting oneself to a small, i.e. schematic, portion of Fock space. While low-order results only differ by 2 - 3 % from those obtained via a configuration interaction (CI) diagonalization, the series is shown to eventually diverge. The application of a novel resummation method coined as eigenvector continuation further increase the accuracy when built from low-order BMBPT corrections and quickly converges towards the CI result when applied at higher orders. Furthermore, the numerically-costly self-consistent particle number adjustment procedure is shown to be safely bypassed via the use of a computationally cheap a posteriori correction method. Eventually, the present work validates the fact that low order BMBPT calculations based on an a posteriori (average) particle number correction deliver controlled results and demonstrates that they can be optimally complemented by the eigenvector continuation method to provide results with sub-percent accuracy. This approach is, thus, planned to become a workhorse for realistic ab initio calculations of open-shell nuclei in the near future.
description: 45 pages, 10 figures; accepted version
Extended sudden approximation model for high-energy nucleon removal reactions
Creators: name: Carstoiu, F.
name: Sauvan, E.
name: Orr, N. A.
name: Bonaccorso, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A model based on the sudden approximation has been developed to describe high energy single nucleon removal reactions. Within this approach, which takes as its starting point the formalism of Hansen \cite{Anne2}, the nucleon-removal cross section and the full 3-dimensional momentum distributions of the core fragments including absorption, diffraction, Coulomb and nuclear-Coulomb interference amplitudes, have been calculated. The Coulomb breakup has been treated to all orders for the dipole interaction. The model has been compared to experimental data for a range of light, neutron-rich psd-shell nuclei. Good agreement was found for both the inclusive cross sections and momentum distributions. In the case of $^{17}$C, comparison is also made with the results of calculations using the transfer-to-the-continuum model. The calculated 3-dimensional momentum distributions exhibit longitudinal and transverse momentum components that are strongly coupled by the reaction for s-wave states, whilst no such effect is apparent for d-waves. Incomplete detection of transverse momenta arising fromlimited experimental acceptances thus leads to a narrowing of the longitudinal distributions for nuclei with significant s-wave valence neutron configurations, as confirmed by the data. Asymmetries in the longitudinal momentum distributions attributed to diffractive dissociation are also explored.
description: 16 figures, submitted to Phys. Rev. C
THE RELATIONSHIP OF PHYSICAL-SELF CONCEPT AND IDENTITY TO ANXIETY, DEPRESSION AND ACADEMIC PERFORMANCE
Creators: name: Watkins, Joan
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 52
subject: Psychology
subject: FOS: Psychology
classificationCode: 5201
subject: Applied and developmental psychology

description: The purpose of this study was to identify and interpret the relationships between two components of self concept (physical-self concept and identity) and (a) the two affective states of anxiety and depression and (b) academic performance. The research was a correlational study involving black college freshmen in an academic reinforcement program at Howard University. During the first week of classes, all subjects completed the Multiple affect Adjective Check List, the Tennessee Self Concept Scale and a Student Classification Form (for screening purposes) in a classroom setting. The measure for academic performance was subject's first semester grade point average. Multiple regression analyses and correlation coefficients were used to analyze the data. Hypothesis One stated that physical-self concept and identity were significant predictors of level of anxiety. Hypothesis Two stated that physical-self concept and identity were significant predictors of level of depression. While physical-self concept and identity accounted for relatively small percentages of the variance in anxiety and depression, both hypotheses were supported. However, Hypothesis Three, which stated that physical-self concept and identity were significant predictors of level of academic performance, was not supported. Related studies in the area of overall self concept support the findings for the first two hypotheses of the present research. Possible explanations for the insignificant findings of the third hypothesis were presented. Further research is indicated in order to more accurately assess the influence of physical-self concept and identity on level of academic performance.
Hesione Savigny 1818
Creators: name: Salazar-Vallejo, Sergio I.
name: Carrera-Parra, Luis F.
name: Muir, Alexander I.
name: León-González, Jesús Angel De
name: Piotrowski, Christina
name: Sato, Masanori
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Hesionidae
Hesione

description: Hesione Savigny in Lamarck, 1818 eugeniae Kinberg, 1866: Bangka Strait, Indonesia. SMNH 6733 (redescr. Hartman 1949) intertexta Grube, 1878: Zamboanga, Philippines. MPW 293, ZMB 3813
description: Published as part of Salazar-Vallejo, Sergio I., Carrera-Parra, Luis F., Muir, Alexander I., León-González, Jesús Angel De, Piotrowski, Christina & Sato, Masanori, 2014, Polychaete species (Annelida) described from the Philippine and China Seas, pp. 1-68 in Zootaxa 3842 (1) on page 18, DOI: 10.11646/zootaxa.3842.1.1, http://zenodo.org/record/4928482
Electromagnetic transitions of the helium atom in superstrong magnetic fields
Creators: name: Al-Hujaj, O. -A.
name: Schmelcher, P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate the electromagnetic transition probabilities for the helium atom embedded in a superstrong magnetic field taking into account the finite nuclear mass. We address the regime γ=100-10000 a.u. studying several excited states for each symmetry, i.e. for the magnetic quantum numbers 0,-1,-2,-3, positive and negative z parity and singlet and triplet symmetry. The oscillator strengths as a function of the magnetic field, and in particular the influence of the finite nuclear mass on the oscillator strengths are shown and analyzed.
description: 10 pages, 8 figures
TEENAGE PREGNANCY AND ADOLESCENT RISK-TAKING: THE INFLUENCE OF ALIENATION, FEMINIST IDEOLOGY, CONTRACEPTIVE ORIENTATION, SOCIOECONOMIC STATUS, AND TRADITIONAL/FUNDAMENTALIST RELIGION UPON THE ADOLESCENT WOMAN'S DECISION WHETHER TO CONTRACEPT
Creators: name: Dixon, Beth Darrough
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 4410
subject: Sociology
subject: FOS: Sociology

description: The prevalence of teenage pregnancy in the United States today is described by some as having reached epidemic proportions. Early childbearing poses serious health, social, and economic consequences for teenage mothers and their children. Of special concern to the public is the fact that pregnancy rates have increased for the younger adolescents, those girls aged ten to fourteen. Some observers blame the general liberalization of sexual mores for this increase in younger adolescent pregnancy, while others argue that because of improved nutrition and health, it is the fecundity of adolescents that has increased rather than their sexual activity. Although teenage pregnancy in the United States has traditionally been a problem associated with minority groups and low-income families, in the last decade there has been a dramatic increase in pregnancy rates among white, middle-class teenagers. This fact refutes those who would explain teenage pregnancy solely in terms of race or poverty and has led to an increased public awareness of the problem of teenage pregnancy. Our interest in the topic focused on the social-psychology of the adolescent girl before she becomes pregnant. We asked, why does the teenage girl decide to take the risk of becoming pregnant? For answers to such questions we developed a middle-range theory which was influenced by the literature, particularly the work of Kristin Luker. Our theory holds that alienation, feminist ideology, contraceptive orientation, socioeconomic status, and traditional/fundamentalist religion were contributing factors in the girl's risk-taking behavior. We constructed five ideal types to describe how these variables interrelate to predict adolescent risk-taking. To test our theory we performed a secondary statistical analysis of quantitative data collected by Melvin Zelnik and John F. Kantner of Johns Hopkins University. In replicating Zelnik and Kantner's findings on teenage sexual and contraceptive behavior, pregnancy, childbirth, and abortion, we extended their analysis by controlling for family income. This measure of socioeconomic status appeared to be an important intervening variable in the relationship between race and teenage fertility behavior. Support for our theory was provided by the data analysis, through hypothesis-testing, and the performance of a path analysis. To present an overall verification of our theory, the ideal types were again discussed in light of the data analysis.
KULCSÁR LÁSZLÓ: A VIDÉKFEJLESZTÉS ELMÉLETI MEGKÖZELÍTÉSE: REGIONÁLIS ÉS KULTURÁLIS ÖSSZEFÜGGÉSEK (KÖNYVISMERTETŐ)
Creators: name: Nagyné Demeter, Dóra
name: Nagyné Demeter, Dóra
Publisher: name: Unknown
Year: 2018
Subjects: Community/Rural/Urban Development

description: Könyvismertető - Book review
Individual e coletivo na transmissão de unidade económica, na jurisprudência recente do Tribunal de Justiça
Creators: name: Gomes, Júlio Manuel Vieira
Publisher: name: Direito e Justiça
Year: 2015

description: Direito e Justiça, v. 2 n. Especial (2015): Estudos dedicados ao Professor Doutor Bernardo da Gama Lobo Xavier
Studies on charging-up of single Gas Electron Multiplier
Creators: name: Kumar, Vishal
name: Tripathy, Sridhar
name: Bhattacharya, Purba
name: Mukhopadhyay, Supratik
name: Majumdar, Nayana
name: Sarkar, Sandip
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Mechanisms of charging-up and charging-down of Gas Electron Multiplier (GEM) have been studied. Experimental investigations have been carried out on both dielectric polarization and radiation charging of GEMs. Environmental parameters, such as pressure and temperature have been monitored to normalize their effects on the charging-up and charging-down measurements. Variation in gain due to the combined, as well as individual, effects of the mentioned parameters has been illustrated.
A KEVERÉKTAKARMÁNY-GYÁRTÁS KILÁTÁSAI MAGYARORSZÁGON, KÜLÖNÖS TEKINTETTEL AZ ÁLLATTARTÁS KÖRNYEZETTERHELÉSÉRE
OUTLOOK OF COMPOUND FEED PRODUCTION IN HUNGARY WITH SPECIAL REGARD TO ENVIRONMENTAL PRESSURES RELATED TO LIVESTOCK PRODUCTION
Creators: name: Popp, József
name: Harangi-Rákos, Mónika
name: Tikász, Ildikó Edit
name: Varga, Edina
name: Oláh, Judit
name: Popp, József
name: Harangi-Rákos, Mónika
name: Tikász, Ildikó Edit
name: Varga, Edina
name: Oláh, Judit
Publisher: name: Unknown
Year: 2018
Subjects: subject: Crop Production/Industries
subject: Production Economics
subject: takarmánykeverék-gyártás
subject: környezetterhelés
subject: takarmányreceptúra
subject: termékfejlesztés
subject: compound feed production
subject: environmental pressure
subject: compound feed recipe
subject: product development

description: Magyarországon a 337 üzemben előállított 3,7 millió tonna keveréktakarmány 50%- át a baromfitáp, 34%-át a sertéstáp, 10%-át a szarvasmarhatáp és 6%-át az egyéb táp tette ki 2016-ban. A keveréktakarmány mennyiségének 17%-át a TOP 5 takarmánygyártó üzem, 28,0%-át a TOP 10 üzem, míg 37%-át a TOP 15 termelte meg. A magas minőségű keveréktakarmányok gyártásához elengedhetetlen a technológiai rendszerek vezérlésének fejlesztése, a 10-20 éves gyártóberendezések lecserélése, vagy a készletnyilvántartó szoftverek fejlesztése. A fejlesztési irányok tekintetében kiemelést érdemel a takarmányreceptúra változása, amit a környezetvédelmi politika is kikényszerít. Mindez hatást gyakorol a felhasznált alapanyagok összetételére és beszerzésére, például a szállításból származó CO2 csökkentése érdekében. A keveréktakarmány-feldolgozók előnyben részesítik a helyi energia- és fehérjehordozó takarmányokat. Az állattartó telepek számára igen magas hozzáadott értéket képviselő keveréktakarmányok készítéséhez egyre nagyobb szükség lesz a telepi kutatás-fejlesztési eredményekre alapozott receptúrakészítésnek. ------------------- Hungary had 337 feed manufacturing plants in 2016 with a total production of 3.746 million tonnes of compound feed. Poultry feed has by far the largest share with 51.7% followed by pig feed with 33.7%, beef feed with 10.4% and other feed with 5.2%. The top 5 feed manufacturing plants produced 17.2% of the total industrial feed output, top 10 had a 28% and top 15 a 37% share of total production. For the production of high-quality compound feed, it is essential to improve the manufacturing technology by the modernisation of the 10-20 years old production equipment and inventory software. With regard to the development directions, the production of compound feed with customized recipe needs to be highlighted, which is also enforced by environmental policy. All this has an effect on the composition and procurement of feed materials used, for example, to reduce CO2 emission from transport. Industrial feed producer plants prefer local energy and protein feed. For the production of high quality compound feed, it is becoming increasingly necessary to make recipes based on site research and results.
TEENAGE PREGNANCY AND ADOLESCENT RISK-TAKING: THE INFLUENCE OF ALIENATION, FEMINIST IDEOLOGY, CONTRACEPTIVE ORIENTATION, SOCIOECONOMIC STATUS, AND TRADITIONAL/FUNDAMENTALIST RELIGION UPON THE ADOLESCENT WOMAN'S DECISION WHETHER TO CONTRACEPT
Creators: name: Dixon, Beth Darrough
Publisher: name: American University
Year: 2023

description: The prevalence of teenage pregnancy in the United States today is described by some as having reached epidemic proportions. Early childbearing poses serious health, social, and economic consequences for teenage mothers and their children. Of special concern to the public is the fact that pregnancy rates have increased for the younger adolescents, those girls aged ten to fourteen. Some observers blame the general liberalization of sexual mores for this increase in younger adolescent pregnancy, while others argue that because of improved nutrition and health, it is the fecundity of adolescents that has increased rather than their sexual activity. Although teenage pregnancy in the United States has traditionally been a problem associated with minority groups and low-income families, in the last decade there has been a dramatic increase in pregnancy rates among white, middle-class teenagers. This fact refutes those who would explain teenage pregnancy solely in terms of race or poverty and has led to an increased public awareness of the problem of teenage pregnancy. Our interest in the topic focused on the social-psychology of the adolescent girl before she becomes pregnant. We asked, why does the teenage girl decide to take the risk of becoming pregnant? For answers to such questions we developed a middle-range theory which was influenced by the literature, particularly the work of Kristin Luker. Our theory holds that alienation, feminist ideology, contraceptive orientation, socioeconomic status, and traditional/fundamentalist religion were contributing factors in the girl's risk-taking behavior. We constructed five ideal types to describe how these variables interrelate to predict adolescent risk-taking. To test our theory we performed a secondary statistical analysis of quantitative data collected by Melvin Zelnik and John F. Kantner of Johns Hopkins University. In replicating Zelnik and Kantner's findings on teenage sexual and contraceptive behavior, pregnancy, childbirth, and abortion, we extended their analysis by controlling for family income. This measure of socioeconomic status appeared to be an important intervening variable in the relationship between race and teenage fertility behavior. Support for our theory was provided by the data analysis, through hypothesis-testing, and the performance of a path analysis. To present an overall verification of our theory, the ideal types were again discussed in light of the data analysis.
CONTRIBUTIONS OF THE INTER-AMERICAN SYSTEM TO THE DEVELOPMENT OF PUBLIC INTERNATIONAL LAW
Creators: name: Maisch, Christian Joaquin
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 48
subject: Law and legal studies
classificationCode: 4803
subject: International and comparative law

description: Some contributions of the nations of America, their international scholars, and the Inter-American system to the development of public international law were studied as evidence of the usefulness of the regional approach to world order. The method used in the study was that of legal and historical analysis. The principles studied are classified in three groups representing three different international concerns or foreign policy objectives of the American states since independence. These concerns or foreign policy objectives of the American states are their recognition as fully sovereign entities, maintaining the peace, and reforming the international system. The principles studied in the first group are self-determination, non-intervention, and sovereign equality. Those studied in the second group are uti juris erat (or American uti possidetis), no right of conquest, peaceful settlement of disputes, and collective security. The principles studied in the third group are multilateral cooperation for development, the two-hundred mile zone of jurisdictional waters, and the international protection of human rights. Although the general objective of the Inter-American system has been the acceptance of all of these principles by the world community, the role played by this regional system in the development and strengthening of each of these principles was found to vary with the principle. The role played by the American states ranged from original development of the principles (e.g., the two-hundred mile zone of jurisdictional waters) to institutional assistance in the implementation of a global principle at the regional level (e.g., the international protection of human rights). In all the cases studied though, the role played by the Inter-American system has been positive and has significantly contributed to the development of public universal law. The effectiveness of the Inter-American system, fostered by its relative internal homogeneity, in contributing to the development of international legal principles was found to prove the usefulness of the regional approach to world order.
Hard X-ray Flares Preceding Soft X-ray Outbursts in Aquila X-1: A Link between Neutron Star and Black Hole State Transitions
Creators: name: Yu, Wenfei
name: Klein-Wolt, Marc
name: Fender, Rob
name: van der Klis, Michiel
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have analyzed {\it Rossi X-ray Timing Explorer} (RXTE) data of the neutron star transient Aquila X-1 obtained during its outbursts in May/June 1999 and September/October 2000. We find that in the early rise of these outbursts, a hard flare in the energy range above 15 keV preceded the soft X-ray peak. The hard X-ray flux of the hard flares at maximum was more than a factor of three stronger than at any other point in the outbursts. The rise of the hard X-ray flare to this maximum, was consistent with a monotonically brightening low/hard state spectrum. After the peak of the hard flare, a sharp spectral transition occurred with spectral pivoting in the range 8--12 keV. Our timing analysis shows that during the hard flare the power spectra were mainly composed of band-limited noise and a $\sim$ 1--20 Hz QPO, which correlate in frequency. Immediately after the hard flare, the power spectra turned into power law noise. The spectral and timing properties during and after the hard flares are very similar to those in black hole transients during the early rise of an outburst. We suggest that these hard flares and spectral transitions in Aql X-1 are of the same origin as those observed in black hole transients. This leads to the association of the 1--20 Hz QPOs and band-limited noise in Aql X-1 with those in black hole transients. We discuss the impact of this discovery on our understanding of soft X-ray transient outbursts, state transitions and variability in X-ray binaries.
description: 13 pages including 4 figures, accepted for publication in ApJL. For more details, see http://zon.wins.uva.nl/~yuwf/xraytransients.html
CONTRIBUTIONS OF THE INTER-AMERICAN SYSTEM TO THE DEVELOPMENT OF PUBLIC INTERNATIONAL LAW
Creators: name: Maisch, Christian Joaquin
Publisher: name: American University
Year: 2023

description: Some contributions of the nations of America, their international scholars, and the Inter-American system to the development of public international law were studied as evidence of the usefulness of the regional approach to world order. The method used in the study was that of legal and historical analysis. The principles studied are classified in three groups representing three different international concerns or foreign policy objectives of the American states since independence. These concerns or foreign policy objectives of the American states are their recognition as fully sovereign entities, maintaining the peace, and reforming the international system. The principles studied in the first group are self-determination, non-intervention, and sovereign equality. Those studied in the second group are uti juris erat (or American uti possidetis), no right of conquest, peaceful settlement of disputes, and collective security. The principles studied in the third group are multilateral cooperation for development, the two-hundred mile zone of jurisdictional waters, and the international protection of human rights. Although the general objective of the Inter-American system has been the acceptance of all of these principles by the world community, the role played by this regional system in the development and strengthening of each of these principles was found to vary with the principle. The role played by the American states ranged from original development of the principles (e.g., the two-hundred mile zone of jurisdictional waters) to institutional assistance in the implementation of a global principle at the regional level (e.g., the international protection of human rights). In all the cases studied though, the role played by the Inter-American system has been positive and has significantly contributed to the development of public universal law. The effectiveness of the Inter-American system, fostered by its relative internal homogeneity, in contributing to the development of international legal principles was found to prove the usefulness of the regional approach to world order.
Dark Photon Oscillations in Our Inhomogeneous Universe
Creators: name: Caputo, Andrea
name: Liu, Hongwan
name: Mishra-Sharma, Siddharth
name: Ruderman, Joshua T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A dark photon may kinetically mix with the ordinary photon, inducing oscillations with observable imprints on cosmology. Oscillations are resonantly enhanced if the dark photon mass equals the ordinary photon plasma mass, which tracks the free electron number density. Previous studies have assumed a homogeneous Universe; in this Letter, we introduce for the first time an analytic formalism for treating resonant oscillations in the presence of inhomogeneities of the photon plasma mass. We apply our formalism to determine constraints from Cosmic Microwave Background photons oscillating into dark photons, and from heating of the primordial plasma due to dark photon dark matter converting into low-energy photons. Including the effect of inhomogeneities demonstrates that prior homogeneous constraints are not conservative, and simultaneously extends current experimental limits into a vast new parameter space.
description: 5+8 pages, 3+6 figures; v2, added appendix on energy injection assumptions, minor updates to figures, results and conclusions unchanged; v3, minor changes, similar to version published in PRL
Sound Related Napping Preferences Among UBC Students
Creators: name: Hernandez, Eddy
name: Deville, Lou
name: Saviola, Sofia
name: Miller, Jonathan
name: Aramayo, Maria
Publisher: name: The University of British Columbia
Year: 2019

description: Napping is a useful way for sleep-deprived students to catch up on missed sleep. With the upcoming introduction of a nap room in the planned Arts Student Centre, it is important for UBC to learn about the varied preferences its students may have for their sleeping and napping environments. Our group conducted a survey to investigate which sounds UBC students prefer to listen to when napping. We distributed an online survey containing questions regarding their sound preferences. More students indicated that they prefer to sleep to silence compared to classical piano music, white noise, and nature sounds (p < .05), suggesting that a silent napping room may be most suitable for student preferences, comfort, and sleep onset. A sizable proportion of students also indicated that they would have preferred to listen to a different type of music than classical piano music, which was the only genre option presented in our survey. This may have affected our findings, as those students may have preferred music overall but selected another option due to the absence of their preferred genre. Future research may benefit from including a wider variety of music genres in the sound conditions. 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.”
Hesionides Friedrich 1936
Creators: name: Salazar-Vallejo, Sergio I.
name: Carrera-Parra, Luis F.
name: Muir, Alexander I.
name: León-González, Jesús Angel De
name: Piotrowski, Christina
name: Sato, Masanori
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Hesionidae
Hesionides

description: Hesionides Friedrich, 1936 incisa Yamanishi, 1984: Kagoshima, Japan. OMNH 623-1, 623-2 – 15
description: Published as part of Salazar-Vallejo, Sergio I., Carrera-Parra, Luis F., Muir, Alexander I., León-González, Jesús Angel De, Piotrowski, Christina & Sato, Masanori, 2014, Polychaete species (Annelida) described from the Philippine and China Seas, pp. 1-68 in Zootaxa 3842 (1) on page 18, DOI: 10.11646/zootaxa.3842.1.1, http://zenodo.org/record/4928482
GREEN AWARENESS: CONSCIOUS STEPS TAKEN
ZÖLD TUDATOSSÁG: MEGFONTOLT LÉPÉSEK
Creators: name: Othman, Ghazala
name: Alghamdi, Hani
name: Varga, Erika
name: Almádi, Bernadett
name: Othman, Ghazala
name: Alghamdi, Hani
name: Varga, Erika
name: Almádi, Bernadett
Publisher: name: Unknown
Year: 2018
Subjects: subject: Environmental Economics and Policy
subject: Research and Development/Tech Change/Emerging Technologies
subject: development
subject: challenge
subject: economy
subject: environment
subject: sustainability
subject: fejlődés
subject: kihívás
subject: gazdaság
subject: környezetvédelem
subject: fenntarthatóság

description: Jelenleg számos változást tapasztalunk a globális színtéren. Mivel azonban a természetes megújuló erőforrások végesek, a folyamatos fejlődést más tényezők által is biztosítani kell. A végső cél az, hogy elérjük azt a zöld gazdaságot, ahol a fenntarthatóság megvalósítható. A „zöld növekedés” egy nemzetközileg elfogadott és kívánatos jövő. Az energiaellátás szempontjából meg kell valósítani a megújuló energiaforrások intenzívebb felhasználását. A helyi erőforrások előnyben részesítése is a fenntarthatóságot segíti elő. Magyarország számára az egyik prioritás a foglalkoztatás javítása. Az adózás szintén megkönnyítheti a gazdaság zöldebbé tételét. A tanulmány olyan statisztikai adatokat elemez, amelyekből következtetések vonhatók le táblázatok és ábrák formájában. --------------------------- Currently, we are experiencing a lot of changes on a global scene. However, as our natural non-renewable resources are finite, continuous development must be ensured by other factors. The ultimate objective is to reach the state of a green economy where sustainability can be maintained. ‘Green growth’ means an internationally accepted and desirable future. In terms of energy supply a more intense use of renewable energy sources must be accomplished. Preferring local resources makes sustainability possible. One of the priorities for Hungary is improving employment in this industry. Taxation can also ease making the economy greener. The paper analyses statistical data from where conclusions are drawn in the form of tables and figures, as well.
A PRINCIPAL COMPONENTS APPROACH TO SOME MULTIVARIATE ESTIMATION PROBLEMS WITH INCOMPLETE DATA
Creators: name: Asproudis, Spyros Christoforou
Publisher: name: American University
Year: 2023

description: The maximum likelihood estimators of the parameters of a multivariate normal distribution based on monotone samples and their first two moments were derived in the literature. When multicollinearity is present, these estimators are unreliable. By using a subset of the sample covariance matrix's principal components we construct estimators free of the distortions caused by multicollinearity. The new estimators are shown to be consistent and asymptotically unbiased. We derive the distributions of various functions of the sample covariance matrix pertaining to those estimators and obtain closed form expressions for the first two moments of the estimators based on principal components. These expressions, however, are not easily evaluated. We also examine the multivariate regression problem in monotone samples. When there is no indication of multicollinearity, we propose a set of estimators for the regression parameters which are shown to be consistent, asymptotically unbiased and to have smaller variances than the usual least squares regression estimators. Principal component regression is often applied in cases of highly correlated "independent" variables. The technique is extended in monotone multicollinear samples. The estimators produced have some optimum properties. Results related to the development of the principal components' estimators and examples are also considered.
Heteropodarke Hartmann-Schroder 1962
Creators: name: Salazar-Vallejo, Sergio I.
name: Carrera-Parra, Luis F.
name: Muir, Alexander I.
name: León-González, Jesús Angel De
name: Piotrowski, Christina
name: Sato, Masanori
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Hesionidae
Heteropodarke

description: Heteropodarke Hartmann-Schröder, 1962 pleijeli Muona, 2006: Madang Lagoon, Papua New Guinea. SMNH 5190 xiamenensis Ding, Wu & Westheide, 1997: Huangchu Beach, East China Sea. SMF6092, SMF6093, SMF6094, SMF6095 (redescr. Pleijel 1999)
description: Published as part of Salazar-Vallejo, Sergio I., Carrera-Parra, Luis F., Muir, Alexander I., León-González, Jesús Angel De, Piotrowski, Christina & Sato, Masanori, 2014, Polychaete species (Annelida) described from the Philippine and China Seas, pp. 1-68 in Zootaxa 3842 (1) on page 18, DOI: 10.11646/zootaxa.3842.1.1, http://zenodo.org/record/4928482
SiO Maser Survey of the Large-Amplitude Variables in the Galactic Center
Creators: name: Deguchi, S.
name: Imai, H.
name: Fujii, T.
name: Glass, I. S.
name: Ita, Y.
name: Izumiura, H.
name: Kameya, O.
name: Miyazaki, A.
name: Nakada, Y.
name: Nakashima, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have surveyed ~400 known large-amplitude variables within 15' of the galactic center in the SiO J=1--0 v=1 and 2 maser lines at 43 GHz, resulting in 179 detections. SiO lines were also detected from 16 other resulting in 180 detections. SiO lines were also detected from 16 other sources, which are located within 20" (the telescope half beamwidth) of the program objects. The detection rate of 48 percent is comparable to that obtained in Bulge IRAS source surveys. Among the SiO detections, five stars have radial velocities greater than 200 km/s. The SiO detection rate increases steeply with the period of light variation, particularly for stars with P>500 d, where it exceeds 80%. We found that, at a given period, the SiO detection rate is approximately three times that for OH. These facts suggest that the large-amplitude variables in the Nuclear Disk region are AGB stars similar in their overall properties to the inner and outer Bulge IRAS/SiO sources. From the set of radial velocity data, the mass distribution within 30 pc of the galactic center is derived by a new method which is based on the collisionless Boltzmann equation integrated along the line of sight. The mass within 30 pc is about 6.4 [\pm 0.7] \times 10^7 M_{\odot} and the mass of the central black hole is 2.7 [\pm 1.3] \times 10^6 M_{\odot}. Consideration of the line-of-sight velocity of each star and its potential energy leads to the conclusion that the five high-velocity stars come from galactocentric distances as high as 300 pc. The high-velocity subsample of stars with negative radial velocities exhibits a tendency to have brighter K magnitudes than the subsample of stars with positive velocities. The origin of these high-velocity stars is discussed.
description: Hires. figures are available as No.604 of NRO report at http://www.nro.nao.ac.jp/library/report/list.html . PASJ 56 (april 28 issue) in press
DEMETER MINŐSÍTÉSSEL RENDELKEZŐ BIODINAMIKUS GAZDASÁGOK TRENDJEI VILÁGSZERTE
TRENDS OF DEMETER CERTIFIED BIODYNAMIC FARMS IN THE WORLD
Creators: name: Mucha, László
name: Domán, Szilvia
name: Mucha, László
name: Domán, Szilvia
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Demand and Price Analysis
subject: biodinamikus gazdálkodás
subject: nemzetközi trendek
subject: Demeter védjegy
subject: arány vizsgálatok
subject: biodynamic farming
subject: international trends
subject: Demeter trademark
subject: rate comparisons

description: Korunk sokat kutatott területe az egészség és a táplálkozás kapcsolata. Létrejött egy tudatos vásárlói réteg, melynek fogyasztásában a bioélelmiszereknek kiemelt szerepük van. Az organikus gazdálkodás egyik fontos szegmense a magyarországi fogyasztók között még kevésbé ismert, de a bio gazdák körében népszerű biodinamikus gazdálkodás. Minősítő intézménye a Demeter International, melynek védjegye magas minőséget és garantáltan ökológiai eredetet jelentő üzenetet hordoz a fogyasztók felé. A biodinamikus gazdálkodást folytató vállalkozások száma és mezőgazdasági területeik nagysága folyamatos emelkedő tendenciát mutat a világban, a termelési módszer egyre népszerűbb. Jelen tanulmányban a biodinamikus gazdálkodást folytató országok statisztikai módszerekkel történő összehasonlítását mutajuk be, ezen belül is kizárólag a Demeter minősítéssel rendelkező vállalkozások, területek adatait használva fel. Kutatási céljaink között szerepel továbbá a biodinamikus gazdálkodásra jellemző nemzetközi trendek, változások nyomon követése, összevetése, illetve a Demeter minősítéssel rendelkező biodinamikus gazdálkodást folytató országok esetében a jólét és a biodinamikus gazdálkodás elterjedtsége közötti összefüggések feltárása. ---------------------------- A much sought after area of our time is the relationship between health and nutrition. A conscious purchasing layer was created, and the consumption of this customer layer, organic food plays a prominent role. One of the important segments of organic farming is biodynamic agriculture, which is less well-known among Hungarian consumers, but it is popular among organic farmers. Its certification institution is Demeter International. Demeter trademark has a high quality and guaranteed organic source message to consumers. The number of businesses in biodynamic farming and the size of their agricultural areas are constantly increasing in the world, and the production method is becoming increasingly popular. This study presents the comparison of countries with biodynamic farming by using statistical methods, focusing on data of companies and areas with Demeter qualification. Among my research goals are also the follow-up and comparison of international trends, changes in biodynamic farming, and showing the relationships between prosperity and biodynamic agriculture in Demeter certified countries.
WIMP Cogenesis for Asymmetric Dark Matter and the Baryon Asymmetry
Creators: name: Cui, Yanou
name: Shamma, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a new mechanism where asymmetric dark matter (ADM) and the baryon asymmetry are both generated in the same decay chain of a metastable weakly interacting massive particle (WIMP) after its thermal freeze-out. Dark matter and baryons are connected by a generalized baryon number that is conserved, while the DM asymmetry and baryon asymmetry compensate each other. This unified framework addresses the DM-baryon coincidence while inheriting the merit of the conventional WIMP miracle in predicting relic abundances of matter. Examples of renormalizable models realizing this scenario are presented. These models generically predict ADM with sub-GeV to GeV-scale mass that interacts with Standard Model quarks or leptons, thus rendering potential signatures at direct detection experiments sensitive to low mass DM. Other interesting phenomenological predictions are also discussed, including: LHC signatures of new intermediate particles with color or electroweak charge and DM induced nucleon decay; the long-lived WIMP may be within reach of future high energy collider experiments.
description: 21 pages, 16 figures, 1 appendix. Freezeout mechanism changed. Matches version published in JHEP
Neogyptis Pleijel, Rouse, Sundkvist & Nygren 2012
Creators: name: Salazar-Vallejo, Sergio I.
name: Carrera-Parra, Luis F.
name: Muir, Alexander I.
name: León-González, Jesús Angel De
name: Piotrowski, Christina
name: Sato, Masanori
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Hesionidae
Neogyptis

description: Neogyptis Pleijel, Rouse, Sundkvist & Nygren, 2012 hongkongensis Pleijel, Rouse, Sundkvist & Nygren, 2012: Hong Kong, Cape d’Aquilar, Lobster Bay (22°12.4′N, 114°15.5′E). SIO 2496, 2497
description: Published as part of Salazar-Vallejo, Sergio I., Carrera-Parra, Luis F., Muir, Alexander I., León-González, Jesús Angel De, Piotrowski, Christina & Sato, Masanori, 2014, Polychaete species (Annelida) described from the Philippine and China Seas, pp. 1-68 in Zootaxa 3842 (1) on page 18, DOI: 10.11646/zootaxa.3842.1.1, http://zenodo.org/record/4928482
Efficient excitation of cavity resonances of subwavelength metallic gratings
Creators: name: Quemerais, P.
name: Barbara, A.
name: Leperchec, J.
name: Lopez-Rios, T.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: One dimensional rectangular metallic gratings enable enhanced transmission of light for specific resonance frequencies. Two kinds of modes participating to enhanced transmission have already been demonstrated : (i) waveguide modes and (ii) surface plasmon polaritons (SPP). Since the original paper of Hessel and Oliner \cite{hessel} pointing out the existence of (i), no progress was made in their understanding. We present here a carefull analysis, and show that the coupling between the light and such resonances can be tremendously improved using an {\it evanescent} wave. This leads to enhanced localisation of light in cavities, yielding, in particular, to a very selective light transmission through these gratings.
description: 4 pages, 5 figures, submitted to Phys. Rev. Lett
A PRINCIPAL COMPONENTS APPROACH TO SOME MULTIVARIATE ESTIMATION PROBLEMS WITH INCOMPLETE DATA
Creators: name: Asproudis, Spyros Christoforou
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 49
subject: Mathematical sciences
classificationCode: 4905
subject: Statistics
subject: FOS: Mathematics

description: The maximum likelihood estimators of the parameters of a multivariate normal distribution based on monotone samples and their first two moments were derived in the literature. When multicollinearity is present, these estimators are unreliable. By using a subset of the sample covariance matrix's principal components we construct estimators free of the distortions caused by multicollinearity. The new estimators are shown to be consistent and asymptotically unbiased. We derive the distributions of various functions of the sample covariance matrix pertaining to those estimators and obtain closed form expressions for the first two moments of the estimators based on principal components. These expressions, however, are not easily evaluated. We also examine the multivariate regression problem in monotone samples. When there is no indication of multicollinearity, we propose a set of estimators for the regression parameters which are shown to be consistent, asymptotically unbiased and to have smaller variances than the usual least squares regression estimators. Principal component regression is often applied in cases of highly correlated "independent" variables. The technique is extended in monotone multicollinear samples. The estimators produced have some optimum properties. Results related to the development of the principal components' estimators and examples are also considered.
Reversible magnetization of MgB2 single crystals with a two-gap nature
Creators: name: Kang, Byeongwon
name: Kim, Heon-Jung
name: Park, min-Seok
name: Kim, Kyung-Hee
name: Lee, Sung-Ik
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present reversible magnetization measurements on MgB2 single crystals in magnetic fields up to 2.5 T applied parallel to the crystal's c-axis. This magnetization is analyzed in terms of the Hao-Clem model, and various superconducting parameters, such as the critical fields [Hc(0) and Hc2(0)], the characteristic lengths [xi(0) and lambda(0)], and the Ginzburg-Landau parameter, kappa, are derived. The temperature dependence of the magnetic penetration depth, lambda(T), obtained from the Hao-Clem analysis could not be explained by theories assuming a single gap. Our data are well described by using a two-gap model.
description: 20 pages, 1 table, 4 figures, will be published in Phys. Rev. B