cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Discovering Network Structure Beyond Communities
Creators: name: Nishikawa, Takashi
name: Motter, Adilson E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Social and Information Networks (cs.SI)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: To understand the formation, evolution, and function of complex systems, it is crucial to understand the internal organization of their interaction networks. Partly due to the impossibility of visualizing large complex networks, resolving network structure remains a challenging problem. Here we overcome this difficulty by combining the visual pattern recognition ability of humans with the high processing speed of computers to develop an exploratory method for discovering groups of nodes characterized by common network properties, including but not limited to communities of densely connected nodes. Without any prior information about the nature of the groups, the method simultaneously identifies the number of groups, the group assignment, and the properties that define these groups. The results of applying our method to real networks suggest the possibility that most group structures lurk undiscovered in the fast-growing inventory of social, biological, and technological networks of scientific interest.
description: Software implementing the method described in the paper is available at http://purl.oclc.org/net/find_structural_groups and is accompanied by a demo video available at http://www.nature.com/srep/2011/111109/srep00151/extref/srep00151-s2.mov
On Character Varieties with Non-Connected Structure Groups
Creators: name: Shu, Cheng
Publisher: name: arXiv
Year: 2019
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We define character varieties with non-connected structure groups of finitely presented discrete groups and study some basic aspects, such as generic conjugacy classes and relation with fixed points in character varieties with connected structure groups. In the process, we give the classification of the isomorphism classes of the semi-direct products $G\rtimesΓ$, with fixed $G$ and $Γ$.
description: Final version
Quantum critical scaling and the Gross-Neveu model in 2+1 dimensions
Creators: name: Chamati, H.
name: Tonchev, N. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The quantum critical behavior of the 2+1 dimensional Gross--Neveu model in the vicinity of its zero temperature critical point is considered. The model is known to be renormalisable in the large $N$ limit, which offers the possibility to obtain expressions for various thermodynamic functions in closed form. We have used the concept of finite--size scaling to extract information about the leading temperature behavior of the free energy and the mass term, defined by the fermionic condensate and determined the crossover lines in the coupling ($\g$) -- temperature ($T$) plane. These are given by $T\sim|\g-\g_c|$, where $\g_c$ denotes the critical coupling at zero temperature. According to our analysis no spontaneous symmetry breaking survives at finite temperature. We have found that the leading temperature behavior of the fermionic condensate is proportional to the temperature with the critical amplitude $\frac{\sqrt{5}}3π$. The scaling function of the singular part of the free energy is found to exhibit a maximum at $\frac{\ln2}{2π}$ corresponding to one of the crossover lines. The critical amplitude of the singular part of the free energy is given by the universal number $\frac13[\frac1{2π}ζ(3)-\mathrm{Cl}_2(\fracπ3)]=-0.274543...$, where $ζ(z)$ and $\mathrm{Cl}_2(z)$ are the Riemann zeta and Clausen's functions, respectively. Interpreted in terms the thermodynamic Casimir effect, this result implies an attractive Casimir "force". This study is expected to be useful in shedding light on a broader class of four fermionic models.
description: 6 pages, 3 figures
The Honey Trap
Creators: name: Wagner, Michael F.
Publisher: name: Akademisk kvarter | Academic Quarter
Year: 2015

description: A permanent love affair between man and his automobile has been going on for more than a century. A love affair based on the promise of independence and freedom incarnated by the car. The paradox of this affair is the increasing loss of freedom and independence caused by the fast growing number of automobiles on the roads every year and the inherent traffic congestion that follows. The article traces this erotic relationship between man and car from the beginning 1920ies to the latest climax in 2012 with the refusal of a congestion zone (betalingsring) in Copenhagen to relieve the traffic congestion in the commuter traffic. The emotional relationship between man and car has triumphed once again over the rational considerations in society. Everybody is still stuck for hours in traffic jams every day, sitting caught in this honey trap the drivers preserved their freedom and autonomy at all costs. Come hell or high water.
description: Akademisk kvarter | Academic Quarter, Fritid | Leisure, Vol. 11
Designing and Evaluating a Lightweight Video Player for Language Learning
Creators: name: Hu, Sathaporn
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Computer Science
subject: Computer-Assisted Language Learning
subject: Video Player

description: Watching foreign language videos is a popular and convenient strategy used by many people for learning a new language. However, traditional video players, such as the YouTube player, are not designed to support language learning. We created two video players to explore and to address the issues of using traditional players as a language learning tool. Our players specifically target casual language learners. After evaluating the first player, we found that a traditional player makes it difficult for learners to (1) adjust the level of difficulty, (2) recover missed information, and (3) assess learning progress. We then created the second player to address these issues. The results of the evaluation of the second player demonstrate that people found the player to be helpful for language learning. We also found common usage patterns in the results and opportunities for future improvement.
A new hybrid jpeg image compression scheme using symbol reduction technique
Creators: name: Kumar, Bheshaj
name: Thakur, Kavita
name: Sinha, G. R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Multimedia (cs.MM)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Lossy JPEG compression is a widely used compression technique. Normally the JPEG standard technique uses three process mapping reduces interpixel redundancy, quantization, which is lossy process and entropy encoding, which is considered lossless process. In this paper, a new technique has been proposed by combining the JPEG algorithm and Symbol Reduction Huffman technique for achieving more compression ratio. The symbols reduction technique reduces the number of symbols by combining together to form a new symbol. As a result of this technique the number of Huffman code to be generated also reduced. It is simple fast and easy to implement. The result shows that the performance of standard JPEG method can be improved by proposed method. This hybrid approach achieves about 20% more compression ratio than the Standard JPEG.
description: 11 pages,9 figures, SIP 2012 held on 3-4 January 2012,at Bangalore,India. arXiv admin note: text overlap with standard references on JPEG without attribution
Additional file 2 of The longitudinal associations between change in physical activity and cognitive functioning in older adults with chronic illness (es)
Creators: name: Volders, Esmee
name: de Groot, Renate H. M.
name: Bolman, Catherine A. W.
name: Lechner, Lilian
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 2.
Expanding universe as a classical solution in the Lorentzian matrix model for nonperturbative superstring theory
Creators: name: Kim, Sang-Woo
name: Nishimura, Jun
name: Tsuchiya, Asato
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: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Recently we have shown by Monte Carlo simulation that expanding (3+1)-dimensional universe appears dynamically from a Lorentzian matrix model for type IIB superstring theory in (9+1)-dimensions. The mechanism for the spontaneous breaking of rotational symmetry relies crucially on the noncommutative nature of the space. Here we study the classical equations of motion as a complementary approach. In particular, we find a unique class of SO(3) symmetric solutions, which exhibits the time-dependence compatible with the expanding universe. The space-space noncommutativity is exactly zero, whereas the space-time noncommutativity becomes significant only towards the end of the expansion. We interpret the Monte Carlo results and the classical solution as describing the behavior of the model at earlier time and at later time, respectively.
description: 4 pages, 2 figures
Digitalt dilemma
Creators: name: Bundgaard, Trine
name: Poulsen, Bo
Publisher: name: Akademisk kvarter | Academic Quarter
Year: 2015

description: Museum visits have been an integral part of the Danish culture of leisure for more than a century. Objects representing the past have been displayed for the purpose of education and national and regional identity building. More recently, focus has shifted towards the goals of the experience economy, raising curiosity and excitement on behalf of the spectator. In fact the former spectator is now an active participant in modern museum curation, and in particular this has come by through the advent of the digital era.

Investigating the exhibition, Tro & Overtro at the Sæby Museum, this article explores the way in which a partly digital exhibition interacts with its audience. This interactive museum experience is investigated using interviews, document based analysis and participatory observation. Results reveal that the exhibit, over all had a strong appeal to schoolchildren, while the more mature museumgoers became somewhat alienated from the digital aspects of the exhibit.
description: Akademisk kvarter | Academic Quarter, Fritid | Leisure, Vol. 11
Conditions for the difference set of a central Cantor set to be a Cantorval
Creators: name: Nowakowski, Piotr
name: Filipczak, Tomasz
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 28A80, 05B10

description: Let $C(λ)\subset \lbrack 0,1]$ denote the central Cantor set generated by a sequence $ λ= \left( λ_{n} \right) \in \left( 0,\frac{1}{2} \right) ^{\mathbb{N}}$. By the known trichotomy, the difference set $ C(λ)-C(λ)$ of $C(λ)$ is one of three possible sets: a finite union of closed intervals, a Cantor set, and a Cantorval. Our main result describes effective conditions for $(λ_{n})$ which guarantee that $C(λ)-C(λ)$ is a Cantorval. We show that these conditions can be expressed in several equivalent forms. Under additional assumptions, the measure of the Cantorval $C(λ)-C(λ)$ is established. We give an application of the proved theorems for the achievement sets of some fast convergent series.
description: 19 pages
Exploring Social Cognition as a Risk Factor for Peer Victimization for Students with Autism Spectrum Disorder
Creators: name: Fenwick, Melanie
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Educational Psychology
subject: HFASD
subject: peer victimization
subject: theory of mind
subject: Emotional Intelligence

description: In light of striking prevalence rates and adverse effects of bullying on interpersonal, psychological, and academic functioning, this study investigated a potentially influential risk factor, social cognition, for peer victimization of the uniquely at-risk population of students with Autism Spectrum Disorder (ASD). Two of the most common constructs that comprise social cognition include Theory of Mind (ToM) and Emotional Intelligence (EI). Forty-five students with High Functioning ASD (HFASD) completed measures assessing ToM, EI, and the prevalence and frequency of Bullying. Parent-report was also provided for the measure of bullying. According to student-report, verbal bullying was endorsed most (26.7%), followed by physical (17.8%) and social (15.6%) forms of bullying, while social bullying of student participants was endorsed most by parents (57.8%), followed by verbal (55.6%) and disability (35.6%) forms of bullying. Results indicated that neither ToM or EI predicted the prevalence or frequency of peer victimization for students with HFASD. Research efforts should continue to explore relevant risk factors for students with HFASD to inform policy and program development to effectively support this vulnerable group of students.
Investigation and evaluation of a 3D-printed optical modified cultivation vessel for improved scattered light measurement of biotechnologically relevant organisms
Creators: name: Rehfeld, Johanna S.
name: Kuhnke, Louis M.
name: Ude, Christian
name: John, Gernot T.
name: Beutel, Sascha
Publisher: name: Weinheim : Wiley-VCH
Year: 2023
Subjects: subject: 3D-printing
subject: mammalian cell cultivation
subject: microbial cultivation
subject: online monitoring
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: In the field of bioprocess development miniaturization, parallelization and flexibility play a key role reducing costs and time. To precisely meet these requirements, additive manufacturing (3D-printing) is an ideal technology. 3D-printing enables rapid prototyping and cost-effective fabrication of individually designed devices with complex geometries on demand. For successful bioprocess development, monitoring of process-relevant parameters, such as pH, dissolved oxygen (DO), and biomass, is crucial. Online monitoring is preferred as offline sampling is time-consuming and leads to loss of information. In this study, 3D-printed cultivation vessels with optical prisms are evaluated for the use in upstream processes of different industrially relevant microorganisms and cell lines. It was shown, that the 3D-printed optically modified well (OMW) is of benefit for a wide range of biotechnologically relevant microorganisms and even for mammalian suspension cells. Evaluation tests with Escherichia coli, Bacillus subtilis, Saccharomyces cerevisiae, and Chinese hamster ovary (CHO) cells were performed, providing highly reproducible results. Growth behavior of OMW cultures was comparable to behavior of shake flask (SF) cultivations and the signal to noise ratio in online biomass measurement was shown to be reduced up to 95.8% by using the OMW. Especially the cultivation phases with low turbidity respective optical densities below 1.0 rel.AU could be monitored accurately for the first time. Furthermore, it was demonstrated that the 3D-printed optics are transferable to different well geometries and sizes, enabling efficient biomass monitoring for individual requirements with tailor-made 3D-printed cultivation vessels in small scale.
Complexity and Approximation for Discriminating and Identifying Code Problems in Geometric Setups
Creators: name: Dey, Sanjana
name: Foucaud, Florent
name: Nandy, Subhas C
name: Sen, Arunabha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: We study geometric variations of the discriminating code problem. In the \emph{discrete version} of the problem, a finite set of points $P$ and a finite set of objects $S$ are given in $\mathbb{R}^d$. The objective is to choose a subset $S^* \subseteq S$ of minimum cardinality such that for each point $p_i \in P$, the subset $S_i^* \subseteq S^*$ covering $p_i$ satisfies $S_i^*\neq \emptyset$, and each pair $p_i,p_j \in P$, $i \neq j$, we have $S_i^* \neq S_j^*$. In the \emph{continuous version} of the problem, the solution set $S^*$ can be chosen freely among a (potentially infinite) class of allowed geometric objects. In the 1-dimensional case ($d=1$), the points in $P$ are placed on a horizontal line $L$, and the objects in $S$ are finite-length line segments aligned with $L$ (called intervals). We show that the discrete version of this problem is NP-complete. This is somewhat surprising as the continuous version is known to be polynomial-time solvable. Still, for the 1-dimensional discrete version, we design a polynomial-time $2$-approximation algorithm. We also design a PTAS for both discrete and continuous versions in one dimension, for the restriction where the intervals are all required to have the same length. We then study the 2-dimensional case ($d=2$) for axis-parallel unit square objects. We show that both continuous and discrete versions are NP-complete, and design polynomial-time approximation algorithms that produce $(16\cdot OPT+1)$-approximate and $(64\cdot OPT+1)$-approximate solutions respectively, using rounding of suitably defined integer linear programming problems. We show that the identifying code problem for axis-parallel unit square intersection graphs (in $d=2$) can be solved in the same manner as for the discrete version of the discriminating code problem for unit square objects.
Hamburg Open Science: Forschungsdatenmanagement: Arbeitsplan 2019
Creators: name: Jürs, Patrick
name: Pinarak, Hakan
name: Quenum, Eugène
name: Rajski, Beate
name: Wörner, Kai
Publisher: name: Zenodo
Year: 2018
Subjects: project
work plan
research data managment
Hamburg

description: Work plan 2019 for the project research data management within the programme Hamburg Open Science
Debreu's open gap lemma for semiorders
Creators: name: Estevan, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Theoretical Economics (econ.TH)
subject: FOS: Economics and business

description: The problem of finding a (continuous) utility function for a semiorder has been studied since in 1956 R.D. Luce introduced in \emph{Econometrica} the notion. There was almost no results on the continuity of the representation. A similar result to Debreu's Lemma, but for semiorders, was never achieved. Recently, some necessary conditions for the existence of a continuous representation as well as some conjectures were presented by A. Estevan. In the present paper we prove these conjectures, achieving the desired version of Debreu's Open Gap Lemma for bounded semiorders. This result allows to remove the open-closed and closed-open gaps of a subset $S\subseteq \mathbb{R}$, but now keeping the constant threshold, so that $x+1
The Socialist Modern at Rest and Play
Creators: name: Winstanley-Chesters, Robert
Publisher: name: Akademisk kvarter | Academic Quarter
Year: 2015

description: Conventionally conceived of as entirely lacking in frivolity or playfulness, its’ citizens time and energy and its’ geographic spaces harnessed only to the prerogatives of political and military production, North Korea is regarded as the ‘terra nullis’ of leisure activity. However in the light of the Korean peninsula’s forceful encounter with Japanese Imperialist modernity, this paper examines connections between the introduction of sporting, leisurely and non-productive modes of production and relation at the behest of colonialism and North Korea’s conception of a leisure fit for the socialist modern. Far from a blank leisure canvas, Pyongyang’s political and cultural repertoire of praxis has required and supported an extensive network of narrative, ideology, infrastructure and facilities focused on politically appropriate sport, and entertainment which embedded and enmeshed leisure and non-productive time at the heart of Pyongyang’s acutely charismatic and theatric political form.
description: Akademisk kvarter | Academic Quarter, Fritid | Leisure, Vol. 11
Low-cost and automated phenotyping system “Phenomenon” for multi-sensor in situ monitoring in plant in vitro culture
Creators: name: Bethge, Hans
name: Winkelmann, Traud
name: Lüdeke, Patrick
name: Rath, Thomas
Publisher: name: London : BioMed Central
Year: 2023
Subjects: subject: Chlorophyll fluorescence
subject: Image analysis
subject: Laser distance sensor
subject: Non-destructive growth analysis
subject: Plant tissue culture
subject: RGB imaging
subject: Spectrometer
subject: Thermal sensor
subject: Dewey Decimal Classification::500 | Naturwissenschaften::580 | Pflanzen (Botanik)
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: Background: The current development of sensor technologies towards ever more cost-effective and powerful systems is steadily increasing the application of low-cost sensors in different horticultural sectors. In plant in vitro culture, as a fundamental technique for plant breeding and plant propagation, the majority of evaluation methods to describe the performance of these cultures are based on destructive approaches, limiting data to unique endpoint measurements. Therefore, a non-destructive phenotyping system capable of automated, continuous and objective quantification of in vitro plant traits is desirable. Results: An automated low-cost multi-sensor system acquiring phenotypic data of plant in vitro cultures was developed and evaluated. Unique hardware and software components were selected to construct a xyz-scanning system with an adequate accuracy for consistent data acquisition. Relevant plant growth predictors, such as projected area of explants and average canopy height were determined employing multi-sensory imaging and various developmental processes could be monitored and documented. The validation of the RGB image segmentation pipeline using a random forest classifier revealed very strong correlation with manual pixel annotation. Depth imaging by a laser distance sensor of plant in vitro cultures enabled the description of the dynamic behavior of the average canopy height, the maximum plant height, but also the culture media height and volume. Projected plant area in depth data by RANSAC (random sample consensus) segmentation approach well matched the projected plant area by RGB image processing pipeline. In addition, a successful proof of concept for in situ spectral fluorescence monitoring was achieved and challenges of thermal imaging were documented. Potential use cases for the digital quantification of key performance parameters in research and commercial application are discussed. Conclusion: The technical realization of “Phenomenon” allows phenotyping of plant in vitro cultures under highly challenging conditions and enables multi-sensory monitoring through closed vessels, ensuring the aseptic status of the cultures. Automated sensor application in plant tissue culture promises great potential for a non-destructive growth analysis enhancing commercial propagation as well as enabling research with novel digital parameters recorded over time.
Where ever I lay my device, that’s my home
Creators: name: Andersen, Tem Frank
name: Jensen, Thessa
Publisher: name: Akademisk kvarter | Academic Quarter
Year: 2015

description: The key interest of this article is the concept of domestication as a central framework for both sociological and ethnographic media studies. Domestication translates into that process through which both new informations and communication technologies, interactive digital media and wearable devices are ”fitted” or ”knitted” into the fabric of everyday domestic life. The purpose of the article is to investigate if changes in the media technologies have any impact on the analytical framework of domestication: Does the notion of domestication still offer a meaningful account for the use of mobile media such as iPods, iPads and iPhones, and the flows of applications and content? The theoretical context of the article consists of the British tradition of media and information technology studies (Silverstone & Hirsch 1992, Berker et al. 2006) and the American everyday life studies of mobile telephones (Ling 2004, Ling 2008). In relation to this journal’s theme on Leisure the article assumes that domestication is both a process that happens in the context of the domestic sphere and as such is a central part of the structural dimension of doing leisure. Leisure is communicating with your boyfriend on a ”forbidden” mobile telephone, as well as using the mobile phone in rituals of both domestic consumption and individual uses. But what happens with domestication when the dominating context for leisure use of mobile phones or touch media no longer is the home or the household, but rather the passages and inbetweens we move through in our everyday life movements?
description: Akademisk kvarter | Academic Quarter, Fritid | Leisure, Vol. 11
Additional file 3 of The longitudinal associations between change in physical activity and cognitive functioning in older adults with chronic illness (es)
Creators: name: Volders, Esmee
name: de Groot, Renate H. M.
name: Bolman, Catherine A. W.
name: Lechner, Lilian
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 3.
Hybridizing PSM and RSM Operator for Solving NP-Complete Problems: Application to Travelling Salesman Problem
Creators: name: Abdoun, Otman
name: Tajani, Chakir
name: Abouchabka, Jaafar
Publisher: name: arXiv
Year: 2012
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: In this paper, we present a new mutation operator, Hybrid Mutation (HPRM), for a genetic algorithm that generates high quality solutions to the Traveling Salesman Problem (TSP). The Hybrid Mutation operator constructs an offspring from a pair of parents by hybridizing two mutation operators, PSM and RSM. The efficiency of the HPRM is compared as against some existing mutation operators; namely, Reverse Sequence Mutation (RSM) and Partial Shuffle Mutation (PSM) for BERLIN52 as instance of TSPLIB. Experimental results show that the new mutation operator is better than the RSM and PSM.
description: ISSN (Online): 1694-0814
A mobile antineutrino detector with plastic scintillators
Creators: name: Kuroda, Yasuhiro
name: Oguri, Shugo
name: Kato, Yo
name: Nakata, Ryoko
name: Inoue, Yoshizumi
name: Ito, Chikara
name: Minowa, Makoto
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We propose a new type segmented antineutrino detector made of plastic scintillators for the nuclear safeguard application. A small prototype was built and tested to measure background events. A satisfactory unmanned field operation of the detector system was demonstrated. Besides, a detailed Monte Carlo simulation code was developed to estimate the antineutrino detection efficiency of the detector.
description: 23 pages, 11 figures; accepted for publication in Nuclear Instruments and Methods in Physics Research A
Transitive Lie algebras of vector fields---an overview
Creators: name: Draisma, Jan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 17B66

description: This overview paper is intended as a quick introduction to Lie algebras of vector fields. Originally introduced in the late 19th century by Sophus Lie to capture symmetries of ordinary differential equations, these algebras, or infinitesimal groups, are a recurring theme in 20th-century research on Lie algebras. I will focus on so-called transitive or even primitive Lie algebras, and explain their theory due to Lie, Morozov, Dynkin, Guillemin, Sternberg, Blattner, and others. This paper gives just one, subjective overview of the subject, without trying to be exhaustive.
description: 20 pages, written after the Oberwolfach mini-workshop "Algebraic and Analytic Techniques for Polynomial Vector Fields", December 2010 2nd version, some minor typo's corrected and some references added
Biochar synthesis from mineral and ash-rich waste biomass, part 2: characterization of biochar and co-pyrolysis mechanism for carbon sequestration
Creators: name: Nair, Rahul Ramesh
name: Kißling, Patrick A.
name: Marchanka, Alexander
name: Lecinski, Jacek
name: Turcios, Ariel E.
name: Shamsuyeva, Madina
name: Rajendiran, Nishanthi
name: Ganesan, Sathish
name: Srinivasan, Shanmugham Venkatachalam
name: Papenbrock, Jutta
name: Weichgrebe, Dirk
Publisher: name: Tainan : Inst.
Year: 2023
Subjects: subject: Biochar
subject: Carbon sequestration
subject: Co-pyrolysis
subject: Mineral and ash-rich biomass
subject: Waste management
subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk

description: The increase in mineral and ash-rich waste biomass (MWB) generation in emerging economies poses critical environmental problems and bottlenecks the solid waste and wastewater treatment systems. Transforming these MWB such as sewage sludge from wastewater treatment (SSW) to biochar can be a sustainable method for their disposal and resource recovery. However, such biochar has limited applicability due to the relatively low organic content and possibly contaminated nature of SSW. This may be offset through combined pyrolysis with other MWB, which can also support municipal solid waste management. Studies on this MWB co-pyrolysis are lacking and have not yet seen successful long-term implementation. This work is the second part of authors’ research encompassing an analytical and lab-scale investigation of biochar production from MWB through pyrolysis for the case of Chennai city, India. Here, the physicochemical properties of biochar derived from lab-scale co-pyrolysis of SSW with other MWB such as anaerobic digestate from waste to energy plants of food, kitchen or market waste fermentation, and banana peduncles (BP) collected from vegetable markets and their thermolysis mechanism are comprehensively investigated for purpose of carbon sequestration. Also, a novel preliminary investigation of the effect of sample weight (scaling effect) on the analytical pyrolysis of biomass (BP as model substrate) is undertaken to elucidate its impact on the heat of pyrolysis and carbon distribution in resultant biochar. The maximum carbon sequestration potential of the derived biochar types is 0.22 kg CO2 kg−1 biomass. The co-pyrolysis of MWB is exothermic and governed by the synergetic effects of the components in blends with emission profiles following the order CO2 > CH4 > CO > NH3. Co-pyrolysis reduced the heavy metal enrichment in SSW biochar. The derived biochars can be an immediate source of N, P and S in nutrient-deficient acidic soils. The biochar has only up to 4-ring polyaromatic compounds and a residence time longer than 1 h at 500 °C is necessary to improve carbonization. The heat released during analytical pyrolysis of the model biomass and distribution of carbon in the resultant biochar are significantly influenced by scaling effects, drawing attention to the need for a more detailed scaling investigation of biomass pyrolysis.
PROMECE - Research Results Transfer -  Report of communication actions of Trends and R & D
Creators: name: ITI
Publisher: name: Zenodo
Year: 2016
Subjects: promece2016
dissemination
Research Results Transfer

description: Instituto Tecnológico de Informática has a non-economic Activities Plan (PROMECE) whose general objective is to strengthen the research lines in which the Institute works, within the scope of Information and Communication Technologies (ICT).

Through this activities plan a work is carried out to transfer the results obtained in the execution of R+D+I projects within these lines or areas of action. The transfer actions are aimed at companies and the industrial sector and society as a whole.

This document describes the activities performed and the achieved objectives during 2016
description: PROMECE 2016. Project funded by the Valencian Institute of Business Competitiveness (IVACE) and the European Union through the European Regional Development Fund (ERDF), within the public grant program adressed to Technological Institutes of IVACE network. File number: IMAMCN/2016/1
Sharpening of graded diamond grinding wheels
Creators: name: Denkena, Berend
name: Bergmann, Benjamin
name: Raffalt, Daniel
Publisher: name: [Cham] : Springer International Publishing
Year: 2023
Subjects: subject: Deep grinding
subject: Graded grinding tools
subject: Grinding wheel topography
subject: Hybrid-bond grinding wheels
subject: Sharpening
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: Grinding the flutes of cemented carbide end mill cutters results in high and uneven radial wear of the grinding wheel. This is a consequence of the varying geometrical contact conditions over the grinding wheel width. Decreased manufacturing accuracy regarding the tool target geometry is the consequence. To compensate for this, the dressing intervals must be shortened. High non-productive times and an additionally reduction of the grinding layer results from this. The higher non-productive times reduce the productivity of the grinding process and, in conjunction with the shorter lifetime of the grinding tool, thus increase the costs per work piece. It has already been shown that load-adapted grinding wheels can reduce uneven radial wear up to 50%. The adaptation of the wear behaviour to non-uniform engagement conditions causes non-uniform radial wear to occur again under uniform engagement conditions. Uniform engagement conditions occur during grinding wheel sharpening. Therefore, the present study investigates the influence of sharpening on the grinding tool topography. For this purpose, sharpening tests are carried out on four differently graded grinding wheels. For comparability, the tests are also carried out on two non-graded grinding wheels. In the present work, the surface parameters are evaluated with regard to their suitability for analysing the sharpening condition of graded grinding wheels. The grain protrusion derived from this is subsequently used for evaluation. For this, a dependency on the grain concentration is proven and the grain protrusions are shown over the grinding wheel widths. From this, sharpening parameters are determined that enable reproducible sharpening of graded grinding wheels.
Angular momentum transfer torques in spin valves with perpendicular magnetization
Creators: name: Jia, Xingtao
name: Li, Ying
name: Xia, Ke
name: Bauer, Gerrit E. W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spin valves incorporating perpendicularly magnetized materials are promising structures for memory elements and high-frequency generators. We report the angular dependence of the spin-transfer torque in spin valves with perpendicular equilibrium magnetization computed by first-principles circuit theory and compare results with experiments by W.H. Rippard c.s. [Phys. Rev. B 81, 014426 (2010)] on the CoFe|Cu|CoNi system. Furthermore, we predict a non-monotonous ("wavy") spin-transfer torque when the Cu spacer is replaced by a Ru layer.
description: 6 pages, 4 figures
Identification of novel prognostic biomarkers in diffuse large B cell lymphoma in the rituximab era
Creators: name: Johnson, Nathalie
Publisher: name: University of British Columbia
Year: 2011

description: Diffuse large B cell lymphoma (DLBCL) is the most common form of lymphoma and is characterized by marked clinical and genetic heterogeneity. Approximately 60% of patients with DLBCL are cured with multi-agent chemotherapy consisting of rituximab, cyclophosphamide, hydroxyldaunomycin, oncovin and prednisone (R-CHOP). R-CHOP represents the current standard of care throughout the world for the treatment of DLBCL. The international prognostic index (IPI) is a clinical tool that can help risk-stratify patients at the time of diagnosis but it fails to identify 50% of patients who will relapse and provides no insights into the biology of the disease. The aim of this work was to identify prognostic markers that would complement the IPI, would reflect the underlying tumour biology and could be easily translated into the clinical setting. We used flow cytometry (FCM) to study the protein expression of the CD20 antigen, the target of rituximab on lymphoma cells and performed fluorescence in situ hybridization on DLBCL biopsies to identify the presence of genomic rearrangements in the BCL2 and MYC oncogenes. We also used DNA sequencing to determine if somatic mutations involving the rituximab binding epitope of CD20 had any impact upon patients failing therapy. We determined that recurrent mutations of exon 5 of CD20 do not explain rituximab resistance in clinical cases of DLBCL. In contrast, we could demonstrate that both a reduced expression of CD20 by FCM and the presence of concurrent de-regulation of MYC and BCL2 expression are independently associated with an inferior survival in DLBCL patients treated with R-CHOP. Importantly, both maintain their prognostic significance in multivariate analysis, independent of the IPI. Furthermore, these biomarkers reveal important novel insights into DLBCL biology and provide rational targets for therapy. As such they should be investigated and validated prospectively for future use in the clinical setting.
On the asymptotic rate of convergence of Stochastic Newton algorithms and their Weighted Averaged versions
Creators: name: Boyer, Claire
name: Godichon-Baggioni, Antoine
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: The majority of machine learning methods can be regarded as the minimization of an unavailable risk function. To optimize the latter, given samples provided in a streaming fashion, we define a general stochastic Newton algorithm and its weighted average version. In several use cases, both implementations will be shown not to require the inversion of a Hessian estimate at each iteration, but a direct update of the estimate of the inverse Hessian instead will be favored. This generalizes a trick introduced in [2] for the specific case of logistic regression, by directly updating the estimate of the inverse Hessian. Under mild assumptions such as local strong convexity at the optimum, we establish almost sure convergences and rates of convergence of the algorithms, as well as central limit theorems for the constructed parameter estimates. The unified framework considered in this paper covers the case of linear, logistic or softmax regressions to name a few. Numerical experiments on simulated data give the empirical evidence of the pertinence of the proposed methods, which outperform popular competitors particularly in case of bad initializa-tions.
description: Computational Optimization and Applications, 2022
Differential–algebraic systems with dissipative Hamiltonian structure
Creators: name: Mehrmann, Volker
name: Van Der Schaft, Arjan
Publisher: name: Springer Science and Business Media LLC
Year: 2023
Subjects: subject: 500 Naturwissenschaften und Mathematik::510 Mathematik::510 Mathematik
subject: Port-Hamiltonian system
subject: dissipative Hamiltonian system
subject: differential–algebraic equation
subject: Lagrange structure
subject: Dirac structure
subject: Matrix pencil

description: Different representations of linear dissipative Hamiltonian and port-Hamiltonian differential–algebraic equations (DAE) systems are presented and compared. Using global geometric and algebraic points of view, translations between different representations are presented. Characterizations are also derived when a general DAE system can be transformed into one of these structured representations. Approaches for computing the structural information and the described transformations are derived that can be directly implemented as numerical methods. The results are demonstrated with a large number of examples.
Effective anisotropy of periodic acoustic and elastic composites
Creators: name: Laude, Vincent
name: Martinez, Julio Andres Iglesias
name: Wang, Yan-Feng
name: Kadic, Muamer
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The propagation of acoustic or elastic waves in artificial crystals, including the case of phononic and sonic crystals, is inherently anisotropic. As is known from the theory of periodic composites, anisotropy is directly dictated by the space group of the unit cell of the crystal and the rank of the elastic tensor. Here, we examine effective velocities in the long wavelength limit of periodic acoustic and elastic composites as a function of the direction of propagation. We derive explicit and efficient formulas for estimating the effective velocity surfaces, based on second-order perturbation theory, generalizing the Christofell equation for elastic waves in solids. We identify strongly anisotropic sonic crystals for scalar acoustic waves and strongly anisotropic phononic crystals for vector elastic waves. Furthermore, we observe that under specific conditions, quasi-longitudinal waves can be made much slower than shear waves propagating in the same direction.
Fast tree-based algorithms for DBSCAN for low-dimensional data on GPUs
Creators: name: Prokopenko, Andrey
name: Lebrun-Grandie, Damien
name: Arndt, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: DBSCAN is a well-known density-based clustering algorithm to discover arbitrary shape clusters. While conceptually simple in serial, the algorithm is challenging to efficiently parallelize on manycore GPU architectures. Common pitfalls, such as asynchronous range query calls, result in high thread execution divergence in many implementations. In this paper, we propose a new framework for GPU-accelerated DBSCAN, and describe two tree-based algorithms within that framework. Both algorithms fuse the search for neighbors with updating cluster information, but differ in their treatment of dense regions of the data. We show that the time taken to compute clusters is at most twice that of determination of the neighbors. We compare the proposed algorithms with existing CPU and GPU implementations, and demonstrate their competitiveness and performance using a fast traversal structure (bounding volume hierarchy) for low dimensional data. We also show that the memory usage can be reduced by processing object neighbors dynamically without storing them.
description: Accepted to ICPP 2023
Interaction Effects and Viscous Magneto-Transport in a Strongly Correlated 2D Hole System
Creators: name: Kumar, Arvind Shankar
name: Liu, Chieh-Wen
name: Liu, Shuhao
name: Pfeiffer, Loren N.
name: West, Kenneth W.
name: Levchenko, Alex
name: Gao, Xuan P. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Fermi liquid theory has been a foundation in understanding the electronic properties of materials. For weakly interacting two-dimensional (2D) electron or hole systems, electron-electron interactions are known to introduce quantum corrections to the Drude conductivity in the FL theory, giving rise to temperature dependent conductivity and magneto-resistance. Here we study the magneto-transport in a strongly interacting 2D hole system over a broad range of temperatures ($T$ = 0.09 to $>$1K) and densities $p=1.98-0.99\times10^{10}$ cm$^{-2}$ where the ratio between Coulomb energy and Fermi energy $r_s$ = 20 - 30. We show that while the system exhibits a negative parabolic magneto-resistance at low temperatures ($\lesssim$ 0.4K) characteristic of an interacting FL, the FL interaction corrections represent an insignificant fraction of the total conductivity. Surprisingly, a positive magneto-resistance emerges at high temperatures and grows with increasing temperature even in the regime $T \sim E_F$, close to the Fermi temperature. This unusual positive magneto-resistance at high temperatures is attributed to the collective viscous transport of 2D hole fluid in the hydrodynamic regime where holes scatter frequently with each other. These findings highlight the collective transport in a strongly interacting 2D system in the $r_s\gg 1$ regime and the hydrodynamic transport induced magneto-resistance opens up possibilities to new routes of magneto-resistance at high temperatures.
description: 9 pages, 4 figures
CDMA: A Practical Cross-Device Federated Learning Algorithm for General Minimax Problems
Creators: name: Xie, Jiahao
name: Zhang, Chao
name: Shen, Zebang
name: Liu, Weijie
name: Qian, Hui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Minimax problems arise in a wide range of important applications including robust adversarial learning and Generative Adversarial Network (GAN) training. Recently, algorithms for minimax problems in the Federated Learning (FL) paradigm have received considerable interest. Existing federated algorithms for general minimax problems require the full aggregation (i.e., aggregation of local model information from all clients) in each training round. Thus, they are inapplicable to an important setting of FL known as the cross-device setting, which involves numerous unreliable mobile/IoT devices. In this paper, we develop the first practical algorithm named CDMA for general minimax problems in the cross-device FL setting. CDMA is based on a Start-Immediately-With-Enough-Responses mechanism, in which the server first signals a subset of clients to perform local computation and then starts to aggregate the local results reported by clients once it receives responses from enough clients in each round. With this mechanism, CDMA is resilient to the low client availability. In addition, CDMA is incorporated with a lightweight global correction in the local update steps of clients, which mitigates the impact of slow network connections. We establish theoretical guarantees of CDMA under different choices of hyperparameters and conduct experiments on AUC maximization, robust adversarial network training, and GAN training tasks. Theoretical and experimental results demonstrate the efficiency of CDMA.
description: Extended version of paper https://doi.org/10.1609/aaai.v37i9.26246 which appeared in AAAI 2023
Gelechia senticetella
Creators: name: Wieser, Christian
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Gelechiidae
Gelechia
Gelechia senticetella

description: Gelechia senticetella (Staudinger, 1859)
Die Art passt bestens in die städtische Gartenlandschaft mit der Futterpflanze Thuje und diversen Zierwacholderarten. Nachgewiesen wurde die Art erstmals für Kärnten im Rahmen des bereits oben angeführten Kooperationsprojektes in Villach, Spitzeckweg, am 15.6.2017 (Leg. C. Holzschuh, det. Ch. Wieser).
Barcodekenndaten in BOLD: KLM Lep 08802/LEAST1467-18
description: Published as part of Wieser, Christian, 2017, Weitere Erstfunde und bemerkenswerte Schmetterlingsnachweise aus Kärnten (Insecta: Lepidoptera), pp. 285-291 in Rudolfinum – Jahrbuch des Landesmuseums für Kärnten 2017 on page 289, DOI: 10.5281/zenodo.5725317