cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The shapes, orientation, and alignment of Galactic dark matter subhalos
Creators: name: Kuhlen, M.
name: Diemand, J.
name: Madau, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a study of the shapes, orientations, and alignments of Galactic dark matter subhalos in the ``Via Lactea'' simulation of a Milky Way-size LCDM host halo. Whereas isolated dark matter halos tend to be prolate, subhalos are predominantly triaxial. Overall subhalos are more spherical than the host halo, with minor to major and intermediate to major axis ratios of 0.68 and 0.83, respectively. Like isolated halos, subhalos tend to be less spherical in their central regions. The principal axis ratios are independent of subhalo mass, when the shapes are measured within a physical scale like r_Vmax, the radius of the peak of the circular velocity curve. Subhalos tend to be slightly more spherical closer to the host halo center. The spatial distribution of the subhalos traces the prolate shape of the host halo when they are selected by the largest V_max they ever had, i.e. before they experienced strong tidal mass loss. The subhalos' orientation is not random: the major axis tends to align with the direction towards the host halo center. This alignment disappears for halos beyond 3 r_200 and is more pronounced when the shapes are measured in the outer regions of the subhalos. The radial alignment is preserved during a subhalo's orbit and they become elongated during pericenter passage, indicating that the alignment is likely caused by the host halo's tidal forces. These tidal interactions with the host halo act to make subhalos rounder over time.
description: 12 pages, 11 figures, submitted to ApJ, v2: corrected typo in abstract ("[...] subhalos tend be less spherical in their central regions."), added a few references
Large-area $^{87}$Rb Bose-Einstein condensate in a clipped-Gaussian optical dipole trap
Creators: name: Lim, Younghoon
name: Goo, Junhong
name: Kwak, Haneul
name: Shin, Yong-il
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We demonstrate a production of large-area $^{87}$Rb Bose-Einstein condensates (BECs) using a non-Gaussian optical dipole trap (ODT). The ODT is formed by focusing a symmetrically truncated Gaussian laser beam and it is shown that the beam clipping causes the trap geometry elongated and flattened along the beam axis direction. In the clipped-Gaussian ODT, an elongated, highly oblate BEC of $^{87}$Rb is generated with length and width of approximately $470~μ\textrm{m}$ and $130~μ\textrm{m}$, respectively, where the condensate healing length is estimated to be $ξ\approx 0.25~μ\textrm{m}$ at the trap center. The ODT is characterized to have a quartic trapping potential along the beam axis and the atom density of the condensate is uniform within 10% over $1000ξ$ in the central region. Finally, we discuss the prospect of conducting vortex shedding experiments using the elongated condensate.
description: 6 pages, 6 figures
Systematics of String Loop Corrections in Type IIB Calabi-Yau Flux Compactifications
Creators: name: Cicoli, Michele
name: Conlon, Joseph P.
name: Quevedo, Fernando
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the behaviour of the string loop corrections to the N=1 4D supergravity Kaehler potential that occur in flux compactifications of IIB string theory on general Calabi-Yau three-folds. We give a low energy interpretation for the conjecture of Berg, Haack and Pajer for the form of the loop corrections to the Kaehler potential. We check the consistency of this interpretation in several examples. We show that for arbitrary Calabi-Yaus, the leading contribution of these corrections to the scalar potential is always vanishing, giving an "extended no-scale structure". This result holds as long as the corrections are homogeneous functions of degree -2 in the 2-cycle volumes. We use the Coleman-Weinberg potential to motivate this cancellation from the viewpoint of low-energy field theory. Finally we give a simple formula for the 1-loop correction to the scalar potential in terms of the tree-level Kaehler metric and the correction to the Kaehler potential. We illustrate our ideas with several examples. A companion paper will use these results in the study of Kaehler moduli stabilisation.
description: 34 pages and 3 figures; typos corrected and references added
title: Soft Law in EU Electronic Communications Regulation: A Bulgarian Case Study
Creators: name: Sulev, Georgi
Publisher: name: European Papers (www.europeanpapers.eu)
Year: 2021
Subjects: subject: soft law
subject: electronic communications
subject: regulation
subject: EU regulatory framework for electronic communications networks and services
subject: legal effects of non-binding acts
subject: Bulgarian administrative law

description: European Papers - A Journal on Law and Integration, 2020 5(3), 1555-1564
description: European Forum Insight of 16 January 2021
description: I. Introducing soft law in the EU regulatory framework for electronic communications networks and services. - II. Legal and practical effects of soft law in EU electronic communications regulation. - III. EU electronic communications soft law in the decisions of the Communications Regulation Commission and the case-law of the administrative courts of Bulgaria. - IV. Final remarks.
description: Soft law adopted by the European Commission is an integral part of the EU regulatory framework for electronic communications networks and services, and has always played an important role in the regulatory process. In economic regulation under the framework, the use of binding legislation is limited to prescribing general regulatory powers and applicable procedures. The regulatory framework allows broad discretion in its application by national regulatory authorities constrained by their duty to take into utmost account soft law adopted by the Commission. The discussion in this Insight relates to the legal, practical and psychological effects of soft law, taking into account the institutional setting and the role of the various actors involved - the Commission, national regulatory authorities, European and national courts, exemplified by a case study of the regulatory practice of the Bulgarian regulator and the case-law of Bulgarian administrative courts.
Method for Semi-Automated Improvement of Smart Factories Using Synthetic Data and Cause-Effect-Relationships
Creators: name: Hummel, Vera
name: Schuhmacher, Jan
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Smart factories
subject: synthetic data
subject: semi-automated improvement
subject: self-organization
subject: data-driven decision-making
subject: cause-and-effect relationships
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Smart factories, driven by the integration of automation and digital technologies, have revolutionized industrial production by enhancing efficiency, productivity, and flexibility. However, the optimization and continuous improvement of these complex systems present numerous challenges, especially when real-world data collection is time-consuming, expensive, or limited. In this paper, we propose a novel method for semi-automated improvement of smart factories using synthetic data and cause-effect-relations, while incorporating the aspect of self-organization. The method leverages the power of synthetic data generation techniques to create representative datasets that mimic the behaviour of real-world manufacturing systems. These synthetic datasets serve together with the cause-and-effect relationships as a valuable resource for factory optimization, as they enable extensive experimentation and analysis without the constraints of limited or costly real-world data. Furthermore, the method embraces the concept of self-organization within smart factories. By allowing the system to adapt and optimize itself based on feedback from the synthetic data, cause-effect-relationships, the factory can dynamically reconfigure and adjust its processes. To facilitate the improvement process, the method integrates the synthetic data with advanced analytics and machine learning algorithms as well as and the cause-and-effect relationships. This synergy between human expertise and technological advancements represents a compelling path towards a truly optimized smart factory of the future.
The impact of transverse Slavnov-Taylor identities on dynamical chiral symmetry breaking
Creators: name: Albino, Luis
name: Bashir, Adnan
name: El-Bennich, Bruno
name: Rojas, Eduardo
name: Serna, Fernando E.
name: da Silveira, Roberto Correa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We extend earlier studies of transverse Ward-Fradkin-Green-Takahashi identities in QED, their usefulness to constrain the transverse fermion-boson vertex and their importance for multiplicative renormalizability, to the equivalent gauge identities in QCD. To this end, we consider transverse Slavnov-Taylor identities that constrain the transverse quark-gluon vertex and derive its eight associated scalar form factors. The complete vertex can be expressed in terms of the quark's mass and wave-renormalization functions, the ghost-dressing function, the quark-ghost scattering amplitude and a set of eight form factors. The latter parametrize the hitherto unknown nonlocal tensor structure in the transverse Slavnov-Taylor identity which arises from the Fourier transform of a four-point function involving a Wilson line in coordinate space. We determine the functional form of these eight form factors with the constraints provided by the Bashir-Bermudez vertex and study the effects of this novel vertex on the quark in the Dyson-Schwinger equation using lattice QCD input for the gluon and ghost propagators. We observe significant dynamical chiral symmetry breaking and a mass gap that leads to a constituent mass of the order of 500 MeV for the light quarks. The flavor dependence of the mass and wave-renormalization functions as well as their analytic behavior on the complex momentum plane is studied and as an application we calculate the quark condensate and the pion's weak decay constant in the chiral limit. Both are in very good agreement with their reference values.
description: Published version in JHEP which includes the chiral limit case in figure 6, typos corrected, improved discussion about transverse form factor ($\tau_4$ and $\tau_7$) contributions on pages 21-22; 36 pages, 8 figures, 1 table
Violation of action--reaction and self-forces induced by nonequilibrium fluctuations
Creators: name: Buenzli, P. R.
name: Soto, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that the extension of Casimir-like forces to fluctuating fluids driven out of equilibrium can exhibit two interrelated phenomena forbidden at equilibrium: self-forces can be induced on single asymmetric objects and the action--reaction principle between two objects can be violated. These effects originate in asymmetric restrictions imposed by the objects' boundaries on the fluid's fluctuations. They are not ruled out by the second law of thermodynamics since the fluid is in a nonequilibrium state. Considering a simple reaction--diffusion model for the fluid, we explicitly calculate the self-force induced on a deformed circle. We also show that the action--reaction principle does not apply for the internal Casimir forces exerting between a circle and a plate. Their sum, instead of vanishing, provides the self-force on the circle-plate assembly.
description: 4 pages, 1 figure. V2: New title; Abstract partially rewritten; Largely enhanced introductory and concluding remarks (incl. new Refs.)
Modelling The Influence Of Production Planning And Production Scheduling On Business Performance In The Manufacturing Industry Of South Africa
Creators: name: Chinomona, Elizabeth
name: Kgaogelo Mogano, Mamonare Minky
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Production planning
subject: Production scheduling
subject: Business performance
subject: Manufacturing industry
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: It is apparent that for manufacturing companies to succeed, it is crucial to consider the factors that will contribute positively to the performance of the business. The issues related to production planning and production scheduling on business performance have been neglected. Product planning and production scheduling be adopted as factors manufacturing companies could consider to improve their business performance. There has been little research done to prove that production planning and production scheduling can lead to improving the overall business performance of the manufacturing industry. Therefore, this study seeks to fill this lacuna by investigating the influence of production planning and production scheduling on business performance in manufacturing industries. A quantitative approach was adopted for this study, and a questionnaire was distributed physically and electronically. Three hundred and six (306) respondents participated in the study. Data obtained were analysed using SPSS 28.0 and AMOS 28.0. The results of the study proved that production planning and production scheduling have a positive impact on business performance. Production planning and scheduling have proved to deliver a competitive advantage and improved customer satisfaction in the manufacturing industry.
Nanoscale ferromagnetism in non-magnetic doped semiconductors
Creators: name: Nielsen, Erik
name: Bhatt, R. N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: While ferromagnetism at relatively high temperatures is seen in diluted magnetic semiconductors such as Ga_(1-x)Mn_(x)As, doped semiconductors without magnetic ions have not shown evidence for ferromagnetism. Using a generalized disordered Hubbard model designed to characterize hydrogenic centers in semiconductors, we find that such systems may also exhibit a ferromagnetic ground state, at least on the nanoscale. This is found most clearly in a regime inaccessible to bulk systems, but attainable in quantum dots as well as heterostructures. We present numerical results demonstrating the occurrence of high spin ground states in both lattice and positionally disordered systems. We examine how the magnetic phases are affected by characteristics of real doped semiconductors, such as positional disorder and electron-hole asymmetry.
description: 4 pages, 5 figures
Point estimation with exponentially tilted empirical likelihood
Creators: name: Schennach, Susanne M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: 62F10 (Primary); 62F12 (Secondary)

description: Parameters defined via general estimating equations (GEE) can be estimated by maximizing the empirical likelihood (EL). Newey and Smith [Econometrica 72 (2004) 219--255] have recently shown that this EL estimator exhibits desirable higher-order asymptotic properties, namely, that its $O(n^{-1})$ bias is small and that bias-corrected EL is higher-order efficient. Although EL possesses these properties when the model is correctly specified, this paper shows that, in the presence of model misspecification, EL may cease to be root n convergent when the functions defining the moment conditions are unbounded (even when their expectations are bounded). In contrast, the related exponential tilting (ET) estimator avoids this problem. This paper shows that the ET and EL estimators can be naturally combined to yield an estimator called exponentially tilted empirical likelihood (ETEL) exhibiting the same $O(n^{-1})$ bias and the same $O(n^{-2})$ variance as EL, while maintaining root n convergence under model misspecification.
description: Published at http://dx.doi.org/10.1214/009053606000001208 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
From Complexity To Clarity In Sustainable Factory Planning: A Conceptual Approach For Data-driven Integration Of Green Factory KPIs In Manufacturing Site Selection
Creators: name: Riesener, Michael
name: Adlon, Tobias
name: Schukat, Esben
name: Salzwedel, Jan
name: Engeln, Carsten
name: Passlick, Felix
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Factory Planning
subject: Site Selection
subject: Sustainability
subject: Digitalization
subject: Green Factory
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The selection of manufacturing facility locations entails high costs and long-term consequences. This necessitates an objective approach to mitigate uncertainties associated with subjective decision-making. Our paper builds upon previous research on data-driven location selection and conceptually extends it to integrate sustainability potential evaluation. By combining Green Factory Key Performance Indicators (KPIs), the authors aim to facilitate and standardize long-term decision-making in sustainable factory planning. After outlining the requirements, current state of the art, and limitations of location selection, we emphasize the need for integrating region-specific Green Factory KPIs with new data sources for site selection. Therefore, we propose a methodology involving a review of scientific literature and other sources to identify data sources for site selection, establishing research criteria for determining data suitability. The results include suitable subsets for location selection and future steps such as criteria application and target data determination. This paper contributes to paving the way for implementing sustainability-driven location selection strategies in factory planning. In conclusion, we outline a roadmap for further development and suggest two areas for future research: data collection and integration, as well as developing and validating a location selection app.
Dzyaloshinsky-Moriya Anisotropy in the Spin-1/2 Kagomé Compound ZnCu$_{3}$(OH)$_{6}$Cl$_{2}$
Creators: name: Zorko, A.
name: Nellutla, S.
name: van Tol, J.
name: Brunel, L. C.
name: Bert, F.
name: Duc, F.
name: Trombe, J. C.
name: de Vries, M. A.
name: Harrison, A.
name: Mendels, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the determination of the Dzyaloshinsky-Moriya interaction, the dominant magnetic anisotropy term in the \kagome spin-1/2 compound {\herbert}. Based on the analysis of the high-temperature electron spin resonance (ESR) spectra, we find its main component $|D_z|=15(1)$ K to be perpendicular to the \kagome planes. Through the temperature dependent ESR line-width we observe a building up of nearest-neighbor spin-spin correlations below $\sim$150 K.
description: 4 pages, 3 figures, minor modifications
Stellar population gradients in early-type cluster galaxies with VIMOS IFU
Creators: name: Rawle, T. D.
name: Smith, Russell J.
name: Lucey, J. R.
name: Swinbank, A. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from a pilot study of radial stellar population trends in early-type galaxies using the VLT VIMOS integral field unit (IFU). We observe twelve galaxies in the cluster Abell 3389 (z~0.027). For each galaxy, we measure 22 line-strength indices in multiple radial bins out to at least the effective radius. We derive stellar population parameters using a grid inversion technique, and calculate the radial gradients in age, metallcity and alpha-abundance. Generally, the galaxies in our sample have flat radial trends in age and [alpha/Fe], but negative gradients in [Z/H] (-0.20 +/- 0.05 dex). Combining our targets with two similar, long-slit studies to increase sample size, we find that the gradients are not correlated with the central velocity dispersion or K-band luminosity (both proxies for galaxy mass). However, we find that the age and metallicity gradients are both anti-correlated with their respective central values (to > 4 sigma), such that galaxies with young cores have steeper positive age gradients, and those with metal-rich centres have strong negative [Z/H] gradients.
description: 14 pages, 15 figures. Accepted by MNRAS
Distances to Populous Clusters in the LMC via the K-Band Luminosity of the Red Clump
Creators: name: Grocholski, A. J.
name: Sarajedini, A.
name: Olsen, K. A. G.
name: Tiede, G. P.
name: Mancone, C. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from a study of the distances and distribution of a sample of intermediate-age clusters in the Large Magellanic Cloud. Using deep near-infrared photometry obtained with ISPI on the CTIO 4m, we have measured the apparent K-band magnitude of the core helium burning red clump stars in 17 LMC clusters. We combine cluster ages and metallicities with the work of Grocholski & Sarajedini to predict each cluster's absolute K-band red clump magnitude, and thereby calculate absolute cluster distances. An analysis of these data shows that the cluster distribution is in good agreement with the thick, inclined disk geometry of the LMC, as defined by its field stars. We also find that the old globular clusters follow the same distribution, suggesting that the LMC's disk formed at about the same time as the globular clusters, ~ 13 Gyr ago. Finally, we have used our cluster distances in conjunction with the disk geometry to calculate the distance to the LMC center, for which we find (m-M)o = 18.40 +/- 0.04_{ran} +/- 0.08_{sys}, or Do = 47.9 +/- 0.9 +/- 1.8 kpc.
description: 31 pages including 5 figures and 7 tables. Accepted for publication in the August 2007 issue of AJ
Trophic phasing of juvenile chum salmon (Oncorhynchus keta Walbaum) and harpacticoid copepods in the Fraser River Estuary, British Columbia
Creators: name: D'Amours, Denis
Publisher: name: University of British Columbia
Year: 2010

description: Within the environmental approach for the study of fluctuations in fish population abundance, factors that may regulate the overlap in time and space (phasing) of fishes, food supply, and predators, are sought. This trophic phasing analysis is based on the recognition that production of food is a process at least partially independent of the production of consumers. Trophic phasing analysis was applied in investigating production of chum salmon in the Fraser River estuary. Juvenile chum salmon were captured near a tidal flat; the abundance of salmon near the flat was highest in late May in 1985 and in early June in 1986. These salmon relied heavily on harpacticoid copepods as a food source. Individual taxa as well as the assemblage of main prey harpacticoids also had periods of highest abundance in the water column. The blooming period of the prey harpacticoid assemblage coincided with the appearance in the sediment of warming episodes. These warming episodes result from interactions between the daily heat cycle and specific tide patterns. Variations in the degree of overlap of the periods of highest abundance of salmon and harpacticoids could affect the survival of the fishes. The degree of overlap of those periods was hindcasted using indices for the temporal patterns of abundance of salmon and harpacticoids on the flat. The median date of downstream migration at a counting station upstream was used for the salmon; the timing of the second annual occurrence of tide conditions giving rise to a warming event in the sediment was used for harpacticoids. Difference in time between the two events was taken as a phasing index accounting for two degrees of freedom in the process of fish production. There is suggestion of a non-monotonic relationship between the index of survival of even broodyear chum salmon and the hindcasted phasing index.
Hydrodynamic Simulation of a nano-flare heated multi-strand solar atmospheric loop
Creators: name: Sarkar, Aveek
name: Walsh, Robert W
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is a growing body of evidence that the plasma loops seen with current instrumentation (SOHO, TRACE and Hinode) may consist of many sub-resolution elements or strands. Thus, the overall plasma evolution we observe in these features could be the cumulative result of numerous individual strands undergoing sporadic heating. This paper presents a short (10^9 cm ~ 10 Mm) ``global loop'' as 125 individual strands where each strand is modelled independently by a one-dimensional hydrodynamic simulation. The energy release mechanism across the strands consists of localised, discrete heating events (nano-flares). The strands are ``coupled'' together through the frequency distribution of the total energy input to the loop which follows a power law distribution with index alpha. The location and lifetime of each energy event occurring is random. Although a typical strand can go through a series of well-defined heating/cooling cycles, when the strands are combined, the overall quasi-static emission measure weighted thermal profile for the global loop reproduces a hot apex/cool base structure. Localised cool plasma blobs are seen to travel along individual strands which could cause the loop to `disappear' from coronal emission and appear in transition or chromospheric ones. As alpha increases (from 0 to 2.29 to 3.29), more weight is given to the smallest heating episodes. Consequently, the overall global loop apex temperature increases while the variation of the temperature around that value decreases. Any further increase in alpha saturates the loop apex temperature variations at the current simulation resolution. The effect of increasing the number of strands and the loop length as well as the implications of these results upon possible future observing campaigns for TRACE and Hinode are discussed.
description: 23 pages, 10 Figures. ApJ (accepted)
Investigation of Deep Learning Datasets for Intralogistics
Creators: name: Holm, Dimitrij-Marian
name: Junge, Philipp
name: Rutinowski, Jérôme
name: Fottner, Johannes
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: synthetic Dataset
subject: Deep Learning
subject: Dataset
subject: Logistics
subject: logistics-dataset
subject: Object Detection
subject: Benchmark
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Deep Learning for Computer Vision has great potential in intralogistics, for example for applications such as mobile robots or autonomous forklifts. However, the availability of labelled image datasets within this area is limited. To address this problem, we benchmarked two different datasets, LOCO (Logistics Objects in Context) and the TOMIE framework (Tracking Of Multiple Industrial Entities), to figure out, if these datasets can be combined to a single one. Therefore, we examine the usability of these datasets for Object Detection tasks using the YOLOv7 framework. For this we trained several Networks and compared them with each other. A deep analysis between these two datasets shows that they are very different and only suitable for specific tasks which are not interchangeable, despite having the same domain. Deeper Investigations are done to find the reasons for this. To close the Gap between LOCO and TOMIE, a synthetic data generation pipeline for Pallets is developed and 18 000 images are rendered. Furthermore, models are trained based on the synthetic data and compared with the models trained on real data. The synthetic data generation pipeline successfully closes the reality gap, and the performance on TOMIE is increased, but the performance on LOCO is significantly weaker. To develop a deeper understanding of this behavior we examine the underlying datasets and the reasons for the performance difference are identified.
Reducing Customer Complaints in Air Conditioning Installation Services through Lean and MRP Tools: A Case Study
Creators: name: Aguilar-Cevallos, Silvana
name: Aguilar-Cevallos, Yersson
name: Quiroz-Flores, Juan Carlos
name: García-López, Yvan Jesus
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Customer complaint rate
subject: Lean Service
subject: 5S
subject: ABC classification;
subject: Standardized Work
subject: MRP
subject: air conditioning services
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: In Latin America, the business services sector is constantly searching for continuous improvement to improve the performance of service operations and service quality. However, merchandise availability must be guaranteed to prevent stockouts and preserve high customer satisfaction. Therefore, managing a warehouse inside a service organization is challenging. In this way, a model for improvement was created to address the issues raised above, combining Lean Service tools such as ABC, 5S, and standardization of work with a Material Requirements Plan (MRP) to reduce the claims rate, which is currently 60 percent owing to ineffective management of the tool ordering and installation processes. After implementing the pilot plan and the simulation in the Arena software, a significant variation in the claims rate was evidenced by reducing it to 30%. This study contributes to the validation of lean tools in the air conditioning service industry and will continue to contribute to future managers with similar processes.
“The Work Is Essential, but the Workers Are Not”: U.S. Grocery Store Workers’ Experiences on the “Front Lines” of the Covid-19 Pandemic
Creators: name: McSharry, Mary
Publisher: name: University of Chicago
Year: 2021

description: The term “essential worker,” which emerged near the beginning of the Covid-19 pandemic, seemed to indicate a moment of increased attention to work and a discursive recognition of its essentiality. However, this rhetorical change has not resulted in a substantive shift in contemporary value regimes in the U.S. that construct some jobs as unskilled labor deserving of minimum compensation—at least not in ways that have been felt by working people themselves at present. In this paper I explore the tension between the discourses that have circulated over the past year and a half, especially at the beginning of the pandemic, that portray essential workers as “heroic,” and the material reality that has in many ways remained the same or worsened for those working essential jobs, who continue to be undervalued and underpaid. My main arguments center around how people are divided into groups according to labor-based hierarchies and how these divisions are upheld and naturalized through ideology. I explore how popular understandings of the pandemic as an event, rather than a process, allows it to be conceptualized as exceptional, which in turn allows a return to normal to be portrayed as the ultimate societal goal. This constructs everything that preceded the pandemic, including already extant social inequities, as normal and desirable, obscuring structural analyses and limiting possibilities for the imagination of alternative conceptualizations. Drawing on discourse analysis, survey responses, and interviews with people working in grocery stores during the pandemic, I attempt to show processes of normalization as they occur. I see these processes that have occurred during the pandemic as a continuation of the ongoing process of normalization that allows workers’ exploitation to be regarded as commonplace, inevitable, and even deserved.
Enhanced Planning Of Production Plants: A Case-Based Reasoning Driven Approach
Creators: name: Syniawa, Daniel
name: Egel, Robert
name: Schachtsiek, Jan
name: Hypki, Alfred
name: Kuhlenkötter, Bernd
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Production plant planning
subject: Case-based reasoning
subject: Expert system
subject: AutomationML
subject: Knowledge management
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Advanced industrial developments lead to increasingly customized products and shortened product life cycles. In the context of production systems, this necessitates faster engineering of suitable production resources and layouts to cope with the increasing product variety. Current engineering processes rely mainly on adapting already realized solutions and leveraging past experiences to address new project challenges. However, the knowledge about efficient planning processes is often tied to individual employees. These experiences cannot be utilized consistently, particularly in employee departure or absence due to illness. To counteract this problem, companies attempt to digitize and store knowledge in various ways. Nevertheless, the company-wide and person-independent retrieval of crucial information is still difficult or impossible. Influencing factors are, among others, non-standardized information models and forms of description. In response to these challenges, this paper introduces an approach for the standardized modeling and crosscompany provision of experiences in production plant planning. Based on the paradigms of case-based reasoning and vendor-neutral data modeling using AutomationML, a system for selecting production resources and planning related layouts is demonstrated. By determining the similarity of new product structures, whose production facilities have yet to be engineered, with products whose production facilities are already realized, suitable existing solutions regarding production resources and their placement can be submitted explicitly to a planning expert. The approach is exemplified by a scenario of engineering an assembly system for electrolysis stacks. For this purpose, the similarity determination is performed using the Hamming similarity. Thus, it can be shown that case-based reasoning, which is already successfully used in other domains, has a significant potential to accelerate the subprocesses of production plant planning.
Hydrodynamic Collimation of Relativistic Outflows: Semianalytic Solutions and Application to Gamma-Ray Bursts
Creators: name: Bromberg, Omer
name: Levinson, Amir
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A model is developed for the confinement and collimation of a baryon poor outflow by its surrounding medium. Both, confinement by kinetic pressure of a static corona, and confinement by the ram pressure of a supersonic wind emanating from a disk surrounding the inner source are considered. Solutions are presented for the structure of the shocked layers of a deflected baryon poor jet (BPJ) and exterior wind. The dependence of the opening angle of the BPJ on the parameters of the confining medium are carefully examined. It is found that the BPJ shock may either converge to the symmetry axis or diverge away from it, depending on the opening angle of the BPJ injection cone. In the latter case the inner flow exhibits a non-uniform structure, consisting of an ultra-relativistic core containing the unshocked BPJ enveloped by the slower, shocked BPJ layer. The implications of our results to the prompt GRB emission are briefly discussed.
description: 22 pages, 7 figures. Added a section on the model limitation, and possible applications of this model in systems other then GRBs. Accepted by Apj
ИСПОЛЬЗОВАНИЕ 3Д ТЕХНОЛОГИЙ В СУДЕБНОЙ МЕДИЦИНЕ
Creators: name: Абдуллаева, Нина
Publisher: name: Zenodo
Year: 2024

description: В последние десятилетия 3D-технологии стали неотъемлемой частью многих областей медицинской информации, где важна точность, достоверность и анализ сложных медицинских данных. Обсуждаются использование 3D-технологий в судебной медицине, появление компьютерной томографии и других современных методов обработки изображений, преимущества и различные аспекты ее использования.
Conductance quantization and snake states in graphene magnetic waveguides
Creators: name: Ghosh, T. K.
name: De Martino, A.
name: Häusler, W.
name: Dell'Anna, L.
name: Egger, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider electron waveguides (quantum wires) in graphene created by suitable inhomogeneous magnetic fields. The properties of uni-directional snake states are discussed. For a certain magnetic field profile, two spatially separated counter-propagating snake states are formed, leading to conductance quantization insensitive to backscattering by impurities or irregularities of the magnetic field.
description: 5 pages, 4 figures, final version accepted as Rapid Comm. in PRB
Feedback-controlled microbubble generator producing one million monodisperse bubbles per second
Creators: name: van Elburg, Benjamin
name: Lara, Gonzalo Collado
name: Bruggert, Gert-Wim
name: Segers, Tim
name: Versluis, Michel
name: Lajoinie, Guillaume
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Applied Physics (physics.app-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Monodisperse lipid-coated microbubbles are a promising route to unlock the full potential of ultrasound contrast agents for medical diagnosis and therapy. Here, we present a stand-alone lab-on-a-chip instrument that allows microbubbles to be formed with high monodispersity at high production rates. Key to maintaining a long-term stable, controlled, and safe operation of the microfluidic device with full control over the output size distribution is an optical transmission based measurement technique that provides real-time information on production rate and bubble size. We feed the data into a feedback loop and demonstrate that this system can control the on-chip bubble radius (2.5 to 20 $μ$m) and the production rate up to $10^6$ bubbles/s. The freshly formed phospholipid-coated bubbles stabilize after their formation to a size approximately two times smaller than their initial on-chip bubble size without loss of monodispersity. The feedback control technique allows for full control over the size distribution of the agent and can aid the development of microfluidic platforms operated by non-specialist end users.
description: We've have added the supplementary information with the submission in the same format
BVRI Surface Photometry of Isolated Spiral Galaxies
Creators: name: Hernandez-Toledo, H.
name: Zendejas-Dominguez, J.
name: Avila-Reese, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A release of multicolor broad band (BVRI) photometry for a subsample of 44 isolated spirals drawn from the Catalogue of Isolated Galaxies (CIG) is presented. Total magnitudes and colors at various circular apertures, as well as some global structural/morphological parameters are estimated. Morphology is reevaluated through optical and sharp/filtered R band images, (B-I) color index maps, and archive near-IR JHK images from the Two-Micron Survey. The CAS structural parameters (Concentration, Asymmetry, and Clumpiness) were calculated from the images in each one of the bands. The fraction of galaxies with well identified optical/near-IR bars (SB) is 63%, while a 17% more shows evidence of weak or suspected bars (SAB). The sample average value of the maximum bar ellipticity is 0.4. Half of the galaxies in the sample shows rings. We identify two candidates for isolated galaxies with disturbed morphology. The structural CAS parameters change with the observed band, and the tendencies they follow with the morphological type and global color are more evident in the redder bands. In any band, the major difference between our isolated spirals and a sample of interacting spirals is revealed in the A-S plane. A deep and uniformly observed sample of isolated galaxies is intended for various purposes including (i) comparative studies of environmental effects, (ii) confronting model predictions of galaxy evolution and (iii) evaluating the change of galaxy properties with redshift.
description: 44 pages, 9 figures and 7 tables included. To appear in The Astronomical Journal. For the 43 appendix figures 4.1-4.43 see http://www.astroscu.unam.mx/~avila/Figs4.1_4.43.tar.gz (7.2 Mb tar.gz file)
Microphysical dissipation, turbulence and magnetic fields in hyper-accreting discs
Creators: name: Rossi, Elena M.
name: Armitage, Philip J.
name: Menou, Kristen
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Hyper-accreting discs occur in compact-object mergers and collapsars, and may power gamma-ray bursts (GRBs). We calculate the microscopic viscosity and resistivity of plasma in these discs, and discuss the implications for their global structure and evolution. In the neutrino-cooled innermost regions, the viscosity is provided mainly by mildly degenerate electrons, while the resistivity is modified from the Spitzer value due to the effects of both relativity and degeneracy. The plasma behaves as an almost ideal MHD fluid. Among the non-ideal MHD effects the Hall term is relatively the most important, while the magnetic Prandtl number, Pr (the ratio of viscosity to resistivity), is typically larger than unity: 10 < Pr < 6000. The outer radiatively inefficient regions also display high Pr. Numerical simulations of the magneto-rotational instability indicate that the saturation level and angular momentum transport efficiency may be greatly enhanced at high Pr. If this behaviour persists in the presence of a strong Hall effect we would expect that hyper-accreting discs should be strongly magnetised and highly variable. The expulsion of magnetic field that cannot be dissipated at small scales may also favour a magnetic outflow. We note the similaries between the Prandtl number in hyper-accreting discs and X-ray binary discs, which suggests that a comparison between late-time activity in GRBs and X-ray binary accretion states may be fruitful. Our results imply that the behavior of high Prandtl number MHD flows needs to be considered in studies of hyper-accreting discs.
description: 14 pages, 10 figures. MNRAS, accepted. Minor revisions. Comments added in discussion section
Nixonia corrugata Johnson & Masner 2006
Creators: name: van Noort, Simon
name: Johnson, Norman
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Scelionidae
Nixonia
Nixonia corrugata

description: Nixonia corrugata Johnson & Masner, 2006 Distribution map available at: http://hol.osu.edu/index.html?id=184918 1 male, South Africa, Northern Cape, Hantam National Botanical Garden, 787m, 31°24.845'S 19°09.443'E, 7–10 December 2007, S van Noort, Yellow pan trap, GL07- KOP1-Y02, Niewoudtville Dolerite Koppie Renosterveld, SAM-HYM-P025046, OSUC 256947 (SAMC). 1 female, 1 male, South Africa, Northern Cape, Hantam National Botanical Garden, 741m, 31°24.182'S 19°08.587'E, 10 Dec 2007 – 13 Jan 2008, S van Noort, Malaise trap, GL07-REN3-M03, Nieuwoudtville Shale Renosterveld, SAM-HYM-P025045, OSUC 256948, OSUC 256949 (SAMC); 1 female, 2 males, same data except for 13 Jan – 14 February 2008, GL07-REN3-M10, SAM- HYM-P025053, OSUC 256950, OSUC 256951, OSUC 256952 (SAMC); 1 male, same data except for 18 November – 25 Dec 2008, Yellow pan trap, GL07-REN3- Y18, SAM-HYM-P030247, OSUC 256953 (SAMC).
description: Published as part of van Noort, Simon & Johnson, Norman, 2009, New species of the plesiomorphic genus Nixonia Masner (Hymenoptera, Platygastroidea, Platygastridae) from South Africa, pp. 31-51 in ZooKeys 20 (20) on page 48, DOI: 10.3897/zookeys.20.112, http://zenodo.org/record/576506
description: {"references": ["Johnson NF, Masner L (2006) Revision of world species of the genus Nixonia Masner (Hymenoptera: Platygastroidea, Scelionidae). American Museum Novitates 3518: 1 - 32."]}
Jets in strongly-coupled N = 4 super Yang-Mills theory
Creators: name: Chesler, Paul M.
name: Jensen, Kristan
name: Karch, Andreas
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study jets of massless particles in N=4 super Yang-Mills using the AdS/CFT correspondence both at zero and finite temperature. We set up an initial state corresponding to a highly energetic quark/anti-quark pair and follow its time evolution into two jets. At finite temperature the jets stop after traveling a finite distance, whereas at zero temperature they travel and spread forever. We map out the corresponding baryon number charge density and identify the generic late time behavior of the jets as well as features that depend crucially on the initial conditions.
description: 21 pages, 12 figures. Added discussion regarding string profiles in more than one spatial dimension. Refs added
Acetolactate Synthase Gene Mutation Conferring lmazapyr-Resistant Sugarcane Cell Line
Creators: name: Nisachol  Khruangchan
Publisher: name: Department of Agriculture
Year: 2009
Subjects: acetolactate synthase (ALS)
imazapyr-resistant sugarcane cell ling
less sensitivity
point mutation
sugarcane

description: Thai Agricultural Research Journal, 27, 1, 82-97
A petrologic study of basalts from the Magic Mountain hydorthermal area, Southern Explorer Ridge, northeast Pacific Ocean
Creators: name: Shea, Gregory Thomas Francis
Publisher: name: University of British Columbia
Year: 2012

description: The Magic Mountain Hydrothermal Area (MMA) is a 5 km portion of the Southern Explorer Ridge (SER) centered at 49°46' and 130°20'W. It is a region of active hydrothermal activity located near the culmination of an unusually high standing spreading centre. Seafloor photographs, conductivity-temperature surveys and acoustic images have been used to determine the nature and extent of axial volcanism and tectonism as well as the associated hydrothermal activity. Major element and trace element whole rock analyses were obtained by x-ray flourescence spectrometry (XRF) for 25 recently formed basalts collected by submersible from the MMA. These were compared with analyses of basalts dredged from other locations on the ridge axis. The mineral phases of selected samples were analysed by electron microprobe. Basalt chemical variations observed along axis reveal that some of the MMA samples are the most highly fractionated and incompatible-element-enriched basalts so far obtained from the SER. These trends, along with variations in ridge morphology and lava flow type, indicate that the volcanism of the MMA is affected by a hot spot centred at the axial topographic high five km to the north. This hot spot may be associated with the propagation of the ridge segment. Several quantitative tests of fractional crystallization indicate that the 25 MMA basalts represent at least 13 discrete lavas derived from at least 5 distinct source magmas. Mixing between magmas is indicated by disequilibrium mineral textures and compositions observed in some samples. A relationship between hot spot activity and degree of magmatism with the location and duration of axial hydrothermal activity on spreading centres is indicated by these findings. Further investigation of these relationships as well as the relationship between the tectonic processes of ridge propagation and hot spot activity is recommended.