cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fourier synthesis dispersion engineering of photonic crystal microrings for broadband frequency combs
Creators: name: Moille, Gregory
name: Lu, Xiyuan
name: Stone, Jordan
name: Westly, Daron
name: Srinivasan, Kartik
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Dispersion engineering of microring resonators is crucial for optical frequency comb applications, to achieve targeted bandwidths and powers of individual comb teeth. However, conventional microrings only present two geometric degrees of freedom -- width and thickness -- which limits the degree to which dispersion can be controlled. We present a technique where we tune individual resonance frequencies for arbitrary dispersion tailoring. Using a photonic crystal microring resonator that induces coupling to both directions of propagation within the ring, we investigate an intuitive design based on Fourier synthesis. Here, the desired photonic crystal spatial profile is obtained through a Fourier relationship with the targeted modal frequency shifts, where each modal shift is determined based on the corresponding effective index modulation of the ring. Experimentally, we demonstrate several distinct dispersion profiles over dozens of modes in transverse magnetic polarization. In contrast, we find that the transverse electric polarization requires a more advanced model that accounts for the discontinuity of the field at the modulated interface. Finally, we present simulations showing arbitrary frequency comb spectral envelope tailoring using our Frequency synthesis approach.
Two band model for coherent excitonic condensates
Creators: name: Apinyan, V.
name: Kopeć, T. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider the excitonic correlations in the two band solid state system composed of the valence band and conduction band electrons. We treat the phase coherence mechanism in the system by presenting the electron operator as a fermion attached to the U(1) phase-flux tube. The emergent bosonic gauge field, related to the phase variables appears to be crucial for the coherent Bose-Einstein condensation (BEC) of excitons. We calculate the normal excitonic Green functions, and the single-particle density of states functions being a convolution between bosonic and fermionic counterparts. We obtain the total density of states (DOS) as a sum of two independent parts. For the coherent normal fermionic DOS, there is no hybridization-gap found in the system due to strong coherence effets and phase stiffness.
description: 4 pages, 3 figures. arXiv admin note: text overlap with arXiv:1508.00478
Die Bedeutung von wayyēḥālēq in Genesis 14,15 im Licht der komparativen Semitistik und der aramäischen Qumranschrift "Genesis Apokryphon" XXII,8ff
Creators: name: Mutius, Hans-Georg Von
Publisher: name: Biblische Notizen
Year: 1970

description: Biblische Notizen, Bd. 90 (1997): Biblische Notizen, Band 90
Characterizations of asymmetric truncated Toeplitz operators
Creators: name: Câmara, Cristina
name: Jurasik, Joanna
name: Kliś--Garlicka, Kamila
name: Ptak, Marek
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47B35, 30H10, 47A15

description: The aim of this paper is to investigate asymmetric truncated Toeplitz operators with $L^2$ symbols between two different model spaces given by inner functions such that one divides the other. Characterizations of these operators are given in terms of rank two operators. A description of the class of symbols for which the corresponding asymmetric truncated Toeplitz operator is equal to the zero operator is also given.
Memo Certifying Employment as Instructor
Creators: name: Ohio College Of Chiropody
name: University, Kent State
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Universities and colleges
valueUri: http://id.worldcat.org/fast/1161597
subject: Employment references
valueUri: http://id.worldcat.org/fast/909381
subject: Education
valueUri: http://id.worldcat.org/fast/902499
subject: Preuss, Siegfried
subject: Medical colleges
valueUri: http://id.worldcat.org/fast/1013952

description: Memo certifying that Fred S. Preuss was an instructor in histology at the Ohio College of Chiropody from September 1941 to June 1942. Signed by Dean M. S. Harmolin.
Optimal Mechanism Design for Agents with DSL Strategies: The Case of Sybil Attacks in Combinatorial Auctions
Creators: name: Gafni, Yotam
name: Tennenholtz, Moshe
Publisher: name: arXiv
Year: 2022
Subjects: subject: Theoretical Economics (econ.TH)
subject: FOS: Economics and business

description: In robust decision making under uncertainty, a natural choice is to go with safety (aka security) level strategies. However, in many important cases, most notably auctions, there is a large multitude of safety level strategies, thus making the choice unclear. We consider two refined notions: (i) a term we call DSL (distinguishable safety level), and is based on the notion of ``discrimin'', which uses a pairwise comparison of actions while removing trivial equivalencies. This captures the fact that when comparing two actions an agent should not care about payoffs in situations where they lead to identical payoffs. (ii) The well-known Leximin notion from social choice theory, which we apply for robust decision-making. In particular, the leximin is always DSL but not vice-versa. We study the relations of these notions to other robust notions, and illustrate the results of their use in auctions and other settings. Economic design aims to maximize social welfare when facing self-motivated participants. In online environments, such as the Web, participants' incentives take a novel form originating from the lack of clear agent identity -- the ability to create Sybil attacks, i.e., the ability of each participant to act using multiple identities. It is well-known that Sybil attacks are a major obstacle for welfare-maximization. Our main result proves that when DSL attackers face uncertainty over the auction's bids, the celebrated VCG mechanism is welfare-maximizing even under Sybil attacks. Altogether, our work shows a successful fundamental synergy between robustness under uncertainty, economic design, and agents' strategic manipulations in online multi-agent systems.
description: In Proceedings TARK 2023, arXiv:2307.04005
Investigation of numerical methods for simulating three dimensional problems in rolling
Creators: name: Kin., Chung Wing
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Multimode Brownian oscillators: Exact solutions to heat transport
Creators: name: Tong, Xin-Hai
name: Gong, Hong
name: Wang, Yao
name: Xu, Rui-Xue
name: Yan, YiJing
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this work, we investigate the multimode Brownian oscillators in nonequilibrium scenarios with multiple reservoirs at different temperatures. For this purpose, an algebraic method is proposed. This approach gives the exact time-local equation of motion for reduced density operator, from which we can easily extract not only the reduced system but also hybrid bath dynamical information. The resulted steady-state heat current is found numerically consistent with another discrete imaginary-frequency method followed by the Meir-Wingreen's formula. It is anticipated that the development in this work would constitute an indispensable component to nonequilibrium statistical mechanics for open quantum systems.
description: Newest version
Assessment of Challenges of Pharmaceutical Supply Chain in Public Hospital and Health Center in Addis Ababa, Ethiopia
Creators: name: Nega, Mekuwanint
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The challenges of pharmaceutical supply chain developing an objective of challenges leading to stock out and what challenges are affecting the pharmaceutical supply chain activities for minimize the interruption of supplies that was important for health facility. Tracking challenges of the pharmaceutical supply chain is important. The aim of this study was to assess the pharmaceutical supply chain system of health centers and hospitals in Addis Ababa. The research conducted using both quantitative and qualitative approach of research methods and descriptive types of research using structured questionnaire collected data from sampled Addis Ababa health centers and hospitals. There are different challenges of pharmaceutical supply chain that lead for the stock outs. Integration of pharmaceuticals were no full supply from suppliers, forecasting disorganization for demand estimation, procurement poor coordination and there was stock out at least 12 months were high. LMIS was uncoordinated, no enough space of store capacity and problem of transportation those factors contribute for the stock out of pharmaceuticals. In pharmaceutical supply chain activities have different challenges for decreasing the interruption of pharmaceuticals. Challenges related to pharmaceutical supply integration of the health facility and the suppliers and planning the goals with suppliers and managing the supplier relation and develop capacity of supply planning from the production or manufacturer to the end user to facility. Forecasting process and acquiring of the pharmaceutical from the supplier in the requested quantity were challenging for the health facility and some information of the supply pipe line was not monitored and does not known so the probability of stock out were high. Decrease wastage of pharmaceuticals and prevent stock out in health facility it was one area of challenging that stock outs are occurred and emergency orders were placed decreasing those challenges increase the availability of pharmaceutical. Minimizing challenges of pharmaceutical activities of the supply chain improves the consistence of pharmaceutical supplies and decreases interruption of services in the health facility
Specificity-determining DNA triplet code for positioning of human pre-initiation complex
Creators: name: Goldshtein, Matan
name: Lukatsky, David B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biomolecules (q-bio.BM)
subject: Genomics (q-bio.GN)
subject: Molecular Networks (q-bio.MN)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: The notion that transcription factors bind DNA only through specific, consensus binding sites has been recently questioned. In a pioneering study by Pugh and Venters no specific consensus motif for the positioning of the human pre-initiation complex (PIC) has been identified. Here, we reveal that nonconsensus, statistical, DNA triplet code provides specificity for the positioning of the human PIC. In particular, we reveal a highly non-random, statistical pattern of repetitive nucleotide triplets that correlates with the genome-wide binding preferences of PIC measured by Chip-exo. We analyze the triplet enrichment and depletion near the transcription start site (TSS) and identify triplets that have the strongest effect on PIC-DNA nonconsensus binding. Our results constitute a proof-of-concept for a new design principle for protein-DNA recognition in the human genome, which can lead to a better mechanistic understanding of transcriptional regulation.
Observation of many-body Fock space dynamics in two dimensions
Creators: name: Yao, Yunyan
name: Xiang, Liang
name: Guo, Zexian
name: Bao, Zehang
name: Yang, Yong-Feng
name: Song, Zixuan
name: Shi, Haohai
name: Zhu, Xuhao
name: Jin, Feitong
name: Chen, Jiachen
name: Xu, Shibo
name: Zhu, Zitian
name: Shen, Fanhao
name: Wang, Ning
name: Zhang, Chuanyu
name: Wu, Yaozu
name: Zou, Yiren
name: Zhang, Pengfei
name: Li, Hekang
name: Wang, Zhen
name: Song, Chao
name: Cheng, Chen
name: Mondaini, Rubem
name: Wang, H.
name: You, J. Q.
name: Zhu, Shi-Yao
name: Ying, Lei
name: Guo, Qiujiang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Quantum many-body simulation provides a straightforward way to understand fundamental physics and connect with quantum information applications. However, suffering from exponentially growing Hilbert space size, characterization in terms of few-body probes in real space is often insufficient to tackle challenging problems such as quantum critical behavior and many-body localization (MBL) in higher dimensions. Here, we experimentally employ a new paradigm on a superconducting quantum processor, exploring such elusive questions from a Fock space view: mapping the many-body system onto an unconventional Anderson model on a complex Fock space network of many-body states. By observing the wave packet propagating in Fock space and the emergence of a statistical ergodic ensemble, we reveal a fresh picture for characterizing representative many-body dynamics: thermalization, localization, and scarring. In addition, we observe a quantum critical regime of anomalously enhanced wave packet width and deduce a critical point from the maximum wave packet fluctuations, which lend support for the two-dimensional MBL transition in finite-sized systems. Our work unveils a new perspective of exploring many-body physics in Fock space, demonstrating its practical applications on contentious MBL aspects such as criticality and dimensionality. Moreover, the entire protocol is universal and scalable, paving the way to finally solve a broader range of controversial many-body problems on future larger quantum devices.
description: 8 pages, 4 figures + supplementary information
Generating Function Transformations Related to Polylogarithm Functions and the $k$-Order Harmonic Numbers
Creators: name: Schmidt, Maxie D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We define a new class of generating function transformations related to polylogarithm functions, Dirichlet series, and Euler sums. These transformations are given by an infinite sum over the $j^{th}$ derivatives of a sequence generating function and sets of generalized coefficients satisfying a non-triangular recurrence relation in two variables. The generalized transformation coefficients share a number of analogous properties with the Stirling numbers of the second kind and the known harmonic number expansions of the unsigned Stirling numbers of the first kind. We prove a number of properties of the generalized coefficients which lead to new recurrence relations and summation identities for the $k$-order harmonic number sequences. Other applications of the generating function transformations we define in the article include new series expansions for the polylogarithm function, the alternating zeta function, and the Fourier series for the periodic Bernoulli polynomials. We conclude the article with a discussion of several specific new "almost" linear recurrence relations between the integer-order harmonic numbers and the generalized transformation coefficients, which provide new applications to studying the limiting behavior of the zeta function constants, $ζ(k)$, at integers $k \geq 2$.
Free-form three dimensional object recognition
Creators: name: Chua., Chin Seng
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Ground state degeneracy of the Ising cage-net model
Creators: name: Ma, Xiuqi
name: Malladi, Ananth
name: Wang, Zongyuan
name: Wang, Zhenghan
name: Chen, Xie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Ising cage-net model, first proposed in Phys. Rev. X 9, 021010 (2019), is a representative type I fracton model with nontrivial non-abelian features. In this paper, we calculate the ground state degeneracy of this model and find that, even though it follows a similar coupled layer structure as the X-cube model, the Ising cage-net model cannot be "foliated" in the same sense as X-cube as defined in Phys. Rev. X 8, 031051 (2018). A more generalized notion of "foliation'' is hence needed to understand the renormalization group transformation of the Ising cage-net model. The calculation is done using an operator algebra approach that we develop in this paper, and we demonstrate its validity through a series of examples.
Nonlinear magnetotransport in a two-dimensional system with merging Dirac points
Creators: name: Pal, Ojasvi
name: Dey, Bashab
name: Ghosh, Tarun Kanti
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the linear, second-order nonlinear (NL) current and voltage responses of a two-dimensional gapped semi-Dirac system with merging Dirac nodes along the $x$ direction under the influence of a weak magnetic field ($B$), using the semiclassical Boltzmann formalism. We investigate the effect of band geometric quantities like Berry curvature and orbital magnetic moment in the responses up to linear order in $B$. We derive exact analytical expressions of the linear magnetoconductivities, second-harmonic NL anomalous Hall (NAH), and anomalous velocity and Lorentz force induced (NAL) conductivities, unveiling their dependence on Fermi energy and a gap parameter $δ_0$. For $δ_0 > 0$, the Fermi surface topology changes at a particular Fermi energy, which is reflected in the nature of conductivities through a kink. The ratio of NAL and NAH conductivities is found to be independent of $δ_0$ and inversely related to Fermi energy. The NL dc current exhibits distinct orientations depending on the Fermi energy, magnetic field, polarization of the electromagnetic wave. In the presence of magnetic field, the NL dc current vector can be rotated through large angles on variation of Fermi energy. For high Fermi energies, the NL dc current is directed nearly along the $y$-axis for $x$-polarized and low-frequency circularly polarized light, whereas it aligns close to $x$-axis for high-frequency circularly polarized light. These orientations of the NL dc current are predominantly governed by the mirror symmetry of the system along the $x$ direction. Additionally, we also study the NL voltage responses of the system by applying current along the $x$ and $y$ directions. The system exhibits asymmetry in the $B$-dependencies of the NL resistivities, which may serve as an experimentally relevant signature for band geometric quantities and merging Dirac nodes in such systems.
Differential Privacy and Econometric Methods
Creators: name: Rollins, Caleb
Publisher: name: University of Chicago
Year: 2022
Subjects: subject: Differential Privacy
subject: Econometrics
subject: FOS: Economics and business

description: Differential privacy is an emerging topic in Economics that has just recently started to gain more attention. In my thesis, I am trying to answer can econometric estimates be preserved when estimation is performed on differentially private synthetic data? While most current approaches to differential privacy in causal inference focus on making specific estimators differentially private, my approach will make synthetic data that is differentially private, so any estimator can be applied to this synthetic data. I will do this using generative adversarial networks (GANs). In doing so, I will also explore other differentially private methods for econometric estimators, as well as explore ways to achieve consistent standard errors when reporting these estimators.
The Productivity of Tax System in Ethiopia (1961-2005)
Creators: name: Tofu, Tegegn
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2008

description: This study evaluates the productivity of the tax system in Ethiopia for the period 1961-2005. It examines the role played by elasticity and discretionary tax measures in the government's efforts to reduce the budget deficit, and measures the income elasticity of the tax system by decomposing elasticity into tax-to-base and base-to-income elasticities. The analysis shows that tax revenue tend to be inelastic with respect to changes in tax base. It is estimated that the tax-to-base elasticity is relatively lower than the base-to-income elasticities. The relatively low tax-to-base elasticity may be explained by inefficient and poor tax administration and the existence of exemptions. A result of economic regression also indicates that the major tax categories together with the overall tax system possess a buoyancy coefficient that exceeds their respective elasticity coefficients. The study makes policy recommendations in the direction of improved response of tax-to-base, improved alignment of taxes, and establishment of a strong tax administration, reducing exemption and broadening the tax base.
Letter to Israel Davidsohn
Creators: name: Hatch, H. Ray
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Employment references
valueUri: http://id.worldcat.org/fast/909381
subject: Education
valueUri: http://id.worldcat.org/fast/902499
subject: Medical colleges
valueUri: http://id.worldcat.org/fast/1013952
subject: Universities and colleges
valueUri: http://id.worldcat.org/fast/1161597
subject: Preuss, Siegfried

description: Recommendation letter regarding Preuss. Dr. Israel Davidsohn states had been with them shortly after his arrival from Germany in 1938. Davidson was the director of laboratories at the Mount Sinai Hospital in Chicago. Discusses Preuss' positive character qualities and also notes his good health. States that he is particularly adapted for the laboratory specialties. Signed by Dean H. Ray Hateh, who was a surgeon in Idaho Falls.
Minimal decoherence from inflation
Creators: name: Burgess, C. P.
name: Holman, R.
name: Kaplanek, Greg
name: Martin, Jerome
name: Vennin, Vincent
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We compute the rate with which super-Hubble cosmological fluctuations are decohered during inflation, by their gravitational interactions with unobserved shorter-wavelength scalar and tensor modes. We do so using Open Effective Field Theory methods, that remain under control at the late times of observational interest, contrary to perturbative calculations. Our result is minimal in the sense that it only incorporates the self-interactions predicted by General Relativity in single-clock models (additional interaction channels should only speed up decoherence). We find that decoherence is both suppressed by the first slow-roll parameter and by the energy density during inflation in Planckian units, but that it is enhanced by the volume comprised within the scale of interest, in Hubble units. This implies that, for the scales probed in the Cosmic Microwave Background, decoherence is effective as soon as inflation proceeds above $\sim 5\times 10^{9}$ GeV. Alternatively, if inflation proceeds at GUT scale decoherence is incomplete only for the scales crossing out the Hubble radius in the last ~ 13 e-folds, of inflation. We also compute how short-wavelength scalar modes decohere primordial tensor perturbations, finding a faster rate unsuppressed by slow-roll parameters. Identifying the parametric dependence of decoherence, and the rate at which it proceeds, helps suggest ways to look for quantum effects.
description: 31 pages + appendices, 7 figures
Adaptive Down-Sampling and Dimension Reduction in Time Elastic Kernel Machines for Efficient Recognition of Isolated Gestures
Creators: name: Marteau, Pierre-François
name: Gibet, Sylvie
name: Reverdy, Clément
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In the scope of gestural action recognition, the size of the feature vector representing movements is in general quite large especially when full body movements are considered. Furthermore, this feature vector evolves during the movement performance so that a complete movement is fully represented by a matrix M of size DxT , whose element M i, j represents the value of feature i at timestamps j. Many studies have addressed dimensionality reduction considering only the size of the feature vector lying in R D to reduce both the variability of gestural sequences expressed in the reduced space, and the computational complexity of their processing. In return, very few of these methods have explicitly addressed the dimensionality reduction along the time axis. Yet this is a major issue when considering the use of elastic distances which are characterized by a quadratic complexity along the time axis. We present in this paper an evaluation of straightforward approaches aiming at reducing the dimensionality of the matrix M for each movement, leading to consider both the dimensionality reduction of the feature vector as well as its reduction along the time axis. The dimensionality reduction of the feature vector is achieved by selecting remarkable joints in the skeleton performing the movement, basically the extremities of the articulatory chains composing the skeleton. The temporal dimen-sionality reduction is achieved using either a regular or adaptive down-sampling that seeks to minimize the reconstruction error of the movements. Elastic and Euclidean kernels are then compared through support vector machine learning. Two data sets 1 that are widely referenced in the domain of human gesture recognition, and quite distinctive in terms of quality of motion capture, are used for the experimental assessment of the proposed approaches. On these data sets we experimentally show that it is feasible, and possibly desirable, to significantly reduce simultaneously the size of the feature vector and the number of skeleton frames to represent body movements while maintaining a very good recognition rate. The method proves to give satisfactory results at a level currently reached by state-of-the-art methods on these data sets. We experimentally show that the computational complexity reduction that is obtained makes this approach eligible for real-time applications.
An Assessment Of Reverse Logistics: The Case Of Sur Construction Plc
Creators: name: G/hiwot, Solomon
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Reverse logistics is the management of the end life of product and has advantages like improvement of competitiveness, regaining values, positive environmental impact and better image for an organization. It is also a new field compared to conventional or forward logistics. As a result utilization of reverse logistics in organization like Sur Construction PLC to lesser compare to forward logistics. Some of the main problem of the company related to reverse logistics was absence of recovery like remanufacturing, lack of official management or formal return and controlling system for used materials and lack of proper disposal system in the organization simply consider all returns as scrap and forward to bid of second hand market. As result the thesis aim to assess reverse logistics in terms of its drivers, process, activities to identify the opportunities and challenges in the organization and provide practical remedy to the organization. The study applied descriptive research design and a sample of 66 was used to represent population of 200 and gathered both qualitative from stratified random sampling using probability proportional allocation from each stratum and quantitative data a applied both combination of convenience and purposive. Data was analyzed using Statistical Package for Social Sciences and Microsoft-excel percentages, frequency tables, used to carry out those descriptive statistical analyses. The study found that the organization had the opportunity of massive used material generated from spare parts, tyre and other packages and scraps organized informally without proper documents and with mind setup of the second hand market and poor in recovering especially remanufacturing and disposal like land filling and incineration. The main challenges to adopt Reverse logistics in the company were top management commitment and management style, weak linkage with local manufacturing and wrong perception to local product (judge as poor quality). Finally, the researcher recommends to incorporate reverse logistics in the organization structure, waste material (that couldn't recover) apply proper disposal method like land filling and incineration especially for those toxic materials like drained oil from thousands of construction equipment's, and for better recovery (remanufacturing) either the company has to own its own remanufacturing workshop like recapping machine for tyre or form strong linkage with local manufacturer in addition to adjustment of workers mindset up to local products.
Optimizing the depth of variational quantum algorithms is strongly QCMA-hard to approximate
Creators: name: Bittel, Lennart
name: Gharibian, Sevag
name: Kliesch, Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Variational Quantum Algorithms (VQAs), such as the Quantum Approximate Optimization Algorithm (QAOA) of [Farhi, Goldstone, Gutmann, 2014], have seen intense study towards near-term applications on quantum hardware. A crucial parameter for VQAs is the \emph{depth} of the variational ``ansatz'' used -- the smaller the depth, the more amenable the ansatz is to near-term quantum hardware in that it gives the circuit a chance to be fully executed before the system decoheres. In this work, we show that approximating the optimal depth for a given VQA ansatz is intractable. Formally, we show that for any constant $ε>0$, it is QCMA-hard to approximate the optimal depth of a VQA ansatz within multiplicative factor $N^{1-ε}$, for $N$ denoting the encoding size of the VQA instance. (Here, Quantum Classical Merlin-Arthur (QCMA) is a quantum generalization of NP.) We then show that this hardness persists in the even ``simpler'' QAOA-type settings. To our knowledge, this yields the first natural QCMA-hard-to-approximate problems.
description: 31 pages, 2 figures
An abelian quotient of the symplectic derivation Lie algebra of the free Lie algebra
Creators: name: Morita, Shigeyuki
name: Sakasai, Takuya
name: Suzuki, Masaaki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: Primary 20F28, Secondary 20J06, 17B40

description: We construct an abelian quotient of the symplectic derivation Lie algebra $\mathfrak{h}_{g,1}$ of the free Lie algebra generated by the fundamental representation of $\mathrm{Sp}(2g,\mathbb{Q})$. More specifically, we show that the weight $12$ part of the abelianization of $\mathfrak{h}_{g,1}$ is $1$-dimensional for $g \ge 8$. The computation is done with the aid of computers.
description: 20 pages
Coupling Protonation States of Acid-Sensing Ion Channels to Dynamics and Function
Creators: name: Miaro, Megan
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2022
Subjects: Acid-sensing ion channels

description: Acid-sensing ion channels (ASICs) are trimeric, sodium-selective proton-gated ion channels. Having ligands as small as protons presents a challenge when studying the structure-function relationships of pH-dependent gating. Knowing where protons must bind to evoke a pH-dependent conformational change related to gating would provide one with insights into the molecular mechanisms underlying pH-dependent function in ASICs. We use molecular dynamics (MD) simulations that allow us to model explicit protons and directly examine the effects of changing protonation states on ASIC1 dynamics. We first combine the use of unbiased MD simulations with pKₐ prediction on the three functional states of cASIC1 to identify the effects of protonation state changes on interactions between ionizable residues in the acidic pocket (ACP), a region rich in acidic residues in the protein that plays a role in pH-sensing. We interpret the importance of E98, a buried residue in the ACP with a highly shifted pKₐ value, as well as the positively charged R191, also in the ACP, which has a flexible side chain and can interact with multiple negatively charged side chains, and the role of these residues in the pH-dependent collapse of the ACP. Additionally, we identify a hydrogen-bond network in the palm domain that consists of the Q277 side chain that interacts with the E80 side chain and L414 backbone carbonyl. This network contributes to a stable desensitized state and is stabilized by an E80-/E412H/E417H protonation configuration. Next, targeted MD was combined with pKₐ prediction to simulate the full transition pathways and to link protonation states with the molecular mechanisms involved in conformational changes. Our results suggest four residues, E98, E314, H328, and E374, that may be important in pH-sensing and gating, and that require further functional investigation in the context of activation and desensitization. This research exemplifies how MD is a useful tool in studying how protonation directly affects the structural dynamics of a protein and how it can complement existing functional studies and be used to suggest future experimental investigations.
The determinants of Domestic air transport demand in Ethiopia
Creators: name: Sofany, Amanuel
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The main objective of this study is to investigate the determinants of Domestic air transport demand in Ethiopia during the period 2000/2001-2013/2014. The Autoregressive Distributed Lag Approach to Co-integration and Error Correction Model are applied in order to investigate the long-run and short-run relationship between the domestic passengers and its determinants. The finding of the Bounds test shows that there is a stable long run relationship between number of Domestic revenue passenger, income, airfare, price of competing services (Buses), road length and population. The empirical results reveal that income, price of competing services and population are found to have positive impact on the domestic air transport. However, Yield has negative impact on the domestic air transport. In the short run, the coefficient of error correction term is -0.62 suggesting about 62 percent annual adjustment towards long run equilibrium. This is another proof for the existence of a stable long run relationship among the variables. The estimated coefficients of the short-run model indicate that population, income and airfare are the main contributor to the domestic air transport demand. This study has also an important policy implication. The findings of this study imply that domestic air transport demand can be improved significantly when the price of competing service, population and income increases and airfare decreases. Hence the governmental organizations (Ethiopian Civil aviation authority, Ethiopian Airports Enterprise & Ethiopian Airlines) should have an integrated plan to optimize the benefit obtained through the development of the national economy and the population growth
Tailored Presolve Techniques in Branch-and-Bound Method for Fast Mixed-Integer Optimal Control Applications
Creators: name: Quirynen, Rien
name: Di Cairano, Stefano
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Mixed-integer model predictive control (MI-MPC) can be a powerful tool for modeling hybrid control systems. In case of a linear-quadratic objective in combination with linear or piecewise-linear system dynamics and inequality constraints, MI-MPC needs to solve a mixed-integer quadratic program (MIQP) at each sampling time step. This paper presents a collection of block-sparse presolve techniques to efficiently remove decision variables, and to remove or tighten inequality constraints, tailored to mixed-integer optimal control problems (MIOCP). In addition, we describe a novel heuristic approach based on an iterative presolve algorithm to compute a feasible but possibly suboptimal MIQP solution. We present benchmarking results for a C code implementation of the proposed BB-ASIPM solver, including a branch-and-bound (B&B) method with the proposed tailored presolve techniques and an active-set based interior point method (ASIPM), compared against multiple state-of-the-art MIQP solvers on a case study of motion planning with obstacle avoidance constraints. Finally, we demonstrate the computational performance of the BB-ASIPM solver on the dSPACE Scalexio real-time embedded hardware using a second case study of stabilization for an underactuated cart-pole with soft contacts.
description: 28 pages, 7 figures, 2 tables, published in journal of Optimal Control Applications and Methods
ALMA Reveals Weak [NII] Emission in "Typical" Galaxies and Intense Starbursts at z=5-6
Creators: name: Pavesi, Riccardo
name: Riechers, Dominik A.
name: Capak, Peter L.
name: Carilli, Christopher L.
name: Sharon, Chelsea E.
name: Stacey, Gordon J.
name: Karim, Alexander
name: Scoville, Nicholas Z.
name: Smolcic, Vernesa
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report interferometric measurements of [NII] 205 um fine-structure line emission from a representative sample of three galaxies at z=5-6 using the Atacama Large (sub)Millimeter Array (ALMA). These galaxies were previously detected in [CII] and far-infrared continuum emission and span almost two orders of magnitude in star formation rate (SFR). Our results show at least two different regimes of ionized inter-stellar medium properties for galaxies in the first billion years of cosmic time, separated by their L_[CII]/L_[NII] ratio. We find extremely low [NII] emission compared to [CII] (L_ [CII]/L_[NII]=68 [+200/-28]) from a "typical" L*_UV star-forming galaxy, likely directly or indirectly (by its effect on the radiation field) related to low dust abundance and low metallicity. The infrared-luminous modestly star-forming Lyman Break Galaxy (LBG) in our sample is characterized by an ionized-gas fraction (L_[CII]/L_[NII]<=20) typical of local star-forming galaxies and shows evidence for spatial variations in its ionized-gas fraction across an extended gas reservoir. The extreme SFR, warm and compact dusty starburst AzTEC-3 shows an ionized fraction higher than expected given its star-formation rate surface density (L_[CII]/L_[NII]=22+/-8) suggesting that [NII] dominantly traces a diffuse ionized medium rather than star-forming HII regions in this type of galaxy. This highest redshift sample of [NII] detections provides some of the first constraints on ionized and neutral gas modeling attempts and on the structure of the inter-stellar medium at z=5-6 in "normal" galaxies and starbursts.
description: 12 pages, 5 figures, 2 tables, to appear in ApJ (accepted September 15, 2016)
My Link to the past: expanding conceptions of girlhood play with the Zelda franchise
Creators: name: Doran, Kacey
Publisher: name: No Publisher Supplied
Year: 2022

description: This dissertation contextualizes young people’s experiences with and women’s nostalgic memories of videogames from the highly acclaimed Legend of Zelda series through looking at the videogames themselves and beyond them to licensed materials and fanart. My intervention heeds girlhood studies scholars Clare Bradford and Mavis Reimer’s call for interdisciplinary mixed methodology. By adding examinations of Zelda visual and material culture, my methodology expands on gender and media studies scholar Valerie Walkerdine’s praxis connecting young people’s gendered experiences of videogames with their gameplay and sociality. Finally, my work furthers artist and videogame historian Rachel Simone Weil’s conversation surrounding the misogynistic exclusivity of retro videogame revival nostalgia. I actively work against reifying the gender and age segregation of past historical videogame accounts with this dissertation through expanding possibilities of children’s videogame play by illustrating how sociality, play outside of gaming, and visual and material culture functioned together as part of Zelda gaming experiences and women’s continuing connection to them.
Video coding using three-dimensional subband approach
Creators: name: Chooi., Weng Leong
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Migration and Household Income Diversification; the Case of Hetosa District, In Oromia Region
Creators: name: Alemu, Asnakech
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: This paper uses limited-dependent variable methods and new data from Hetosa district to test the effect of intercontinental on activity choice and incomes in rural households. Econometric evidence supports our theoretical expectation that the impact of emigration varies both by migrant destination and production activity. We find no evidence of either positive or negative effects of continental migration on any activity because of all migrants are intercontinental migrants. However, intercontinental migration, which tends to be long term and generates significantly larger remittances, stimulates livestock production and cash crop while being negatively associated with non-farm activities income and positive associated with crop production but not significant .policy recommendation is very important to continuous the effect of migrant on income diversification i.e on livestock and cash crop production promotion of production working on infrastructure and search of ground water for irrigation is most policy recommended to district.
On the radial velocity detection of additional planets in transiting, slowly rotating M-dwarf systems: the case of GJ 1132
Creators: name: Cloutier, Ryan
name: Doyon, René
name: Menou, Kristen
name: Delfosse, Xavier
name: Dumusque, Xavier
name: Artigau, Étienne
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: M-dwarfs are known to commonly host high-multiplicity planetary systems. Therefore M-dwarf planetary systems with a known transiting planet are expected to contain additional small planets ($r_p \le 4$ R$_{\oplus}$, $m_p \lesssim 20$ M$_{\oplus}$) that are not seen in transit. In this study we investigate the effort required to detect such planets using precision velocimetry around the sizable subset of M-dwarfs which are slowly rotating ($P_{\mathrm{rot}} \gtrsim 40$ days) and hence more likely to be inactive. We focus on the test case of GJ 1132. Specifically, we perform a suite of Monte-Carlo simulations of the star's radial velocity signal featuring astrophysical contributions from stellar jitter due to rotationally modulated active regions and keplarian signals from the known transiting planet and hypothetical additional planets not seen in transit. We then compute the detection completeness of non-transiting planets around GJ 1132 and consequently estimate the number of RV measurements required to detect those planets. We show that with 1 m s$^{-1}$ RV precision per measurement, only $\sim 50$ measurements are required to achieve a 50\% detection completeness to all non-transiting planets in the system and to planets which are potentially habitable. Throughout we advocate the use of Gaussian process regression as an effective tool for mitigating the effects of stellar jitter including stars with high activity. Given that GJ 1132 is representative of a large population of slowly rotating M-dwarfs, we conclude with a discussion of how our results may be extended to other systems with known transiting planets such as those which will be discovered with TESS.
description: 19 pages (15 pages before appendices), 12 figures, 2 tables, accepted for publication in The Astronomical Journal
A fundamental study of copper cementation as a method of recovering gold from dilute gold thiosulfate solutions
Creators: name: Lit., Choo Wei
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Tunneling induced spin dynamics in a quantum dot-lead hybrid system
Creators: name: Otsuka, Tomohiro
name: Nakajima, Takashi
name: Delbecq, Matthieu R.
name: Amaha, Shinichi
name: Yoneda, Jun
name: Takeda, Kenta
name: Allison, Giles
name: Stano, Peter
name: Noiri, Akito
name: Ito, Takumi
name: Loss, Daniel
name: Ludwig, Arne
name: Wieck, Andreas D.
name: Tarucha, Seigo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Semiconductor quantum dots (QDs) offer a platform to explore the physics of quantum electronics including spins. Electron spins in QDs are considered good candidates for quantum bits in quantum information processing, and spin control and readout have been established down to a single electron level. We use these techniques to explore spin dynamics in a hybrid system, namely a QD coupled to a two dimensional electronic reservoir. The proximity of the lead results in relaxation dynamics of both charge and spin, the mechanism of which is revealed by comparing the charge and spin signal. For example, higher order charge tunneling events can be monitored by observing the spin. We expect these results to stimulate further exploration of spin dynamics in QD-lead hybrid systems and expand the possibilities for controlled spin manipulations.
description: 5 pages, 4 figures