cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exploiting Spherical Projections To Generate Human-Like Wrist Pointing Movements
Creators: name: Tiseo, Carlo
name: Charitos, Sydney Rebecca
name: Mistry, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The mechanism behind the generation of human movements is of great interest in many fields (e.g. robotics and neuroscience) to improve therapies and technologies. Optimal Feedback Control (OFC) and Passive Motion Paradigm (PMP) are currently two leading theories capable of effectively producing human-like motions, but they require solving nonlinear inverse problems to find a solution. The main benefit of using PMP is the possibility of generating path-independent movements consistent with the stereotypical behaviour observed in humans, while the equivalent OFC formulation is path-dependent. Our results demonstrate how the path-independent behaviour observed for the wrist pointing task can be explained by spherical projections of the planar tasks. The combination of the projections with the fractal impedance controller eliminates the nonlinear inverse problem, which reduces the computational cost compared to previous methodologies. The motion exploits a recently proposed PMP architecture that replaces the nonlinear inverse optimisation with a nonlinear anisotropic stiffness impedance profile generated by the Fractal Impedance Controller, reducing the computational cost and not requiring a task-dependent optimisation.
The Role of Self-Esteem in the Relationship Between Sexual Minority Status and Depressive Symptoms
Creators: name: Ng, Diane
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Public health
subject: Psychology
subject: FOS: Psychology
subject: GLBT studies
subject: adolescence
subject: depression
subject: depressive symptoms
subject: LGBT
subject: self-esteem
subject: sexual minority

description: Sexual minority (SM) youth have been found to experience higher rates of depression and depressive symptoms compared with heterosexual youth. It has been suggested that there are mediators in the pathway between stigma-related stress and psychopathology, such as self-esteem. This study was interested in investigating whether self-esteem is a mediator between SM status by romantic attraction and the outcome depressive symptoms during the transition from adolescence to adulthood, and whether sex moderated this mediation. Results showed that those who were both-sex attracted had significantly higher depressive symptoms than their opposite-sex attracted counterparts (β=0.04,p=0.049). Further, findings showed that self-esteem is a mediator in the pathway between both-sex attraction and depressive symptoms (p=0.007). Although females were found to have higher depressive symptoms than males, no significant interaction with sexual minority status was found. These results can have implications for possible interventions to reduce depressive symptomatology for sexual minority groups transitioning into adulthood.
The Association between Literacy and Work Performance as Mediated by Depression
Creators: name: Foss, Lindsey E.
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Individual & family studies
subject: Adult education
subject: Psychology
subject: FOS: Psychology
subject: adult literacy
subject: depression
subject: job performance
subject: literacy
subject: mental health
subject: work performance

description: Approximately 90 million Americans are functionally illiterate, meaning that they cannot accomplish basic tasks such as interpreting a bus schedule or filling in an order form (Lincoln et al., 2008). Low levels of literacy have been associated with poor health outcomes, including anxiety and depression, in addition to poor work performance. This study examined the possible mediating role of depression in the association between literacy and work performance, using a nationally representative sample of young adults from the National Longitudinal Survey of Youth - 1997. The results indicated that after controlling for race and gender there was a significant association between emotional distress and the degree to which emotional problems limited work performance. The trend toward an association between literacy and the degree to which emotional distress affects work did not hold once race and sex were controlled. Suggestions are provided for future research that can more thoroughly test the effects of literacy on work performance.
The Role of Cross-cultural Experiences and Ethnic Identity in Transracial Adoptees' Self-esteem
Creators: name: Stephenson, Jocylynn Briann
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Individual & family studies
subject: Adolescents
subject: Adoption
subject: Ethnic Identity
subject: Families
subject: Minorities
subject: Self-esteem

description: Research into mental health outcomes of minority transracial adoptees has been fueled by debate over white parents' ability to prepare minority children for experiences of individual and institutional racism.  However, studies show transracial adoptees do not differ from others in self-esteem, one criterion used to gauge mental health.  Among minorities, ethnic identity is correlated with self-esteem, but studies show that transracially adopted adolescents often face ambiguous ethnic identity.  Cross-cultural experiences have proven to increase ethnic identity in minorities, but little research has been done on their effect among transracial adoptees. The current study explored whether cross-cultural experiences bolster self-esteem in minority transracial adoptees through mediation of adoptees' ethnic identity.  One-hundred-three transracially adopted minority adolescents completed online self-report surveys.  Results indicated a significant negative link between cross-cultural experiences and ethnic identity and a moderately significant negative link between cross-cultural experiences and self-esteem in this population.  Findings and possible explanations are discussed.
Cross sections of e+e- --> gamma VV and e+e- --> gamma gamma V
Creators: name: Zhu, K.
name: Yuan, C. Z.
name: Ping, R. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Cross sections of the e+e- annihilation into one photon plus two vector mesons, such as J/psi rho, J/psi phi, and rho phi at the center of mass energy \sqrt{s}=10.58GeV are calculated. These shed light on the measurement of the e+e- annihilation cross section via radiative return in B-factories. At another center of mass energy \sqrt{s}=3.097GeV, namely the J/psi resonance peak, the processes e+e- --> gamma VV and e+e- --> gamma gamma V (with V being rho, omega, or phi) are calculated with similar method. These calculations give estimation of the background levels in the study of radiative or double radiative decays of J/psi.
description: 9 pages, 4 figures, revtex
On the Birman-Schwinger principle applied to (-Delta + m^2)^(1/2) - m
Creators: name: Maceda, Marco
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81Q10

description: The condition for E = 0 to be an eigenvalue of the operator (-Delta + m^2)^(1/2) -m + l V is obtained through the use of the Birman-Schwinger principle. By setting E=-a^2 and using the analyticity of the corresponding Birman-Schwinger kernel, the series development of (l^(-1))(a) is obtained up to second order on a.
description: revised version published in JMP, corrected typos
TESS Hunt for Young and Maturing Exoplanets (THYME) IV: Three small planets orbiting a 120 Myr-old star in the Pisces--Eridanus stream
Creators: name: Newton, Elisabeth R.
name: Mann, Andrew W.
name: Kraus, Adam L.
name: Livingston, John H.
name: Vanderburg, Andrew
name: Curtis, Jason L.
name: Thao, Pa Chia
name: Hawkins, Keith
name: Wood, Mackenna L.
name: Rizzuto, Aaron C.
name: Soubkiou, Abderahmane
name: Tofflemire, Benjamin M.
name: Zhou, George
name: Crossfield, Ian J. M.
name: Pearce, Logan A.
name: Collins, Karen A.
name: Conti, Dennis M.
name: Tan, Thiam-Guan
name: Villeneuva, Steven
name: Spencer, Alton
name: Dragomir, Diana
name: Quinn, Samuel N.
name: Jensen, Eric L. N.
name: Collins, Kevin I.
name: Stockdale, Chris
name: Cloutier, Ryan
name: Hellier, Coel
name: Benkhaldoun, Zouhair
name: Ziegler, Carl
name: Briceño, César
name: Law, Nicholas
name: Benneke, Björn
name: Christiansen, Jessie L.
name: Gorjian, Varoujan
name: Kane, Stephen R.
name: Kreidberg, Laura
name: Morales, Farisa Y.
name: Werner, Michael W
name: Twicken, Joseph D.
name: Levine, Alan M.
name: Ciardi, David R.
name: Guerrero, Natalia M.
name: Hesse, Katharine
name: Quintana, Elisa V.
name: Shiao, Bernie
name: Smith, Jeffrey C.
name: Torres, Guillermo
name: Ricker, George R.
name: Vanderspek, Roland
name: Seager, Sara
name: Winn, Joshua N.
name: Jenkins, Jon M.
name: Latham, David W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Young exoplanets can offer insight into the evolution of planetary atmospheres, compositions, and architectures. We present the discovery of the young planetary system TOI 451 (TIC 257605131, Gaia DR2 4844691297067063424). TOI 451 is a member of the 120-Myr-old Pisces--Eridanus stream (Psc--Eri). We confirm membership in the stream with its kinematics, its lithium abundance, and the rotation and UV excesses of both TOI 451 and its wide binary companion, TOI 451 B (itself likely an M dwarf binary). We identified three candidate planets transiting in the TESS data and followed up the signals with photometry from Spitzer and ground-based telescopes. The system comprises three validated planets at periods of 1.9, 9.2 and 16 days, with radii of 1.9, 3.1, and 4.1 Earth radii, respectively. The host star is near-solar mass with V=11.0 and H=9.3 and displays an infrared excess indicative of a debris disk. The planets offer excellent prospects for transmission spectroscopy with HST and JWST, providing the opportunity to study planetary atmospheres that may still be in the process of evolving.
description: 20 pages, appendix on UV excess
Emission-line Diagnostics of Low Metallicity AGN
Creators: name: Groves, Brent
name: Heckman, Timothy
name: Kauffmann, Guinevere
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Current emission-line based estimates of the metallicity of active galactic nuclei (AGN) at both high and low redshifts indicate that AGN have predominantly solar to supersolar metallicities. This leads to the question: do low metallicity AGN exist? In this paper we use photoionization models to examine the effects of metallicity variations on the narrow emission lines from an AGN. We explore a variety of emission-line diagnostics that are useful for identifying AGN with low metallicity gas. We find that line ratios involving [NII] are the most robust metallicity indicators in galaxies where the primary source of ionization is from the active nucleus. Ratios involving [SII] and [OI] are strongly affected by uncertainties in modelling the density structure of the narrow line clouds. To test our diagnostics, we turn to an analysis of AGN in the Sloan Digital Sky Survey (SDSS). We find a clear trend in the relative strength of [NII] with the mass of the AGN host galaxy. The metallicity of the ISM is known to be correlated with stellar mass in star-forming galaxies; our results indicate that a similar trend exists for AGN. We also find that the best-fit models for typical Seyfert narrow line regions have supersolar abundances. Although there is a mass-dependent range of a factor of 2-3 in the NLR metallicities of the AGN in our sample, AGN with sub-solar metallicities are very rare in the SDSS. Out of a sample of ~23000 Seyfert 2 galaxies we find only ~40 clear candidates for AGN with NLR abundances that are below solar.
description: Accepted for publication in MNRAS; article with full resolution figures avaialble at http://www.mpa-garching.mpg.de/~brent/publications/lowZ.pdf
Virasoro representations and fusion for general augmented minimal models
Creators: name: Eberle, Holger
name: Flohr, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we present explicit results for the fusion of irreducible and higher rank representations in two logarithmically conformal models, the augmented c_{2,3} = 0 model as well as the augmented Yang-Lee model at c_{2,5} = -22/5. We analyse their spectrum of representations which is consistent with the symmetry and associativity of the fusion algebra. We also describe the first few higher rank representations in detail. In particular, we present the first examples of consistent rank 3 indecomposable representations and describe their embedding structure. Knowing these two generic models we also conjecture the general representation content and fusion rules for general augmented c_{p,q} models.
description: 42 pages, 17 pages appendix, 5 figures
Early Phonological Predictors of Toddler Language Outcomes
Creators: name: Gerhold, Kayla
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Speech therapy
subject: language acquisition
subject: language development
subject: language outcomes
subject: phonology

description: Several studies have explored relationships between children's early phonological development and later language performance. This literature has included a more recent focus on the potential for early vocalization profiles in infancy to predict later language outcomes, including those characterized by delay or disorder.  The present study examines phonetic inventories and syllable structure patterns in a large cohort of infants as they relate to expressive language outcomes at 2 years of age. Results suggest that as early as 11 months, phonetic inventory and mean syllable structure level are related to two year expressive language outcomes (MLU, MCDI, and types).  If specific patterns of production can be established for a typically-developing population then this will additionally inform clinical decision-making.  Possible applications are discussed.
Resonant Raman scattering of single molecules under strong cavity coupling and ultrastrong optomechanical coupling in plasmonic resonators: phonon-dressed polaritons
Creators: name: Hughes, Stephen
name: Settineri, Alessio
name: Savasta, Salvatore
name: Nori, Franco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Plasmonic dimer cavities can induce extreme electric-field hot spots that allow one to access ultrastrong coupling regimes using Raman-type spectroscopy on single vibrating molecules. Using a generalized master equation, we study resonant Raman scattering in the strong coupling regime of cavity-QED, when also in the vibrational ultrastrong coupling regime, leading to "phonon-dressed polaritons". The master equation rigorously includes spectral baths for the cavity and vibrational degrees of freedom, as well as a pure dephasing bath for the resonant two-level system, which play a significant role. Employing realistic parameters for gold dimer cavity modes, we investigate the emission spectra in several characteristic strong-coupling regimes, leading to extremely rich spectral resonances due to an interplay of phonon-modified polariton states and bath-induced resonances. We also show explicitly the failure of the standard master equation in these quantum nonlinear regimes.
THE EFFECT OF DUAL INCOME CLINIC COUPLES' RELATIVE INCOMES ON PARTNERS' ATTEMPTS TO EXERT POWER, DEPRESSION, AND RELATIONSHIP SATISFACTION, AS MODERATED BY GENDER IDEOLOGIES
Creators: name: Brown, Elizabeth Marie
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: subject: Individual & family studies

description: This study compared 149 dual income full-time employed heterosexual couples in which the female partner earns more with those in which the male partner earns more, regarding the degree to which partners perceive each other as making attempts to exert power, the severity of their depression symptoms, and their levels of relationship satisfaction. It was hypothesized that men who make less money than their female partner will make more attempts to exert power, more depressive symptoms, and lower relationship satisfaction. It was also hypothesized gender role ideology will moderate the association between income discrepancy and the 3 dependent variables. Furthermore three research questions were explored. The hypotheses were tested with two-way ANCOVAs, Pearson correlations, and paired t-tests. One significant interaction effect was found for female depression, which was a reverse pattern then expected. Gender role ideology did not moderate the association between income discrepancy and the 3 dependent variables.
Exact Solutions for Equations of Bose-Fermi Mixtures in One-Dimensional Optical Lattice
Creators: name: Kostov, Nikolay A.
name: Gerdjikov, Vladimir S.
name: Valchev, Tihomir I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We present two new families of stationary solutions for equations of Bose-Fermi mixtures with an elliptic function potential with modulus $k$. We also discuss particular cases when the quasiperiodic solutions become periodic ones. In the limit of a sinusoidal potential ($k\to 0$) our solutions model a quasi-one dimensional quantum degenerate Bose-Fermi mixture trapped in optical lattice. In the limit $k\to 1$ the solutions are expressed by hyperbolic function solutions (vector solitons). Thus we are able to obtain in an unified way quasi-periodic and periodic waves, and solitons. The precise conditions for existence of every class of solutions are derived. There are indications that such waves and localized objects may be observed in experiments with cold quantum degenerate gases.
description: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
The Accuracy and precision of ORP monitoring in bio-nutrient removal processes
Creators: name: Zhou, Jianpeng
Publisher: name: University of British Columbia
Year: 2008

description: It is important to have complete denitrification in the anoxic zone to provide good conditions for phosphorus removal in a bio-nutrient removal process. The objective of this research was to examine the possibility of using oxidation reduction potential (ORP) as a means of assessing the completeness of denitrification in the anoxic zone. First, the reliability and sensitivity of ten probes were tested and evaluated. Next, ORP values in complete denitrification conditions from biological systems with different initial NO concentrations and denitrification rates were collected and the usefulness ofthese redox values was assessed. Batch testing was used in this research. The Remote Data Acquisition and Control System, an automated data log-in system, was used to collect redox values. ORP probes were tested in quinhydrone buffer solutions. The biological systems in the anoxic testswere proportional combinations of mixed liquors from the anaerobic zone, aerobic zone, and the return sludge line of the UBC bio-nutrient removal process, so that different initial NO concentrations were obtained. Sodium acetate (NaAc) was added to the systems of carbon addition tests in order to achieve different denitrification rates. The probe test results indicated that measured ORP values were linearly related to standard ORP values of the tested quinhydrone solutions. Adjustment factors were developed based on this relationship for each probe. In the ORP vs time curves of biological batch tests, knees characteristic of the minimum first derivative were observed. At these knees, the NO removal efficiencies were found to be 92.6 % on average in anoxic tests, and to be 96.2 % in carbon addition tests. Redox values at the knees had an average of -28 my (adjusted value), with a standard deviation of +8 my (adjusted value). When redox values reached -44 my (adjustedvalue), the lower limit of the 95% confidence interval, the biological system was still a good environment for phosphorus removal in the process. Adjusting measured redox values is not necessary in order to achieve the conclusion about using ORP values to control a denitrification process. The -42 my, the lower limit of the 95% confidence interval from measured redox values, is suggested to be used as a denitrification control guideline. However, probe testing is still considered necessary. It was concluded that ORP monitoring can be used as a control tool in a denitrification process. Probe test procedures, including testing solutions, adjustment factors development, and testing frequency are recommended in the research.
A new method of determining the initial size and Lorentz factor of gamma-ray burst fireballs using a thermal emission component
Creators: name: Pe'er, Asaf
name: Ryde, Felix
name: Wijers, Ralph A. M. J.
name: Mészáros, Peter
name: Rees, Martin J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In recent years increasing evidence has emerged for a thermal component in the gamma- and X-ray spectrum of the prompt emission phase in gamma-ray bursts. The temperature and flux of the thermal component show a characteristic break in the temporal behavior after a few seconds. We show here, that measurements of the temperature and flux of the thermal component at early times (before the break) allow the determination of the values of two of the least restricted fireball model parameters: the size at the base of the flow and the outflow bulk Lorentz factor. Relying on the thermal emission component only, this measurement is insensitive to the inherent uncertainties of previous estimates of the bulk motion Lorentz factor. We give specific examples of the use of this method: for GRB970828 at redshift z=0.9578, we show that the physical size at the base of the flow is r_0 = (2.9+-1.8)*10^8 Y_0^{-3/2} cm and the Lorentz factor of the flow is Gamma = (305\+-28) Y_0^{1/4}, and for GRB990510 at z=1.619, r_0=(1.7+-1.7)*10^8 Y_0^{-3/2} cm and Gamma=(384+-71) Y_0^{1/4}, where Y = 1 Y_0 is the ratio between the total fireball energy and the energy emitted in gamma- rays.
description: Discussion added on gamma-ray emission efficiency. Accepted for publication in Ap.J. Lett
Spin structure factors of doped monolayer Germanene in the presence of spin-orbit coupling
Creators: name: Azizi, Farshad
name: Rezania, Hamed
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this paper, we present a Kane-Mele model in the presence of magnetic field and next nearest neighbors hopping amplitudes for investigations of the spin susceptibilities of Germanene layer. Green's function approach has been implemented to find the behavior of dynamical spin susceptibilities of Germanene layer within linear response theoryand in the presence of magnetic field and spin-orbit coupling at finite temperature. Our results show the magnetic excitation mode for both longitudinal and transverse components of spin tends to higher frequencies with spin-orbit coupling strength. Moreover the frequency positions of sharp peaks in longitudinal dynamical spin susceptibility are not affected by variation of magnetic field while the peaks in transverse dynamical susceptibility moves to lower frequencies with magnetic field. The effects of electron doping on frequency behaviors of spin susceptibilities have been addressed in details. Finally the temperature dependence of static spin structure factors due to the effects of spin-orbit coupling, magnetic field and chemical potential has been studied.
Systematic Errors in Cosmic Microwave Background Interferometry
Creators: name: Bunn, Emory F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Cosmic microwave background (CMB) polarization observations will require superb control of systematic errors in order to achieve their full scientific potential, particularly in the case of attempts to detect the B modes that may provide a window on inflation. Interferometry may be a promising way to achieve these goals. This paper presents a formalism for characterizing the effects of a variety of systematic errors on interferometric CMB polarization observations, with particular emphasis on estimates of the B-mode power spectrum. The most severe errors are those that couple the temperature anisotropy signal to polarization; such errors include cross-talk within detectors, misalignment of polarizers, and cross-polarization. In a B mode experiment, the next most serious category of errors are those that mix E and B modes, such as gain fluctuations, pointing errors, and beam shape errors. The paper also indicates which sources of error may cause circular polarization (e.g., from foregrounds) to contaminate the cosmologically interesting linear polarization channels, and conversely whether monitoring of the circular polarization channels may yield useful information about the errors themselves. For all the sources of error considered, estimates of the level of control that will be required for both E and B mode experiments are provided. Both experiments that interfere linear polarizations and those that interfere circular polarizations are considered. The fact that circular experiments simultaneously measure both linear polarization Stokes parameters in each baseline mitigates some sources of error.
description: 19 pages, 9 figures, submitted to Phys. Rev. D
Mixed State Entanglement Classification using Artificial Neural Networks
Creators: name: Harney, Cillian
name: Paternostro, Mauro
name: Pirandola, Stefano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Reliable methods for the classification and quantification of quantum entanglement are fundamental to understanding its exploitation in quantum technologies. One such method, known as Separable Neural Network Quantum States (SNNS), employs a neural network inspired parameterisation of quantum states whose entanglement properties are explicitly programmable. Combined with generative machine learning methods, this ansatz allows for the study of very specific forms of entanglement which can be used to infer/measure entanglement properties of target quantum states. In this work, we extend the use of SNNS to mixed, multipartite states, providing a versatile and efficient tool for the investigation of intricately entangled quantum systems. We illustrate the effectiveness of our method through a number of examples, such as the computation of novel tripartite entanglement measures, and the approximation of ultimate upper bounds for qudit channel capacities.
description: 14 pages, 7 figures
Ηγεσία και επιλογή στελεχών στη διοίκηση της εκπαίδευσης
Creators: name: Πετροπούλου, Δήμητρα Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Κοινωνιολογία του Δικαίου
Διοίκηση της Εκπαίδευσης
Ηγεσία
Sociology of Law
Educational Management
Leadership

description: Σκοπός της διπλωματικής εργασίας είναι η μελέτη της ηγεσίας και της επιλογής των στελεχών στη διοίκηση της εκπαίδευσης. Εξετάσαμε τους κοινωνικούς θεσμούς της διοίκησης και της εκπαίδευσης υπό το πρίσμα της κοινωνιολογίας του δικαίου. Στη συνέχεια παρουσιάσαμε την ιστορική εξέλιξη του θεσμού της ηγεσίας/διοίκησης σε γραφειοκρατικούς οργανισμούς, τις σύγχρονες μορφές ηγεσίας, τις βασικές ηγετικές ικανότητες και την ανάπτυξη των δεξιοτήτων διοίκησης και των ηγετικών χαρακτηριστικών στα στελέχη της διοίκησης. Ένα άλλο θέμα που θίξαμε αφορά στην επιλογή στελεχών στη διοίκηση της εκπαίδευσης και πιο συγκεκριμένα στη διαδικασία και στα κριτήρια επιλογής όπως καταγράφονται στα βασικά νομοθετικά κείμενα για την επιλογή στελεχών στη δημόσια εκπαίδευση. Καταλήξαμε σε κάποια κοινωνιολογικά συμπεράσματα από τη συγκριτική μελέτη των νομοθετικών διατάξεων για την επιλογή των στελεχών στη διοίκηση της εκπαίδευσης
description: The aim of the present thesis is the study of leadership and the selection of executive officers in educational management. We examined the social institutions of public administration and public education in light of the sociology of law. Then we present the historical evolution of leadership and public administration in government agencies, modern forms of leadership, leadership abilities and developing administrative skills and leading features. Another goal of this study is to examine through legislative texts, the procedure and selection criteria of executive officers selection in educational management. We have reached sociological conclusions by comparative study of legislative provisions for executive officers selection in educational management
A mathematical analysis of the evolution of perturbations in a modified Chaplygin gas model
Creators: name: Costa, Sandro Silva e
name: Ujevic, Maximiliano
name: Santos, Alesandro Ferreira dos
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: One approach in modern cosmology consists in supposing that dark matter and dark energy are different manifestations of a single `quartessential' fluid. Following such idea, this work presents a study of the evolution of perturbations of density in a flat cosmological model with a modified Chaplygin gas acting as a single component. Our goal is to obtain properties of the model which can be used to distinguish it from another cosmological models which have the same solutions for the general evolution of the scale factor of the universe, without the construction of the power spectrum. Our analytical results, which alone can be used to uniquely characterize the specific model studied in our work, show that the evolution of the density contrast can be seen, at least in one particular case, as composed by a spheroidal wave function. We also present a numerical analysis which clearly indicates as one interesting feature of the model the appearence of peaks in the evolution of the density constrast.
description: 21 pages, accepted for publication in General Relativity and Gravitation
Additional file 1 of Impact of charge patches on tumor disposition and biodistribution of therapeutic antibodies
Creators: name: Stüber, Jakob C.
name: Rechberger, Karin F.
name: Miladinović, Saša M.
name: Pöschinger, Thomas
name: Zimmermann, Tamara
name: Villenave, Remi
name: Eigenmann, Miro J.
name: Kraft, Thomas E.
name: Shah, Dhaval K.
name: Kettenberger, Hubert
name: Richter, Wolfgang F.
Publisher: name: figshare
Year: 2022
Subjects: subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: Additional file 1: Supplemental Table 1. Serum pharmacokinetic parameters in non-tumor bearing mice for charge-patch antibody variants as obtained by noncompartmental analysis.
Elliot: a Comprehensive and Rigorous Framework for Reproducible Recommender Systems Evaluation
Creators: name: Anelli, Vito Walter
name: Bellogín, Alejandro
name: Ferrara, Antonio
name: Malitesta, Daniele
name: Merra, Felice Antonio
name: Pomo, Claudio
name: Donini, Francesco Maria
name: Di Noia, Tommaso
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Recommender Systems have shown to be an effective way to alleviate the over-choice problem and provide accurate and tailored recommendations. However, the impressive number of proposed recommendation algorithms, splitting strategies, evaluation protocols, metrics, and tasks, has made rigorous experimental evaluation particularly challenging. Puzzled and frustrated by the continuous recreation of appropriate evaluation benchmarks, experimental pipelines, hyperparameter optimization, and evaluation procedures, we have developed an exhaustive framework to address such needs. Elliot is a comprehensive recommendation framework that aims to run and reproduce an entire experimental pipeline by processing a simple configuration file. The framework loads, filters, and splits the data considering a vast set of strategies (13 splitting methods and 8 filtering approaches, from temporal training-test splitting to nested K-folds Cross-Validation). Elliot optimizes hyperparameters (51 strategies) for several recommendation algorithms (50), selects the best models, compares them with the baselines providing intra-model statistics, computes metrics (36) spanning from accuracy to beyond-accuracy, bias, and fairness, and conducts statistical analysis (Wilcoxon and Paired t-test). The aim is to provide the researchers with a tool to ease (and make them reproducible) all the experimental evaluation phases, from data reading to results collection. Elliot is available on GitHub (https://github.com/sisinflab/elliot).
description: Published at SIGIR 2021, 10 pages, 1 figure
Statistical aspects of the fractional stochastic calculus
Creators: name: Tudor, Ciprian A.
name: Viens, Frederi G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 62M09 (Primary); 60G18, 60H07, 60H10 (Secondary)

description: We apply the techniques of stochastic integration with respect to fractional Brownian motion and the theory of regularity and supremum estimation for stochastic processes to study the maximum likelihood estimator (MLE) for the drift parameter of stochastic processes satisfying stochastic equations driven by a fractional Brownian motion with any level of Hölder-regularity (any Hurst parameter). We prove existence and strong consistency of the MLE for linear and nonlinear equations. We also prove that a version of the MLE using only discrete observations is still a strongly consistent estimator.
description: Published at http://dx.doi.org/10.1214/009053606000001541 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Methodology in our madness
Creators: name: Lynn, Peter
name: Schnell, Rainer
Publisher: name: European Survey Research Association
Year: 2007
Subjects: survey methodology

description: It is a great pleasure to present the first issue of a new
journal. However, the more sceptical reader might wonder
whether yet another new journal is really needed. In this
editorial we attempt to justify our self-indulgence and to
set out our vision for Survey Research Methods.
description: Survey Research Methods, Vol 1, No 1 (2007)
Minimizing survey refusal and noncontact rates: do our efforts pay off?
Creators: name: Heerwegh, Dirk
name: Abts, Koen
name: Loosveldt, Geert
Publisher: name: European Survey Research Association
Year: 2007
Subjects: Survey research; nonresponse rate; nonresponse error; data quality

description: This study investigates the link between the effort undertaken to collect survey data and the nonresponse error on a key survey estimate. For this purpose a threefold analysis was conducted. First, the level of nonresponse error and its composition is charted. Second, it is investigated whether these levels change throughout the fieldwork period. This helps answering the question whether collecting more data implies higher data quality. This type of analysis also provides a possible framework for a dynamic process control during the fieldwork period. A third and final analysis links interviewer efforts (in terms of number of contact attempts) to nonresponse error and its composition. The results show that error due to noncontact is 2.6 times higher than error due to refusal, even though the refusal rate is almost two times higher than the noncontact rate. Also, the results suggest that collecting more data does not necessarily imply higher data quality and that a higher number of contact attempts does not markedly reduce the nonresponse error in absolute terms. The analysis uncovers the underlying process responsible for this latter finding.
description: Survey Research Methods, Vol 1, No 1 (2007)
Additional file 2 of Impact of charge patches on tumor disposition and biodistribution of therapeutic antibodies
Creators: name: Stüber, Jakob C.
name: Rechberger, Karin F.
name: Miladinović, Saša M.
name: Pöschinger, Thomas
name: Zimmermann, Tamara
name: Villenave, Remi
name: Eigenmann, Miro J.
name: Kraft, Thomas E.
name: Shah, Dhaval K.
name: Kettenberger, Hubert
name: Richter, Wolfgang F.
Publisher: name: figshare
Year: 2022
Subjects: subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: Additional file 2: Supplemental Figure 1. Residual plasma correction. (a-c) Levels of a vascular marker (infliximab) in serum (a) and tissues (b) were used to infer residual plasma contamination and calculate correction factors (c). Also shown is the plasma volume fraction derived from the data in (Shah and Betts 2012). (d) Relative contribution of the residual plasma fraction to the total tissue AUC in tumor-bearing Balb/c nude mice.
Clarifying Some Issues in the Regression Analysis of Survey Data
Creators: name: Kott, Phillip S.
Publisher: name: European Survey Research Association
Year: 2007
Subjects: Error term; standard linear model; extended linear model; nonignorable; sample

description: The literature offers two distinct reasons for incorporating sample weights into the estimation of linear regression coefficients from a model-based point of view. Either the sample selection is nonignorable or the model is incomplete. The traditional sample-weighted least-squares estimator can be improved upon when the sample selection is nonignorable, but not when the standard linear model fails and needs to be extended.
Conceptually, it can be helpful to view the realized sample as the result of a two-phase process. In the first phase, the finite population is drawn from a hypothetical superpopulation via simple random (cluster) sampling. In the second phase, the actual sample is drawn from the finite population. In the extended model, the parameters of this superpopulation are vague. Meansquared-error estimation can become problematic when the primary sampling units are drawn within strata using unequal probability sampling without replacement. This remains true even under the standard model when certain aspects of the sample design are nonignorable.
description: Survey Research Methods, Vol 1, No 1 (2007)
Time expansion chamber system for characterization of TWIST low energy muon beams
Creators: name: Hu, J.
name: Sheffer, G.
name: Davydov, Yu. I.
name: Gill, D. R.
name: Gumplinger, P.
name: Henderson, R. S.
name: Jamieson, B.
name: Lindsay, C.
name: Marshall, G. M.
name: Olchanski, K.
name: Olin, A.
name: Openshaw, R.
name: Selivanov, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A low mass time expansion chamber (TEC) has been developed to measure distributions of position and angle of the TRIUMF low energy surface muon beam used for the TWIST experiment. The experiment is a high precision measurement of muon decay and is dominated by systematic uncertainties, including the stability, reproducibility, and characterization of the beam. The distributions measured by two TEC modules are one essential ingredient of an accurate simulation of TWIST. The uncertainties, which are extracted through comparisons of data and simulation, must be known to assess potential systematic uncertainties of the TWIST results. The design criteria, construction, alignment, calibration, and operation of the TEC system are discussed, including experiences from initial beam studies. A brief description of the use of TEC data in the TWIST simulation is also included.
description: v. 2, with corrections and revised figures. 23 pages, 16 figures, accepted for publication in Nuclear Inst. and Methods in Physics Research, A
Additional file 3 of Impact of charge patches on tumor disposition and biodistribution of therapeutic antibodies
Creators: name: Stüber, Jakob C.
name: Rechberger, Karin F.
name: Miladinović, Saša M.
name: Pöschinger, Thomas
name: Zimmermann, Tamara
name: Villenave, Remi
name: Eigenmann, Miro J.
name: Kraft, Thomas E.
name: Shah, Dhaval K.
name: Kettenberger, Hubert
name: Richter, Wolfgang F.
Publisher: name: figshare
Year: 2022
Subjects: subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: Additional file 3: Supplemental Figure 2. Interstitial concentrations derived from total tissue levels in tumor-bearing Balb/c nude mice using the method of Chang et al. (Chang et al. 2020) suggest similar delivery to the tumor interstitium, while liver and muscle interstitial levels differ significantly.
Individual Social Capital and Its Measurement in Social Surveys
Creators: name: Yang, Keming
Publisher: name: European Survey Research Association
Year: 2007

description: With its popularity has come an unresolved issue about social capital: is it an individual or a collective property, or both? Many researchers take it for granted that social capital is collective, but most social surveys implicitly measure social capital at the individual level. After reviewing the definitions by Bourdieu, Coleman, and Putnam, I become to agree with Portes that social capital can be an individual asset and should be firstly analyzed as such; if social capital is to be analyzed as a collective property, then the analysis should explicitly draw on a clear definition of individual social capital. I thus define individual social capital as the features of social groups or networks that each individual member can access and use for obtaining further benefits. Four types of features are identified (basic, specific, generalized, and structural), and example formulations of survey questions are proposed. Following this approach, I then assess some survey questions organized under five themes commonly found in social surveys for measuring social capital: participation in organizations, social networks, trust, civic participation, and perceptions of local area. I conclude that most of these themes and questions only weakly or indirectly measure individual social capital; therefore, they should be strengthened with the conceptual framework proposed in this paper and complemented with the items used in independent surveys on social networks.
description: Survey Research Methods, Vol 1, No 1 (2007)
Ο Σπινόζα και η Λογική Της Ενορατικής Γνώσης
Creators: name: Μανελίδη, Χριστίνα Λάζαρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Σπινόζα
Ενορατική Γνώση
Γνώση των Ουσιών
Spinoza
Intuitive Knowledge
Knowledge of the Substanses

description: Στην παρούσα μελέτη εξετάζουμε τις θεμελιώδεις έννοιες του έργου του Σπινόζα, οι οποίες παρουσιάζονται κυρίως στο έργο του «Ηθική». Η «Ηθική» είναι ένα έργο το οποίο με αυστηρό και περιεκτικό τρόπο παρουσιάζει τις ιδέες του Σπινόζα, αναφορικά με τη Φύση, το Θεό, το ανθρώπινο πνεύμα και σώμα, τα ανθρώπινα πάθη και την ελευθερία, την ευδαιμονία και τη διαίσθηση της ανθρώπινης ύπαρξης. Η σκέψη του Σπινόζα ριζοσπαστική, προσεγγίζει ρηξικέλευθα την αρχαία ελληνική φιλοσοφική σκέψη και την παράδοση της αναγέννησης, ενώ έρχεται σε πλήρη ρήξη με τη σκέψη του Καρτέσιου. Μόνο τον 19ο αιώνα με το ρεύμα του ρομαντισμού και ιδεαλισμού θα μπορέσει να αποτιμηθεί το έργο του Σπινόζα και η συμβολή του στη φιλοσοφία. Στο 1ο Κεφάλαιο γίνεται αναφορά στα βιογραφικά στοιχεία, στην εργογραφία και στην αλληλογραφία του Σπινόζα. Στο Κεφάλαιο 2, αναπτύσσεται η φιλοσοφία του Σπινόζα, η θεωρία του σχετικά με τη γνώση και για τον ρόλο που παίζει στη φιλοσοφία. Επίσης αναφερόμαστε στη δεοντολογία του Σπινόζα καθώς και στο 1ο και 2ο είδος γνώσης. Ακολουθεί το 3ο Κεφάλαιο στο οποίο αναφέρεται αναλυτικά το 3ο είδος της γνώσης, η διαίσθηση, η αγάπη και η ευλογία. Η μελέτη ολοκληρώνεται με έναν επίλογο και με τη σχετική βιβλιογραφία
description: In this study we examine the fundamental concepts of Spinoza's work, which are presented mainly in his work "Ethics". "Ethics" is a work which, in a strict and inclusive way, presents the ideas of Spinoza, in terms of Nature, God, human spirit and body, human passions and freedom, bliss and the intuition of human existence. Spinoza's thought, radical, approaches the ancient Greek philosophical thought and the tradition of Renaissance, and comes to a complete rupture with the thought of Cartesius. Only in the 19th century with the stream of romance and idealism will be able to evaluate the work of Spinoza and its contribution to philosophy. In Chapter 1 reference is made to Biography, Spinoza, and Correspondence. In Chapter 2, Spinoza's philosophy, his theory of knowledge, and his role in philosophy are being developed. We also refer to Spinoza's ethics as well as to the 1st and 2nd kind of knowledge. Next Chapter 3 describes the third type of knowledge, intuition and love and blessing. The study is completed with an outline and with the relevant bibliography
Correlation between incoherent phase fluctuations and disorder in Y$_{1-x}$Pr$_x$Ba$_2$Cu$_3$O$_{7-δ}$ epitaxial films from Nernst effect measurements
Creators: name: Li, Pengcheng
name: Mandal, Soumen
name: Budhani, R. C.
name: Greene, R. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Measurements of Nernst effect, resistivity and Hall angle on epitaxial films of Y$_{1-x}$Pr$_x$Ba$_2$Cu$_3$O$_{7-δ}$(Pr-YBCO, 0$\leq x\leq$0.4) are reported over a broad range of temperature and magnetic field. While the Hall and resistivity data suggest a broad pseudogap regime in accordance with earlier results, these first measurements of the Nernst effect on Pr-YBCO show a large signal above the superconducting transition temperature(T$_c$). This effect is attributed to vortex-like excitations in the phase incoherent condensate existing above T$_c$. A correlation between disorder and the width of the phase fluctuation regime has been established for the YBCO family of cuprates, which suggests a T$_c\approx$110K for disorder-free YBa$_2$Cu$_3$O$_{7-δ}$.
description: 5 pages, 6 figures