cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Kirchhoff migration without phases
Creators: name: Bardsley, Patrick
name: Vasquez, Fernando Guevara
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Physics (math-ph)
subject: Optics (physics.optics)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35R30, 78A46

description: We present a simple, frequency domain, preprocessing step to Kirchhoff migration that allows the method to image scatterers when the wave field phase information is lost at the receivers, and only intensities are measured. The resulting imaging method does not require knowing the phases of the probing field or manipulating the phase of the wave field at the receivers. In a regime where the scattered field is small compared to the probing field, the problem of recovering the full-waveform scattered field from intensity data can be formulated as an embarrassingly simple least-squares problem. Although this only recovers the projection (on a known subspace) of the full-waveform scattered field, we show that, for high frequencies, this projection gives Kirchhoff images asymptotically identical to the images obtained with full waveform data. Our method can also be used when the source is modulated by a Gaussian process and autocorrelations are measured at an array of receivers.
description: 17 pages, 7 figures
Photovoltaics for Minimal Residential Units
Creators: name: Scognamiglio, A.
name: Panariello, S.
name: Stangherlin, P.
Publisher: name: WIP-Munich
Year: 2010
Subjects: PV Systems
PV Components for Buildings, PV Integration in Buildings

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 5110-5114
description: The paper reports about design strategies which can be used in dealing with the theme of the use of
Photovoltaics for a special kind of contemporary houses, the so called “minimal residential units”. These design
strategies will be described by referring to two master projects (thesis in Architecture Technology), focusing on
minimal residential units, and on the design of suitable building integrated photovoltaic systems.
The use of Photovoltaics focuses for both cases on the search for an optimal balance between the energetic
performance of the system and its visual appearance, and on the search for the technological matching with the other
building components. In the first case (Modulegno) photovoltaic and thermal systems are perfectly integrated into a
wooden building envelope. In the second case (modE2) a special photovoltaic element called “fisarmonica” (squeeze
box) has been designed. The result of the investigation is a better knowledge about potentialities and limits of using
PV in small scale architectures, such as the minimal residential units, and the development of two innovative PV
components for building integration.
Determining the Minority Carrier Lifetime in Crystalline Silicon Thin-Film Material
Creators: name: Rosenits, P.
name: Kopp, F.
name: Walter, D.
name: Reber, S.
name: Warta, W.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1373-1376
description: In this contribution the minority carrier lifetime in the electrically active epitaxial layer of crystalline
silicon thin-film material is investigated. The effective lifetime is successfully determined for a wide range of
different material qualities by means of microwave-detected photoconductance decay measurements. Subsequently,
an approach of separating the epitaxial bulk lifetime and recombination at the interface (between the epitaxial base
and the substrate) is presented. Finally, cell results from crystalline silicon thin-film solar cells are shown and
discussed. Based on these results, it is suggested that the cell process limits the performance of the cells, not the
electrical quality of the epitaxial layer. This statement is corroborated by results from cell simulation.
Challenges in Nuclear Structure Theory
Creators: name: Nazarewicz, Witold
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The goal of nuclear structure theory is to build a comprehensive microscopic framework in which properties of nuclei and extended nuclear matter, and nuclear reactions and decays can all be consistently described. Due to novel theoretical concepts, breakthroughs in the experimentation with rare isotopes, increased exchange of ideas across different research areas, and the progress in computer technologies and numerical algorithms, nuclear theorists have been quite successful in solving various bits and pieces of the nuclear many-body puzzle and the prospects are exciting. This article contains a brief, personal perspective on the status of the field.
description: 16 pages, 7 figures, Appeared in J. Phys. G Focus Issue on 40 years of research in Journal of Physics G
Direct Measurement of the Surface Recombination Velocity by Means of a Special Test Device
Creators: name: Daliento, S.
name: Costagliola, M.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2070-2073
description: In this paper we propose an analytical model to describe the operation of a simple test device to
directly measure the surface recombination velocity S of semiconductor interfaces. The model calculates the twodimensional
concentration of the carriers allowing the measurement of S. The effectiveness of both the analytical
model and the measurement technique has been proved by numerical two-dimensional simulations.
Finally test devices, whose surfaces have been subjected to various treatments, have been fabricated and
characterized. An assessment of the measurement error is also proposed.
HIV Stigma and Discrimination: Perspectives and Personal Experiences of Healthcare Providers in Yogyakarta and Belu, Indonesia
Creators: name: Ward, Paul
Publisher: name: Torrens University Australia
Year: 2023
Subjects: Health equity

description: Stigma and discrimination are major challenges facing People Living with HIV/AIDS (PLWHA) globally due to their HIV status. As part of a larger qualitative study in Yogyakarta and Belu, Indonesia, using in-depth interviews with 92 PLWHA (52 women, 40 men) and 20 healthcare providers, this paper describes perspectives and personal experiences of the 20 healthcare providers, relating to HIV stigma and discrimination toward PLWHA in both study settings. The healthcare providers were recruited from healthcare facilities providing HIV-related healthcare services, using a snowball sampling technique. A qualitative framework analysis was used to guide data analysis. Health stigma and discrimination framework guided the conceptualisation and discussion of the findings. The findings presented the views and perspectives of healthcare providers that HIV stigma and discrimination toward PLWHA still occurred within families, communities and healthcare settings. These were reflected in negative labelling, separation of personal belongings, avoidance, denial of treatment and rejection of PLWHA by healthcare providers, family and community members. Some healthcare providers reported that they had personally stigmatised and discriminated against PLWHA. A lack of knowledge about HIV, fear of contracting HIV, personal values, religious thoughts and sociocultural values and norms, were reported as drivers or facilitators behind this HIV-related stigma and discrimination. The findings indicate the importance of continued HIV/AIDS education for families, community members and healthcare providers, to raise awareness and to ensure that healthy and professional support systems are in place for PLWHA. The findings indicate the need to enhance improvement within the healthcare or HIV care system to adequately address the needs of PLWHA, which may facilitate their early initiation of HIV treatment and better treatment adherence and retention to increase Cluster of Differentiation 4 (CD4) count and suppress viral load. Future studies are also needed to explore the role that government and non-government institutions can play in improving health service delivery for people newly diagnosed with HIV and those living with HIV/AIDS.
Dephasing-Induced Stabilization of a Perfectly Conducting Channel in Disordered Graphene Nanoribbons with Zigzag Edges
Creators: name: Shimomura, Yuji
name: Takane, Yositake
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electron transport in a disordered graphene nanoribbon with zigzag edges is crucially affected by a perfectly conducting channel (PCC), which is stabilized if intervalley scattering is ignorable. In the presence of such a PCC, the dimensionless conductance g of the system decreases to the quantized value of g = 1 with increasing system length L. In the realistic case where intervalley scattering is weak but not ignorable, the PCC is gradually destabilized with increasing L, and g eventually decays to zero owing to the onset of Anderson localization. Here, we show that such destabilization of the PCC can be relaxed by pure dephasing. We numerically calculate g in the presence of long-range impurities, which induce weak intervalley scattering, taking the dephasing effect into account. It is demonstrated that, under sufficient dephasing, the decay of g in the regime of g \lesssim 1 is strongly suppressed and the quasi-quantization of g (i.e., g ~ 1) can be observed in a wide region of L.
description: 7 pages, 11 figures
The Varying Light Curve and Timings of the Ultra-short Period Contact Binary KIC 9532219
Creators: name: Lee, Jae Woo
name: Hong, Kyeongsoo
name: Koo, Jae-Rim
name: Park, Jang-Ho
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: KIC 9532219 is a W UMa-type eclipsing binary with an orbital period of 0.1981549 d that is below the short-period limit ($\sim$0.22 d) of the period distribution for contact binaries. The {\it Kepler} light curve of the system exhibits striking light changes in both eclipse depths and light maxima. Applying third-body and spot effects, the light-curve synthesis indicates that the eclipsing pair is currently in a marginal contact stage with a mass ratio of $q$=1.20, an orbital inclination of $i$=66.0 deg, a temperature difference of $Δ$ ($T_{1}$--$T_{2}$)=172 K, and a third light of $l_3$=75.9 \%. To understand the light variations with time, we divided up the light curve into 312 segments and separately analyzed them. The results reveal that variation of eclipse depth is primarily caused by changing amounts of contamination due to the nearby star KIC9532228 between the {\it Kepler} Quarters and that the variable O'Connell effect originates from the starspot activity on the less massive primary component. Based on our light-curve timings, a period study of KIC 9532219 indicates that the orbital period has varied as a combination of a downward parabola and a light-travel-time (LTT) effect due to a third body, with a period of 1196 d and a minimum mass of 0.0892 $M_\odot$ in an eccentric orbit of 0.150. The parabolic variation could be a small part of a second LTT orbit due to a fourth component in a wider orbit, instead of either mass transfer or angular momentum loss.
description: 21 pages, including 7 figures and 5 tables, accepted for publication in ApJ
High Speed Laser Drilling: Parameter Evaluation and Characterisation
Creators: name: Knorz, A.
name: Gutscher, S.
name: Fell, A.
name: Gundel, P.
name: Preu, R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 1410-1416
description: Laser drilling of via- holes is one of the key processes in the production of MWT- and EWT- solar
cells. Both cell concepts have their specific boundary conditions regarding hole diameter and number of holes per
cell area but in both cases the processing time and the laser induced damage should be as small as possible. In this
paper we investigate the influence of laser fluence and pulse width on the laser induced damage as well as the
processing speed. We compare ultra short laser pulses of only 12 ps with longer pulses in the range of 250 ns up to
1.6 μs. We observe a decreasing processing time with increasing pulse width. At the same time the process stability
increases due to a decreasing dependence of the drilling efficiency of the laser fluence. For the evaluation of laser
induced damage, lifetime samples are prepared and the recombination velocity SVia at the holes is determined. As an
alternative method for damage analysis μ- photo-luminescence measurements and μ- Raman spectroscopy
measurements were performed.
Behavior of Friedmann-Lemaitre-Robertson-Walker Singularities
Creators: name: Fernández-Jambrina, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences
subject: 83C75, 83F05

description: A regularization procedure has been recently suggested for regularizing Big Bang singularities in Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetimes. We argue that this procedure is only appliable to one case of Big Bang singularities and does not affect other types of singularities.
description: Accepted in International Journal of Theoretical Physics
Fermi energy dependence of first- and second-order Raman spectra in graphene: Kohn anomaly and quantum interference effect
Creators: name: Hasdeo, Eddwi H.
name: Nugraha, Ahmad R. T.
name: Dresselhaus, Mildred
name: Saito, Riichiro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Intensity of the first- and the second-order Raman spectra are calculated as a function of the Fermi energy. We show that the Kohn anomaly effect, i.e., phonon frequency renormalization, in the first-order Raman spectra originates from the phonon renormalization by the interband electron-hole excitation, whereas in the second-order Raman spectra, a competition between the interband and intraband electron-hole excitations takes place. By this calculation, we confirm the presence of different dispersive behaviors of the Raman peak frequency as a function of the Fermi energy for the first- and the second-order Raman spectra, as observed in experiments. Moreover, the calculated results of the Raman intensity sensitively depend on the Fermi energy for both the first- and the second-order Raman spectra. These results thus also show the importance of quantum interference effect phenomena.
description: 9 pages, 10 figures
Right-angled Artin groups on finite subgraphs of disk graphs
Creators: name: Kuno, Erika
Publisher: name: arXiv
Year: 2015
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Koberda proved that if a graph $Γ$ is a full subgraph of a curve graph $\mathcal{C}(S)$ of an orientable surface $S$, then the right-angled Artin group $A(Γ)$ on $Γ$ is a subgroup of the mapping class group ${\rm Mod}(S)$ of $S$. On the other hand, for a sufficiently complicated surface $S$, Kim-Koberda gave a graph $Γ$ which is not contained in $\mathcal{C}(S)$, but $A(Γ)$ is a subgroup of ${\rm Mod}(S)$. In this paper, we prove that if $Γ$ is a full subgraph of a disk graph $\mathcal{D}(H)$ of a handlebody $H$, then $A(Γ)$ is a subgroup of the handlebody group ${\rm Mod}(H)$ of $H$. Further, we show that there is a graph $Γ$ which is not contained in some disk graphs, but $A(Γ)$ is a subgroup of the corresponding handlebody groups.
description: 14 pages, 9 figures
Going viral: Researching Safely on Social Media
Creators: name: Ward, Paul
Publisher: name: Torrens University Australia
Year: 2023
Subjects: Screen and media culture

description: Safety issues for researchers conducting and disseminating research on social media have been inadequately addressed in institutional policies and practice globally, despite posing significant challenges to research staff and student well-being. In the context of the COVID-19 pandemic and given the myriad of advantages that web-based platforms offer researchers over traditional recruitment, data collection, and research dissemination methods, developing a comprehensive understanding of and guidance on the safe and effective conduct of research in web-based spaces has never been more pertinent. In this paper, we share our experience of using social media to recruit participants for a study on abortion stigma in Australia, which brought into focus the personal, professional, and institutional risks associated with conducting web-based research that goes viral. The lead researcher (KV), a postgraduate student, experienced a barrage of harassment on and beyond social media. The supportive yet uncoordinated institutional response highlighted gaps in practice, guidance, and policy relating to social media research ethics, researcher safety and well-being, planning for and managing web-based and offline risk, and coordinated organizational responses to adverse events. We call for and provide suggestions to inform the development of training, guidelines, and policies that address practical and ethical aspects of using social media for research, mental and physical health and safety risks and management, and the development of coordinated and evidence-based institutional- and individual-level responses to cyberbullying and harassment. Furthermore, we argue the case for the urgent development of this comprehensive guidance around researcher safety on the web, which would help to ensure that universities have the capacity to maximize the potential of social media for research while better supporting the well-being of their staff and students.
Food-system actors’ perspectives on trust: an international comparison
Creators: name: Ward, Paul
Publisher: name: Torrens University Australia
Year: 2023
Subjects: Public health nutrition

description: The purpose of this paper is to compare the perspectives of actors who contribute to trust in the food system in four high income countries which have diverse food incident histories: Australia, New Zealand (NZ), the United Kingdom (UK) and the Island of Ireland (IOI), focussing on their communication with the public, and their approach to food system interrelationships. Design/methodology/approach: Data were collected in two separate studies: the first in Australia, NZ and the UK (Study 1); and the second on the IOI (Study 2). In-depth interviews were conducted with media, food industry and food regulatory actors across the four regions (n=105, Study 1; n=50, Study 2). Analysis focussed on identifying similarities and differences in the perspectives of actors from the four regions regarding the key themes of communication with the public, and relationships between media, industry and regulators. Findings: While there were many similarities in the way food system actors from the four regions discussed (re)building trust in the context of a food incident, their perceptions differed in a number of critical ways regarding food system actor use of social media, and the attitudes and approaches towards relationships between food system actors. Originality/value: This paper outlines opportunities for the regions studied to learn from each other when looking for practical strategies to maximise consumer trust in the food system, particularly relating to the use of social media and attitudes towards role definition in industry–regulator relationships.
Food literacy programmes in secondary schools: A systematic literature review and narrative synthesis of quantitative and qualitative evidence
Creators: name: Ward, Paul
Publisher: name: Torrens University Australia
Year: 2023
Subjects: Health equity

description: The current review aimed to synthesise the literature on food literacy interventions among adolescents in secondary schools, the attitudes and perceptions of food literacy interventions in secondary schools, and their effects on dietary outcomes.Design:The systematic review searched five electronic databases from the earliest record to present.Setting:The studies selected for the review were from sixteen countries: Australia (n 10), Canada (n 1), China (n 1), France (n 1), Greece (n 2), Iran (n 1), South Africa (n 1), South India (n 1), Kenya (n 1), Norway (n 2), Portugal (n 1), Denmark (n 1), Northern Ireland (n 1), USA (n 17), UK (n 1) and Sweden (n 2).Participants:Adolescents aged 10-19 years.Results:Forty-four studies were eligible for inclusion. Adolescents with greater nutritional knowledge and food skills showed healthier dietary practices. Studies found a mixed association between food literacy and long-term healthy dietary behaviour. Two studies showed an improvement in adolescents' cooking skills and food safety knowledge; six studies showed an improvement in overall food safety knowledge; six studies showed an improvement in overall food and nutritional knowledge; and two studies showed an improvement in short-term healthy dietary behaviour.Conclusions:Food literacy interventions conducted in a secondary-school setting have demonstrated a positive impact on healthy food and nutritional knowledge. However, there appears to be limited evidence supporting food literacy interventions and long-term dietary behaviours in adolescents. More evidence-based research is required to adequately measure all domains of food literacy and more age-specific food literacy interventions.
Microfabrication of large area high-stress silicon nitride membranes for optomechanical devices
Creators: name: Serra, E.
name: Bawaj, M.
name: Borrielli, A.
name: Di Giuseppe, G.
name: Forte, S.
name: Kralj, N.
name: Malossi, N.
name: Marconi, L.
name: Marin, F.
name: Marino, F.
name: Morana, B.
name: Natali, R.
name: Pandraud, G.
name: Pontin, A.
name: Prodi, G. A.
name: Rossi, M.
name: Sarro, P. M.
name: Vitali, D.
name: Bonaldi, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In view of the integration of membrane resonators with more complex MEMS structures, we developed a general fabrication procedure for circular shape SiN$_x$ membranes using Deep Reactive Ion Etching (DRIE). Large area and high-stress SiN$_x$ membranes were fabricated and used as optomechanical resonators in a Michelson interferometer and in a Fabry-Pérot cavity. The measurements show that the fabrication process preserves both the optical quality and the mechanical quality factor of the membrane.
A simplification of the unified gas kinetic scheme
Creators: name: Chen, Songze
name: Guo, Zhaoli
name: Xu, Kun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Unified gas kinetic scheme (UGKS) is an asymptotic preserving scheme for the kinetic equations. It is superior for transition flow simulations, and has been validated in the past years. However, compared to the well known discrete ordinate method (DOM) which is a classical numerical method solving the kinetic equations, the UGKS needs more computational resources. In this study, we propose a simplification of the unified gas kinetic scheme. It allows almost identical numerical cost as the DOM, but predicts numerical results as accurate as the UGKS. Based on the observation that the equilibrium part of the UGKS fluxes can be evaluated analytically, the equilibrium part in the UGKS flux is not necessary to be discretized in velocity space. In the simplified scheme, the numerical flux for the velocity distribution function and the numerical flux for the macroscopic conservative quantities are evaluated separately. The simplification is equivalent to a flux hybridization of the gas kinetic scheme for the Navier-Stokes (NS) equations and conventional discrete ordinate method. Several simplification strategies are tested, through which we can identify the key ingredient of the Navier-Stokes asymptotic preserving property. Numerical tests show that, as long as the collision effect is built into the macroscopic numerical flux, the numerical scheme is Navier-Stokes asymptotic preserving, regardless the accuracy of the microscopic numerical flux for the velocity distribution function.
Supplementary document for Time scale dependent sign of amorphous titanium dioxide thermo-optic coefficient - 6542802.pdf
Creators: name: Weeber, Jean-Claude
name: Andrieux, Aurore
name: MENNEMANTEUIL, MARIE-MAXIME
name: Arocas, Juan
name: Markey, Laurent
name: Hammani, Kamal
name: Bouhelier, Alexandre
name: Bellas, Dimitris V
name: Lidorikis, Elefterios
name: Pleros, Nikos
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental informations
Comparing Models for Energy Rating Prediction for Diverse Photovoltaic Technologies
Creators: name: Girbau García, Z.
name: Huld, T.
name: Nikolaeva-Dimitrova, M.
name: Kenny, R.P.
name: Dunlop, E.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Components for PV Systems
PV Modules

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 2929-2931
description: This paper compares three methods to predict the performance of several photovoltaic (PV) module technologies. The first two execute a least-squares fitting, but they are based on different approaches, while the third one is based on a biharmonic spline interpolation. The methods fit to a set of experimental data (either indoor or outdoor) and then estimate the maximum power (Pm) output at any given conditions of in-plane irradiance (G) and module temperature (Tm). The reduction of the set of data, while still obtaining reasonable results, has also been examined. In general terms, we conclude that the first method, an analytical approach, provides the best accuracy in terms of power prediction. Moreover, it is the least computationally demanding of the three.
Role of nucleonic Fermi surface depletion in neutron star cooling
Creators: name: Dong, J. M.
name: Lombardo, U.
name: Zhang, H. F.
name: Zuo, W.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Fermi surface depletion of beta-stable nuclear matter is calculated to study its effects on several physical properties which determine the neutron star thermal evolution. The neutron and proton Z factors measuring the corresponding Fermi surface depletions, are calculated within the Brueckner-Hartree-Fock approach employing the AV18 two-body force supplemented by a microscopic three body force. Neutrino emissivity, heat capacity and, in particular, neutron 3PF2 superfluidity turn out to be reduced, especially at high baryonic density, to such an extent that the cooling rates of young neutron stars are significantly slowed
description: 9 pages, 6 figures, accepted for publication in ApJ
Internal wave pressure, velocity, and energy flux from density perturbations
Creators: name: Allshouse, Michael R.
name: Lee, Frank M.
name: Morrison, Philip J.
name: Swinney, Harry L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Determination of energy transport is crucial for understanding the energy budget and fluid circulation in density varying fluids such as the ocean and the atmosphere. However, it is rarely possible to determine the energy flux field $\mathbf{J} = p \mathbf{u}$, which requires simultaneous measurements of the pressure and velocity perturbation fields, $p$ and $\mathbf{u}$. We present a method for obtaining the instantaneous $\mathbf{J}(x,z,t)$ from density perturbations alone: a Green's function-based calculation yields $p$, and $\mathbf{u}$ is obtained by integrating the continuity equation and the incompressibility condition. We validate our method with results from Navier-Stokes simulations: the Green's function method is applied to the density perturbation field from the simulations, and the result for $\mathbf{J}$ is found to agree typically to within $1\%$ with $\mathbf{J}$ computed directly using $p$ and $ \mathbf{u}$ from the Navier-Stokes simulation. We also apply the Green's function method to density perturbation data from laboratory schlieren measurements of internal waves in a stratified fluid, and the result for $\mathbf{J}$ agrees to within $6\%$ with results from Navier-Stokes simulations. Our method for determining the instantaneous velocity, pressure, and energy flux fields applies to any system described by a linear approximation of the density perturbation field, e.g., to small amplitude lee waves and propagating vertical modes. The method can be applied using our Matlab graphical user interface EnergyFlux.
Μελέτες για την ασύμμετρη σύνθεση ακεταλών
Creators: name: Μπουλογεώργου, Μαρία Α.
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Στερεοεκλεκτικότητα
Ο-γλυκοζίτες
Σπειροακετάλες
Οξειδωτικά
Stereoselectivity
O-glycosides
Spiroacetals
Oxidative

description: Στο 1ο Κεφάλαιο μελετάται η ανάπτυξη νέων μεθόδων εναντιοεκλεκτικής σύνθεσης σπειρανικών ακεταλών. Η δομική μονάδα της σπειροακετάλης επιλέχθηκε καθώς είναι ευρέως διαδεδομένη σε φυσικά και φαρμακευτικά προϊόντα με απλή ή πιο σύνθετη δομή. Ο σπειρανικός σκελετός είναι στις περισσότερες περιπτώσεις απαραίτητος για τη βιοδραστικότητα αυτών των μορίων και έχει αποδειχθεί ότι οι απλοποιημένες σπειροακετάλες που προέρχονται από φυσικά προϊόντα διατηρούν βιολογική δραστηριότητα παρόμοια με το μητρικό φυσικό προϊόν. Η μεθοδολογία που εφαρμόζεται ονομάζεται «δυναμική κινητική απορακεμοποίηση». Η κεντρική ιδέα βασίζεται στην κατεργασία του ρακεμικού μίγματος μιας σπειροακετάλης με έναν ασύμμετρο καταλύτη, όπου και από τα δύο εναντιομερή σχηματίζεται ένα μη χειρόμορφο ενδιάμεσο, που με την επίδραση του ασύμμετρου καταλύτη μετατρέπεται και πάλι στο ένα εναντιομερές της αρχικής ακετάλης, εκλεκτικά λόγω κινητικού ελέγχου. Στο 2ο Κεφάλαιο μελετάται η χρήση τετραπροστατευμένων ιωδιδίων D-σακχάρων (μη ενεργοποιημένοι γλυκόζυκο δότες) για την στερεοεκλεκτική σύνθεση Ο-γλυκοζιτών, μέσω οξειδωτικής ενεργοποίησής τους με τη χρήση αντιδραστηρίων του τρισθενούς ιωδίου. Οι Ο-γλυκοζίτες αποτελούν μια σημαντική και μεγάλη κατηγορία γλυκοζιτών, ευρέως διαδεδομένων στη φύση, με ευρύ φάσμα βιολογικής δραστικότητας, όπως αντικαρκινική, αντιβιοτική και αντιική.
description: In chapter 1 we describe the development of a new strategy for the enantioselective synthesis of spiroacetals. Spiroacetals are among the most ubiquitous structural motifs found in nature, and they are a fundamental constituent of a number of natural products exhibiting biological activity. The spiroacetal scaffold is in most cases essential for the bioactivity of these products and in fact, it has been shown that simplified spiroacetals derived from natural products retain the biological activity similar to the parent natural product. The methodology applied is called “dynamic kinetic deracemization”. The central idea is based on the processing of the racemic mixture with a chiral Bronsted acid, followed by the formation of an oxocarbenium ion intermediate, which leads to catalytic asymmetric spiroacetalization reaction due to kinetic resolution. Chapter 2 is about stereoselective oxidative O-glycosylation of disarmed glycosyl iodides with alcohols using phenyliodine (III) diacetate (PIDA) as the promoter. O-glycosides represent an important class of glycosides that are extensively found in nature and exhibit a broad range of biological activities, including anticancer, antibiotic and antiviral properties.
Taxonomy of Digital Research Activites in the Humanities (TaDiRAH)
Creators: name: Borek, Luise
name: Hastik, Canan
Publisher: name: Zenodo
Year: 2023
Subjects: Kuration
Kollaboration
Vernetzung
Wissenstransfer
Mehrsprachigkeit
Harmonisierung

description: Geisteswissenschaftliche Forschung beruht auf einer Reihe von Aktivitäten, die disziplinübergreifend Anwendung finden und jeweils den gesamten Forschungsprozess abbilden. Basierend auf diesen Primitives oder Methodological Commons wurde mit der Taxonomy of Digital Research Activities in the Humanities (TaDiRAH) ein Vokabular entwickelt, das die spezifischen Methoden der Digital Humanities (DH) in diese generischen Strukturen einbettet und es ermöglicht, DH-Forschung und relevante Materialien strukturiert zu beschreiben und im Einklang mit den FAIR-Kriterien nachhaltig zu klassifizieren. Die Anreicherung von Ressourcen, z.B. Projekten, Publikationen oder Werkzeugen, macht diese besser auffindbar, ermöglicht ihre Kontextualisierung und Vernetzung - und führt insgesamt zu sichtbaren Aktivitäten der Digitalen Geisteswissenschaften. Die sieben Top-Level Aktivitäten der Taxonomie (Analysieren, Erfassen, Erzeugen, Dissemination, Anreichern, Interpretation und Speicherung) sowie die jeweils darunter gefassten Methoden verfügen über Scope Notes, sodass TaDiRAH nicht nur eine eindeutige Terminologie, sondern auch kontextbezogene Definitionen liefert. In den Prozess der Entwicklung war die Community von Anfang an intensiv eingebunden, um sowohl spezifische Bedarfe bedienen zu können als auch eine praxisorientierte Nutzung zu gewährleisten. Das Engagement der internationalen DH-Community zeigt sich auch an der Mehrsprachigkeit der Taxonomie, die inzwischen neben dem Englischen Übersetzungen ins Deutsche, Französische, Spanische, Portugiesische, Serbische, Italienische und Japanische erfahren hat. Die Multilingualität erlaubt es, Ressourcen marginalisierter Sprachen besser in den internationalen Fachdiskurs einzubinden. TaDiRAH leistet somit einen Beitrag, die Kollaboration, die Vernetzung, den Wissenstransfer und die Harmonisierung von Forschungsaktivitäten in den DH nachhaltig zu fördern. Inhaltlich kann TaDiRAH die Kuration und die Qualitätsbewertung von Metadaten in Infrastrukturen mittels semi-automatischer semantischer Annotation unterstützen um eine gemeinsame föderierte Infrastruktur aufzubauen, anzureichern und zu pflegen. Gegenwärtig wird die Anwendbarkeit dieser Taxonomie in verschiedenen Projekten und Initiativen (z.B.DALIA Knowlegde-Base, GoTriple platform (https://www.gotriple.eu/) und Scholarly Makerspace) entwickelt und erprobt. TaDiRAH ist in dem von DARIAH-EU betriebenen Vocabs-Service unter einer CC0-Lizenz in SKOS verfügbar
Precision spectroscopy of molecular hydrogen ions: an introduction
Creators: name: Schiller, S.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Physical Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Computational Biology

description: The molecular hydrogen ions (MHI) are composed of only two nuclei and a single electron. These simplest molecules are fascinating systems at the interface of atomic and molecular physics. Compared to atoms, they present the additional degrees of freedom of vibration and rotation. The spectrum of rovibrational energies provides an exceptionally large number of transitions that are potentially measurable with extremely small fractional uncertainty. After two decades of theoretical and experimental efforts, precision studies of the vibrational transition frequencies have now reached fractional uncertainties in the low-10−12 range. This is nearing the level of the most accurate experiment-theory comparisons in physics, performed on the hydrogen atom and on the g-factor of the electron. We describe the motivation for the study of MHI, present some relevant theoretical and experimental issues, indicate a few salient results and give an outlook towards future opportunities.
Extensive Investigation and Characterisation of Solar Cells with Screen-Printed Emitters Using Phosphorus Dopant Pastes
Creators: name: Pletzer, T.M.
name: Stegemann, E.F.
name: Windgassen, H.
name: Bätzner, D.L.
name: Kurz, H.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2080-2083
description: Phosphorus dopant pastes are an attractive alternative to the conventional POCl3 dopant source for
emitter processing in solar cells as they allow realisation of selective emitters on an industrial scale. In this paper, it
is shown that single-sided screen-printed emitters processed with phosphorus dopant pastes are attractive for
industrial multicrystalline silicon solar cell fabrication and have the potential for the realisation of selective emitters.
This was carried out by means of multicrystalline silicon solar cells characterisation with four-point-probe,
current-voltage, spectral response and Suns-VOC measurements. It is found that the investigated solar cells with
double-sided POCl3 emitters exhibit a slightly higher efficiency. Solar cells with single-sided screen-printed emitters
are limited by additional recombination in the emitter and in the interface between the emitter and passivation layer.
It is expected that a careful surface preparation allows to limit the recombination and therefore to boost cell
performance. Hence, solar cells with single-sided screen-printed emitters are well suited for solar cell processing and
the application of selective emitter concepts.
PV vs CPV and CSP: A Comparative Analysis of Technologies and Cost Roadmaps
Creators: name: Malik, I.
name: Skumanich, A.
name: Ryabova, E.
Publisher: name: WIP-Munich
Year: 2010
Subjects: PV Systems
Off-grid Applications

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4911-4915
description: There is signficantly increasing interest in solar installations for micro-grid and small utility applications.
In particular, numerous developing countries are looking to establish power sources for the local regions based on
renewables and are exploring the options for energy including: PV, CPV, CSP, wind, and hybrid plants. This paper
provides material developed from various engagements and from market analysis regarding the considerations for PV vs
CPV vs CSP. The overall context is examined and then the specific application of a smaller utility is considered. The
primary conclusions are that PV has a lead for solar solutions in several regards including: PV is the lowest installation
cost, the lowest O&M, and can be installed in modular units of any kW size. The case for CPV is more challenging, and
CSP even more. However, CPV and CSP have the higher capacity factors. The main potential for CSP is that energy
storage is possible. This paper outlines the various considerations developed in detail in a more extensive Market Report
and provides an overview of the comparisons including wind. It examines micro-grid considerations, but also grounds
the analysis in market research and technology research for the general grid-connected configuration. Finally, a market
sizing and assessment for growth is made for the “hidden” micro-grid/off-grid segment, as seen in developing countries.
What Is Important for BIPV?
Creators: name: Herfurth, D.
name: Yildiz, O.
Publisher: name: WIP-Munich
Year: 2010
Subjects: PV Systems
PV Components for Buildings, PV Integration in Buildings

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 5117-5119
description: In the course of the ongoing globalisation of the market for renewable energy, ever-newer fields of
application for photovoltaic (PV) and solar thermal plants are being developed. Architects and planners are thus making
increasingly frequent use of modules and collectors in visually attractive variants, such as for building integration and
façade systems. With these systems, the focus is put on aesthetics and the often somewhat greater yield as compared to
standard systems. However, the effort required in order to ensure these systems are designed in a secure manner that
complies with applicable standards is much greater than for regular roof top and outdoor systems. For example, specific
standards must be observed, and corrosion protection and seal tightness become fundamentally important. This lecture
provides an overview of the possibilities for integrating PV and thermal systems into buildings (roof and façade). It is
intended to illustrate the challenges faced during the planning and installation of such systems. This includes observing
and applying the corresponding standards, regulations and codes. The goal is to clarify what must be taken into account
by the planner of the structure from a structural stability standpoint and where the challenges in a design lie.
The World’s First CPV Stand-Alone System – Water Supply in Remote Areas of Egypt
Creators: name: Vetter, M.
name: Schies, A.
name: Wachtel, J.
name: Koirala, B.P.
name: Heile, I.
name: Gombert, A.
name: Abulfotuh, F.
Publisher: name: WIP-Munich
Year: 2010
Subjects: PV Systems
Off-grid Applications

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4903-4910
description: Within the EU funded project NACIR a Concentrating Photovoltaic (CPV) stand-alone system is
developed to provide electric power for water pumping, desalination and irrigation application. The system design
requires only small sized battery storages to secure power supply for the measurement and control equipment as well
as for the motors of the trackers to orientate them in the morning or after a cloudy period during the day. The first
part of this paper provides a description of the model based system layout and the model based development of the
energy management system including the used “Universal Energy Supply Protocol” for optimizing control of the
system and its components. In the second part the demonstration system is described, which was installed in August
2010 on the test site of the water research centre Wadi El Natrun in Egypt. This system consists of five CPV trackers
with 30 kWp, delivering energy for pumping, irrigation and desalination.
Fat as productive: Enactments of Fat in an Australian Suburb
Creators: name: Ward, Paul
Publisher: name: Torrens University Australia
Year: 2023
Subjects: Social determinants of health

description: By foregrounding positive and productive capacities of fat, we explore experiences of expanding, maintaining, or diminishing body sizes to accommodate the different meanings and enactments of fat. Drawing on fieldwork conducted in a South Australian community that has experienced significant socioeconomic disadvantage, we detail how the “problem” of fat in public health discourse is countered in the lived experience of people targeted for obesity intervention. In so doing, we attend to the multiple meanings and practices of fat that differ to the focus within public health interventions on the negative health consequences of overweight and obesity.
The Investigation of Multicrystalline Si Solar Cells by the Electroluminescence Imaging Technique with Different Wavelength Bandpass Filters
Creators: name: Sugimura, E.
name: Kitiyanan, A.
name: Ogane, A.
name: Tani, A.
name: Hirata, K.
name: Saitoh, T.
name: Hatayama, T.
name: Yano, H.
name: Fuyuki, T.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2074-2076
description: In this study, optical band-pass filters have been introduced in order to obtain the Electroluminescence
(EL) images at the specific wavelength. Preliminary results of EL images of multicrystalline Si cell captured by the
Si-CCD camera attached with different wavelength band-pass filters comparing. The EL image taken by using 900
nm- band-pass filter (FWHM: 10 μm) should represent the EL emission activities at the area close to the surface of
the sample since the absorption coefficient () of Si at 900 nm is around 30 cm-1 which is corresponding to the
absorption depth around 33 μm while the EL image taken by using 1100 nm-band-pass filter should clearly show the
emission activities through out the samples. Moreover, a spatial EL evaluation method was confirmed by observing
the appearance of a surface passivation processing
Explicit symplectic algorithms based on generating functions for charged particle dynamics
Creators: name: Zhang, Ruili
name: Qin, Hong
name: Tang, Yifa
name: Liu, Jian
name: He, Yang
name: Xiao, Jianyuan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences
subject: 34A26, 37M15, 65P10, 65Z05, 70H05

description: Dynamics of a charged particle in the canonical coordinates is a Hamiltonian system, and the well-known symplectic algorithm has been regarded as the de facto method for numerical integration of Hamiltonian systems due to its long-term accuracy and fidelity. For long-term simulations with high efficiency, explicit symplectic algorithms are desirable. However, it is widely accepted that explicit symplectic algorithms are only available for sum-separable Hamiltonians, and that this restriction severely limits the application of explicit symplectic algorithms to charged particle dynamics. To overcome this difficulty, we combine the familiar sum-split method and a generating function method to construct second and third order explicit symplectic algorithms for dynamics of charged particle. The generating function method is designed to generate explicit symplectic algorithms for product-separable Hamiltonian with form of $H(\mathbf{p},\mathbf{q})=\mathbf{p}_{i}f(\mathbf{q})$ or $H(\mathbf{p},\mathbf{q})=\mathbf{q}_{i}f(\mathbf{p})$. Applied to the simulations of charged particle dynamics, the explicit symplectic algorithms based on generating functions demonstrate superiorities in conservation and efficiency.
description: 17 pages, 3 figures