cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fusing MODIS and AVHRR products to generate a global 1-km continuous NDVI time series covering four decades
Creators: name: Guan, Xiaobin
name: Shen, Huanfeng
name: Wang, Yuchen
name: Chu, Dong
name: Li, Xinghua
name: Yue, Linwei
name: Li, Wei
name: Liu, Xinxin
name: Zhang, Liangpei
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: Satellite normalized difference vegetation index (NDVI) time series, essential for ecological and environmental applications, is still limited by a trade-off between the spatiotemporal resolution and time coverage despite various global products. The Advanced Very High-Resolution Radiometer (AVHRR) instrument can provide the longest continuous time series since 1982, but with the drawback of coarse spatial resolution and poor data quality. To address this issue, a spatiotemporal fusion-based long-term NDVI product (STFLNDVI) since 1982 was generated in this study at a 1-km spatial resolution with monthly intervals, by fusing with the Moderate Resolution Imaging Spectroradiometer (MODIS) data. A multi-step processing fusion framework, containing temporal filtering, normalization, spatiotemporal fusion, and residual error correction, was employed to combine the superior characteristics of the two products, respectively. Simulated comparison with MODIS data and real-data assessments with true 1 km AVHRR data both confirm the ideal accuracy of the fusion product in spatial distribution and temporal variation, providing stable long-term results similar to MODIS data. We believe that the STFLNDVI product will be of great significance in characterizing the spatial patterns and long-term variations of global vegetation and the historical radiometric calibrations in
AVHRR data gaps around the Arctic and instrument differences between MODIS and AVHRR should be further considered in the future.
The Extreme Overabundance of Molybdenum in Two Metal-Poor Stars
Creators: name: Peterson, Ruth C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report determinations of the molybdenum abundances in five mildly to extremely metal-poor turnoff stars using five Mo II lines near 2000A. In two of the stars, the abundance of molybdenum is found to be extremely enhanced, as high or higher than the neighboring even-Z elements ruthenium and zirconium. Of the several nucleosynthesis scenarios envisioned for the production of nuclei in this mass range in the oldest stars, a high-entropy wind acting in a core-collapse supernova seems uniquely capable of the twin aspects of a high molybdenum overproduction confined to a narrow mass range. Whatever the details of the nucleosynthesis mechanism, however, this unusual excess suggests that very few individual nucleosynthesis events were responsible for the synthesis of the light trans-Fe heavy elements in these cases, an unexpected result given that both are only moderately metal-poor.
description: updated in v2, including text missing from the third-to-last paragraph in the published version
title: Estimating abundance and biomass of North Sea cod based on surveys with commercial fishing vessels
Creators: name: Wieland, Kai
name: Pedersen, Eva Maria F.
name: Olesen, Hans J.
name: Berg, Casper
name: Beyer, Jan E.
Publisher: name: ASC 2009 - Theme session L
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.A collaborative fishermen-biologists project on cod in the north-eastern central North Sea was started by the National Institute of Aquatic Resources at the Technical University of Denmark and the Danish Fishermen Association in summer 2006. Three commercial vessels representing different fishing methods participated in the study. The surveys with these vessels, which allowed fishing also on rough bottom and at ship wrecks, provided information on the distribution, abundance and size composition of North Sea cod in respect to bottom type, and for comparison with results from the International Bottom Trawl Survey (IBTS). In general, catch rates were higher on rough bottom than on smooth bottom, and considerable catches were made in areas where the IBTS reported low densities or no cod at all. This was in particular pronounced for cod of older ages. Scaling the commercial catch rates based on the ratio of IBTS indices for the study area to the entire North Sea suggests that spawning stock biomass and abundance of older cod may have increased faster in the past years than the present assessment indicates
Absolute value of the magnetic penetration depth and field profile in the Meissner state of exotic superconductors Yttrium barium copper oxide and Co-doped pnictide
Creators: name: Hossain, Md Masrur
Publisher: name: University of British Columbia
Year: 2012

description: One of the fundamental quantities of a superconductor is the magnetic penetration depth, λ, which is the characteristic length scale that a magnetic field penetrates into the surface of a superconductor while in the Meissner state. In the clean limit the absolute value of λ is directly related to the superfluid density ns via 1/λ² = μοe²ns/m∗ , where m∗ is the effective mass. Consequently, its variation as a function of temperature, doping and orientation are of central importance in testing microscopic theories of exotic superconductors. A low energy beam of spin polarized muons has recently been developed, at the Paul Scherrrer Institute, to directly measure λ in a superconductor. When a muon (μ+) decays, it emits a fast decay positron preferentially along the direction of its spin due to the parity violating decay. The time evolution of statistical average direction of the spin polarization of the muon ensemble depends sensitively on the local magnetic field which can be monitored as a function of the mean depth of implantation. In this way it is possible to measure the field profile near the surface of a superconductor and extract the magnetic penetration depth in a direct manner which is not otherwise possible with conventional bulk methods. In this thesis, accurate measurements of λ and its anisotropy (≡ λa /λb) have been made for three different oxygen (x = 6.52, 6.92 and 6.998) contents of YBa₂Cu₃O₆₊x as well as in Ba(Co₀.₀₇₄Fe₀.₉₂₆₎₂As₂. The measured values of λ and the in-plane anisotropies are considerably different from that reported in the literature, using less direct methods. The a – b anisotropy is surprisingly insensitive to x in YBa₂Cu₃O₆₊x . We observe an exponential decay of the magnetic field and corresponding supercurrent density deep inside the crystals. Small deviations from the London model are observed which indicate there is a suppression of the supercurrent density close to the surface. The measured (λ) values are also found to depart substantially from the Uemura relation Tcα 1/λ² .
MET: An Experimental System for Malicious Email Tracking
Creators: name: Bhattacharyya, Manasi
name: Hershkop, Shlomo
name: Eskin, Eleazar
Publisher: name: Columbia University
Year: 2002
Subjects: Computer science

description: Despite the use of state of the art methods to protect against malicious programs, they continue to threaten and damage computer systems around the world. In this paper we present MET, the Malicious Email Tracking system, designed to automatically report statistics on the flow behavior of malicious software delivered via email attachments both at a local and global level. MET can help reduce the spread of malicious software worldwide, especially self-replicating viruses, as well as provide further insight toward minimizing damage caused by malicious programs in the future. In addition, the system can help system administrators detect all of the points of entry of a malicious email into a network. The core of MET's operation is a database of statistics about the trajectory of email attachments in and out of a network system, and the culling together of these statistics across networks to present a global view of the spread of the malicious software. From a statistical perspective sampling only a small amount of traffic (for example, .1 %) of a very large email stream is sufficient to detect suspicious or otherwise new email viruses that may be undetected by standard signature-based scanners. Therefore, relatively few MET installations would be necessary to gather sufficient data in order to provide broad protection services. Small scale simulations are presented to demonstrate MET in operation and suggests how detection of new virus propagations via flow statistics can be automated.
title: Science-to-Management Pathways for Collaborative Herring Stock Survey Data: Using network analysis to track information flow and potential influence in fisheries management
Creators: name: Hartley, Troy W.
name: Glass, Christopher
Publisher: name: ASC 2009 - Theme session L
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.Herring in the Northwest Atlantic are not overfished and overfishing is not occurring. However concerns for the potential of localized depletion and negative impacts on other fisheries and economic sectors have led to a sequence of management plans and amendments in the U.S. in recent years. Stock assessments have been vital in these management deliberations and there are several sources of herring stock survey data in the Gulf of Maine and Georges Bank, including a collaborative industry-science acoustic survey and government-administered trawl surveys. A joint U.S.-Canadian technical committee of scientists conducts the stock assessment from these data. We first describe the stock survey approaches, including the outcome of a 2005 external peer review of the collaborative acoustic survey, and examine their use in the assessment process. Second, we use a network analysis methodology to map the communication patterns among participants in the development of a fisheries management plan (FMP). Individuals (nodes) and their connections (links) are spatially arranged in a network map based upon the communicative relationship among all individuals. We track the pathways through which the collaborativelyderived stock survey data flow into the stock assessment (science) and the FMP decision-making (management) process. We compare pathways for their communication efficacy in feeding stock survey information into science and management. The resulting map shows participants in the collaborative survey well connected to the stock assessment and fisheries management process, although not institutionalized and dependent upon key individual participants serving as bridgers between informational resources.
Altitudinal dependences of meteoclimatic conditions in the Great Alpine Region: from observations and idealized simulations to climate change projections
Creators: name: NAPOLI, ANNA
Publisher: name: Universit� degli studi di Genova
Year: 2022

description: Mountain environments are of a great importance in our lives, as they cover about 25% of the Earth?s surface, and all the population on the Earth depends on them directly or indirectly. Fresh water is important for the survival of humans and an important part is found in mountain settings, including glaciers, lakes, rivers. Mountains provide fresh water to more than half of the world?s population, for drinking and domestic use, agriculture, industry and hydropower production. Mountains provide
natural resources, they are a refuge for many species of flora and fauna, mountain environments have processes of resilience or adaptation to the negative factors of
climate change. At the same time, mountain regions are characterised by complex atmospheric dynamics that generate very local effects of larger scale variations, such
as global warming. Mountain ecosystems are particularly sensitive to the impacts of climate change and are being affected at a faster rate than other environments. Thus climate change is directly affecting mountain settings, but also all those who depend on them.
To shed further light on this important field, my research project deals with the study of the altitudinal dependencies of meteoclimatic conditions in the Great Alpine Region, one of the highest and most extensive mountain range system in Europe where both global and local anthropic activities impact it. To this goal, in my PhD research project at first I analyzed observational data to study the true representation of the status of atmospheric variables such as precipitation: the main goal was to shed light on the relationship between precipitation changes and elevation. Secondly, I worked with high resolution numerical simulations that allow to study with greater accuracy the underlying processes associated to air masses flow over complex orography areas: two distinct but complementing research topics have been tackled, one based on developing a better understanding of the climatic role that aerosols play in complex orography areas, and the other based on investigating the expected changes in climate over the Great Alpine Region with a greater emphasis in understanding changes with altitude.
Scale invariance and a gravitational model with non-eternal inflation
Creators: name: Herdeiro, Carlos
name: Hirano, Shinji
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We propose a 3 + 1 dimensional model of gravity which results in inflation at early times, followed by radiation- and matter-dominated epochs and a subsequent acceleration at late times. Both the inflation and late time acceleration are nearly de Sitter with a large hierarchy between the effective cosmological constants. There is no scalar field agent of inflation, and the transition from the inflation to the radiation-dominated period is smooth. This model is designed so that it yields, at the cost of giving up on Lorentz invariance in the gravitational sector, the Dirac-Born-Infeld type conformal scalar theory when the universe is conformally flat. It, however, resembles Einstein's gravity with the Gibbons-Hawking-York boundary term in weakly curved space-times.
description: 13 pages, 4 figures; revised version accepted in JCAP
Azimuthal Correlations in Top Pair Decays and The Effects of New Heavy Scalars
Creators: name: Barger, Vernon
name: Keung, Wai-Yee
name: Yencho, Brian
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the azimuthal correlations in the decay products of the top quark pair created in the process $gg \to t \tbar \to b \bbar \wplus \wminus$ calculated in leading-order QCD. We then discuss deviations in this distribution that could arise from New Physics contributions, focusing, in particular, on the case of a new heavy scalar coupling to the top quark and produced via the gluon fusion mechanism. Within this scenario we consider two cases: one in which the top quark is the only particle with a significant coupling to the scalar and another in which there are additional heavy fermions that modify the effective coupling of the scalar to gluons. We discuss the effects on the overall cross section and azimuthal correlations of the top quark decay products, with particular emphasis on the effect of interference between the QCD and New Physics contributions and on the existence of CP-nonconserving couplings.
description: 27 pages, 12 figures
A Mazandarani Account of the Babi Incident at Shaikh Tabarsi
Creators: name: Borjian, Habib
Publisher: name: Columbia University
Year: 2006
Subjects: Historical linguistics
Māzandarānī language
History

description: This article transcribes and glosses a nineteenth-century Mazandarani document on Babi-state conflict at Shaikh Tabarsi. Collected in 1860 in the town of Barfurush, it was published five years later by Boris Andreevich Dorn in Perso-Arabic characters. The text is the first known prose document based on natural speech in the modern Mazandarani language. The language of the text is fundamentally the same as that spoken today in the Persian province of Mazandaran, located south of the Caspian Sea. As one expects, however, there are certain extinct traits in the text, which could be identified only by comparison with other surviving Mazandarani documents of the same period. The text will contribute to the study of the largely understudied language of Mazandaran, particularly to its development since the composition of the text. It may also serve as a supplementary historical document for the historic incident it narrates.
Additional file 1 of Hemophagocytic lymphohistiocytosis secondary to virus infection and followed by lupus nephritis recurrence in a renal transplantation pediatric recipient: a case report
Creators: name: Li, Jiyuan
name: Gao, Chen
name: Zhu, Xuejing
name: Yang, Danyi
name: Mao, Wendan
name: Yao, Hengchang
name: Deng, Mingyang
name: Tan, Liang
name: Dai, Helong
name: Xie, Xubiao
name: Peng, Longkai
name: Peng, Fenghua
Publisher: name: figshare
Year: 2023
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Supplementary Material 1
Vortex Dynamics in Ferromagnetic Superconductors: Vortex Clusters, Domain Walls and Enhanced Viscosity
Creators: name: Lin, Shi-Zeng
name: Bulaevskii, Lev N.
name: Batista, Cristian D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate that there is a long-range vortex-vortex attraction in ferromagnetic superconductors due to polarization of the magnetic moments. Vortex clusters are then stabilized in the ground state for low vortex densities. The motion of vortex clusters driven by the Lorentz force excites magnons. This regime becomes unstable at a threshold velocity above which domain walls are generated for slow relaxation of the magnetic moments and the vortex configuration becomes modulated. This dynamics of vortices and magnetic moments can be probed by transport measurements.
description: 6 pages and 3 figures
Additional file 1 of Research on the relationship between common metabolic syndrome and meteorological factors in Wuhu, a subtropical humid city of China
Creators: name: Zhang, Tao
name: Ni, Man
name: Jia, Juan
name: Deng, Yujie
name: Sun, Xiaoya
name: Wang, Xinqi
name: Chen, Yuting
name: Fang, Lanlan
name: Zhao, Hui
name: Xu, Shanshan
name: Ma, Yubo
name: Zhu, Jiansheng
name: Pan, Faming
Publisher: name: figshare
Year: 2023
Subjects: Medicine
Biotechnology
Biological Sciences not elsewhere classified
Cancer
Science Policy
Computational Biology

description: Supplementary Material 1
Correlates of yield, fecundity and survival of a wild harvested Cyclopia intermedia (honeybush) population
Creators: name: Lee, Alan Tristram Kenneth
name: McGregor, Gillian
name: Coetzee, Anina
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Ecology
subject: Plant Biology

description: Cyclopia intermedia (honeybush) is a plant species endemic to the fynbos biome. Wild harvested populations are used commercially to produce tea. The species is a resprouter, regrowing from underground rootstock after fires, and as such resprouts once it has been cut. However, there is concern that premature cutting may be compromising rootstock recovery. We report on an initial 400 wild plants measured and monitored under different harvest regimes, including control plants. Plants were harvested once in 2018 and regrowth and survival monitored until 2021. Here, an allometric calculation is provided based on height and stem number to estimate the harvest yield. Plants in valleys or with high surrounding vegetation had the highest yield values and potential fecundity. After harvest, an increase in mortality was correlated with plant size, being higher for smaller plants, but after two years of drought high mortality was not explained by any harvesting category nor any of the site variables, suggesting drought results in high plant mortality regardless of harvest history. The study clarifies several speculative components of harvest method, demonstrates that a complete cut rather than half cut results in better potential yield, and that an ash admixture post-harvest had no measurable impact on regrowth.
Cytogenetic abnormalities in reactive lymphoid hyperplasia: byproducts of the germinal centre reaction or indicators of lymphoma?
Creators: name: Sevilla, Deborah W.
name: Vundavalli, Murty V.
name: Sun, Xin-Lai
name: Nandula, Subhadra
name: Mansukhani, Mahesh M.
name: Alobeid, Bachir
name: Bhagat, Govind
Publisher: name: Columbia University
Year: 2011
Subjects: Cytogenetics
Lymphomas
Karyotypes
Germinal centers

description: Non-random karyotypic abnormalities associated with non-Hodgkin lymphomas (NHLs) have been described in cases of reactive lymphoid hyperplasia (RLH). However, the frequency and types of cytogenetic aberrations detected and their clinical relevance are unknown. To address these questions, we undertook a retrospective analysis of a large series of RLH diagnosed at our institute over 8 years. Cytogenetic abnormalities were identified in 20 of 116 (17%) cases with informative karyotypes, comprising 14 (70%) structural and 11 (55%) numerical changes. Clonal (n 1⁄4 14, 70%) and non-clonal (n 1⁄4 6, 30%) abnormalities were observed. Aberrations of chromosome 14 were the most frequent (n1⁄48, 42%, 7 represented IgH translocations), followed by chromosome 3 (n1⁄44, 3 represented BCL6 translocations), and chromosome 12 (n1⁄44). Abnormal karyotypes were most often associated with florid follicular hyperplasia. Isolated lymphoid organ (lymph node, tonsil or spleen) enlargement (12/20, 60%) was more common, no specific etiology was identified in 10/20 (50%) cases and only 1 of 18 patients with clinical follow-up (range 2–107 months, median 60 months) developed lymphoma. In our experience, cytogenetic abnormalities involving loci associated with B-cell NHL are not infrequently detected in RLH. Their occurrence portends low risk for lymphomagenesis, however longer follow-up is prudent to further evaluate the natural history of such cases.
A possible method for non-Hermitian and non-$PT$-symmetric Hamiltonian systems
Creators: name: Li, Jun-Qing
name: Miao, Yan-Gang
name: Xue, Zhao
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A possible method to investigate non-Hermitian Hamiltonians is suggested through finding a Hermitian operator $η_+$ and defining the annihilation and creation operators to be $η_+$-pseudo-Hermitian adjoint to each other. The operator $η_+$ represents the $η_+$-pseudo-Hermiticity of Hamiltonians. As an example, a non-Hermitian and non-$PT$-symmetric Hamiltonian with imaginary linear coordinate and linear momentum terms is constructed and analyzed in detail. The operator $η_+$ is found, based on which, a real spectrum and a positive-definite inner product, together with the probability explanation of wave functions, the orthogonality of eigenstates, and the unitarity of time evolution, are obtained for the non-Hermitian and non-$PT$-symmetric Hamiltonian. Moreover, this Hamiltonian turns out to be coupled when it is extended to the canonical noncommutative space with noncommutative spatial coordinate operators and noncommutative momentum operators as well. Our method is applicable to the coupled Hamiltonian. Then the first and second order noncommutative corrections of energy levels are calculated, and in particular the reality of energy spectra, the positive-definiteness of inner products, and the related properties (the probability explanation of wave functions, the orthogonality of eigenstates, and the unitarity of time evolution) are found not to be altered by the noncommutativity.
description: 15 pages, no figures; v2: clarifications added; v3: 16 pages, 1 figure, clarifications made clearer; v4: 19 pages, the main context is completely rewritten; v5: 25 pages, title slightly changed, clarifications added, the final version to appear in PLOS ONE
The language factor in English-medium instruction (EMI). The students? language experience in an EMI class in Medicine and Surgery
Creators: name: CICILLINI, STEFANIA
Publisher: name: Universit� degli studi di Genova
Year: 2022

description: Over the past decades, an increasing number of institutions in the world has been driven by the need to become more international and attractive in the global scenario. Among the different strategies adopted to respond to the call for the internationalization of higher education, several institutions in non-English speaking countries have begun to offer English-medium instruction (EMI) degree programmes, in which discipline-specific content is delivered through the medium of English (Doiz, Lasagabaster and Sierra, 2011; W�chter and Maiworm, 2014; Valcke, Murphy and Costa, 2017; Macaro, 2018; Pecorari and Malmstr�m, 2018). Although English language outcomes are neither mentioned in the definitions of EMI nor in the courses? syllabi, English proficiency improvement is one of the most common motivating factors to opt for English-mediated education (Costa and Mariotti, 2017; Galloway and Ruegg, 2020). Furthermore, given the amount of language input received by the students in class, some degree of incidental language learning is expected (Aguilar, 2017). However, little research has focused on the students? English proficiency development in EMI classes.
This study aims to address this gap of knowledge by focusing on the students? language experience in an EMI degree programme in Medicine and Surgery in Italy. It explores the students? motivations and expectations of the programme and the language gains obtained after two years of English-medium instruction. Therefore, it observes the role played by English in this EMI setting and to what extent English proficiency improvement takes place incidentally, while students are engaged in subject-oriented disciplines.
Since this is a longitudinal study, the data collection was carried out in two academic years and involved one-hundred medical students. Data were collected by means of three questionnaires and two language tests. While questionnaires were used primarily to explore the students? attitudes and opinions on their experience in an English-mediated educational setting, language tests assessed the students? language gains in their receptive skills.
The findings suggest that English plays a key role in EMI and that students have high expectations from their lecturers? English competence and their own language proficiency. In addition, the results of the language tests revealed a statistically significant improvement in the students? reading skills, which according to them took place incidentally. Drawing on these results, this research indicates different actions to be put in place if English proficiency improvement is expected in such programmes, including language goals and more effective language support.
title: From Bust to Boom: The success of industry collaboration in US sea scallop rsearch
Creators: name: O’Keefe, Catherine E.
name: Stokesbury, Kevin D.E.
Publisher: name: ASC 2009 - Theme session L
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.Crises in the fishing industry have caused distrust between fishers and fisheries scientists. In such crises, fishermen and scientists have found ways to work together, resulting in cooperative research programs. Despite the clear benefits of cooperation, including industry empowerment, transparency of analysis and unbiased results, cooperative research programs often lack the critical components that make the collected data useful for management decisions. The success of cooperative research hinges on participation from the fishing industry throughout the entirety of the research program, from project design to data analysis. Furthermore, answerable, scientific questions must be outlined at initiation of the research. Finally, data must be collected and analyzed in a way that can be translated into management decisions and accepted by regulatory agencies. We have conducted a video survey for Atlantic sea scallops (Placopecten magellanicus) cooperatively with the U.S. scallop fishing industry since 1999. The survey was initiated by the fishing industry as a result of decreased landings and increased regulatory actions with the goal of determining the number of scallops on Georges Bank. Over the last decade, industry participation has grown to include over 300 vessels and 20 shore-based operations. Data and results from the video survey have been included in traditional stock assessments and decision-making processes and have been instrumental in maintaining the success of the area rotation management scheme. This case study outlines the initiation of the survey and examines the success and difficulties associated with bringing cooperative research data into the management arena
Note on Permutation Sum of Color-ordered Gluon Amplitudes
Creators: name: Du, Yi-jian
name: Feng, Bo
name: Fu, Chih-Hao
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this note we show that under BCFW-deformation the large z behavior of permutation sum of color-ordered gluon amplitudes found by Boels and Isermann in arxiv:1109.5888 can be simply understood from the well known Kleiss-Kuijf relation and Bern-Carrasco-Johansson relation.
description: 9 pages, minor corrections, reference list and acknowledgment updated
Advances and perspectives in amyloid PET quantitative interpretation
Creators: name: PEIRA, ENRICO
Publisher: name: Universit� degli studi di Genova
Year: 2022

description: Amyloid imaging refers to a diagnostic examination that allows for the in-vivo detection of amyloid aggregation, considered a pathological hallmark of Alzheimer's disease (AD). The technique of choice for amyloid imaging is PET with appropriate radioligands, which has become a key tool in the diagnosis and research framework of AD. Due to the non-straightforward relationship between the presentation of the disease and the underlying molecular pathology, the diagnosis based purely on the clinical manifestation is a non-trivial task. Therefore, a great interest has developed around the methodologies for the assessment of in-vivo biomarkers (such as the amyloid aggregation) that can be used to complement the clinical evaluation and provide direct evidence of the core features of the pathology.
There are several evolving aspects related to the analysis of amyloid PET in clinical setting. For example, it is becoming of common wisdom that the dichotomous classification - classically used in clinical practice - based solely on visual analysis is inadequate, as it does not provide information on the level of positivity and is used to describe a phenomenon that is gradual and can last up to 15 years. Quantitative approaches that provide numerical estimates of the physiological processes of interest may help by giving the opportunity of ranking brain amyloidosis to find out, for example, patients who would benefit from a treatment. These approaches are constantly evolving and there is currently no consensus on which is the best way to perform a quantitative analysis of amyloid PET images or which is the most feasible in clinical setting.
Other relevant issues are related to the differences between radiotracers and to image quality factors that that can affect the interpretation of the scan even for expert readers even when supported by quantification.
Another poorly understood aspect is the potential information that is lost in amyloid PET images using current analysis pipelines. Up to now, the amyloid imaging data have mainly been used for the definition of global amyloid profile. Recent studies have shown that this imaging modality can provide much more detailed information when assessed at regional level.
In this context, my research focused mainly on two aspects of amyloid PET assessment. The first is related to technical issues that can arise in the evaluation of the scans, such as the
application of an appropriate analysis method to different radiotracers, the comparison of multiple-reader visual evaluations and the effect of image quality. A novel quantitative
approach has also been developed, validated and compared to both standard and highly sophisticated techniques.
The second aspect is more clinical-related and has to do with the possible interpretation of regional amyloid burden and the assessment of the relationship between the regional load, the cognitive decline and the regional tau (the other major biomarker in Alzheimer?s disease).
title: Κατασκευή διαδραστικών βιβλίων με τεχνολογία επαυξημένης πραγματικότητας
title: Interactive book development using augmented reality
titleType: AlternativeTitle
Creators: name: Γιακουμίδης, Στυλιανός
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Κάμερα
Ανίχνευση προτύπων
Ομογραφία
Επεξεργασία εικόνας

description: Ο σκοπός της παρούσας διπλωματικής εργασίας είναι η παροχή μιας εμβυθιστικής εμπειρίας ανάγνωσης βιβλίων χρησιμοποιώντας τις εξελίξεις στην τεχνολογία της επαυξημένης πραγματικότητας. Η Android εφαρμογή που κατασκευάστηκε προσθέτει ψηφιακά στοιχεία οπτικού ή ακουστικού περιεχομένου κατά τη διάρκεια της ανάγνωσης του βιβλίου ανάλογα με την τρέχουσα σελίδα. Η επιλογή των ψηφιακών στοιχείων καθώς και του βιβλίου πραγματοποιείται κατά την διάρκεια εκτέλεσης της εφαρμογής, μέσω αρχείων εισόδου, εξαλείφοντας την ανάγκη δημιουργίας διαφορετικών εκδόσεων της εφαρμογής για κάθε βιβλίο.
Long-range Rydberg-Rydberg interactions in calcium, strontium and ytterbium
Creators: name: Vaillant, C. L.
name: Jones, M. P. A.
name: Potvliege, R. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Long-range dipole-dipole and quadrupole-quadrupole interactions between pairs of Rydberg atoms are calculated perturbatively for calcium, strontium and ytterbium within the Coulomb approximation. Quantum defects, obtained by fitting existing laser spectroscopic data, are provided for all $S$, $P$, $D$ and $F$ series of strontium and for the $^3P_2$ series of calcium. The results show qualitative differences with the alkali metal atoms, including isotropically attractive interactions of the strontium $^1S_0$ states and a greater rarity of Förster resonances. Only two such resonances are identified, both in triplet series of strontium. The angular dependence of the long range interaction is briefly discussed.
description: 12 pages, 7 figures
Ζητήματα κρατικών ενισχύσεων στον τομέα της ενέργειας από τη σκοπιά της ενωσιακής έννομης τάξης
Creators: name: Αλεξίου, Ελένη
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ενέργεια
subject: ΑΠΕ
subject: Κρατικές ενισχύσεις
subject: Νομολογία
subject: ΔΕΕ
subject: Ευρωπαϊκό Δικαστήριο
subject: Καθεστώτα στήριξης
subject: Κατευθυντήριες Γραμμές
subject: Ηλεκτρική ενέργεια

description: Η Ευρωπαϊκή Ένωση (ΕΕ) τις τελευταίες δύο δεκαετίες προωθεί την απελευθέρωση των εθνικών αγορών ηλεκτρικής ενέργειας με απώτερο σκοπό την διαμόρφωση μιας ενιαίας Ευρωπαϊκής αγοράς. Η ανάγκη για μια συνεκτική ενεργειακή πολιτική της ΕΕ έχει γίνει επιτακτική εδώ και αρκετά χρόνια καθώς η ενέργεια υπήρξε ένας από τους ακρογωνιαίους λίθους της ευρωπαϊκής ολοκλήρωσης. Η σταδιακή απελευθέρωση της αγοράς ενέργειας καθώς και η επιβολή του δικαίου ανταγωνισμού ως εργαλείου για την λειτουργικότητα της αγοράς ενέργειας, αποτέλεσαν προτεραιότητα για την ΕΕ. Ένα από τα βασικότερα εργαλεία για την υποστήριξη της απελευθέρωσης του τομέα της ενέργειας αλλά και της ανάπτυξης μιας ανταγωνιστικής αγοράς Α.Π.Ε. αποτελούν οι κρατικές ενισχύσεις, όπως αυτές θεσμοθετούνται σε επίπεδο ΕΕ στα άρθρα 107 και 108 της ΣΛΕΕ. Προς ενίσχυση της εφαρμογής των κρατικών ενισχύσεων στον τομέα της ενέργειας, η Επιτροπή το 2014 έθεσε σε ισχύ τις Κατευθυντήριες Γραμμές («ΚΓ») για την κήρυξη συγκεκριμένων κατηγοριών ενισχύσεων ως συμβατών με την εσωτερική αγορά κατ' εφαρμογή των άρθρων 107 και 108 ΣΛΕΕ. Ωστόσο η ιδιαιτερότητα του τομέα παραγωγής ηλεκτρικής ενέργειας από ΑΠΕ καθώς και η πολυπλοκότητα των περιπτώσεων, προσέδωσε έναν ιδιαίτερο ρόλο στις αποφάσεις της Ευρωπαϊκής Επιτροπής και του Δικαστηρίου της Ευρωπαϊκής Ένωσης στην πραγματική εφαρμογή των Κατευθυντήριων Γραμμών για τις κρατικές ενισχύσεις στον τομέα της ενέργειας. Σκοπός της παρούσης διπλωματικής εργασίας είναι η ανάλυση ζητημάτων κρατικών ενισχύσεων στον τομέα της ενέργειας και ο καίριος ρόλος των αποφάσεων της Επιτροπής και του ΔΕΕ. Πιο συγκεκριμένα, στο πρώτο κεφάλαιο παρουσιάζεται η ενεργειακή πολιτική της ΕΕ μέσω ιστορικής διαδρομής στο δίκαιο των Συνθηκών. Παράλληλα, περιγράφεται η σταδιακή απελευθέρωση της αγοράς ενέργειας, καθώς και ο ρόλος του δικαίου ανταγωνισμού ως εργαλείου λειτουργικότητας της αγοράς ενέργειας. Στο δεύτερο κεφάλαιο παρουσιάζονται οι γενικές αρχές που διέπουν τις κρατικές ενισχύσεις υπό το πρίσμα της ΕΕ, καθώς και οι ειδικότερες διατάξεις των άρθρων 107 και 108 της ΣΛΕΕ. Στο τρίτο κεφάλαιο, αναλύεται η έννοια των κρατικών ενισχύσεων που αφορούν τον τομέα της ενέργειας καθώς και οι Κατευθυντήριες Γραμμές, που υιοθετήθηκαν το 2014 για τις κρατικές ενισχύσεις στους τομείς του περιβάλλοντος και της ενέργειας. Στο τέταρτο κεφάλαιο αναδεικνύεται ο ρόλος της Επιτροπής και του ΔΕΕ στην εφαρμογή των Κατευθυντήριων Γραμμών για τις κρατικές ενισχύσεις στον τομέα της ενέργειας. Τέλος, στο πέμπτο κεφάλαιο παρουσιάζονται γενικά συμπεράσματα σχετικά με τον ρόλο της νομολογίας του ΔΕΕ καθώς και το μέλλον των Κατευθυντήριων Γραμμών.
Large deviation principles for the stochastic quasi-geostrophic equation
Creators: name: Liu, Wei
name: Röckner, Michael
name: Zhu, Xiangchan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 60H15, 60F10, 35K55, 35Q86

description: In this paper we establish the large deviation principle for the stochastic quasi-geostrophic equation in the subcritical case with small multiplicative noise. The proof is mainly based on the stochastic control and weak convergence approach. Some analogous results are also obtained for the small time asymptotics of the stochastic quasi-geostrophic equation.
description: 29 pages; correct some misprints and small gaps
MODERN BANDIT OPTIMIZATION WITH STATISTICAL GUARANTEES
Creators: name: Li, Wenjie
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: classificationCode: 490501
subject: Applied statistics
classificationCode: 490304
subject: Optimisation

description: Bandit and optimization represent prominent areas of machine learning research. Despite extensive prior research on these topics in various contexts, modern challenges, such as deal- ing with highly unsmooth nonlinear reward objectives and incorporating federated learning, have sparked new discussions. The X-armed bandit problem is a specialized case where bandit algorithms and blackbox optimization techniques join forces to address noisy reward functions within continuous domains to minize the regret. This thesis concentrates on the X -armed bandit problem in a modern setting. In the first chapter, we introduce an optimal statistical collaboration framework for the single-client X -armed bandit problem, expanding the range of objectives by considering more general smoothness assumptions and empha- sizing tighter statistical error measures to expedite learning. The second chapter addresses the federated X-armed bandit problem, providing a solution for collaboratively optimizing the average global objective while ensuring client privacy. In the third chapter, we confront the more intricate personalized federated X -armed bandit problem. An enhanced algorithm facilitating the simultaneous optimization of all local objectives is proposed.
Real Time Data Mining-based Intrusion Detection
Creators: name: Lee, Wenke
name: Stolfo, Salvatore
name: Chan, Philip K.
name: Eskin, Eleazar
name: Fan, Wei
name: Miller, Matthew
name: Hershkop, Shlomo
name: Zhang, Junxin
Publisher: name: Columbia University
Year: 2001
Subjects: Computer science

description: We present an overview of our research in real time data mining-based intrusion detection systems (IDSs). We focus on issues related to deploying a data mining-based IDS in a real time environment. We describe our approaches to address three types of issues: accuracy, efficiency, and usability. To improve accuracy, data mining programs are used to analyze audit data and extract features that can distinguish normal activities from intrusions; we use artificial anomalies along with normal and/or intrusion data to produce more effective misuse and anomaly detection models. To improve efficiency, the computational costs of features are analyzed and a multiple-model cost-based approach is used to produce detection models with low cost and high accuracy. We also present a distributed architecture for evaluating cost-sensitive models in real-time. To improve usability, adaptive learning algorithms are used to facilitate model construction and incremental updates; unsupervised anomaly detection algorithms are used to reduce the reliance on labeled data. We also present an architecture consisting of sensors, detectors, a data warehouse, and model generation components. This architecture facilitates the sharing and storage of audit data and the distribution of new or updated models. This architecture also improves the efficiency and scalability of the IDS.
Synthesis and Characterization of Halide Perovskites and Lower-Dimensional Metal Halide Based Materials
Creators: name: RAY, ANIRUDDHA
Publisher: name: Universit� degli studi di Genova
Year: 2021

description: The goal of this doctoral thesis is to synthesize metal halide octahedra based materials of varying dimensionality and explore their intrinsic structure-property relationships while attempting to apply them in prototype devices.
In Chapter 2 we found using our solvent acidolysis crystallization (SAC) method, 44% of methylammonium can be replaced with a larger organic cation (dimethylammonium) without breaking the 3-dimensional (3D) perovskite structure. We then employed different temperature-dependent studies to explore the implications of such a mixed organic cation composition on the structure and on the optoelectronic properties as well as on photodetector performance.
In Chapter 3 we used the SAC process to fabricate lead-free 2D methylammonium copper halide materials. Here we found that tuning the halide compositions not only modulated the bulk phase and optical properties but also the finer structural effects such as vacancy positions and thermal disorder parameters. We connected these local atomic scale observations to the efficacy of ionic migration in these materials that also modulates their performance in resistive switching memory devices.
In Chapter 4 we explored the structural versatility of Cs-Pb-Br based compounds by studying the connection between the nature and size of the solvated species and the precipitated 0D Cs4PbBr6 and 3D CsPbBr3 powders. Identifying the spectroscopic signatures of the species helped us select the appropriate solvents to obtain 3D-free Cs4PbBr6 that we studied for the first time using 133Cs and 207Pb solid-state nuclear magnetic resonance. We hypothesized on the possible origins of the green emission in these 0D compounds and also studied their suitability for radioluminescence applications.
Kamimuria wangi Du, sp.nov.
Creators: name: Sun, Hai-Tao
name: Du, Yu-Zhou
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Kamimuria
Kamimuria wangi

description: Kamimuria wangi Du, sp.nov.
Figures 12–16
 Type Material. Holotype, male, China: Shannxi province, Taibai county, 23 July 1994, Leg. Wang Min. Paratypes, Henan province, Luanchuan county, Longyuwan, 1000 m, 10–14 July 1996, 1 male, Leg. Wang Bei-Xin; same location, 20 July, 2004, 1 male, Leg. Liu Wei-Xing; Shaanxi province, Fengcounty, Qinling station, 21 July 1994, 3 males, Leg. Yang Fang; Shannxi province, Tiantai Mt., head waters of Jialing river, 1650 m, 30 August 2006, 8 males, Leg. Wang Zhi-Jie; same location, 31 August 2006, 3 male, Leg. Wang Xiao-Wang; Shannxi province, Taibai Mt., Haoping Temple, 13–15 August 1981, 2 males, Leg. unknown.
 Diagnosis. This species is characterized by the aedeagal tube being sac-like with a pair of small, apical, tongue-shaped sclerites on ventroapical surface.
 13
 15 16 14 Description. Adult habitus (Fig. 12). General color yellow-brown to brown. Head with yellow-brown background color, but a darker, interocellar triangle open posteriorly. Basal antennal segment dark brown, second and subsequent segments pale yellow-brown. Pronotum pale brown with scattered pale rugosities on disk (Fig. 13). Wing membrane fuscous with darker veins. Legs yellow-brown with narrow, black band at apex of femora; base of tibiae dark brown.
 Male. Forewing length 21 mm. Presternum of metathorax with a small patch of hairs. Hemitergal lobes slender, finger-like and with a few sensilla basiconica on ventroapical margin. Tergum 9 with a mesal, wide band-like patch of sensilla basiconica; tergum 8 with a smaller, band-like patch of sensilla basiconica and extending over most of tergum length (Fig. 14); tergum 7 with a few sensilla basiconica in a sparse mesal patch. Hair brushes present on sterna 4–7. Aedeagus membranous, tube with a small tongue-shaped sclerite on ventroapical surface. Sac with two thirds section armed with a large patch of moderate sized spines; patch encircles dorsolateral area but is interrupted ventrally by a median longitudinal bare area and dorsally by a nearly triangular bare area; subapical dorsal surface with a triangular patch of moderate spines; apex naked but bearing a pair of large spines (Figs. 15, 16).
 Female. Unknown.
 Etymology. The patronym honors Dr. Wang Min, one specimen of this species collected by him is used as the holotype.
 Remarks. Males of this species are similar to K. chungnanshana Wu, but differ significantly in aedeagal features, K. chungnanshana lacks a pair of large spines on ventroapical surface.
description: Published as part of Sun, Hai-Tao & Du, Yu-Zhou, 2012, Two new species of the genus Kamimuria (Plecoptera: Perlidae) from China, with redescription of Kamimuria cheni Wu and Kamimuria Chungnanshana Wu, pp. 61-68 in Zootaxa 3455 on pages 65-67, DOI: 10.5281/zenodo.210213