cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Bianchi II with time varying constants. Self-similar approach
Creators: name: Belinchón, José Antonio
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study a perfect fluid Bianchi II models with time varying constants under the self-similarity approach. In the first of the studied model, we consider that only vary $G$ and $Λ.$ The obtained solution is more general that the obtained one for the classical solution since it is valid for an equation of state $ω\in(-1,\infty) $ while in the classical solution $ω\in(-1/3,1) .$ Taking into account the current observations, we conclude that $G$ must be a growing time function while $Λ$ is a positive decreasing function. In the second of the studied models we consider a variable speed of light (VSL). We obtain a similar solution as in the first model arriving to the conclusions that $c$ must be a growing time function if $Λ$ is a positive decreasing function.
description: 10 pages. RevTeX4
Implementation of Multi-Core Processor Based on PLASMA (Most MIPS I) IP Core
Creators: name: Gruevski, Bojan
name: Tentov, Aristotel
name: Kalendar, Marija
Publisher: name: Hochschule Anhalt
Year: 2014
Subjects: subject: 004: Datenverarbeitung, Informatik

description: Proceedings of 2nd International Conference on Applied Innovations in IT / Prof. Dr. Siemens, Eduard (2014). Jg. 2. Köthen, 2014, S. 29-35
description: Multi-core processors is a design philosophy that has become mainstream in scientific and engineering applications. Increasing performance and gate capacity of recent FPGA devices has permitted complex logic systems to be implemented on a single programmable device. By using VHDL here we present an implementation of one multi-core processor by using the PLASMA IP core based on the (most) MIPS I ISA and give an overview of the processor architecture and share theexecution results.
Tuning surface metallicity and ferromagnetism by hydrogen adsorption at the polar ZnO(0001) surface
Creators: name: Sanchez, N.
name: Gallego, S.
name: Cerdá, J.
name: Muñoz, M. C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The adsorption of hydrogen on the polar Zn-ended ZnO(0001) surface has been investigated by density functional {\it ab-initio} calculations. An on top H(1x1) ordered overlayer with genuine H-Zn chemical bonds is shown to be energetically favorable. The H covered surface is metallic and spin-polarized, with a noticeable magnetic moment at the surface region. Lower hydrogen coverages lead to strengthening of the H-Zn bonds, corrugation of the surface layer and to an insulating surface. Our results explain experimental observations of hydrogen adsorption on this surface, and not only predict a metal-insulator transition, but primarily provide a method to reversible switch surface magnetism by varying the hydrogen density on the surface.
description: 4 pages, 3 figures
title: Real effects of the German Corporate Governance Code
title: Evidence from gender diversity and the comply-or-explain principle
titleType: AlternativeTitle
Creators: name: Ali, Irfan
Publisher: name: TU Dortmund
Year: 2024
Subjects: subject: Comply or explain principle
subject: Governance disclosures quality
subject: Corporate governance code
subject: Literature review
subject: Firm performance
subject: 330
subject: Deutschland
subject: Börsennotierte Aktiengesellschaft
subject: Corporate Governance
subject: Deutscher Corporate Governance Kodex
subject: Unternehmenserfolg

description: The "comply or explain" principle is at the core of corporate governance codes worldwide. It provides firms with the flexibility to either comply with the code's provisions or justify deviations. However, the absence of clear guidelines on the content of how managers should provide these explanations has led to low-quality, generic disclosures, as evident in empirical literature. This thesis comprehensively investigates the effectiveness of the comply-or-explain principle, along with firm-specific governance characteristics such as gender diversity. Our findings indicate that the comply-or-explain principle has several firm-level economic consequences, which vary across countries. The review finds consistent and positive impact for accounting choices and investment efficiency. Our empirical findings on governance disclosure quality show that high-quality information may negatively impact the firm performance of German prime listed firms. Further, different chapters of the code impact firm performance differently, with transparency and financial reporting chapters crucial for firms. Additionally, we also explore how gender diversity on German executive boards impacts corporate risk. The results reveal that that gender diversity significantly affects risk-taking behavior in German public firms. Overall, this thesis provides new insights into the interplay between disclosure quality and firm outcomes, and offers valuable implications for policymakers and practitioners.
Theoretical simulation and experimental verification of dynamic caustic manipulation using a deformable mirror for laser material processing
Creators: name: Smarra, Marco
name: Gurevich, Evgeny L.
name: Ostendorf, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The influence of a deformable mirror on spatial light modulation in ultrafast lasers processing is demonstrated. The deformable mirror was integrated into an optical setup which contains an additional lens for generating a nearly linear focus shift in the focal plane behind the f-theta lens. The deformation of the mirror surface can be described by the Zernike terms Defocus, Astigmatism, and a combination of both, resulting in a cylindric lens behavior. The influence of the mirror surface deformation in this optical setup on the intensity distribution in the focal plane was simulated. From the simulation results, the caustic in the focal plane was calculated. The simulation results were compared to experiments using a picosecond laser with a maximum pulse energy of about 60 $μ$J. We demonstrate that the initial astigmatism of the raw beam can be reduced using the deformable mirror. High linearity in the focus shift ($R^2 >98$%) and the generation of elliptical/ line intensity distributions are shown. Line intensity distribution was used to demonstrate slit drilling application in thin metal foils.
Intercalation of Mn in graphene/Cu(111) interface: insights to the electronic and magnetic properties from theory
Creators: name: Guo, Qilin
name: Dedkov, Yuriy
name: Voloshina, Elena
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of Mn intercalation on the atomic, electronic and magnetic structure of the graphene/Cu(111) interface is studied using state-of-the-art density functional theory calculations. Different structural models of the graphene-Mn-Cu(111) interface are investigated. While a Mn monolayer placed between graphene and Cu(111) (an unfavorable configuration) yields massive rearrangement of the graphene-derived $π$ bands in the vicinity of the Fermi level, the possible formation of a Cu$_2$Mn alloy at the interface (a favorable configuration) preserves the linear dispersion for these bands. The deep analysis of the electronic states around the Dirac point for the graphene/Cu$_2$Mn/Cu(111) system allows to discriminate between contributions from three carbon sublattices of a graphene graphene layer in this system and to explain the bands' as well as spins' topology of the electronic states around the Fermi level.
On Recognizable Languages of Infinite Pictures
Creators: name: Finkel, Olivier
Publisher: name: arXiv
Year: 2009
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Computational Complexity (cs.CC)
subject: Logic (math.LO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In a recent paper, Altenbernd, Thomas and Wöhrle have considered acceptance of languages of infinite two-dimensional words (infinite pictures) by finite tiling systems, with the usual acceptance conditions, such as the Büchi and Muller ones, firstly used for infinite words. The authors asked for comparing the tiling system acceptance with an acceptance of pictures row by row using an automaton model over ordinal words of length $ω^2$. We give in this paper a solution to this problem, showing that all languages of infinite pictures which are accepted row by row by Büchi or Choueka automata reading words of length $ω^2$ are Büchi recognized by a finite tiling system, but the converse is not true. We give also the answer to two other questions which were raised by Altenbernd, Thomas and Wöhrle, showing that it is undecidable whether a Büchi recognizable language of infinite pictures is E-recognizable (respectively, A-recognizable).
description: An erratum is added at the end of the paper: The supremum of the set of Borel ranks of B\"uchi recognizable languages of infinite pictures is not the first non recursive ordinal $\omega_1^{CK}$ but an ordinal $\gamma^1_2$ which is strictly greater than the ordinal $\omega_1^{CK}$. This follows from a result proved by Kechris, Marker and Sami (JSL 1989)
Astrometric Redshifts for Quasars
Creators: name: Kaczmarczik, Michael C.
name: Richards, Gordon T.
name: Mehta, Sajjan S.
name: Schlegel, David J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The wavelength dependence of atmospheric refraction causes differential chromatic refraction (DCR), whereby objects imaged at different optical/UV wavelengths are observed at slightly different positions in the plane of the detector. Strong spectral features induce changes in the effective wavelengths of broad-band filters that are capable of producing significant positional offsets with respect to standard DCR corrections. We examine such offsets for broad-emission-line (type 1) quasars from the Sloan Digital Sky Survey (SDSS) spanning 0
description: 29 pages, 13 figures (3 color); AJ, accepted
Implementation of Reed-Solomon RS (255,239) Code
Creators: name: Malenko, Maya
Publisher: name: Hochschule Anhalt
Year: 2014
Subjects: subject: 004: Datenverarbeitung, Informatik

description: Proceedings of 2nd International Conference on Applied Innovations in IT / Prof. Dr. Siemens, Eduard (2014). Jg. 2. Köthen, 2014, S. 43-48
description: In this paper the construction of Reed-Solomon RS(255,239) codeword is described and the process of coding and decoding a message is simulated and verified. RS(255,239), or its shortened version RS(224,208) is used as a coding technique in Low-Power Single Carrier (LPSC) physical layer, as described in IEEE 802.11ad standard. The encoder takes 239 8-bit information symbols, adds 16 parity symbols and constructs 255-byte codeword to be transmitted through wireless communication channel. RS(255,239) codeword is defined over Galois Field GF and is used for correcting upto 8 symbol errors. RS(255,239) code construction is fully implemented and Simulink test project is constructed for testing and analyzing purposes.
Decentralization and Criminal Gangs in El Salvador: Impacts on Municipal Finances and Local Economic Development
Creators: name: Eaton, Kent
name: Huanqui, Silvana
name: Larios, Jose
Publisher: name: Taylor & Francis
Year: 2024
Subjects: Cancer
Science Policy
Virology
Computational Biology

description: Recent literature has argued that decentralization can create new forms of leverage for criminal gangs, increasing their territorial presence and levels of violence. In this article we reverse the causal arrow and analyze how gangs affect the performance of decentralized institutions. We study the case of El Salvador, a country with the ubiquitous presence of gangs. We find that the higher presence of gangs reduced municipalities’ fiscal revenues, thereby increasing their dependence on transfers from the central government. This result is mostly driven by mid-size municipalities, as the effect is not significant for small and large municipalities. In addition to depressing revenues, gang presence was also associated with lower municipal spending and less service provision, effectively hollowing out municipal governance. The drop in municipal spending is particularly strong in capital spending and in small municipalities. The article also finds that gangs undermine economic activity – not just in the municipalities where they operate but through spill-over effects in neighboring jurisdictions as well.
М. Ягодинська. Дослідження могильника біля села Кордишів Шумського району Тернопільської області
Creators: name: Ягодинська, Марина
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 430101
subject: Archaeological science

description: Наукові записки Рівненського обласного краєзнавчого музею. Зб. наук. праць. Випуск XIIІ. Частина 1: Матеріали наукової конференції присвяченої 100-річчю від дня народження Ігоря Кириловича Свєшнікова. Рівне : Дятлик М., 2015
Discovery of the elusive thioketenylium, HCCS+, in TMC-1
Creators: name: Cabezas, C.
name: Agundez, M.
name: Marcelino, N.
name: Tercero, B.
name: Endo, Y.
name: Fuentetaja, R.
name: Pardo, J. R.
name: de Vicente, P.
name: Cernicharo, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the detection in TMC-1 of the cation HCCS+ (3Sigma-), which is the protonated form of the widespread radical CCS. This is the first time that a protonated radical has been detected in a cold dark cloud. Twenty-six hyperfine components from twelve rotational transitions have been observed with the Yebes 40m and IRAM 30m radio telescopes. We confidently assign the characteristic rotational spectrum pattern to HCCS+ based on the good agreement between the astronomical and theoretical spectroscopic parameters. The column density of HCCS+ is (1.1+/-0.1)e12 cm-2, and the CCS/HCCS+ abundance ratio is 50+/-10, which is very similar to that of CS/HCS+ (35+/-8) and CCCS/HCCCS+ (65+/-20). From a state-of-the-art gas-phase chemical model, we conclude that HCCS+ is mostly formed by reactions of proton transfer from abundant cations such as HCO+, H3O+, and H3+ to the radical CCS.
description: Accepted for publication in A&A Letters on December 21st
Jumps in current-voltage characteristics in disordered films
Creators: name: Altshuler, B. L.
name: Kravtsov, V. E.
name: Lerner, I. V.
name: Aleiner, I. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We argue that giant jumps of current at finite voltages observed in disordered samples of InO, TiN and YSi manifest a bistability caused by the overheating of electrons. One of the stable states is overheated and thus low-resistive, while the other, high-resistive state is heated much less by the same voltage. The bistability occurs provided that cooling of electrons is inefficient and the temperature dependence of the equilibrium resistance, R(T), is steep enough. We use experimental R(T) and assume phonon mechanism of the cooling taking into account its strong suppression by disorder. Our description of details of the I-V characteristics does not involve adjustable parameters and turns out to be in a quantitative agreement with the experiments. We propose experiments for more direct checks of this physical picture.
description: Final version, as published; 4 pages, 3 figures
Minimum and Living Wages in Jordan and Tunisia
Creators: name: Krafft, Caroline
name: Hannafi, Cyrine
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Mental Health

description: Countries around the world are working to develop social protection floors to help reduce poverty. Ensuring workers can earn adequate wages is an important component of social protection floors. In this paper, we explore who receives minimum, poverty, median, and living wages in Jordan, comparing 2010 and 2016, and in Tunisia in 2014. We demonstrate that while the majority of workers do earn at least minimum and poverty wages, only a minority of workers earn a living wage. The chances of earning minimum, poverty, median, and living wages depend on the characteristics of workplaces, specific work characteristics (especially job formality and skills required), and the demographic characteristics of workers. While results are consistent with wages reflecting, in part, workers’ productivity, they may also reflect rents, efficiency wages, and for minimum wages issues with enforceability and policy design. These findings highlight which workers are vulnerable to low earnings and where greater enforcement or redesign of minimum wage legislation might be needed.
Semantically enriched spatial modelling of industrial indoor environments enabling location-based services
Creators: name: Wendt, Arne
name: Brand, Michael
name: Schüppstuhl, Thorsten
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper presents a concept for a software system called RAIL representing industrial indoor environments in a dynamic spatial model, aimed at easing development and provision of location-based services. RAIL integrates data from different sensor modalities and additional contextual information through a unified interface. Approaches to environmental modelling from other domains are reviewed and analyzed for their suitability regarding the requirements for our target domains; intralogistics and production. Subsequently a novel way of modelling data representing indoor space, and an architecture for the software system are proposed.
description: 3. Kongresses Montage Handhabung Industrieroboter MHI
Motherhood Penalty Revisited: Impacts of Maternity Leave Mandates on Nature of Employment Contracts
Creators: name: Bose, Saheli
name: Chatterjee, Somdeep
Publisher: name: Taylor & Francis
Year: 2024
Subjects: Pharmacology
Biotechnology
Mathematical Sciences not elsewhere classified

description: In this paper we study the extension of paid maternity leave from 12 weeks to 26 weeks in India to estimate its effect on the contractual arrangements of working women. To identify causal effects, we exploit the variation generated by the institutional features of the policy mandate in India, which applies only to establishments employing 10 workers or more. We find that women are 4.3 percentage points less likely to be employed as regular salaried workers in the establishments as a result of this policy. We also show that there is an increase in the employment of women as unpaid and wage labourers in establishments, but no change takes place in women entrepreneurship. The effects appear to be driven by married and younger women confirming that the extension of maternity leave imposes a motherhood penalty in terms of women’s labor market opportunities.
New Phenomenology for Palatini f(R) Theories: Non-singular Universes
Creators: name: Olmo, Gonzalo J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study modified theories of gravity of the f(R) type in Palatini formalism. We first consider the stability of atoms when the Palatini gravitational interaction is taken into account in the derivation of the non-relativistic Schrodinger equation. We show that theories with infrared curvature corrections are ruled out by the mere existence of atoms. In particular, we carry out fully perturbative calculations that, for the first time, convincingly rule out the 1/R model of Carroll et al. in its Palatini version. We then study the Planck scale corrected quadratic model f(R)=R+R^2/R_P and show that it can avoid the big bang singularity for matter sources which satisfy all the energy conditions. We comment on the mechanisms that cure this singularity and point out that they are closely related to non-perturbative terms also present in the atomic Hamiltonian of infrared corrected models.
description: 8 pages, 3 figures. Talk given at "The Invisible Universe International Conference", Paris, France, June 29-July 3, 2009; added references
Data Processing at the Flaw Detector with Combined Multisector Eddy-Current Transducer
Creators: name: Yakimov, Evgeny
name: Goldshtein, Alexander
name: Bulgakov, Valery
name: Shipilov, Sergey
Publisher: name: Hochschule Anhalt
Year: 2014
Subjects: subject: 004: Datenverarbeitung, Informatik

description: Proceedings of 2nd International Conference on Applied Innovations in IT / Prof. Dr. Siemens, Eduard (2014). Jg. 2. Köthen, 2014, S. 67-71
description: IThere is described data processing at the flaw detector with combined multisectional eddy-current transducer and heterofrequency magnetic field. The application of this method for detecting flaws in rods and pipes under the conditions of significant transverse displacements is described.
Detection of $^7$Be II in the Small Magellanic Cloud
Creators: name: Izzo, Luca
name: Molaro, Paolo
name: Cescutti, Gabriele
name: Aydi, Elias
name: Selvelli, Pierluigi
name: Harvey, Eamonn
name: Agnello, Adriano
name: Bonifacio, Piercarlo
name: Della Valle, Massimo
name: Guido, Ernesto
name: Hernanz, Margarita
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyse high resolution spectra of two classical novae that exploded in the Small Magellanic Cloud. $^7$Be II resonance transitions are detected in both ASASSN-19qv and ASASSN-20ni novae. This is the first detection outside the Galaxy and confirms that thermo-nuclear runaway reactions, leading to the $^7$Be formation, are effective also in the low metallicity regime, characteristic of the SMC. Derived yields are of N($^7$Be=$^7$Li)/N(H) = (5.3 $\pm$ 0.2) $\times$ 10$^{-6}$ which are a factor 4 lower than the typical values of the Galaxy. Inspection of two historical novae in the Large Magellanic Cloud observed with IUE in 1991 and 1992 showed also the possible presence of $^7$Be and similar yields. For an ejecta of $M_{H,ej} =$ 10$^{-5}$ M$_{\odot}$, the amount of $^7$Li produced is of $M_{^7 Li} = (3.7 \pm 0.6) \times 10^{-10}$ M$_{\odot}$ per nova event. Detailed chemical evolutionary model for the SMC shows that novae could have made an amount of lithium in the SMC corresponding to a fractional abundance of A(Li) $\approx$ 2.6. Therefore, it is argued that a comparison with the abundance of Li in the SMC, as measured by its interstellar medium, could effectively constrain the amount of the initial abundance of primordial Li, which is currently controversial.
description: 13 pages, 17 figures, 4 tables. Accepted for publication in MNRAS
The Effects of the Development Zone Upgrading on the Diversification of Firm’s Product Exports: Evidence from Chinese Exporters
Creators: name: Zhan, Jinyong
name: Zhang, Haihan
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Science Policy
subject: Plant Biology

description: Against the backdrop of frequent international trade frictions, reducing external risks in export trade through industrial policies has become crucial for China’s high-quality and steady foreign trade development. This paper examines the impact of development zone upgrading policies on the diversification of firm product exports by using a time-varying difference-in-differences model. We find that after the upgrading of development zones, the diversification of firm product exports increases by 2.13%, and concentration decreases by 1.33%. Moreover, this policy has a stronger impact on the diversification level of product exports for firms upgraded to customs special supervision areas, located inland, and engaged in general trade. These conclusions remain robust even after conducting additional robustness tests using alternative measures of the dependent variable, different identification methods for development zone upgrading, and controlling for other industrial policy effects. Furthermore, the upgrading of development zones improves export diversification through three main channels: enhancing firm innovation capabilities, optimizing management efficiency, and providing financial support to firms.
Electromagnetic Non-contact Gears: Prelude
Creators: name: Parashar, Prachi
name: Milton, Kimball A.
name: Cavero-Peláez, Inés
name: Shajesh, K. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate the lateral Lifshitz force between corrugated dielectric slabs of finite thickness. Taking the thickness of the plates to infinity leads us to the lateral Lifshitz force between corrugated dielectric surfaces of infinite extent. Taking the dielectric constant to infinity leads us to the conductor limit which has been evaluated earlier in the literature.
description: 7 pages, 2 figures, Contribution to Proceedings of 9th Conference on Quantum Field Theory Under the Influence of External Conditions (QFEXT09), Norman, OK, September 21-25, 2009
The British Columbia Land Commission Act-1973
Creators: name: Smith, Barry Edward
Publisher: name: University of British Columbia
Year: 2010

description: It is estimated that British Columbia has less than five per cent of its land upon which soil bound agriculture can take place. Over the past twenty-five years, significant amounts of prime farmland have been lost to non-agricultural uses. To assist in stopping this trend, the Land Commission Act, R.S.B.C., 1973, Chapter 46, became law on April 18th, 1973. While the Act has a number of functions, this study examines only its objective of preserving agricultural land for farm use. The thesis is divided into two sections. Part one provides a review of a number of important reasons for implementing the Land Commission Act. The second part provides a descriptive analysis of the Act's implementation, including an analysis of the controversy and issues that arose from its introduction and the subsequent amendments that led to the Land Commission Act. It also includes an examination of the process of establishing the Agricultural Land Reserves as well as a review of possible future areas of activity of the Land Commission. The study is directed at the Land Commission's first year of operation. It does not include a comparative examination of legislation directed towards the preservation of farmland in other parts of Canada and the world. Neither does it analyse the economic impact the Land Commission Act will have on urban or agricultural land values or on the economic viability of the agricultural industry. The thesis more closely resembles a legal-political examination of a piece of legislation intended to help keep the Province's short and long range land use options open. When beginning to research this thesis, there was very little formally written material specifically concerning the Act. It was necessary, therefore, to gain information through an examination of the Act itself, Hansard, newspaper articles, and by interviewing and corresponding with several persons knowledgeable of the subject. Through the research it was found that during the intensive debate that followed the announcement of Bill 42, many statements in opposition to the legislation were erroneous. The primary purpose in researching and writing this thesis is to hopefully provide a fuller understanding of the Land Commission Act. It was also found that the much publicized amendments of the Act were generally for the purpose of clarification with but two exceptions. The success of the Land Commission Act in its attempt to preserve agricultural land can not be accurately assessed at this time. There remain many reasons to suspect that the Act will fail. The threat of continual urbanization of farmland remains its strongest adversary. There are, however, a number of aspects in the Commission's favour -- the most important being the strength of conviction of the Legislators and administrators and the awareness of the general public of the necessity of preserving farmland.
High intensity proton beam impact at 440 GeV/c on Mo and Cu coated CfC/graphite and SiC/SiC absorbers for beam intercepting devices
Creators: name: Maestre, Jorge
name: Bahamonde, Cristina
name: Garcia, Inigo Lamas
name: Kershaw, Keith
name: Biancacci, Nicolo
name: Busom, Josep
name: Frankl, Matthias
name: Lechner, Anton
name: Kurtulus, Adnan
name: Makimura, Shunsuke
name: Nakazato, Naofumi
name: Perez, Ana Teresa
name: Perillo-Marcone, Antonio
name: Salvant, Benoit
name: Seidenbinder, Regis
name: Teofili, Lorenzo
name: Calviani, Marco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Beam Intercepting Devices (BIDs) are essential protection elements for the operation of the Large Hadron Collider (LHC) complex. The LHC internal beam dump (LHC Target Dump Injection or LHC TDI) is the main protection BID of the LHC injection system; its main function is to protect LHC equipment in the event of a malfunction of the injection kicker magnets during beam transfer from the SPS to the LHC. Several issues with the TDI were encountered during LHC operation, most of them due to outgassing from its core components induced by electron cloud effects, which led to limitations of the injector intensity and hence had an impact on LHC availability. The absorbing cores of the TDIs, and of beam intercepting devices in general, need to deal with high thermo-mechanical loads induced by the high intensity particle beams. In addition, devices such as the TDI - where the absorbing materials are installed close to the beam, are important contributors to the accelerator impedance budget. To reduce impedance, the absorbing materials that make up the core must be typically coated with high electrical conductivity metals. Beam impact testing of the coated absorbers is a crucial element of development work to ensure their correct operation. The behaviour of several metal-coated absorber materials was investigated when exposed to high intensity and high energy proton beams in the HiRadMat facility at CERN. Different coating configurations based on copper and molybdenum, and absorbing materials such as isostatic graphite, Carbon Fibre Composite (CfC) and Silicon Carbide reinforced with Silicon Carbide fibres (SiC-SiC), were tested in the facility to assess the TDI's performance and to extract information for other BIDs using these materials. In addition to beam impact tests and an extensive Post Irradiation Examination (PIE) campaign, extensive numerical simulations were carried out.
description: 32 pages, 25 figures, accepted for publication in Journal of Instrumentation (JINST)
Deformed phase space in a two dimensional minisuperspace model
Creators: name: Sepangi, H. R.
name: Shakerin, B.
name: Vakili, B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the effects of noncommutativity and deformed Heisenberg algebra on the evolution of a two dimensional minisuperspace cosmological model in classical and quantum regimes. The phase space variables turn out to correspond to the scale factor of a flat FRW model with a positive cosmological constant and a dilatonic field with which the action of the model is augmented. The exact classical and quantum solutions in commutative and noncommutative cases are presented. We also obtain some approximate analytical solutions for the corresponding classical and quantum cosmology in the presence of the deformed Heisenberg relations between the phase space variables, in the limit where the minisuperspace variables are small. These results are compared with the standard commutative and noncommutative cases and similarities and differences of these solutions are discussed.
description: 20 pages, 7 figures + 4 contourplots, to appear in CQG
Systematic Study of Fission Barriers of Excited Superheavy Nuclei
Creators: name: Sheikh, J. A.
name: Nazarewicz, W.
name: Pei, J. C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A systematic study of fission-barrier dependence on excitation energy has been performed using the self-consistent finite-temperature Hartree-Fock+BCS (FT-HF+BCS) formalism with the SkM* Skyrme energy density functional. The calculations have been carried out for even-even superheavy nuclei with Z ranging between 110 and 124. For an accurate description of fission pathways, the effects of triaxial and reflection-asymmetric degrees of freedom have been fully incorporated. Our survey demonstrates that the dependence of isentropic fission barriers on excitation energy changes rapidly with particle number, pointing to the importance of shell effects even at large excitation energies characteristic of compound nuclei. The fastest decrease of fission barriers with excitation energy is predicted for deformed nuclei around N=164 and spherical nuclei around N=184 that are strongly stabilized by ground-state shell effects. For nuclei 240Pu and 256Fm, which exhibit asymmetric spontaneous fission, our calculations predict a transition to symmetric fission at high excitation energies due to the thermal quenching of static reflection asymmetric deformations.
description: 5 pages, 4 figures
Autonomy and Financial Performance in Informal Savings Associations
Creators: name: van Hemert, Daniël
name: D’Espallier, Bert
name: Mersland, Roy
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
subject: Computational Biology

description: A multitude of NGOs form informal savings and lending associations in developing countries, called savings groups. Group members are responsible for the day-to-day governance, operating within the framework provided by the NGOs. As NGOs differ in the model they provide, savings groups are endowed with different levels of autonomy over their operations. Drawing on theories related to autonomy and performance, we test whether more autonomous savings groups perform better. A two-way correlated random effects regression on data for 97,653 savings groups formed by five NGOs in 16 countries shows that savings groups with more autonomy over their financial operations demonstrate greater financial performance. Additionally, the financial performance of more autonomous savings groups improves more in subsequent cycles, suggesting that savings groups with more autonomy have a greater ability to adapt. We argue that groups thus benefit from being granted more autonomy over their day-to-day operations. Our study may have broader implications for similar development interventions by NGOs, in which participants could benefit from increased autonomy.
Iconografia das situações-limite: testemunhos gráficos, apesar de tudo
Creators: name: Muanis, Felipe
Publisher: name: Revista de Letras UTAD
Year: 2023

description: O artigo em questão propõe uma análise da possibilidade da representação de imagens de guerra, cárcere e genocídio em regimes de exceção, por meio de imagens artesanais, como a ilustração, a pintura e a escultura. Propõe-se que essas imagens são as representações possíveis e que, ao contrário de sua interdição por proporem algo que não pertence ao compreensível, são elas justamente as imagens possíveis ao aglutinarem experiência, testemunho e fabulação. São analisados no artigo autores como George Didi-Huberman, Márcio Seligmann-Silva, Primo Levi, além de variadas obras da pintura e ilustração, como Davi Olére, Adolf Frankl e Claudius Ceccon, bem como no cinema de realizadores como Claude Lanzamnn, Rithy Panh e Patricio Guzman.
description: Revista de Letras UTAD, Vol 1 Nº 8 (2023): Revista de Letras / Ciências da Comunicação
Holomorphic shadows in the eyes of model theory
Creators: name: Kessler, Liat
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: Logic (math.LO)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 03c98, 53d05

description: We define a subset of an almost complex manifold (M,J) to be a holomorphic shadow if it is the image of a J-holomorphic map from a compact complex manifold. Notice that a J-holomorphic curve is a holomorphic shadow, and so is a complex subvariety of a compact complex manifold. We show that under some conditions on an almost complex structure J on a manifold M, the holomorphic shadows in the Cartesian products of (M,J) form a Zariski-type structure. Checking this leads to non-trivial geometric questions and results. We then apply the work of Hrushovski and Zilber on Zariski-type structures. We also restate results of Gromov and McDuff on J-holomorphic curves in symplectic geometry in the language of shadows structures.
description: Changed and added content
Evidence of tidal debris from Omega Cen in the Kapteyn Group
Creators: name: Boer, E. C. Wylie-de
name: Freeman, K. C.
name: Williams, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This paper presents a detailed kinematic and chemical analysis of 16 members of the Kapteyn moving group. The group does not appear to be chemically homogenous. However, the kinematics and the chemical abundance patterns seen in 14 of the stars in this group are similar to those observed in the well-studied cluster, Omega Centauri. Some members of this moving group may be remnants of the tidal debris of Omega Cen, left in the Galactic disk during the merger event which deposited Omega Cen into the Milky Way.
description: 30 pages, 9 figures, 11 tables. Accepted for publication in AJ
XARASIMONLAR SINFI UMUMIY TAVSIFI, TASNIFI, ASOSIY VAKILLARI VA KO'PAYISH USULLARI
Creators: name: Zokirjonova, Feruza
Publisher: name: Zenodo
Year: 2025

description: Bu tezisda suv o’tlari va xarasimon suv o’tlari haqida qisqacha ma’lumot berilgan. Bundan tashqari ularning ko’payishi va ularning qayerda uchrashi haqida so’z yuritiladi.
Self-Checks In Spreadsheets: A Survey Of Current Practice
Creators: name: Colver, David
Publisher: name: arXiv
Year: 2010
Subjects: subject: Software Engineering (cs.SE)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: A common application of spreadsheets is the development of models that deliver projections of the future financial statements of companies established to pursue ventures that are subject to project financing. A survey of 11 such spreadsheets prepared by a range of organisations shows that the amount of self-testing included in such models ranges between one formula of testing for each three formulae of calculation, down to essentially no self-testing at all.
description: 7 Pages, 1 Table
Coconut Farmers Trained to Operate Tree Climbing Machines
Creators: name: Dr. V. Hari Kumar, Shri Kumaravel S*., Dr. K. Bhagyalakshmi, Dr. S. Neelaveni, Dr. S. Anusha, Dr. S. Kiran Kumar and Dr. Ch Balakrishna
Publisher: name: The Science world a Monthly e magazine
Year: 2024

description: The coconut palm is referred to as ‘Kalpavriksha’ – the ‘tree of heaven’ as each and every part of the palm is useful in one way or the other. As per the latest statistics available (2022-23), the annual coconut production in India is 21.28 billion nuts from an area of 2.27 million hectares with an average productivity of 9018 nuts/ha. India ranks third in area and first in production of coconut in the world. The four southern states viz., Kerala, Tamil Nadu, Karnataka and Andhra Pradesh are the major coconut producing states in India, accounting for more than 90 per cent of the area and production. In view of Andhra Pradesh coconut production is about 15.67 billion nuts from an area of 1.11 million hectares with an average productivity of 14,019 nuts/ha. Srikakulam district of Andhra Pradesh majorly growing coconut is about production 0.23billion nuts from an area of 14,383 hectares with an average productivity of 16,000 nuts/ha. East Coast Tall is the predominant variety in Uddanam area of Srikakulam district. Coconut farmers producing good yields but facing problem with harvesting of coconut trees due to its height and difficulty in climbing and harvesting, getting the services of skilled climbers in time and their high wage are thus perceived as important constraints. With this background Krishi Vigyan Kendra, Amadalavalasa approached Coconut Development Board (CDB), Vijayawada and Cochin for vocational training programme on coconut climbing to create skill to rural youth on climbing with tree climbing machines.  A good number of vocational training programmes entitled “Friends Of Coconut Tree” were organized by Krishi Vigyan Kendra, Amadalavalasa, Acharya NG Ranga Agricultural University, collaboration with Coconut Development Board, Vijayawada since 15 years. Farmers were trained to operate coconut climbing machines through hands on session which would minimize the labour cost and help farmers in quick harvesting. During training period, every day the trainees made to undergo Jogging for half an hour and training on Yoga and breathing exercises to create physically and mentally concentrate on training. Practical sessions on coconut climbing were taught by master trainers to trainees on with different heights viz., 10, 15, 20, 30, 35, 40 feet.
Quantum linear Boltzmann equation
Creators: name: Vacchini, Bassano
name: Hornberger, Klaus
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We review the quantum version of the linear Boltzmann equation, which describes in a non-perturbative fashion, by means of scattering theory, how the quantum motion of a single test particle is affected by collisions with an ideal background gas. A heuristic derivation of this Lindblad master equation is presented, based on the requirement of translation-covariance and on the relation to the classical linear Boltzmann equation. After analyzing its general symmetry properties and the associated relaxation dynamics, we discuss a quantum Monte Carlo method for its numerical solution. We then review important limiting forms of the quantum linear Boltzmann equation, such as the case of quantum Brownian motion and pure collisional decoherence, as well as the application to matter wave optics. Finally, we point to the incorporation of quantum degeneracies and self-interactions in the gas by relating the equation to the dynamic structure factor of the ambient medium, and we provide an extension of the equation to include internal degrees of freedom.
description: 63 pages, 6 figures; v3:corresponds to published version
Viscoelastic effects in boundary lubrication
Creators: name: Green, Marjorie Ann Carlson
Publisher: name: University of British Columbia
Year: 2010

description: The static friction of steel under boundary lubricated conditions was investigated both experimentally and theoretically. The theoretical model was developed using the assumption that during the application of a tangential load to a friction couple, the real area of contact grows in a viscoelastic manner until a critical shear stress is reached. Using this model, it was possible to distinguish the effect of static and dynamic contact time on area growth and thus to show why the traditional "time dependence of static friction" theories have limited validity. The model predicts that µs, the static friction coefficient, is a function of the rate parameter θ, and that a relaxation time can be assigned to a given interface. Subsequent experimental work using steel surfaces in vacuum as well as steel surfaces lubricated by various surface films showed that surface conditions play a large role in determining the exact µs - θ relationship for a given friction couple. Over the range of θ investigated the static friction coefficient of steel is constant if certain surface films are present; for other films the static friction coefficient vs θ curve shows an upper and lower asymptote. In the latter case a relaxation time was assigned to each boundary lubricant. For given asymptotes these relaxation times can be used to predict whether the film will be a useful lubricant at a particular θ. A subsequent investigation showed that the relaxation times are strongly affected by temperature. Since raising the substratum temperature results in smaller relaxation times, it is obvious that a particular lubricant may become ineffective as the substratum temperature changes. Both the experimental and theoretical work clearly demonstrate that the static friction of steel can be significantly modified by the application of appropriate boundary lubricants.
Mean-Field Theory of Meta-Learning
Creators: name: Plewczynski, Dariusz
Publisher: name: arXiv
Year: 2009
Subjects: subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We discuss here the mean-field theory for a cellular automata model of meta-learning. The meta-learning is the process of combining outcomes of individual learning procedures in order to determine the final decision with higher accuracy than any single learning method. Our method is constructed from an ensemble of interacting, learning agents, that acquire and process incoming information using various types, or different versions of machine learning algorithms. The abstract learning space, where all agents are located, is constructed here using a fully connected model that couples all agents with random strength values. The cellular automata network simulates the higher level integration of information acquired from the independent learning trials. The final classification of incoming input data is therefore defined as the stationary state of the meta-learning system using simple majority rule, yet the minority clusters that share opposite classification outcome can be observed in the system. Therefore, the probability of selecting proper class for a given input data, can be estimated even without the prior knowledge of its affiliation. The fuzzy logic can be easily introduced into the system, even if learning agents are build from simple binary classification machine learning algorithms by calculating the percentage of agreeing agents.
description: 23 pages