cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sensitivity of ice loss to uncertainty in flow law parameters in an idealized one-dimensional geometry
Creators: name: Zeitz, Maria
name: Levermann, Anders
name: Winkelmann, Ricarda
Publisher: name: Katlenburg-Lindau : Copernicus
Year: 2021
Subjects: subject: 910

description: Acceleration of the flow of ice drives mass losses in both the Antarctic and the Greenland Ice Sheet. The projections of possible future sea-level rise rely on numerical ice-sheet models, which solve the physics of ice flow, melt, and calving. While major advancements have been made by the ice-sheet modeling community in addressing several of the related uncertainties, the flow law, which is at the center of most process-based ice-sheet models, is not in the focus of the current scientific debate. However, recent studies show that the flow law parameters are highly uncertain and might be different from the widely accepted standard values. Here, we use an idealized flow-line setup to investigate how these uncertainties in the flow law translate into uncertainties in flow-driven mass loss. In order to disentangle the effect of future warming on the ice flow from other effects, we perform a suite of experiments with the Parallel Ice Sheet Model (PISM), deliberately excluding changes in the surface mass balance. We find that changes in the flow parameters within the observed range can lead up to a doubling of the flow-driven mass loss within the first centuries of warming, compared to standard parameters. The spread of ice loss due to the uncertainty in flow parameters is on the same order of magnitude as the increase in mass loss due to surface warming. While this study focuses on an idealized flow-line geometry, it is likely that this uncertainty carries over to realistic three-dimensional simulations of Greenland and Antarctica.
Reseñas iberoamericanas
Creators: name: Albuixech, Lourdes
name: Trambaioli, Marcella
name: Gutiérrez Meza, José Elías
name: Dreyer, Antje
name: Sánchez Jiménez, Antonio
name: García, Carlos
name: Galván Moreno, Luis
name: Cano Vidal, Borja
name: Corral, Wilfrido H.
name: Van Hecke, An
name: Gatica Cote, Paulo Antonio
name: Dolle, Verena
name: Mesa Gancedo, Daniel
name: Del Valle Lattanzio, Camilo
name: Wolfenzon, Carolyn
name: Magaña, Leticia A.
name: Viñas, Ángel
name: López De Abiada, José Manuel
name: Vallen, Nino
name: Fischer, Thomas
name: Garrido, Margarita
name: Schulze, Frederik
name: Welge, Jobst
name: Orsolini, Marcio
name: Pattin, Sebastian
name: Mueller, Antony P.
name: Tamayo Rojas, Carolina
name: Rivera Revelo, Laura
name: Strassner, Veit
name: Schmidt, Kerstin
Publisher: name: Ibero-Amerikanisches Institut (Berlin)
Year: 2017

description: IBEROAMERICANA, Vol. 17, Núm. 66: (Septiembre-Diciembre 2017)
Uniformity norms, their weaker versions, and applications
Creators: name: Dodos, Pandelis
name: Kanellopoulos, Vassilis
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We show that, under some mild hypotheses, the Gowers uniformity norms (both in the additive and in the hypergraph setting) are essentially equivalent to certain weaker norms which are easier to understand. We present two applications of this equivalence: a variant of the Koopman--von Neumann decomposition, and a proof of the relative inverse theorem for the Gowers $U^s[N]$-norm using a norm-type pseudorandomness condition.
Teleportation of a qubit using entangled non-orthogonal states: A comparative study
Creators: name: Sisodia, Mitali
name: Verma, Vikram
name: Thapliyal, Kishore
name: Pathak, Anirban
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The effect of non-orthogonality of an entangled non-orthogonal state based quantum channel is investigated in detail in the context of the teleportation of a qubit. Specifically, average fidelity, minimum fidelity and minimum assured fidelity (MASFI) are obtained for teleportation of a single qubit state using all the Bell type entangled non-orthogonal states known as quasi Bell states. Using Horodecki criterion, it is shown that the teleportation scheme obtained by replacing the quantum channel (Bell state) of the usual teleportation scheme by a quasi Bell state is optimal. Further, the performance of various quasi Bell states as teleportation channel is compared in an ideal situation (i.e., in the absence of noise) and under different noise models (e.g., amplitude and phase damping channels). It is observed that the best choice of the quasi Bell state depends on the amount non-orthogonality, both in noisy and noiseless case. A specific quasi Bell state, which was found to be maximally entangled in the ideal conditions, is shown to be less efficient as a teleportation channel compared to other quasi Bell states in particular cases when subjected to noisy channels. It has also been observed that usually the value of average fidelity falls with an increase in the number of qubits exposed to noisy channels (viz., Alice's, Bob's and to be teleported qubits), but the converse may be observed in some particular cases.
description: 14 pages, 4 figures
Quantum sealed-bid auction using a modified scheme for multiparty circular quantum key agreement
Creators: name: Sharma, Rishi Dutt
name: Thapliyal, Kishore
name: Pathak, Anirban
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: A feasible, secure and collusion-attack-free quantum sealed-bid auction protocol is proposed using a modified scheme for multi-party circular quantum key agreement. In the proposed protocol, the set of all ($n$) bidders is grouped in to $l$ subsets (sub-circles) in such a way that only the initiator (who prepares the quantum state to be distributed for a particular round of communication and acts as the receiver in that round) is a member of all the subsets (sub-circles) prepared for a particular round, while any other bidder is part of only a single subset. All $n$ bidders and auctioneer initiate one round of communication, and each of them prepares $l$ copies of a $\left(r-1\right)$-partite entangled state (one for each sub-circle), where $r=\frac{n}{l}+1$. The efficiency and security\textcolor{blue}{{} }of the proposed protocol are critically analyzed. It is shown that the proposed protocol is free from the collusion attacks that are possible on the existing schemes of quantum sealed-bid auction. Further, it is observed that the security against collusion attack increases with the increase in $l$, but that reduces the complexity (number of entangled qubits in each entangled state) of the entangled states to be used and that makes the scheme scalable and implementable with the available technologies. The additional security and scalability is shown to arise due to the use of a circular structure in place of a complete-graph or tree-type structure used earlier.
description: 10 pages, 2 figures
Quantum Conference
Creators: name: Banerjee, Anindita
name: Thapliyal, Kishore
name: Shukla, Chitra
name: Pathak, Anirban
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A notion of quantum conference is introduced in analogy with the usual notion of a conference that happens frequently in today's world. Quantum conference is defined as a multiparty secure communication task that allows each party to communicate their messages simultaneously to all other parties in a secure manner using quantum resources. Two efficient and secure protocols for quantum conference have been proposed. The security and efficiency of the proposed protocols have been analyzed critically. It is shown that the proposed protocols can be realized using a large number of entangled states and group of operators. Further, it is shown that the proposed schemes can be easily reduced to protocol for multiparty quantum key distribution and some earlier proposed schemes of quantum conference, where the notion of quantum conference was different.
description: 12 pages, 1 figure
Sensiava Markhaseva & Schulz, 2006, gen. nov.
Creators: name: Markhaseva, Elena L.
name: Schulz, Knud
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Maxillopoda
Calanoida
Diaixidae
Sensiava

description: Genus Sensiava gen. nov.
Description. Male. Cephalosome and first pedigerous somite and pedigerous somites 4–5 incompletely separated. Rostrum with 2 long filaments. Antennules asymmetrical, right one 23-segmented and geniculate, left 24-segmented. Mouthparts well developed. Praecoxal endite of maxilla with 5 setae; endopod with 8 sensory setae (3 worm-like, 5 brush-like). Praecoxal lobes of maxilliped syncoxa with 1 sclerotized seta on proximal lobe, 2 sclerotized setae on medial lobe and 3 setae (2 sclerotized, 1 poorly sclerotized) on distal lobe, setal formula 1,2,3. Terminal endopodal segment of maxilliped with 4 setae (2 thick and long, about 1.6 times longer than basis). Swimming legs typical of Clausocalanoidea, with P1 endopod 1-segmented, P2 endopod 2-segmented, and P3–P4 endopods 3-segmented. P1–P4 exopods 3-segmented. P1 exopod segment 3 with 3 medial setae, P2–P4 exopod segment 3 with 4 medial setae. P2–P4 endopods with posterior surface spinulated. P2–P3 basis and first and second exopod segments with distal rows of spinules. P4 basis, endopods and exopods spinulated. P5 left biramous, exopod 2- segmented, shorter than 1-segmented endopod. Right P5 uniramous, exopod 3-segmented.
Female unknown.
Etymology. From sensus (Latin, meaning sense) and avus (Latin, meaning ancestor) referring to Bradfordian copepod families, a group of Clausocalanoidea families possessing sensory setae on maxilla and maxilliped. Gender feminine.
Type species Sensiava longiseta gen. nov., sp. nov., by monotypy.
description: Published as part of Markhaseva, Elena L. & Schulz, Knud, 2006, Sensiava longiseta (Copepoda, Calanoida): a new genus and species from the abyss of the Weddell Sea, pp. 1-18 in Zootaxa 1368 on page 3, DOI: 10.5281/zenodo.174833
Semi-quantum communication: Protocols for key agreement, controlled secure direct communication and dialogue
Creators: name: Shukla, Chitra
name: Thapliyal, Kishore
name: Pathak, Anirban
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Semi-quantum protocols that allow some of the users to remain classical are proposed for a large class of problems associated with secure communication and secure multiparty computation. Specifically, first time semi-quantum protocols are proposed for key agreement, controlled deterministic secure communication and dialogue, and it is shown that the semi-quantum protocols for controlled deterministic secure communication and dialogue can be reduced to semi-quantum protocols for e-commerce and private comparison (socialist millionaire problem), respectively. Complementing with the earlier proposed semi-quantum schemes for key distribution, secret sharing and deterministic secure communication, set of schemes proposed here and subsequent discussions have established that almost every secure communication and computation tasks that can be performed using fully quantum protocols can also be performed in semi-quantum manner. Further, it addresses a fundamental question in context of a large number problems- how much quantumness is (how many quantum parties are) required to perform a specific secure communication task? Some of the proposed schemes are completely orthogonal-state-based, and thus, fundamentally different from the existing semi-quantum schemes that are conjugate-coding-based. Security, efficiency and applicability of the proposed schemes have been discussed with appropriate importance.
description: 19 pages 1 figure
Design and experimental realization of an optimal scheme for teleportion of an $n$-qubit quantum state
Creators: name: Sisodia, Mitali
name: Shukla, Abhishek
name: Thapliyal, Kishore
name: Pathak, Anirban
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An explicit scheme (quantum circuit) is designed for the teleportation of an $n$-qubit quantum state. It is established that the proposed scheme requires an optimal amount of quantum resources, whereas larger amount of quantum resources has been used in a large number of recently reported teleportation schemes for the quantum states which can be viewed as special cases of the general $n$-qubit state considered here. A trade off between our knowledge about the quantum state to be teleported and the amount of quantum resources required for the same is observed. A proof of principle experimental realization of the proposed scheme (for a 2-qubit state) is also performed using 5-qubit superconductivity-based IBM quantum computer. Experimental results show that the state has been teleported with high fidelity. Relevance of the proposed teleportation scheme has also been discussed in the context of controlled, bidirectional, and bidirectional-controlled state teleportation.
description: 11 pages 4 figures
Defensive Analysis: Soundness In Extreme Conditions (Technical Report)
Creators: name: Smaragdakis, Yannis
Publisher: name: Zenodo
Year: 2016

description: Virtually no realistic whole-program static analysis is sound,

i.e., guaranteed to over-approximate all program behaviors.

The main cause of such unsoundness is “opaque code” fea-

tures such as reflection, dynamic loading, and native calls.

We present a defensive may-point-to analysis approach,

which offers soundness in the presence of opaque code. Our

analysis assumes (unless informed otherwise) that native

code or reflection can have arbitrary effects, and arbitrary

new code can be loaded.

The analysis represents points-to information only when

it knows it to be a safe over-approximation of dynamic be-

havior. This allows us to perform a highly precise points-to

analysis (such as a 5-call-site-sensitive, flow-sensitive anal-

ysis) efficiently. We show that sound handling of opaque

code cannot be an incremental addition: the analysis logic

for other language features changes radically when opaque

code needs to be handled soundly.

Despite its conservative nature, our analysis yields sound,

actionable results for a large subset of the program code,

achieving (under worst-case assumptions) 34-74% of the

program coverage of an unsound state-of-the-art analysis for

real-world programs.
title: Massive renal replacement lipomatosis simulating pseudo-tumoral inflammatory tissue
Creators: name: Antonucci, Michela
Publisher: name: EURORAD
Year: 2022
Subjects: subject: Uroradiology & genital male imaging
subject: Abdomen
subject: Contrast agents
subject: Kidney
subject: CT
subject: Clinical Cases

description: Clinical History: A 63-year-old man, with no relevant medical history and in good clinical condition, presented to a urologist with right-side flank pain and tenderness; laboratory investigation did not reveal elevated creatinine values or inflammation markers. 

description: 63 years, male
Comparison of lower order and higher order nonclassicality in photon added and photon subtracted squeezed coherent states
Creators: name: Thapliyal, Kishore
name: Samantray, Nigam Lahiri
name: Banerji, J.
name: Pathak, Anirban
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Nonclassical properties of photon added and photon subtracted squeezed coherent states have been compared with specific focus on the higher order nonclassicalities, such as higher order squeezing, higher order sub-Poissonian photon statistics, higher order antibunching. It is observed that both photon added and photon subtracted squeezed coherent states are highly nonclassical as they satisfy criteria for all of the above mentioned nonclassicalities and a set of other criteria including negativity of Wigner function, Klyshko's criterion and Agarwal's $(A_{3})$ parameter. Further, the amount of nonclassicality present in these two types of states has been compared quantitatively using a measure of nonclassicality known as nonclassical volume. Variation in the amount of nonclassicality with the number of photon(s) added/subtracted is also investigated, and it is found that the addition of photons makes the squeezed coherent state more nonclassical than what is done by the subtraction of photons.
description: 23 pages 11 figures
Classical light vs. nonclassical light: Characterizations and interesting applications
Creators: name: Pathak, Anirban
name: Ghatak, Ajoy
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We briefly review the ideas that have shaped modern optics and have led to various applications of light ranging from spectroscopy to astrophysics, and street lights to quantum communication. The review is primarily focused on the modern applications of classical light and nonclassical light. Specific attention has been given to the applications of squeezed, antibunched, and entangled states of radiation field. Applications of Fock states (especially single photon states) in the field of quantum communication are also discussed.
description: 32 pages, 3 figures, a review on applications of light
Separation of H2O/CO2 Mixtures by MFI Membranes: Experiment and Monte Carlo Study
Creators: name: Wotzka, Alexander
name: Jorabchi, Majid Namayandeh
name: Wohlrab, Sebastian
Publisher: name: Basel : MDPI
Year: 2021
Subjects: subject: Monte Carlo simulation
subject: water
subject: carbon dioxide
subject: ZSM-5
subject: zeolite membrane
subject: 570

description: The separation of CO2 from gas streams is a central process to close the carbon cycle. Established amine scrubbing methods often require hot water vapour to desorb the previously stored CO2. In this work, the applicability of MFI membranes for H2O/CO2 separation is principally demonstrated by means of realistic adsorption isotherms computed by configurational-biased Monte Carlo (CBMC) simulations, then parameters such as temperatures, pressures and compositions were identified at which inorganic membranes with high selectivity can separate hot water vapour and thus make it available for recycling. Capillary condensation/adsorption by water in the microporous membranes used drastically reduces the transport and thus the CO2 permeance. Thus, separation factors of αH2O/CO2 = 6970 could be achieved at 70 °C and 1.8 bar feed pressure. Furthermore, the membranes were tested for stability against typical amines used in gas scrubbing processes. The preferred MFI membrane showed particularly high stability under application conditions.
Interval-type theorems concerning quasi-arithmetic means
Creators: name: Pasteczka, Paweł
Publisher: name: arXiv
Year: 2017
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: Family of quasi-arithmetic means has a natural, partial order (point-wise order) $A^{[f]}\le A^{[g]}$ if and only if $A^{[f]}(v)\le A^{[g]}(v)$ for all admissible vectors $v$ ($f,\,g$ and, later, $h$ are continuous and monotone and defined on a common interval). Therefore one can introduce the notion of interval-type sets (sets $\mathcal{I}$ such that whenever $A^{[f]} \le A^{[h]} \le A^{[g]}$ for some $A^{[f]},\,A^{[g]} \in \mathcal{I}$ then $A^{[h]} \in \mathcal{I}$ too). Our aim is to give examples of interval-type sets involving vary smoothness assumptions of generating functions.
description: 10 pages
Coalescence of Two Impurities in a Trapped One-dimensional Bose Gas
Creators: name: Dehkharghani, A. S.
name: Volosniev, A. G.
name: Zinner, N. T.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the ground state of a one-dimensional (1D) trapped Bose gas with two mobile impurity particles. To investigate this set-up, we develop a variational procedure in which the coordinates of the impurity particles are slow-like variables. We validate our method using the exact results obtained for small systems. Then, we discuss energies and pair densities for systems that contain of the order of one hundred atoms. We show that bosonic non-interacting impurities cluster. To explain this clustering, we calculate and discuss induced impurity-impurity potentials in a harmonic trap. Further, we compute the force between static impurities in a ring ({\it {à} la} the Casimir force), and contrast the two effective potentials: the one obtained from the mean-field approximation, and the one due to the one-phonon exchange. Our formalism and findings are important for understanding (beyond the polaron model) the physics of modern 1D cold-atom systems with more than one impurity.
description: Published version together with Erratum
Probing nonclassicality in an optically-driven cavity with two atomic ensembles
Creators: name: Naikoo, Javid
name: Thapliyal, Kishore
name: Pathak, Anirban
name: Banerjee, Subhashish
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The possibility of observing nonclassical features in a physical system comprised of a cavity with two ensembles of two-level atoms has been investigated by considering different configurations of the ensembles with respect to the Node and Antinode of the cavity field under the framework of open quantum systems. The study reveals the strong presence of nonclassical characters in the physical system by establishing the existence of many facets of nonclassicality, such as the sub-Poissonian boson statistics and squeezing in single modes, intermodal squeezing, intermodal entanglement, antibunching, and steering. The effect of a number of parameters, characterizing the physical system, on the different aspects of nonclassicality are also investigated. Specifically, it is observed that the depth of the nonclassicality witnessing parameters can be enhanced by externally driving one of the ensembles with an optical field. The work is done in the presence of open system effects, in particular, use is made of Langevin equations along with a suitable perturbative technique.
description: Many facets of nonclassicality has been established in a physical system comprised of a cavity with two ensembles of two-level atoms under the framework of open quantum systems
A Proximal Approach for a Class of Matrix Optimization Problems
Creators: name: Benfenati, A.
name: Chouzenoux, E.
name: Pesquet, J. -C.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 15A18 15B48 62J10 65K10 90C06 90C25 90C26 90C35

description: In recent years, there has been a growing interest in mathematical models leading to the minimization, in a symmetric matrix space, of a Bregman divergence coupled with a regularization term. We address problems of this type within a general framework where the regularization term is split in two parts, one being a spectral function while the other is arbitrary. A Douglas-Rachford approach is proposed to address such problems and a list of proximity operators is provided allowing us to consider various choices for the fit-to-data functional and for the regularization term. Numerical experiments show the validity of this approach for solving convex optimization problems encountered in the context of sparse covariance matrix estimation. Based on our theoretical results, an algorithm is also proposed for noisy graphical lasso where a precision matrix has to be estimated in the presence of noise. The nonconvexity of the resulting objective function is dealt with a majorization-minimization approach, i.e. by building a sequence of convex surrogates and solving the inner optimization subproblems via the aforementioned Douglas-Rachford procedure. We establish conditions for the convergence of this iterative scheme and we illustrate its good numerical performance with respect to state-of-the-art approaches.
Pilea Lindley 1821
Creators: name: Soares, Júlia Fialho
name: Miotto, Silvia Teresinha Sfoggia
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Rosales
Urticaceae
Pilea

description: Checklist of Pilea in the Atlantic Forest Biome circumscribed in Southeastern Brazil
Among the 14 native species of Pilea currently recognized for the Brazilian Atlantic Forest Biome (Soares & Miotto in prep.), eight occur in the Southeastern Region (Table 2). They are rupicolous or terrestrial, inhabiting moist places, shaded or with the predominance of indirect light, usually inside the forest, such as near waterfalls and streams. P. microphylla (Linnaeus 1759: 1308) Liebmann (1851: 296), P. pubescens, and Pilea hyalina Fenzl (1849: 256) are widely distributed in the Neotropical Region, occurring up to approximately 2,000 m of elevation. In the Brazilian Atlantic Forest Biome, P. hyalina is more common in coastal forests, and P. microphylla even occurs in environments with anthropogenic interferences, such as in sidewalks and walls. P. rhizobola is currently known for the Atlantic Forest Biome, occurring from the State of Bahia (BA) to the State of Santa Catarina (SC), but the collection by P. Acevedo- Rdgz 14954, from the State of Acre (AC), in the Amazonian Biome (RB!), which has few pistillate flowers and fruits, seems to belong to this species. In the Southeastern Region, this species has been recorded up to approximately 1,300 m above sea level. P. astrogramma Miquel (1853: 201) and P. bradei occur only in the Southeastern region. The first one has been recorded from 700 m to 1,600 m above sea level, and the second, from 1,100 to 1,600 m, both in Serra da Mantiqueira and its surroundings and in localities of the Serra da Bocaina closer to the Serra da Mantiqueira than to the ocean. P. carautae M.D.M.Vianna & R.J.V.Alves (2010: 469) is also restricted to the Southeastern Region, occurring in places with open vegetation and soils with high salinity, close to sea level, in municipalities from the Cabo Frio Region. P. hilariana, otherwise, is more common in the States of Southern Brazil, with the few records in the Southeastern Region all in the Serra do Mar and its surroundings, 900 m above sea level or more.
description: Published as part of Soares, Júlia Fialho & Miotto, Silvia Teresinha Sfoggia, 2023, Pilea bradei (Urticaceae), a new species from the Atlantic Forest Biome in Southeastern Brazil, pp. 161-172 in Phytotaxa 584 (3) on page 168, DOI: 10.11646/phytotaxa.584.3.3, http://zenodo.org/record/7645590
Boundary representations of $λ$-harmonic and polyharmonic functions on trees
Creators: name: Picardello, Massimo A.
name: Woess, Wolfgang
Publisher: name: arXiv
Year: 2018
Subjects: subject: Functional Analysis (math.FA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 31C20, 05C05, 28A25, 60G50

description: On a countable tree $T$, allowing vertices with infinite degree, we consider an arbitrary stochastic irreducible nearest neighbour transition operator $P$. We provide a boundary integral representation for general eigenfunctions of $P$ with eigenvalue $λ\in \mathbb{C}$. This is possible whenever $λ$ is in the resolvent set of $P$ as a self-adjoint operator on a suitable $\ell^2$-space and the on-diagonal elements of the resolvent ("Green function") do not vanish at $λ$. We show that when $P$ is invariant under a transitive (not necessarily fixed-point-free) group action, the latter condition holds for all $λ\ne 0$ in the resolvent set. These results extend and complete previous results by Cartier, by Figà-Talamanca and Steger, and by Woess. For those eigenvalues, we also provide an integral representation of $λ$-polyharmonic functions of any order $n$, that is, functions $f: T \to \mathbb{C}$ for which $(λ\cdot I - P)^n f=0$. This is a far-reaching extension of work of Cohen et al., who provided such a representation for simple random walk on a homogeneous tree and eigenvalue $λ=1$. Finally, we explain the (much simpler) analogous results for "forward only" transition operators, sometimes also called martingales on trees.
Geostatistical mapping of the depth to the bottom of magnetic sources and heat flow estimations in Mexico
Creators: name: Carrillo-De La Cruz, Juan Luis
name: Prol-Ledesma, Rosa María
name: Gabriel, Gerald
Publisher: name: Amsterdam [u.a.] : Elsevier Science
Year: 2021
Subjects: subject: Conductive heat transfer
subject: Crustal thermal structure
subject: Curie temperature
subject: Fractal magnetization model
subject: Geostatistical mapping
subject: 550

description: The depth to the bottom of magnetic sources (DBMS) is widely used as a proxy for crustal thermal structures. In this study, the DBMS is calculated using the spectral analysis of aeromagnetic data for the whole territory of Mexico. By assuming the DBMS to be related to the Curie point depth, the heat flow distribution is estimated. The DBMS and heat flow maps were constructed using geostatistical simulations to quantitatively determine standard deviation as uncertainty. The results show a good agreement with the complex geologic and tectonic setting in Mexico. Small DBMS values (high heat flow) as expected appear in areas where recent volcanism occurs and at seafloor spreading zones. In contrast, large values are present in tectonically stable zones.
Quantum cryptography: key distribution and beyond
Creators: name: H., Akshata Shenoy
name: Pathak, Anirban
name: Srikanth, R.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Uniquely among the sciences, quantum cryptography has driven both foundational research as well as practical real-life applications. We review the progress of quantum cryptography in the last decade, covering quantum key distribution and other applications.
description: It's a review on quantum cryptography and it is not restricted to QKD
title: Hemangioblastoma in the medulla oblongata
Creators: name: Vanhoenacker, Filip
Publisher: name: EURORAD
Year: 2022
Subjects: subject: Neuroradiology
subject: Head and neck
subject: Neuroradiology brain
subject: MR
subject: Clinical Cases

description: Clinical History: A 80-year-old man presented with paresthesia in the upper and lower limbs, unstable gait, dizziness and lightheadedness.

description: 80 years, male
Multiple boundary representations of $λ$-harmonic functions on trees
Creators: name: Picardello, Massimo A.
name: Woess, Wolfgang
Publisher: name: arXiv
Year: 2018
Subjects: subject: Functional Analysis (math.FA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 31C20, 05C05, 28A25, 60G50

description: We consider a countable tree $T$, possibly having vertices with infinite degree, and an arbitrary stochastic nearest neighbour transition operator $P$. We provide a boundary integral representation for general eigenfunctions of $P$ with eigenvalue $λ\in \mathbb{C}$, under the condition that the oriented edges can be equipped with complex-valued weights satisfying three natural axioms. These axioms guarantee that one can construct a $λ$-Poisson kernel. The boundary integral is with respect to distributions, that is, elements in the dual of the space of locally constant functions. Distributions are interpreted as finitely additive complex measures. In general, they do not extend to $σ$-additive measures: for this extension, a summability condition over disjoint boundary arcs is required. Whenever $λ$ is in the resolvent of $P$ as a self-adjoint operator on a naturally associated $\ell^2$-space and the diagonal elements of the resolvent (`Green function') do not vanish at $λ$, one can use the ordinary edge weights corresponding to the Green function and obtain the ordinary $λ$-Martin kernel. We then consider the case when $P$ is invariant under a transitive group action. In this situation, we study the phenomenon that in addition to the $λ$-Martin kernel, there may be further choices for the edge weights which give rise to another $λ$-Poisson kernel with associated integral representations. In particular, we compare the resulting distributions on the boundary. The material presented here is closely related to the contents of our `companion' paper arXiv:1802.01976
A new validation scheme for the evaluation of multiparameter fields
Creators: name: Gerstengarbe, F.-W.
name: Kücken, M.
name: Werner, P.C.
Publisher: name: Abingdon : Taylor and Francis Ltd.
Year: 2005
Subjects: subject: model validation
subject: 550

description: On the basis of an extended cluster analysis algorithm, we present a new validation method for the evaluation of simulation experiments characterized by more than one parameter. This method allows the assessment of any parameter combination in space and time. As an example for the effectiveness of the algorithm, the results of two regional climate model runs and observational data have been tested and interpreted.
Kak's three-stage protocol of secure quantum communication revisited: Hitherto unknown strengths and weaknesses of the protocol
Creators: name: Thapliyal, Kishore
name: Pathak, Anirban
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Kak's three-stage protocol for quantum key distribution is revisited with special focus on its hitherto unknown strengths and weaknesses. It is shown that this protocol can be used for secure direct quantum communication. Further, the implementability of this protocol in the realistic situation is analyzed by considering various Markovian noise models. It is found that the Kak's protocol and its variants in their original form can be implemented only in a restricted class of noisy channels, where the protocols can be transformed to corresponding protocols based on logical qubits in decoherence free subspace. Specifically, it is observed that Kak's protocol can be implemented in the presence of collective rotation and collective dephasing noise, but cannot be implemented in its original form in the presence of other types of noise, like amplitude damping and phase damping noise. Further, the performance of the protocol in the noisy environment is quantified by computing average fidelity under various noise models, and subsequently a set of preferred states for secure communication in noisy environment have also been identified.
description: Kak's protocol is not suitable for quantum cryptography in presence of noise
Proton-driven patterning of bulk transition metal dichalcogenides
Creators: name: Tedeschi, Davide
name: Felici, Marco
name: Pettinari, Giorgio
name: Blundo, Elena
name: Petroni, Elisa
name: Sennato, Simona
name: Zhang, Christopher
name: Lu, Yuerui
name: Polimeni, Antonio
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: At the few-atom-thick limit, transition metal dichalcogenides (TMDs) exhibit a host of attractive electronic optical, and structural properties. The possibility to pattern these properties has a great impact on applied and fundamental research. Here, we demonstrate spatial control over the light emission, lattice deformation, and hydrogen storage in bulk TMDs. By low-energy proton irradiation, we create uniquely favorable conditions for the production and accumulation of molecular hydrogen just one or few monolayers beneath the crystal basal plane of bulk WS2, WSe2, WTe2, MoSe2, and MoS2 samples. H2 therein produced coalesces to form bubbles, which lead to the localized swelling of one X-M-X plane prevalently. This results eventually in the creation of atomically thin domes filled with molecular hydrogen at 10 atm. The domes emit light strongly well above room temperature and can store H2 indefinitely. They can be produced with the desired density, well-ordered positions, and size tunable from the nanometer to the micrometer scale, thus providing a template for the manageable and durable mechanical and electronic structuring of two-dimensional materials.
Socialising the genome: making genomics resonate
Creators: name: Middleton, Anna
Publisher: name: F1000 Research Limited
Year: 2018

description: Presentation given to at the first World Congress on Genetic Counselling, Wellcome Genome Campus, Cambridge, UK (October 2017). Explores the public's familiarity with genomics and empirical data on public attitudes towards genomic data sharing. The slides contain many filmed animations that present the empirical data, these can be seen more clearly in a video of the presentation here. Details of the research projects that guide this presentation can be found here.
JICG CMOS transistors for reduction of total ionizing dose and single event effects in a 130 nm bulk SiGe BiCMOS technology
Creators: name: Sorge, R.
name: Schmidt, J.
name: Wipf, Ch.
name: Reimer, F.
name: Teply, F.
name: Korndörfer, F.
Publisher: name: Amsterdam : North-Holland Publ. Co.
Year: 2020
Subjects: subject: Radiation hardening (electronics)
subject: Radiofrequency integrated circuits
subject: Total ionizing dose
subject: 530

description: We report on a novel radiation hardening by design (RHBD) approach for mitigation of total ionization dose (TID) induced drain leakage currents and single event transient (SET) in digital circuits fabricated in a 130 nm bulk SiGe BiCMOS technology. In order to avoid significant TID induced increase of drain leakage currents for NMOS transistors and channel pinch-off for PMOS transistors due to positive charges trapped at the lateral shallow trench insulator silicon interface we introduced junction isolation (JI) for the lateral MOS channel regions. The device construction measures applied also support to suppress the generation SETs. The tolerance of JI MOS transistors against TID induced drain leakage currents was verified up to a TID > 1.3 Mrad(Si). SET tests performed at four different inverter types varying in the arrangement the deep well in the layout. For CMOS inverters with isolated NMOS transistors a LET threshold > 130 MeV cm2 mg−1 was obtained.
Comment on "Quantum Teleportation of Eight-Qubit State via Six-Qubit Cluster State"
Creators: name: Sisodia, Mitali
name: Pathak, Anirban
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, Zhao et al., (Int. J. Theor. Phys. 57, 516-522 (2018)) have proposed a scheme for quantum teleportation of an eight-qubit quantum state using a six qubit cluster state. In this comment, it's shown that the quantum resource (multi-partite entangled state used as the quantum channel) used by Zhao et al., is excessively high and the task can be performed using any two Bell states as the task can be reduced to the teleportation of an arbitrary two qubit state. Further, a trivial conceptual mistake made by Zhao et al., in the description of the quantum channel has been pointed out. It's also mentioned that recently a trend of proposing teleportation schemes with excessively high quantum resources has been observed and the essence of this comment is applicable to all such proposals.
description: It is shown that teleportation of multi qubit-states can be done using Bell states
ECONOMIC SIGNIFICANCE AND SUSTAINABILITY IN THE WATER INDUSTRY
Creators: name: Maria, Elena Rodriguez Fuentes
Publisher: name: ZAP Journal
Year: 2024
Subjects: Water Supply Utilities, Sustainability, Public Perception, Regulatory Standards, Economic Significance

description: Water supply utilities, once operating in relative obscurity, have now become the focus of heightened scrutiny. The convergence of stringent drinking water and environmental standards, along with increased public awareness and financial challenges, has led to waning confidence in the competence and sustainability of these utilities. Despite these challenges, the water industry remains a substantial and expanding sector, with its true economic significance only recently coming to light. This study examines the evolving landscape of the water industry, highlighting the varied growth across its sectors and the trend towards consolidation and unification within the industry. Through an analysis of current regulatory frameworks, public perceptions, and economic data, the research aims to provide a comprehensive understanding of the factors driving the transformation of water supply utilities. The findings underscore the need for innovative approaches to enhance the efficiency, sustainability, and public trust in the water industry, ensuring its continued growth and relevance in the global economy
Creep and Residual Properties of Filament-Wound Composite Rings under Radial Compression in Harsh Environments
Creators: name: Eggers, Frederico
name: Almeida, José Humberto S.
name: Lisbôa, Tales V.
name: Amico, Sandro C.
Publisher: name: Basel : MDPI
Year: 2021
Subjects: subject: Creep
subject: Filament-wound ring
subject: Hygrothermal conditioning
subject: Radial compression
subject: 540

description: This work focuses on the viscoelastic response of carbon/epoxy filament-wound composite rings under radial compressive loading in harsh environments. The composites are exposed to three hygro-thermo-mechanical conditions: (i) pure mechanical loading, (ii) mechanical loading in a wet environment and (iii) mechanical loading under hygrothermal conditioning at 40 ∘C. Dedicated equipment was built to carry out the creep experiments. Quasi-static mechanical tests are performed before and after creep tests to evaluate the residual properties of the rings. The samples are tested in (i) radial compression, (ii) axial compression, and (iii) hoop tensile strength. Different laminates wound at off-axis orientations are manufactured via filament winding and analyzed. Key results show that creep displacement is affected by both hygrothermal and mechanical conditionings, especially at a higher temperature. Moreover, residual properties are quantified showing that creep generates permanent damage in the cylinders.
Predicting Tactical Solutions to Operational Planning Problems under Imperfect Information
Creators: name: Larsen, Eric
name: Lachapelle, Sébastien
name: Bengio, Yoshua
name: Frejinger, Emma
name: Lacoste-Julien, Simon
name: Lodi, Andrea
Publisher: name: arXiv
Year: 2018
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This paper offers a methodological contribution at the intersection of machine learning and operations research. Namely, we propose a methodology to quickly predict expected tactical descriptions of operational solutions (TDOSs). The problem we address occurs in the context of two-stage stochastic programming where the second stage is demanding computationally. We aim to predict at a high speed the expected TDOS associated with the second stage problem, conditionally on the first stage variables. This may be used in support of the solution to the overall two-stage problem by avoiding the online generation of multiple second stage scenarios and solutions. We formulate the tactical prediction problem as a stochastic optimal prediction program, whose solution we approximate with supervised machine learning. The training dataset consists of a large number of deterministic operational problems generated by controlled probabilistic sampling. The labels are computed based on solutions to these problems (solved independently and offline), employing appropriate aggregation and subselection methods to address uncertainty. Results on our motivating application on load planning for rail transportation show that deep learning models produce accurate predictions in very short computing time (milliseconds or less). The predictive accuracy is close to the lower bounds calculated based on sample average approximation of the stochastic prediction programs.
UTLS temperature validation of MPI-ESM decadal hindcast experiments with GPS radio occultations
Creators: name: Schmidt, Torsten
name: Schoon, Lena
name: Dobslaw, Henryk
name: Matthes, Katja
name: Thomas, Maik
name: Wickert, Jens
Publisher: name: Stuttgart : E. Schweizerbart Science Publishers
Year: 2015
Subjects: subject: Decadal hindcast experiments
subject: MPI-ESM
subject: Radio occultation
subject: UTLS temperature
subject: 550

description: Global Positioning System (GPS) radio occultation (RO) temperature data are used to validate MPI-ESM (Max Planck Institute – Earth System Model) decadal hindcast experiments in the upper troposphere and lower stratosphere (UTLS) region between 300 hPa and 10 hPa (8 km and 32 km) for the time period between 2002 and 2011. The GPSRO dataset is unique since it is very precise, calibration independent and covers the globe better than the usual radiosonde dataset. In addition it is vertically finer resolved than any of the existing satellite temperature measurements available for the UTLS and provides now a unique one decade long temperature validation dataset. The initialization of the MPI-ESM decadal hindcast runs mostly increases the skill of the atmospheric temperatures when compared to uninitialized climate projections with very high skill scores for lead-year one, and gradually decreases for the later lead-years. A comparison between two different initialization sets (b0, b1) of the low-resolution (LR) MPI-ESM shows increased skills in b1-LR in most parts of the UTLS in particular in the tropics. The medium resolution (MR) MPI-ESM initializations are characterized by reduced temperature biases in the uninitialized runs as compared to observations and a better capturing of the high latitude northern hemisphere interannual polar vortex variability as compared to the LR model version. Negative skills are found for the b1-MR hindcasts however in the regions around the mid-latitude tropospheric jets on both hemispheres and in the vicinity of the tropical tropopause in comparison to the b1-LR variant. It is interesting to highlight that none of the model experiments can reproduce the observed positive temperature trend in the tropical tropopause region since 2001 as seen by GPSRO data.
Fast Approximate Clearance Evaluation for Rovers with Articulated Suspension Systems
Creators: name: Otsu, Kyohei
name: Matheron, Guillaume
name: Ghosh, Sourish
name: Toupet, Olivier
name: Ono, Masahiro
Publisher: name: arXiv
Year: 2018
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: We present a light-weight body-terrain clearance evaluation algorithm for the automated path planning of NASA's Mars 2020 rover. Extraterrestrial path planning is challenging due to the combination of terrain roughness and severe limitation in computational resources. Path planning on cluttered and/or uneven terrains requires repeated safety checks on all the candidate paths at a small interval. Predicting the future rover state requires simulating the vehicle settling on the terrain, which involves an inverse-kinematics problem with iterative nonlinear optimization under geometric constraints. However, such expensive computation is intractable for slow spacecraft computers, such as RAD750, which is used by the Curiosity Mars rover and upcoming Mars 2020 rover. We propose the Approximate Clearance Evaluation (ACE) algorithm, which obtains conservative bounds on vehicle clearance, attitude, and suspension angles without iterative computation. It obtains those bounds by estimating the lowest and highest heights that each wheel may reach given the underlying terrain, and calculating the worst-case vehicle configuration associated with those extreme wheel heights. The bounds are guaranteed to be conservative, hence ensuring vehicle safety during autonomous navigation. ACE is planned to be used as part of the new onboard path planner of the Mars 2020 rover. This paper describes the algorithm in detail and validates our claim of conservatism and fast computation through experiments.