cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Catalog of Low-Mass Star-Forming Cores Observed with SHARC-II at 350 microns
Creators: name: Suresh, Akshaya
name: Dunham, Michael M.
name: Arce, Héctor G.
name: Evans, Neal J.
name: Bourke, Tyler L.
name: Merello, Manuel
name: Wu, Jingwen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a catalog of low-mass dense cores observed with the SHARC-II instrument at 350 microns. Our observations have an effective angular resolution of 10", approximately 2.5 times higher than observations at the same wavelength obtained with the Herschel Space Observatory, albeit with lower sensitivity, especially to extended emission. The catalog includes 81 maps covering a total of 164 detected sources. For each detected source, we tabulate basic source properties including position, peak intensity, flux density in fixed apertures, and radius. We examine the uncertainties in the pointing model applied to all SHARC-II data and conservatively find that the model corrections are good to within ~3", approximately 1/3 of the SHARC-II beam. We examine the differences between two array scan modes and find that the instrument calibration, beam size, and beam shape are similar between the two modes. We also show that the same flux densities are measured when sources are observed in the two different modes, indicating that there are no systematic effects introduced into our catalog by utilizing two different scan patterns during the course of taking observations. We find a detection rate of 95% for protostellar cores but only 45% for starless cores, and demonstrate the existence of a SHARC-II detection bias against all but the most massive and compact starless cores. Finally, we discuss the improvements in protostellar classification enabled by these 350 micron observations.
description: Accepted by AJ
Superlens induced loss-insensitive optical force
Creators: name: Cui, Xiaohan
name: Wang, Shubo
name: Chan, C. T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A slab with relative permittivity $ε= - 1 + iδ$ and permeability $μ= - 1 + iδ$ has a critical distance away from the slab where a small particle will either be cloaked or imaged depending on whether it is located inside or outside that critical distance. We find that the optical force acting on a small cylinder under plane wave illumination reaches a maximum value at this critical distance. Contrary to the usual observation that superlens systems should be highly loss-sensitive, this maximum optical force remains a constant when loss is changed within a certain range. For a fixed particle-slab distance, increasing loss can even amplify the optical force acting on the small cylinder, contrary to the usual belief that loss compromises the response of supenlens.
description: 6 pages, 4 figures
The Initial Conditions of Stellar Protocluster Formation: III. The Herschel counterparts of the Spitzer Dark Cloud catalogue
Creators: name: Peretto, N.
name: Lenfestey, C.
name: Fuller, G. A.
name: Traficante, A.
name: Molinari, S.
name: Thompson, M. A.
name: Ward-Thompson, D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Galactic plane surveys of pristine molecular clouds are key for establishing a Galactic-scale view of the earliest stages of star formation. For this reason Peretto & Fuller (2009) built an unbiased sample of IRDCs in the 10 deg < |l| < 65 deg, |b|<1 deg region of the Galactic plane using Spitzer 8micron extinction. However, in absorption studies, intrinsic fluctuations in the mid-infrared background can be mis-interpreted as foreground clouds. The main goal of the study presented here is to disentangle real clouds in the Spitzer Dark Cloud (SDC) catalogue from artefacts due to fluctuations in the mid-infrared background. We constructed H_2 column density maps at ~18" resolution using the 160micron and 250micron data from the Herschel Galactic plane survey Hi-GAL. We also developed an automated detection scheme that confirms the existence of a SDC through its association with a peak on these Herschel column density maps. Detection simulations, along with visual inspection of a small sub-sample of SDCs, have been performed to get better insight into the limitations of our automated identification scheme. Our analysis shows that 76(+/-19)% of the catalogued SDCs are real. This fraction drops to 55(+/-12)% for clouds with angular diameters larger than ~1 arcminute. The contamination of the PF09 catalogue by large spurious sources reflect the large uncertainties associated to the construction of the 8micron background emission, a key stage towards the identification of SDCs. A comparison of the Herschel confirmed SDC sample with the BGPS and ATLASGAL samples shows that SDCs probe a unique range of cloud properties, reaching down to more compact and lower column density clouds than any of these two (sub-)millimetre Galactic plane surveys.
description: 11 pages, 14 figures, accepted for publication in A&A
Seamless lightning nowcasting with recurrent-convolutional deep learning
Creators: name: Leinonen, Jussi
name: Hamann, Ulrich
name: Germann, Urs
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: I.2.10; J.2

description: A deep learning model is presented to nowcast the occurrence of lightning at a five-minute time resolution 60 minutes into the future. The model is based on a recurrent-convolutional architecture that allows it to recognize and predict the spatiotemporal development of convection, including the motion, growth and decay of thunderstorm cells. The predictions are performed on a stationary grid, without the use of storm object detection and tracking. The input data, collected from an area in and surrounding Switzerland, comprise ground-based radar data, visible/infrared satellite data and derived cloud products, lightning detection, numerical weather prediction and digital elevation model data. We analyze different alternative loss functions, class weighting strategies and model features, providing guidelines for future studies to select loss functions optimally and to properly calibrate the probabilistic predictions of their model. Based on these analyses, we use focal loss in this study, but conclude that it only provides a small benefit over cross entropy, which is a viable option if recalibration of the model is not practical. The model achieves a pixel-wise critical success index (CSI) of 0.45 to predict lightning occurrence within 8 km over the 60-min nowcast period, ranging from a CSI of 0.75 at a 5-min lead time to a CSI of 0.32 at a 60-min lead time.
description: 21 pages, 9 figures. Accepted to Artificial Intelligence for the Earth Sciences. Changes after the previous version are in response to the comments received from one remaining anonymous reviewer
Radiation Pressure Force from Optical Cycling on a Polyatomic Molecule
Creators: name: Kozyryev, Ivan
name: Baum, Louis
name: Matsuda, Kyle
name: Hemmerling, Boerge
name: Doyle, John M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We demonstrate multiple photon cycling and radiative force deflection on the triatomic free radical strontium monohydroxide (SrOH). Optical cycling is achieved on SrOH in a cryogenic buffer-gas beam by employing the rotationally closed $P\left(N''=1\right)$ branch of the vibronic transition $\tilde{X}^{2}Σ^{+}\left(000\right)\leftrightarrow\tilde{A}^{2}Π_{1/2}\left(000\right)$. A single repumping laser excites the Sr-O stretching vibrational mode, and photon cycling of the molecule deflects the SrOH beam by an angle of $0.2^{\circ}$ via scattering of $\sim100$ photons per molecule. This approach can be used for direct laser cooling of SrOH and more complex, isoelectronic species.
Learning Resilient Radio Resource Management Policies with Graph Neural Networks
Creators: name: NaderiAlizadeh, Navid
name: Eisen, Mark
name: Ribeiro, Alejandro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: We consider the problems of user selection and power control in wireless interference networks, comprising multiple access points (APs) communicating with a group of user equipment devices (UEs) over a shared wireless medium. To achieve a high aggregate rate, while ensuring fairness across all users, we formulate a resilient radio resource management (RRM) policy optimization problem with per-user minimum-capacity constraints that adapt to the underlying network conditions via learnable slack variables. We reformulate the problem in the Lagrangian dual domain, and show that we can parameterize the RRM policies using a finite set of parameters, which can be trained alongside the slack and dual variables via an unsupervised primal-dual approach thanks to a provably small duality gap. We use a scalable and permutation-equivariant graph neural network (GNN) architecture to parameterize the RRM policies based on a graph topology derived from the instantaneous channel conditions. Through experimental results, we verify that the minimum-capacity constraints adapt to the underlying network configurations and channel conditions. We further demonstrate that, thanks to such adaptation, our proposed method achieves a superior tradeoff between the average rate and the 5th percentile rate -- a metric that quantifies the level of fairness in the resource allocation decisions -- as compared to baseline algorithms.
description: Accepted by IEEE Transactions on Signal Processing. Code available at https://github.com/navid-naderi/Resilient_RRM_GNN
Nyctimene masalai Smith and Hood 1983
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Nyctimene
Nyctimene masalai

description: Nyctimene masalai Smith and Hood, 1983. Occas. Pap. Mus. Texas Tech Univ., p. 1. TYPE LOCALITY: Bismarcks, New Ireland, Ralum. DISTRIBUTION: New Ireland (Bismarck Arch.).
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 144, DOI: 10.5281/zenodo.7353060
Nyctimene minutus K. Andersen 1910
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Nyctimene
Nyctimene minutus

description: Nyctimene minutus K. Andersen, 1910. Ann. Mag. Nat. Hist., ser. 7, 6:622. TYPE LOCALITY: Indonesia, Sulawesi, Minahassa, Tondano. DISTRIBUTION: Sulawesi, C Moluccas. SYNONYMS: varius.
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 144, DOI: 10.5281/zenodo.7353060
Nyctimene rabori Heaney and Peterson 1984
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Nyctimene
Nyctimene rabori

description: Nyctimene rabori Heaney and Peterson, 1984. Occas. Pap. Mus. Zool. Univ. Michigan, 7083. TYPE LOCALITY: Philippines, Negros, Sibulan, Lake Balinsasayo. DISTRIBUTION: Known only from Negros Isl. STATUS: IUCN - Endangered.
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 144, DOI: 10.5281/zenodo.7353060
Introducing DMRadio-GUT, a search for GUT-scale QCD axions
Creators: name: Brouwer, L.
name: Chaudhuri, S.
name: Cho, H. -M.
name: Corbin, J.
name: Dawson, C. S.
name: Droster, A.
name: Foster, J. W.
name: Fry, J. T.
name: Graham, P. W.
name: Henning, R.
name: Irwin, K. D.
name: Kadribasic, F.
name: Kahn, Y.
name: Keller, A.
name: Kolevatov, R.
name: Kuenstner, S.
name: Leder, A. F.
name: Li, D.
name: Ouellet, J. L.
name: Pappas, K. M. W.
name: Phipps, A.
name: Rapidis, N. M.
name: Safdi, B. R.
name: Salemi, C. P.
name: Simanovskaia, M.
name: Singh, J.
name: van Assendelft, E. C.
name: van Bibber, K.
name: Wells, K.
name: Winslow, L.
name: Wisniewski, W. J.
name: Young, B. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The QCD axion is a leading dark matter candidate that emerges as part of the solution to the strong CP problem in the Standard Model. The coupling of the axion to photons is the most common experimental probe, but much parameter space remains unexplored. The coupling of the QCD axion to the Standard Model scales linearly with the axion mass; therefore, the highly-motivated region 0.4-120 neV, corresponding to a GUT-scale axion, is particularly difficult to reach. This paper presents the design requirements for a definitive search for GUT-scale axions and reviews the technological advances needed to enable this program.
description: 16 pages, 4 figures
Topological Non-Fermi Liquid
Creators: name: Cai, Rong-Gen
name: Qi, Yong-Hui
name: Wu, Yue-Liang
name: Zhang, Yun-Long
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we investigate the $(2+1)$-dimensional topological non-Fermi liquid in strongly correlated electron system, which has a holographic dual description by Einstein gravity in $(3+1)$-dimensional anti-de Sitter (AdS) space-time. In a dyonic Reissner-Nordstrom black hole background, we consider a Dirac fermion coupled to the background $U(1)$ gauge theory and an intrinsic chiral gauge field $b_M$ induced by chiral anomaly. UV retarded Green's function of the charged fermion in the UV boundary from AdS$_4$ gravity is calculated, by imposing in-falling wave condition at the horizon. We also obtain IR correlation function of the charged fermion at the IR boundary arising from the near horizon geometry of the topological black hole with index $k=0,\pm 1$. By using the UV retarded Green's function and IR correlation function, we analyze the low frequency behavior of the topological non-Fermi liquid at zero and finite temperatures, especially the relevant non-Fermi liquid behavior near the quantum critical region. In addition, we find that when $k=\pm 1$, the effective mass of bulk Dirac fermion at IR fixed point is topologically quantized, consequently the Fermi momentum presents a discrete sparse distributed pattern, in contrary to the Ricci flat case with $k=0$. As demonstrated examples, we calculate the spectral functions of topological non-Fermi liquid due to anomalous Hall effect (AHE) ($|\vec{b}|\ne 0, b_0=0$) and chiral magnetic effect (CME) ($|\vec{b}| = 0, b_0\ne 0$), which can be tested in topological materials such as topological insulator and topological metal with strong couplings.
description: 69 pages, 10 figures
Photovoltaic Energy Competitiveness and Risk Assessment for the South African Residential Sector
Creators: name: Betz, S.
name: Caneva, S.
name: Weiss, I.
name: Rowley, P.
Publisher: name: WIP
Year: 2015
Subjects: PV - A MAJOR ELECTRICITY SOURCE
PV Business Opportunities

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 3143-3148
description: The establishment of new photovoltaic (PV) energy markets could be seen as business development opportunities for
corporations to expand outside traditional economies. The main advantage for emerging markets is to set up PV energy
in a less policy driven context by taking advantage from the lessons learned from mature markets. An appropriate
assessment of PV market competitiveness is then necessary in order to drive policy and business related decisions. The
analysis presented in this paper consists of a PV energy competitiveness assessment using a case study of the residential
market of South Africa. Competitiveness is defined by the risks associated to the financial performance of a domestic
rooftop grid-connected PV system considering the current market status and three proposed business models: netmetering,
net purchase and sales, and energy savings performance contract. Financial performance involved a socket
parity evaluation combined with a discounted net cash flow analysis. Risk assessment used Monte Carlo (MC)
simulation. Higher potential for profitability was obtained from the energy savings performance contract model, which
represents transfer of PV system ownership from the household to an energy services company. It was possible to
conclude that risk assessment drives decisions from investors and policy makers into improved business solutions which
are capable to increase residential PV market competitiveness and overcome subsidies models.
Rotating quantum wave turbulence
Creators: name: Mäkinen, J. T.
name: Autti, S.
name: Heikkinen, P. J.
name: Hosio, J. J.
name: Hänninen, R.
name: L'vov, V. S.
name: Walmsley, P. M.
name: Zavjalov, V. V.
name: Eltsov, V. B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Rotating turbulence is ubiquitous in nature. Previous works suggest that such turbulence could be described as an ensemble of interacting inertial waves across a wide range of length scales. For turbulence in macroscopic quantum condensates, the nature of the transition between the quasiclassical dynamics at large scales and the corresponding dynamics at small scales, where the quantization of vorticity is essential, remains an outstanding unresolved question. Here we expand the paradigm of wave-driven turbulence to rotating quantum fluids where the spectrum of waves extends to microscopic scales as Kelvin waves on quantized vortices. We excite inertial waves at the largest scale by periodic modulation of the angular velocity and observe dissipation-independent transfer of energy to smaller scales and the eventual onset of the elusive Kelvin-wave cascade at the lowest temperatures. We further find that energy is pumped to the system through a boundary layer distinct from the classical Ekman layer and support our observations with numerical simulations. Our experiments demonstrate a new regime of turbulent motion in quantum fluids where the role of vortex reconnections can be neglected, thus stripping the transition between the classical and the quantum regimes of turbulence down to its bare bones.
description: 21 pages, 11 figures
Nyctimene robinsoni Thomas 1904
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Nyctimene
Nyctimene robinsoni

description: Nyctimene robinsoni Thomas, 1904. Ann. Mag. Nat. Hist., ser. 7, 14:196. TYPE LOCALITY: Australia, Queensland, Cooktown. DISTRIBUTION: E Queensland (Australia). SYNONYMS: tryoni.
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 144, DOI: 10.5281/zenodo.7353060
The Role of Innovation in the Future PV and Storage Markets
Creators: name: Almeida Silva, J.A.
name: Valentim Oliveira, S.
name: Pereira Távora, G.
name: Mendonça, S.
Publisher: name: WIP
Year: 2015
Subjects: PV - A MAJOR ELECTRICITY SOURCE
PV Business Opportunities

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 3183-3186
description: The trends of research and innovation in photovoltaic (PV) and battery technologies are the focus of this
work. The possible interactions between these two fields are also explored. Patents are employed as an innovation
indicator. The approach helps to identify the most dynamic technology branches and to point-out the players that have
contributed the most to the innovation in these areas. In spite of some heterogeneity, both PV and battery fields show
a growth patterns in terms of filled patents. The number of patents filled on both PV + batteries is still small, indicating
that the innovation bonds between the two fields are still weak and that the cross-enabling dynamics between
complementary technologies remains a bottleneck for the renewables agenda as a whole.
Polynomial dynamical systems and Korteweg--de Vries equation
Creators: name: Buchstaber, Victor M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this work we explicitly construct polynomial vector fields $\mathcal{L}_k,\;k=0,1,2,3,4,6$ on the complex linear space $\mathbb{C}^6$ with coordinates $X=(x_2,x_3,x_4)$ and $Z=(z_4,z_5,z_6)$. The fields $\mathcal{L}_k$ are linearly independent outside their discriminant variety $Δ\subset \mathbb{C}^6$ and tangent to this variety. We describe a polynomial Lie algebra of the fields $\mathcal{L}_k$ and the structure of the polynomial ring $\mathbb{C}[X, Z]$ as a graded module with two generators $x_2$ and $z_4$ over this algebra. The fields $\mathcal{L}_1$ and $\mathcal{L}_3$ commute. Any polynomial $P(X,Z) \in \mathbb{C}[X, Z]$ determines a hyperelliptic function $P(X,Z)(u_1, u_3)$ of genus $2$, where $u_1$ and $u_3$ are coordinates of trajectories of the fields $\mathcal{L}_1$ and $\mathcal{L}_3$. The function $2 x_2(u_1, u_3)$ is a 2-zone solution of the KdV hierarchy and $\frac{\partial}{\partial u_1}z_4(u_1, u_3)=\frac{\partial}{\partial u_3}x_2(u_1, u_3)$.
PV vs. Seasonal Load Curve: Adaptation via a Shift of Holiday Period
Creators: name: Krauter, S.
Publisher: name: WIP
Year: 2015
Subjects: PV - A MAJOR ELECTRICITY SOURCE
PV in the Electricity Markets

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 3135-3136
description: PV will play a major role in the global renewable energy portfolio. However, PV generation profile
often does not match with the consumption profile, in particular under moderate climate conditions: In these regions,
consumption is highest during the winter period, while PV generation is highest during the summer period. This
mismatch is even more pronounced by the present working and holiday behavior: A considerable part of the
population leaves for holiday during the summer period and thus additionally reducing consumption in a market with
energy overproduction, thus causing additional costs for electricity system management. Usually, inefficient and
costly technical measures are under consideration to overcome that problem: Seasonal storage for PV power or even
PV curtailment. This paper shows the shift of the holiday season as a new, effective and non-technical load-shifting
measure: Fast implementation, low costs, additional benefits (such as less infrastructure costs: less office heating, less
healthcare costs, more bicycles instead of cars & public transport., thus reducing CO2 emissions).
Visuo-Haptic Object Perception for Robots: An Overview
Creators: name: Navarro-Guerrero, Nicolás
name: Toprak, Sibel
name: Josifovski, Josip
name: Jamone, Lorenzo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The object perception capabilities of humans are impressive, and this becomes even more evident when trying to develop solutions with a similar proficiency in autonomous robots. While there have been notable advancements in the technologies for artificial vision and touch, the effective integration of these two sensory modalities in robotic applications still needs to be improved, and several open challenges exist. Taking inspiration from how humans combine visual and haptic perception to perceive object properties and drive the execution of manual tasks, this article summarises the current state of the art of visuo-haptic object perception in robots. Firstly, the biological basis of human multimodal object perception is outlined. Then, the latest advances in sensing technologies and data collection strategies for robots are discussed. Next, an overview of the main computational techniques is presented, highlighting the main challenges of multimodal machine learning and presenting a few representative articles in the areas of robotic object recognition, peripersonal space representation and manipulation. Finally, informed by the latest advancements and open challenges, this article outlines promising new research directions.
description: published in Autonomous Robots
The PV Market Developments in Greece, Net-Metering Study Cases
Creators: name: Tselepis, S.
Publisher: name: WIP
Year: 2015
Subjects: PV - A MAJOR ELECTRICITY SOURCE
PV Business Opportunities

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 3166-3170
description: This paper presents the state of the PV market in Greece, the achievements so far, the current situation and proposals for next years. The PV market environment in terms of new PV development policies is presented, such as net-metering. The net-metering long awaited program framework is expected to regenerate the PV market in Greece, It was finally introduced at the end of 2014 and the program procedures were put in operation in May 2015 for the low voltage PV systems. Study cases for the viability of the new PV net-metering program are presented for a household and a commercial enterprise.
Impact of PV Production on Wholesale Electricity Prices
Creators: name: El Gammal, A.
name: Masson, G.
name: Gouzerh, H.
name: Gourvitch, N.
name: Heris, S.
name: Orlandi, S.
name: Ngo, T.M.N.
Publisher: name: WIP
Year: 2015
Subjects: PV - A MAJOR ELECTRICITY SOURCE
PV in the Electricity Markets

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 3117-3123
description: This study provides an update of the 2014 paper “Quantitative Analysis Of The Merit Order Effect From
Photovoltaic Production In Key European Countries” from M.Gourvitch, M.Gouzerh, M.Masson and Ms Orlandi. It
provides a method to quantify the savings in a set of European countries over the past 9 years as a result of the decrease in
electricity spot market prices observed when PV plants feed electricity into the grid. The study confirms the previous finding
that the total electricity demand retreated by PV production is well correlated to market prices, following a stable exponential
curve. It proposes a calculation of what the additional energy payments would have been necessary, had there been no PV
production on the geographical market constituted by Germany, Austria, France, Switzerland and Italy (GAFSI). Such gain is
called the Merit Order Effect (MOE). The level of the MOE depends widely on how the demand profile is well correlated with
the PV production. The cumulative gain over the period 2006 to 2014 reaches
€ 26 Bn for the whole GAFSI region. On average, the wholesale prices would have been 3.7% higher over the 9 year period,
had there not be PV electricity fed into the grid. The paper also brings confirmation on the proposition that the magnitude of
the MOE decreases when the penetration of PV in the energy mix increases.
Financial Analysis of PV Plants Based on New Method of LCOE Estimation Using Reliability Block Diagram –– Case Study Villa Lobos Project in Sao Paulo, Brazil
Creators: name: Shimura, S.
name: Silva Simplicio, R.
name: Herrero Alonso, R.
name: Biasi De Moura, C.
name: Knörich Zuffo, M.
name: De Deus Lopes, R.
name: Baesso Grimonni, J.A.B.
Publisher: name: WIP
Year: 2015
Subjects: PV - A MAJOR ELECTRICITY SOURCE
PV Business Opportunities

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 3171-3176
description: In the first part of this work, a methodology for comparing PV plant configuration (number of
inverters, string size and cabling configuration) was proposed based on the Levelised Cost of Energy (LCOE) and
availability. Due to the use of Reliability Block diagrams, LCOE estimate was improved by using a model that takes
into consideration items such as: local labor costs, inventory costs and the effect of availability of subsystems on the
total production of the PV plant. Three different configurations were analyzed: one with centralized inverter topology
and two with decentralized inverter topology. A reliability block diagram model was built for each configuration and
simulation results were presented. In this second part, a financial analysis is made considering the expected operating
life of the PV plant, PV module efficiency reduction throughout the years, capacity factor and costs (invested capital
and operations and maintenance). Two main results are presented for each configuration: the maximum capital
investment for breakeven in 25 years at a fixed interest rate; the Internal Rate of Return (IRR) in 25 years.
Gating-Induced Mott Transition in NiS$_2$
Creators: name: Day-Roberts, Ezra
name: Fernandes, Rafael M.
name: Birol, Turan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: NiS$_2$ has been widely regarded as a model system to study the bandwidth-controlled Mott transition, as enabled by isovalent Se chemical substitution on the S sites. Motivated by advances in electrolyte gating, we theoretically investigate the filling-controlled Mott transition induced by gating, which has the advantage of avoiding dopant disorder and stoichiometric changes. We use combined Density Functional Theory (DFT) and Dynamical Mean Field Theory (DMFT) to study such a filling-controlled transition and compare it with the case of bandwidth control. We draw a temperature-filling phase diagram and find that the Mott-insulator to metal transition occurs with modest added electron concentrations, well within the capabilities of existing electrolyte gating experiments. We find that there is significant incoherent weight at the Fermi level in the metallic phase when the transition is induced by gating. In contrast, the spectral weight remains rather coherent in the case of the bandwidth-controlled transition.
Nyctimene sanctacrucis Troughton 1931
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Nyctimene
Nyctimene sanctacrucis

description: Nyctimene sanctacrucis Troughton, 1931. Proc. Linn. Soc. N.S.W., 56:206. TYPE LOCALITY: Solomon Isis, Santa Cruz Isis. DISTRIBUTION: Santa Cruz Isis.
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 144, DOI: 10.5281/zenodo.7353060
From Chemistry to Functionality: Trends for the Length Dependence of the Thermopower in Molecular Junctions
Creators: name: Hüser, Falco
name: Solomon, Gemma C.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a systematic ab-initio study of the length dependence of the thermopower in molecular junctions. The systems under consideration are small saturated and conjugated molecular chains of varying length attached to gold electrodes via a number of different binding groups. Different scenarios are observed: linearly increasing and decreasing thermopower as function of the chain length as well as positive and negative values for the contact thermopower. Also deviation from the linear behaviour is found. The trends can be explained by details of the transmission, in particular the presence, position and shape of resonances from gateway states. We find that these gateway states do not only determine the contact thermopower, but can also have a large influence on the length-dependence itself. This demonstrates that simple models for electron transport do not apply in general and that chemical trends are hard to predict. Furthermore, we discuss the limits of our approach based on Density Functional Theory and compare to more sophisticated methods like self-energy corrections and the GW theory.
A Runtime Environment for Contract Automata
Creators: name: Basile, Davide
name: ter Beek, Maurice H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: Contract automata have been introduced for specifying applications through behavioural contracts and for synthesising their orchestrations as finite state automata. This paper addresses the realisation of applications from contract automata specifications. We present CARE, a new runtime environment to coordinate services implementing contracts that guarantees the adherence of the implementation to its contract. We discuss how CARE can be adopted to realise contract-based applications, its formal guarantees, and we identify the responsibilities of the involved business actors. Experiments show the benefits of adopting CARE with respect to manual implementations.
Nyctimene vizcaccia Thomas 1914
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Nyctimene
Nyctimene vizcaccia

description: Nyctimene vizcaccia Thomas, 1914. Ann. Mag. Nat. Hist., ser. 8, 13:436. TYPE LOCALITY: New Guinea, Umboi Isl (off NE coast) DISTRIBUTION: Umboi Isl, Bismarck Arch., Solomon Isis. SYNONYMS: bougainville, minor. COMMENTS: Includes bougainville; see Smith and Hood (1983). Includes minor, but see Peterson (1991). Formerly included in N. cephalotes, but see Smith and Hood (1983).
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 145, DOI: 10.5281/zenodo.7353060
description: {"references": ["Smith, J. D., and C. S. Hood. 1983. A new species of tube-nosed fruit bat (Nyctimene) from the Bismark Archipelago, Papua New Guinea. Occasional Papers, The Museum, Texas Tech University, 81: 1 - 14.", "Peterson, R. L. 1991. Systematic variation in the megachiropteran tube-nosed bats Nyctimene cyclotis and N. certans. Bulletin of the American Museum of Natural History, 206: 26 - 41."]}
Penguin Effects in $B_d^0\to J/ψK^0_S$ and $B_s^0\to J/ψϕ$
Creators: name: Barel, Marten Z.
name: De Bruyn, Kristof
name: Fleischer, Robert
name: Malami, Eleftheria
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Controlling the contributions from doubly Cabibbo-suppressed penguin topologies in the decays $B_d^0\to J/ψK^0_S$ and $B_s^0\to J/ψϕ$ is mandatory to reach the highest possible precision in the measurement of the $B^0_q$--$\bar B^0_q$ ($q=d,s$) mixing phases $ϕ_d$ and $ϕ_s$. The penguin contributions can be determined using a strategy based on the $SU(3)$ flavour symmetry of QCD. Using the latest experimental data, we update our combined analysis of the decays $B_d^0\to J/ψK^0_S$, $B_s^0\to J/ψϕ$ and their control channels $B_s^0\to J/ψK^0_S$, $B_d^0\to J/ψπ^0$ and $B_d^0\to J/ψρ^0$. This allows us to simultaneously determine the penguin parameters and both mixing phases. We discuss how the branching fractions of these decays can be used to probe the size of non-factorisable $SU(3)$-breaking effects, which form the main theoretical uncertainty associated with our $SU(3)$-based strategy, and provide new insights into the factorisation approach.
description: Contribution to the Proceedings of the 11th International Workshop on the CKM Unitarity Triangle (CKM2021), 22-26 November 2021, The University of Melbourne, Australia
Carrier density driven lasing dynamics in ZnO nanowires
Creators: name: Wille, Marcel
name: Sturm, Chris
name: Michalsky, Tom
name: Röder, Robert
name: Ronning, Carsten
name: Schmidt-Grund, Rüdiger
name: Grundmann, Marius
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on the temporal lasing dynamics of high quality ZnO nanowires using time-resolved micro-photoluminescence technique. The temperature dependence of the lasing characteristics and of the corresponding decay constants demonstrate the formation of an electron-hole plasma to be the underlying gain mechanism in the considered temperature range from 10 K to 300 K. We found that the temperature dependent emission onset-time ($t_{\text{on}}$) strongly depends on the excitation power and becomes smallest in the lasing regime, with values below 5 ps. Furthermore, the observed red shift of the dominating lasing modes in time is qualitatively discussed in terms of the carrier density induced change of the refractive index dispersion after the excitation laser pulse. This theory is supported by extending an existing model for the calculation of the carrier density dependent complex refractive index for different temperatures. This model coincides with the experimental observations and reliably describes the evolution of the refractive index after the excitation laser pulse.
description: 7 pages, 5 figures
Water megamaser and central black hole masses in a large sample of galaxies
Creators: name: Farhan, A.
name: Ercan, E. N.
name: Tombesi, F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Extragalactic water maser emissions at 22 GHz have been playing vital roles in astrophysics. The limited detection rate of these masers has been motivating researchers to find clues that can help characterise them. The physical environments 22 GHz masers formed in are still ambiguous. Accordingly, statistical studies have been thoroughly used to resolve these favourable environments. This work goes through the essential parameter of Active Galactic Nuclei (AGN), namely, the mass of the central supermassive black hole (MBH) of the maser host galaxy. We study the correlation between maser luminosity (LH2O) and MBH in sub-samples of megamasers (MMs), kilomasers (KMs), and disc masers. The regression line of the relation is also calculated for these sub-samples. Unlike the results of previous works, dividing the maser sample into MMs and KMs gives no privilege to MM galaxies. Contrary to expectation, KMs have weak and low significant LH2O - MBH correlation, while MMs show no correlation. The positive correlation in KMs can be explained by the role of AGN therein, while the diversity of MMs types, with some of which are not strongly related to AGN, may explain the correlation missing. Surprisingly, the 28 disc maser sample, where tight correlation is expected, shows a very weak and low significant LH2O-MBH correlation. Future VLBI studies will eventually lead to a specific classification of a good number of maser galaxies, which is essential to establishing the LH2O-MBH relation.
Large Order-Invariant Bayesian VARs with Stochastic Volatility
Creators: name: Chan, Joshua C. C.
name: Koop, Gary
name: Yu, Xuewen
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: Many popular specifications for Vector Autoregressions (VARs) with multivariate stochastic volatility are not invariant to the way the variables are ordered due to the use of a lower triangular parameterization of the error covariance matrix. We show that the order invariance problem in existing approaches is likely to become more serious in large VARs. We propose the use of a specification which avoids the use of this lower triangular parameterization. We show that the presence of multivariate stochastic volatility allows for identification of the proposed model and prove that it is invariant to ordering. We develop a Markov chain Monte Carlo algorithm which allows for Bayesian estimation and prediction. In exercises involving artificial and real macroeconomic data, we demonstrate that the choice of variable ordering can have non-negligible effects on empirical results when using the nonorder invariant approach. In a macroeconomic forecasting exercise involving VARs with 20 variables we find that our order-invariant approach leads to the best forecasts and that some choices of variable ordering can lead to poor forecasts using a conventional, non-order invariant, approach.
Plasmons in tunnel-coupled graphene layers: backward waves with quantum cascade gain
Creators: name: Svintsov, Dmitry
name: Devizorova, Zhanna
name: Otsuji, Taiichi
name: Ryzhii, Victor
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Plasmons in van der Waals heterostructures comprised of graphene and related layered materials demonstrate deep subwavelength confinement and large propagation length. In this letter, we show that graphene-insulator-graphene tunnel structures can serve as plasmonic gain media. The gain stems from the stimulated electron tunneling accompanied by the emission of coherent plasmons under interlayer population inversion. The probability of tunneling with plasmon emission appears to be resonantly large at certain values of frequency and interlayer voltage corresponding to the transitions between electron states with collinear momenta - a feature unique to the linear band structure of graphene. The dispersion of plasmons undergoes a considerable transformation due to the tunneling as well, demonstrating negative group velocity in several frequency ranges.
description: 13 pages, 10 figures. arXiv admin note: text overlap with arXiv:1509.03776
The PV-Regel Project – Development of Concepts and Solutions for the Provision of Control Reserve with PV
Creators: name: Premm, D.
name: Osterkamp, B.
name: Seidel, J.
name: Poehling, S.
name: Unru, A.
name: Engel, B.
Publisher: name: WIP
Year: 2015
Subjects: PV - A MAJOR ELECTRICITY SOURCE
PV in the Electricity Markets

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 3124-3128
description: National and international climate objectives provide a massive expansion of clean energy resources in
the upcoming decades. As a consequence, the increasing number of renewable energy systems and the decreasing
number of conventional power plants lead to the inevitable step of taking over system responsibility for photovoltaics
(PV). The research project PV-Regel addresses the system responsibility for PV by developing new concepts and by
determining suitable market conditions for providing control reserve with PV systems. First investigations show that
PV systems with appropriate communication and control capabilities can easily be combined to virtual power plants
and are very dynamic and precise in providing negative and positive control reserve even without additional energy
storages. One challenge is the verification method of the provided control reserve. The validation of the method
‘available active power’ will be part of the project PV-Regel. A prototypal PV inverter, which has already been
developed, shows the feasibility of this method. Even the required accuracy can be satisfied by PV systems.
Otopteropus Kock 1969
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Otopteropus

description: Otopteropus Kock, 1969. Senckenberg. Biol., 50:329. TYPE SPECIES: Otopteropus cartilagonodus Kock, 1969.
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 145, DOI: 10.5281/zenodo.7353060
Large Order-Invariant Bayesian VARs with Stochastic Volatility
Creators: name: Chan, Joshua C. C.
name: Koop, Gary
name: Yu, Xuewen
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: Many popular specifications for Vector Autoregressions (VARs) with multivariate stochastic volatility are not invariant to the way the variables are ordered due to the use of a lower triangular parameterization of the error covariance matrix. We show that the order invariance problem in existing approaches is likely to become more serious in large VARs. We propose the use of a specification which avoids the use of this lower triangular parameterization. We show that the presence of multivariate stochastic volatility allows for identification of the proposed model and prove that it is invariant to ordering. We develop a Markov Chain Monte Carlo algorithm which allows for Bayesian estimation and prediction. In exercises involving artificial and real macroeconomic data, we demonstrate that the choice of variable ordering can have non-negligible effects on empirical results when using the non-order invariant approach. In a macroeconomic forecasting exercise involving VARs with 20 variables we find that our order-invariant approach leads to the best forecasts and that some choices of variable ordering can lead to poor forecasts using a conventional, non-order invariant, approach.
Connections between Deep Equilibrium and Sparse Representation Models with Application to Hyperspectral Image Denoising
Creators: name: Gkillas, Alexandros
name: Ampeliotis, Dimitris
name: Berberidis, Kostas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this study, the problem of computing a sparse representation of multi-dimensional visual data is considered. In general, such data e.g., hyperspectral images, color images or video data consists of signals that exhibit strong local dependencies. A new computationally efficient sparse coding optimization problem is derived by employing regularization terms that are adapted to the properties of the signals of interest. Exploiting the merits of the learnable regularization techniques, a neural network is employed to act as structure prior and reveal the underlying signal dependencies. To solve the optimization problem Deep unrolling and Deep equilibrium based algorithms are developed, forming highly interpretable and concise deep-learning-based architectures, that process the input dataset in a block-by-block fashion. Extensive simulation results, in the context of hyperspectral image denoising, are provided, which demonstrate that the proposed algorithms outperform significantly other sparse coding approaches and exhibit superior performance against recent state-of-the-art deep-learning-based denoising models. In a wider perspective, our work provides a unique bridge between a classic approach, that is the sparse representation theory, and modern representation tools that are based on deep learning modeling.