cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Complex shape evolution of electromigration-driven single-layer islands
Creators: name: Kuhn, Philipp
name: Krug, Joachim
name: Hausser, Frank
name: Voigt, Axel
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The shape evolution of two-dimensional islands through periphery diffusion biased by an electromigration force is studied numerically using a continuum approach. We show that the introduction of crystal anisotropy in the mobility of edge atoms induces a rich variety of migration modes, which include oscillatory and irregular behavior. A phase diagram in the plane of anisotropy strength and island size is constructed. The oscillatory motion can be understood in terms of stable facets which develop on one side of the island and which the island then slides past. The facet orientations are determined analytically.
description: 4 pages, 5 figures
Apparent Superluminality of Lensed Gravitational Waves
Creators: name: Ezquiaga, Jose María
name: Hu, Wayne
name: Lagos, Macarena
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider gravitational wave (GW) sources with an associated electromagnetic (EM) counterpart, and analyze the time delay between both signals in the presence of lensing. If GWs have wavelengths comparable to the Schwarzschild radius of astrophysical lenses, they must be treated with wave optics, whereas EM waves are typically well within the approximation of geometric optics. With concrete examples, we confirm that the GW signal never arrives before its EM counterpart, if both are emitted at the same time. However, during the inspiral of a binary, peaks of the GW waveform can arrive before their EM counterpart. We stress this is only an apparent superluminality since the GW waveform is both distorted and further delayed with respect to light. In any case, measuring the multi-messenger time delay and correctly interpreting it has important implications for unveiling the distribution of lenses, testing the nature of gravity, and probing the cosmological expansion history.
description: 8 pages, 5 figures. Accepted PRD. Updated Eq. (1)-(3) to comoving distance
الإستهلاك والفائض التسويقى من الأرز والذرة فى ظل التحرر الاقتصادى فى مصر
Creators: name: Soliman, Ibrahim
name: Gaber, Mohamed
name: Soliman, Ibrahim
name: Gaber, Mohamed
Publisher: name: Unknown
Year: 1998
Subjects: subject: Consumer/Household Economics
subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Public Economics
subject: Consumption and marketable surplus of rice and maize under economic liberalization in Egypt
subject: Egypt
subject: Rice
subject: Maize
subject: Marketing

description: Zagazig Journal of Agricultural Research, Volume 25, No 1, January 1998. Published by Faculty of Agriculture, Zagazig University, Zagazig, Egypt
العلاقات الانتاجية لنظام الاستزراع السمكى المحمل على حقول الأرز فى مصر
Creators: name: Soliman, Ibrahim
name: Gaber, Mohamed
name: Soliman, Ibrahim
name: Gaber, Mohamed
Publisher: name: Unknown
Year: 1991
Subjects: subject: Crop Production/Industries
subject: Production Economics
subject: Public Economics
subject: Input-output Relations for fish inter-plantation with rice fields in Egypt
subject: Egypt
subject: rice
subject: crops

description: Proceedings of the 16th international conference for statistics, computer science, social and demographic research, Cairo, Egypt, 2-7 March 1991, volume 3
Chaotic properties for billiards in circular polygons
Creators: name: Clarke, Andrew
name: Ramírez-Ros, Rafael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37C83 (Primary), 37B10 (Secondary)

description: We study billiards in domains enclosed by circular polygons. These are closed $C^1$ strictly convex curves formed by finitely many circular arcs. We prove the existence of a set in phase space, corresponding to generic sliding trajectories close enough to the boundary of the domain, in which the return billiard dynamics is semiconjugate to a transitive subshift on infinitely many symbols that contains the full $N$-shift as a topological factor for any $N \in \mathbb{N}$, so it has infinite topological entropy. We prove the existence of uncountably many asymptotic generic sliding trajectories approaching the boundary with optimal uniform linear speed, give an explicit exponentially big (in $q$) lower bound on the number of $q$-periodic trajectories as $q \to \infty$, and present an unusual property of the length spectrum. Our proofs are entirely analytical.
description: 42 pages, 7 figures
الكفاءة الاقتصادية لتشغيل الجرارات الزراعية
Creators: name: Soliman, Ibrahim
name: Monir Migahed, Maesa
name: Soliman, Ibrahim
name: Monir Migahed, Maesa
Publisher: name: Unknown
Year: 1994
Subjects: subject: Public Economics
subject: Economic Efficiency for agricultural Tractor operation
subject: tractor
subject: agricultural Tractor

description: Proceedings Fifth Conference of Agricultural Development Research. 20-22 December 1994. Annals Agricultural science Journal issued by the Faculty of Agriculture, Ain Shams University, Cairo, Egypt
THE ROLE OF SOCIOLINGUISTIC COMPETENCE IN THE DEVELOPMENT OF COMMUNICATIVE COMPETENCE OF A1 LEVEL STUDENTS IN ENGLISH LESSONS
Creators: name: Rakhmatullayeva, Maktubakhon
Publisher: name: Zenodo
Year: 2024

description: This article examines the role of sociolinguistic competence in developing the communicative competence of A1 level students in English lessons. Important aspects of developing sociolinguistic competence are analyzed and various methods are proposed.
تحليل التحركات الزمنية السعرية : دراسة حالة للمنتجات الحيوانية فى السوق المصرى
Creators: name: Soliman, Ibrahim
name: EzzEldien Mohamed, Shaikhoun
name: Soliman, Ibrahim
name: EzzEldien Mohamed, Shaikhoun
Publisher: name: Unknown
Year: 1995
Subjects: subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Productivity Analysis
subject: Public Economics
subject: Time series analysis for agricultural prices: A case study of animal products
subject: animal products
subject: Time series analysis for agricultural prices

description: Egyptian Journal of Agricultural Economics, Volume 5, No 2, September 1995. Published by Egyptian Association of Agricultural Economics, Egypt
ARACNE: An Algorithm for the Reconstruction of Gene Regulatory Networks in a Mammalian Cellular Context
Creators: name: Margolin, Adam A.
name: Nemenman, Ilya
name: Basso, Katia
name: Klein, Ulf
name: Wiggins, Chris
name: Stolovitzky, Gustavo
name: Favera, Riccardo Dalla
name: Califano, Andrea
Publisher: name: arXiv
Year: 2004
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Genomics (q-bio.GN)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Background: Elucidating gene regulatory networks is crucial for understanding normal cell physiology and complex pathologic phenotypes. Existing computational methods for the genome-wide ``reverse engineering'' of such networks have been successful only for lower eukaryotes with simple genomes. Here we present ARACNE, a novel algorithm, using microarray expression profiles, specifically designed to scale up to the complexity of regulatory networks in mammalian cells, yet general enough to address a wider range of network deconvolution problems. This method uses an information theoretic approach to eliminate the majority of indirect interactions inferred by co-expression methods. Results: We prove that ARACNE reconstructs the network exactly (asymptotically) if the effect of loops in the network topology is negligible, and we show that the algorithm works well in practice, even in the presence of numerous loops and complex topologies. We assess ARACNE's ability to reconstruct transcriptional regulatory networks using both a realistic synthetic dataset and a microarray dataset from human B cells. On synthetic datasets ARACNE achieves very low error rates and outperforms established methods, such as Relevance Networks and Bayesian Networks. Application to the deconvolution of genetic networks in human B cells demonstrates ARACNE's ability to infer validated transcriptional targets of the c MYC proto-oncogene. We also study the effects of mis estimation of mutual information on network reconstruction, and show that algorithms based on mutual information ranking are more resilient to estimation errors.
description: accepted version; minor revisions following referee suggestions; 28 pages, 9 figures; detailed version of q-bio.MN/0410036
تقدير نماذج المحاكاة للعرض والطلب لأسواق المنتجات الحيوانية الغذائية
Creators: name: Soliman, Ibrahim
name: Soliman, Ibrahim
Publisher: name: Unknown
Year: 1995
Subjects: subject: Demand and Price Analysis
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Public Economics
subject: Estimation of Demand and Supply Models for Animal food Products Markets
subject: Animal food Products Markets
subject: foods
subject: marketing
subject: animal

description: Fourth Conference of Agricultural Economists "internal trade of agricultural commodities," October 25-26, 1995. The Egyptian Association of Agricultural Economics
Long-Lived Eccentric Modes in Circumbinary Disks
Creators: name: Muñoz, Diego J.
name: Lithwick, Yoram
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Hydrodynamical simulations show that circumbinary disks become eccentric, even when the binary is circular. Here we demonstrate that, in steady state, the disk's eccentricity behaves as a long-lived free mode trapped by turning points that naturally arise from a continuously truncated density profile. Consequently, both the disk's precession rate and eccentricity profile may be calculated via the simple linear theory for perturbed pressure-supported disks. By formulating and solving the linear theory we find that (i) surprisingly, the precession rate is roughly determined by the binary's quadrupole, even when the quadrupole is very weak relative to pressure; (ii) the eccentricity profile is largest near the inner edge of the disk, and falls exponentially outwards; and (iii) the results from linear theory indeed agree with what is found in simulations. Understanding the development of eccentric modes in circumbinary disks is a crucial first step for understanding the long term (secular) exchange of eccentricity, angular momentum and mass between the binary and the gas. Potential applications include the search for a characteristic kinematic signature in disks around candidate binaries and precession-induced modulation of accretion over long timescales.
description: 11 pages, 11 figures (accepted to ApJ)
title: Sociocultural understandings of technology-mediated educational practices: improvable objects and meaning-making trajectories in the ICT-literate classroom
Creators: name: Twiner, Alison
Publisher: name: The Open University
Year: 2011

description: Informed by sociocultural theory, this thesis addresses the gap between the view that teaching-and-learning should be an extended, integrated experience, and the limited research available on how classroom technologies can support this (Glover, et al., 2007). The research explores a new programme using technologies (including interactive whiteboards: IWBs) together with dance/movement and more traditional classroom activities to support teaching-and-learning. Data are presented from eight consecutive history lessons on the Great Fire of London with a Year 2 class (6-7 years), together with four interviews, two Video-Stimulated Reflective Dialogue sessions and a focus group. Findings are based on sociocultural discourse analysis (Mercer, 2004), multimodal analysis (Jewitt, 2009; Kress & van Leeuwen, 2001) and thematic analysis (Braun & Clarke, 2006) of these data. With implications for both theory and practice, analysis shows how the IWB was used in innovative ways to offer structure and flexibility across lessons. Evidence is also provided of how exploring the topic through dance/movement, images and other activities could support pupils in building conceptual understanding. This then served as a context to develop verbally-expressed understanding. Analysis indicates, however, that confusion could arise in the different ways concepts were referred to through this integrated approach. Based on these findings, Wells’ (1999) concept of the ‘improvable object’ is extended to illustrate how flexible use of IWB slides and talk around them, and how exploring and re-versioning concepts across activities, brings new dimensions to the knowledge-construction process. Furthermore, the importance of addressing meaning making as an interactional achievement became evident, through extension of Baldry and Thibault’s (2006) ‘meaning-making trajectory’. Analysing teacher and pupil perspectives offers valuable insights, regarding how the teacher used and improvised from his lesson plan to acknowledge pupils’ interpretations, and support ongoing meaning making. These contributions represent important understandings of knowledge construction in contemporary, technology-mediated classrooms.
title: Hotel Strozzi
Creators: name: Bauerfeld, Alina
Publisher: name: TU Wien
Year: 2016
Subjects: subject: Stadthotel
subject: City Hotel

description: Wien wächst stetig und wird schon 2029 die Zwei-Millionen-Grenze überschreiten. Besonders stark punkten kann die geschichtsträchtige Stadt im hochqualitativen aber jungen Hoteltourismus abseits großer Hotelketten. Im 8.Wiener Gemeindebezirk, in der Strozzigasse 39, soll daher anstatt eines Abbruchhauses einneues Stadthotel entstehen. Der dahinter gelegene Park des Palais Strozzi wird für die Öffentlichkeit zugängig gemacht und bietet für die Bewohner des dicht bebauten Bezirks einen neuen Mehrwert mit direktem Zugang durch das Grundstück der Hausnummer 39. Das Gebäude fügt sich in der kleinen Baulücke gut in das Stadtbild ein und bietet auch durch die Gestaltung einer attraktiven Erdgeschosszone, dem Durchgang zum Strozzipark und einem Bistro Aufwertung. Die Grundrisse der Zimmer sind sehr unterschiedlich gestaltet; von minimalistisch und platzsparend bis hin zu einer großzügigen Suite im DG.
description: Vienna is a booming and constantly growing city. Every year more and more touristst visit the historic city; Due to that fact modern city accommodation gets very important. In 8th district a run down and deserted building at Strozzigasse 39 will make room for a modern city hotel. The park of the Palais Strozzi - situated directly behind the project - will be opened to the public and will hereby enhance the live quality of the local residents. The park will be made accessible directly via a passage trough house 39, the newly established building will feel included in the overall appearance of the townscape yet give it a modern twist and add value to the area with its attractive ground level. The layouts extend from minimalistic modern rooms to a lavish suite on the topfloor.
Sustainability assessment in the clean development mechanism (CDM) : current state and opportunities for improvement
Creators: name: Ghatala, Frederick Jamal
Publisher: name: University of British Columbia
Year: 2010

description: The Kyoto Protocol, a treaty that sets legally binding emission reduction amounts for a group of industrialized countries, was signed in 1997 and came into force in 2005. To provide flexibility in meeting their reduction requirements, industrialized nations are allowed the use of three flexible mechanisms, one of which is the Clean Development Mechanism (CDM). The CDM is a system that allows for Annex 1 nations to use emission reductions occurring in developing countries for their own compliance with the Kyoto emission reduction requirements. During subsequent Kyoto negotiations (the Marrakech Accords, November 2001), it was established that CDM projects must contribute to sustainable development in the countries in which the projects occur. It was decided that the criteria for sustainable development contributions, as well as how these contributions are to be measured, would be the prerogative of the developing countries in which the project occurs. The perceived lack of sustainable development contributions from CDM projects to host countries has become a source of major criticism of the mechanism (Peterson 2005). In this thesis it is proposed that there is a link between this perceived lack of sustainability benefits and the failure of the CDM governing board to institute required sustainability assessments of projects. The focus of this thesis is to evaluate how sustainability concerns have been taken into account in the newly created CDM. An evaluation of a representative set of CDM projects to ascertain the types of sustainability assessment methodologies utilized revealed that there is a gap between the sustainable development benefits envisioned from the CDM and the implementation of any evaluation method for verifying those contributions on the ground. The available CDM-specific methods to assess sustainability are evaluated and compared against an assessment criterion that takes into account a set of CDM-related host country equity concerns proposed in this thesis. Based on this analysis, it is recommended that the role of the CDM Executive Board be expanded to include a focus on sustainability concerns, including a mandated sustainability assessment, thereby ensuring measurable contributions to sustainable development and increased transparency in the CDM.
EKONOMICZNA EFEKTYWNOŚĆ REGULACJI ZACHWASZCZENIA NA PLANTACJACH ZIEMNIAKÓW
Creators: name: Zarzecka, Krystyna
name: Gugała, Marek
name: Baranowska, Alicja
name: Zarzecka, Krystyna
name: Gugała, Marek
name: Baranowska, Alicja
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: potatoes
subject: yields
subject: weed control methods
subject: efficiency

description: This paper presents an assessment of economic efficiency of different methods of reducing weed infestation in potato cultivation. Experimental objects included five weed control methods: mechanical as well as four objects of mechanical-chemical treatments with the use of herbicides and their mixtures - Command 480 EC, Command 480 EC + Afalon Dyspersyjny 450 SC, Stomp 400 SC, Stomp 400 SC + Afalon Dyspersyjny450 SC. On the mechanical-chemical treated objects, as compared with mechanical weeding, the obtained increase of market yield of tubers was 70,3-182,7 dt/ha. Orientation indexes of profitability (E1 and E2 ) indicate that chemical protection of the potato was profitable.
Lower Transport Bounds for One-Dimensional Continuum Schrödinger Operators
Creators: name: Damanik, David
name: Lenz, Daniel
name: Stolz, Günter
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We prove quantum dynamical lower bounds for one-dimensional continuum Schrödinger operators that possess critical energies for which there is slow growth of transfer matrix norms and a large class of compactly supported initial states. This general result is applied to a number of models, including the Bernoulli-Anderson model with a constant single-site potential.
description: 22 pages
Conservation law of harmonic mappings in supercritical dimensions
Creators: name: Guo, Chang-Yu
name: Xiang, Chang-Lin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58E20, 35J60

description: In this short note, we provide a partial extension of Rivière's convervation law in higher dimensions under certain Lorentz integrability condition for the connection matrix. As an application, we obtain a conservation law for weakly harmonic mappings around regular points in supercritical dimensions.
description: 6 pages
M2GRL: A Multi-task Multi-view Graph Representation Learning Framework for Web-scale Recommender Systems
Creators: name: Wang, Menghan
name: Lin, Yujie
name: Lin, Guli
name: Yang, Keping
name: Wu, Xiao-ming
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Combining graph representation learning with multi-view data (side information) for recommendation is a trend in industry. Most existing methods can be categorized as \emph{multi-view representation fusion}; they first build one graph and then integrate multi-view data into a single compact representation for each node in the graph. However, these methods are raising concerns in both engineering and algorithm aspects: 1) multi-view data are abundant and informative in industry and may exceed the capacity of one single vector, and 2) inductive bias may be introduced as multi-view data are often from different distributions. In this paper, we use a \emph{multi-view representation alignment} approach to address this issue. Particularly, we propose a multi-task multi-view graph representation learning framework (M2GRL) to learn node representations from multi-view graphs for web-scale recommender systems. M2GRL constructs one graph for each single-view data, learns multiple separate representations from multiple graphs, and performs alignment to model cross-view relations. M2GRL chooses a multi-task learning paradigm to learn intra-view representations and cross-view relations jointly. Besides, M2GRL applies homoscedastic uncertainty to adaptively tune the loss weights of tasks during training. We deploy M2GRL at Taobao and train it on 57 billion examples. According to offline metrics and online A/B tests, M2GRL significantly outperforms other state-of-the-art algorithms. Further exploration on diversity recommendation in Taobao shows the effectiveness of utilizing multiple representations produced by \method{}, which we argue is a promising direction for various industrial recommendation tasks of different focus.
description: Accepted by KDD 2020 ads track as an oral paper. Code address:https://github.com/99731/M2GRL
Sharp Morrey regularity for an even order elliptic system
Creators: name: Guo, Chang-Yu
name: Qi, Wen-Juan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this short note, we establish a sharp Morrey regularity theory for an even order elliptic system of Rivière type: \begin{equation*}
 Δ^{m}u=\sum_{l=0}^{m-1}Δ^{l}\left\langle V_{l},du\right\rangle +\sum_{l=0}^{m-2}Δ^{l}δ\left(w_{l}du\right)+f\qquad \text{in} B^{2m} \end{equation*} under minimal regularity assumptions on the coefficients functions V^l, w^l and that f belongs to certain Morrey space. This can be regarded as a further extension of the recent L^p-regularity theory obtained by Guo-Xiang-Zheng [15], and generalizes [7, 27] for second and fourth order elliptic systems.
description: 12 pages
(BPS) Fayet-Iliopoulos Terms in 5D Orbifold SUGRA
Creators: name: Correia, Filipe Paccetti
name: Schmidt, Michael G.
name: Tavartkiladze, Zurab
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss Fayet-Iliopoulos terms in the context of five-dimensional supergravity compactified on an orbifold. For this purpose we use our superfield formulation of the off-shell 5D SUGRA. In the case of tuned FI terms, contrary to other claims, we find BPS solutions which ensure that N=1 supersymmetry is unbroken also in warped geometries. As in the rigid case, the FI terms induce odd masses for charged hypermultiplets, leading to the (de)localisation of the KK wave-functions near the fix-point branes. In the case of ungauged U(1)_R symmetry, we present also supersymmetric warped solutions in the presence of non-trivial profiles of charged hyperscalars.
description: LaTeX, 11 pages, 2 figures, extended discussion after (25) and (49), version published in PLB
title: The Politics of Health: Community Engagement in South African HIV Vaccine Trial Sites
Creators: name: Upton, Mary Ellen
Publisher: name: The Open University
Year: 2011

description: This research responds to limited evidence of the social and political aspects of health biotechnologies. Reaching beyond the literature on trial participation, it explores the extent to which members of Community Advisory Boards (CABs) play meaningful political roles in South African vaccine clinical trial sites. The thesis confirms the need to understand the socio-economic, political and historical contexts in which local health initiatives are situated, by identifying the combined impact of negative social norms and the politics of HIV/AIDS which limit access to health. Interviews, focus groups and observations gathered in trial sites and documentary data reveal complex interrelationships between global and national health governance and local agency. Concepts from theories of social justice, governance, power and citizenship develop the literature on health activism beyond the descriptive by providing a theoretical framework to understand that complexity. Empirical data reveal the complexities of the lives of people who are at the receiving end of global health policy and the realities of the political channels open to them; shedding light on previously unexplored factors enhancing or inhibiting community participation in health governance. Information on HIV/AIDS and vaccine science increases opportunities for negotiating rather than reacting to decisions over health strategies. Networking with wider health and other community-based and civil society organisations develops that agency. However,the ideals of community engagement are challenged by: the political dynamics of CABS which frustrate collective action; intermittent contact between trial site researchers and CABs; the accountabilities of researchers to donors and communities; and limited representation of those heterogeneous communities. The impact of multiple forms of stigma on marginalised and vulnerable women, Men Who have Sex with Men (MSM) and migrants confirms the value of looking at health inequalities in terms of variable health needs in context rather than seeking equal distribution of health resources.
Here Be Livestreams: Trade-offs in Creating Temporal Maps of Reddit
Creators: name: Partridge, Virginia
name: Mangat, Jasmine
name: Curran, Rebecca
name: McGrady, Ryan
name: Zuckerman, Ethan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: We present a method for mapping Reddit communities that accounts for temporal shifts, using quantitative and qualitative analyses of clustering techniques to produce high-quality, stable, and meaningful maps for researchers, journalists and casual Reddit users. Building on previous work using community embeddings, we find that only a month of Reddit comments suffices to create snapshot embeddings that maintain quality while supporting insight into changes in Reddit communities over time. Comparing different clusterings of community embeddings with quantitative measures of quality and temporal stability, we describe properties of the models and what they tell us about the underlying Reddit data. Moreover, qualitative analysis of the resulting clusters illuminate which properties of clusterings are useful for analysis of Reddit communities. Although clusterings of subreddits have been used in many earlier works, we believe this is the first study to qualitatively analyze how these clusterings are perceived by social media researchers at a Reddit-wide scale.
 Finally, we demonstrate how the temporal snapshots might be used in exploratory study. We are able to identify particularly stable communities during 2021-2022, such as the Reddit Public Access Network, as well as emerging communities, like one focused on NFT trading. This work informed the development of a webtool for exploring Reddit now available to the public at RedditMap.social.
description: 10 pages, 8 figures
Sticky Prices, Competition and the Phillips Curve
Creators: name: Mikosch, Heiner
Publisher: name: ETH Zurich
Year: 2012
Subjects: Micro data
BUSINESS CYCLE
Phillips curve
WIRTSCHAFTLICHER WETTBEWERB
PRICE THEORIES
MAKROÖKONOMISCHE MODELLE (OPERATIONS RESEARCH)
ECONOMIC COMPETITION
INFLATION
Real rigidity
PREISTHEORIEN
Price stickiness
MACROECONOMIC MODELS (OPERATIONS RESEARCH)
KONJUNKTURZYKLUS
info:eu-repo/classification/ddc/330
Economics

description: KOF Working Papers, 294
LOKALNE STRATEGIE INNOWACJI JAKO NARZĘDZIE ZARZĄDZANIA ROZWOJEM POWIATÓW STANOWIĄCYCH OBSZARY POTENCJALNEGO WZROSTU LUBELSZCZYZNY
Creators: name: Adamowicz, Mieczysław
name: Adamowicz, Mieczysław
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: local development
subject: developing areas
subject: innovation strategies
subject: innovation systems

description: The aim of the paper is an assessment of the competetive and innovative potential and an outline of local innovation startegies of three districts in Lublin province recognised as the growth potential areas. The areas of łęczyński, świdnicki and puławski districts are favourably located, because are adiacent to Lublin metropolitan area. The comparative research refers to Local Innovation Strategies (LSI) recognised as an important tool of management in local systems. Results of research show that the innovativeness and competitiveness of lokal systems, aside location, material resoures and presence of key industries, depend on creation and maintaining different forms of cooperation in which an important role play: teritorial selfgeverments, research institutions and non government organisations empovered in local social and cultural environment.
title: Sustainable mobility in rural areas based on autonomous vehicles and mobility on-demand : a pre-feasibility study for Lower Austria
Creators: name: Beitz, Laura
Publisher: name: TU Wien
Year: 2016
Subjects: subject: autonomous vehicles
subject: mobility on-demand
subject: car sharing
subject: sustainability
subject: sustainable mobility
subject: climate change
subject: mitigation

description: In the past century, private automobiles have shaped personal mobility by enabling fast and convenient point-to-point travel. However, this development is having a serious effect on the sustainable nature of our transport system. To transform personal transportation to a sustainable mobility system, two fields of research are currently receiving considerable attention: autonomous vehicles and mobility on-demand. So far, the focus of this research has been on implementing autonomous vehicles and mobility on-demand in urban environments, with far too little attention paid to rural areas. Thus, the purpose of this thesis is to evaluate the potential of autonomous vehicles applied in a mobility on-demand concept in Lower Austria, in order to provide sustainable mobility in rural areas. In the course of this, a new mobility model derived from the two concepts is developed. The model is based on a literature review as well as a quantitative analysis of secondary data. The findings confirm the hypothesis that an autonomous mobility on-demand model can increase mobility and make personal transportation more sustainable in Lower Austria. One of the more significant findings to emerge from this study is that autonomous vehicles can eliminate the limitations of current mobility on-demand models and allow them to expand to rural areas. It was also shown that the developed model would have a substantial impact on Lower Austria, enable the use of transport resources more efficiently and ultimately change the way we perceive automobile travel. Taken together, these results suggest that further research is necessary to evaluate the feasibility of the developed model. This research should be undertaken now to ensure that Lower Austria is ready when autonomous vehicles hit the roads. Furthermore, the study has gone some way towards enhancing our understanding of autonomous vehicles and their ability to improve personal transportation in rural areas.
Statistical fluctuations of the parametric derivative of the transmission and reflection coefficients in absorbing chaotic cavities
Creators: name: Martinez-Mares, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Motivated by recent theoretical and experimental works, we study the statistical fluctuations of the parametric derivative of the transmission T and reflection R coefficients in ballistic chaotic cavities in the presence of absorption. Analytical results for the variance of the parametric derivative of T and R, with and without time-reversal symmetry, are obtained for both asymmetric and left-right symmetric cavities. These results are valid for arbitrary number of channels, in completely agreement with the one channel case in the absence of absorption studied in the literature.
description: Modified version as accepted in PRE
ZMIENNOŚĆ CEN NA RYNKU RZEPAKU W POLSCE
Creators: name: Bełdycka-Bórawska, Aneta
name: Bórawski, Piotr
name: Jankowski, Krzysztof
name: Bełdycka-Bórawska, Aneta
name: Bórawski, Piotr
name: Jankowski, Krzysztof
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: price volatility
subject: rapeseed
subject: prognosis

description: The aim of the study was to investigate and evaluate the volatility in rapeseed market in Poland. We analyzed rapeseed and rapeseed oil. The time range covered the years 2004-2014, after Polish integration with the EU. The analysis showed an increase in prices for rapeseed and rapeseed oil after 2004. This was due to an increase in the use of rape in the petrochemical industry and feed. The increase in prices of rape after 2004 increased the acreage, which in turn led to a drop in prices of rape in 2013. The prognosis of oilseed rape and rape oil was elaborated and it shows that the prices will be declined in the future.
Parylene Photonics: A Flexible, Broadband Optical Waveguide Platform with Integrated Micromirrors for Biointerfaces
Creators: name: Reddy, Jay W.
name: Lassiter, Maya
name: Chamanzar, Maysamreza
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Targeted light delivery into biological tissue is needed in applications such as optogenetic stimulation of the brain and in vivo functional or structural imaging of tissue. These applications require very compact, soft, and flexible implants that minimize damage to tissue. Here, we demonstrate a novel implantable photonic platform based on a high-density, flexible array of ultracompact (30 $μ$m x 5 $μ$m), low-loss (3.2 dB/cm at $λ$ = 680 nm, 4.1 dB/cm at $λ$ = 633 nm, 4.9 dB/cm at $λ$ = 532 nm, 6.1 dB/cm at $λ$ = 450 nm) optical waveguides made of biocompatible polymers Parylene C and polydimethylsiloxane (PDMS). This photonic platform features unique embedded input/output micro-mirrors that redirect light from the waveguides perpendicularly to the surface of the array for localized, patterned illumination in tissue. This architecture enables the design of a fully flexible, compact integrated photonic system for applications such as in vivo chronic optogenetic stimulation of brain activity.
description: 20 pages, 7 figures, submitted to Nature Microsystems and Nanoengineering
Aperiodic quantum XXZ chains: Renormalization-group results
Creators: name: Vieira, André P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report a comprehensive investigation of the low-energy properties of antiferromagnetic quantum XXZ spin chains with aperiodic couplings. We use an adaptation of the Ma-Dasgupta-Hu renormalization-group method to obtain analytical and numerical results for the low-temperature thermodynamics and the ground-state correlations of chains with couplings following several two-letter aperiodic sequences, including the quasiperiodic Fibonacci and other precious-mean sequences, as well as sequences inducing strong geometrical fluctuations. For a given aperiodic sequence, we argue that in the easy-plane anisotropy regime, intermediate between the XX and Heisenberg limits, the general scaling form of the thermodynamic properties is essentially given by the exactly-known XX behavior, providing a classification of the effects of aperiodicity on XXZ chains. We also discuss the nature of the ground-state structures, and their comparison with the random-singlet phase, characteristic of random-bond chains.
description: Minor corrections; published version
FORMY PROMOCJI GMIN WIEJSKICH WOJEWÓDZTWA MAZOWIECKIEGO W ZALEŻNOŚCI OD ICH POZIOMU SPOŁECZNO-GOSPODARCZEGO
Creators: name: Bieńkowska-Gołasa, Wioletta
name: Bieńkowska-Gołasa, Wioletta
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: local development
subject: promotion
subject: rural municipality
subject: Mazowieckie province

description: The purpose of this paper was to present the views of the local government on the ways to promote of rural municipalities in Mazovia Province, depending on their level of socio-economic development. In the empirical method was used taxonomical development model of Z. Hellwig to assess the level of development of local communities surveyed. However, to obtain the opinion of the municipalities were used method of diagnostic survey using survey techniques by a standardized questionnaire.
title: CubeSats and space diplomacy: accelerating development by utilizing the International Space Station for earth observation satellite deployment
Creators: name: Brković, Boris
Publisher: name: TU Wien
Year: 2016
Subjects: subject: remote sensing
subject: earth observation
subject: cubesats
subject: satellite technology
subject: diplomacy

description: Satellite technology, especially satellite Earth observation, can be a central tool to foster the achievement of the Sustainable Development Goals (SDGs). As the SDGs are aspiring to create change on a global level a reliable global network is necessary to support it. This thesis argues that a suitable network, when considering satellite technology, already exists and that it can be found in the global diplomatic network in general and within the United Nations Office for Outer Space Affairs (UNOOSA) in particular. To operationalize the full potential of UNOOSA to act as a mediator of diplomatic efforts of its Member States this thesis draws on the concept of science diplomacy. Building on the concept, the term space diplomacy and its three elements- space in diplomacy, diplomacy for space, and space for diplomacy- are defined. By analysing the Japan-UNOOSA experience and putting it in relation to the development of space technology in Ethiopia the thesis concludes that UNOOSA, together with its initiatives, can be utilized as a mediator of space diplomacy efforts of its Member States ranging from basic space science to small satellite deployment. In light of the JAXA/UNOOSA KiboCUBE programme, this thesis analyses the current technology level and Earth observation applications of CubeSats and identifies trends in the global development and growth of such projects. To this end a survey is performed including all known CubeSats which were deployed form the International Space Station (ISS) since the first deployment in October 2012 until early 2016. One of the central findings is that the subsystem technologies used are rather advanced, while some progress is still necessary in the arias of attitude control systems. The current capabilities of CubeSats with respect to potential employment in Earth observation missions with a focus on vegetation measurements are assessed. Evaluating the possibilities of CubeSats to cope with the requirements set for such measurements leads to the conclusion that constellations of 3Unit CubeSats are developing into powerful tools for monitoring global, regional and local vegetation phenomena, with the central promise of combining he temporal resolution of GEO missions with the spatial resolution of LEO missions.
Photon-induced switching and tunneling phenomna in a YBCO thin film junction
Creators: name: Yang, Xi
name: Beckwith, Andrew
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the persistent photoconductivity (PPC) phenomenon, illumination of a YBCO thin film junction with a 1mW He-Ne laser leads to the decrease of the critical critical voltage (similar to the threshold voltage). The decrease of the critical votage was reversed by illumination with incadenscent light. The critical voltage across the junction was experimentally decreased and increased by alternating illumination between He-Ne laser and incandescent light. We also observed visible quenching of the photo-induced state using a 5mW He-Ne laser. Finally, the threshold behavior of the junction was destroyed by illuminating it with incadenscent light.
description: 21 pages,5 figures, article accepted for publication in CEJP as of January 2005
PORÓWNANIE OPŁACALNOŚCI PRODUKCJI KUKURYDZY UPRAWIANEJ W SYSTEMIE EKOLOGICZNYM I INTEGROWANYM
Creators: name: Bojarszczuk, Jolanta
name: Księżak, Jerzy
name: Bojarszczuk, Jolanta
name: Księżak, Jerzy
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: maize
subject: direct cost
subject: variety
subject: organic system
subject: integrated system
subject: dose of manure
subject: profitability

description: The aim of the study was to assess the economic different varieties of corn grown in the two systems: integrated and organic. The research material consisted results of a field experiment conducted in 2011-2013 at RZD Kępa IUNG-PIB Puławy. The first factor was varieties of maize: Bosman, Opoka, Ułan and Vitras, and the second factor production system: organic and integrated. The analysis showed that the integrated system are a larger share of material costs, which impact costs are applied mineral fertilizers and chemical protection (a total of 27.2%). Cultivation of maize almost all varieties of this species has guaranteed gross margin. However, almost three times higher level of gross margin provided the integrated system of maize production. The cultivation of Ułan and Vitras varieties, both as in integrated as in organic system guarantees cover the costs of revenue from its operations.
BGF-YOLO: Enhanced YOLOv8 with Multiscale Attentional Feature Fusion for Brain Tumor Detection
Creators: name: Kang, Ming
name: Ting, Chee-Ming
name: Ting, Fung Fung
name: Phan, Raphaël C. -W.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Signal Processing (eess.SP)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: I.4.6; I.5.1; J.3
subject: 68U10 (Primary) 68T10, 68T07, 62P10 (Secondary)

description: You Only Look Once (YOLO)-based object detectors have shown remarkable accuracy for automated brain tumor detection. In this paper, we develop a novel BGF-YOLO architecture by incorporating Bi-level routing attention, Generalized feature pyramid networks, and Fourth detecting head into YOLOv8. BGF-YOLO contains an attention mechanism to focus more on important features, and feature pyramid networks to enrich feature representation by merging high-level semantic features with spatial details. Furthermore, we investigate the effect of different attention mechanisms and feature fusions, detection head architectures on brain tumor detection accuracy. Experimental results show that BGF-YOLO gives a 4.7% absolute increase of mAP$_{50}$ compared to YOLOv8x, and achieves state-of-the-art on the brain tumor detection dataset Br35H. The code is available at https://github.com/mkang315/BGF-YOLO.
Robust Stochastic Optimization via Gradient Quantile Clipping
Creators: name: Merad, Ibrahim
name: Gaïffas, Stéphane
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We introduce a clipping strategy for Stochastic Gradient Descent (SGD) which uses quantiles of the gradient norm as clipping thresholds. We prove that this new strategy provides a robust and efficient optimization algorithm for smooth objectives (convex or non-convex), that tolerates heavy-tailed samples (including infinite variance) and a fraction of outliers in the data stream akin to Huber contamination. Our mathematical analysis leverages the connection between constant step size SGD and Markov chains and handles the bias introduced by clipping in an original way. For strongly convex objectives, we prove that the iteration converges to a concentrated distribution and derive high probability bounds on the final estimation error. In the non-convex case, we prove that the limit distribution is localized on a neighborhood with low gradient. We propose an implementation of this algorithm using rolling quantiles which leads to a highly efficient optimization procedure with strong robustness properties, as confirmed by our numerical experiments.
Dynamics of Hard Colloidal Cuboids in Nematic Liquid Crystals
Creators: name: Cuetos, Alejandro
name: Patti, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We perform Dynamic Monte Carlo simulations to investigate the equilibrium dynamics of hard colloidal cuboids in oblate and prolate nematic liquid crystals. In particular, we characterise the particles' diffusion along the nematic director and perpendicularly to it, and observe a structural relaxation decay that strongly depend on the particle anisotropy. To assess the Gaussianity of their dynamics and eventual occurrence of collective motion, we calculate two- and four-point correlation functions that incorporate the instantaneous values of the diffusion coefficients parallel and perpendicular to the nematic director. Our simulation results highlight the occurrence of Fickian and Gaussian dynamics at short and long times, locate the minimum diffusivity at the self-dual shape, the particle geometry that would preferentially stabilise biaxial nematics, and exclude the existence of dynamically correlated particles.
description: 8 pages, 7 figures
PODATEK VAT W ROLNICTWIE A PROCES MODERNIZACJI GOSPODARSTW ROLNYCH – STUDIUM PRZYPADKU
Creators: name: Brodzińska, Katarzyna
name: Brodzińska, Katarzyna
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: value added tax (VAT)
subject: a flat-rate farmer
subject: modernization

description: The paper presents VAT balance based on the example of three farms varying in agricultural area, direction of production and period of accounting VAT under a general basis. On the basis of the analyzes, it was found that regardless of the outcome of a VAT settlement from continuing operations, the possibility of a full deduction of the tax on investment becomes a stimulator in the process of modernization of these farms.