cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Web Usage Mining Using Artificial Ant Colony Clustering and Genetic Programming
Creators: name: Abraham, Ajith
name: Ramos, Vitorino
Publisher: name: arXiv
Year: 2004
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences
subject: I.5; I.5.3; I.4; I.2.11

description: The rapid e-commerce growth has made both business community and customers face a new situation. Due to intense competition on one hand and the customer's option to choose from several alternatives business community has realized the necessity of intelligent marketing strategies and relationship management. Web usage mining attempts to discover useful knowledge from the secondary data obtained from the interactions of the users with the Web. Web usage mining has become very critical for effective Web site management, creating adaptive Web sites, business and support services, personalization, network traffic flow analysis and so on. The study of ant colonies behavior and their self-organizing capabilities is of interest to knowledge retrieval/management and decision support systems sciences, because it provides models of distributed adaptive organization, which are useful to solve difficult optimization, classification, and distributed control problems, among others. In this paper, we propose an ant clustering algorithm to discover Web usage patterns (data clusters) and a linear genetic programming approach to analyze the visitor trends. Empirical results clearly shows that ant colony clustering performs well when compared to a self-organizing map (for clustering Web usage patterns) even though the performance accuracy is not that efficient when comparared to evolutionary-fuzzy clustering (i-miner) approach. KEYWORDS: Web Usage Mining, Swarm Intelligence, Ant Systems, Stigmergy, Data-Mining, Linear Genetic Programming.
description: 8 pages, 11 figures, at http://alfa.ist.utl.pt/~cvrm/staff/vramos/ref_48.html
A hyperbolic parametrization of lepton mixing for small $U_{e3}$
Creators: name: Brahmachari, Biswajoy
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use hyperbolic functions to parametrize lepton mixing matrix using only one input parameter $ϕ$. This matrix has three mixing angles as outputs therefore giving two predictions. In particular it predicts $U_{e3}=0$ besides predicting correct solar and atmospheric mixing. We confine us to real $ϕ$. For complex $ϕ$ mixing matrix is no longer unitary. Next we accentuate this unitary mixing matrix with an additional small parameter $δ$ while keeping unitarity of the matrix exact. When this second parameter is included, with this framework, one can handle small but non-zero $U_{e3}$. In the second case from two input parameters one obtains three mixing angles thus one prediction.
description: version accepted to appear in Mod. Phys. Lett. A
Innovación en el cultivo de quinua en Bolivia: efectos de la interacción social y de las capacidades de absorción de los pequeños productores
Creators: name: Soto, Jose Luis
name: Hartwich, Frank
name: Monge, Mario
name: Ampuero, Luis
name: Soto, Jose Luis
name: Hartwich, Frank
name: Monge, Mario
name: Ampuero, Luis
Publisher: name: Unknown
Year: 2006
Subjects: Research and Development/Tech Change/Emerging Technologies

description: This report analyzes the relationship between the adoption of innovation packages in quinoa cultivation and absorptive capabilities in resource poor farming communities in four micro-regions of the Bolivian Altiplano. The innovation packages studied consist of: the use of special seeders (SATIRI), seeding of improved varieties, application of special pest and disease control measures, application of animal manure, introducing “singing” tapes against birds, use of special baskets for seeding, special harvesting techniques (sickle cut), an application new threshing technology. These components of innovation packages have been used to varying degrees with different channels of information exchange and training methods, resulting in various levels of benefit to the producers.
Capacitance matrix revisited
Creators: name: Smolić, Ivica
name: Klajn, Bruno
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The capacitance matrix relates potentials and charges on a system of conductors. We review and rigorously generalize its properties, block-diagonal structure and inequalities, deduced from the geometry of system of conductors and analytic properties of the permittivity tensor. Furthermore, we discuss alternative choices of regularization of the capacitance matrix, which allow us to find the charge exchanged between the conductors having been brought to an equal potential. Finally, we discuss the tacit approximations used in standard treatments of the electric circuits, demonstrating how the formulae for the capacitance of capacitors connected in parallel and series may be recovered from the capacitance matrix.
description: ver. 2: 18 pages, 7 figures; minor revision, accepted for publication in PIER B
Process development for the production of pancreatic islet equivalents
Creators: name: Luu, Minh
Publisher: name: University of British Columbia
Year: 2009

description: The Edmonton Protocol has shown that islet transplantation can reverse type-1 diabetes, but there are not enough donors available to make it a widespread application. The purpose of this work was to apply techniques, such as design of experiments and bioreactor culture methods, to facilitate islet derivation from pancreatic stem cells. Neonatal porcine pancreatic cell clusters (NPCCs) were used as a model system and a two-step approach of expansion followed by differentiation was taken. When cultured in suspension, total cell numbers decreased over time and a factorial experiment involving the addition of EGF, VEGF, KGF and HGF did not yield any significant improvements. A dose response experiment indicated that the tested concentrations of 50 ng/mL was higher than necessary. The heterogeneity of the cultures required that specific populations be examined. Based upon studies suggesting that ductal cells contained islet progenitors, ductal cells were selected as a target population to expand. When NPCCs were dissociated into a single cell suspension and cultured in monolayers, the proportion of cells expressing CK7 (a ductal cell marker) increased to 95% 9 days after isolation but decreased to 39% by day 12. To elucidate which growth factors might sustain CK7+ cell proliferation, a factorial analysis of EGF, VEGF, KGF, HGF and bFGF was performed. HGF had the most promising effects in that it promoted both cell attachment and CK7+ cell proliferation. The maturation of NPCCs was also examined. Insulin/DNA of NPCCs cultured in suspension increased 2-fold whereas culturing NPCCs in alginate and 5% NPS increased insulin/DNA even further (4-fold compared to controls). The existing forms of alginate immobilization are either not readily scalable (slabs) or require a generation unit (beads). A hollow-fiber bioreactor (HFBR) was investigated as a novel system for generating -100 mL alginate cultures, which would meet the 106 islets required per patient. The alginate was loaded into the extracapillary space and gelled by passing a Ca2+ solution through the intracapillary space (ICS). High ICS flow rates (300 mL/min) reduced alginate plugging of the fibers as assessed by residence time distribution analysis. Cell recoveries after de-gelling were >90%. A cell growth experiment with CHO cells demonstrated that the HFBR provides a rapid, closed means of culturing alginate-immobilized cells at a patient scale.
Tommy Cleaner
Creators: name: Maribel Quispe, Y.
name: Ana Angles, Q.
name: Rodrigo Olaechea, S.
name: José Monroy, V.
Publisher: name: Zenodo
Year: 2021
Subjects: Juego 2D
Contaminación
Plataformas

description: En el presente poster se muestran descripciones de un juego básico plataformero, con el propósito de concientizar sobre el problema de la contaminación. Tú eres Tommy, quién quiere eliminar a los Grunt’s y la basura que va aumentado en su hogar, la isla Dirty Island. Link del juego: https://jhos333.itch.io/tommy-cleaner
description: Demo
Capacity Development as a Research Domain: Frameworks, Approaches, and Analytics
Creators: name: Babu, Suresh Chandra
name: Sengupta, Debdatta
name: Babu, Suresh Chandra
name: Sengupta, Debdatta
Publisher: name: Unknown
Year: 2006
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: Capacity development

description: Strengthening national capacity for designing public policies and program interventions is fundamental for achieving development goals. Yet results of capacity strengthening programs have shown mixed results in the last fifty years. Capacity development, as a field of scientific enquirty still lacks a unified framework among development professionals. Capacity development is defined as the process by which individuals, groups, organizations, institutions, and societies increase their ability to perform core functions, solve problems, define and achieve objectives, and understand and sustainably deal with development issues. The concept of capacity as an integral component of development agendas is not new, yet it has only recently been acknowledged that development plans and goals cannot be achieved without adequate local capacity. Increased attention to the lack of capacity and the absence of relevant institutions has brought to light their importance in the successful design, implementation, and evaluation of development plans, programs, and policies. Despite this now common wisdom, research-based information on how to strengthen institutions and institutional capacity in developing countries is severely lacking. This paper attempts to review the emerging theories, frameworks, approaches, and analytics of capacity development. After developing a rationale for capacity development research, it presents potential research themes. Arguing for a new economics of capacity development, it concludes with some possible impacts of considering capacity strengthening as a research domain.
Building an Agricultural Research for Development System in Africa
Creators: name: Mbabu, Adiel N.
name: Ochieng, Cosmas M.O.
name: Mbabu, Adiel N.
name: Ochieng, Cosmas M.O.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: Agricultural research for development
subject: Organization and management of agricultural research
subject: Africa

description: This paper discusses how impact-oriented agricultural research for development systems in Africa can be better organized and managed. Specifically, the paper puts forth the argument that achieving the development targets set by African leaders and the international community, for example, through the Millennium Development Goals, will be extremely difficult without a satisfactory re-orientation of the organization and management of African research for development systems. Such a re-orientation involves carefully linking the agricultural research agenda with national development priorities; improving coordination, interaction, interlinkages, partnerships, and networks among system agents—that is, agricultural research institutes, extension systems, higher education institutions, farmer organizations, civil society, and the private sector—and finding innovative financing and resourcing mechanisms to support the numerous components of the system. Keywords:
Non-archimedean amoebas and tropical varieties
Creators: name: Einsiedler, Manfred
name: Kapranov, Mikhail
name: Lind, Douglas
Publisher: name: arXiv
Year: 2004
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 14J29, 13A18, 13C15, 13E15

description: We study the non-archimedean counterpart to the complex amoeba of an algebraic variety, and show that it coincides with a polyhedral set defined by Bieri and Groves using valuations. For hypersurfaces this set is also the tropical variety of the defining polynomial. Using non-archimedean analysis and a recent result of Conrad we prove that the amoeba of an irreducible variety is connected. We introduce the notion of an adelic amoeba for varieties over global fields, and establish a form of the local-global principle for them. This principle is used to explain the calculation of the nonexpansive set for a related dynamical system.
description: 19 pages, 2 figures. Added AIM preprint number
On the Uneven Distribution of Innovative Capabilities and Why That Matters for Research, Extension and Development Policies
Creators: name: Ekboir, Javier M.
name: Munoz, Manrrubio
name: Aguilar, Jorge
name: Mendel, Roberto Rendon
name: Muniz, Jose G. Garcia
name: Cardenas, J. Reyes Altamirano
name: Ekboir, Javier M.
name: Munoz, Manrrubio
name: Aguilar, Jorge
name: Mendel, Roberto Rendon
name: Muniz, Jose G. Garcia
name: Cardenas, J. Reyes Altamirano
Publisher: name: Unknown
Year: 2006
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: innovation
subject: exploration
subject: participatory research
subject: creativity
subject: absorptive capabilities

description: Agricultural development policies and programs, including extension and support for innovation, implicitly assume that the whole target population has the ability to innovate. Recent research in neuroscience, education, social sciences and psychology has shown that innovative capabilities are distributed very unevenly. We explored the distribution of innovative capabilities and the ability to integrate a technological package in a sample of commercial lemon producers in Mexico. We have found that the ability to explore new techniques is different from the ability to integrate an efficient production and commercial package. The ability to explore follows an exponential distribution while integration of the package follows a bimodal distribution. The ability to explore depends on the farmer’s connection to a variety of information sources, but not to his/her ability to integrate a technical package. Exploration is also not linked to education, age or credit access. Integration of a production package, on the other hand, depends on more traditional variables such as credit access. These findings have important implications for the design of development programs, including extension and participatory research.
Additional file 5 of The significance of m6A RNA methylation regulators in predicting the prognosis and clinical course of HBV-related hepatocellular carcinoma
Creators: name: Qiongxuan Fang
name: Chen, Hongsong
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 5: Table S5. Identification of the independent prognostic role of prognostic gene signature by univariate analyses using the Cox regression model.
SI-spreading-based network embedding in static and temporal networks
Creators: name: Zhan, Xiu-Xiu
name: Li, Ziyu
name: Masuda, Naoki
name: Holme, Petter
name: Wang, Huijuan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Link prediction can be used to extract missing information, identify spurious interactions as well as forecast network evolution. Network embedding is a methodology to assign coordinates to nodes in a low dimensional vector space. By embedding nodes into vectors, the link prediction problem can be converted into a similarity comparison task. Nodes with similar embedding vectors are more likely to be connected. Classic network embedding algorithms are random-walk-based. They sample trajectory paths via random walks and generate node pairs from the trajectory paths. The node pair set is further used as the input for a Skip-Gram model, a representative language model that embeds nodes (which are regarded as words) into vectors. In the present study, we propose to replace random walk processes by a spreading process, namely the susceptible-infected (SI) model, to sample paths. Specifically, we propose two SI-spreading-based algorithms, SINE and TSINE, to embed static and temporal networks, respectively. The performance of our algorithms is evaluated by the missing link prediction task in comparison with state-of-the-art static and temporal network embedding algorithms. Results show that SINE and TSINE outperform the baselines across all six empirical datasets. We further find that the performance of SINE is mostly better than TSINE, suggesting that temporal information does not necessarily improve the embedding for missing link prediction. Moreover, we study the effect of the sampling size, quantified as the total length of the trajectory paths, on the performance of the embedding algorithms. The better performance of SINE and TSINE requires a smaller sampling size in comparison with the baseline algorithms. Hence, SI-spreading-based embedding tends to be more applicable to large-scale networks.
Kinematics of W UMa-type binaries and evidences on the two types of formation
Creators: name: Bilir, S.
name: Karatas, Y.
name: Demircan, O.
name: Eker, Z.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The kinematics of 129 W UMa binaries is studied and its implications on the contact binary evolution is discussed. The sample is found to be heterogeneous in the velocity space that kinematically younger and older contact binaries exist in the sample. Kinematically young (0.5 Gyr) sub-sample (MG) is formed by selecting the systems which are satisfying the kinematical criteria of moving groups. After removing the possible MG members and the systems which are known to be members of open clusters, the rest of the sample is called Field Contact Binaries (FCB). The FCB has further divided into four groups according to The orbital period ranges. Then a correlation has been found in the sense that shorter period less massive systems have larger velocity dispersions than the longer period more massive systems. Dispersions in the velocity space indicates 5.47 Gyr kinematical age for the FCB group. Comparing with the field chromospherically active binaries (CAB), presumably detached binary progenitors of the contact systems, the FCB appears to be 1.61 Gyr older. Assuming an equilibrium in the formation and destruction of CAB and W UMa systems in the Galaxy, this age difference is treated as empirically deduced lifetime of the contact stage. Since the kinematical ages of the four sub groups of FCB are much longer than the 1.61 Gyr lifetime of the contact stage, the pre-contact stages of FCB must dominantly be producing the large dispersions. The kinematically young (0.5 Gyr) MG group covers the same total mass, period and spectral ranges as the FCB. But, the very young age of this group does not leave enough room for pre-contact stages, thus it is most likely that those systems were formed in the beginning of the main-sequence or during the pre-main-sequence contraction phase.
description: 19 pages, including 11 figures and 5 tables, accepted for publication in MNRAS
Quantum adiabatic brachistochrone for open systems
Creators: name: Santos, Alan C.
name: Villas-Boas, Celso J.
name: Bachelard, Romain
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a variational principle to compute a quantum adiabatic brachistochrone (QAB) for open systems. Using the notion of "adiabatic speed" based on the energy gaps, we derive a Lagrangian associated to the functional measuring the time spent to achieve adiabatic behavior, which in turn allows us to perform the optimization. The QAB is illustrated for non-unitary dynamics of STIRAP process, the Deutsch-Jozsa quantum computing algorithm and of a transmon qutrit. A numerical protocol is devised, which allows to compute the QAB for arbitrary quantum systems for which exact simulations can be afforded. We also establish sufficient conditions for the equivalence between the Lagrangians, and thus the QAB, of open and closed systems.
description: 7 pages (with Appendix) and 3 figures (with sub-figures)
Additional file 3 of The significance of m6A RNA methylation regulators in predicting the prognosis and clinical course of HBV-related hepatocellular carcinoma
Creators: name: Qiongxuan Fang
name: Chen, Hongsong
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 3: Table S3. The coefficient of the identified genes.
Negative Confidence-Aware Weakly Supervised Binary Classification for Effective Review Helpfulness Classification
Creators: name: Wang, Xi
name: Ounis, Iadh
name: Macdonald, Craig
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: The incompleteness of positive labels and the presence of many unlabelled instances are common problems in binary classification applications such as in review helpfulness classification. Various studies from the classification literature consider all unlabelled instances as negative examples. However, a classification model that learns to classify binary instances with incomplete positive labels while assuming all unlabelled data to be negative examples will often generate a biased classifier. In this work, we propose a novel Negative Confidence-aware Weakly Supervised approach (NCWS), which customises a binary classification loss function by discriminating the unlabelled examples with different negative confidences during the classifier's training. We use the review helpfulness classification as a test case for examining the effectiveness of our NCWS approach. We thoroughly evaluate NCWS by using three different datasets, namely one from Yelp (venue reviews), and two from Amazon (Kindle and Electronics reviews). Our results show that NCWS outperforms strong baselines from the literature including an existing SVM-based approach (i.e. SVM-P), the positive and unlabelled learning-based approach (i.e. C-PU) and the positive confidence-based approach (i.e. P-conf) in addressing the classifier's bias problem. Moreover, we further examine the effectiveness of NCWS by using its classified helpful reviews in a state-of-the-art review-based venue recommendation model (i.e. DeepCoNN) and demonstrate the benefits of using NCWS in enhancing venue recommendation effectiveness in comparison to the baselines.
description: CIKM 2020
IQTSODIY MAMLAKATLARDA BOZOR
Creators: name: Jumanazarov Zohid Shodmonovich
Publisher: name: Zenodo
Year: 2024

description:  Annotatsiya: Ushbu maqolada iqtisodiy rivojlangan mamlakatlarda bozor munosabatlarining o'ziga xos xususiyatlari, rivojlanish tendensiyalari va zamonaviy muammolari tahlil qilinadi. Tadqiqot natijalariga ko'ra, rivojlangan mamlakatlarda bozor mexanizmlari yuqori darajada takomillashgan bo'lib, davlat tomonidan samarali tartibga solinadi. Maqolada erkin raqobat, narx shakllanishi, talab va taklif muvozanati, innovatsiyalar, moliya bozorlari va xalqaro savdo kabi asosiy bozor elementlari ko'rib chiqiladi. Shuningdek, globallashuv, raqamli texnologiyalar va ekologik muammolar sharoitida bozor iqtisodiyotining transformatsiyasi masalalari muhokama qilinadi. Maqolada bozor munosabatlarini yanada takomillashtirish, ijtimoiy adolatni ta'minlash va barqaror iqtisodiy o'sishga erishish bo'yicha tavsiyalar beriladi.

Kalit so'zlar: bozor iqtisodiyoti, rivojlangan mamlakatlar, erkin raqobat, narx shakllanishi, talab va taklif, innovatsiyalar, moliya bozorlari, xalqaro savdo, globallashuv, raqamli iqtisodiyot, davlat tartibga solishi.
Microscopic Theory for the Quantum to Classical Crossover in Chaotic Transport
Creators: name: Whitney, Robert S.
name: Jacquod, Ph.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We present a semiclassical theory for the scattering matrix ${\cal S}$ of a chaotic ballistic cavity at finite Ehrenfest time. Using a phase-space representation coupled with a multi-bounce expansion, we show how the Liouville conservation of phase-space volume decomposes ${\cal S}$ as ${\cal S}={\cal S}^{\rm cl} \oplus {\cal S}^{\rm qm}$. The short-time, classical contribution ${\cal S}^{\rm cl}$ generates deterministic transmission eigenvalues T=0 or 1, while quantum ergodicity is recovered within the subspace corresponding to the long-time, stochastic contribution ${\cal S}^{\rm qm}$. This provides a microscopic foundation for the two-phase fluid model, in which the cavity acts like a classical and a quantum cavity in parallel, and explains recent numerical data showing the breakdown of universality in quantum chaotic transport in the deep semiclassical limit. We show that the Fano factor of the shot-noise power vanishes in this limit, while weak localization remains universal.
description: PRL version, added comment about 2 Ehrenfest times (4pages, 2figs)
Speculations in hadron spectroscopy
Creators: name: Richard, J. -M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A selected survey is presented of the recent progress in hadron spectroscopy. This includes spin-singlet charmonium states, excitations of charmonium and open-charm mesons, double-charm baryons, and pentaquark candidates. Models proposing exotic bound states or resonances are reviewed. The sector of exotic mesons with two heavy quarks appears as particularly promising.
Additional file 4 of The significance of m6A RNA methylation regulators in predicting the prognosis and clinical course of HBV-related hepatocellular carcinoma
Creators: name: Qiongxuan Fang
name: Chen, Hongsong
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 4: Table S4. Comparison of the riskScore model with stage, gender, age, and grade models.
Regional policy networks: IFPRI's experience with decentralization
Creators: name: Paarlberg, Robert L.
name: Paarlberg, Robert L.
Publisher: name: Unknown
Year: 2005
Subjects: Research and Development/Tech Change/Emerging Technologies

description: IFPRI, traditionally a centralized development organization, is now embracing networks as one institutional strategy to achieve “regional decentralization.” Since 1999 IFPRI has developed and operated two formal regional networks, in East Africa and South Asia, and additional regional networks have been envisioned for Southern Africa and Central America. IFPRI is also decentralizing some of its work on a bilateral basis within individual countries without reliance on regional networks. This paper conceptualizes, maps out, and assesses IFPRI’s various decentralization initiatives.
Hydrodynamization and non-equilibrium Green's functions in kinetic theory
Creators: name: Kamata, Syo
name: Martinez, Mauricio
name: Plaschke, Philip
name: Ochsenfeld, Stephan
name: Schlichting, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Non-equilibrium Green's functions provide an efficient way to describe the evolution of the energy-momentum tensor during the early time pre-equilibrium stage of high-energy heavy ion collisions. Besides their practical relevance they also provide a meaningful way to address the question when and to what extent a hydrodynamic description of the system becomes applicable. Within the kinetic theory framework we derive a new method to calculate time dependent non-equilibrium Green's functions describing the evolution of energy and momentum perturbations on top of an evolving far-from-equilibrium background. We discuss the approach towards viscous hydrodynamics along with the emergence of various scaling phenomena for conformal systems. By comparing our results obtained in the relaxation time approximation to previous calculations in Yang-Mills kinetic theory, we further address the question which macroscopic features of the energy momentum tensor are sensitive to the underlying microscopic dynamics.
description: 18 pages, 8 figures
Vertical Coordination and Grower Organization in the Supermarket Fruit and Vegetables Supply Chain in Croatia
Creators: name: Goetz, Linde
name: Njavro, Mario
name: Hanf, Jon Henrich
name: Pieniadz, Agata
name: Goetz, Linde
name: Njavro, Mario
name: Hanf, Jon Henrich
name: Pieniadz, Agata
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: supermarket supply chain
subject: vertical coordination
subject: fruit and vegetables
subject: farm assistance
subject: producer organization

description: Abstract: The means by which fruit and vegetables growers are linked with the upstream partners in the supermarket supply chain are investigated in 15 semi-structured interviews with inter alia the managers of Croatia’s five major supermarket chains. Contrasting to existing literature we find that supermarkets vertically coordinate with larger growers directly through loose 1-year marketing contracts specifying the terms of payment, without giving financial or technical assistance to the farmers. An exception is the largest Croatian supermarket which has a dominant position in the market and sometimes provides comprehensive farm assistance or even fully vertically integrates farm production. Wholesalers more often provide farm assistance to FFV growers. Though, in the future it can be expected that the wholesalers drop out of the FFV supermarket supply chain. The major bottleneck for farmers to directly supply to the supermarket chains is the access to a distribution facility for grading, sorting and packaging of FFV. Also, farmers need to organize to meet the supermarkets’ minimum quantity requirements. Since bad experience with cooperatives in the communist era is widespread, farmers distaste cooperatives and the degree of organization of FFV growers in Croatia is very low. We present an innovative model for a producer organization which could overcome the main challenges growers face in the FFV supermarket supply chain and secure that even small farmers participate. Also, we outline policy measures for the Croatian government and the European Commission to foster this development.
Minihalo photoevaporation during cosmic reionization: evaporation times and photon consumption rates
Creators: name: Iliev, Ilian T.
name: Shapiro, Paul R.
name: Raga, Alejandro C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The weak, R-type ionization fronts (I-fronts) which swept across the intergalactic medium (IGM) during the reionization of the universe often found their paths blocked by cosmological minihaloes. When this happened, the neutral gas which filled each minihalo was photoevaporated; as the I-front burned its way through the halo, decelerating from R-type to D-type, all the gas was blown back into the IGM as an ionized, supersonic wind. In a previous paper (Shapiro, Iliev and Raga 2004), we described this process and presented our results of the first simulations of it by numerical gas dynamics with radiation transport in detail. For illustration we focused on the particular case of a 10^7 solar masses minihalo overrun at z=9 by an intergalactic I-front caused by a distant source of ionizing radiation, for different source spectra (either stellar from massive Pop. II or III stars, or QSO-like) and a flux level typical of that expected during reionization. In a LambdaCDM universe, minihaloes formed in abundance before and during reionization and, thus, their photoevaporation is an important, possibly dominant, feature of reionization, which slowed it down and wasted ionizing photons. We have now performed a larger set of high-resolution simulations to determine and quantify the dependence of minihalo photoevaporation times and photon consumption rates on halo mass, redshift, ionizing flux level and spectrum. We find that the average number of ionizing photons each minihalo atom absorbs during its photoevaporation is typically in the range 2-10. For the collapsed fraction in minihaloes expected during reionization, this can add about 1 photon per total atom to the requirements for completing reionization, potentially doubling the minimum number of photons required to reionize the universe.
description: 11 pages, 6 figures, submitted to MNRAS
Perfusion culture : investigation of temperature distribution in an acoustic separator
Creators: name: Drouin, Hans
Publisher: name: University of British Columbia
Year: 2009

description: Mammalian cell perfusion cultures require practical and efficient cell retention devices that maintain high performance while minimizing negative influences on the culture. The acoustic separator is a mechanically simple device that provides high separation efficiency for months of continuous operation. The cells are retained in the chamber by acoustic forces whose magnitude is limited because the acoustic energy is ultimately dissipated as heat. On the other hand, the cell suspension, pumped into the acoustic separator through a recirculation line, is cooled somewhat by heat transfer to the ambient environment. Thus, the thermal control of the acoustic filter is essential to avoid negative effects on the cell culture while maximizing efficient separation. The purpose of this work was to investigate the thermal aspects of acoustic separations. Cell culture experiments demonstrated that CHO cells could be exposed to a cyclic temperature variation from 31.5 to 38.5°C, in a simulated acoustic separator environment, without significant effects on their growth rate, glucose consumption or t-PA production. Following an investigation of the acoustic separator recommended settings, a minimal recirculation flow rate of 15 L day⁻¹, at an ambient temperature of 22°C with a 45 s run time was found to provide efficient operation with limited environmental influences on the cells. Nonetheless, for a reactor cell concentration of 107 cells mL⁻¹ and a 5L day⁻¹ harvest flow rate, the separation efficiency was greater than 95% for ambient temperatures from 19 to 26°C. Air cooling flow rates from 0 to 16 L min⁻¹ did not perturb the separation efficiency of the system though air cooling was required to limit the temperature increase. A central composite factorial design experiment was used to obtain surface response models of the inlet and outlet temperatures as well as the inlet to outlet temperature change. These empirical models provided a tool to help optimize acoustic separator operation (i.e., selecting conditions that ensure temperatures are maintained in the acceptable range). Also, a theoretical model of the acoustic separator was developed, based on energy conservation, which provided an estimate of the 3- dimensional temperature distribution in the device. Once all of the unknown parameters had been determined by fitting the model to measured temperature data, it was able to predict the outlet temperatures to within 1°C. It was estimated that 56% of the power input was transformed into heat in the liquid compared with 6.5% in the transducer wall and 2% in the reflector wall. It was assumed that the remainder was lost due to the conversion of electric to acoustic energy and to conduction and eventual dissipation to the surroundings through the other solid components of the separator. Temperature profiles generated by the model as well as experimental measurements confirmed that the air cooling device was essential to control the temperature in the acceptable range.
A Deep Convolutional Neural Network Model for improving WRF Forecasts
Creators: name: Sayeed, Alqamah
name: Choi, Yunsoo
name: Jung, Jia
name: Lops, Yannic
name: Eslami, Ebrahim
name: Salman, Ahmed Khan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Advancements in numerical weather prediction models have accelerated, fostering a more comprehensive understanding of physical phenomena pertaining to the dynamics of weather and related computing resources. Despite these advancements, these models contain inherent biases due to parameterization and linearization of the differential equations that reduce forecasting accuracy. In this work, we investigate the use of a computationally efficient deep learning method, the Convolutional Neural Network (CNN), as a post-processing technique that improves mesoscale Weather and Research Forecasting (WRF) one day forecast (with a one-hour temporal resolution) outputs. Using the CNN architecture, we bias-correct several meteorological parameters calculated by the WRF model for all of 2018. We train the CNN model with a four-year history (2014-2017) to investigate the patterns in WRF biases and then reduce these biases in forecasts for surface wind speed and direction, precipitation, relative humidity, surface pressure, dewpoint temperature, and surface temperature. The WRF data, with a spatial resolution of 27 km, covers South Korea. We obtain ground observations from the Korean Meteorological Administration station network for 93 weather station locations. The results indicate a noticeable improvement in WRF forecasts in all station locations. The average of annual index of agreement for surface wind, precipitation, surface pressure, temperature, dewpoint temperature and relative humidity of all stations are 0.85 (WRF:0.67), 0.62 (WRF:0.56), 0.91 (WRF:0.69), 0.99 (WRF:0.98), 0.98 (WRF:0.98), and 0.92 (WRF:0.87), respectively. While this study focuses on South Korea, the proposed approach can be applied for any measured weather parameters at any location.
description: CNN, weather forecast, WRF, Artificial Intelligence, Machine Learning, wind speed forecast, rainfall forecast
Multipartite entanglement in quantum spin chains
Creators: name: Bruss, D.
name: Datta, N.
name: Ekert, A.
name: Kwek, L. C.
name: Macchiavello, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the occurrence of multipartite entanglement in spin chains. We show that certain genuine multipartite entangled states, namely W states, can be obtained as ground states of simple XX type ferromagnetic spin chains in a transverse magnetic field, for any number of sites. Moreover, multipartite entanglement is proven to exist even at finite temperatures. A transition from a product state to a multipartite entangled state occurs when decreasing the magnetic field to a critical value. Adiabatic passage through this point can thus lead to the generation of multipartite entanglement.
description: 4 pages, 1 figure
title: Bulgarian Language in the 18th Century Represented in Sofroniy Vrachanski’s Idiolect
Creators: name: Alexandrova, Nadezhda
Publisher: name: Universität Graz
Year: 2020

description: In: Daniela Haarmann / Konrad Petrovszky (eds.), Language and Society in 18th Century South Eastern Europe / Sprache und Gesellschaft in Südosteuropa im 18. Jahrhundert, Yearbook of the Society for 18th Century Studies on South Eastern Europe 3 (2020), 164–177.
Lopsided spiral galaxies: evidence for gas accretion
Creators: name: Bournaud, F.
name: Combes, F.
name: Jog, C. J.
name: Puerari, I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We quantify the degree of lopsidedness for a sample of 149 galaxies observed in the near-infrared from the OSUBGS sample, and try to explain the physical origin for the observed disk lopsidedness. We confirm previous studies, but now for a larger sample, that a large fraction of galaxies show significant lopsidedness in their stellar disks, measured as the Fourier amplitude of the m=1 component, normalised to the average or m=0 component, in the surface density. Late-type galaxies are found to be more lopsided, while the presence of m=2 spiral arms and bars is correlated. The m=1 amplitude is found to be uncorrelated with the tidal forces acting on a galaxy via nearby companions. Numerical simulations are carried out to study the generation of m=1 via different processes: galaxy tidal encounters, galaxy mergers, and external gas accretion and subsequent star formation. The simulations show that galaxy interactions and mergers can trigger strong lopsidedness, but do not explain several independent statistical properties of observed galaxies. To explain all the observational results, it is required that a large fraction of lopsidedness results from cosmological accretion of gas on galactic disks, which can create strongly lopsided disks when this accretion is asymmetrical enough.
description: accepted for publication in Astronomy and Astrophysics - Final version after language edition
Additional file 1 of The significance of m6A RNA methylation regulators in predicting the prognosis and clinical course of HBV-related hepatocellular carcinoma
Creators: name: Qiongxuan Fang
name: Chen, Hongsong
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Table S1. Differentially expressed m6A RNA methylation regulators were identified in tumor tissues when compared with normal tissues.
Cooperative vs. Non-Cooperative Spatial Competition for Milk in the Presence of Farm Marketing Cooperatives
Creators: name: Graubner, Marten
name: Koller, Ines
name: Salhofer, Klaus
name: Balmann, Alfons
name: Graubner, Marten
name: Koller, Ines
name: Salhofer, Klaus
name: Balmann, Alfons
Publisher: name: Unknown
Year: 2009
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: spatial competition
subject: uniform delivered pricing
subject: price transmission
subject: horizontal cooperation
subject: VECM

description: Although important, the spatial dimension is often neglected in studies of market power and competition in agricultural markets. This paper investigates spatial competition for raw milk between dairies under the presence of marketing cooperatives. Since observed in reality, our model is based on uniform delivered pricing and overlapping market areas. We compare spatial cooperative price matching with non-cooperative Hotelling-Smithies conduct. Utilizing a vector error correction model we show that the observed low price transmission in Germany is in line with cooperative behaviour. This seems rational since it increases processors profits. The abolition of the quota system may increase price transmission.
title: L’impegno dell’Università di Cagliari per lo sviluppo sostenibile. Report 2019-2022
Creators: name: Zedda, Daniela
Publisher: name: UNICApress
Year: 2024

description: Da diversi anni ormai l’Università di Cagliari è impegnata nell’adozione di politiche nel campo della sostenibilità che si sono tradotte in obiettivi strategici da raggiungere attraverso azioni concrete coerenti con gli Obiettivi dell’Agenda ONU 2030 e con la relativa Strategia nazionale e regionale sullo Sviluppo sostenibile. Soprattutto negli ultimi anni è stata crescente l’attenzione verso una gestione integrata degli impatti ambientali e sociali della sostenibilità derivanti dalle molteplici attività che quotidianamente vengono realizzate dall’Università, le quali producono un impatto sia in termini di impronta ecologica sia di ricadute a livello sociale. La sostenibilità è infatti un valore trasversale a tutte le attività dell’Ateneo.

Scopo di questo documento è descrivere i passi più significativi compiuti in questi anni dall’Ateneo lungo il complesso percorso dello sviluppo sostenibile, per dare testimonianza degli sforzi profusi per raggiungere gli obiettivi ma anche degli aspetti che devono essere ancora rafforzati.
MaxDiff approaches for PDO “Calanda” peaches (Spain)
Creators: name: Groot, Etienne
name: Albisu, Luis Miguel
name: Groot, Etienne
name: Albisu, Luis Miguel
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: best-worst
subject: exploding models
subject: consumer behavior
subject: choice experiment
subject: fruit quality.

description: Peaches with PDO Calanda are one of the 20 fruits with PDO existing in Spain. The aim of this work is to understand how consumers make their choices based on the most important peaches’ attributes and levels. In this work, 4 attributes with 3 levels in each attribute have been considered (price: 1.5 €/kg, 2.5 €/kg and 3.5 €/kg; origin: PDO Calanda, non PDO Calanda and non Calanda; packaging: bulk, conventional packaging and active packaging; and fruit size: small, medium and big). Four Best-Worst (BW) exploded models have been utilised, two of them with scale factors. All those models have been compared to two traditional Discrete Choice (DC) models. Results show that traditional DC models have better performance than the other models and the best model is when consumers select the best option. Within the exploded models, the choice sequence decisions starting from worst options are better than those which start from best option. Consumers prefer PDO Calanda peaches over other types and the positive difference in their Willingness to Pay (WTP) are more or less the same between peaches from Calanda with PDO and without PDO as it is between the latter and peaches coming from other origins.
Commercial Ornamental Horticulture: Size of Establishment and Crop Specialization of Growers
Creators: name: Fossum, M. Truman
name: Fossum, M. Truman
Publisher: name: Unknown
Year: 1955
Subjects: subject: Crop Production/Industries
subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics

description: Excerpt from the report Introduction: The purpose of this report, and of the research it summarizes, is to provide detailed data for commercial growers of ornamental horticultural crops by size of establishment and by crop specialization. All of the data were obtained by special tabulations from Bureau of the Census figures. This report is confined to summary data for the United States. To the extent that rules of disclosure permit, comparable information by States and geographic divisions is available.
Additional file 2 of The significance of m6A RNA methylation regulators in predicting the prognosis and clinical course of HBV-related hepatocellular carcinoma
Creators: name: Qiongxuan Fang
name: Chen, Hongsong
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2: Table S2. Univariate Cox regression analysis was constructed to confirm prognostic genes, and genes were considered significantly with a cut-off of P. Value
El Farol Revisited
Creators: name: Lus, Hilmi
name: Aydin, Cevat Onur
name: Keten, Sinan
name: Unsal, Hakan Ismail
name: Atilgan, Ali Rana
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: This article is concerned with the global behavior of agents in the El Farol bar problem. In particular, we discuss the global attendance in terms of its mean and variance, and show that there is a strong dependence of both on the externally imposed comfort level. We present a possible interpretation for the observed behavior, and propose that the mean attendance converges to the perceived threshold value as opposed to the actually imposed one.
description: 6 pages, 3 figures