cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Slant products on the Higson-Roe exact sequence
Creators: name: Engel, Alexander
name: Wulff, Christopher
name: Zeidler, Rudolf
Publisher: name: arXiv
Year: 2019
Subjects: subject: K-Theory and Homology (math.KT)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 58J22, 19K33, 46L80, 51F30

description: We construct a slant product $/ \colon \mathrm{S}_p(X \times Y) \times \mathrm{K}_{1-q}(\mathfrak{c}^{\mathrm{red}}Y) \to \mathrm{S}_{p-q}(X)$ on the analytic structure group of Higson and Roe and the K-theory of the stable Higson corona of Emerson and Meyer. The latter is the domain of the co-assembly map $μ^\ast \colon \mathrm{K}_{1-\ast}(\mathfrak{c}^{\mathrm{red}}Y) \to \mathrm{K}^\ast(Y)$. We obtain such products on the entire Higson--Roe sequence. They imply injectivity results for external product maps. Our results apply to products with aspherical manifolds whose fundamental groups admit coarse embeddings into Hilbert space. To conceptualize the class of manifolds where this method applies, we say that a complete $\mathrm{spin}^{\mathrm{c}}$-manifold is Higson-essential if its fundamental class is detected by the co-assembly map. We prove that coarsely hypereuclidean manifolds are Higson-essential. We draw conclusions for positive scalar curvature metrics on product spaces, particularly on non-compact manifolds. We also obtain equivariant versions of our constructions and discuss related problems of exactness and amenability of the stable Higson corona.
description: 82 pages; v2: Minor improvements. To appear in Ann. Inst. Fourier
In or Out: Efficient inclusion of installations in an Emissions Trading Scheme?
Creators: name: Betz, Regina
name: Sanderson, Todd
name: Ancev, Tihomir
name: Betz, Regina
name: Sanderson, Todd
name: Ancev, Tihomir
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: Resource /Energy Economics and Policy
subject: Emissions Trading Scheme
subject: Environmental Policy
subject: Installation Coverage
subject: Transaction costs.

description: Regulators around the world are currently considering national emissions trading systems (ETS) as a cost-effective way to reduce greenhouse gas emissions. ETS installations coverage is one of the numerous design issues confronting them. ‘Blanket coverage’ that includes all an economy’s industrial emitters of greenhouse gases has some intuitive appeal. Although it seems equitable it does not, however, take into full account all the costs related to the extent of coverage. This report shows how an alternative approach of ‘efficient coverage’ can achieve the same emission reduction outcome at lower social cost. The approach is based on maximising the benefits of including installations in an ETS, while at the same time taking into account all relevant transaction costs. A broad definition of transaction costs is used – the regulatory costs to the government as well as regulatory costs imposed on covered installations. Particularly for relatively modest emissions reduction targets, the study found there are significant cost savings with an ‘efficient coverage’ compared with ‘blanket coverage’.
Auctioning Greenhouse Gas Emissions Permits in Australia
Creators: name: Betz, Regina
name: Seifert, Stefan
name: Cramton, Peter
name: Kerr, Suzi
name: Betz, Regina
name: Seifert, Stefan
name: Cramton, Peter
name: Kerr, Suzi
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: Resource /Energy Economics and Policy
subject: Climate policy
subject: Greenhouse gases
subject: Auctions
subject: Emissions trading

description: Allocating permits based on individual historical emissions (‘grandfathering’), or industry benchmark data, is an important design aspect of an emissions trading scheme. Free permit allocation has proven complex and inefficient (particularly in the European Union) with distribution implications also politically difficult to justify. For these reasons, auctioning emissions permits has become more popular than allocating permits. The European Union is now moving towards auctioning more than 50 per cent of all permits in 2013. In the US, the Regional Greenhouse Gas Initiative (RGGI) has started with auctioning 100 per cent of permits. The Australian proposal for a Carbon Pollution Reduction Scheme (CPRS) also provides for auctioning a significant share of total permits. This report discusses important theoretical and practical auction design aspects for allocating emissions permits in Australia. Particularly interesting is the proposal to simultaneously auction multiple emissions units of different vintages. The specific design details proposed have been adopted by the Australian Government in their CPRS White Paper.
Inflaton Effective Potential from Fermions for General $ε$
Creators: name: Sivasankaran, A.
name: Woodard, R. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We accurately approximate the contribution of a Yukawa-coupled fermion to the inflaton effective potential for inflationary geometries with a general first slow roll parameter $ε(t)$. For $ε= 0$ our final result agrees with the famous computation of Candelas and Raine done long ago on de Sitter background, and both computations degenerate to the result of Coleman and Weinberg in the flat space limit. Our result contains a small part that depends nonlocally on the inflationary geometry. Even in the numerically larger local part, very little of the $ε$ dependence takes the form of Ricci scalars. We discuss the implications of these corrections for inflation.
description: 25 pages, 9 figures, uses LaTeX2e. Version 2 (32 pages, 11 figures) substantially revised to provide a detailed comparison between the effective potential and the classical potential, and to explain the tendency for smooth potentials to favor high reheat temperatures
Self-assembly of carbon-nanotube-based single electron memories
Creators: name: Marty, L.
name: Bonnot, A. -M.
name: Iaia, A.
name: Naud, C.
name: Bonhomme, A.
name: Andre, E.
name: Bouchiat, V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate wafer-scale integration of single electron memories based on carbon nanotube field effect transistors (cnfets) by a complete self assembly process. First, a dry self assembly based on a Hot Filament assisted Chemical Vapor Deposition technique allows both localized growth and in situ electrical connection of carbon nanotubes on predefined catalytic electrodes. The semiconducting carbon nanotubes integration yield can exceed 50% for a batch. Secondly, a wet self-assembly attaches single 30 nm-diameter gold bead in the nanotube vicinity via chemical functionalization. The bead acts as the memory storage node while the cnfet operated in the subthreshold regime is an electrometer having exponential gain. Below 50 K, the transfer characteristics of some functionalized cnfets show highly reproducible hysteretical steps whose height can reach one decade of current. Evaluation of the capacitance confirms these current steps originate from single electron transfers between the bead and the nanotubes with a time retention exceeding 550s at 1.5K.
The Future of Renewable Electricity in Australia
Creators: name: Buckman, Greg
name: Diesendorf, Mark
name: Buckman, Greg
name: Diesendorf, Mark
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: Resource /Energy Economics and Policy
subject: Renewable electricity
subject: energy
subject: greenhouse emissions
subject: emissions trading
subject: renewable portfolio standard
subject: feed-in tariff.

description: If long-term greenhouse gas emissions in Australia are to be reduced, renewable energy is likely to be critical. This is particularly so if deep cuts are eventually implemented. Current government policies ( including emissions trading and electricity, the feed-in tariffs announced in 2008), are likely to have only modest impacts on renewable electricity generation in Australia at least until 2020. Australia’s renewable electricity base will remain narrow with little solar technologies’ contribution before 2020. This will not provide an adequate basis for delivering long-term deep cuts to Australia’s greenhouse emissions nor for achieving major greenhouse gas emission reductions at least cost. The future of Australia’s renewable electricity rests mainly with the success, or otherwise, of its Mandatory Renewable Energy Target and expanded Renewable Energy Target. Their effectiveness may be eroded, however, by the long-term banking of tradable certificates used with both target mechanisms. Unless there is a change of policy mechanisms, Australia will probably fail to reach its renewable electricity target of 20 per cent by 2020. Australia will also fail to build up its solar and hot rock geothermal electricity generation capacity to make large supply contributions beyond 2020.
Updated Parameters and a New Transmission Spectrum of HD 97658b
Creators: name: Guo, Xueying
name: Crossfield, Ian J. M.
name: Dragomir, Diana
name: Kosiarek, Molly R.
name: Lothringer, Joshua
name: Mikal-Evans, Thomas
name: Rosenthal, Lee
name: Benneke, Bjorn
name: Knutson, Heather A.
name: Dalba, Paul A.
name: Kempton, Eliza M. R.
name: Henry, Gregory W.
name: McCullough, P. R.
name: Barman, Travis
name: Blunt, Sarah
name: Chontos, Ashley
name: Fortney, Jonathan
name: Fulton, Benjamin J.
name: Hirsch, Lea
name: Howard, Andrew W.
name: Isaacson, Howard
name: Matthews, Jaymie
name: Mocnik, Teo
name: Morley, Caroline
name: Petigura, Erik A.
name: Weiss, Lauren M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent years have seen increasing interest in the characterization of sub-Neptune sized planets because of their prevalence in the Galaxy, contrasted with their absence in our solar system. HD 97658 is one of the brightest stars hosting a planet of this kind, and we present the transmission spectrum of this planet by combining four HST transits, twelve Spitzer/IRAC transits, and eight MOST transits of this system. Our transmission spectrum has higher signal to noise ratio than that from previous works, and the result suggests that the slight increase in transit depth from wavelength 1.1 to 1.7 microns reported in previous works on the transmission spectrum of this planet is likely systematic. Nonetheless, our atmospheric modeling results are not conclusive as no model provides an excellent match to our data. Nonetheless we find that atmospheres with high C/O ratios (C/O >~ 0.8) and metallicities of >~ 100x solar metallicity are favored. We combine the mid-transit times from all the new Spitzer and MOST observations and obtain an updated orbital period of P=9.489295 +/- 0.000005 d, with a best-fit transit time center at T_0 = 2456361.80690 +/- 0.00038 (BJD). No transit timing variations are found in this system. We also present new measurements of the stellar rotation period (34 +/- 2 d) and stellar activity cycle (9.6 yr) of the host star HD 97658. Finally, we calculate and rank the Transmission Spectroscopy Metric of all confirmed planets cooler than 1000 K and with sizes between 1 and 4 R_Earth. We find that at least a third of small planets cooler than 1000 K can be well characterized using JWST, and of those, HD 97658b is ranked fifth, meaning it remains a high-priority target for atmospheric characterization.
description: Accepted to AJ. 29 pages, 21 figures, 11 tables, 2 machine-readable tables (system RVs and TSM values). v2: updated typos
Additional file 1 of Draft genome sequence of antimicrobial producing Paenibacillus alvei strain MP1 reveals putative novel antimicrobials
Creators: name: Pajor, Magdalena
name: Sogin, Jonathan
name: Worobo, Randy W.
name: Szweda, Piotr
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Data 1. The QUAST Summary table.
Lower tensor to scalar ratio in a SUGRA motivated inflationary potential
Creators: name: Adhikari, Rathin
name: Gangopadhyay, Mayukh R.
name: Yogesh
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A scalar potential obtained from the $D$-term in the Supergravity models, which dominates over $F$ term and is mainly responsible for the inflationary phase in the early universe, is studied. The potential with canonical kinetic terms for scalar fields in the Lagrangian, has a very slow roll feature in comparison to various other plateau type inflationary potentials. In this case, a much lower tensor-to-scalar ratio ($r$) of $\mathcal{O}(10^{-3})$ is achievable. The requirement of slow roll condition for the inflation potential implies that the up type neutral scalar and the down type neutral scalar in Supergravity models are with equal field strength at the time of inflation. If this relationship holds down to the electroweak scale for the corresponding $vev$ values of these fields, then it will indicate a higher SUSY breaking scale around 100 TeV. The predicted values of the inflationary observables are well within the 1-$σ$ bounds of the recent constraints from {\it Planck'18} observations. The era of reheating after the inflationary phase, is also studied and the bounds on the reheating temperature ($T_{re}$) is calculated for a different equation of states during reheating ($w_{re}$) for the {\it Planck'18} allowed values of the scalar spectral index ($n_s$). For our model with $w_{re}=2/3$ and $w_{re}=1$, after satisfying all the bounds due to gravitino overproduction, we can have big parameter space for $T_{re}$ which is well inside {\it Planck'18} 1-$σ$ bound on $n_s$.
description: 10 pages, 3 figures
Additional file 1 of Risk factors for and clinical outcomes of carbapenem non-susceptible gram negative bacilli bacteremia in patients with acute myelogenous leukemia
Creators: name: Shin, Dong Hoon
name: Dong-Yeop Shin
name: Kang, Chang Kyung
name: Suhyeon Park
name: Jieun Park
name: Jun, Kang Il
name: Kim, Taek Soo
name: Youngil Koh
name: Hong, Jun Shik
name: Pyoeng Gyun Choe
name: Park, Wan Beom
name: Nam-Joong Kim
name: Yoon, Sung-Soo
name: Inho Kim
name: Myoung-Don Oh
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Hematology
subject: Computational Biology

description: Additional file 1: Table S1. Risk factors for gram negative bacilli bacteremia-attributed mortality. Table S2. Risk factors for carba-NS GNB bacteremia while not using carbapenem. Table S3. Risk factors for in-hospital mortality while not using carbapenem.
Few-Shot Bearing Fault Diagnosis Based on Model-Agnostic Meta-Learning
Creators: name: Zhang, Shen
name: Ye, Fei
name: Wang, Bingnan
name: Habetler, Thomas G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The rapid development of artificial intelligence and deep learning has provided many opportunities to further enhance the safety, stability, and accuracy of industrial Cyber-Physical Systems (CPS). As indispensable components to many mission-critical CPS assets and equipment, mechanical bearings need to be monitored to identify any trace of abnormal conditions. Most of the data-driven approaches applied to bearing fault diagnosis up-to-date are trained using a large amount of fault data collected a priori. In many practical applications, however, it can be unsafe and time-consuming to collect sufficient data samples for each fault category, making it challenging to train a robust classifier. In this paper, we propose a few-shot learning framework for bearing fault diagnosis based on model-agnostic meta-learning (MAML), which targets for training an effective fault classifier using limited data. In addition, it can leverage the training data and learn to identify new fault scenarios more efficiently. Case studies on the generalization to new artificial faults show that the proposed framework achieves an overall accuracy up to 25% higher than a Siamese network-based benchmark study. Finally, the robustness and the generalization capability of the proposed framework are further validated by applying it to identify real bearing damages using data from artificial damages, which compares favorably against 6 state-of-the-art few-shot learning algorithms using consistent test environments.
Environmental Economics of Ethanol Production – a brief introduction
Creators: name: Evers, Jonathan Rhys
name: Hundloe, Tor
name: Daniels, Peter L.
name: Evers, Jonathan Rhys
name: Hundloe, Tor
name: Daniels, Peter L.
Publisher: name: Unknown
Year: 2009
Subjects: Agricultural and Food Policy
Environmental Economics and Policy
Resource /Energy Economics and Policy

description: By treating organic wastes as a resource, and applying a different method of waste management, organic wastes could contribute significantly to global energy needs. The ethanol distillation process waste product, stillage, is a soup-like waste stream that contains substantial organic content. By digesting this material three resources are recovered – biogas (80 per cent methane), biosolids (high in nutrients equivalent to high grade fertiliser) and recyclable water. Current waste treatment in ethanol production focuses on drying the stillage waste and using the resultant material as mulch to be spread over crops. This is an energy intensive, low-benefit, process that increases production cost. If a waste treatment process could convert the waste into a recoverable resource, this would reduce the cost of ethanol production and would ensure all externalities are valued. For example, methane could be re-used as a source of energy in distillation and production. Unless an economic advantage can be established, there is no true benefit of this type of waste treatment – this is how the economy currently works. All industry and business decisions relate to the bottom line and whether the project will make money (profitability). When a value is put on externalities, it is possible to show whether a project will be profitable. This is so even when considering the impact on the environment and society, not just the economy. Ultimately, when all externalities can be quantified, valued and shown to be positive, the project is sustainable. This research has been carried out to establish the importance of valuing externalities in relation to the triple bottom line of ethanol production. By using waste treatment to recover resources in ethanol distillation, and using those resources directly in operation, process and production, while at the same time valuing foregone and used externalities, the cost of production should decrease Values for the externalities can be derived from various references, such as current market value. Carbon now has a value per tonne of emissions established in several markets around the world – these values can be attributed directly to energy use. The value of water has been established through research and can also be attributed to water use.
Identification from data with periodically missing output samples
Creators: name: Markovsky, Ivan
name: Alsalti, Mohammad
name: Lopez, Victor G.
name: Müller, Matthias A.
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2024
Subjects: subject: system identification
subject: missing data
subject: behavioral approach
subject: lifting
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The identification problem in case of data with missing values is challenging and currently not fully understood. For example, there are no general nonconservative identifiability results, nor provably correct data efficient methods. In this paper, we consider a special case of periodically missing output samples, where all but one output sample per period may be missing. The novel idea is to use a lifting operation that converts the original problem with missing data into an equivalent standard identification problem. The key step is the inverse transformation from the lifted to the original system, which requires computation of a matrix root. The well-posedness of the inverse transformation depends on the eigenvalues of the system. Under an assumption on the eigenvalues, which is not verifiable from the data, and a persistency of excitation-type assumption on the data, the method based on lifting recovers the data-generating system. (Preprint submitted to Automatica)
AVTOMOBIL YO'LARIDA KO'NDALANG VA BO'YLAMA SHOVQIN TASMALARINING QO'LLANILISHI
Creators: name: Jabbarova, Moxira
Publisher: name: Zenodo
Year: 2024

description: Yo’l transportining jiddiy muammolaridan biri uzoq vaqt davomida yuqori va barqaror tezlikda harakatlanishiga imkon beradigan yo’l bo’laklarida haydovchilarning hushyorligini yo’qotishi va uxlab qolishidir. Yo’ldagi vaziyatning bir xilligi (monoton), yo’l qoplamasining ravonligi haydovchilar e’tiborining xiralashishiga, uxlab qolishlariga va natijada asosiy harakatlanish tasmasidan chetga chiqib ketishiga yoki qarama-qarshi harakatlanish tasmalariga chiqishiga olib keladi. Ushbu sabablarga ko’ra baxtsiz hodisalar jiddiy oqibatlarni keltirib chiqaradi. Maqolada avtomobil yo’llaridagi yo’l-transport hodisalari kuzatilayotgan xavfli uchastkalarida ko’ndalang shovqin tasmalarni joylashtirish hududlari, uning geometrik elementlar va ularga qo’yilgan talablar keltirilgan va avtomobil yo’llarida qo’llaniladigan bo’ylama shovqin tasmasi haqida ma’mulot berib o’tilgan. Bu tasmada harakatlanganda, avtomobil haydovchisi kuchli shovqin va tebranish ta’sirini sezishi va diqqatini keskin oshirishi haqida aytib o’tilgan.
Coccinella Linnaeus
Creators: name: POORANI, J.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Coccinellidae
Coccinella

description: Genus Coccinella Linnaeus
Coccinella Linnaeus, 1758: 364.
Type species: Coccinella septempunctata Linnaeus, 1758, by subsequent designation of Latreille 1810: 432.— Iablokoff-Khnzorian, 1979: 66; 1982: 341.
Coccinella (Dobzhanskia) Iablokoff-Khnzorian, 1970: 70. Type species: Coccinella undecimpunctata Linnaeus, by original designation.
Diagnosis. Form broad oval to distinctly more elongate oval, dorsum moderately to strongly convex, glabrous. Head black, usually with a pair of paler spots, one on either side of eyes. Antenna 11-segmented, shorter than head capsule width, with a distinct three-segmented club. Pronotum black with anterolateral angles pale yellow or red, sometimes joined together by a narrow median band along the anterior margin. Elytra orange yellow to red, with black spots or other patterns. Interspaces between punctures on head and pronotum with reticulate microsculpture. Prothoracic hypomeron without foveae, prosternal process narrow, flat, with a pair of convergent or parallel carinae. Mesoventrite with anterior margin scarcely or not emarginate. Middle and hind tibiae with a pair of apical spurs. Tarsal claws appendiculate. Abdominal postcoxal lines incomplete, always with an oblique dividing line. Female genitalia with spermatheca typically having small, wart-like projections on proximal half, nodulus and ramus well-differentiated, infundibulum present.
The frontal spots, pronotal pattern and the incomplete postcoxal line divided by an oblique line readily distinguish this genus from its relatives. The external markings usually suffice for identifying the species, though some are highly polymorphic.
Distribution. This genus contains about 50 species occurring primarily in the Holarctic region (Ślipiński et al. 2020) and extending to the Orient, Africa and the Pacific. The species are primarily aphidophagous and frequent grasses, herbs and other low growing vegetation (Gordon & Vandenberg 1995).
Affinities. Tomaszewska et al. (2021) recognized the Coccinella- group of genera in a clade comprising a mixture of Old World and Nearctic genera forming six subclades. They recovered Coccinella as a weakly supported, paraphyletic sister group of Lioadalia, an African genus.
Included species. About a dozen species are found in the Indian subcontinent and only Coccinella transversalis and C. septempunctata have a wide distribution throughout the region, with the latter being more predominant in the northern and cooler parts of India.
description: Published as part of POORANI, J., 2023, An illustrated guide to lady beetles (Coleoptera: Coccinellidae) of the Indian Subcontinent. Part 1. Tribe Coccinellini, pp. 1-307 in Zootaxa 5332 (1) on pages 77-78, DOI: 10.11646/zootaxa.5332.1.1, http://zenodo.org/record/8261502
Modelling the atomic structure of very high-density amorphous ice
Creators: name: Christie, J. K.
name: Guthrie, M.
name: Tulk, C. A.
name: Benmore, C. J.
name: Klug, D. D.
name: Taraskin, S. N.
name: Elliott, S. R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The structure of very high-density amorphous (VHDA) ice has been modelled by positionally disordering three crystalline phases, namely ice IV, VI and XII. These phases were chosen because only they are stable or metastable in the region of the ice phase diagram where VHDA ice is formed, and their densities are comparable to that of VHDA ice. An excellent fit to the medium range of the experimentally observed pair-correlation function g(r) of VHDA ice was obtained by introducing disorder into the positions of the H2O molecules, as well as small amounts of molecular rotational disorder, disorder in the O--H bond lengths and disorder in the H--O--H bond angles. The low-k behaviour of the experimental structure factor, S(k), is also very well reproduced by this disordered-crystal model. The fraction of each phase present in the best-fit disordered model is very close to that observed in the probable crystallization products of VHDA ice. In particular, only negligible amounts of ice IV are predicted, in accordance with experimental observation.
description: 4 pages, 3 figures, 1 table, v2: changes made in response to referees' comments, the justification for using certain ice phases is improved, and ice IV is now disordered as well
Tertiary Regulation of Cascaded Run-of-the-River Hydropower in the Islanded Renewable Power System Considering Multi-Timescale Dynamics
Creators: name: Qiu, Yiwei
name: Lin, Jin
name: Liu, Feng
name: Dai, Ningyi
name: Song, Yonghua
name: Chen, Gang
name: Ding, Lijie
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: To enable power supply in rural areas and to exploit clean energy, fully renewable power systems consisting of cascaded run-of-the-river hydropower and volatile energies such as pv and wind are built around the world. In islanded operation mode, the primary and secondary frequency control, i.e., hydro governors and automatic generation control (AGC), are responsible for the frequency stability. However, due to limited water storage capacity of run-of-the-river hydropower and river dynamics constraints, without coordination between the cascaded plants, the traditional AGC with fixed participation factors cannot fully exploit the adjustability of cascaded hydropower. When imbalances between the volatile energy and load occur, load shedding can be inevitable. To address this issue, this paper proposes a coordinated tertiary control approach by jointly considering power system dynamics and the river dynamics that couples the cascaded hydropower plants. The timescales of the power system and river dynamics are very different. To unify the multi-timescale dynamics to establish a model predictive controller that coordinates the cascaded plants, the relation between AGC parameters and turbine discharge over a time interval is approximated by a data-based second-order polynomial surrogate model. The cascaded plants are coordinated by optimising AGC participation factors in a receding-horizon manner, and load shedding is minimised. Simulation of a real-life system with real-time pv data collected on site shows the proposed method significantly reduces load loss under pv volatility.
description: Accepted by IET Renewable Power Generation; 13 pages
The Pioneer Anomaly: The Data, its Meaning, and a Future Test
Creators: name: Nieto, Michael Martin
name: Turyshev, Slava G.
name: Anderson, John D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The radio-metric Doppler tracking data from the Pioneer 10/11 spacecraft, from between 20-70 AU, yields an unambiguous and independently confirmed anomalous blue shift drift of a_t = (2.92 \pm 0.44)\times 10^{-18} s/s^2. It can be interpreted as being due to a constant acceleration of a_P = (8.74 \pm 1.33) \times 10^{-8} cm/s^2 directed towards the Sun. No systematic effect has been able to explain the anomaly, even though such an origin is an obvious candidate. We discuss what has been learned (and what might still be learned) from the data about the anomaly, its origin, and the mission design characteristics that would be needed to test it. Future mission options are proposed.
description: 16 pages, 7 figures, to be published in the AIP Conference Proceedings of the 2nd Mexican Meeting on Mathematical and Experimental Physics
Estimating non-market values under scenario and policy ambiguity: the case of climate change mitigation in Australia
Creators: name: Akter, Sonia
name: Bennett, Jeffrey W.
name: Akter, Sonia
name: Bennett, Jeffrey W.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: Resource /Energy Economics and Policy
subject: non-expected utility
subject: scenario ambiguity
subject: policy ambiguity
subject: climate change
subject: Australia

description: This report proposes an extension to existing models of non-expected utility (NEU) in the stated preference (SP) literature. The extension incorporates the impact of multiple sources of ambiguity in individual decision making behaviour. Empirical testing of the proposed decision model was carried out in Australia using a dichotomous choice contingent valuation study of a national carbon pollution reduction scheme (CPRS). The results of the study demonstrate that subjective expectations of the context scenario and subjective policy expectations are important determinants of individual decision making in a stated preference framework. The results of the study also demonstrate that decision weight functions are non-linear (quadratic) in subjective scenario expectations and subjective policy expectation. Although evidence was found to link willingness to pay to scenario ambiguity, policy ambiguity was found to have no statistically significant influence on individual decision making.
Time and price dimensions in an online auction reputation mechanism
Creators: name: Pan, Yin
Publisher: name: University of British Columbia
Year: 2009

description: The reputation mechanism in online auctions provides online auction participants with information about the past behaviour of other participants, in the form of a numerical rating. eBay, which is the most popular online auction website, uses a simple aggregation to summarize and demonstrate participants' reputations. This study proposes and investigates designs for multi-dimensional reputation mechanisms, with time and/or related transaction price information. A laboratory experiment was conducted to empirically test whether the time and price dimensions in a reputation mechanism have significant effects on bidding behaviour of online auction participants, and whether these help participants to better judge the trustworthiness of sellers with a higher level of confidence. A design with one treatment of five levels was adopted and 150 university students were recruited for the experiments. The results showed that the mechanisms with a weighted time and/or price dimension have some ability to enable bidders to better distinguish sellers of different reputation levels, and were perceived to be more helpful to bidders in making bidding decisions.
Echoes of 2HDM inflation at the collider experiments
Creators: name: Modak, Tanmoy
name: Oda, Kin-ya
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the correlation between the constraints on general two Higgs doublet model from Higgs inflation and from collider experiments. The parameter space receives meaningful constraints from direct searches at the Large Hadron Collider and from flavor physics if $m_H$, $m_A$, and $m_{H^\pm}$ are in the sub-TeV range, where $H$, $A$, and $H^\pm$ are the CP even, CP odd, and charged Higgs bosons, respectively. We find that in the parameter region favored by the Higgs inflation, $H$, $A$, and $H^\pm$ are nearly degenerate in mass.We show that such near degeneracy can be probed directly in the upcoming runs of the Large Hadron Collider, while the future lepton colliders such as the International Linear Collider and the Future Circular Collider would provide complementary probes.
description: erratum to Fig. 1, conclusion remains unchanged
title: Polis und Tanz
title: die Bedeutung des Tanzplatzes und des Tanzes für die Formierung der Polis
titleType: Subtitle
Creators: name: Engel, Deborah
Publisher: name: Universität Paderborn
Year: 2022

description: Die Genese der Polis - seit Langem und immer wieder Gegenstand zahlreicher althistorischer Forschungsbeiträge - ist als Prozess zu betrachten, auf den unterschiedliche Faktoren einwirkten und sich gegenseitig bedingten. Mit steigender Komplexität der Lebenswirklichkeit in archaischer Zeit wurde auch die Bewältigung der Aufgaben, denen man sich nur als Gemeinschaft stellen konnte, immer drängender. Die vorliegende Arbeit untersucht, wie in diesem Zusammenhang Tanz als soziale Handlung die gemeinschaftliche Verbundenheit der Polisbürger festigen konnte und damit eine wichtige Rolle bei der Formierung der Polis spielte. Im Vordergrund steht dabei die Analyse komplexer Tanzgeschehen mitsamt ihres sozio-kulturellen Kontextes. Auch der Tanzplatz als sozialer Handlungsraum wird in den Blick genommen.
description: The emergence of the polis - being a well established field of ancient historical research - can be understood as a process that was influenced by various interdependent conditions. Due to growing complexity of life in the archaic period, mastering community tasks became increasingly important. This thesis investigates how dance, viewed as a social activity, contributed to communitarian connectedness and thereby propelled the formation of the polis. An analysis of complex dance-events along with their socio-cultural context is in the main focus of attention. The dancing-venue in its role as a special sphere of action will also be taken into consideration.
Interfuel Substitution: A Meta-Analysis
Creators: name: Stern, David I.
name: Stern, David I.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: Resource /Energy Economics and Policy
subject: Meta-analysis
subject: energy
subject: substitution
subject: elasticity
subject: interfuel

description: Interfuel substitutability has been of longstanding interest to energy economists and policy makers. However, there has been no quantitative meta-analysis of this literature. This research report fills this gap by analysing a broad sample of studies of interfuel substitution in the industrial sector, manufacturing industry or sub-industries, and macro-economy of a variety of developed and developing economies. The primary study sample size has been included in the meta-regression to control for publication bias. At the industrial level, results for the shadow elasticities of substitution between coal, oil, gas, and electricity for forty-six primary studies show that, except for gas-electricity and coal-electricity, there are easy substitution possibilities between all the fuel pairs. Substitution possibilities seem more constrained at the macro level and less constrained in sub-industries. Estimates also vary across countries. Publication bias does not appear to be present, but model and data specification issues very significantly affect the estimates derived by each individual study. Estimates from cross-section regressions are generally largest, and fixed effects panel estimates are intermediate. Time-series estimates are mostly much smaller. Econometric research suggests that the fixed effects estimates, although biased downwards, are likely to be the best among the existing studies.
The Small Scales of the Stochastic Navier Stokes Equations under Rough Forcing
Creators: name: Mattingly, Jonathan C.
name: Suidan, Toufic M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37N10 ;76F20;76F02;60H15;37A25;37A60

description: We prove that the small scale structures of the stochastically forced Navier-Stokes equations approach those of the naturally associated Ornstein-Uhlenbeck process as the scales get smaller. Precisely, we prove that the rescaled k-th spatial Fourier mode converges weakly on path space to an associated Ornstein-Uhlenbeck process as |k| --> infty . In addition, we prove that the Navier-Stokes equations and the naturally associated Ornstein-Uhlenbeck process induce equivalent transition densities if the viscosity is replaced with sufficient hyperviscosity. This gives a simple proof of unique ergodicity for the hyperviscous Navier-Stokes system. We show how different strengthened hyperviscosity produce varying levels of equivalence.
description: Accepted for publication by the Journal of Statistical Physics
Observation of symmetry protected zero modes in topolectrical circuits
Creators: name: Yang, Huanhuan
name: Li, Z. -X.
name: Liu, Yuanyuan
name: Cao, Yunshan
name: Yan, Peng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Higher-order topological insulators are a new class of topological phases of matter, originally conceived for electrons in solids. It has been suggested that $\mathbb{Z}_N$ Berry phase (Berry phase quantized into $2π/N$) is a useful tool to characterize the symmetry protected topological states, while the experimental evidence is still elusive. Recently, topolectrical circuits have emerged as a simple yet very powerful platform for studying topological physics that are challenging to realize in condensed matter systems. Here, we present the first experimental observation of second-order corner states characterized by $\mathbb{Z}_3$ Berry phase in topolectrical circuits. We demonstrate theoretically and experimentally that the localized second-order topological states are protected by a generalized chiral symmetry of tripartite lattices, and they are pinned to "zero energy". By introducing extra capacitors within sublattices in the circuit, we are able to examine the robustness of the zero modes against both chiral-symmetry conserving and breaking disturbances. Our work paves the way for testing exotic topological band theory by electrical-circuit experiments.
description: 6 pages, 5 figures, accepted by Phys. Rev. Research as a Rapid Communication
Fluctuations of the Arctic curve in the tilings of the Aztec diamond on restricted domains
Creators: name: Ferrari, Patrik L.
name: Vető, Bálint
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60B20, 60G55

description: We consider uniform random domino tilings of the restricted Aztec diamond which is obtained by cutting off an upper triangular part of the Aztec diamond by a horizontal line. The restriction line asymptotically touches the arctic circle that is the limit shape of the north polar region in the unrestricted model. We prove that the rescaled boundary of the north polar region in the restricted domain converges to the Airy$_2$ process conditioned to stay below a parabola with explicit continuous statistics and the finite dimensional distribution kernels. The limit is the hard-edge tacnode process which was first discovered in the framework of non-intersecting Brownian bridges. The proof relies on a random walk representation of the correlation kernel of the non-intersecting line ensemble which corresponds to a random tiling.
description: 40 pages, 2 figures
Non-LTE Line-Formation and Abundances of Sulfur and Zinc in F, G, and K Stars
Creators: name: Takeda, Yoichi
name: Hashimoto, Osamu
name: Taguchi, Hikaru
name: Yoshioka, Kazuo
name: Takada-Hidai, Masahide
name: Saito, Yuji
name: Honda, Satoshi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Extensive statistical-equilibrium calculations on neutral sulfur and zinc were carried out, in order to investigate how the non-LTE effect plays a role in the determination of S and Zn abundances in F, G, and K stars. Having checked on the spectra of representative F-type stars (Polaris, Procyon, and alpha Per) and the Sun that our non-LTE corrections yield a reasonable consistency between the abundances derived from different lines, we tried an extensive non-LTE reanalysis of published equivalent-width data of S I and Zn I lines for metal-poor halo/disk stars. According to our calculations, S I 9212/9228/9237 lines suffer significant negative non-LTE corrections amounting to
description: 33 pages, 7 figures, PASJ, Vol. 57, No. 5 (2005) in press
title: Influence of Micro-Pore Connectivity and Micro-Fractures on Calcium Leaching of Cement Pastes — A Coupled Simulation Approach
Creators: name: Perko, Janez
name: Ukrainczyk, Neven
name: Šavija, Branko
name: Phung, Quoc Tri
name: Koenders, Eddie A. B.
Publisher: name: MDPI
Year: 2024

description: A coupled numerical approach is used to evaluate the influence of pore connectivity and microcracks on leaching kinetics in fully saturated cement paste. The unique advantage of the numerical model is the ability to construct and evaluate a material with controlled properties, which is very difficult under experimental conditions. Our analysis is based on two virtual microstructures, which are different in terms of pore connectivity but the same in terms of porosity and the amount of solid phases. Numerical fracturing was performed on these microstructures. The non-fractured and fractured microstructures were both subjected to chemical leaching. Results show that despite very different material physical properties, for example, pore connectivity and effective diffusivity, the leaching kinetics remain the same as long as the amount of soluble phases, i.e., buffering capacity, is the same. The leaching kinetics also remains the same in the presence of microcracks.
Longitudinal spin fluctuations in bcc and liquid Fe at high temperature and pressure calculated with a supercell approach
Creators: name: Gambino, Davide
name: Brännvall, Marian Arale
name: Ehn, Amanda
name: Hedström, Ylva
name: Alling, Björn
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Investigation of magnetic materials at realistic conditions with first-principles methods is a challenging task due to the interplay of vibrational and magnetic degrees of freedom. The most difficult contribution to include in simulations is represented by the longitudinal magnetic degrees of freedom (LSF) due to their inherent many-body nature; nonetheless, schemes that enable to take into account this effect on a semiclassical level have been proposed and employed in the investigation of magnetic systems. However, assessment of the effect of vibrations on LSF is lacking in the literature. For this reason, in this work we develop a supercell approach within the framework of constrained density functional theory to calculate self-consistently the size of local-environment-dependent magnetic moments in the paramagnetic, high-temperature state in presence of lattice vibrations and for liquid Fe in different conditions. First, we consider the case of bcc Fe at the Curie temperature and ambient pressure. Then, we perform a similar analysis on bcc Fe at Earth's inner core conditions, and we find that LSF stabilize non-zero moments which affect atomic forces and electronic density of states of the system. Finally, we employ the present scheme on liquid Fe at the melting point at ambient pressure, and at Earth's outer core conditions ($p \approx 200$ GPa, $T \approx 6000$ K). In both cases, we obtain local magnetic moments of sizes comparable to the solid-state counterparts.
description: 12 pages, 12 figures
Between Estimates of the Environmental Kuznets Curve
Creators: name: Stern, David I.
name: Stern, David I.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: Research Methods/ Statistical Methods
subject: carbon
subject: sulfur
subject: environmental Kuznets curve
subject: between estimator

description: A recent paper in the Journal of Environmental Economics and Management points out that time effects are not uniquely identified in reduced-form models, such as the environmental Kuznets curve. This Research Report proposes a solution that assumes the time effect is common to each pair of most similar countries. The between estimator makes no a priori assumption about the nature of the time-effects and is likely to provide consistent estimates of long-run relationships in real-world data situations. This research applies several common panel data estimators to the data set for carbon and sulfur emissions in the OECD collected by Vollebergh et al. and the global sulfur dataset compiled by Stern and Common The between estimates of the sulfur-income elasticity are 0.732 in the OECD and 1.157 in the global data set. The estimated carbon-income elasticity is 1.612.
description: Acknowledgements: Elbert Dijkgraaf for providing the data used in their paper.
YANGI O'ZBEKISTONNING – YANGI KONSTITUTSIYASI TA'LIM TIZIMIGA YANGICHA YONDASHUVNING HUQUQIY ASOSIDIR.
Creators: name: Jabborova, Nargiza
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada yurtimizda amalga oshirilgan Konstitutsion islohotlar, shu jumladan ta’lim tizimiga bo‘lgan yangicha yondashuv xususida so‘z yuritiladi. Ta’lim sohasidagi jiddiy muammolardan biri sanalgan o‘quvchilarning tarbiyasi, bu borada ota-onalarning mas’uliyatsizligi, o‘quvchi dunyoqarashiga ta’sir qiluvchi vositalar, ulardan foydalanishda xorij tajribasi to‘g‘risida fikrlar keltirilgan. Shu bilan birga ta’lim va tarbiyaning mushtarakligini ta’minlashda oilaning alohida ahamiyatga ega ekanligi, bu bizning qon-qonimizga singgan sharqona dunyoqarashning bir bo‘lagi ekanligi ta’kidlab o‘tiladi.