cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Tensor RG approach to high-temperature fixed point
Creators: name: Kennedy, Tom
name: Rychkov, Slava
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 82B28 (Primary) 82B27, 82B20 (Secondary)

description: We study a renormalization group (RG) map for tensor networks that include two-dimensional lattice spin systems such as the Ising model. Numerical studies of such RG maps have been quite successful at reproducing the known critical behavior. In those numerical studies the RG map must be truncated to keep the dimension of the legs of the tensors bounded. Our tensors act on an infinite-dimensional Hilbert space, and our RG map does not involve any truncations. Our RG map has a trivial fixed point which represents the high-temperature fixed point. We prove that if we start with a tensor that is close to this fixed point tensor, then the iterates of the RG map converge in the Hilbert-Schmidt norm to the fixed point tensor. It is important to emphasize that this statement is not true for the simplest tensor network RG map in which one simply contracts four copies of the tensor to define the renormalized tensor. The linearization of this simple RG map about the fixed point is not a contraction due to the presence of so-called CDL tensors. Our work provides a first step towards the important problem of the rigorous study of RG maps for tensor networks in a neighborhood of the critical point.
description: version 2: The exposition of the proof of proposition 2.3 has been expanded. version 3 (this version): A minor error in the first paragraph of the proof of Lemma 2.1 has been corrected and figure 2.55 has been replaced as part of this correction
The $χ$-Ramsey problem for triangle-free graphs
Creators: name: Davies, Ewan
name: Illingworth, Freddie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15, 05C35 (Primary) 05D10 (Secondary)

description: In 1967, Erdős asked for the greatest chromatic number, $f(n)$, amongst all $n$-vertex, triangle-free graphs. An observation of Erdős and Hajnal together with Shearer's classical upper bound for the off-diagonal Ramsey number $R(3, t)$ shows that $f(n)$ is at most $(2 \sqrt{2} + o(1)) \sqrt{n/\log n}$. We improve this bound by a factor $\sqrt{2}$, as well as obtaining an analogous bound on the list chromatic number which is tight up to a constant factor. A bound in terms of the number of edges that is similarly tight follows, and these results confirm a conjecture of Cames van Batenburg, de Joannis de Verclos, Kang, and Pirot.
description: 13 pages. This version contains minor revisions and a bound in terms of genus that follows from our main results
Robust direct acoustic impedance control using two microphones for mixed feedforward-feedback controller
Creators: name: Volery, Maxime
name: Guo, Xinxin
name: Lissek, Hervé
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents an acoustic impedance control architecture for an electroacoustic absorber combining both a feedforward and a feedback microphone-based strategies on a current-driven loudspeaker. Feedforward systems enable good performance for direct impedance control. However, inaccuracies in the required actuator model can lead to a loss of passivity, which can cause unstable behaviors. The feedback contribution allows the absorber to better handle model errors and still achieve an accurate impedance, preserving passivity. Numerical and experimental studies were conducted to compare this new architecture against a state-of-the-art feedforward control method.
The skein algebra of the Borromean rings complement
Creators: name: Miura, Go
name: Suzuki, Sakie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57K31

description: The skein algebra of an oriented $3$-manifold is a classical limit of the Kauffman bracket skein module and gives the coordinate ring of the $SL_2(\mathbb{C})$-character variety. In this paper we determine the quotient of a polynomial ring which is isomorphic to the skein algebra of a group with three generators and two relators. As an application, we give an explicit formula for the skein algebra of the Borromean rings complement in $S^3$.
description: 22 pages, 1 figure
Hydrogenated ITO and its Properties
Creators: name: Rein, M.H.
name: Mayandi, J.
name: Olaisen, B.R.
name: Holt, A.
name: Monakhov, E.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2746-2749
description: ITO sputtered by an industrial designed dc magnetron sputtering system has been studied as a TCO for solar
cell application. The ITO was deposited onto substrates of corning glass in argon-hydrogen gas mixtures at different
hydrogen flow rates. The sputtering was performed with a substrate temperature below 75 °C. The influence of the hydrogen
content in the sputtering plasma and the effect of annealing at 300 °C for 15 min in air after sputtering have been studied.
The highest transmittance (81.1%) and lowest resistivity (9.7 x 10-4 Ω cm) of the as-deposited films was achieved when
hydrogen was not introduced into the sputtering chamber. This sample also showed the highest transmittance (above 90%)
and lowest resistivity (2.3 x 10-4 Ω cm) after annealing.
title: African Caribbean Pupils and Art Education
Creators: name: Dash, Paul
Publisher: name: Goldsmiths, University of London
Year: 2008

description: This work looks at the implications for teaching art and design to children of African Caribbean heritage in the British educational system. It is organised in three sections. The first provides the broad rationale for the thesis and includes an analysis of viewpoints on the diasporic state, this instead of a literature review. It asserts that children of African Caribbean and wider diasporic backgrounds are disadvantaged by not being made familiar with material from their cultural heritages. This has come about, I argue, by the enduring effects of the rupture that was the slave trade and the lack of acknowledgement of the significance of the black presence in the West. Consequently, the study contends, diasporic peoples are rendered invisible. The thesis asserts that culture as a context for teaching is fundamental to art and design education. Therefore African Caribbean learners, whose cultural heritages are not seen, are disadvantaged and appear culturally impoverished relative to· others. To substantiate this critical viewpoint, key texts by theorists on diasporic studies are referenced and analysed. These include David Dabydeen, CLR James, Stuart Hall and Kamau Brathwaite. My intention in this first section, therefore, is to throw light on the tensions surrounding the black subject, their lack of a positive presence in the critical and contextual material that children are exposed to and how this tension impacts on the teaching of art. The values disseminated in such pedagogies are central to the enquiry. Section two is dedicated to the presentation of the research findings. Six London-based art and design educationalists that work in environments with high numbers of African Caribbean students are interviewed about the undergirding rationale that drives their work. Four of the educationalists are black. This number of black teachers was selected in the expectation that they would have a particularly high commitment to black children's learning, and as such would have experimented with pedagogies that take account of their learning needs. The outcomes are, however, at times very different from what I had anticipated. This element of surprise is fundamental to the research and the analysis of the meanings embedded in such unexpected material is critical to it. One group of six African Caribbean young people from south London was also interviewed. This interview provided an opportunity to garner information from African Caribbean learners on their experience of state education. The short interview with them furnished critical viewpoints that throw light on young people's perceptions of teaching and learning in London schools. The third section presents a theoretical analysis of key points emerging from the data that could have a bearing on African Caribbean student learning in art and design. Finally, the concluding chapter reflects on the findings in the thesis and provides a pointer to their significance for teachers and school pupils.
Communicating extraterrestrial intelligence (CETI) interaction models based on the Drake Equation
Creators: name: Smith, Reginald D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The Drake Equation has proven fertile ground for speculation about the abundance, or lack thereof, of communicating extraterrestrial intelligences (CETIs) for decades. It has been augmented by subsequent authors to include random variables in order to understand its probabilistic behavior. However, in most cases, the emergence and lifetime of CETIs are assumed to be independent of each other. In this paper, we will derive several expressions that can demonstrate how CETIs may relate to each other in technological age as well as how the dynamics of the concurrent CETI population change under basic models of interaction, such as the Allee Effect. By defining interaction as the change in the expected communication lifetime with respect to the density of CETI in a region of space, we can use models and simulation to understand how the CETI density can promote or inhibit the longevity and overall population of interstellar technological civilizations.
description: 12 pages, 3 figures
Large Area Thin Film Silicon Solar Cells and Modules on Textured ZnO:Al Front Contacts
Creators: name: Obermeyer, P.
name: Repmann, T.
name: Severin, D.
name: Vermeir, I.
name: Schmidt, U.I.
name: Witting, K.
name: Schroeder, J.
name: Müller, J.
name: Kuhrau, N.
name: Kress, M.
name: Schwanitz, K.
name: Klein, S.
name: Wieder, S.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2313-2316
description: Applied Materials is developing the next generation of large-area, low-cost silicon thin-film
photovoltaics technology. An important element of this program is the development of high-quality transparent
conductive coatings. We report here on highly conductive and transparent aluminium-doped zinc oxide (ZnO:Al)
films on large area (1.43 m2, Gen5) glass substrates. The films were deposited by magnetron sputtering of ZnO:Al
layers from rotatable ceramic ZnO:Al2O3-targets at substrate temperatures above 250°C. Sputtered coatings were wetchemically
etched in diluted hydrochloric acid and used as front contacts in amorphous-microcrystalline silicon
(a-Si/μc-Si) tandem junction solar cells and modules. The etching process is crucial for the surface texture of the
front contact. The etch-time was varied and the influence on the surface texture was analyzed. The impact of this
variation on solar cell performance was examined, and the improvement of the light-trapping effect is shown. We
prepared a-Si/μc-Si tandem junction (TJ) modules on different types of etched films. Initial powers up to 146 W for
TJ Gen 5 (1.43 m²) solar modules were achieved. These values correspond to total area efficiencies before light
soaking of 10.2 %.
On the critical exponent and sharp lifespan estimates for semilinear damped wave equations with data from Sobolev spaces of negative order
Creators: name: Chen, Wenhui
name: Reissig, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study semilinear damped wave equations with power nonlinearity $|u|^p$ and initial data belonging to Sobolev spaces of negative order $\dot{H}^{-γ}$. In the present paper, we obtain a new critical exponent $p=p_{\mathrm{crit}}(n,γ):=1+\frac{4}{n+2γ}$ for some $γ\in(0,\frac{n}{2})$ and low dimensions in the framework of Soblev spaces of negative order. Precisely, global (in time) existence of small data Sobolev solutions of lower regularity is proved for $p>p_{\mathrm{crit}}(n,γ)$, and blow-up of weak solutions in finite time even for small data if $1
Certification of Genuine Multipartite Entanglement with General and Robust Device-independent Witnesses
Creators: name: Zhang, Chao
name: Zhang, Wen-Hao
name: Sekatski, Pavel
name: Bancal, Jean-Daniel
name: Zwerger, Michael
name: Yin, Peng
name: Li, Gong-Chu
name: Peng, Xing-Xiang
name: Chen, Lei
name: Han, Yong-Jian
name: Xu, Jin-Shi
name: Huang, Yun-Feng
name: Chen, Geng
name: Li, Chuan-Feng
name: Guo, Guang-Can
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Genuine multipartite entanglement represents the strongest type of entanglement, which is an essential resource for quantum information processing. Standard methods to detect genuine multipartite entanglement, e.g., entanglement witnesses, state tomography, or quantum state verification, require full knowledge of the Hilbert space dimension and precise calibration of measurement devices, which are usually difficult to acquire in an experiment. The most radical way to overcome these problems is to detect entanglement solely based on the Bell-like correlations of measurement outcomes collected in the experiment, namely, device-independently (DI). However, it is difficult to certify genuine entanglement of practical multipartite states in this way, and even more difficult to quantify it, due to the difficulty to identify optimal multipartite Bell inequalities and protocols tolerant to state impurity. In this work, we explore a general and robust DI method which can be applied to various realistic multipartite quantum state in arbitrary finite dimension, while merely relying on bipartite Bell inequalities. Our method allows us both to certify the presence of genuine multipartite entanglement and to quantify it. Several important classes of entangled states are tested with this method, leading to the detection of genuinely entangled states. We also certify genuine multipartite entanglement in weakly-entangled GHZ states, thus showing that the method applies equally well to less standard states.
Artificial intelligence for online characterization of ultrashort X-ray free-electron laser pulses
Creators: name: Dingel, Kristina
name: Otto, Thorsten
name: Marder, Lutz
name: Funke, Lars
name: Held, Arne
name: Savio, Sara
name: Hans, Andreas
name: Hartmann, Gregor
name: Meier, David
name: Viefhaus, Jens
name: Sick, Bernhard
name: Ehresmann, Arno
name: Ilchen, Markus
name: Helml, Wolfram
Publisher: name: arXiv
Year: 2021
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Artificial Intelligence (cs.AI)
subject: Accelerator Physics (physics.acc-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: X-ray free-electron lasers (XFELs) as the world's brightest light sources provide ultrashort X-ray pulses with a duration typically in the order of femtoseconds. Recently, they have approached and entered the attosecond regime, which holds new promises for single-molecule imaging and studying nonlinear and ultrafast phenomena such as localized electron dynamics. The technological evolution of XFELs toward well-controllable light sources for precise metrology of ultrafast processes has been, however, hampered by the diagnostic capabilities for characterizing X-ray pulses at the attosecond frontier. In this regard, the spectroscopic technique of photoelectron angular streaking has successfully proven how to non-destructively retrieve the exact time-energy structure of XFEL pulses on a single-shot basis. By using artificial intelligence techniques, in particular convolutional neural networks, we here show how this technique can be leveraged from its proof-of-principle stage toward routine diagnostics even at high-repetition-rate XFELs, thus enhancing and refining their scientific accessibility in all related disciplines.
description: This version includes Supplementary Information
Ergodic Decompositions of Dirichlet Forms under Order Isomorphisms
Creators: name: Schiavo, Lorenzo Dello
name: Wirth, Melchior
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 31C25

description: We study ergodic decompositions of Dirichlet spaces under intertwining via unitary order isomorphisms. We show that the ergodic decomposition of a quasi-regular Dirichlet space is unique up to a unique isomorphism of the indexing space. Furthermore, every unitary order isomorphism intertwining two quasi-regular Dirichlet spaces is decomposable over their ergodic decompositions up to conjugation via an isomorphism of the corresponding indexing spaces.
description: 16 pages. To appear in J. Evol. Equ. arXiv admin note: text overlap with arXiv:2003.01366
Вестник научной мысли,Выпуск 2 2020
Creators: name: Дагестанский территориальный институт профессиональных бухгалтеров
Publisher: name: Дагестанский территориальный институт профессиональных бухгалтеров
Year: 2020

description: Вестник научной мысли,Выпуск 2 2020
Stability and Performance of Dye Solar Cells under Reverse and Forward Bias: Dark Lock-In Thermography (DLIT) Analysis
Creators: name: Mastroianni, S.
name: D’Ercole, D.
name: Lanuti, A.
name: Reale, A.
name: Brown, T.M.
name: Di Carlo, A.
name: Bärenklau, M.
name: Hoppe, H.
Publisher: name: WIP
Year: 2011
Subjects: Advanced Photovoltaics : New Concepts and Ultra-High Efficiency
Organic-based PV

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 608-612
description: The upscaling of Dye Solar Cells (DSCs) requires series and parallel connection of cells in a module in
order to reach the desired output voltage and power. Modules can have different performance and thus leading to
mismatch. This phenomenon causes some cells to work under reverse or forward bias and to dissipate power rather
than generating it. High positive or negative voltages and prolonged stress cause degradation of performance, gas
formation inside the cell and cell failure.
In this work Dark Lock-in Thermography (DLIT) were performed on DSCs in order to evaluate if this phenomenon is
caused by a thermal effect. Different bias voltages, both negative and positive, were applied to determine cell stability
and to detect degraded areas within the active area of the cell.
New faunistic and biological records on Coleophoridae from the Balkans (Lepidoptera)
Creators: name: Fazekas, Imre
Publisher: name: Zenodo
Year: 2025

description: The paper deals with new records on the geographical distribution of 40 species of Coleophoridae in thekan area. Coleophora felixella Baldizzone, 1994 and C. goluensis Baldizzone, 1994 are new for the European fauna.The host plant and the larval case of. C. daglarica Baldizzone & Tabell, 1999 are presented for the first time.
Developed Matrix inequalities via Positive Multilinear Mappings
Creators: name: Dehghani, Mahdi
name: Kian, Mohsen
name: Seo, Yuki
Publisher: name: arXiv
Year: 2015
Subjects: subject: Functional Analysis (math.FA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 15A69, 47A63, 47A64, 47A56

description: Utilizing the notion of positive multilinear mappings, we give some matrix inequalities. In particular, Choi--Davis--Jensen and Kantorovich type inequalities including positive multilinear mappings are presented.
Energy Yield Measurements at SUPSI – Importance of Data Quality Control and Its Influence on kWh/Wp Inter-Comparison
Creators: name: Dittmann, S.
name: Friesen, G.
name: Strepparava, D.
name: Meoli, R.
name: Domine, D.
name: Burà, E.
name: Chianese, D.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
PV Modules

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3629-3634
description: The Institute for Applied Sustainability to the Built Environment (ISAAC) of the University of Applied Sciences and Arts of Southern Switzerland (SUPSI) has over twenty years of experience in the field of PV module testing. Single PV modules are tested outdoor and indoor with the aim to assess their quality and reliability in terms of power, energy output and stability. To achieve a high accuracy in delivered results, improved data quality control and new data analysis features have been implemented at SUPSI over the last years. The outdoor measurements are carried out with Maximum-Power-Point-Tracker’s (MPPT3000), whereas all indoor measurements with a class A+ solar simulator. The MPPT3000 system allows customized measurements of all module I-V parameters as well as module and ambient temperatures and irradiance. All data undergoes an automatic quality control, which facilitates data analysis and improves energy yield comparisons. This contribution reports on the implementation of these quality control activities. The paper will focus on the detection of errors like e.g. shading, missing data, MPPT tracking problems and drift of sensors and their influence on the final performance ratio and kWh/Wp inter-comparison.
Topological Superconductivity in Metal/Quantum-Spin-Ice Heterostructures
Creators: name: She, Jian-Huang
name: Kim, Choong H.
name: Fennie, Craig J.
name: Lawler, Michael J.
name: Kim, Eun-Ah
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The original proposal to achieve superconductivity by starting from a quantum spin-liquid (QSL) and doping it with charge carriers, as proposed by Anderson in 1987, has yet to be realized. Here we propose an alternative strategy: use a QSL as a substrate for heterostructure growth of metallic films to design exotic superconductors. By spatially separating the two key ingredients of superconductivity, i.e., charge carriers (metal) and pairing interaction (QSL), the proposed setup naturally lands on the parameter regime conducive to a controlled theoretical prediction. Moreover, the proposed setup allows us to "customize" electron-electron interaction imprinted on the metallic layer. The QSL material of our choice is quantum spin ice well-known for its emergent gauge-field description of spin frustration. Assuming the metallic layer forms an isotropic single Fermi pocket, we predict that the coupling between the emergent gauge-field and the electrons of the metallic layer will drive topological odd-parity pairing. We further present guiding principles for materializing the suitable heterostructure using ab initio calculations and describe the band structure we predict for the case of Y$_2$Sn$_{2-x}$Sb$_x$O$_7$ grown on the (111) surface of Pr$_2$Zr$_2$O$_7$. Using this microscopic information, we predict topological odd-parity superconductivity at a few Kelvin in this heterostructure, which is comparable to the $T_c$ of the only other confirmed odd-parity superconductor Sr$_2$RuO$_4$.
description: 13 papers, 3 figures + 30 pages of supplemental material
Thalia sibogae Van Soest 1973
Creators: name: Karunarathne, Krishan D.
name: Croos, M. D. S. T. De
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Thaliacea
Salpida
Salpidae
Thalia
Thalia sibogae

description: Thalia sibogae Van Soest, 1973
Thalia sibogae Van Soest 1973: 204, 205, Fig. 8; 1998: 235, Table 14.1. Kim et al. 2011: 147, Fig. 5. Purushothaman et al. 2017. Ishak et al. 2018: 454, 459–465, Figs. 4a–e, 5.
Material examined. One solitary zooid (MDAFWU 2018 /85), St.133, January 2018 (Fig. 2D–F).
Description. Solitary zooid: Transparent body bulky rounded with a very thick, smooth test, with two long (about one third of body length), tapering processes on the posterior end (Fig. 2D–F); length without processes 7 mm. Atrial palps fairly small and bifurcate (Fig. 2F); lateral projections very small, simple and not bifurcated (Fig. 2D, F); medioventral projections are small and of unequal length, the anterior ones are the smallest (Fig. 2E). Six body muscles broad; M I narrowly interrupted dorsally, M II–IV converged mid-dorsally, M V and M VI near but do not touch dorsally; M II–V in complete rings, M VI interrupted ventrally (Fig. 2D). Totally (M I–VI) 60 muscle fibers. The nucleus (stomach + intestine) is close to the middle posterior projection (Fig. 2D–F).
Aggregate zooid: Not collected.
Global distribution. The Central Indo-Pacific (Van Soest 1973, 1998; van der Land 2008); Korean waters (Kim et al. 2011); the east coast of Peninsular Malaysia (Ishak et al. 2018). Type locality: Pulu Sanguisapio, Tawi-Tawi Island, Sulu archipelago (Siboga -Expedition St. 93, 05°N, 120°E).
Remarks. Although Van Soest (1973) did not observe lateral projections on the type material of T. sibogae, tiny lateral projections may exist with solitary zooids of T. sibogae according to Kim et al. (2011) and Ishak et al. (2018). Therefore, the Sri Lankan specimen resembles the specimens of Kim et al. (2011) and Ishak et al. (2018). The total number of muscle fibres (M I–VI) in solitary zooids of Thalia democratica (Forskål, 1775) shows a clinal variation, decreasing from higher to lower latitudes (Van Soest 1975b); and there is a possibility to be such a variation in T. sibogae, but data is not enough in the literature for comparison.
Local name: Indi Gaduwa (in Sinhalese) [note: usually fishers use this term for tiny salps, while the Pegea -like larger salps are called ‘ Rata-indi Gadu ’ in Sinhalese and ‘ Pereechcham Katti ’ in Tamil].
Local importance: None [but, Pegea -like larger salps regularly clog into fishing nets (authors’ observations)].
description: Published as part of Karunarathne, Krishan D. & Croos, M. D. S. T. De, 2021, Pelagic tunicates (Appendicularia and Thaliacea) of Sri Lanka: two first records with an annotated checklist, pp. 352-376 in Zootaxa 5067 (3) on pages 358-360, DOI: 10.11646/zootaxa.5067.3.2, http://zenodo.org/record/5681899
Separation Framework: An Enabler for Cooperative and D2D Communication for Future 5G Networks
Creators: name: Mustafa, Hafiz Attaul
name: Imran, Muhammad Ali
name: Shakir, Muhammad Zeeshan
name: Imran, Ali
name: Tafazolli, Rahim
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Soaring capacity and coverage demands dictate that future cellular networks need to soon migrate towards ultra-dense networks. However, network densification comes with a host of challenges that include compromised energy efficiency, complex interference management, cumbersome mobility management, burdensome signaling overheads and higher backhaul costs. Interestingly, most of the problems, that beleaguer network densification, stem from legacy networks' one common feature i.e., tight coupling between the control and data planes regardless of their degree of heterogeneity and cell density. Consequently, in wake of 5G, control and data planes separation architecture (SARC) has recently been conceived as a promising paradigm that has potential to address most of aforementioned challenges. In this article, we review various proposals that have been presented in literature so far to enable SARC. More specifically, we analyze how and to what degree various SARC proposals address the four main challenges in network densification namely: energy efficiency, system level capacity maximization, interference management and mobility management. We then focus on two salient features of future cellular networks that have not yet been adapted in legacy networks at wide scale and thus remain a hallmark of 5G, i.e., coordinated multipoint (CoMP), and device-to-device (D2D) communications. After providing necessary background on CoMP and D2D, we analyze how SARC can particularly act as a major enabler for CoMP and D2D in context of 5G. This article thus serves as both a tutorial as well as an up to date survey on SARC, CoMP and D2D. Most importantly, the article provides an extensive outlook of challenges and opportunities that lie at the crossroads of these three mutually entangled emerging technologies.
description: 28 pages, 11 figures, IEEE Communications Surveys & Tutorials 2015
Thermal Aspects of Sphelar® Modules in Different Building Integration Mode
Creators: name: Boddaert, S.
name: Pincemin, S.
name: Taira, K.
name: Nakata, J.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
PV Modules

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3646-3651
description: Many research projects focuses on new photovoltaic components allowing a large integration in building.
Whereas silicon wafer shape allows only a limited range of integration solutions due to flatness of glass cover. Small size
of Sphelar® cells and flexibility in construction of modules offered a large range of integration mode, both as component
coverage of facade or glazed element. Many studies demonstrate the advantages of this technology in term of daily or
annual electricity production compared with conventional photovoltaic modules. In this experimental study, we explore
many roofing integration solutions using different material layer directly below Sphelar® module in order to simulate
thermal stress and to assess impact on electricity production. All studied cases represent possible building integration conditions.
High-Rate Deposited Amorphous and Microcrystalline Silicon Based Tandem Cells and Modules
Creators: name: Kilper, T.
name: Hrunski, D.
name: Kirchhoff, J.
name: Kroll, J.
name: Muthmann, S.
name: Noll, J.
name: Reetz, W.
name: Schicho, S.
name: Schöpe, G.
name: Zahren, C.
name: Gordijn, A.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2320-2323
description: Tandem thin-film solar cells based on amorphous (a-Si:H) and microcrystalline silicon (μc-Si:H) were
prepared in a 30×30 cm² PECVD reactor. Applying 40.68 MHz μc-Si:H high-rate processes at 10 Å/s for bottom
i-layer deposition initial tandem cell efficiencies up to 11.5 % were realized. In combination with a 40.68 MHz
a-Si:H rate process for top i-layer deposition at 5 Å/s initial tandem cell efficiencies up to 11.0/10.7 % (50/32 min
total i-layer deposition time on SnO2:F/ZnO:Al as front TCO) were achieved. A first tandem module with bottom
i-layer deposition at 10 Å/s had an initial efficiency of 10.0 % (aperture area 64 cm²). Also the stability properties of
high-rate deposited 40.68 MHz μc-Si:H solar cells (RD = 10-25 Å/s) were investigated. Particularly samples that
were deposited at 10 Å/s showed an excellent stability. After 4 years storage in ambient atmosphere and 1000 h light
soaking the cell efficiency was 9.0 % corresponding with a relative degradation of only 1.9 % compared to the initial
cell efficiency.
Impacts Beyond Penal Population: Mass Incarceration and Trust in the Criminal Justice System (Supplementary Materials)
Creators: name: González, Javiera Carvajal
name: Chávez, Liliana Manzano
name: García, Daniel Fredes
name: Campos, Felipe Cortés
Publisher: name: Open Science Framework
Year: 2023

description: A preprint and its supplementary materials
UV Accelerated Test Based on Analysis of Field Exposed PV Modules
Creators: name: Shioda, T.
name: Maruko, N.
name: Suzuki, A.
name: Nishihara, K.
name: Zenkoh, H.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
PV Modules

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3665-3668
description: We proposed an UV accelerated test condition for an EVA encapsulant, based on analysis of long term
field exposed PV modules. We found that strong UV irradiation into EVA encapsulant test sample led to the fast
decomposition of UV absorber formulated in EVA encapsulant, which has never seen in the field exposed PV
modules. Thus, the integrating UV intensity of 60 W/m2 and black panel temperature of 110OC using a xenon
weather-o-meter were suitable as an UV accelerated test condition. With this proposed test condition, which shows that 1 week exposure by xenon light corresponds to 1 year field exposure, we can predict discoloration rate of EVA encapsulant. In addition, we evaluated change in peel strength to glass for Mitsui’s and the other commercially available EVA encapsulants during UV accelerated test with the proposed condition. There was no large change in peel strength for our EVA encapsulant during the UV accelerated test. On the other hand, we observed that the competitor’s EVA encapsulant showed the large decrease of peel strength to glass at early stage, even no change in yellowness index (YI). This result indicates not only YI change but also peel strength change should be evaluated for design of reliable PV module and encapsulant.
The inner structure of the TW Hya Disk as revealed in scattered light
Creators: name: Debes, J. H.
name: Jang-Condell, H.
name: Schneider, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We observe a significant change in the TW Hya disk interior to 40~AU via archival unpolarized multi-wavelength Hubble Space Telescope/STIS and NICMOS images with an inner working angle (IWA) of 0\farcs4 (22~AU). Our images show the outer edge of a clearing at every wavelength with similar behavior, demonstrating that the feature is structural, rather than due to some property of polarized light in the disk. We compare our observations to those taken by Akiyama et al. (2015) and Rapson et al. (2015), and discuss the spectral evolution of the disk interior to 80~AU. We construct a model with two gaps: one at 30~AU and one at 80~AU that fit the observed surface brightness profile but overpredicts the absolute brightness of the disk. Our models require an additional dimming to be consistent with observations, which we tentatively ascribe to shadowing. The gap structures seen in scattered light are spatially coincident with sub-mm detections of CO and N$_2$H$^+$, and are near expected condensation fronts of these molecular species, providing tentative evidence that the structures seen in scattered light may be correlated with chemical changes in the disk.
description: 13 pages, 3 figures, accepted to ApJ Letters
Unimodular Trees versus Einstein Trees
Creators: name: Alvarez, Enrique
name: Gonzalez-Martin, Sergio
name: Martin, Carmelo P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The maximally helicity violating (MHV) tree level scattering amplitudes involving three, four or five gravitons are worked out in Unimodular Gravity. They are found to coincide with the corresponding amplitudes in General Relativity. This a remarkable result, insofar as both the propagators and the vertices are quite different in both theories.
description: 20 pages, 5 figures
Valence state determines the band magnetocrystalline anisotropy in 2D rare-earth/noble-metal compounds
Creators: name: Blanco-Rey, M.
name: Castrillo-Bodero, R.
name: Ali, K.
name: Gargiani, P.
name: Bertran, F.
name: Sheverdyaeva, P. M.
name: Ortega, J. E.
name: Fernandez, L.
name: Schiller, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In intermetallic compounds with zero-orbital momentum ($L=0$) the magnetic anisotropy and the electronic band structure are interconnected. Here, we investigate this connection on divalent Eu and trivalent Gd intermetallic compounds. We find by X-ray magnetic circular dichroism an out-of-plane easy magetization axis in 2D atom-thick EuAu$_2$. Angle-resolved photoemission and density-functional theory prove that this is due to strong $f-d$ band hybridization and Eu$^{2+}$ valence. In contrast, the easy in-plane magnetization of the structurally-equivalent GdAu$_2$ is ruled by spin-orbit-split $d$-bands, notably Weyl nodal lines, occupied in the Gd$^{3+}$ state. Regardless of the $L$ value, we predict a similar itinerant electron contribution to the anisotropy of analogous compounds.
description: 9 pages, 4 figures; Supplemental Material 10 pages, 9 figures
Optical Efficiency of “PhoCUS” C-Module Concentrators
Creators: name: Parretta, A.
name: Aldegheri, F.
name: Roncati, D.
name: Cancro, C.
name: Fucci, R.
Publisher: name: WIP
Year: 2011
Subjects: Advanced Photovoltaics : New Concepts and Ultra-High Efficiency
Terrestrial Concentrator Systems

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 658-663
description: The light collection properties of PhoCUS C-Module concentration units have been investigated by
realizing a rugged “Mock-up” containing the primary refractive optics, a secondary optical element (SOE) and a
receiver. Primary optics were PMMA refractive elements manufactured by a molding injection process. The
secondary optical element was used to minimize the optical losses due to module assembly and tracking inaccuracies.
To investigate the collection efficiency of only the optical unit, excluding the concentration solar cell, the receiver
was realized by an integrating sphere equipped with a photodetector, able to collect, without losses, all the radiation
reaching the receiver area. To investigate the optical efficiency of the whole C-Module concentration unit, a
concentration silicon cell, previously tested in the PhoCUS C-Modules, was used as receiver. Two methods were
applied for the optical measurements, the conventional “direct” method using a parallel beam with solar divergence to
irradiate the front side of concentrator, and the “inverse” method using a lambertian source applied in place of the
concentrating cell in order to irradiate the concentrator in the reverse way.
High Efficieny N-Type Silicon Solar Cells with Novel Diffusion Technique for Emitter Formation
Creators: name: Veschetti, Y.
name: Sanzone, V.
name: Diagne, F.
name: Auriac, N.
name: Heslinga, D.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 2241-2244
description: The development of a fabrication process on n-type silicon solar cells requires the use of boron
diffusion for the emitter formation. Many diffusion techniques are generally used at laboratory scale but it is yet not
clear whether if one of them is suitable for production. This study aims at investigating the potential of BCl3 diffusion
as an alternative technique for the fabrication of n-type solar cells. Excellent doping uniformities (< 3%) were
achieved on 125PSQ wafer area and along the tube furnace. The evolution of the diffused emitter profile was
analysed along the cell fabrication process. The thermal oxidation step used for the emitter passivation induces a
large redistribution of the profile and a reduction of surface concentration. Nevertheless, the low surface
concentration was not an issue for contacting boron emitter with screen-printing paste. Emitter saturation density was
measured on textured SiO2/SiN passivated surfaces, depending on the diffusion temperature and oxidation time. The
best reached J0 value was 90 fA/cm² at a diffusion temperature of 925°C. Finally, solar cells were fabricated on large
area FZ wafers. Recent improvement in front screen-printed metallization lead to the achievement of efficiencies
above 18.0% on 125PSQ FZ substrates with a record efficiency of 18.4%. Using an optimized front passivation
stack, efficiency of 19% should be soon obtained.
Generation of a North/South Magnetic Field Component from Variations in the Photospheric Magnetic Field
Creators: name: Ulrich, Roger K.
name: Tran, Tham
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We address the problem of calculating the transverse magnetic field in the solar wind outside of the hypothetical sphere called the source surface where the solar wind originates. This calculation must overcome a widely used fundamental assumption about the source surface -- the field is normally required to purely radial at the source surface. Our model rests on the fact that a change in the radial field strength at the source surface is a change in the field line density. Surrounding field lines must move laterally in order to accommodate this field line density change. As the outward wind velocity drags field lines past the source surface this lateral component of motion produces a tilt implying there is a transverse component to the field. An analytic method of calculating the lateral translation speed of the field lines is developed. We apply the technique to an interval of approximately two Carrington rotations at the beginning of 2011 using 2-h averages of data from the Helioseismic Magnetic Imager instrument on the Solar Dynamics Observatory spacecraft. We find that the value of the transverse magnetic field is dominated on a global scale by the effects of high latitude concentrations of field lines being buffetted by supergranular motions.
description: 23 pages with 8 figures. Accepted by Solar Physics (LaTeX processing with aastex6.cls instead of solarphysics.cls due to compatibility issues)
Control Dynamic Modelling for Electrodermal Activity Short-Term Responses
Creators: name: Isiaka, Fatima
name: Adamu, Muhammed Awwal
Publisher: name: International Journal of Human Computer Interaction and Cognitive Modelling
Year: 2023

description: The concept of Electrodermal Activity (EDA) has been set as aconcise measure that reflects the output of an integrated affective andmotivational phenomenon that can occur within the central nervoussystems of a person’s body. The process is also known to be a valuablemechanism in studying behavioural medical concepts as a biomarkerfor an individual mind and traits. It can be set as a characteristicfor subtle emotional responsiveness as part of the index that directsthe examination of stress-interrelated effects on body functioning.Most research focuses on its response output concept and producescontinuous sequential readings of the participants’ nervous states, whichis one of the most important attributes of the EDA measure. Thispaper tries to study its mechanism and methods of data generationby looking at the control dynamics that constitute the process of datageneration and response readings in real time through simulation andmodel design based on a dynamic control system. Phasic changeswere compared for each step in response output. The result showsthat amplitude response scenarios are based on a time limit, andthe reaction rate can be synchronous to a user activity based ona constant time interval for each data generation. A control physiologicalsystem can also be modified and emulated based on this concept.
Spectral and Reflection Effects for Different PV Technologies Based on Ground Measurements and Satellite Data
Creators: name: Kühnert, J.
name: Behrendt, T.
name: Betcke, J.
name: Lorenz, E.
name: Hammer, A.
name: Heinemann, D.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
PV Modules

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3619-3624
description: The spectral distribution of solar irradiance influences the PV modules' performance due to a limited
spectral range of absorption and a high variety of the spectral sensitivity among PV materials. Deviations of the
spectral distribution of irradiance from the AM1.5 spectrum are directly influencing the short circuit current and
therefore the power output. This spectral effect has to be considered in PV yield estimations. To estimate the
influence of the spectral effect for a specific site, ground measurements can be performed, which usually require high
efforts. As an alternative data source, satellite derived spectral irradiance information is available for almost every
region in the world. This paper presents an analysis of the spectral effect , referring to reflection corrected
measurements of the short-circuit current for different PV materials as well as to measurements of the solar spectrum.
The results are compared to satellite derived spectrally resolved irradiance to evaluate and improve yield estimations.
Preparation of SnO2 Thin Films at Low Temperatures by Hot-Wire CVD Method
Creators: name: Natsuhara, H.
name: Ando, S.
name: Kojima, T.
name: Yoshida, N.
name: Nonomura, S.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2707-2710
description: The SnO2 films have been fabricated by Hot-wire CVD method as transparent conducting oxide (TCO)
films used in Si thin film solar cells. The crystallization of SnO2 prepared by Hot-wire CVD method starts at 150 oC.
The selectivity enhancement of solar cell substrate will contribute to reduce the cost of silicon thin film solar cells.
Further, H2 additional effect for crystallization of SnO2 films was investigated. The atomic hydrogen assisted nanocrystallization
exists for the depositions of SnO2 by Hot-wire CVD method. This result indicated that it is impossible
to reduce substrate temperature to crystallize SnO2 films. Furthermore, the addition of H2 gas improved the electrical
conductivity up to 5.3×100 S/cm. However, these effects are limited in the deposition condition of small amount of
hydrogen.
Masses, Radii, and Equation of State of Neutron Stars
Creators: name: Ozel, Feryal
name: Freire, Paulo
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We summarize our current knowledge of neutron star masses and radii. Recent instrumentation and computational advances have resulted in a rapid increase in the discovery rate and precise timing of radio pulsars in binaries in the last few years, leading to a large number of mass measurements. These discoveries show that the neutron star mass distribution is much wider than previously thought, with 3 known pulsars now firmly in the 1.9-2.0 Msun mass range. For radii, large, high quality datasets from X-ray satellites as well as significant progress in theoretical modeling led to considerable progress in the measurements, placing them in the 9.9-11.2 km range and shrinking their uncertainties due to a better understanding of the sources of systematic errors. The combination of the massive neutron star discoveries, the tighter radius measurements, and improved laboratory constraints of the properties of dense matter has already made a substantial impact on our understanding of the composition and bulk properties of cold nuclear matter at densities higher than that of the atomic nucleus, a major unsolved problem in modern physics.
description: To be published in Annual Reviews of Astronomy and Astrophysics 2016. All mass, radius, and equation of state data are available at http://xtreme.as.arizona.edu/NeutronStars