cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multiple Timescale Dispatch and Scheduling for Stochastic Reliability in Smart Grids with Wind Generation Integration
Creators: name: He, Miao
name: Murugesan, Sugumar
name: Zhang, Junshan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Systems and Control (eess.SY)
subject: Performance (cs.PF)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Integrating volatile renewable energy resources into the bulk power grid is challenging, due to the reliability requirement that at each instant the load and generation in the system remain balanced. In this study, we tackle this challenge for smart grid with integrated wind generation, by leveraging multi-timescale dispatch and scheduling. Specifically, we consider smart grids with two classes of energy users - traditional energy users and opportunistic energy users (e.g., smart meters or smart appliances), and investigate pricing and dispatch at two timescales, via day-ahead scheduling and realtime scheduling. In day-ahead scheduling, with the statistical information on wind generation and energy demands, we characterize the optimal procurement of the energy supply and the day-ahead retail price for the traditional energy users; in realtime scheduling, with the realization of wind generation and the load of traditional energy users, we optimize real-time prices to manage the opportunistic energy users so as to achieve systemwide reliability. More specifically, when the opportunistic users are non-persistent, i.e., a subset of them leave the power market when the real-time price is not acceptable, we obtain closedform solutions to the two-level scheduling problem. For the persistent case, we treat the scheduling problem as a multitimescale Markov decision process. We show that it can be recast, explicitly, as a classic Markov decision process with continuous state and action spaces, the solution to which can be found via standard techniques. We conclude that the proposed multi-scale dispatch and scheduling with real-time pricing can effectively address the volatility and uncertainty of wind generation and energy demand, and has the potential to improve the penetration of renewable energy into smart grids.
description: Submitted to IEEE Infocom 2011. Contains 10 pages and 4 figures. Replaces the previous arXiv submission (dated Aug-23-2010) with the same title
Removing the Margins: The Challenges and Possibilities of Inclusive Schooling by George J. Sefa Dei, Irma Marcia James, Leeno Luke Karumanchery, Sonia James-Wilson, and Jasmin Zine
Creators: name: Rinaldi, Christina
Publisher: name: Alberta Journal of Educational Research
Year: 2001

description: Alberta Journal of Educational Research, Vol. 47 No. 4 (2001): Winter 2001
ЦЕНТРЫ КОЖЕВЕННОЙ ПРОМЫШЛЕННОСТИ СОВЕТСКОЙ БАШКИРИИ (1933–1937 гг .)
Creators: name: О.П. Сайфутдинова
Publisher: name: Вестник Академии наук Республики Башкортостан
Year: 2020
Subjects: кожа
кожевенное производство
центр
завод
продукция

description: Исторически кожевенное производство являлось одним из самых значимых производств в промышленности. Изделия из кожи использовались почти во всех сферах жизнеобеспечения человека, из кожи делали обувь и одежду, сосуды и футляры, книжные переплеты и сами книги, ее использовали в отделке мебели и предметах военной одежды. Во многих регионах Советской России были расположены кожевенные предприятия, которые играли важную роль в становлении экономики. Кожевенные заводы, перешедшие под управление государства после революции, стали занимать решающие позиции в развивающейся промышленности страны. Они были стратегически важными предприятиями, поскольку эта отрасль была связана с немаловажным на тот момент фактором – импортозамещением. Годы первой пятилетки были стартом для экономического возрождения Башкирской Автономной Советской Социалистической Республики, равно как и для самой Российской Советской Федеративной Социалистической Республики. Правительством была поставлена задача обратить внимание на развитие легкой промышленности, в том числе кожевенно-обувной, притом в разрезе выпуска товаров первой необходимости – импортозамещающих. Задача кожевенной промышленности состояла в том, чтобы обеспечить население региона и страны в целом самым элементарным – одеждой и обувью. Вторая же пятилетка усилила задачи первой и была направлена на удержание имеющихся результатов по выпуску изделий из кожи и развитию кожевенных предприятий. К этому времени на территории Башкирии были сформированы и работали кожевенные центры, выпускающие товары из кожи разного назначения. В статье рассмотрены их работа и производство на примере второй пятилетки.
D7.1 Robotics system integration (first version)
Creators: name: PILOTING Project
Publisher: name: Zenodo
Year: 2022

description: One of PILOTING’s technological objectives is the integration of diverse robotic systems using open interfaces and a scalable architecture. The PILOTING Inspection & Maintenance (I&M) platform will be integrated with nine different types of robot vehicles and applied to three scenarios (refineries, bridges/viaducts, and tunnels). Following the iterative and incremental development strategy, the project is split in two main phases, each one being a complete development cycle composed of design, development, integration, testing and evaluation. This deliverable details the integration of the robotic systems in the first of the two main cycles.
COMPARATIVE STUDY OF THERMAL, STRUCTURAL,  CONDUCTIVITY AND DIALECTICAL PROPERTIES OF   LiNi0.925Mg0.075PO4  AND  LiNi0.9Mg0.1PO4  CATHODE MATERIALS
Creators: name: MUKEMIL SULTAN
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Mg substituted lithium nickel phosphates, LiNi0.925Mg0.075PO4 and LiNi0.9Mg0.1PO4  cathode
materials are synthesized by three steps solid state reaction method. These materials are
characterized by thermogravimetric analysis (TGA), differential thermogravimetric analysis
(DTA), x-ray powder diffraction (XRD),  energy dispersive spectroscopy (EDS),  Fourier
transform infrared (FT-IR) spectroscopy and complex impedance spectroscopy (CIS)
techniques. From TGA/DTA study, compound formation temperatures as well as the weight
loss regions are identified. XRD  studies of the prepared samples confirm the formation
of good crystallization and well-defined diffraction peaks without impurities. The single-
phase formations of both samples are also confirmed by EDS analysis. From FT-IR study,
different peaks are observed at different wavelength regions, which are responsible for the
formation of  LiNi0.925Mg0.075PO4  and LiNi0.9Mg0.1PO4  compounds.  From the impedance
analysis, it is found that the dielectric constant decreases sharply at low frequency as
compared to that at high frequency and become almost constant on further increasing the
frequency for both samples. The dc conductivity values of  LiNi0.925Mg0.075PO4  and
LiNi0.9Mg0.1PO4  are 3.8 x 10-9
  Scm-1
and 3.94 x 10-9
  Scm-1
, respectively. The obtained
conductivity results are found in the range of the electrical conductivity of semiconductor
(10-7
 to 103
 S/cm), indicating the semiconductor behavior of the samples.
SYNTHESIS AND CHARACTERIZATION OF Ni0.8Co0.2MnxFe2-xO4 NANO CRYSTALLINE FERRITE MATERIALS
Creators: name: GEZAHEGN GEZMU
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Nano sized Nio.8Co0.2MnxFe2-xO4  ferrites with varies compositions (x = 0.05 and 0.1)  are
successfully synthesized by  Sol–gel auto combustion method. The structure, morphology,
chemical composition, electrical, dielectric and magnetic properties of these  synthesized
samples  are investigated using  x-ray powder diffraction (XRD), scanning electron
microscopy (SEM), energy dispersive X-Ray spectroscopy (EDS), Fourier transform infrared
(FT-IR) spectroscopy, impedance  analyzer  (IR)  as well as  Electron spin resonance
spectroscopy (ESR). The XRD analysis confirms the phase purity of the synthesized ferrites.
It also reveals the formation of spinel structure for both prepared powder ferrites. The lattice
parameter and the crystal size of are identified to be 8.538 Å and 58.23 nm, respectively for
Ni0.8Co0.2Mn0.05Fe1.95O4 ferrite material; and  8.561 Å and 59.14 nm, respectively for
Ni0.8Co0.2Mn0.1Fe1.9O4  ferrite material. The average crystallite size calculated using Debye–
Scherer equation also confirms the nano crystalline nature of the samples.
EDS patterns confirm the compositional formation of the synthesized samples, i.e.,  both
compounds show the presence of Ni, Co, Mn, Fe and O elements. FT-IR spectra analysis
shows the appearance of two strong bands, which are responsible for the formation of cubic
spinel structures in both ferrites.  From the  electrical conductivity study,  two different
regions, which are frequency independent and dependent regions, are clearly identified. The
variation of dielectric properties with frequency shows the polarization behavior of both
ferrites. ESR study shows that both ferrite materials possess soft magnetization behavior at
room temperature. The magnetization curves of both samples show weak ferromagnetic
behavior, with slender hysteresis.
Ultrafast Dynamics of Carrier Multiplication in Quantum Dots
Creators: name: Schulze, Franz
name: Schoth, Mario
name: Woggon, Ulrike
name: Weber, Carsten
name: Knorr, Andreas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A quantum-kinetic approach to the ultrafast dynamics of carrier multiplication in semiconductor quantum dots is presented. We investigate the underlying dynamics in the electronic subband occupations and the time-resolved optical emission spectrum, focusing on the interplay between the light-matter and the Coulomb interaction. We find a transition between qualitatively differing behaviors of carrier multiplication, which is controlled by the ratio of the interaction induced time scale and the pulse duration of the exciting light pulse. On short time scales, i.e., before intra-band relaxation, this opens the possibility of detecting carrier multiplication without refering to measurements of (multi-)exciton lifetimes.
description: 12 pages, 7 figures, submitted
The Millions of Optical-Radio/X-ray Associations (MORX) Catalogue, v2
Creators: name: Flesch, Eric Wim
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Announcing the release v2 of the MORX (Millions of Optical-Radio/X-ray Associations) catalogue which presents probable (40%-100% likelihood) radio/X-ray associations, including double radio lobes, to optical objects over the whole sky. Detections from all the largest radio/X-ray surveys to June 2023 are evaluated, those surveys being VLASS, LoTSS, RACS, FIRST, NVSS, and SUMSS radio surveys, and Chandra, XMM-Newton, Swift, and ROSAT X-ray surveys. The totals are 3,115,575 optical objects of all classifications (or unclassified) so associated. The MORX v2 catalogue is available on multiple sites.
description: 7 pages, 3 tables, 1 figure. Accepted by the Open Journal of Astrophysics (OJAp)
REVIEW OF FRICTION, WEAR AND MECHANICAL PROPERTIES OF  ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE USED IN TOTAL  JOINT REPLACEMENT
Creators: name: BABISA BAZULA
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: This project work is areview of  the  experimental techniques that can be applied  to
ultrahigh molecular weight polyethylene (UHMWPE), which is commonly used in total
joint replacement (TJR).The limitations  of these techniques  caused by the inherent
properties of the material or the instruments for characterization are discussed.The
friction, wear and  mechanical properties  of UHMWPE as a  function of polymer
crystallinity in both micro and nano scale are reviewed.

Keywords:  Total joint replacements; Ultra-high molecular weight polyethylene
(UHMWPE); Crystallinity; Friction; Wear
A mechanical model for Fourier's law of heat conduction
Creators: name: Ruelle, David
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Nonequilibrium statistical mechanics close to equilibrium is a physically satisfactory theory centered on the linear response formula of Green-Kubo. This formula results from a formal first order perturbation calculation without rigorous justification. A rigorous derivation of Fourier's law for heat conduction from the laws of mechanics remains thus a major unsolved problem. In this note we present a deterministic mechanical model of a heat-conducting chain with nontrivial interactions, where kinetic energy fluctuations at the nodes of the chain are removed. In this model the derivation of Fourier's law can proceed rigorously.
Design of dental crowns using glass fiber composites : a finite element study on the effect of fiber orientation
Creators: name: Nikam, Dipti Rajendra
Publisher: name: University of British Columbia
Year: 2019

description: Ceramic-based materials are currently a popular choice for fabricating dental crowns, owing to their aesthetics and cost advantages, even though they occasionally show failures due to their brittle nature. Recently, the glass fiber dental composites (GFDCs) with polymeric resins have drawn interest of researchers and dental labs as a replacement for traditional crown materials, owing to the expected superior wear resistance, aesthetic properties as well as the ability to customize mechanical properties of the manufactured crown in desired loading directions. The current, commercially available GFDCs mostly have the fibers parallel to horizontal plane-X with respect to the teeth loading directions, and there is limited study to understand the effect of fiber orientation in optimizing performance of such crowns. In addition, the past in-vitro and in-vivo studies on dentistry materials lack a level of consistency in the applied loading and boundary conditions for modeling and validation. This study aims at a finite element-based comparative analysis of natural and series of artificial dental implants supported by a single incisor crown, in order to understand the load distributions and stress concentration patterns at different material configurations. Namely, an artificial crown was analyzed for both ceramic and a typical GFDC with three different fiber orientations. The 3D numerical models were subjected to 100N loading on four different faces of the tooth, at four different fiber angles. It was observed that the higher loading faces with respect to the tip of the crown and higher loading angles are mainly responsible for the highest mechanical stresses in the crown, regardless of the material configuration. However, the ceramic crowns generated higher stresses in the assembly compared to the natural tooth, whereas the use of GFDC in the crown showed a favorable outcome; i.e. much closer to the natural tooth, especially when it was covered with a veneering layer of porcelain and when the fibers were oriented along the tooth long axis.
Domain-Walls in Einstein-Gauss-Bonnet Bulk
Creators: name: Mazharimousavi, S. Habib
name: Halilsoy, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the dynamics of a d-dimensional domain wall (DW) in a d+1-dimensional Einstein-Gauss-Bonnet (EGB) bulk. Exact effective potential induced by the Gauss-Bonnet (GB) term on the wall is derived. In the absence of the GB term we recover the familiar gravitational and anti-harmonic oscillator potentials. Inclusion of the GB correction gives rise to a minimum radius of bounce for the Friedmann-Robertson-Walker (FRW) universe expanding with a negative pressure on the DW.
description: 4 pages and 4 figures, to appear in PRD
The impact of anatomical uncertainties on the predictions of a musculoskeletal hand model – a sensitivity study
Creators: name: Melzner, Maximilian
name: Süß, Franz
name: Dendorfer, Sebastian
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Medicine
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: Outputs of musculoskeletal models should be considered probabilistic rather than deterministic as they are affected by inaccuracies and estimations associated with the development of the model. One of these uncertainties being critical for modeling arises from the determination of the muscles' line of action and the physiological cross-sectional area. Therefore, the aim of this study was to evaluate the outcome sensitivity of model predictions from a musculoskeletal hand model in comparison to the uncertainty of these input parameters. For this purpose, the kinematics and muscle activities of different hand movements (abduction of the fingers, abduction of the thumb, and flexion of the thumb) were recorded. One thousand simulations were calculated for each movement using the Latin hypercube sampling method with a corresponding variation of the muscle origin/insertion points and the cross-sectional area. Comparing the standard hand to simulations incorporating uncertainties of input parameters shows no major deviations in on- and off-set time point of muscle activities. About 60% of simulations are located within a ± 30% interval around the standard model concerning joint reaction forces. The comparison with the variation of the input data leads to the conclusion that the standard hand model is able to provide not over-scattered outcomes and, therefore, can be considered relatively stable. These results are of practical importance to the personalization of a musculoskeletal model with subject-specific bone geometries and hence changed muscle line of action.
Evaluation of Speaker Anonymization on Emotional Speech
Creators: name: Nourtel, Hubert
name: Champion, Pierre
name: Jouvet, Denis
name: Larcher, Anthony
name: Tahon, Marie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Speech data carries a range of personal information, such as the speaker's identity and emotional state. These attributes can be used for malicious purposes. With the development of virtual assistants, a new generation of privacy threats has emerged. Current studies have addressed the topic of preserving speech privacy. One of them, the VoicePrivacy initiative aims to promote the development of privacy preservation tools for speech technology. The task selected for the VoicePrivacy 2020 Challenge (VPC) is about speaker anonymization. The goal is to hide the source speaker's identity while preserving the linguistic information. The baseline of the VPC makes use of a voice conversion. This paper studies the impact of the speaker anonymization baseline system of the VPC on emotional information present in speech utterances. Evaluation is performed following the VPC rules regarding the attackers' knowledge about the anonymization system. Our results show that the VPC baseline system does not suppress speakers' emotions against informed attackers. When comparing anonymized speech to original speech, the emotion recognition performance is degraded by 15\% relative to IEMOCAP data, similar to the degradation observed for automatic speech recognition used to evaluate the preservation of the linguistic information.
SUBSTITUTION EFFECT ON THE STRUCTURE, MORPHOLOGY, ELECTRICAL AND DIELECTRIC PROPERTIES OF Mn0.85 (Ni, Zn)0.15 Fe2O4  FERRITE MATERIALS
Creators: name: TEKETEL YOHANNIS LAMBEBO
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: In this  study, Ni and Zn substituted manganese ferrites,  Mn0.85(Ni, Zn)0.15Fe2O4,  are
successfully  synthesized by Sol-gel method.  X-ray  powder  diffraction  (XRD),  scanning
electron microscopy  (SEM), energy dispersive  spectroscopy  (EDS),  Fourier  transform
infrared spectroscopy  (FT-IR) and  impedance spectroscopy  (IS) characterization techniques
are employed to identify the effect of the substitution process on  the structure, morphology,
chemical composition, electrical and dielectric properties of these ferrite materials. The XRD
results confirms  that all peaks appeared from both ferrite materials are very sharp and well-
defined, which indicates a high crystallinity of both samples. It also reveals the formation of
cubic spinel structure with space group Fd3m.  The average  crystal sizes  are  found to be
63nm for Mn0.85Ni0.15Fe2O4 and 61.4nm for Mn0.85Zn0.15Fe2O4 ferrites. SEM images confirm
that both the prepared samples are almost porous and they have fair uniform closely packed
distribution of particles. The EDS analysis reveals that all Mn, Fe, Ni, Zn and O elements are
detected in both samples synthesized at 700°C in air for 8hrs. FT-IR  study  shows, the  two
strong bands appeared at wavenumbers 582.53 and 591.21cm-1
  for Mn0.85Ni0.15Fe2O4 and
Mn0.85Zn0.15Fe2O4 ferrites, respectively that reveal the formation of the cubic spinel structure.
The Cole-Cole plots  for Mn0.85Ni0.15Fe2O4 and Mn0.85Zn0.15Fe2O4  ferrites measured at room
temperature in the frequency range from 1Hz to 1MHz show the formation of two successive
semicircles from both ferrites. The impedance spectroscopic analysis shows that the values of
Z′ for both samples are found to decrease with increase in frequency. It is also found that the
dielectric constant decreases continuously with increasing frequency and becomes constant at
higher frequency region at room temperature.
Asymptotic Symmetries of Rindler Space at the Horizon and Null Infinity
Creators: name: Chung, Hyeyoun
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the asymptotic symmetries of Rindler space at null infinity and at the event horizon using both systematic and ad hoc methods. We find that the approaches that yield infinite-dimensional asymptotic symmetry algebras in the case of anti-de Sitter and flat spaces only give a finite-dimensional algebra for Rindler space at null infinity. We calculate the charges corresponding to these symmetries and confirm that they are finite, conserved, and integrable, and that the algebra of charges gives a representation of the asymptotic symmetry algebra. We also use relaxed boundary conditions to find infinite-dimensional asymptotic symmetry algebras for Rindler space at null infinity and at the event horizon. We compute the charges corresponding to these symmetries and confirm that they are finite and integrable. We also determine sufficient conditions for the charges to be conserved on-shell, and for the charge algebra to give a representation of the asymptotic symmetry algebra. In all cases, we find that the central extension of the charge algebra is trivial.
description: 37 pages, 4 figures. Version 3: New Section 5 added
Dust Obscuration in Lyman Break Galaxies at z~4
Creators: name: Ho, I-Ting
name: Wang, Wei-Hao
name: Morrison, Glenn E.
name: Miller, Neal A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Measuring star formation rates (SFRs) in high-z galaxies with their rest-frame ultraviolet (UV) continuum can be uncertain because of dust obscuration. Prior studies had used the submillimeter emission at 850 um to determine the intrinsic SFRs of rest-frame UV selected galaxies, but the results suffered from the low sensitivity and poor resolution (~15''). Here, we use ultradeep Very Large Array 1.4 GHz images with ~1''-2'' resolutions to measure the intrinsic SFRs. We perform stacking analyses in the radio images centered on ~3500 Lyman break galaxies (LBGs) at z~4 in the Great Observatories Origins Deep Survey-North and South fields selected with Hubble Space Telescope/Advanced Camera for Surveys data. The stacked radio flux is very low, 0.08+/-0.15 uJy, implying a mean SFR of 6+/-11 M/yr. This is comparable to the uncorrected mean UV SFRs of 5 M/yr, implying that the z~4 LBGs have little dust extinction. The low SFR and dust extinction support the previous results that z~4 LBGs are in general not submillimeter galaxies. We further show that there is no statistically significant excess of dust-hidden star-forming components within ~22 kpc from the LBGs.
description: 6 pages, 3 figures, and 2 tables. Accepted to the Astrophysical Journal (ApJ)
A Survey of Beam Management for mmWave and THz Communications Towards 6G
Creators: name: Xue, Qing
name: Ji, Chengwang
name: Ma, Shaodan
name: Guo, Jiajia
name: Xu, Yongjun
name: Chen, Qianbin
name: Zhang, Wei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Theory (cs.IT)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Communication in millimeter wave (mmWave) and even terahertz (THz) frequency bands is ushering in a new era of wireless communications. Beam management, namely initial access and beam tracking, has been recognized as an essential technique to ensure robust mmWave/THz communications, especially for mobile scenarios. However, narrow beams at higher carrier frequency lead to huge beam measurement overhead, which has a negative impact on beam acquisition and tracking. In addition, the beam management process is further complicated by the fluctuation of mmWave/THz channels, the random movement patterns of users, and the dynamic changes in the environment. For mmWave and THz communications toward 6G, we have witnessed a substantial increase in research and industrial attention on artificial intelligence (AI), reconfigurable intelligent surface (RIS), and integrated sensing and communications (ISAC). The introduction of these enabling technologies presents both open opportunities and unique challenges for beam management. In this paper, we present a comprehensive survey on mmWave and THz beam management. Further, we give some insights on technical challenges and future research directions in this promising area.
description: accepted by IEEE Communications Surveys & Tutorials
REVIEW OF FRICTION AND MECHANICAL PROPERTIES OF GRAPHENE FROM MODELLING AND EXPERIMENTAL DATA.
Creators: name: SOLOMON YONAS ZALO
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Since its easy isolation by the exfoliation of graphite in 2004 by Novoselov, Geim and co-
workers,  graphene  has  been  attracting  enormous  attention  to  the  scientific  community.
Because of its unique properties, graphene has made way for technological applications in
many  areas  such  as  lithium  battery,  touch  screen,  medical  treatment,  and  energy
harvesting. Problems associated with explosion and cracking and efficient use of a device
can  be  solved with  the  help  of  graphene  novel  properties.  The  electrical,  thermal  and
optical properties of graphene were well studied and  the mechanical property was under
investigation.  Here,  the  reviewer  has  reviewed  the  methods  of  syntheses  and
characterization of the mechanical and the frictional properties of graphene and based on
Experimental and modeling data the frictional and the mechanical properties of graphene
reviewed.
Control of light transmission through opaque scattering media in space and time
Creators: name: Aulbach, Jochen
name: Gjonaj, Bergin
name: Johnson, Patrick M.
name: Mosk, Allard P.
name: Lagendijk, Ad
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report the first experimental demonstration of combined spatial and temporal control of light trajectories through opaque media. This control is achieved by solely manipulating spatial degrees of freedom of the incident wavefront. As an application, we demonstrate that the present approach is capable to form bandwidth-limited ultrashort pulses from the otherwise randomly transmitted light with a controllable interaction time of the pulses with the medium. Our approach provides a new tool for fundamental studies of light propagation in complex media and has potential for applications for coherent control, sensing and imaging in nano- and biophotonics.
Factors influencing the oral health practices of Chinese immigrant parents for their young children (ages 0-6) in Vancouver and Richmond, BC : parents’ and service providers’ perspectives
Creators: name: Gao, Hui Juan
Publisher: name: University of British Columbia
Year: 2019

description: Background: Early Childhood Caries (ECC) is a prevalent chronic condition affecting the health of young children (ages 0-6) worldwide, despite being mostly preventable through the adoption of effective oral health care practices. In both Canada and the United States, immigrant children suffer disproportionately from dental caries as compared to non-immigrant children. Limited research has examined the factors influencing oral health and care of young children from immigrant families in Canada. Objective: This qualitative exploratory study was carried out to examine the multi-level factors influencing the oral health care of young children (ages 0-6) from recent Chinese immigrant families residing in the cities of Vancouver and Richmond, British Columbia. Method: Working within a social constructivist paradigm, this study included Chinese immigrant parents (n=15), dental professionals (n=4) and community agency members (n=3) recruited from six different community sites using purposeful sampling. Semi-structured individual interviews were conducted until data saturation was reached. Interviews were transcribed verbatim and analyzed thematically to develop themes and sub-themes to summarize the findings. Results: Parents generally devoted much effort into establishing and modifying regular oral health care for their children and have improved their knowledge and understandings about oral health following immigration to Canada. Support was provided to parents in both oral health home care and professional dental care from family members, social networks, communities and professional dental care teams. Despite the support received, parents continued to experience major challenges in the areas of lacking translated and consistent oral health care information, lack of/insufficient dental payment assistance programs, and significant language and communication barriers. Conclusion: Given the ongoing challenges experienced by Chinese immigrant families, collaborative effort is needed from all levels of the government, residential and cultural communities and health care organizations to deliver consistent and practical oral health care information using various media platforms targeting immigrant communities, improve dental coverage for lower-to-middle income families, and mobilize resources to provide necessary translation and interpretation services to new immigrant families.
Sound in occupied open-plan offices: Objective metrics with a review of historical perspectives
Creators: name: Yadav, Manuj
name: Cabrera, Densil
name: Kim, Jungsoo
name: Fels, Janina
name: de Dear, Richard
Publisher: name: arXiv
Year: 2023
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Open-plan offices (OPOs) have been around for more than half a century now, chronicling the vicissitudes of workplace topography amongst other factors. This paper addresses one such factor - the sound environment in occupied OPOs in relation to several objective workplace parameters, using measurements in contemporary OPOs and comparisons with studies over the last 50 years. Omnidirectional and binaural sound measurements were conducted in 43 offices during typical working hours. The results describe variation in several acoustic and psychoacoustic metrics, and present statistical models that predict these metrics as a function of the number of workstations in offices. LA,eq of 53.6 dB is typical for occupied OPOs, with spectral slope of approximately -4 dB/octave. LA,eq values do not vary much over the workplace parameters studied (e.g., floor plate area, work activity, etc), except for -2.7 dB and -4.1 dB differences between offices with/without carpeting, and offices with ceiling absorption but with/without carpeting, respectively; most likely from reduced floor impact noise leading to speech level reduction. Sound fluctuation, as characterised by the metric Noise Climate (NCl: LA10 - LA90) and the psychoacoustic Fluctuation Strength (FS), decreases significantly with increasing number of workstations in OPOs. This suggests lesser auditory distraction in larger offices, which needs further investigation. In terms of historical trends, OPOs have become quieter over the years, especially background noise quantified as LA90, although there are several subtleties. Overall, current findings can inform several OPO design perspectives including policy documents, provide values for laboratory simulations of OPO acoustic environments, help interpret subjective impressions of OPO occupants, etc.
Measurement of the t t-bar production cross section and the top quark mass in the dilepton channel in pp collisions at sqrt(s) =7 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The t t-bar production cross section and top quark mass are measured in proton-proton collisions at sqrt(s) = 7 TeV in a data sample corresponding to an integrated luminosity of 36 inverse picobarns collected by the CMS experiment. The measurements are performed in events with two leptons (electrons or muons) in the final state. Results of the cross section measurement in events with and without b-quark identification are obtained and combined. The measured value is sigma(t t-bar)=168 +/- 18 (stat.) +/- 14 (syst.) +/- 7 (lumi.) pb, consistent with predictions from the standard model. The top quark mass m(top) is reconstructed with two different methods, a full kinematic analysis and a matrix weighting technique. The combination yields a measurement of m(top)=175.5 +/- 4.6 (stat.) +/- 4.6 (syst.) GeV/c^2.
THERMAL, ELECTRICAL AND DIELECTRIC PROPERTIES STUDIES OF LiMn1.977M0.023O4 (M = Ce, Cu) MATERIALS
Creators: name: BIRHANU BELETE
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Lithium manganese oxide LiMn2O4  is recently one of the most intensively studied cathode
materials for lithium ion batteries, due to its low cost and non-toxic nature when compared
with other layered oxides such as LiCoO2  and LiNiO2. However,  LiMn2O4shows severe
capacity fading with cycling as compared to  LiCoO2. Different methods are  employed  to
minimize the aforementioned problems. Spinel LiMn1.977M0.023O4 (M = Cerium, Cu) cathode
materials were  synthesized  by sol-gel method using citric acid as a chelating agent. The
materials were  characterized by  using TGA/DTA, XRD,  FT-IR spectroscopy,  Raman
spectroscopy  and inductance, capacitance & resistance (LCR) meter. The TGA/DTA result
indicates that  exothermic peaks, large weight loss regions,  which are attributed to  the
decomposition of nitrate precursors, are identified. The XRD results of both materials revile
the formation of pure spinel phases with Fd-3m space group without any secondary phases or
impurities.  It  is also found that the  lattice constant of spinel LiMn1.977Ce0.023O4  (8.26 Å) is
larger than that of LiMn1.977Cu0.023O4  (8.249 Å). The FT-IR spectroscopy study shows that
Ce
3+
  and Cu2+
  sabstituted spinels exhibit two strong absorbation spectral bands, which  are
responsible for the formation of the synthesized materials. Similar results are also found from
Raman spectroscopy study. The room temperature conductivity of both samples is found to
be 3.0 x 10-5
  S/cm for LiMn1.977Ce0.023O4  electrode and 2.58 x 10-5
  S/cm for
LiMn1.977Cu0.023O4 electrode. From the dielectric constant ε′ as a function of frequency study,
it is observed that value of ε′  maximum at lower frequencies and  it  begins to drop and
becomes constant at higher frequencies.
SYNTHESIS AND CHARACTERIZATION OF CUBIC MgFe2O4 AND  Mg0.9Ni0.1Al0.1Fe1.9O4 POWDER MAGNETIC MATERIALS
Creators: name: EDAO SADO
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: MgFe2O4 and Mg0.9Ni0.1 Al0.1Fe1.9O4 ferrites were prepared by solid state reaction method for
systematic investigation of their thermal, structure and magnetic properties. Single phase
cubic spinel structure of the prepared materials was confirmed by X-ray diffraction analysis.
Lattice parameter such as lattice constant, crystal size, unite cell volume, surface area and
porosity of the synthesized materials were also calculated from x-ray diffraction patterns.
The crystal sizes were found to be 66.9 nm for  MgFe2O4  and 67.05 nm for  Mg0.9Ni0.1
Al0.1Fe1.9O4. The lattice parameters were also found to be  0.8381 nm and 0.8403 nm for
MgFe2O4 and Mg0.9Ni0.1 Al0.1Fe1.9O4 ferries, respectively. This showed that substitution of Ni
and Al cations into MgFe2O4  increased its crystal size and lattice parameter.   From FT-IR
study, two absorption bands were observed between 417.3 and 568.9  cm−1
 wave numbers,
which  correspond  to the formation of the spinel cubic structure of both synthesized
compounds.  The magnetic properties of both synthesized materials were investigated by
studying the saturation magnetization (Ms), remanent magnetization (Hr) and coercivity (Hc)
using VSM. It was found that MgFe2O4 ferrite sample showed Ms, Mr and Hc values of 96.3
emu/g, 24.3 emu/g and 33.4 Gauss, respectively. In the case of Mg0.9Ni0.1Al0.1Fe1.9O4 ferrite
sample, the Ms, Mr and Hc values were  found to be 79.2 emu/g, 19.8 emu g−1 and
50.1Gauss, respectively.  The lower in saturation magnetization on Mg0.9Ni0.1Al0.1Fe1.9O4
ferrite sample may be attributed to the non-magnetic nature of Al
3+
 ions.
Criminal Policy in the Management of Road Traffic Accidents
Creators: name: Pamungkas, Yulius Harya
name: Bakri, Moch
name: Djatmika, Prija
name: Safa’at, Rachmad
Publisher: name: Italian Review of Legal History
Year: 2020

description: Acceleration in modern life requires acceleration, including acceleration on the highway. The accumulation of interests that are centralized on this highway creates a conflict of interest that ends in material loss or loss of life. Many road users do not realize that the legal consequences of negligence are categorized as criminal acts because they cause others to suffer. Legal politics the issuance of Law Number 22 of 2009 concerning Road Traffic and Transportation as an embodiment of criminal policy to provide legal protection and legal certainty for citizens who are casualties of road traffic accidents. Through criminal policy, it is expected that there will be order, smoothness, security in road traffic and legal certainty and legal protection for road users.
description: Italian Review of Legal History, No 6 (2020)
Experimental data about the evacuation of preschool children from nursery schools -- Part I: Pre-movement behaviour
Creators: name: Najmanová, Hana
name: Ronchi, Enrico
Publisher: name: arXiv
Year: 2023
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: This article presents experimental data sets and information about the pre-movement behaviour and specific evacuation conditions observed in 15 evacuation drills in 10 nursery schools in the Czech Republic involving 970 children (3-7 years of age) and 87 staff members. Based on the analysis of video recordings, over 1800 data points describing pre-movement times, the interpretation of warning signals, the reactions and activities of staff members and children, levels of physical assistance provided to the children, and exiting strategies were gathered, interpreted, and compared to key literature findings. Our observations showed that pre-movement times measured during the drills ranged from 3 to 59 s, depending on experimental conditions, and physical help was provided to 25% of the participating children. The pre-movement behaviour of the participants was strongly influenced by the instructions provided to children as well as the daily routines, rules, and educational practices employed in the nursery schools. In addition, the principles of the affiliation model and role-rule model were identified as applicable to preschool children. To enable engineering applications (e.g., in evacuation modeling studies), findings are presented together with a set of nine behavioural statements regarding the pre-movement behaviour of preschool children.
STUDY OF THERMAL, STRUCTURAL AND  ELECTROCHEMICAL PROPERTIES OF SPINEL CATHODE  MATERIALS FOR LITHIUM ION BATTERIES
Creators: name: CHILOTAW TSONA
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: In this study, spinel LiMn2O4, Li1.025(Mn1.95Ni0.025Fe0.025)O4  and Li1.025(Mn1.9Ni0.025Fe0.05)O4
cathode materials were effectively synthesized by two steps solid state reaction method. The
thermal,  structural  and  electrochemical  properties  of  thesecathode  materials  were
characterized  by  Thermogravimetric  and  Differential  thermogravimetric  analysis
(TGA/DTA),x-ray powder diffraction (XRD), scanning electron microscope (SEM), Fouriertransform infrared spectroscopy  (FT-IR)  and  Galvanostatic  charge/discharge  Test
(GCDT).TGA/DTA  analysis  confirmed  that  800
o
C  is  the appropriate  temperature  for
synthesizing LiMn2O4, Li1.025(Mn1.95Ni0.025Fe0.025)O4 and Li1.025(Mn1.9Ni0.025Fe0.05)O4 cathode
materials using Li2CO3, Fe2O3, MnO2 and NiO precursors.The XRD analysis reveals that all
synthesized spinel cathode materials are in cubic spinel structure with Fd-3m space group.
From obtained XRD data, different structural parameters are also `suggested. To examine the
surface morphology of the pure and doped LiMn2O4, SEM was used.  From the FT-IR study
of the material, two distinct strong absorption peaks are identified in the wavenumber region
of512 cm
-1
to 621 cm
-1
.The room temperature the discharge specific capacity of all cathode
materials,for LiMn2O4,  Li1.025(Mn1.95Ni0.025Fe0.025)O4 and Li1.025(Mn1.9Ni0.025Fe0.05)O4 were
found to be 96.4mAh/g, 108.4mAh/gand 112 mAh/g respectively.
A probabilistic approach to some results by Nieto and Truax
Creators: name: Vignat, C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper, we reconsider some results by Nieto and Truax about generating functions for arbitrary order coherent and squeezed states. These results were obtained using the exponential of the Laplacian operator; more elaborated operational identities were used by Dattoli et al. \cite{Dattoli} to extend these results. In this note, we show that the operational approach can be replaced by a purely probabilistic approach, in the sense that the exponential of derivatives operators can be identified with equivalent expectation operators. This approach brings new insight about the kinks between operational and probabilistic calculus.
description: 2nd version
Legal Status of Flat Unit Ownership Certificate (Strata Title) in Indonesia
Creators: name: Susanto, I Made Herman
name: R, Ibrahim
Publisher: name: Italian Review of Legal History
Year: 2020

description: This study seeks to examine the legal status of flat unit ownership rights between Law Number 5 of 1960 and Law Number 20 of 2011; by using normative legal research (statute approach and concept approach), this research concludes: the legal status of flat unit ownership certificate as stipulated in the Law Number 5 of 1960 and Law Number 20 of 2011 cannot be said to have a conflict of legal norms. The difference in interpretation of those laws can be resolved by: (1) The principle of lex specialis derogat lex generale, means specific laws (in this case is Law Number 20 of 2011 concerning Flats) overrides general laws (in this case is Law Number 5 of 1960 concerning Basic Agrarian Law); (2) Article 16 paragraph (1) letter h of Law Number 5 of 1960 concerning Basic Agrarian Law provides: other rights not included in the previously mentioned rights will be stipulated in the law, as well as the temporary rights as referred to in article 53; thus, the term flat unit ownership certificate can be accepted because it does not conflict with applicable laws and regulations.
description: Italian Review of Legal History, No 6 (2020)
Edge Preserving Image Denoising in Reproducing Kernel Hilbert Spaces
Creators: name: Bouboulis, Pantelis
name: Theodoridis, Sergios
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The goal of this paper is the development of a novel approach for the problem of Noise Removal, based on the theory of Reproducing Kernels Hilbert Spaces (RKHS). The problem is cast as an optimization task in a RKHS, by taking advantage of the celebrated semiparametric Representer Theorem. Examples verify that in the presence of gaussian noise the proposed method performs relatively well compared to wavelet based technics and outperforms them significantly in the presence of impulse or mixed noise. A more detailed version of this work has been published in the IEEE Trans. Im. Proc. : P. Bouboulis, K. Slavakis and S. Theodoridis, Adaptive Kernel-based Image Denoising employing Semi-Parametric Regularization, IEEE Transactions on Image Processing, vol 19(6), 2010, 1465 - 1479.
description: This work has been selected for the Best Scientific Paper Award (Track III: Signal, Speech, Image and Video Processing) at the ICPR 2010
Taxonomizing and Measuring Representational Harms: A Look at Image Tagging
Creators: name: Katzman, Jared
name: Wang, Angelina
name: Scheuerman, Morgan
name: Blodgett, Su Lin
name: Laird, Kristen
name: Wallach, Hanna
name: Barocas, Solon
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: In this paper, we examine computational approaches for measuring the "fairness" of image tagging systems, finding that they cluster into five distinct categories, each with its own analytic foundation. We also identify a range of normative concerns that are often collapsed under the terms "unfairness," "bias," or even "discrimination" when discussing problematic cases of image tagging. Specifically, we identify four types of representational harms that can be caused by image tagging systems, providing concrete examples of each. We then consider how different computational measurement approaches map to each of these types, demonstrating that there is not a one-to-one mapping. Our findings emphasize that no single measurement approach will be definitive and that it is not possible to infer from the use of a particular measurement approach which type of harm was intended to be measured. Lastly, equipped with this more granular understanding of the types of representational harms that can be caused by image tagging systems, we show that attempts to mitigate some of these types of harms may be in tension with one another.
description: AAAI-23 Special Track on AI for Social Impact