cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Nesterov Acceleration for Equality-Constrained Convex Optimization via Continuously Differentiable Penalty Functions
Creators: name: Srivastava, Priyank
name: Cortes, Jorge
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose a framework to use Nesterov's accelerated method for constrained convex optimization problems. Our approach consists of first reformulating the original problem as an unconstrained optimization problem using a continuously differentiable exact penalty function. This reformulation is based on replacing the Lagrange multipliers in the augmented Lagrangian of the original problem by Lagrange multiplier functions. The expressions of these Lagrange multiplier functions, which depend upon the gradients of the objective function and the constraints, can make the unconstrained penalty function non-convex in general even if the original problem is convex. We establish sufficient conditions on the objective function and the constraints of the original problem under which the unconstrained penalty function is convex. This enables us to use Nesterov's accelerated gradient method for unconstrained convex optimization and achieve a guaranteed rate of convergence which is better than the state-of-the-art first-order algorithms for constrained convex optimization. Simulations illustrate our results.
description: 7 pages, 1 figure
title: How Do Environmental Variables Affect Growth And Feeding Of The Japanese Common Squid (Todarodes Pacificus)?
Creators: name: Kidokoro, Hideaki
Publisher: name: ASC 1998 - M
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.In the Sea of Japan, a remarkable subarctic front develops around 40N longitude, by which the Sea of Japan is divided into two regions, namely subarctic region and Tsushima current region. The author investigated by statolith aging technique and stomach contents survey the growth and the feeding of Japanese common squid (Todarodes pacificus) caught at each of these two regions. The main purpose of the present study was to examine whether environmental variables observed at these regions affect the growth and feeding of Japanese common squid. The data showed that although individuals of Tsushima current region dominantly ate fishes, those of Subarctic region ate zooplankton with huge amount, and the growth rate of individuals migrating through Subarctic region were higher than that of Tsushima current region. The growth curves of them fitted logistic formula were estimated as follows. Subarctic region ; DML=262.7/(1 +exp(4.22-0.0244d)). Tsushima current region ; DML=233.3/(l +exp(4. 10-0.0244d)), where DML and d mean dorsal mantle length and days after hatching, respectively.
ARCRAIDER I: Detailed optical and X-ray analysis of the cooling flow cluster Z3146
Creators: name: Kausch, W.
name: Gitti, M.
name: Erben, T.
name: Schindler, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a detailed analysis of the medium redshift (z=0.2906) galaxy cluster Z3146 which is part of the ongoing ARCRAIDER project, a systematic search for gravitational arcs in massive clusters of galaxies. The analysis of Z3146 is based on deep optical wide field observations in the B, V and R bands obtained with the WFI@ESO2.2m, and shallow archival WFPC2@HST taken with the F606W filter, which are used for strong as well as weak lensing analyses. Additionally we have used publicly available XMM/Newton observations for a detailed X-ray analysis of Z3146. Both methods, lensing and X-ray, were used to determine the dynamical state and to estimate the total mass. We also identified four gravitational arc candidates. We find this cluster to be in a relaxed state, which is confirmed by a large cooling flow with nominal ~1600M_\odot per year, regular galaxy density and light distributions and a regular shape of the weak lensing mass reconstruction. The mass content derived with the different methods agrees well within 25% at r_{200}=1661 h_{70}^{-1}kpc indicating a velocity dispersion of σ_v=869^{+124}_{-153}km/s.
description: accepted by A&A; 23 pages, 28 figures, 6 tables; High resolution version can be found here: http://astro.uibk.ac.at/~w.kausch/Z3146_astroph_hires.pdf.gz
title: Interannual Variability In The Neon Flying Squid Abundance And Oceanographic Conditions In The Central North Pacific Ocean During 1979-1997
Creators: name: Yatsu, A.
name: Mori, J.
name: Watanabe, T.
name: Meguro, T.
name: Kamei, Y.
name: Sakurai, Y.
Publisher: name: ASC 1998 - M
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The neon flying squid, Ommastrephes bartrarni, was the target species of the Japanese squid driftnet fishery in the Central North Pacific Ocean during 1979-1992. Interannual variation in the neon flying squid catch-per-unit-effort (CPUE) in this fishery was highly correlated with that of the Hokkaido University's research driftnet surveys since 1979 along 175°30'E in July which coincided with the peak of the commercial fishery. While productivity in the northern North Pacific Ocean was high during the 1970's and declining to the present days, the research net CPUE of 0. bartrami . was higher in 1979 and in 1994-97 than in other years, suggesting effect of fishing on the stock abundance. The distributions and CPUE variability in 0. bartarmi and other pelagic nekton were also affected by water temperature and salinity structures around the Subarctic Boundary, Effect of the squid fishery on the species community was also examined.
Combining bulk and single-cell RNA-sequencing data to reveal gene expression pattern of chondrocytes in the osteoarthritic knee
Creators: name: Li, Xiaoyu
name: Liao, Zheting
name: Deng, Zhonghao
name: Chen, Nachun
name: Zhao, Liang
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Evolutionary Biology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Developmental Biology
subject: Hematology
subject: Computational Biology

description: Osteoarthritis (OA) occurs mostly in the knees, hips, finger interphalangeal joints, and spinal facet joints, and is characterized by cartilage degeneration. The existing bulk RNA sequencing (bulk RNA-seq) and single-cell sequencing (scRNA-seq) data for chondrocytes in the osteoarthritic knee joint provide the expression profiles of entire cell populations and individual cells, respectively. Here, we aimed to analyze these two types of sequencing data in order to obtain a more comprehensive understanding of OA. We compared the analysis results of bulk RNA-seq and scRNA-seq from the dataset GSE114007 and the dataset GSE104782, respectively, and identified the differentially expressed genes (DEGs). Then, we tried to find the key The transcription factor is a more fomal term (TFs) and long non-coding RNA (lncRNA) regulation. We highlighted 271 genes that were simultaneously suggested by these two types of data and provided their possible expression pattern in OA. Among the 271 genes, we identified 14 TFs, and TWIST2, MYBL2, RELA, JUN, KLF4, and PTTG1 could be the key TFs for the 271 genes. We also found that 8 lncRNAs among the 271 genes and the lncRNA regulation between CYTOR and NRP1 could contribute to the pain and vascularization of cartilage in the osteoarthritic knee. In short, our research combined the analysis results of bulk RNA-seq and scRNA-seq data for OA chondrocytes, which will contribute to further elucidation of the molecular mechanisms of OA pathogenesis.
The effects of forest degradation on soil carbon dynamics in the tropics
Creators: name: Kerdraon-Byrne, Deirdre
Publisher: name: Lancaster University
Year: 2019

description: Plant-soil interactions and soil carbon dynamics are an essential part of
      soil function. Land-use change can affect the soil’s ability to accumulate
      and store carbon. Deforestation and conversion to croplands has decreased
      tree species cover and diversity in the tropics resulting in degraded and
      secondary forests becoming the dominant forested habitat. Understanding
      the effects of forest degradation on soil carbon dynamics is vital if we
      are to remediate these ecosystems under climate change.

      The overarching aim of this thesis was understanding how changes in tree
      and plant species composition at different levels of degradation affect
      soil carbon dynamics and litter decomposition in the old and neo-tropics
      using litter transplant experiments in the field. Malaysia is one of the
      two biggest producers of palm oil in the world with Indonesia. Borneo is a
      biodiversity hotspot, but this ecosystem is decreasing at an alarming
      rate. Sabah, in norther Malaysian Borneo is converting its tropical forest
      to oil palm plantations resulting in vast expanses of oil palm
      monocultures containing secondary forest fragments at various degrees of
      degradation. In Central America, the tree cover is also dominated by
      secondary forests and timber plantations; in Panama, only 21 % of the tree
      cover classified as intact forest and there are remediation projects in
      place to encourage reforestation of degraded landscapes into plantations
      using native timber species.

      The level of degradation in the habitats changed the microclimate which
      affected soil properties, microbial activity and litter decomposition.
      Litter properties also had an effect on the rate of litter decomposition
      and microbial activity. The loss of tree cover in the deforested habitats
      and monocultures resulted in lower microbial activity and decomposition
      rates whereas the secondary forests has similar microbial activity and
      decomposition rates as the old growth forests. Overall, my results suggest
      that mixed litter inputs are crucial for maintaining soil function and
      that tropical forest soils might be more resilient to change than
      expected.
Analytic three dimensional image reconstruction from projections
Creators: name: Kinahan, Paul Eugene
Publisher: name: University of British Columbia
Year: 2010

description: This work presents an analytic three dimensional image reconstruction algorithm that was developed for a proposed volume-imaging PET scanner. The development of the algorithm was motivated by the scanner's ability to collect an order of magnitude more data than current PET systems and the lack of an efficient algorithm that could use the extra data. The algorithm is based on an extension of the Recovery Operator of Orlov[68] and operates by convolution in object space. This method of operation sets it apart from other analytic direct image reconstruction algorithms that rely on Fourier transforms. The algorithm is tested with ideal data and parameters that are appropriate to the new PET scanner. The results of the test show that the algorithm behaves as expected except for a 17% overshoot in the reconstructed value in one area. An explanation of this artifact is suggested, although not verified. Finally, the efficacy of the algorithm is demonstrated by proving that it is functionally equivalent to Fourier transform methods.
Fair Mixup: Fairness via Interpolation
Creators: name: Chuang, Ching-Yao
name: Mroueh, Youssef
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computers and Society (cs.CY)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Training classifiers under fairness constraints such as group fairness, regularizes the disparities of predictions between the groups. Nevertheless, even though the constraints are satisfied during training, they might not generalize at evaluation time. To improve the generalizability of fair classifiers, we propose fair mixup, a new data augmentation strategy for imposing the fairness constraint. In particular, we show that fairness can be achieved by regularizing the models on paths of interpolated samples between the groups. We use mixup, a powerful data augmentation strategy to generate these interpolates. We analyze fair mixup and empirically show that it ensures a better generalization for both accuracy and fairness measurement in tabular, vision, and language benchmarks.
Οι Αρχιεπίσκοποι Αχρίδος απέναντι στη λατινική Δύση (11ος-13ος αι.)
Creators: name: Nedeski, Viktor S.
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αρχιεπισκοπή Αχρίδος
Λατινική Δύση
Αντιλατινική Γραμματεία
Πατέρες της Αχρίδας
Ohrid Archbishopric
Latin West
Anti-Latin Literature
Fathers of Ohrid

description: Η Αρχιεπισκοπή Αχρίδος διεδραμάτισε σπουδαίο ρόλο στα εκκλησιαστικά γεγονότα της τελευταίας χιλιετίας. Τοποθετημένη γεωγραφικά σε μια περιοχή που υπήρξε το μήλο της έριδος μεταξύ του Ανατολικού και του Δυτικού Χριστιανισμού, η Αρχιεπισκοπή αυτή είχε εμπλακεί άμεσα στα θεολογικά προβλήματα και τις διαφωνίες μεταξύ Ανατολής και Δύσης. Έτσι, δεν είναι μικρός ο αριθμός των εκκλησιαστικών συγγραφέων και αρχιποιμένων της Αχρίδας, οι οποίοι επηρεαζόμενοι από τα τρέχοντα θεολογικά προβλήματα έλαβαν μέρος στις τρέχουσες θεολογικές συζητήσεις, κυρίως μέσα από τα συγγράμματά τους. Η έρευνά μου επικεντρώνεται ακριβώς στις θέσεις τεσσάρων αρχιεπισκόπων και πατέρων της Εκκλησίας της Αχρίδας για τα μεγάλα θεολογικά ζητήματα που ανέκυψαν μεταξύ της βυζαντινής Ανατολής και της λατινικής Δύσης, με μεγαλύτερη έμφαση στις γραπτές πραγματείες αυτών των μεγάλων διδασκάλων της, οι οποίοι δεν έχουν μόνο τοπικό, αλλά και οικουμενικό χαρακτήρα. Πρόκειται για τους αρχιεπισκόπους Αχρίδος: Λέοντα, Θεοφύλακτο, Δημήτριο Χωματηνό και Γεννάδιο, που ζουσαν και δρούσαν στην βυζαντινή εποχή της Αρχιεπισκοπής Αχρίδος (11ος-13ος αι.). Ο στόχος, δε, είναι να αποδειχθεί η μεγάλη σημασία της Αρχιεπισκοπής Αχρίδος και των πατέρων της στην οικοδόμηση της θεολογικής σκέψης και γραμματείας στη δεύτερη χιλιετία του Χριστιανισμού.
description: The Archdiocese of Ohrid played an important role in the ecclesiastical events of the last millennium. Geographically located in area that was the apple of contention between Eastern and Western Christianity, this Archdiocese was directly involved in theological problems and disagreements between East and West. Thus, the number of ecclesiastical writers and archbishops of Ohrid, who, influenced by the current theological problems, took part in the current theological discussions, mainly through their writings, is not small. My research focuses precisely on the positions of four archbishops and fathers of the Church of Ohrid on the great theological issues that arose between the Byzantine East and the Latin West, with a greater emphasis on the written treatises of these great teachers, who have not only local but also universal importance. These are the Archbishops of Ohrid: Leo, Theophylaktos, Demetrios Chomatinos and Gennadios, who lived and worked in the Byzantine era of the Archdiocese of Ohrid (11th-13th century). The aim is to prove the great importance of the Archdiocese of Ohrid and its fathers in building theological thought and literature in the second millennium of Christianity.
title: The Effects Of Temperature On Development And Hatching Of Squid Loligo Forbesi (Cephalopoda, Loliginidae) Embryos
Creators: name: Craig, Stephen
name: Black, Kenneth D.
name: Boyle, Peter R.
Publisher: name: ASC 1998 - M
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Loliginid squid spawn their eggs in gelatinous, finger-like strings. Both genetic and environmental factors, including temperature, are thought lead to variablility in vigor, size, sex and developmental timing of embryos within a single string. Loligo forbesi egg strings were collected from creel fishermen working in the Oban area. Egg string batches (specifics of place of spawning, date of spawning, water temperature, depth spawned) were suspended (in segregated tubes) in aquaria of aerated, mechanically-agitated sea water held at 6, 8, 10 and 12 °C under a light regime of 12hL:12hD. Embryo development was monitored from eggs (collected within 36 hours of spawning) to hatchling paralarvae. Each tube's daily hatchlings were removed, counted and preserved in absolute alcohol (for subsequent DNA I paternity analysis). At 6 °C embryo development was arrested and all strings kept at this temperature died after 6 weeks from the time of spawning. Eggs took on average 125.4, 71.9 and 58.1 days to hatch at at 8, 10 and 12 °C respectively but in each case there was significant variation found between batches. At temperatures of 8, 10 and 12 °C hatching occurred over the period of several days (ranging from 5 to 28 days). Within all batches there was considerable variation in egg expansion. This work will contribute to a greater understanding of the environmental factors affecting the recruitment variability in loliginid populations and the plasticity of life cycles.
Distortion in Groups of Circle and Surface Diffeomorphisms
Creators: name: Franks, John
Publisher: name: arXiv
Year: 2007
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37E30;57S30

description: In these lectures we consider how algebraic properties of discrete subgroups of Lie groups restrict the possible actions of those groups on surfaces. The results show a strong parallel between the possible actions of such a group on the circle $S^1$ and the measure preserving actions on surfaces. Our aim is the study of the (non)-existence of actions of lattices in a large class of non-compact Lie groups on surfaces. A definitive analysis of the analogous question for actions on $S^1$ was carried out by É. Ghys. Our approach is topological and insofar as possible we try to isolate properties of a group which provide the tools necessary for our analysis. The two key properties we consider are almost simplicity and the existence of a distortion element. Both will be defined and described in the lectures. Our techniques are almost all from low dimensional dynamics. But we are interested in how algebraic properties of a group -- commutativity, nilpotence, etc. affect the possible kinds of dynamics which can occur. For most of the results we will consider groups of diffeomorphisms which preserve a Borel probability measure.
title: Changes On Biochemical IndICES Of Growth Of Sepia Officinalis With Starvation And Refeeding
Creators: name: Bettencourt, V.
name: Castro, B.G.
name: Fuentes, L.
name: Guerra, A.
Publisher: name: ASC 1998 - M
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The suitability of RNA, DNA and protein contents of muscular tissues for detecting periods of starvation and refeeding, and their relation with individual growth of the cuttlefish, Sepia officinalis, paying special attention to individual differences, latency and dynamics in time of the level of these chemical substances are tested. After different periods of starvation and refeeding, 19 individuals were weighted and the muscular tissue analysed for content in RNA, DNA and proteins. All starved cuttlefish lost weight. After refeeding, body weight recovery was faster in the group starved 5 d than in the group starved 10 d. Specimens starved 20 d still showed negative growth rates after 30 d of refeeding even when their average feeding rate was higher than that of the individuals starved 5 or 10 d. RNA content was highly variable between individuals, but it decreased in all cuttlefish after starvation. There were not changes in the RNA content in non-starved animals. After refeeding, RNA concentration increased steadily with time but it did not reach the initial level even after 30 d in any starved group of animals. The protein content presented a similar, but weaker, variation. However, DNA contents did not show any clear tendency with starvation or refeeding. RNA muscular content seems to be a sensible indicator of the individual growth and nutritional condition of cuttlefish. However, due to its high between-individual variability, it could not be useful for population analysis. Further studies employing large samples will be needed for testing its applicability in population studies.
B2 1144+35B, a giant low power radio galaxy with superluminal motion. Orientation and evidence for recurrent activity
Creators: name: Giovannini, G.
name: Giroletti, M.
name: Taylor, G. B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The goal of this work is a detailed study of the nearby, low power radio galaxy B2 1144+35B. For this purpose, we performed new Very Long Baseline Array (VLBA) and Very Large Array (VLA) observations. This source has several properties (bright, nearby, large range of spatial structures, visible counterjet, etc.) that make it an excellent astrophysical laboratory for the study of the evolution of radio jets. Here we report the detection of motion in the counterjet at 0.23 $\pm$ 0.07 c, which allows us to estimate the orientation of the parsec-scale jet at 33$^\circ \pm 7^\circ$ from the line of sight, with an intrinsic velocity of (0.94$^{+0.06}_{-0.11}$)c. We also report on a brightening of the core at high frequencies which we suggest could be the result of a new component emerging from the core. High dynamic range VLBA observations at 5 GHz reveal, for the first time, extended emission connecting the core with the bright complex of emission that dominates the flux density of the parsec scale structure at frequencies below 20 GHz. The evolution of this bright complex is considered and its slow decline in flux density is interpreted as the result of an interaction with the interstellar medium of the host galaxy.
description: 7 pages, 6 b&w figures. A&A in press
Memristive Stochastic Computing for Deep Learning Parameter Optimization
Creators: name: Lammie, Corey
name: Eshraghian, Jason K.
name: Lu, Wei D.
name: Azghadi, Mostafa Rahimi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Emerging Technologies (cs.ET)
subject: Artificial Intelligence (cs.AI)
subject: Hardware Architecture (cs.AR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Stochastic Computing (SC) is a computing paradigm that allows for the low-cost and low-power computation of various arithmetic operations using stochastic bit streams and digital logic. In contrast to conventional representation schemes used within the binary domain, the sequence of bit streams in the stochastic domain is inconsequential, and computation is usually non-deterministic. In this brief, we exploit the stochasticity during switching of probabilistic Conductive Bridging RAM (CBRAM) devices to efficiently generate stochastic bit streams in order to perform Deep Learning (DL) parameter optimization, reducing the size of Multiply and Accumulate (MAC) units by 5 orders of magnitude. We demonstrate that in using a 40-nm Complementary Metal Oxide Semiconductor (CMOS) process our scalable architecture occupies 1.55mm$^2$ and consumes approximately 167$μ$W when optimizing parameters of a Convolutional Neural Network (CNN) while it is being trained for a character recognition task, observing no notable reduction in accuracy post-training.
description: Accepted by IEEE Transactions on Circuits and Systems Part II: Express Briefs
Energetics, skeletal dynamics and long-term predictions in Kolmogorov-Lorenz systems
Creators: name: Pelino, Vinicio
name: Maimone, Filippo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study a particular return map for a class of low dimensional chaotic models called Kolmogorov Lorenz systems, which received an elegant general Hamiltonian description and includes also the famous Lorenz63 case, from the viewpoint of energy and Casimir balance. In particular it is considered in detail a subclass of these models, precisely those obtained from the Lorenz63 by a small perturbation on the standard parameters, which includes for example the forced Lorenz case in Ref.[6]. The paper is divided into two parts. In the first part the extremes of the mentioned state functions are considered, which define an invariant manifold, used to construct an appropriate Poincare surface for our return map. From the experimental observation of the simple orbital motion around the two unstable fixed points, together with the circumstance that these orbits are classified by their energy or Casimir maximum, we construct a conceptually simple skeletal dynamics valid within our sub class, reproducing quite well the Lorenz map for Casimir. This energetic approach sheds some light on the physical mechanism underlying regime transitions. The second part of the paper is devoted to the investigation of a new type of maximum energy based long term predictions, by which the knowledge of a particular maximum energy shell amounts to the knowledge of the future (qualitative) behaviour of the system. It is shown that, in this respect, a local analysis of predictability is not appropriate for a complete characterization of this behaviour. A perspective on the possible extensions of this type of predictability analysis to more realistic cases in (geo)fluid dynamics is discussed at the end of the paper.
description: 21 pages, 14 figures
A Survey on Anomaly Detection for Technical Systems using LSTM Networks
Creators: name: Lindemann, Benjamin
name: Maschler, Benjamin
name: Sahlab, Nada
name: Weyrich, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Anomalies represent deviations from the intended system operation and can lead to decreased efficiency as well as partial or complete system failure. As the causes of anomalies are often unknown due to complex system dynamics, efficient anomaly detection is necessary. Conventional detection approaches rely on statistical and time-invariant methods that fail to address the complex and dynamic nature of anomalies. With advances in artificial intelligence and increasing importance for anomaly detection and prevention in various domains, artificial neural network approaches enable the detection of more complex anomaly types while considering temporal and contextual characteristics. In this article, a survey on state-of-the-art anomaly detection using deep neural and especially long short-term memory networks is conducted. The investigated approaches are evaluated based on the application scenario, data and anomaly types as well as further metrics. To highlight the potential of upcoming anomaly detection techniques, graph-based and transfer learning approaches are also included in the survey, enabling the analysis of heterogeneous data as well as compensating for its shortage and improving the handling of dynamic processes.
description: 14 pages, 6 figures, 4 tables. Accepted for publication by Computers in Industry
Hamiltonian BFV-BRST Quantization for the Systems with Unfree Gauge Symmetry
Creators: name: Abakumova, V. A.
name: Lyakhovich, S. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The BFV-BRST Hamiltonian quantization method is presented for the theories where the gauge parameters are restricted by differential equations. The general formalism is exemplified by the Maxwell-like theory of symmetric tensor field.
description: 8 pages, submitted to AIP Conference Proceedings
Management of Historical Information and Preference in Massive Datasets
Creators: name: Κοσματόπουλος, Ανδρέας Κ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Δυναμικά ερωτήματα
Ερώτημα k κορυφαίων σημείων κυριαρχίας
Εξελισσόμενο γράφημα
Χωρική αποδοτικότητα
Dynamic queries
Top-k dominating query
Evolving graphs
Space efficiency

description: H εκρηκτική αύξηση του ρυθμού παραγωγής δεδομένων η οποία παρατηρείται από πλήθος διαφορετικών πηγών, αποτελεί ένα χαρακτηριστικό φαινόμενο των τελευταίων δύο δεκαετιών. Ιστοσελίδες παροχής περιεχομένου, κοινωνικά δίκτυα καθώς επίσης και επιχειρήσεις ή οργανισμοί διαφόρων πεδίων όπως Αστρονομία και Γονιδιωματική έχουν καθημερινές ανάγκες αποθήκευσης και επεξεργασίας δεδομένων οι οποίες απαιτούν ένα σημαντικό πλήθος πόρων. Προκύπτει, επομένως, η ανάγκη εύρεσης λύσεων στα προβλήματα των σύγχρονων εφαρμογών οι οποίες θα χαρακτηρίζονται τόσο από χρονική όσο και από χωρική αποδοτικότητα. Για το σκοπό αυτό, η παρούσα διατριβή μελετάει ζητήματα που σχετίζονται με τον αποδοτικό υπολογισμό ερωτημάτων προτίμησης καθώς και την αποδοτική διαχείριση ιστορικής πληροφορίας προτείνοντας αλγορίθμους και δομές δεδομένων με γραμμικό χωρικό κόστος. Πιο συγκεκριμένα, το πρώτο μέρος της διατριβής ασχολείται με τη δυναμική διατήρηση των k κορυφαίων σημείων κυριαρχίας και τον υπολογισμό 3-πλευρών ερωτημάτων κορυφογραμμής σε πλήρως δυναμικά σύνολα δεδομένων. Το δεύτερο μέρος της διατριβής παρουσιάζει ένα πρότυπο σύστημα με το όνομα HiNode το οποίο διαχειρίζεται ιστορική πληροφορία σε ακολουθίες εξελισσόμενων γραφημάτων και χαρακτηρίζεται από ασυμπτωτικά βέλτιστο χωρικό κόστος. Τέλος, περιγράφονται δύο υλοποιήσεις για το σύστημα HiNode, που βασίζονται σε διαφορετικές υποκείμενες τεχνολογίες, οι οποίες ακολούθως αξιολογούνται πειραματικά.
description: A distinctive phenomenon of the past two decades has been the explosive data generation increase that is witnessed through a multitude of sources. Social networks and content provider websites as well as organizations and enterprises in other disciplines such as astronomy and genomics report daily data storage and data processing quantities of demanding volume. It is important, therefore, for solutions that target problems in this modern environment to be largely space efficient while retaining their time efficiency. To this end, this thesis tackles challenges related to preference query evaluation as well as historical information management by proposing algorithms and data structures that are linear in their space cost. More specifically, the first part of the thesis deals with the dynamic maintenance of top-k dominating points and the evaluation of dynamic 3-sided skyline queries in the presence of dataset updates. The second part of the thesis presents a prototype system termed HiNode that maintains graph historical information from evolving graph sequences in an asymptotically space-optimal manner. Finally, two implementations of HiNode with different underlying technologies are described in detail and are extensively evaluated.
A non-collimated 2-photon microscope for rapid and high-resolution 3D random access mesoscale imaging
Creators: name: Janiak, Filip
name: P. Bartel
name: M. Bale
name: T. Yoshimatsu
name: E. Komulainen
name: K. Staras
name: L.L Prieto-Godino
name: T. Euler
name: M. Maravall
name: Baden, Tom
Publisher: name: F1000 Research Limited
Year: 2019

description: Neural network computation occurs over a wide range of spatial scales including brain-wide circuits. Studying brain-wide computation therefore requires the ability to simultaneously monitor activity of arbitrary groups of neurons largely independent of their individual 3D positions. Using 2-photon imaging, this remains a challenging task: rapidly guiding the excitation laser between any two positions in 3D space is limited by the speed of movements of optical elements such as scanning mirrors or z-focusing mechanisms. Here, we use a simple optical trick to dramatically ameliorate this problem, thus allowing for rapid random-access 3D mesoscale imaging.
With an investment below £1,000, we simplified a standard Sutter-MOM 2-photon setup into a non-collimated design, thereby extending the standard 0.5 mm x-y field of view by 7-fold to 3.5 x 3.5 mm using a standard x20 objective. In hand, an electrically tunable lens (ETL) placed in the still expanding pre-galvo laser permits rapid z-travel by up to 0.6 mm. Together, these simple modifications allow running arbitrary 3D scan-paths across a volume of 3.5x3.5x0.6 mm with a maximal travel time of 2 ms between any two points. Our design opens up a wide range of eminently useful scan-options, including mesoscale random-access scans as well as vertical and 3D curved scans that acknowledge the 3D structure of biological samples. We demonstrate the capability of this setup using a wide range of examples from mice, zebrafish and Drosophila
Packing defects and the width of biopolymer bundles
Creators: name: Gov, Nir S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The formation of bundles composed of actin filaments and cross-linking proteins is an essential process in the maintenance of the cells' cytoskeleton. It has also been recreated by in-vitro experiments, where actin networks are routinely produced to mimic and study the cellular structures. It has long been observed that these bundles seem to have a well defined width distribution, which has not been adequately described theoretically. We propose here that packing defects of the filaments, quenched and random, contribute an effective repulsion that counters the cross-linking adhesion energy and leads to a well defined bundle width. This is a two-dimensional strain-field version of the classic Rayleigh instability of charged droplets.
Exact wave functions of electron in a quantum dot with account of the Rashba spin-orbit interaction
Creators: name: Kudryashov, V. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present the exact wave functions and energy levels of electron in a two-dimensional circular quantum dot in the presence of the Rashba spin-orbit interaction. The confinement is described by the realistic potential well of finite depth.
description: 4 pages, 2 figures, 1 table, some revisions in text, corrected misprints
Συνεργατικά Συστήματα Εργασίας στα Μ.Μ.Ε: Μοντελοποίηση και αξιολόγηση συνεργατικής διαδικτυακής πλατφόρμας με αυτοματοποιημένες τεχνικές επεξεργασίας δημοσιογραφικού περιεχομένου
Creators: name: Σιδηρόπουλος, Ευστάθιος A.
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Συνεργατικά Συστήματα Εργασίας
Συστήματα Διαχείρισης Γνώσης
Διαδικτυακή Δημοσιογραφία
Διαχείριση οπτικοακουστικού περιεχομένου
Computer Supported Collaborative Work
News Media
Mobile Journalism
News ecosystem

description: Το πεδίο της Συνεργατικής Εργασίας με Χρήση Υπολογιστή - Computer Supported Cooperative Work (CSCW) αποτέλεσε το αντικείμενο της παρούσας διατριβής και συγκεκριμένα η χρήση και η επίδραση ορισμένων τεχνολογικών εργαλείων και υπηρεσιών του διαδικτύου καθώς και αυτοματοποιημένων σημασιολογικών τεχνικών για την επεξεργασία δημοσιογραφικού περιεχομένου από τους δημοσιογράφους. Οι βασικοί άξονες που επικεντρώθηκε η μελέτη και η έρευνα ήταν α) παράγοντες που επηρεάζουν τη χρήση συνεργατικών τεχνολογιών στην εργασία και την εκπαίδευση στα ΜΜΕ, β) σχεδιασμός και αξιολόγηση συνεργατικής διαδικτυακής πλατφόρμας με σημασιολογικές τεχνικές επεξεργασίας αρχείων ήχου, γ) η εξέλιξη ενός ψηφιακού οικοσυστήματος των ΜΜΕ με υπηρεσίες ανάκτησης και διαχείρισης πληροφοριών βασισμένες στη γνώση για την έκδοσης ειδήσεων. Στην παρούσα διδακτορική έρευνα επιχειρήθηκε η απεικόνιση της κατάστασης των ΜΜΕ, η καταγραφή των νέων προκλήσεων που αντιμετωπίζουν οι δημοσιογράφοι λόγω των τεχνολογικών εξελίξεων και η μοντελοποίηση και αξιολόγηση μιας συνεργατικής διαδικτυακής πλατφόρμας με αυτοματοποιημένες τεχνικές για την επεξεργασία δημοσιογραφικού περιεχομένου με στόχο τη εξέλιξη ενός ψηφιακού οικοσυστήματος.
description: Over the past decade, mobile news production has had a growing prevalence and has been established as a new type by modern journalism industry. Mobile journalism (mojo) is an evolving form of reporting in which people use only a smartphone to create and file stories, and it has been gaining ground during the last decade. This thesis aims to design a model of a collaborative web-based platform with automated semantic and intelligent processes for journalistic content. The basic axes are: a) the adoption of Computer Supported Collaborative Work (CSCW) practices in the field of Journalism Education, b) the study of journalists’ and media professionals’ beliefs regarding Computer Supported Collaborative Work (CSCW) and groupware effectiveness in work routines, c) the design and evaluation of a collaborative platform with automated audio semantic and intelligent processing techniques in the New Media Environment, d) the examination of the difficulties, issues, and challenges in real-world mojo scenarios, analyzing the efficacy of a prototype machine-assisted reporting services (MoJo-MATE), e) modelling a collaborative mobile platform for knowledge-based information retrieval and filtering from news publishing in the media ecosystem
Sesquiterpenes from the endophytic fungus Periconia sp. F-31
Creators: name: Liu, Ji-Mei
name: Zhang, De-Wu
name: Du, Wen-Yu
name: Zhang, Min
name: Zhao, Jin-Lian
name: Chen, Ri-Dao
name: Xie, Ke-Bo
name: Dai, Jun-Gui
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified

description: One new eremophilane sesquiterpene periconianone L (1), together with four known guaiane-type sesquiterpenes 4,10,11-trihydroxyguaiane (2), (−)-guai-1(10)-ene-4α,11-diolhydroxymecuration (3), guaidiol A (4), and epi-guaidiol A (5) were isolated from the endophytic fungus Periconia sp. F-31. The structure of the new compound was established by spectroscopic methods, including UV, IR, HRESIMS, and extensive NMR techniques. Compound 3 was isolated as natural product for the first time.
Changing Perception of Indian Rural Consumers towards Packaged Food Products: A Literature Review
Creators: name: Shahare, Padmakar
Publisher: name: figshare
Year: 2021
Subjects: subject: 150501 Consumer-Oriented Product or Service Development
subject: FOS: Economics and business
subject: 150401 Food and Hospitality Services
subject: 150504 Marketing Measurement

description: This study is based on a secondary data collected from the various research manuscripts available online and offline in article published, books and magazines
Global triplewise information trade-off in quantum measurement
Creators: name: Hong, Seongjin
name: Kim, Yong-Su
name: Cho, Young-Wook
name: Kim, Jaewan
name: Lee, Seung-Woo
name: Lim, Hyang-Tag
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: State disturbance by a quantum measurement is at the core of foundational quantum physics and constitutes a fundamental basis of secure quantum information processing. While quantifying an information-disturbance relation has been a long-standing problem, recently verified reversibility of a quantum measurement requires to refine such a conventional information trade-off toward a complete picture of information conservation in quantum measurement. Here we experimentally demonstrate complete trade-off relations among all information contents, i.e., information gain, disturbance and reversibility in quantum measurement. By exploring various quantum measurements applied on a photonic qutrit, we observe that the information of a quantum state is split into three distinct parts accounting for the extracted, disturbed, and reversible information. We verify that such different parts of information are in trade-off relations not only pairwise but also globally all-at-once, and find that the global trade-off relation is tighter than any of the pairwise relations. Finally, we realize optimal quantum measurements that inherently preserve quantum information without loss of information, which offer wider applications in measurement-based quantum information processing.
description: 8 pages, 4 figures, Supplementary Note
title: Seasonal And Spatial Changes In The Abundance And Distribution Of Eledone Moshata (Cephalopoda: Octopoda), In The South Aegean Sea (Eastern Mediterranean)
Creators: name: Lefkaditou, E.
name: Siapatis, A.
name: Papaconstantinou, C.
Publisher: name: ASC 1998 - M
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Seasonal and spatial variations in the abnndance, distribution and size composition of Eledone moschata , Lamarck (1799) are studied in the insular area of the South Aegean Sea. Samples were collected during four trawl surveys carried out between September 1995 and October 1996, over a total of 51 stations between 30 and 635 m of depth. Eledone moschata was caught up tol50 m of depth aronnd the Kyklades islands (western zone), where as, over the wider shelf region of Dodekanisos islands ( eastern zone) up to 90 m of depth. Size frequency analysis indicated a series of microcohorts entering the exploited stock in sequence, during almost the whole year. At least three sub-populations have been shown to occur respectively in Dodekanisos, North and South Kyklades areas, by application of Kolmogorov-Smirnov test on length frequency distributions of the specimens, corresponding to different topographic and hydrological characteristics. The greater species abnndance and recruitment intensity observed in Dodekanisos are probably related to the seasonal upwelling, generated by Etesian winds during summer in the eastern Aegean Sea. In the western zone, a series of individual spawning areas seem to occur, in the abrupt coastal waters around Kyklades islands, where slight diversification in periods of spawning and recruitment may result a greater number of sub-cohorts. Similar suggestions made for Todarodes pacificus distributed aronnd Japanese islands, indicate that this is probably a common adaptive strategy of cephalopod populations in insular areas.
Top Quark Spin Polarization in e γCollision
Creators: name: Sahin, B.
name: Sahin, I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the degree of spin polarization of single top quarks in the $eγ$ collision via the process $e^{+} γ\to t \bar{b} \bar{ν_{e}}$ with center of mass energies $\sqrt{s}$=0.5, 1 and 1.5 TeV of the parental linear $e^{+}e^{-}$ collider. Dominant spin fractions and spin asymmetries for the various top quark spin bases are investigated. We show that $e^{+}$-beam direction is the favorite top quark spin decomposition axis. It is found to be comparable with the ones in $pp$ and $ep$ collisions.
description: 5 pages, 3 figures
title: Rhodium catalysed asymmetric synthesis of tertiary amines
Creators: name: Gilbert, Sophie Hannah
Publisher: name: University of St Andrews
Year: 2020

description: The asymmetric synthesis of tertiary amines is a highly desirable goal, but far fewer efficient synthetic methods exist for their synthesis, relative to primary and secondary amines. A possible atom-efficient method of tertiary amine formation is catalytic hydrogenation. Despite the demand, there are only a few reported examples of asymmetric enamine hydrogenation, and none of these conditions are efficient enough to be viable for industrial processes. Until 2019, there were no reported examples of tertiary amine formation by using direct asymmetric reductive amination using H₂ as the reductant. This thesis describes the development of both enantioselective and diastereoselective reductive aminations, using hydrogen gas and homogeneous rhodium catalysts. The enantioselective reductive amination uses an electron deficient phanephos ligand and reduces bicyclic aryl ketones at low catalyst loadings but moderate selectivity. The diastereoselective reductive amination uses electron deficient monophosphines as ligands and includes many chiral 3-substituted cyclic ketones in the substrate scope, mainly 3- arylcyclohexanones. These 3-arylcyclohexanones substrates were synthesised by rhodium catalysed conjugate addition. This enantioselective conjugate addition was combined with our diastereoselective reductive amination, to form a highly stereoselective one-pot process. The rhodium used in the conjugate addition was recycled for the reductive amination step using an ‘assisted tandem catalysis’ strategy. The rhodium catalyst was modified in situ by the sequential addition of a monophosphine ligand, allowing it to catalyse the second step. This process formed a chiral tertiary amine with high selectivity and conversion. While developing this one-pot process, BOBPHOS, a phospholane-phosphite ligand, was identified as a highly active ligand in rhodium catalysed conjugate additions. The potential of BOBPHOS-Rh catalysed conjugate additions of challenging substrates like piperidones, coumarins and heteroarylboronic acids was examined, leading to improved protocols.
title: Growth Of Octopus (Octopus Vulgaris) Males And Females Under Culture Conditions
Creators: name: Sanchez, F.J.
name: Iglesias, J.
name: Moxica, C.
name: Otero, J.J.
Publisher: name: ASC 1998 - M
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.The common octopus ( Octopus vulgaris) is considered to be a promising species for commercial culture in various countries where it is a highly appreciated food. It has a very high growth rate and adapts perfectly to captivity conditions. The goal of this work was to improve the yield of the ongrowing process cultivating males and females separately, in this way avoiding the fertilization and the following process of natural mortality of the females. Fifty seven wild octopus were separated by sex and transferred into two tanks where they were grown for five months. Initial mean weights for males and females were 637.0 gr. and 657.9 gr. respectively, reaching fmal mean weights of 3624.0 gr. and 2780.0 gr. respectively. Food consisted of frozen decapod crustaceans and the daily ration ranged between 7% and 3 .5% of their total biomass. The food conversion index was 2.1 for males and 4.2 for females, and the mortality rate was similar in the two groups.
title: Observations About The Influence Of Temperature On The Length Of The Octopus Vulgaris' Embryonic Development (Senegal, West Africa)
Creators: name: Caveriviere, Alain
name: Domain, François
name: Oiallo, Anis
Publisher: name: ASC 1998 - M
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.In Senegal, observations were made in the years 1997-1998 about the length of embryonic development of Octopus vulgaris. It concerns the eggs wh'ich have been laid by 2 females in open sea and 14 females in concrete tanks. Hatching occurs at 27°C after 15-42 days, the length is 29-49 days at 22-23°C, 57-65 days at 21 °C and 80-87 days at 17° C.