cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Bertrand competition with intertemporal demand
Creators: name: Dutta, Prajit Kumar
name: Matros, Alexander
name: Weibull, Jorgen W.
Publisher: name: Columbia University
Year: 2002
Subjects: Economics

description: In the text-book model of dynamic Bertrand competition, competing firms meet the same demand function every period. This is not a satisfactory model of the demand side if consumers can make intertemporal substitution between periods. Each period then leaves some residual demand to future periods, and consumers who observe price under-cutting may correctly anticipate an ensuing price war and therefore postpone their purchases. Such intertemporal substitution affects the profit to a deviating firm. Accordingly, the interaction between the firms no longer constitutes a repeated game, and hence falls outside the domain of the usual Folk theorems. We analyze collusive pricing in such situations, and study cases when consumers have perfect and imperfect foresight, and when they are more or less patient than the firms. It turns out that collusion against patient and forwardlooking consumers is easier to sustain than collusion in the text-book model.
RDA TIGER D1.2: Data Management Plan
Creators: name: Asmi, Ari
Publisher: name: Zenodo
Year: 2023
Subjects: EOSC
RDA

description: This deliverable lists the types of the data produced in the RDA TIGER project via the RDA TIGER personnel. The data storage and management solutions, and their role in the data lifetime are discussed. The DMP also includes information on the project and partner allocation of resources, data security, ethics and exploitation.
The ALMA Program Management Group and the ALMA Data Acquisition Process
Creators: name: Cortes, Juan Rodrigo
Publisher: name: Zenodo
Year: 2023

description: The ALMA Program Management Group (PMG) is responsible for the day-to-day management of observation execution, tracking of the
status of ALMA programs, data quality control, and coordination of these activities with staff at the three ALMA Regional Centers (ARCs). It
consists of a Program Manager and eight Data Analyst, with the support of about thirty Astronomer on Duties (AoD) to carry out the ALMA
observation executions, in service mode, at the ALMA Control rooms at the Operations Support Facility (OSF) and Santiago Central Offices
(SCO). Here, we present the mission, core operational tasks, deliverables, and activities of the ALMA Program Management Group, as well
as, a description of the entire ALMA Data Acquisition Process, and its last cycles performance based in the ALMA Key Performance
Indicators (KPI).
Electronic and Magnetic Structure of Possible Iron Based Superconductor BaFe2Se3
Creators: name: Medvedev, M. V.
name: Nekrasov, I. A.
name: Sadovskii, M. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present results of LDA calculations (band structure, densities of states, Fermi surfaces) for possible iron based superconductor BaFe2Se3 (Ba123) in normal (paramagnetic) phase. Results are briefly compared with similar data on prototype BaFe2As2 and (K,Cs)Fe2Se2 superconductors. Without doping this system is antiferromagnetic with T_N^{exp}~250K and rather complicated magnetic structure. Neutron diffraction experiments indicated the possibility of two possible spin structures (antiferromagnetically ordered "plaquettes" or "zigzags"), indistinguishable by neutron scattering. Using LSDA calculated exchange parameters we estimate Neel temperatures for both spin structures within the molecular field approximation and show τ_1 ("plaquettes") spin configuration to be more favorable than τ_2 ("zigzags").
description: 5 pages, 4 figures
Combustion of microalgae Nannochloropsis oculata biomass: cellular macromolecular and mineralogical content changes during thermal decomposition
Creators: name: Sukarni Sukarni
name: Uun Yanuhar
name: I. N. G. Wardana
name: Sudjito Sudjito
name: Nurkholis Hamidi
name: Widya Wijayanti
name: Wibisono, Yusuf
name: Sumarli Sumarli
name: I. M. Nauri
name: Heru Suryanto
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2018
Subjects: combustion
microalgae
Nannochloropsis oculata
cellular macromolecular
mineralogical content

description: Songklanakarin Journal of Science and Technology, 40, 6, 1456-1463
Values, culture, social capital, change : the case of The Car Coop
Creators: name: Osborn, Jeremy
Publisher: name: University of British Columbia
Year: 2011

description: This is a study of the oppositional social forces at play within and around the hybrid commercial social enterprise. The literature reveals these tension points regularly in the history of the social enterprise movement as a whole, and within individual organizations within the movement. Typically, these tension points, quasi-paradoxes, or oppositional co-existences are cultural and values-based in nature, stemming largely from a core egalitarian-utilitarian synthesis that is emerging globally in many forms, including via social enterprise. Consequently, the theoretical frameworks used to explore these questions are also socio-cultural, economic, and values-based. In the early years of the coop, the social entrepreneur is the key mediating force between the entrepreneurial, market-building demands of a new business, and the egalitarian institutional cultural predisposition that led to its creation. Later in the institutional history the social entrepreneur’s prolonged success at market development catalyzes a wider stakeholder debate and cultural crisis regarding the future of the institution under conditions of rapid and persistent growth. The organization’s members, arguably the most important stakeholder, are explored last - as a separate unit of analysis, but through a similar values-culture tension lens. It is found that the organization's members hold a complex, often paradoxical mix of utilitarian and egalitarian values, and that both are important to the organization's value proposition. The study is a qualitative inductive ethnography undertaken in the format of a single paradigmatic case study.
Cavity QED with atomic mirrors
Creators: name: Chang, D. E.
name: Jiang, L.
name: Gorshkov, A. V.
name: Kimble, H. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A promising approach to merge atomic systems with scalable photonics has emerged recently, which consists of trapping cold atoms near tapered nanofibers. Here, we describe a novel technique to achieve strong, coherent coupling between a single atom and photon in such a system. Our approach makes use of collective enhancement effects, which allow a lattice of atoms to form a high-finesse cavity within the fiber. We show that a specially designated "impurity" atom within the cavity can experience strongly enhanced interactions with single photons in the fiber. Under realistic conditions, a "strong coupling" regime can be reached, wherein it becomes feasible to observe vacuum Rabi oscillations between the excited impurity atom and a single cavity quantum. This technique can form the basis for a scalable quantum information network using atom-nanofiber systems.
description: 20 pages, 4 figures
Dendrocoris guatemalensis Thomas & H. Brailovsky 1999, new species
Creators: name: Thomas, D. B. Jr.
name: H. Brailovsky
Publisher: name: Zenodo
Year: 1999
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pentatomidae
Dendrocoris
Dendrocoris guatemalensis

description: Dendrocoris guatemalensis, new species
(Figures 4, 13, 15)
Description. Reddish-yellow with dense, dark punctation on dorsum,thoracic pleura and abdominal venter laterally. Cicatrices concolorous with pronotal disk.Antennae dull red; legs immaculate. Length of body from jugal apices to abdominal terminus, 6.3 mm; width across humeral angles, 3.7 mm.
Head.Vertex convex, tumid. Juga contiguous before tylus or nearly so. Head length from imaginary line connecting ocelli to apex of tylus about equal to width of head across anteocular angles. Antennal segment V longest, I11 slightly longer than IV, I shortest.Rostrum in repose just reaches metacoxae. Length of head from jugal apices to imaginary line connecting ocelli, 1.2 mm; head width across anteocular apices, 1.2 mm.
Thorax. Anterolateral pronotal margins thin, dorso-ventrally compressed; weakly sinuate in dorsal view. Humeri not prominent. Pronotal length at midline, 1.4 mm. Length of scutellum, 2.5 mm.
Abdomen. Basal tubercle small in female, obsolescent in male. Connexiva with obscure darkening along margins at angles.
Genitalia. Male pygophore without teeth on posterior aspect attending medial emargination. Each lateral flange of dorso-posterior margin with a distinct notch (Fig. 4). Paramere simple, digitoid, bent (Fig. 13).Female withvery small basal plates (first gonocoxites). Ninth paratergites terminate far from margin of eighth paratergites, which lack spiracles (Fig. 15).
Types. Holotype: male [UNAM]. Labeled: (a) GUATEMALA, 5 mi. SW. Huehuetenango. 7500' VII-29-1974. O'Briens & Marshall. (b) Dendrocoris nr. pini, Det. L. H. Rolston. Allotype: female [UNAM], labeled: MEXICO: Chiapas, 1 km S. Ocosingo, 18 Oct 1988, R. Turnbow. Paratypes: one male [DBTC], with same label data as allotype. One male [DBT],labeled: MEXICO: Chiapas, Lagos de Montebello, 23 October 1990, Hovore & Reifschneider. One female [DAR], labeled: Guelato, Oax. Mex. 18.VIII. 69 L.A. Kelton.
Etymology. the specific epithet reflects that the type locality is in the Republic of Guatemala.
Remarks. All of the collection localities cited are high elevation forests dominated by pine.
description: Published as part of Thomas, D. B. Jr. & H. Brailovsky, 1999, Review of the genus Dendrocoris Bergroth with descriptions of new species (Pentatomidae: Heteroptera), pp. 1-9 in Insecta Mundi 13 on pages 4-5
Visualizing electron pockets in cuprate superconductors
Creators: name: Das, Tanmoy
name: Markiewicz, R. S.
name: Bansil, A.
name: Balatsky, A. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Fingerprint of the electron-pocket in cuprates has been obtained only in numerous magneto-transport measurements, but its absence in spectroscopic observations pose a long-standing mystery. We develop a theoretical tool to provide ways to detect electron-pockets via numerous spectroscopies including scanning tunneling microscopy (STM) spectra, inelastic neutron scattering (INS), and angle-resolved photoemission spectroscopy (ARPES). We show that the quasiparticle-interference (QPI) pattern, measured by STM, shows additional 7 ${\bm q}$ vectors associated with the scattering on the electron-pocket, than that on the hole-pocket. Furthermore, the Bogolyubov quasiparticle scatterings of the electron pocket may lead to a second magnetic resonance mode in the INS spectra at a higher resonance energy. Finally, we reanalyze some STM, INS, and ARPES experimental data of several cuprate compounds which dictates the direct fingerprints of electron pockets in these systems.
description: 10 pages, 6 figures, submitted
D1.1 Guidelines for Support Management
Creators: name: Asmi, Ari
Publisher: name: Zenodo
Year: 2023
Subjects: Research Data Alliance
3rd party grants

description: These guidelines consist the main aspects of providing additional direct support for the RDA TIGER supported RDA working groups, such as procedures on providing and resourcing support actions, such as subcontracted services (consultancy), 3rd party support, or adoption grants.
description: Version not accepted by the Commission at the time of submission to Zenodo.
MPEC 2025-F194 : 2025 FU11
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2025 FU11

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Propensity Score Matching Methods for Non-Experimental Casual Studies
Creators: name: Dehejia, Rajeev H.
name: Wahba, Sadek
Publisher: name: Columbia University
Year: 1998
Subjects: Economics

description: This paper considers casual inference and sample selection bias in non-experimental settings in which: (i) few unites in the non-experimental comparison group are comparable to treatment units; and (ii) selecting a subset of comparison units similar to the treatment units is difficult because units must be compared across a high-dimensional set of pre-treatment characteristics. We propose the use of propensity score matching methods, and implement them using data from the NSW experiment. Following Lalonde (1986), we pair the experimental treated units with non-experimental comparison units from the CPS and PSID, and compare the estimates of the treatment effect obtained using out methods to the benchmark results from the experiment. We show that the methods succeed in focusing attention on the small subset of the comparison units comparable to the treated units and, hence, in alleviating the bias due to systematic differences between the treated and comparison units.
Effect of Wet Castor Leaf Feeding and Feeding Frequencies on Economic Traits of Eri-Silkworm, Samia cynthia ricini Boisduval (Saturnidae: Lepidoptera)
Creators: name: Ibrahim, Ahmed
name: Terefe, Metasebia
name: Shifa, Kedir
name: Tilahun, Abiy
Publisher: name: Journal of Science and Sustainable Development
Year: 2015

description: This study was carried out at Melkassa Agricultural Research Center in the sericulture and apiculture research laboratory during 2012 and 2013G.C. cropping seasons. Both tender and matured castor leafs were obtained from Melkassa Agricultural Research Center, sericulture research field to investigate the effects on castor feeding silkworms. The treatments consist of young and late age rearing of silkworm. During young age (1st and 2nd instars) rearing, the tender leaf and late age (3rd, 4th and 5th instars) rearing, matured castor leaf were dipped in the water and excess water was drained out by shaking and fed to the silkworms as per the treatments. Feeding the 1st and 2nd instars silkworms (young age) with daily once (8 am), twice (8 am and 8 pm) and thrice (8 am, 2 pm and 9 pm) with tender wet leaf. While at late age (3rd, 4th and 5th instars) the silkworms were fed with daily twice (8 am & 8pm), thrice (8am, 2pm and 8 pm) and four times (8am, 12 noon 4 pm and 9 pm) with matured castor leaf. The control batch silkworms were reared as per the standard rearing practices. The experiment was laid out in a randomized block design in three replications with a disease free laying per replication. Rearing of castor feeding silkworm by giving tender wet leaf daily twice at young age (1st and 2nd instars)) and matured wet castor plant leaf daily thrice for late age (3rd, 4th and 5th instars) silkworm significantly reduced the larval duration and diseases incidences and improved all the larval, cocoon and silk traits as compared to other feeding frequencies. While, the recommended normal three times/day castor leaf feeding at young age (1st and 2nd instars) and normal three times/day castor leaf feeding at late age was inferior in larval, cocoon and silk traits.
description: Journal of Science and Sustainable Development, Vol. 3 No. 2 (2015)
Estimators and inference in a censored regression model with endogenous covariates
Creators: name: Das, Mitali
Publisher: name: Columbia University
Year: 2002
Subjects: Economics

description: This paper derives the asymptotic distribution theory for censored regression models with endogenous covariates under no parametric assumptions on the disturbance distribution, extending the modeling framework of Powell (1986). While it is well known that under some restrictions the use of reduced form residuals will lead to consistent estimators of the structural parameters, derivation of the asymptotic distribution theory that is essential for inference and the usual hypothesis testing is not obvious for this model. The problem arises because the structural model generates a set of moment restrictions that are discontinuous in the parameters, making standard methods inapplicable. This paper illustrates that the techniques in Pakes and Pollard (1989) can be adapted to this model by treating the multi-stage problem as simultaneously satisfying the joint vector of population moment restrictions, and partitioning the joint asymptotic covariance matrix appropriately. A Monte Carlo study illustrates the high practical power of the estimators, and shows that they will provide a useful alternative to methods that depend on Gaussian or other specified distributions.
Numerical methods for finding multiplicative inverses of a modulo N
Creators: name: Bencharat Prempreesuk
name: Prapanpong Pongsriiam
name: Nairat Kanyamee
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2018
Subjects: modular multiplicative inverse
Newton's method
secant method
binary representation
Zeckendorf representation

description: Songklanakarin Journal of Science and Technology, 40, 6, 1361-1367
Identification and selection rules of the spin-wave eigen-modes in a normally magnetized nano-pillar
Creators: name: Naletov, Vladimir V.
name: De Loubens, Grégoire
name: Albuquerque, Gonçalo
name: Borlenghi, Simone
name: Cros, Vincent
name: Faini, Giancarlo
name: Grollier, Julie
name: Hurdequint, Hervé
name: Locatelli, Nicolas
name: Pigeau, Benjamin
name: Slavin, Andrei N.
name: Tiberkevich, Vasyl S.
name: Ulysse, Christian
name: Thierry, Valet
name: Olivier, Klein
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on a spectroscopic study of the spin-wave eigen-modes inside an individual normally magnetized two layers circular nano-pillar (Permalloy$|$Copper$|$Permalloy) by means of a Magnetic Resonance Force Microscope (MRFM). We demonstrate that the observed spin-wave spectrum critically depends on the method of excitation. While the spatially uniform radio-frequency (RF) magnetic field excites only the axially symmetric modes having azimuthal index $\ell=0$, the RF current flowing through the nano-pillar, creating a circular RF Oersted field, excites only the modes having azimuthal index $\ell=+1$. Breaking the axial symmetry of the nano-pillar, either by tilting the bias magnetic field or by making the pillar shape elliptical, mixes different $\ell$-index symmetries, which can be excited simultaneously by the RF current. Experimental spectra are compared to theoretical prediction using both analytical and numerical calculations. An analysis of the influence of the static and dynamic dipolar coupling between the nano-pillar magnetic layers on the mode spectrum is performed.
Towards A Design Of A Software-Defined Manufacturing System Based On A Systematic Literature Review For Enabling A Decentralised High-Rate Electrolyser Production
Creators: name: Brandstetter, Alexander
name: Himmelstoss, Henry
name: Risling, Monika
name: Schel, Daniel
name: Oberle, Michael
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Konferenzschrift
subject: Software-Defined Manufacturing
subject: Enterprise IT Architecture
subject: High-Rate Production
subject: Decentralised Manufacturing
subject: Greenfield
subject: Electrolyser Production
subject: SDMS
subject: EA
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Hydrogen is critical for the transition to an environmentally sound and reliable energy supply. This transition requires large capacities of performant and cost-effective electrolysers. Although performant electrolysers already exist, they cannot yet be manufactured at a high rate in series production. The project H2Giga-FRHY is researching a reference factory for large-scale production of electrolysers, developing new production and testing modules. As an essential building block of the reference factory, a research group at Fraunhofer IPA is designing and implementing a comprehensive software-defined manufacturing system (SDMS), which supports the decentralized high-rate production of electrolysers and allows for far-reaching insights regarding high-rate capability, quality, and cost of products, processes, and technologies involved. For the SDMS implementation, different enterprise architecture (EA) approaches are considered and evaluated in the scope of a structured literature review with respect to criteria arising from the project context and related research questions. In this paper, an approach to designing a software-defined manufacturing system is described, and its necessity is based on the use case-specific criteria discussed.
Effect of Feeding Different Levels of Degummed Fenugreek (Trigonella foenum-graecum L.) Seed Meal on Palatability, Nutrient Utilization and Milk Yield in Lactating Crossbred Cows
Creators: name: S. M. Faruk-Ul-Alam
name: Sehgal J.P
Publisher: name: Journal of Science and Sustainable Development
Year: 2015

description: The effect of replacing soybean meal with feeding of different levels of degummed fenugreek seed meal (DSFM) in the concentrate mixture on palatability, nutrient utilization and milk yield in lactating crossbred cows was investigated. Eighteen lactating Karan Fries cows were divided into three groups based on milk yield and body weight. All the cows were offered a diet consisting of conventional concentrate mixture in the control group, replacing 33% of soybean meal (SBM) by DFSM for T1 and replacing 50% of soybean meal by DFSM for T2. All cows were fed concentrate mixture, green maize fodder and wheat straw in the ratio of 60:30:10 on DM basis, respectively. The duration of study was 150 days. Average dry matter intake and total milk yield was higher (P<0.05) in T1 and T2 groups as compared to control group even though the nutritive evaluation of rations in terms of %DCP and %TDN were same. The digestibility coefficiencies of DM, OM, EE, CF and ADF increased significantly (P<0.05) in treatment groups than control, although the digestibility of CP and NFE were remained similar. It was concluded that 50% replacement of SBM with DFSM in concentrate mixture having cost effectiveness and did not have any adverse effect on palatability, productive performance and nutrient digestibility in lactating cows.
description: Journal of Science and Sustainable Development, Vol. 3 No. 2 (2015)
Ditransitive structures in child language acquisition: an investigation of production and comprehension in children aged five to seven
Creators: name: Scherger, Anna-Lena
name: Kizilirmak, Jasmin M.
name: Folta-Schoofs, Kristian
Publisher: name: TU Dortmund
Year: 2022
Subjects: subject: Ditransitives
subject: Production-comprehension asymmetry
subject: Language acquisition
subject: Case marking
subject: 360
subject: 370
subject: Spracherwerb
subject: Kind | 5-7 Jahre

description: The aim of the present study was to investigate the acquisition of ditransitive structures beyond production. We conducted an elicitation task (production) and a picture-sentence matching task measuring accuracy and response times (comprehension). We examined German five-to seven-year-old typically developing children and an adult control group. Our data showed quasi-perfect performance in comprehension in adults and in those children who had already mastered ditransitives productively. However, children who had not yet mastered the production of ditransitives showed comprehension abilities preceding production abilities. Unlike adults, in the comprehension task children did not react explicitly before the end of the auditory stimulus.
description: Journal of child language;
UZOQ MUDDATLI DAVOLANISHGA MUHTOJ BOLALAR UCHUN TA'LIMNI TASHKIL ETISH
Creators: name: Begimova, Marjona
Publisher: name: Zenodo
Year: 2025

description: ushbu maqolada uzoq muddatli davolanuvchi bolalar uchun ta’lim tizimini tashkil qilish to’g’risida yoritilgan. Bundan tashqari tyuter faoliyati haqida va u nima ish qilishi haqida yozilgan.
To Pay or Not to Pay: Managerial Decision Making and Wage Withholding in Russia
Creators: name: Desai, Padma B.
name: Idson, Todd
Publisher: name: Columbia University
Year: 1998
Subjects: Labor economics

description: In this paper we investigate the decisions of Russian managers in distributing wage nonpayment in Russia during the 1994-96 period. Using a longitudinal survey of households, we identify a pattern of wage arrears across regions and industries which suggests that managers allocated nonpayment among workers so as to minimize the real wage declines experienced by higher productivity workers. This finding suggests that post-Soviet managers were responding more strongly to market incentives than to equity considerations in their wage withholding allocation decisions.
Estimation of models with grouped and ungrouped data by means of "2SLS"
Creators: name: Dhrymes, Phoebus J.
name: Lleras-Muney, Adriana
Publisher: name: Columbia University
Year: 2004
Subjects: Economics

description: This paper deals with a special case of estimation with grouped data, where the dependent variable is only available for groups, whereas the endogenous regressor(s) is available at the individual level. By estimating the first stage using the available individual data, and then estimating the second stage at the aggregate level, it might be possible to gain efficiency relative to the OLS and 2SLS estimators that use only grouped data. We term this the Mixed- 2SLS estimator (M2SLS). The M2SLS estimator is consistent and asymptotically normal. We also provide a test of efficiency of M2SLS relative to OLS and "2SLS" estimators.
Enhancing hole mobility in III-V semiconductors
Creators: name: Nainani, Aneesh
name: Bennett, Brian. R.
name: Boos, J. Brad
name: Ancona, Mario G.
name: Saraswat, Krishna C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Transistors based on III-V semiconductor materials have been used for a variety of analog and high frequency applications driven by the high electron mobilities in III-V materials. On the other hand, the hole mobility in III-V materials has always lagged compared to group-IV semiconductors such as silicon and germanium. In this paper we explore the used of strain and heterostructure design guided by bandstructure modeling to enhance the hole mobility in III-V materials. Parameters such as strain, valence band offset, effective masses and splitting between the light and heavy hole bands that are important for optimizing hole transport are measured quantitatively using various experimental techniques. A peak Hall mobility for the holes of 960cm2/Vs is demonstrated and the high hole mobility is maintained even at high sheet charge.
description: 18 pages, 21 figures
Role of structure of C-terminated 4H-SiC(000) surface in growth of graphene layers - transmission electron microscopy and density functional theory studies
Creators: name: Borysiuk, Jolanta
name: Sołtys, Jakub
name: Bożek, Rafal
name: Piechota, Jacek
name: Krukowski, Stanislaw
name: Strupinski, Wlodzimierz
name: Baranowski, Jacek M.
name: Stepniewski, Roman
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Principal structural defects in graphene layers, synthesized on a carbon-terminated face, i.e. the SiC(000) face of a 4H-SiC substrate, are investigated using microscopic methods. Results of high-resolution transmission electron microscopy (HRTEM) reveal their atomic arrangement. Mechanism of such defects creation, directly related to the underlying crystallographic structure of the SiC substrate, is elucidated. The connection between the 4H-SiC(000) surface morphology, including the presence of the single atomic steps, the sequences of atomic steps, and also the macrosteps, and the corresponding emergence of planar defective structure (discontinuities of carbon layers and wrinkles) is revealed. It is shown that disappearance of the multistep island leads to the creation of wrinkles in the graphene layers. The density functional theory (DFT) calculation results show that the diffusion of both silicon and carbon atoms is possible on a Si-terminated SiC surface at a high temperature close to 1600°C. The creation of buffer layer at the Si-terminated surface effectively blocks horizontal diffusion, preventing growth of thick graphene layer at this face. At the carbon terminated SiC surface, the buffer layer is absent leaving space for effective horizontal diffusion of both silicon and carbon atoms. DFT results show that excess carbon atoms converts a topmost carbon layer to sp2 bonded configuration, liberating Si atoms in barrierless process. The silicon atoms escape through the channels created at the bending layers defects, while the carbon atoms are incorporated into the growing graphene layers. These results explain growth of thick graphene underneath existing graphene cover and also the creation of the principal defects at the C-terminated SiC(0001) surface
description: 20 pages,11 figures
Flexibility-Driven Planning Of Flow-Based Mixed-Model Assembly Structures
Creators: name: Föhlisch, Nils
name: Burggräf, Peter
name: Adlon, Tobias
name: Kapella, Christopher
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Konferenzschrift
subject: Flexibility Assessment
subject: Assembly System Planning
subject: Matrix Assembly
subject: Line Assembly
subject: Flow-based Assembly
subject: Flexibility Requirements
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Trends such as mass customization, changing customer preferences and resulting output fluctuations increasingly challenge the production industry. Mixed-model assembly lines are affected by the rising product variety, which ultimately leads to ascending cycle time spreads and efficiency losses. Matrix assembly addresses these challenges by decoupling workstations and dissolving cycle time constraints while maintaining the flow. Both matrix and line assembly are flow-based assembly structures characterized by assembly objects moving along the stations. In assembly system planning, competing assembly structures are developed and the one best meeting the use case's requirements is selected for realization. During assessing requirements and selecting the superior assembly structure, the systematic consideration of flexibility is often not ensured within the planning approach. Therefore, a preferred assembly structure may not have the flexibility required for a use case. The systematic and data-driven assessment of required and provided flexibility in assembly system planning is necessary. This paper presents an assessment model that matches a use case's requirements with the flexibility of flow-based assembly structures based on production program and process data. On the one hand, requirements are defined by flexibility criteria that evaluate representative product mixes and process time heterogeneity. On the other hand, provided flexibility of flow-based assembly structures is assessed in a level-based classification. A method for comparing the requirements and the classification's levels to prioritize assembly structures for application in a case is developed. The flexibility requirements and assembly structure of an exemplary use case are determined and discussed under the planning project's insights to evaluate the developed model. This work contributes to the objective and data-driven selection of assembly structures by utilizing use case-specific data available during the phase of structural planning to meet flexibility requirements and ensure their consideration along the assembly planning process.
The QCD Critical End Point Under Strong Magnetic Fields
Creators: name: Avancini, Sidney S.
name: Menezes, Débora P.
name: Pinto, Marcus B.
name: Providência, Constança
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use the three-flavor Nambu--Jona-Lasinio model, which includes strangeness and quark physical masses in the mean field approximation, to investigate the influence of strong magnetic fields on the QCD phase diagram covering the whole $T-μ$ plane. It is found that the size of the first order transition line increases as the field strength increases so that a larger coexistence region for hadronic and quark matter should be expected for strong magnetic fields. The location of the critical end point is also affected by the presence of magnetic fields which invariably increase the temperature value at which the first order line terminates. On the other hand, the critical end point chemical potential value displays a subtle oscillation around the B=0 value for magnetic fields within the $10^{17}-10^{20} \, {\rm G}$ range. These findings may have non trivial consequences for the physics of magnetars and heavy ion collisions.
description: 5 pages, 2 figures
FATORES DE ADOÇÃO TECNOLÓGICA DE AMBIENTE VIRTUAL DE APRENDIZAGEM NO ENSINO À DISTÂNCIA
Creators: name: Claudinei de Almeida
name: Fernando Eduardo Kerschbaumer
Publisher: name: Zenodo
Year: 2025

description: Este estudo investigou os fatores de adoção tecnológica de um AVA no ensino à distância de uma universidade brasileira. Utilizou-se a abordagem qualitativa apoiada pela realização de entrevistas em profundidade e sob a lente teórica da abordagem da adoção da inovação por Rogers (2003). A revisão bibliográfica foi realizada a partir de cientometria, com apoio do software VOSviewer, a fim de identificar o estado da arte sobre a fronteira científica dos temas. O estudo indica que um novo sistema de gestão de aprendizagem permite atender ao aluno com maior navegabilidade, interatividade, gerando maior satisfação do discente, docente e funcionários. Além disso permite-se verificar que a satisfação também percebida para o professor e faz com ele se sinta valorizado, menos sobrecarregado. Este artigo propõe encaminhar a aplicação da inovação em uma universidade e os aspectos dessa adoção no processo de mudança de seu ambiente virtual de aprendizagem, o AVA. Os principais resultados da pesquisa apontaram que a adoção tecnológica do novo AVA seguiu as cinco etapas da abordagem teórica de Rogers (2003): conhecimento, persuasão, decisão, implementação e confirmação. A metodologia permitiu verificar as percepções dos diferentes papéis de entrevistados atuantes da área da educação à distância da instituição pesquisada. A contribuição social e para a gestão da universidade que implantou o novo AVA possibilitou compreender a geração de uma maior interação entre aluno e professor, melhoria na resolução de problemas e um relacionamento mais estreito no processo de ensino-aprendizagem.
Matrix model criticality and resonant tunneling
Creators: name: Tada, Tsukasa
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We suggest that the Hermitian matrix models with resonant tunneling may exhibit novel criticality. Some features of the proposed criticality are explored. In particular, we argue that the new critical point is connected with the first-order transition.
description: 11 pages, 6 figures. v2: References added
Minimum distance estimators for nonparametric models with grouped dependent
Creators: name: Das, Mitali
Publisher: name: Columbia University
Year: 2002
Subjects: Economics

description: This paper develops minimum distance estimators for nonparametric models where the dependent variable is known only to fall in a specified group with observable thresholds, while its true value remains unobserved and possibly censored. Such data arise commonly in major U.S and U.K data sets where, e.g., the thresholds between which earnings fall are observed, but not its level. Under minor regularity conditions identification of such a model is shown to depend on there being at least two thresholds when the model disturbance's distribution is smooth and invertible. Estimators are motivated by conversion of the model into a set of binary choice models, each corresponding to one finite-valued threshold. This conversion illustrates that the difference of any two thresholds from a function that depends on identified components is identically zero; the function of interest is an additive component of this identity. Minimum distance estimators for possibly nonlinear functionals of the model are proposed, and shown to be consistent with a limiting distribution that is Gaussian. Estimators of the covariance matrix are provided. The estimators are applied to estimation of a problem in labor economics.
Concept For Databased Sales And Resource Planning For Re-Assembly In The Automotive Industry
Creators: name: Schuh, Günther
name: Schmitz, Seth
name: Schopen, Marco
name: Neumann, Henning
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Konferenzschrift
subject: Production Planning
subject: Sales Planning
subject: Circular Economy
subject: Re-Assembly
subject: Internet of Production
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: In linear economy, the growing wealth in the world is linked to a growing resource consumption and greenhouse gas emission. This results in a shortage of primary resources, environmental destruction through resource extraction, and global warming. A high productivity of the manufacturing industry, overcapacities and a decrease in the value of existing products intensify this situation. Circular economy offers resource-efficient value addition by multiple utilization of resources. One challenge in this form of value creation is the duration of reconditioning processes and the lack of product innovation in reconditioned products. To bring products back to the market as quickly as possible, the method of Re-Assembly is introduced and focused in this paper. Re-Assembly can be defined as reconditioning old products into new or higher-valued products, by assembling new or remanufactured parts and components after disassembly. However, manufacturing companies face difficulties in industrialization of such methods. In practice, one of the biggest challenges is the mid- and long term planning of the reconditioning process. Due to uncertainties in the quality and quantity of the returning end-of-life products the resulting reconditioning process is challenging to predict in terms of process time and production costs. To encounter this, this paper presents a concept for sales and resource planning in the context of Re-Assembly. In the first step the uncertainties for the long term production planning and the resulting data requirements are identified. Based on this, a concept for sales and resource planning is presented. The approach is based on the Internet of Production reference framework and includes data from the whole product lifecycle. As the area of application, the automotive industry is chosen as it is the largest manufacturing industry in Germany and already leading in the recording of usage data of their products.
Upper critical fields and two-band superconductivity in Sr1-xEux(Fe0.89Co0.11)2As2 (x=0.203 and 0.463)
Creators: name: Hu, Rongwei
name: Mun, Eun Deok
name: Altarawneh, M. M.
name: Mielke, C. H.
name: Zapf, V. S.
name: Bud'ko, S. L.
name: Canfield, P. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The upper critical fields, Hc2 of single crystals of Sr1-xEux(Fe0.89Co0.11)2As2(x=0.203 and 0.463) were determined by radio frequency penetration depth measurements in pulsed magnetic fields. Hc2 approaches the Pauli limiting field but shows an upward curvature with an enhancement from the orbital limited field as inferred from Werthamer-Helfand-Hohenberg theory. We discuss the temperature dependence of the upper critical fields and the decreasing anisotropy using a two-band BCS model.
description: 5 pages, 4 figures
What role for empirics in international trade?
Creators: name: Davis, Donald R.
name: Weinstein, David E.
Publisher: name: Columbia University
Year: 2002
Subjects: Economics

description: In the field of international trade, data analysis has traditionally had quite modest influence relative to that of pure theory. At one time, this might have been rationalized by the paucity of empirics in the field or its weak theoretical foundations. In recent years empirical research has begun to provide an increasingly detailed view of the determinants of trade relations. Yet the field as a whole has been slow to incorporate these findings in its fundamental worldview. In this paper, we outline and extend what we view as key robust findings from the empirical literature that should be part of every international economists working knowledge.
Additional file 1 of Palbociclib treatment alters nucleotide biosynthesis and glutamine dependency in A549 cells
Creators: name: Conroy, Lindsey R.
name: Lorkiewicz, Pawel
name: He, Liqing
name: Yin, Xinmin
name: Zhang, Xiang
name: Rai, Shesh N.
name: Clem, Brian F.
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Cancer
subject: Virology

description: Additional file 1: Figure S1. Palbociclib decreases RB phosphorylation and proliferation of A549 lung cancer cells. Figure S2. Confirmation of siRNA-mediated knock-down of RB in A549 cells. Figure S3. Longer exposure to palbociclib does not alter glycolytic function in A549 cells.
NMR implementation of Quantum Delayed-Choice Experiment
Creators: name: Roy, Soumya Singha
name: Shukla, Abhishek
name: Mahesh, T. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report the first experimental demonstration of quantum delayed-choice experiment via nuclear magnetic resonance techniques. An ensemble of molecules each with two spin-1/2 nuclei are used as target and the ancilla qubits to perform the quantum circuit corresponding the delayed-choice setup. As expected in theory, our experiments clearly demonstrate the continuous morphing of the target qubit between particle-like and wave-like behaviors. The experimental visibility of the interference patterns shows good agreement with the theory.
description: Revised text, more figures added
Factors Influencing the Completion of Head and Neck Cancer Treatment: A Case Study of Tikur Anbessa Referral Hospital, Addis Ababa, Ethiopia
Creators: name: Arigawu, Alemayehu Siffir Arigawu
name: Enqusilase, Fikire
Publisher: name: Journal of Science and Sustainable Development
Year: 2015

description: Cancer is a class of disease in which group of cells display uncontrolled growth, invasion that intrude upon and destroy adjacent tissues, and sometimes metastasis or spreading to other locations in the body via lymph nodes or blood. The objective of this study was to identify the risk factors that determine the completion of treatments for head and neck cancer patients at Tikur Anbessa Referral Hospital, Addis Ababa, Ethiopia. It was a retrospective study and the data from patients who were registered at the Tikur Anbessa Referral Hospital between December 2007 to January 2010. The simple random sampling method, descriptive statistics and the Kaplan-Meier survival estimator were used to estimate and compare the survival times of the patients. The Cox proportional hazard regression model was applied to model treatment follow up time and examines the association between this time with different demographic and medical variables. Result showed that among 344 head and neck cancer (HNC) patients 38.4% discontinued treatment. The survival distribution of time until treatment discontinuation was found to be significantly related to sex, age interval, region, tumor size, lymph node size, initial stage of the cancer, type of treatment, and duration for radiotherapy that the patient took as well as the aim of the prescription radiotherapy. The log rank test showed that the survival probability of patients was not statistically different among groups classified by HNC site. The study hence identifies these factors as the main reason that affects the completion of HNC treatments. It is therefore suggested that patients should be well informed about the disease so that they follow up the treatment until completion to minimize the dropout rate.
description: Journal of Science and Sustainable Development, Vol. 3 No. 2 (2015)
Investigation of methylation and gene expression in placenta of pregnancies conceived by assisted reproductive technology (ART)
Creators: name: Sakian, Sina
Publisher: name: University of British Columbia
Year: 2011

description: With the increasing use of assisted reproductive techniques (ART) every year, concerns have been raised regarding the possible effect these procedures have on the health of the children procured by them. Although patients born via ART are usually healthy, studies have associated these procedures with increased incidence of low birth weight (LBW), chromosomal abnormalities, birth defects and imprinting disorders. No study has proposed a single defined cause for any of these defects in ART infants, however it is believed that they may be due to both the invasiveness of ART and to genetic defects that are at the root of the infertility in the parents. In this study, changes in the methylation of the H19 and IGF2 imprinting control region 1 (ICR1) were investigated for both ART (n=92) and naturally conceived controls (n=19) using pyrosequencing. Expression of H19 and IGF2 was also investigated for both the ART population (n=31) and controls (n=14) using quantitative real-time PCR. No significant changes in H19 or IGF2 methylation or gene expression were found between the ART groups and the natural conception group. Methylation levels at ICR1 for the IVF, ICSI and control cases were averaged at 49.3% ±3.4%, 49.6%±1.9% and 48.7%±1.7%, respectively. Compared to the controls IVF and ICSI patients both showed an increase in H19 gene expression (by a factor of 1.78±0.74 and 1.93±0.71, respectively) while showing a decrease (by a factor of 0.83±0.34 and 0.74±0.27, respectively) for the expression of IGF2; these differences were not proven significant using ANOVA (P > 0.05). The study did find, however, that the previously proposed H19 and IGF2 regulatory model is not a good indicator of how these two genes are controlled in human placenta. Comparing methylation analysis with expression analysis did not show the expected negative correlation implying that there may be other factors influencing the expression of H19 and IGF2 in human placental tissue. Although our results suggest that ART does not have a significant negative effect on H19 and IGF2 imprinting in the placenta, it merits further investigation looking at the regulation of these two genes in this tissue.