cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
La mort : étude thématique du théâtre de Genet
Creators: name: Ballantyne, Patricia Lynn
Publisher: name: University of British Columbia
Year: 2010

description: The theme of death underlying Jean Genet's works is particularly evident in his theatre where it appears in manifold forms. The presence of this theme in four of his plays, "Haute Surveillance", "Les Bonnes", "Le Balcon" and "Les Nègres" will be discussed in the following study where it may be seen that this central aspect of his work expresses itself through his choice of characters and plot. Even the decor reveals that Death is ever present. The driving force which motivates his characters' actions and creates the plot lies buried deep in their unconscious, therefore a psychoanalytic approach, based on Freud's theory of the death instinct, has been used in this study. The aggressive tendencies produced by the death instinct in Genet's characters can be divided into two categories: destruction of the other and self-destruction. Murder, suicide or human sacrifice result when the death instinct holds full sway in the character's ego, while repetitious suffering in the form of sadism or masochism prevails when the full force of the death instinct is mitigated by the presence of its complementary opposite, Eros. Although the acts of the characters vary significantly, it becomes apparent that three underlying causes are common to the aggressive behaviour of all the characters studied in the plays. They are ignorance of the "self" and the nature of others, fear (accompanied by a feeling of impotence) caused by this ignorance and the impossible wish to dominate others and one's own mortality. It mould seem that the tragedy of Genet's characters lies in the fact that they never realize their own capacity for self-determination. Consequently, their actions are all in vain because they only lead to the senseless repetition of suffering or premature death.
Decentralised Trustworthy Collaborative Intrusion Detection System for IoT
Creators: name: Putra, Guntur Dharma
name: Dedeoglu, Volkan
name: Pathak, Abhinav
name: Kanhere, Salil S.
name: Jurdak, Raja
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Intrusion Detection Systems (IDS) have been the industry standard for securing IoT networks against known attacks. To increase the capability of an IDS, researchers proposed the concept of blockchain-based Collaborative-IDS (CIDS), wherein blockchain acts as a decentralised platform allowing collaboration between CIDS nodes to share intrusion related information, such as intrusion alarms and detection rules. However, proposals in blockchain-based CIDS overlook the importance of continuous evaluation of the trustworthiness of each node and generally work based on the assumption that the nodes are always honest. In this paper, we propose a decentralised CIDS that emphasises the importance of building trust between CIDS nodes. In our proposed solution, each CIDS node exchanges detection rules to help other nodes detect new types of intrusion. Our architecture offloads the trust computation to the blockchain and utilises a decentralised storage to host the shared trustworthy detection rules, ensuring scalability. Our implementation in a lab-scale testbed shows that the our solution is feasible and performs within the expected benchmarks of the Ethereum platform.
description: 8 pages, 7 figures, accepted to IEEE Blockchain 2021
Non-Markovian dynamics of a single electron spin coupled to a nuclear spin bath
Creators: name: Ferraro, E.
name: Breuer, H. -P.
name: Napoli, A.
name: Jivulescu, M. A.
name: Messina, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We apply the time-convolutionless (TCL) projection operator technique to the model of a central spin which is coupled to a spin bath via nonuniform Heisenberg interaction. The second-order results of the TCL method for the coherences and populations of the central spin are determined analytically and compared with numerical simulations of the full von Neumann equation of the total system. The TCL approach is found to yield an excellent approximation in the strong field regime for the description of both the short-time dynamics and the long time behavior.
description: 8 pages, 9 figures
Reply to: Comment on (t, n) Threshold d-level Quantum Secret Sharing
Creators: name: Li, Chuang
name: Zhang, Longwei
name: Song, Xiuli
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A corresponding comment, raised by Kao and Hwang, claims that the reconstructor Bob1 is unable to obtain the expected secret information in (t, n) Threshold d-level Quantum Secret Sharing (TDQSS)[Scientific Reports, Vol. 7, No. 1 (2017), pp.6366] . In this reply, we show the TDQSS scheme can obtain the dealer's secret information in the condition of adding a step on disentanglement.
description: 4 pages,2 figures
DeepAID: Interpreting and Improving Deep Learning-based Anomaly Detection in Security Applications
Creators: name: Han, Dongqi
name: Wang, Zhiliang
name: Chen, Wenqi
name: Zhong, Ying
name: Wang, Su
name: Zhang, Han
name: Yang, Jiahai
name: Shi, Xingang
name: Yin, Xia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Unsupervised Deep Learning (DL) techniques have been widely used in various security-related anomaly detection applications, owing to the great promise of being able to detect unforeseen threats and superior performance provided by Deep Neural Networks (DNN). However, the lack of interpretability creates key barriers to the adoption of DL models in practice. Unfortunately, existing interpretation approaches are proposed for supervised learning models and/or non-security domains, which are unadaptable for unsupervised DL models and fail to satisfy special requirements in security domains. In this paper, we propose DeepAID, a general framework aiming to (1) interpret DL-based anomaly detection systems in security domains, and (2) improve the practicality of these systems based on the interpretations. We first propose a novel interpretation method for unsupervised DNNs by formulating and solving well-designed optimization problems with special constraints for security domains. Then, we provide several applications based on our Interpreter as well as a model-based extension Distiller to improve security systems by solving domain-specific problems. We apply DeepAID over three types of security-related anomaly detection systems and extensively evaluate our Interpreter with representative prior works. Experimental results show that DeepAID can provide high-quality interpretations for unsupervised DL models while meeting the special requirements of security domains. We also provide several use cases to show that DeepAID can help security operators to understand model decisions, diagnose system mistakes, give feedback to models, and reduce false positives.
description: Accepted by 2021 ACM SIGSAC Conference on Computer and Communications Security (CCS '21)
title: Polyviduen: Liebe und Subjektivierung in Mehrfachpartnerschaften
Creators: name: Schadler, Cornelia
Publisher: name: Humboldt-Universität zu Berlin
Year: 2016
Subjects: subject: Individualisierung
subject: Intimität
subject: Liebe
subject: Polyamorie
subject: Sexualität
subject: Subjektivierung
subject: ddc:300

description: Der Beitrag beschäftigt sich mit Intimitätsund Subjektivierungsformen in Mehrfachpartnerschaften, insbesondere in polyamoren Beziehungen. In einer Analyse von narrativen Interviews zu Beziehungsbiografien gehen wir dabei besonders auf Selbstdefinitionen der Beziehungsform und Erzählungen über Beziehungsalltage ein. Beziehungen definieren sich, so stellen wir fest, in Mehrfachpartnerschaften nicht über vordefinierte Subjektpositionen, sondern über dynamische Relationen innerhalb eines Beziehungsgeflechts. Dabei ziehen Benennungs- als Vereindeutigungspraktiken die Grenzen zwischen spezifischen Partnerschaften, während Intimität (Gefühle von Liebe, intensive persönliche Beziehungen oder Sexualität) auch in unbenannten, also unbestimmte( re)n Beziehungen gelebt werden kann. Die Beziehungskonstellationen scheinen vor allem eins: Aushandlungssache. In diesen Verhandlungen von Liebe und Intimität bilden sich Subjekte, die sich einerseits als hochindividualisierte Menschen mit hochspezifischen Bedürfnissen artikulieren, deren Grenzen andererseits durch die Imperative der Ehrlichkeit und Offenheit in den Beziehungen auch brüchig sind. Wir interpretieren dieses Selbstverhältnis als Subjektform ‚Polyviduen‘, d. h. Immer-Vielfach-Verbundene, die innerhalb dieses Verbundenseins zugleich hoch individuell sind. Fixe Vorstellungen von vergeschlechtlichen Bedürfnissen oder Geschlechterrollen finden wir in den Daten entgegen unserer Erwartungen kaum. Vordergründig geben sich Polyviduen als geschlechtslose Verhandlungspartner*innen.
Unlocking Health Potential: Nutritional Supplements from Multi-Millet Based Foods
Creators: name: Anurag1, Akhilesh Singh2 Ashutosh Rai 3, and Deepak Prajapati4
Publisher: name: The Science world a Monthly e magazine
Year: 2023

description: In earlier times, the major cereals and millets consumed in India are, sorghum, rice flour, bajra, foxtail, little and ragi. These grains are the main sources of energy as they contain 70-80% of starch and contributing about 70-80% of daily energy intake of Indian diet. Since cereals/millets are the cheapest source of energy, their contribution of energy intake is highest among the poor income families. Cereals contain protein, calcium, iron, and B-complex vitamins and provide more than 50% of daily protein intake. Millet is a generic term used for small sized grains that form heterogeneous group and referred along with maize and sorghum as 'coarse cereals'. Millets are small-seeded, annual cereal grasses which can be well adapted to warm climates. At least four verities of millets are extensively grown in certain components of the world.
Apparent superluminal advancement of a single photon far beyond its coherence length
Creators: name: Cialdi, S.
name: Boscolo, I.
name: Castelli, F.
name: Petrillo, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present experimental results relative to superluminal propagation based on a single photon traversing an optical system, called 4f-system, which acts singularly on the photon's spectral component phases. A single photon is created by a CW laser light down{conversion process. The introduction of a linear spectral phase function will lead to the shift of the photon peak far beyond the coherence length of the photon itself (an apparent superluminal propagation of the photon). Superluminal group velocity detection is done by interferometric measurement of the temporal shifted photon with its correlated untouched reference. The observed superluminal photon propagation complies with causality. The operation of the optical system allows to enlighten the origin of the apparent superluminal photon velocity. The experiment foresees a superluminal effect with single photon wavepackets.
description: 11 pages, 2 figures
title: Relevanzsetzungen von Geschlecht in der Kindertageseinrichtung – theoretische und empirische Perspektiven
Creators: name: Kubandt, Melanie
Publisher: name: Humboldt-Universität zu Berlin
Year: 2016
Subjects: subject: Doing Gender
subject: Erziehung
subject: Geschlechtergleichheit
subject: Kinderbetreuung
subject: Kindertageseinrichtung
subject: Vorabmarkierungen
subject: ddc:370

description: In frühpädagogischen Debatten wird Geschlecht in der Regel als Unterschiede zwischen Jungen und Mädchen thematisiert. Eine Perspektive auf Geschlechterdifferenz lässt sich beispielsweise für Studien und die elementarpädagogischen Bildungspläne nachzeichnen. Angenommene Differenzen bilden somit die Ausgangsfolie, an die normative Setzungen von dem, wie Geschlecht verhandelt werden sollte, anknüpfen, ohne dass zugrunde gelegte Vorannahmen fundiert werden. Welche Relevanzen die Akteur_innen in Kindertageseinrichtungen selbst mit Geschlecht verbinden, ist hingegen kaum erforscht. Hierzu wird eine qualitativ-rekonstruktive Studie zu doing gender in einer Kindertageseinrichtung vorgestellt, die Fachkräfte, Kinder und Eltern mittels teilnehmender Beobachtung ethnographisch untersucht hat. Auf der Basis empirischer Ergebnisse zu Geschlechterkonstruktionen von Kindern und Fachkräften, die vermeintlich geschlechterneutral agieren, werden Leerstellen frühpädagogischer Geschlechterdebatten aufgezeigt.
PeV photon and neutrino flares from galactic gamma-ray binaries
Creators: name: Bykov, A. M.
name: Petrov, A. E.
name: Kalyashova, M. E.
name: Troitsky, S. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The high-energy radiation from short period binaries containing a massive star with a compact relativistic companion was detected from radio to TeV gamma rays. We show here that PeV regime protons can be efficiently accelerated in the regions of collision of relativistic outflows of a compact object with stellar winds in these systems. The accelerated proton spectra in the presented Monte Carlo model have an upturn in the PeV regime and can provide very hard spectra of sub-PeV photons and neutrinos by photo-meson processes in the stellar radiation field. Recent report of a possible sub-PeV gamma-ray flare in coincidence with a high-energy neutrino can be understood in the frame of this model. The gamma-ray binaries may contribute substantially to the Galactic component of the detected high-energy neutrino flux.
description: 7 pages, 3 figures, ApJL, in press
Backreaction of superhorizon perturbations in scalar field cosmologies
Creators: name: Kumar, Naresh
name: Flanagan, Eanna E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been suggested that the acceleration of the Universe may be due to the backreaction of perturbations to the Friedmann-Robertson-Walker background. For a Universe dominated by cold dark matter, it is known that the backreaction of superhorizon perturbations can not drive acceleration. We extend this result to models with cold dark matter together with a scalar field. We show that the scalar field can drive acceleration only via the standard mechanism of a constant or nearly constant piece of its potential (i.e., a cosmological constant); there is no separate mechanism involving superhorizon backreaction. This rules out some models which have been proposed in the literature.
description: 5 pages
Frutos errantes: inespecificidade encarnada no fazer cartonero
Creators: name: Lisboa, Frederico Ranck
Publisher: name: Labfront/UEMG
Year: 2023

description: O presente artigo propõe uma análise do fazer cartonero como uma experiência do entre. Essa prática está ligada a um movimento editorial-artístico-literário que tem como marco inicial o surgimento de Eloísa Cartonera e seus livros com capas de papelão, na efervescente Buenos Aires do início do século XXI. Para compreender as especificidades do entre cartonero, discute-se ideias em torno da inespecificidade na arte contemporânea (GARRAMUÑO, 2014) a partir de discursos autorreferentes das cartoneras aqui tomados como narrativas errantes, objeto de análise da errantologia (JACQUES, 2012).
SL(2,R) matrix model and supersymmetric Yang-Mills integrals
Creators: name: Tierz, Miguel
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The density of states of Yang-Mills integrals in the supersymmetric case is characterized by power-law tails whose decay is independent of N, the rank of the gauge group. It is believed that this has no counterpart in matrix models, but we construct a matrix model that exactly exhibits this property. In addition, we show that the eigenfunctions employed to construct the matrix model are invariant under the collinear subgroup of conformal transformations, SL(2,R). We also show that the matrix model itself is invariant under a fractional linear transformation. The wave functions of the model appear in the trigonometric Rosen-Morse potential and in free relativistic motion on AdS space.
description: 4 pages, two columns, REVTeX 4
LSTM Hyper-Parameter Selection for Malware Detection: Interaction Effects and Hierarchical Selection Approach
Creators: name: Sewak, Mohit
name: Sahay, Sanjay K.
name: Rathore, Hemant
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Long-Short-Term-Memory (LSTM) networks have shown great promise in artificial intelligence (AI) based language modeling. Recently, LSTM networks have also become popular for designing AI-based Intrusion Detection Systems (IDS). However, its applicability in IDS is studied largely in the default settings as used in language models. Whereas security applications offer distinct conditions and hence warrant careful consideration while applying such recurrent networks. Therefore, we conducted one of the most exhaustive works on LSTM hyper-parameters for IDS and experimented with approx. 150 LSTM configurations to determine its hyper-parameters relative importance, interaction effects, and optimal selection approach for designing an IDS. We conducted multiple analyses of the results of these experiments and empirically controlled for the interaction effects of different hyper-parameters covariate levels. We found that for security applications, especially for designing an IDS, neither similar relative importance as applicable to language models is valid, nor is the standard linear method for hyper-parameter selection ideal. We ascertained that the interaction effect plays a crucial role in determining the relative importance of hyper-parameters. We also discovered that after controlling for the interaction effect, the correct relative importance for LSTMs for an IDS is batch-size, followed by dropout ratio and padding. The findings are significant because when LSTM was first used for language models, the focus had mostly been on increasing the number of layers to enhance performance.
title: Ambivalente Männlichkeitskonstruktionen von Vätern zwischen Erwerbsarbeit und Fürsorgearbeit
Creators: name: Prietl, Bianca
Publisher: name: Humboldt-Universität zu Berlin
Year: 2016
Subjects: subject: Diskurs
subject: Erwerbsarbeit
subject: Fürsorgearbeit
subject: Männlichkeit
subject: Väter
subject: ddc:300

description: Gesellschaftliche Männlichkeitsentwürfe befinden sich derzeit im Umbruch. Damit gewinnen auch neue Vorstellungen von Vaterschaft an Bedeutung. Vor diesem Hintergrund analysiert der Beitrag aus diskurstheoretischer Perspektive die Subjektposition des Vaters als Männlichkeitskonstruktion in Diskussionen rund um das Thema Väterkarenz. Dabei werden Ungleichzeitigkeiten und Widersprüchlichkeiten auf der Ebene des Diskursiven sichtbar, denen insbesondere mit Blick auf das Spannungsverhältnis von Erwerbsarbeit und väterlicher Fürsorgearbeit nachgegangen wird. Es wird vorgeschlagen, diese Disparitäten als Ambivalenz zu interpretieren und damit das Subjekt Vater als auf einer ambivalenten Männlichkeitskonstruktion basierend zu verstehen.
Branching Fractions and CP-Violating Asymmetries in Radiative B Decays to eta K gamma
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present measurements of the CP-violation parameters S and C for the radiative decay B0 -> eta K0s gamma; for B -> eta K gamma we also measure the branching fractions and for B+ -> eta K+ gamma the time-integrated charge asymmetry Ach. The data, collected with the BaBar detector at the Stanford Linear Accelerator Center, represent $465 \times 10^6$ BBbar pairs produced in $e^{+} e^{-}$ annihilation. The results are $S = -0.18^{+0.49}_{-0.46} \pm 0.12$, $C = -0.32^{+0.40}_{-0.39} \pm 0.07$, BF(B0 -> eta K0 gamma) = $(7.1^{+2.1}_{-2.0} \pm 0.4) \times 10^{-6}$, BF(B+ -> eta K+ gamma) = $(7.7+-1.0 \pm 0.4) \times 10^{-6}$, and Ach = $(-9.0^{+10.4}_{-9.8} \pm 1.4) \times 10^{-2}$. The first error quoted is statistical and the second systematic.
description: 7 pages, 4 postscript figures, submitted to Phys. Rev. Letters
On the focusing of thermal images
Creators: name: Faundez-Zanuy, Marcos
name: Mekyska, Jiří
name: Espinosa-Duro, Virginia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this paper we present a new thermographic image database suitable for the analysis of automatic focus measures. This database consists of 8 different sets of scenes, where each scene contains one image for 96 different focus positions. Using this database we evaluate the usefulness of six focus measures with the goal to determine the optimal focus position. Experimental results reveal that an accurate automatic detection of optimal focus position is possible, even with a low computational burden. We also present an acquisition tool able to help the acquisition of thermal images. To the best of our knowledge, this is the first study about automatic focus of thermal images.
description: 11 pages, published in Pattern Recognition Letters, Volume 32, Issue 11, 2011, Pages 1548-1557
Hyperspace Neighbor Penetration Approach to Dynamic Programming for Model-Based Reinforcement Learning Problems with Slowly Changing Variables in A Continuous State Space
Creators: name: Zha, Vincent
name: Chiu, Ivey
name: Guilbault, Alexandre
name: Tatis, Jaime
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Slowly changing variables in a continuous state space constitute an important category of reinforcement learning and see its application in many domains, such as modeling a climate control system where temperature, humidity, etc. change slowly over time. However, this subject is less addressed in recent studies. Classical methods with certain variants, such as Dynamic Programming with Tile Coding which discretizes the state space, fail to handle slowly changing variables because those methods cannot capture the tiny changes in each transition step, as it is computationally expensive or impossible to establish an extremely granular grid system. In this paper, we introduce a Hyperspace Neighbor Penetration (HNP) approach that solves the problem. HNP captures in each transition step the state's partial "penetration" into its neighboring hyper-tiles in the gridded hyperspace, thus does not require the transition to be inter-tile in order for the change to be captured. Therefore, HNP allows for a very coarse grid system, which makes the computation feasible. HNP assumes near linearity of the transition function in a local space, which is commonly satisfied. In summary, HNP can be orders of magnitude more efficient than classical method in handling slowly changing variables in reinforcement learning. We have made an industrial implementation of NHP with a great success.
description: 8 pages, 7 figures
Necessary and sufficient conditions for bipartite entanglement
Creators: name: Sperling, J.
name: Vogel, W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Necessary and sufficient conditions for bipartite entanglement are derived, which apply to arbitrary Hilbert spaces. Motivated by the concept of witnesses, optimized entanglement inequalities are formulated solely in terms of arbitrary Hermitian operators, which makes them useful for applications in experiments. The needed optimization procedure is based on a separability eigenvalue problem, whose analytical solutions are derived for a special class of projection operators. For general Hermitian operators, a numerical implementation of entanglement tests is proposed. It is also shown how to identify bound entangled states with positive partial transposition.
description: 7 pages, 2 figure
title: Modernisiertes Patriarchat? Von der heterosexuellen Liebe zwischen ‚Schlampen‘, ‚Prinzessinnen‘ und ‚(Nicht-)Rittern‘, wie sie Jugendliche erzählen
Creators: name: Götsch, Monika
Publisher: name: Humboldt-Universität zu Berlin
Year: 2016
Subjects: subject: Heteronormativität
subject: Jugendliche
subject: Liebe
subject: Patriarchat
subject: Sexualität
subject: ddc:370

description: Der Begriff des Patriarchats ist aus der Geschlechterforschung fast verschwunden, was jedoch mit dem Blick auf Erzählungen Jugendlicher über die Liebe fragwürdig erscheint. In Gruppendiskussionen und Einzelinterviews wird die Liebe von jugendlichen Real- und Berufsschüler_innen nicht nur als heteronormatives Projekt, sondern auch als patriarchales Projekt erzählt. Heterosexuelle Liebe braucht demnach die Hierarchie zwischen aktiven, dominanten Jungen (‚Rittern‘ und ‚Nicht-Rittern‘) und passiven Mädchen (‚Prinzessinnen‘ und ‚Nicht-Schlampen‘) ebenso wie scheinbar gleichberechtigte Aushandlungsprozesse. Verwiesen wird damit auf ein modernisiertes Patriarchat, das als gesellschaftliches Herrschaftsverhältnis zwar widersprüchlich, aber dennoch weiterhin wirkmächtig ist.
Charge carrier induced barrier height reduction at organic heterojunctions
Creators: name: Tsang, S. W.
name: Denhoff, M. W.
name: Tao, Y.
name: Lu, Z. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In order to provide an accurate theoretical description of current density voltage (J-V) characteristics of an organic heterojunction device over a wide range of electric fields at various temperatures, it is proposed that an accumulation of charge carriers at the heterojunction will lead to a reduction in the barrier height across the heterojunction. Two well-known hole transporting materials, 4,4,4-Tris(N-3-methylphenyl-N-phenyl-amino) triphenylamine (MTDATA) and N,N-diphenyl-N,N-bis(1-naphthyl)(1,1-biphenyl)-4,4diamine (NPB) were used to fabricate unipolar heterojunction devices. It is found that the J-V characteristics depends strongly on applied bias. The simulated J-V characteristics of the heterojunction device, with the modified injection model, are found to be in excellent agreement with the experimental data.
description: 4 pages, 4 figures, published in Phys. Rev. B Vol. 78, No. 8, http://link.aps.org/abstract/PRB/v78/e081301
Spin dynamics in (III,Mn)V ferromagnetic semiconductors: the role of correlations
Creators: name: Kapetanakis, M. D.
name: Perakis, I. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We address the role of correlations between spin and charge degrees of freedom on the dynamical properties of ferromagnetic systems governed by the magnetic exchange interaction between itinerant and localized spins. For this we introduce a general theory that treats quantum fluctuations beyond the Random Phase Approximation based on a correlation expansion of the Green's function equations of motion. We calculate the spin susceptibility, spin--wave excitation spectrum, and magnetization precession damping. We find that correlations strongly affect the magnitude and carrier concentration dependence of the spin stiffness and magnetization Gilbert damping.
description: 4 pages, 3 figures, content and figures changed, published in Phys. Rev. Lett
Tunable and Transferable Diamond Membranes for Integrated Quantum Technologies
Creators: name: Guo, Xinghan
name: Delegan, Nazar
name: Karsch, Jonathan C.
name: Li, Zixi
name: Liu, Tianle
name: Shreiner, Robert
name: Butcher, Amy
name: Awschalom, David D.
name: Heremans, F. Joseph
name: High, Alexander A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Color centers in diamond are widely explored as qubits in quantum technologies. However, challenges remain in the effective and efficient integration of these diamond-hosted qubits in device heterostructures. Here, nanoscale-thick uniform diamond membranes are synthesized via "smart-cut" and isotopically (12C) purified overgrowth. These membranes have tunable thicknesses (demonstrated 50 nm to 250 nm), are deterministically transferable, have bilaterally atomically flat surfaces (Rq <= 0.3 nm), and bulk-diamond-like crystallinity. Color centers are synthesized via both implantation and in-situ overgrowth incorporation. Within 110 nm thick membranes, individual germanium-vacancy (GeV-) centers exhibit stable photoluminescence at 5.4 K and average optical transition linewidths as low as 125 MHz. The room temperature spin coherence of individual nitrogen-vacancy (NV-) centers shows Ramsey spin dephasing times (T2*) and Hahn echo times (T2) as long as 150 us and 400 us, respectively. This platform enables the straightforward integration of diamond membranes that host coherent color centers into quantum technologies.
description: 50 pages, 13 figures
Is there Quark Matter in (Low-Mass) Pulsars?
Creators: name: Sagert, Irina
name: Pagliara, Giuseppe
name: Hempel, Matthias
name: Schaffner-Bielich, Jürgen
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The effect of the QCD phase transition is studied for the mass-radius relation of compact stars and for hot and dense matter at a given proton fraction used as input in core-collapse supernova simulations. The phase transitions to the 2SC and CFL color superconducting phases lead to stable hybrid star configurations with a pure quark matter core. In supernova explosions quark matter could be easily produced due to $β$-equilibrium, small proton fractions and nonvanishing temperatures. A low critical density for the phase transition to quark matter is compatible with present pulsar mass measurements.
description: 4 pages, 3 figures, talk given at the QM2008 conference, Jaipur, India, February 4-10, 2008, JPG in press
Gewässerversauerung durch Säuredeposition in Deutschland : Entwicklung und aktueller Stand
Creators: name: Bittersohl, Jochen
Publisher: name: Bundesanstalt für Gewässerkunde, Koblenz
Year: 2014
Subjects: subject: Water resources research

description: Hydrologie und Wasserbewirtschaftung / BfG – Jahrgang: 58.2014,5 - ISSN 1439-1783
Optical Study of LaO_0.9F_0.1FeAs: Evidence for a Weakly Coupled Superconducting State
Creators: name: Drechsler, S. -L.
name: Grobosch, M.
name: Koepernik, K.
name: Behr, G.
name: Koehler, A.
name: Werner, J.
name: Kondrat, A.
name: Leps, N.
name: Hess, Ch.
name: Klingeler, R.
name: Schuster, R.
name: Buechner, B.
name: Knupfer, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have studied the reflectance of the recently discovered superconductor LaO_0.9F0.FeAs in a wide energy range from the far infrared to the visible regime. We report on the observation of infrared active phonons, the plasma edge (PE) and possible interband transitions. On the basis of this data and the reported in-plane penetration depth lambda_L(0) about 254 nm [H. Luetkens et al., Phys. Rev. Lett. v. 101, 0970009 (2008)] a disorder sensitive relatively small value of the total electron electron-boson coupling constant lambda_tot=lambda_e-ph+lambda_e-sp ~ 0.6 +- 0.35 can be estimated adopting an effective single-band picture.
description: Changed title, updated references, final published version
Modelling ultra-fine structure in dark matter halos
Creators: name: Fantin, Daniele S. M.
name: Merrifield, Michael R.
name: Green, Anne M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Various laboratory-based experiments are underway attempting to detect dark matter directly. The event rates and detailed signals expected in these experiments depend on the dark matter phase space distribution on sub-milliparsec scales. These scales are many orders of magnitude smaller than those that can be resolved by conventional N-body simulations, so one cannot hope to use such tools to investigate the effect of mergers in the history of the Milky Way on the detailed phase-space structure probed by the current experiments. In this paper we present an alternative approach to investigating the results of such mergers, by studying a simplified model for a merger of a sub-halo with a larger parent halo. With an appropriate choice of parent halo potential, the evolution of material from the sub-halo can be expressed analytically in action-angle variables, so it is possible to obtain its entire orbit history very rapidly without numerical integration. Furthermore by evolving backwards in time, we can obtain arbitrarily-high spatial resolution for the current velocity distribution at a fixed point. Although this model cannot provide a detailed quantitative comparison with the Milky Way, its properties are sufficiently generic that it offers qualitative insight into the expected structure arising from a merger at a resolution that cannot be approached with full numerical simulations. Preliminary results indicate that the velocity-space distribution of dark matter particles remains characterized by discrete and well-defined peaks over an extended period of time, both for single and multi-merging systems, in contrast to the simple smooth velocity distributions sometimes assumed in predicting laboratory experiment detection rates.
description: 6 pages, 6 figures, accepted for publication in MNRAS
Economic Effects of Federal Regulation of the Minneapolis-St. Paul Fluid Milk Market
Creators: name: Swantz, Alexander
name: Swantz, Alexander
Publisher: name: Unknown
Year: 1952
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business

description: This study was designed to provide an economic analysis of the effect of Federal milk regulatory programs on the marketing of fluid milk and its products in the Minneapolis-St. Paul, Minn., marketing area. Since 1933, the Federal Government, through the medium of milk marketing agreements, licenses, and orders, has played an increasingly important role in the pricing of milk that is marketed in the major fluid milk consumption centers. As of December 1950, 39 markets were regulated by Federal milk orders issued by the Secretary of Agriculture under authority delegated to him by Congress and upheld by the U. S. Supreme Court. Moreover, the regulatory program is an expanding one, requests being continually received from additional markets for milk orders to replace, modify, or strengthen existing price-determining methods. The transition toward governmental regulation of fluid milk markets has progressed far enough to provide a basis for appraising the effects of these regulatory programs on the marketing structure for fluid milk and its products.
Application of the Alchemical Transfer and Potential of Mean Force Methods to the SAMPL8 Host-Guest Blinded Challenge
Creators: name: Azimi, Solmaz
name: Wu, Joe Z.
name: Khuttan, Sheenam
name: Kurtzman, Tom
name: Deng, Nanjie
name: Gallicchio, Emilio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We report the results of our participation in the SAMPL8 GDCC Blind Challenge for host-guest binding affinity predictions. Absolute binding affinity prediction is of central importance to the biophysics of molecular association and pharmaceutical discovery. The blinded SAMPL series have provided an important forum for assessing the reliability of binding free energy methods in an objective way. In this blinded challenge, we employed two binding free energy methods, the newly developed alchemical transfer method (ATM) and the well-established potential of mean force (PMF) physical pathway method, using the same setup and force field model. The calculated binding free energies from the two methods are in excellent quantitative agreement. Importantly, the results from the two methods were also found to agree well with the experimental binding affinities released subsequently, with an $R^2$ of 0.89 (ATM) and 0.83 (PMF). Given that the two free energy methods are based on entirely different thermodynamic pathways, the close agreement between the results from the two methods and their general agreement with the experimental binding free energies are a testament to the high quality achieved by theory and methods. The study provides further validation of the novel ATM binding free energy estimation protocol and it paves the way to further extensions of the method to more complex systems.
Engineering dynamical couplings for quantum thermodynamic tasks
Creators: name: Carrega, Matteo
name: Cangemi, Loris Maria
name: De Filippis, Giulio
name: Cataudella, Vittorio
name: Benenti, Giuliano
name: Sassetti, Maura
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Describing the thermodynamic properties of quantum systems far from equilibrium is challenging, in particular when the system is strongly coupled to its environment, or when memory effects cannot be neglected. Here, we address such regimes when the system-baths couplings are periodically modulated in time. We show that the couplings modulation, usually associated to a purely dissipative effect when done nonadiabatically, can be suitably engineered to perform thermodynamic tasks. In particular, asymmetric couplings to two heat baths can be used to extract heat from the cold reservoir and to realize an ideal heat rectifier, where the heat current can be blocked either in the forward or in the reverse configuration by simply tuning the frequency of the couplings modulation. Interestingly, both effects take place in the low-temperature, quantum non Markovian regime. Our work paves the way for the use of optimal control techniques for heat engines and refrigerators working in regimes beyond standard approaches.
description: 19 pages, 7 figures
Recurrence properties of unbiased coined quantum walks on infinite $d$-dimensional lattices
Creators: name: Stefanak, Martin
name: Kiss, Tamas
name: Jex, Igor
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Pólya number characterizes the recurrence of a random walk. We apply the generalization of this concept to quantum walks [M. Štefaňák, I. Jex and T. Kiss, Phys. Rev. Lett. \textbf{100}, 020501 (2008)] which is based on a specific measurement scheme. The Pólya number of a quantum walk depends in general on the choice of the coin and the initial coin state, in contrast to classical random walks where the lattice dimension uniquely determines it. We analyze several examples to depict the variety of possible recurrence properties. First, we show that for the class of quantum walks driven by independent coins for all spatial dimensions, the Pólya number is independent of the initial conditions and the actual coin operators, thus resembling the property of the classical walks. We provide an analytical estimation of the Pólya number for this class of quantum walks. Second, we examine the 2-D Grover walk, which exhibits localisation and thus is recurrent, except for a particular initial state for which the walk is transient. We generalize the Grover walk to show that one can construct in arbitrary dimensions a quantum walk which is recurrent. This is in great contrast with the classical walks which are recurrent only for the dimensions $d=1,2$. Finally, we analyze the recurrence of the 2-D Fourier walk. This quantum walk is recurrent except for a two-dimensional subspace of the initial states. We provide an analytical formula of the Pólya number in its dependence on the initial state.
The optimal approximation of qubit states with limited quantum states
Creators: name: Zhang, Li-qiang
name: Yu, Deng-hui
name: Yu, Chang-shui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Measuring the closest distance between two states is an alternative and significant approach in the resource quantification, which is the core task in the resource theory. Quite limited progress has been made for this approach even in simple systems due to the various potential complexities. Here we analytically solve the optimal scheme to find out the closest distance between the objective qubit state and all the possible states convexly mixed by some limited states, namely, to optimally construct the objective qubit state using the quantum states within any given state set. In particular, we find the least number of (not more than four) states within a given set to optimally construct the objective state and also find that any state can be optimally established by at most four quantum states of the set. The examples in various cases are presented to verify our analytic solutions further.
description: 6 figures
Quark anomalous magnetic moment and its effects on the $ρ$ meson properties
Creators: name: Xing, Zanbin
name: Raya, Khépani
name: Chang, Lei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A symmetry-preserving treatment of mesons, within a Dyson-Schwinger and Bethe-Salpeter equations approach, demands an interconnection between the kernels of the quark gap equation and meson Bethe-Salpeter equation. Appealing to those symmetries expressed by the vector and axial-vector Ward-Green-Takahashi identitiges (WGTI), we construct a two-body Bethe-Salpeter kernel and study its implications in the vector channel; particularly, we analyze the structure of the quark-photon vertex, which explicitly develops a vector meson pole in the timelike axis and the quark anomlaous magnetic moment term, as well as a variety of $ρ$ meson properties: mass and decay constants, electromagnetic form factors, and valence-quark distribution amplitudes.
description: 12 pages, 5 figures
Exploring Pure Spinor String Theory on AdS_4 x CP^3
Creators: name: Bonelli, Giulio
name: Grassi, Pietro Antonio
name: Safaai, Houman
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we formulate the pure spinor superstring theory on AdS_4 x CP^3. By recasting the pure spinor action as a topological A-model on the fermionic supercoset Osp(6|4)/SO(6)xSp(4) plus a BRST exact term, we prove the exactness of the sigma-model. We then give a gauged linear sigma-model which reduces to the superstring in the limit of large volume and we study its branch geometry in different phases. Moreover, we discuss possible D-brane boundary conditions and the principal chiral model for the fermionic supercoset.
description: 26 pages, typos corrected, references added
Estimation of the Radial Scale Length and Vertical Scale Height of the Galactic Thin Disk from Cepheids
Creators: name: Bobylev, V. V.
name: Bajkova, A. T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Up-to-date data on 2214 classical Cepheids have been used. The model of an exponential matter density distribution in the Galactic thin disk has been applied. New estimates of the radial disk scale length $h_R,$ the distance of the Sun from the symmetry plane $z_\odot$, and the vertical disk scale height $h_z$ have been obtained. Based on samples of 1087 Cepheids younger than 120 Myr and 1127 Cepheids older than 120 Myr, we have found $h_R=2.30\pm0.09$ kpc and $h_R=1.96\pm0.12$ kpc, respectively. It has turned out that an unambiguous estimate of $h_R$ cannot be obtained from their overall radial distribution. However, we have constructed the radial distribution of 806 Cepheids of different ages at the time of their birth from which we have found $h_R=2.36\pm0.24$ kpc. We show that $h_z$ depends strongly on the age of stars. For example, from 705 Cepheids younger than 120 Myr with heliocentric distances $r<6$ kpc we have found $z_\odot=-17\pm4$ pc and $h_z=75\pm5$ pc. From 393 Cepheids older than 120 Myr at $r<6$ kpc, we have found $z_\odot=-39\pm11$ pc and $h_z=131\pm10$ pc.
description: 13 pages, 8 figures, 2 tables
Structural approximations to positive maps and entanglement breaking channels
Creators: name: Korbicz, J. K.
name: Almeida, M. L.
name: Bae, J.
name: Lewenstein, M.
name: Acin, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Structural approximations to positive, but not completely positive maps are approximate physical realizations of these non-physical maps. They find applications in the design of direct entanglement detection methods. We show that many of these approximations, in the relevant case of optimal positive maps, define an entanglement breaking channel and, consequently, can be implemented via a measurement and state-preparation protocol. We also show how our findings can be useful for the design of better and simpler direct entanglement detection methods.
description: 18 pages, 3 figures
The best approximation of a given qubit state with the limited pure-state set
Creators: name: Zhang, Li-qiang
name: Yu, Deng-hui
name: Yu, Chang-shui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The preparation of quantum states lies at the foundation in the quantum information processing. The convex mixing of some existing quantum states is one of the effective candidate. In this paper, we mainly study how a target quantum state can be optimally prepared by not more than three given pure states. The analytic optimal distance based on the fidelity is found. We also show that the preparation with more than four states can be essentially converted to the case with not more than four states, which can be similarly solved as the case with three states. The validity is illustrated by the comparison of our analytical and numerical results.
description: 18 pages