cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Privacy preserving distributed data processing and game theoretic methods for data utility and privacy tradeoffs
Creators: name: Wu, Nan
Publisher: name: Macquarie University
Year: 2022
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: In this thesis, we focus on differential privacy and the trade-off between privacy level and accuracy of shared databases. For differential privacy, the Laplace mechanism is commonly utilised, for which the choice of value for a privacy parameter ε, also known as the privacy budget, plays a key role in the trade-off between privacy level and accuracy. We aim to build a game-theoretical model of choosing this privacy budget ε, while optimising the utility of the shared databases to which the differential privacy mechanism is applied. In this thesis, we consider differentially private queries applied in the context of two different models. The first model is an information-theory based query system using a discrete Laplace mechanism.The utility and leakage are quantified by information theory with min-entropy between original information, real answer and reported answer in the system. The second model is based on data analysis with privacy-aware machine learning using differentially-private gradient queries. We quantify the quality of the trained model by fitness cost, which is a function of differential-privacy parameters and the size of the distributed datasets, to capture the trade-off between privacy and utility by machine learning. Then, game theory is used to analyse the utility-leakage tradeoffs for both of these two models respectively
Complex statistics in Hamiltonian barred galaxy models
Creators: name: Bountis, Tassos
name: Manos, Thanos
name: Antonopoulos, Chris
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use probability density functions (pdfs) of sums of orbit coordinates, over time intervals of the order of one Hubble time, to distinguish weakly from strongly chaotic orbits in a barred galaxy model. We find that, in the weakly chaotic case, quasi-stationary states arise, whose pdfs are well approximated by $q$-Gaussian functions (with $1
description: 14 pages, 9 figures, submitted for publication
Resource allocation schemes for next generation wireless communication systems
Creators: name: Phuyal, Umesh
Publisher: name: University of British Columbia
Year: 2012

description: Recent studies have indicated that spectrum scarcity in next generation wireless networks is inevitable due to the surge of mobile communication usage which offers the capability of instant access to users’ data and multimedia content anywhere anytime. Demand of mobile data traffic is found to have doubled within a year, and is expected to grow by 15 times in about five years. Fulfilling such mounting demand with the limited radio resources is a huge challenge for next generation wireless communication systems. Moreover, meeting the diverse quality of service (QoS) requirements of various types of user applications is indispensable. To tackle these challenges and to improve the spectral efficiency, radio resource management needs to be optimized for various novel systems such as relay-based cooperative transmission technique and opportunistic spectral utilization using cognitive radio (CR) technology. In addition to spectral efficiency, effective resource allocation methods need to be designed to improve the energy efficiency of such systems to achieve sustainable green communication. In this thesis, we investigate performance of certain resource allocation techniques in next generation wireless communication systems through analytical modeling and propose improved solutions using results from these models and simulations. First, we analyze the performance of resource allocation schemes for guaranteed QoS provisioning in a relay-based cooperative communication system. We introduce novel methods for precoder design for multi-antenna source and relay stations employing joint zero-forcing method. We design various schemes to allocate available transmit power to the source and relay(s) in a spectrally efficient manner. Next, we study the performance of resource allocation schemes for multicarrier multiple-input multiple-output (MIMO)-based CR system. We propose an optimal power allocation scheme for such system considering the practical CR constraints. Finally, we investigate the issues and challenges in enabling green communication in next generation wireless communication systems. We propose energy-efficient resource allocation method for guaranteed QoS provisioning by employing relay-based cooperative communication. We also analyze the intrinsic trade-off between energy and spectral efficiency using multi-objective optimization approach. For all of the proposed algorithms and schemes, we also present extensive simulation-based results for comparison with methods existing in the literature.
Gauge-invariant variables in general-relativistic perturbations: globalization and zero-mode problem
Creators: name: Nakamura, Kouji
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: An outline of a proof of the local decomposition of linear metric perturbations into gauge-invariant and gauge-variant parts on an arbitrary background spacetime is briefly explained. We explicitly construct the gauge-invariant and gauge-variant parts of the linear metric perturbations based on some assumptions. We also point out the zero-mode problem is an essential problem to globalize of this decomposition of linear metric perturbations. The resolution of this zero-mode problem implies the possibility of the development of the higher-order gauge-invariant perturbation theory on an arbitrary background spacetime in a global sense.
description: (v1) 16 pages, no figure; (v2) 9 pages, no figure. Compactified for "2012 Awards for Essays on Gravitation" promoted by Gravity Research Foundation. References are deleted. no ingredients is changed. This version received Honorable Mention for 2012
A parallel algorithm for incremental stereo matching on SIMD machines
Creators: name: Laine, Andrew F.
name: Roman, Gruia-Catalin
Publisher: name: Columbia University
Year: 1991
Subjects: Medicine
Biomedical engineering

description: An effort has been made to develop a robust high-speed stereo matcher by exploiting parallel algorithms executing on general-purpose SIMD machines. This approach is based on several existing techniques dealing with the classification and evaluation of matches, the application of ordering constraints, and relaxation-based matching. The techniques have been integrated and reformulated in terms of parallel execution on a theoretical SIMD machine. An ideal machine topology for executing this parallel algorithm is identified through complexity analysis. Feasibility is demonstrated by implementation on a commercially available SIMD machine, and its performance is compared with that of the idealized machine. Sample results are shown for real and synthetic stereo pairs.
Ozsváth-Szabó invariants of contact surgeries
Creators: name: Golla, Marco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We give new tightness criteria for positive surgeries along knots in the 3-sphere, generalising results of Lisca and Stipsicz, and Sahamie. The main tools will be Honda, Kazez and Matic's, Ozsvath and Szabo's Floer-theoretic contact invariants. We compute the Ozsvath and Szabo's invariant of positive contact surgeries along Legendrian knots in the 3-sphere in terms of the classical invariants of the knot. We also combine a Legendrian cabling construction with contact surgeries to get results about rational contact surgeries.
description: 55 pages, 15 figures; some references have been updated, and the exposition has been improved
Paula Blackton
Creators: name: Howard, Cameron
Publisher: name: Columbia University
Year: 2013
Subjects: Women in the motion picture industry
Motion pictures
Silent films

description: Paula Hilburn, also known as Paula Dean, was an actress, writer, director, and costume designer at the Vitagraph Company. She acted in eight films, wrote seven, directed one, and designed the costumes for three. Her earliest credit is her role as Lady Mary in Vitagraph’s Monsieur Beaucaire: The Adventures of a Gentleman of France (1905), opposite Vitagraph company cofounder J. Stuart Blackton as the wicked Duke. According to Marian Constance Blackton, J. Stuart Blackton’s daughter by his first wife, Dean and Blackton’s intimacy on screen carried over into real life. J. Stuart Blackton married Paula Dean in 1906 on the same day his divorce to his first wife became official (Trimble 26). They had a daughter, Violet Virginia, in 1910 and a son, Charles Stuart, in 1914. Marian Contsance Blackton remembers her stepmother as a “handsome, dynamic, passionate extrovert” (27) with an “ear as well as an eye for elegance.” Further, she claims that it was Paula who persuaded J. Stuart Blackton to call Vitagraph’s place of business a “studio,” rather than a “factory” (29).
Higher dimensional charged BTZ-like wormhole
Creators: name: Hendi, S. H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is known that traversable wormhole can exist in General Relativity only if its throat contains some exotic matter. In this paper, we obtain $(2+1)$-dimensional (horizonless) charged magnetic brane without (curvature) singularity. Then, we consider a nontrivial local transformation to grant a global rotation to spacetime. After that, we generalize magnetic brane to higher dimensional solutions and use the cut-and-paste method to construct higher dimensional charged BTZ-like rotating wormholes such a way that they reduce to charged magnetic BTZ solution in three dimensions, exactly. We also show that charged BTZ-like wormhole supported by the exotic matter at its throat $r=r_{+}$. Finally, we calculate the conserved quantities of the charged BTZ-like wormhole such as mass, angular momentum and electric charge density, and show that the electric charge depends on the rotation parameters, interestingly, and the static wormhole does not have a net electric charge density.
description: 13 pages with one eps figure
From corporate to connected : resisting food system distancing in India and Canada
Creators: name: Rideout, Karen Lynne
Publisher: name: University of British Columbia
Year: 2012

description: The mainstream western food system is built on industrial production, processing, packaging, and distribution of highly processed food products that are detrimental to dietary, social, and ecological health. This unhealthy food system is characterized by a growing physical and conceptual distance between the production and consumption of food. Although distancing is often cited as a problem within the industrial food system, little is known about how it manifests in people’s lives or how best to address the problem of distancing in the food system. By examining the perspectives and motivations of people who are engaged in resisting distancing, this research highlights the meaning and value of food in their lives and shows how a focus on the intrinsic value of food can support healthy food systems change. This study examined how individuals in India and Canada resisted food system distancing, how they understood the problem of distancing, and assessed their motivations to resist. Thirty-seven semi-structured interviews were conducted in a qualitative, cross-cultural comparative study. Distancing and industrialization were seen as mutually supportive phenomena that concentrate power in middle spaces occupied by large corporations, usually to the detriment of individual producers and consumers of food. Although resisters in India and Canada were experiencing different levels of food system industrialization, participants in both countries felt that industrialization contributed to changes in social norms and individual values which, once normalized, facilitated further distancing. The primary motivation of the research participants was a belief that food has intrinsic or sacred value. Resisters in India used more explicitly spiritual language, but people in both countries described how recognition of the intrinsic value of food provided a source of deep spiritual meaning in their lives. Based on the interpretations and motivations of these resisters, this study concludes that there is a need for a paradigm shift in how food is conceptualized in mainstream society. This would require a broad, systemic approach designed to enable recognition of food’s intrinsic value and support meaningful connections around food without codifying ideological visions of a singular “right” kind of food system.
Jessica Elvira Borthwick
Creators: name: McKernan, Luke
Publisher: name: Columbia University
Year: 2013
Subjects: Women in the motion picture industry
Motion pictures
Silent films

description: Jessica Borthwick, named Jessie at birth, is an unusual figure in early film history. In 1913 she took it upon herself to record the war between the Ottoman Empire and the Balkan states—Greece, Bulgaria, Serbia, Montenegro—through motion pictures and still photography. An interview she gave to a film trade paper, the Bioscope, has burnished an image of an intrepid adventurer whose exploits overturn the traditional history of war filming as well as the early documentary film (625). Borthwick was undoubtedly an enterprising figure of varied and sometimes remarkable interests, but her foray into filmmaking was brief.
Random attractors for degenerate stochastic partial differential equations
Creators: name: Gess, Benjamin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37L55, 60H15 (Primary) 76S05, 35J92, 35K57 (Secondary)

description: We prove the existence of random attractors for a large class of degenerate stochastic partial differential equations (SPDE) perturbed by joint additive Wiener noise and real, linear multiplicative Brownian noise, assuming only the standard assumptions of the variational approach to SPDE with compact embeddings in the associated Gelfand triple. This allows spatially much rougher noise than in known results. The approach is based on a construction of strictly stationary solutions to related strongly monotone SPDE. Applications include stochastic generalized porous media equations, stochastic generalized degenerate p-Laplace equations and stochastic reaction diffusion equations. For perturbed, degenerate p-Laplace equations we prove that the deterministic, infinite dimensional attractor collapses to a single random point if enough noise is added.
description: 34 pages; The final publication is available at http://link.springer.com/article/10.1007%2Fs10884-013-9294-5
Agricultural water management scenarios in the Mkindo watershed Wami basin, Tanzania
Creators: name: Bruin, Annemarieke De
name: Cinderby, Steve
name: Mbilinyi, Boniface
name: Mahoo, Henry
name: Barron, Jennie
Publisher: name: Gates Open Research
Year: 2019

description: Agricultural water management scenarios in the Mkindo watershed Wami basin, Tanzania
Methods for the synthesis and purification of polycycloalkane candidates for photolithography immersion fluids at 193 nm: requirements for removal of oxygen
Creators: name: LÃ³pez-Gejo, Juan
name: Kunjappu, Joy T.
name: Conley, Will
name: Zimmerman, Paul
name: Turro, Nicholas J.
Publisher: name: Columbia University
Year: 2007
Subjects: subject: Chemistry
subject: Chemical engineering
subject: FOS: Chemical engineering

description: Cycloalkanes are candidates for immersion fluids because of their potential for low absorption in the 193-nm region and for a high refractive index (RI). We have developed an empirical correlation between refractive index and density of alkanes, which allows a prediction of the best candidates for immersion fluids based on the alkane structure. In particular, the correlation reveals that polycycloalkanes such as perhydrophenanthrene (PHPh) and perhydrodropyrene (PHPy), which have a higher RI than linear or cyclic alkanes, will be excellent candidates for immersion fluids at 193 nm. Therefore, PHPh and PHPy were synthesized by exhaustive hydrogenation of phenanthrene and pyrene. However, methods for the purification of the synthesized and commercial alkanes such as cyclodecane (CYD), cyclohexane (CYX), pentane (PNT), and decalin (DEC) are required in order to determine the actual absorption of candidates at 193 nm. The presence of an absorbing impurity at 193  nm can cause the premature elimination of otherwise excellent potential candidates. A rather subtle impurity is molecular oxygen, which does not itself absorb at 193 nm, but which forms complexes with alkanes that do absorb at 193 nm. In this case, the "impurity" is readily eliminated by simple purging with nitrogen or argon gas.
Cyclaspis longicaudata SARS 1865
Creators: name: Corbera, Jordi
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Cumacea
Bodotriidae
Cyclaspis
Cyclaspis longicaudata

description: CYCLASPIS LONGICAUDATA SARS, 1865 Material examined: New Caledonia, BIOCAL, stn CP57, 23°43.26′S, 166°58.06′E, 1490–1620 m, 1.ix.1985, 1 preadult female, 1 juvenile, 1 manca (MNHN-Cu1086); stn DS59, 23°56.21′S, 166°41.10′E, 2650 m, 2.ix.1985, 1 preadult male, 1 preadult female, 1 juvenile (MNHN-Cu1087). Diagnosis: Carapace globose and smooth without ridges or tubercles; pseudorostral lobes meeting just in front of the eyelobe. Uropods as long as pleonite 6, peduncle half length than unarmed rami. Remarks: Specimens agree with the description of Cyclaspis longicaudata Sars, 1865 a previously known from the North Atlantic, the Mediterranean and the south-west Atlantic. Comparison of the present material with specimens from the Bay of Biscay (north-eastern Atlantic) and eastern Mediterranean reveals no significant differences between them. Day (1978) assigned the material collected off the South African coast between 460 and 1300 m depth to Cyclaspis spectabilis Zimmer, 1908. However, no specimen has the transverse suture across the carapace, diagnostic in C. spectabilis and neither has the plumose setae on the inner margin of the uropod exopod. Without these features, the South African material is closely related to C. longicaudata but Day (1978) pointed out the greater length of the uropod peduncle as a main difference. However, in her description she mentioned that pleonite 6 is ‘more than twice length of peduncle of uropods’ and ‘rami subequal in length, about twice length of peduncle’. Both statements allow this material to be included within the range of variation of C. longicaudata (Fig. 13). Cyclaspis longicaudata may have a wider distribution than the south-eastern Atlantic, the Indian Ocean and the west Pacific or, conversely, comprises a group of sibling species that only a molecular analysis will be able to separate.
description: Published as part of Corbera, Jordi, 2008, Deep-sea Bodotriidae (Crustacea: Cumacea) from New Caledonia, Fiji and Indonesia, pp. 227-254 in Zoological Journal of the Linnean Society 152 (2) on page 241, DOI: 10.1111/j.1096-3642.2007.00371.x, http://zenodo.org/record/5447155
description: {"references": ["Sars GO. 1865. Om den aberrante Kerbsdyrgruppe Cumacea og dens nordiske arter. Forhandlinger i Videnskabs- Selskabet i Christiania 1864: 128 - 208.", "Day J. 1978. South African Cumacea. Part 2. Family Bodotriidae, Subfamily Bodotriinae. Annals of the South African Museum 75: 159 - 290.", "Zimmer C. 1908. Die Cumaceen der Duetschen Tiefsee- Expedition. Wissenschaftliche Ergebnisse der Duetschen Tiefsee-Expedition auf dem Dampfer ' Valdivia' 1898 - 1899 8: 155 - 196."]}
Throughput Maximization for the Gaussian Relay Channel with Energy Harvesting Constraints
Creators: name: Huang, Chuan
name: Zhang, Rui
name: Cui, Shuguang
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper considers the use of energy harvesters, instead of conventional time-invariant energy sources, in wireless cooperative communication. For the purpose of exposition, we study the classic three-node Gaussian relay channel with decode-and-forward (DF) relaying, in which the source and relay nodes transmit with power drawn from energy-harvesting (EH) sources. Assuming a deterministic EH model under which the energy arrival time and the harvested amount are known prior to transmission, the throughput maximization problem over a finite horizon of $N$ transmission blocks is investigated. In particular, two types of data traffic with different delay constraints are considered: delay-constrained (DC) traffic (for which only one-block decoding delay is allowed at the destination) and no-delay-constrained (NDC) traffic (for which arbitrary decoding delay up to $N$ blocks is allowed). For the DC case, we show that the joint source and relay power allocation over time is necessary to achieve the maximum throughput, and propose an efficient algorithm to compute the optimal power profiles. For the NDC case, although the throughput maximization problem is non-convex, we prove the optimality of a separation principle for the source and relay power allocation problems, based upon which a two-stage power allocation algorithm is developed to obtain the optimal source and relay power profiles separately. Furthermore, we compare the DC and NDC cases, and obtain the sufficient and necessary conditions under which the NDC case performs strictly better than the DC case. It is shown that NDC transmission is able to exploit a new form of diversity arising from the independent source and relay energy availability over time in cooperative communication, termed "energy diversity", even with time-invariant channels.
description: appear in IEEE Journal on Selected Areas in Communications, special issue on theories and methods for advanced wireless relays
MOESM1 of Polymorphisms of TGFBR1, TLR4 are associated with prognosis of gastric cancer in a Chinese population
Creators: name: He, Bangshun
name: Xu, Tao
name: Pan, Bei
name: Pan, Yuqin
name: Wang, Xuhong
name: Dong, Jingwu
name: Sun, Huiling
name: Xu, Xueni
name: Liu, Xiangxiang
name: Wang, Shukui
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Evolutionary Biology
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1: Table S1. Information of enrolled genetic variations. Table S2. Clinical and demographic characteristics of enrolled participants.
Marian Constance Blackton
Creators: name: Howard, Cameron
Publisher: name: Columbia University
Year: 2013
Subjects: Women in the motion picture industry
Motion pictures
Silent films

description: Marian Blackton worked on over fifteen films during her short career as a scenarist and occasional actress. Her father, J. Stuart Blackton, one of the founders of the Vitagraph Company, directed all but two of her scenarios. Marian Blackton became her father’s script girl in 1921, and graduated to scenario writer in 1924. Most of her scenarios were dramas adapted from existing novels or plays.
title: Kaufpreise dürften wieder anziehen – Spekulative Preisblase kann sich wieder füllen: Interview
Creators: name: Kholodilin, Konstantin A.
name: Wittenberg, Erich
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2024

description: DIW Wochenbericht, 91 (2024), 51/52, S. 857
Texture Classification by Wavelet Packet Signatures
Creators: name: Laine, Andrew F.
name: Fan, Jian
Publisher: name: Columbia University
Year: 1993
Subjects: Medicine
Biomedical engineering

description: This correspondence introduces a new approach to characterize textures at multiple scales. The performance of wavelet packet spaces are measured in terms of sensitivity and selectivity for the classification of twenty-five natural textures. Both energy and entropy metrics were computed for each wavelet packet and incorporated into distinct scale space representations, where each wavelet packet (channel) reflected a specific scale and orientation sensitivity. Wavelet packet representations for twenty-five natural textures were classified without error by a simple two-layer network classifier. An analyzing function of large regularity (D20) was shown to be slightly more efficient in representation and discrimination than a similar function with fewer vanishing moments (D6) In addition, energy representations computed from the standard wavelet decomposition alone (17 features) provided classification without error for the twenty-five textures included in our study. The reliability exhibited by texture signatures based on wavelet packets analysis suggest that the multiresolution properties of such transforms are beneficial for accomplishing segmentation, classification and subtle discrimination of texture.
Exploring the perception of phonemic vowel length contrasts: evidence from infants and adults
Creators: name: Chen, Hui
Publisher: name: Macquarie University
Year: 2022
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: Infants tune into native sound categories as early as in their first year, but in order to understand the language, they must become aware of the phonemic function of the sounds as well. A number of studies have investigated infants’ phonemic awareness of consonant and vowel quality contrasts at the early word learning stage, however, there has been no research directly examining infants’ early understanding of phonemic vowel length contrasts in a language where vowel duration can signal word meaning alone, such as Japanese, Finnish, Arabic, and even Australian English. Since vowels can also vary in duration as a function of prosodic context, an investigation of how phonemic vowel length is acquired is essential for understanding early phonological development more generally.
 This thesis therefore focuses on the perception of phonemic vowel length contrasts. It is comprised of three studies, targeting three populations respectively: Japanese infants, Australian English infants, and bi-dialectal Australian English adults. The first study revealed that Japanese infants have developed awareness of phonemic vowel length contrasts by 18 months, which is probably related to the systematicity and robustness of the contrasts manifesting in the language. The second study showed that Australian English-learning infants have become sensitive to mispronunciations of phonemic vowel length by at least 24 months, possibly earlier than often thought. The third study indicated that native Australian English adults, who have had early exposure to another English dialect that does not have contrastive vowel length, might have established more flexible phonological categories of phonemic vowel length, compared to those without this early exposure.
 Taken together, the findings of this thesis suggest that the development of phonemic vowel length contrasts is tied to the systematicity and stability of these contrasts in the language being learned.
Wilson loops in Five-Dimensional Super-Yang-Mills
Creators: name: Young, Donovan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider circular non-BPS Maldacena-Wilson loops in five-dimensional supersymmetric Yang-Mills theory (d = 5 SYM) both as macroscopic strings in the D4-brane geometry and directly in gauge theory. We find that in the Dp-brane geometries for increasing p, p = 4 is the last value for which the radius of the string worldsheet describing the Wilson loop is independent of the UV cut-off. It is also the last value for which the area of the worldsheet can be (at least partially) regularized by the standard Legendre transformation. The asymptotics of the string worldsheet allow the remaining divergence in the regularized area to be determined, and it is found to be logarithmic in the UV cut-off. We also consider the M2-brane in AdS_7 x S^4 which is the M-theory lift of the Wilson loop, and dual to a "Wilson surface" in the (2,0), d = 6 CFT. We find that it has exactly the same logarithmic divergence in its regularized action. The origin of the divergence has been previously understood in terms of a conformal anomaly for surface observables in the CFT. Turning to the gauge theory, a similar picture is found in d = 5 SYM. The divergence and its coefficient can be recovered for general smooth loops by summing the leading divergences in the analytic continuation of dimensional regularization of planar rainbow/ladder diagrams. These diagrams are finite in 5 - epsilon dimensions. The interpretation is that the Wilson loop is renormalized by a factor containing this leading divergence of six-dimensional origin, and also subleading divergences, and that the remaining part of the Wilson loop expectation value is a finite, scheme-dependent quantity. We substantiate this claim by showing that the interacting diagrams at one loop are finite in our regularization scheme in d = 5 dimensions, but not for d greater than or equal to 6.
description: 1+18 pages, 3 figures. v2 added a reference and made minor cosmetic changes, JHEP version. v3 added generalization to arbitrary smooth, closed contours, added references. v4 added references and clarified discussion beneath eq. (23)
Cube Bonifant
Creators: name: Consuelo Pérez Solano, Rocío Del
Publisher: name: Columbia University
Year: 2013
Subjects: Women in the motion picture industry
Motion pictures
Silent films

description: Born in Mexico City in 1904, Cube Bonifant published her distinctive film criticism in newspapers and magazines throughout the early twentieth century. Her criticism covers the end of the silent film era, the transition from silent film to sound motion pictures, and the birth of the sound motion picture industry in Mexico. The need to learn more about the early days of film criticism—especially film criticism written by women—brings one to examine Bonifant’s work. While she was intent on attacking the Hollywood film industry, she had a journalist’s commitment to objectivity. Her colleagues such as Catalina D’Erzell criticized her for her biting, mocking style while at the same time praising her writing.
StabilizationOfThePVTOLUsingNonlinearFeedbackControl.slx
Creators: name: Flores, Jonathan
Publisher: name: figshare
Year: 2021
Subjects: subject: 90602 Control Systems, Robotics and Automation
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 91302 Automation and Control Engineering
subject: 90104 Aircraft Performance and Flight Control Systems
subject: FOS: Mechanical engineering
subject: 90407 Process Control and Simulation
subject: FOS: Chemical engineering
subject: 10203 Calculus of Variations, Systems Theory and Control Theory
subject: FOS: Mathematics

description: This paper presents a new control strategy for the well known problem of the PVTOL. The total thrust is computed using a non linear feedback compensation so that the altitude reaches the desired altitude. The horizontal position x is then controlled by choosing the orientation angle theta as a smooth saturation function of x and its derivative. A proof of convergence is presented using a Lyapunov approach. The proposed control strategy is successfully tested in numerical simulations.
Poster: Integration of Open Source electronic laboratory notebooks for the biomedical Research Data Management Framework at Göttingen Campus
Creators: name: Smolorz, Sabine Andrea
name: Mathes, Tilo
name: Kossen, Robert
name: Henke, Christian
name: Sax, Ulrich
name: Nussbeck, Sara
name: Kusch, Harald
Publisher: name: Zenodo
Year: 2025

description: In biomedical research the extensive primary documentation of laboratory materials and processes is an essential prerequisite of FAIR research data management approaches. This part of documentation is increasingly carried out digitally in electronic laboratory notebooks (ELN). As more and more measurement results in the laboratory are delivered in digital formats ELNs can serve as information hubs that cross-link various complementary metadata and data types with primary information by the researchers.

Starting in 2014, we implemented a productive ELN service (RSpace) as fundamental part of our framework for managing research data for biomedical consortia engaged in basic and translational research at the University Medical Center Göttingen and its partner institutions at the Göttingen Campus. RSpace facilitates metadata management and standardization for experimental resources and workflows, e.g. by advanced sharing, template, tagging, data integration, data export, and inventory functionalities. Originally started as proprietary software project RSpace code is now completely Open Source (https://github.com/rspace-os) which opens up a variety of possibilities regarding interoperability, modularity, and sustainability of the application. In addition to the ELN, our research data platform (RDP) framework consists of a complementary setup of various RDM tools (such as Göttingen Research Online (GRO), menoci, FAIRDOM-SEEK, and OMERO). All framework components provide persistent identification of digital objects as well as API capabilities enabling sustainable cross-linking of information between the systems. ELN and RDP development and training are performed in close cooperation with the Göttingen eResearch Alliance (https://www.eresearch.uni-goettingen.de/).
QuTiP: An open-source Python framework for the dynamics of open quantum systems
Creators: name: Johansson, J. R.
name: Nation, P. D.
name: Nori, Franco
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present an object-oriented open-source framework for solving the dynamics of open quantum systems written in Python. Arbitrary Hamiltonians, including time-dependent systems, may be built up from operators and states defined by a quantum object class, and then passed on to a choice of master equation or Monte-Carlo solvers. We give an overview of the basic structure for the framework before detailing the numerical simulation of open system dynamics. Several examples are given to illustrate the build up to a complete calculation. Finally, we measure the performance of our library against that of current implementations. The framework described here is particularly well-suited to the fields of quantum optics, superconducting circuit devices, nanomechanics, and trapped ions, while also being ideal for use in classroom instruction.
description: 16 pages, 12 figures
title: Preise am Wohnungsmarkt stabilisieren sich – Nachfrage hoch, Angebot weiter zu knapp
Creators: name: Kholodilin, Konstantin A.
name: Rieth, Malte
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2024
Subjects: subject: C32 Multiple or Simultaneous Equation Models: Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models
subject: E27 Macroeconomics: Consumption, Saving, Production, Employment, and Investment: Forecasting and Simulation: Models and Applications
subject: E32 Business Fluctuations; Cycles
subject: speculative house price bubbles
subject: explosive roots tests
subject: German cities and town

description: Der Immobilienmarkt in Deutschland hat sich wieder stabilisiert. Es entweicht noch Luft aus der nun seit einem Jahrzehnt währenden spekulativen Preisblase. Die Immobilienpreise sind im Laufe des Jahres 2024 in allen Segmenten und den meisten Regionen weiter gefallen: In über 150 Städten waren Baugrundstücke, Eigenheime und Eigentumswohnungen im laufenden Jahr im Durchschnitt um nominal fünf Prozent günstiger als vor einem Jahr. Besonders waren dies Baugrundstücke und Eigenheime in großen Städten, wo die Preise um bis zu sieben Prozent zurückgegangen sind. Die Mieten stiegen hingegen weiter, um nominal vier Prozent. Eine zögerliche Wende am Wohnungsmarkt deutet sich aber bereits an. Die durch Bevölkerungswachstum und die sich wieder verbessernden Finanzierungsbedingungen getriebene Nachfrage steht einer nach wie vor geringen Bautätigkeit gegenüber. Die Kaufpreise beginnen zu steigen. Die Politik ist daher dringend gefordert, mit öffentlicher Bautätigkeit und einer Vereinfachung der Verfahren und Vorschriften dem entgegenzusteuern.
description: DIW Wochenbericht, 91 (2024), 51/52, S. 847-856
Simulation of contaminates around the solid immersion lens in a near-field optical recording system
Creators: name: Terrell, Elon Jahdal
name: Higgs, C. Fred
Publisher: name: Columbia University
Year: 2007
Subjects: Materials science

description: Accurate predictions of contamination in next-generation optical storage drives are paramount when active gap control is employed. In near-field recording devices, the read/write interface can be on the order of 20-30 nm, which means that the gap could be quite susceptible to contamination. Predictive modeling approaches for studying the behavior of contaminates in nanoscale hydrodynamic interfaces are needed. Here, we present such a model. The interface consists of a flat disk surface translating under a solid immersion lens (SIL) of hemispherical geometry. We present the computational modeling simulation results for nano-scale contaminates around the near-field SIL. The simulation shows that the discrete contaminates actually circumnavigate the SIL/disk interface during operation. We identify and discuss the external influences on the discrete contaminate particle behavior.
Harriet Bloch
Creators: name: Granhøj, Birgit
name: Redvall, Eva N.
Publisher: name: Columbia University
Year: 2017
Subjects: Women in the motion picture industry
Motion pictures
Silent films

description: Harriet Bloch is regarded as the first professional female screenwriter in Denmark (Sundholm et al. 2012, 405) and as one of the most successful Danish screenwriters to this day (Schröder 2011). She had no formal training in writing, but picked up knowledge of films at the cinema where she could watch up to three films a day (Bloch 1962, n.p.). The idea of writing screenplays of her own came from watching Urban Gad’s classic silent film Afgrunden/The Abyss (1910) starring Asta Nielsen. Bloch figured that she would be able to write something of a similar quality, and she thus sent an unsolicited screenplay to the cinema owner and film producer Constantin Philipsen, who had opened Denmark’s first cinema, Kosmorama, in 1904. According to Bloch, Philipsen was not interested in her story because he only wanted films that were either really vulgar or really exciting and this was a romantic melodrama (1962, n.p.). However, Nordisk Film took an interest in the story, which became August Blom’s Hendes Ære/Lady Mary’s Love (1911). The film was presented as a play in fifty sections by “Mrs. Harriet Bloch” on the cover of the printed programme, which labelled it as part of an “art film series” (Redvall 2015, 268).
Comparison of global gridded precipitation products over a mountainous region of Africa
Creators: name: Dinku, Tufa
name: Connor, Stephen J.
name: Ceccato, Pietro N.
name: Ropelewski, Chester F.
Publisher: name: Columbia University
Year: 2008
Subjects: subject: Science--Social aspects
subject: Atmosphere
subject: Ecology
subject: FOS: Biological sciences

description: Five gridded monthly precipitation products are evaluated using a gauge network over complex topography in Africa. The global gridded products considered are produced by the Global Precipitation Climatology Center (GPCC), NOAA Climate Prediction Center (NOAA-CPC), and the Climate Research Unit at the University of East Anglia (UEA-CRU). Three different products from GPCC are available at multiple spatial resolutions: 0.5, 1 and 2.5° ; the NOAA-CPC product has a spatial resolution of 2.5° while that of UEA-CRU is 0.5° . Comparisons of the GPCC and UEA-CRU products are carried out at spatial resolutions of 0.5, 1 and 2.5° , while NOAA-CPC is compared with the other products only at 2.5° resolution. There is very strong agreement between the gridded global products and the reference raingauge data. Average correlation coefficients are about 0.95, 0.92, and 0.90 at 2.5, 1.0 and 0.5° spatial resolutions, respectively. Both systematic and random errors are reasonably low. The performance of these products is highest during the wettest season (Jun-Aug), and relatively poor during the dry season (Dec-Feb). The seasonal differences are more prominent at high resolution. These results are very encouraging, particularly, when considering the complex terrain of the validation site.
title: Der deutschen Wirtschaft geht es zurzeit nicht besonders gut: Interview
Creators: name: Dany-Knedlik, Geraldine
name: Wittenberg, Erich
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2024
Subjects: subject: Business cycle forecast
subject: economic outlook

description: DIW Wochenbericht, 91 (2024), 50, S. 840
Temperature and field dependence of thermally activated flux flow resistance in Bi2Sr2CaCu2O8+δ superconductor
Creators: name: Sharma, Devina
name: Kumar, Ranjan
name: Awana, V. P. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the temperature dependence of the resistivity as a function of magnetic field in superconducting transition (Tconset - TcR=0) region for different Bi2Sr2CaCu2O8+δ superconducting samples being synthesized using sol-gel method. The superconducting transition temperature (TcR=0) of the studied samples is increased from 32 K to 82K by simply increasing the final sintering temperature with an improved grains morphology. On the other hand, broadening of transition is increased substantially with decrease in sintering temperature; this is because Tconset is not affected much with grains morphology. Further broadening of the superconducting transition is seen under magnetic field, which is being explained on the basis of thermally activated flux flow (TAFF) below superconducting transition temperature (Tc). TAFF activation energy (U0) is calculated using the resistive broadening of samples in the presence of magnetic field. Temperature dependence of TAFF activation energy revealed linear temperature dependence for all the samples. Further, magnetic field dependence is found to obey power law for all the samples and the negative exponent is increased with increase in sintering temperature or the improved grains morphology for different Bi-2212 samples. We believe that the sintering temperature and the ensuing role of grain morphology is yet a key issue to be addressed in case of cuprate superconductors.
description: 17 pages text + Figs: comments/suggestions (awana@mail.nplindia.ernet.in)
Quantum lump dynamics on the two-sphere
Creators: name: Krusch, S.
name: Speight, J. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well known that the low-energy classical dynamics of solitons of Bogomol'nyi type is well approximated by geodesic motion in M_n, the moduli space of static n-solitons. There is an obvious quantization of this dynamics wherein the wavefunction evolves according to the Hamiltonian H_0 equal to (half) the Laplacian on M_n. Born-Oppenheimer reduction of analogous mechanical systems suggests, however, that this simple Hamiltonian should receive corrections including k, the scalar curvature of M_n, and C, the n-soliton Casimir energy, which are usually difficult to compute, and whose effect on the energy spectrum is unknown. This paper analyzes the spectra of H_0 and two corrections to it suggested by work of Moss and Shiiki, namely H_1=H_0+k/4 and H_2=H_1+C, in the simple but nontrivial case of a single CP^1 lump moving on the two-sphere. Here M_1=TSO(3), a noncompact kaehler 6-manifold invariant under an SO(3)xSO(3) action, whose geometry is well understood. The symmetry gives rise to two conserved angular momenta, spin and isospin. A hidden isometry of M_1 is found which implies that all three energy spectra are symmetric under spin-isospin interchange. The Casimir energy is found exactly on the zero section of TSO(3), and approximated numerically on the rest of M_1. The lowest 19 eigenvalues of H_i are found for i=0,1,2, and their spin-isospin and parity compared. The curvature corrections in H_1 lead to a qualitatively unchanged low-level spectrum while the Casimir energy in H_2 leads to significant changes. The scaling behaviour of the spectra under changes in the radii of the domain and target spheres is analyzed, and it is found that the disparity between the spectra of H_1 and H_2 is reduced when the target sphere is made smaller.
description: 35 pages, 3 figures
The contentious political economy of biofuels : transnational struggles over food, fuel, and the environment
Creators: name: Neville, Kathryn
Publisher: name: University of British Columbia
Year: 2012

description: The quintessential image of a farmer in a field summons to mind an industry at the heart of debates over land, environment, and food. A picture of an oil rig, silhouetted against the sky, conjures its own questions of progress, growth, and power. As agricultural products modified into energy commodities, biofuels—liquid fuels derived from plants—are located at the intersection of these industrial complexes, and, consequently, at the crux of these concerns. Over the course of a decade, starting in the early 2000s, public discourse over biofuels has spanned early optimism to uproar over food security to outcry over land appropriation. This project investigates why both the rules governing and the actual implementation of biofuels investments underwent such rapid and continuous revision. What, it asks, explains these seemingly-stochastic shifts? Why do state, society, and corporate actors not align into and remain part of more coherent pro- and anti-biofuels camps? And why, in spite of media reports of protests, campaigns, and lawsuits against biofuels projects, can we not identify consistent movements and counter-movements? Drawing on original fieldwork in coastal Kenya and Tanzania from 2010-2011, and triangulating field-based interview and observational findings with media reports, policy documents, and secondary literature, this dissertation argues that biofuels are challenging objects of contention for claim-makers and power-holders alike, for two reasons. First, their position at the junction of commercialized energy and agriculture implicates them in difficult-to-track, globalizing, and distant political economy relationships. Second, at the production level, biofuels are a diverse set of crops that affect local ecologies and livelihoods in geographically-specific ways, while in energy markets, they are a largely-unified fuel alternative. These differences across sectors make them difficult to promote, regulate, and resist. This dissertation proposes a framework of contentious political economy to analyze these complex claims and responses. The project brings together a dynamic, cyclical understanding of the capture and appropriation of identities, interests, and historical grievances with a political economy perspective on new market forces and commodities. Beyond biofuels, the project considers the social and environmental repercussions of the intersection of new resource economies with long-standing grievances.