cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Molecular mechanisms of alarmones during bacterial stress responses
title: Molekulare Mechanismen von Alarmonen bei bakteriellen Stressreaktionen
titleType: AlternativeTitle
Creators: name: Giammarinaro, Pietro Ivan
Publisher: name: Philipps-Universität Marburg
Year: 2023
Subjects: Chemistry & allied sciences
Chemie
Biochemistry and Structural biology

description: In the incessant effort of living and propagating, bacterial cells cope with environmental stress via the release of second messengers and/or alarmones that allow them to adapt swiftly. Such molecules are nucleotidebased and can be promptly generated when stress stimuli occur. According to the cellular concentration of stress mediators, specific molecular targets would be activated to modulate vital processes for bacterial survival and proliferation. As soon as the stress is over, cells would repristinate the initial concentration of the stress-coping mediators with deputed enzymes. Overall, the aforementioned mechanisms fall in the definition of Bacterial Stress Response (BSF). The aim of the present doctoral thesis is to illustrate and discuss three published scientific articles that contributed to the understanding of the BSF in bacterial cells and the role of the stress mediators 5',5'''-diadenosine tetraphosphate (Ap4A) and ppGpp and pppGpp (collectively (p)ppGpp). The Publication #1 described how Ap4A could restrict the activity of the essential enzyme inosine monophosphate dehydrogenase (IMPDH) in Bacillus subtilis in order to reprogram the levels of purine nucleotides during heat shock. The present publication proposed IMPDH as the first physiologically confirmed target of Ap4A in prokaryotes and characterized the molecular mechanisms of how Ap4A inhibits IMPDH. The biological relevance of the interaction Ap4A-IMPDH was further analyzed and proven with in vivo experiments.
การพัฒนาแอปพลิเคชันด้านสุขภาพจิตสำหรับการให้การปรึกษารายบุคคลแบบออนไลน์เพื่อลดความเครียดของวัยรุ่น
Creators: name: คณิติน จรโคกกรวด
Publisher: name: หจก.เลิศศิลป์ สาส์น โฮลดิ้ง
Year: 2565
Subjects: แอปพลิเคชันด้านสุขภาพจิต
การปรับความคิดและพฤติกรรม
โปรแกรมการให้คำปรึกษารายบุคคลออนไลน์

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 16, 3, 222-235
Charged Cylindrical Polytropes with Generalized Polytropic Equation of State
Creators: name: Azam, M.
name: Mardan, S. A.
name: Noureen, I.
name: Rehman, M. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: We study the general formalism of polytropes in relativistic regime with generalized polytropic equations of state in the vicinity of cylindrical symmetry. We take charged anisotropic fluid distribution of matter with conformally flat condition for the development of general framework of polytropes. We discussed the stability of the model by Whittaker formula and concluded that one of the developed model is physically viable.
description: 21 pages, one figure
The Planetary Nebulae Luminosity Function (PNLF): current perspectives
Creators: name: Mendez, Roberto H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This paper starts with a brief historical review about the PNLF and its use as a distance indicator. Then the PNLF distances are compared with Surface Brightness Fluctuations (SBF) distances and Tip of the Red Giant Branch (TRGB) distances. A Monte Carlo method to generate simulated PNLFs is described, leading to the last subject: recent progress in reproducing the expected maximum final mass in old stellar populations, a stellar astrophysics enigma that has been challenging us for quite some time.
description: 4 pages, 2 figures; to appear in Proceedings of IAU Symposium 323 (Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution), eds. Xiaowei Liu, Letizia Stanghellini, & Amanda Karakas
title: Individualisierte Aortenwurzelrekonstruktion mit selektiven Ersatz der Sinus Valsalvae: Operationstechnik und Langzeitergebnisse
title: Patient-tailored Aortic Root Repair with Selective Replacement of Sinuses of Valsalva : Surgical technique and Long-term Results
titleType: AlternativeTitle
Creators: name: Irimie, Vadim-Petru
Publisher: name: Philipps-Universität Marburg
Year: 2023
Subjects: Medical sciences Medicine
Medizin
Yacoub,David
Valvular Heart Disease
Aorta
Aortenklappeninsuffizienz
Aortic Dissection
Aortendissektion
Aortic Root Repair
Aortenwurzelrekonstruktion
Aortic Regurgitation
Sinus Valsalva

description: Paul P. Urbanski entwickelte eine Operationstechnik mit dem Ziel, die verschiedenen chirurgischen und anatomo-physiologischen Aspekte der Wurzelrekonstruktion zu verbessern. Im Zuge dieser Operationstechnik erfolgt ein individualisierter Ersatz des Sinus Valsalvae mit einem Dacron-Patch sowie die Rekonstruktion des sinutubulären Überganges. Dadurch wird die anatomische Form der Aortenwurzel wiederhergestellt und Veränderungen in deren Geometrie, die zur Entwicklung einer iatrogenen Aortenklappeninsuffizienz führen können, vermieden. Ziel der vorliegenden Studie war es, die Langzeitergebnisse nach der von Urbanski entwickelten klappenerhaltenden Aortenwurzel-Rekonstruktion durch individualisierten Ersatz des Sinus Valsalvae zur ermitteln. Die durchschnittliche Follow-up-Zeit betrug 7,1 ± 4,1 Jahre, das entspricht 4725 Patienten-Jahren. Die Ergebnisse sind wie folgt: 339 Patienten (50,67 %) AKI 0, 289 Patienten(43,19) AKI 1+, 26 Patienten (3,88 %) AKI 2+ und 15 Patienten (2,42) AKI ≥3+. Die daraus entstehende kumulative Freiheit von AKI ≥ 3+ betrug 98 ± 1 %, 97 ± 1 % und 94 ± 3 % nach 5 Jahren, 10 Jahren. Die kumulative Freiheit von AKI ≥ 3+ und Aortenklappenersatz betrug 97,5 %, 95,9 % und 87,9 % nach 5, 10 und 15 Jahren. Es zeigte sich auch eine normale Lebenserwartung nach einer rekonstruktiven Aortenklappen-Operation bei betagten Menschen sowie eine unveränderte Überlebenschance bei einer allgemeinen deutschen Population von gleichem Alter und Geschlecht, trotz einer Rate akuter Aortendissektionen von 15 % Für den Vergleich mit der Literatur stellten wir zuerst die Daten von zwei Publikationen, in denen die Reimplantations-Technik beschrieben wurde, gegenüber. Es zeigte sich, dass die von Urbanski entwickelte Technik bessere Langzeitergebnisse hervorbringt. Um einen Vergleich mit der Remodeling-Technik zu haben, wurden unsere Daten denen von Bad Homburg gegenübergestellt. Hierbei zeigte sich, dass unsere Langzeitergebnisse gleich gut waren. Zusammenfassend lässt sich sagen, dass die von Urbanski entwickelte klappenerhaltende Aortenwurzel-Rekonstruktion durch individualisierten Ersatz des Sinus Valsalvae eine gültige Option für den klappenerhaltenden Wurzelersatz mit sehr guten Langzeitergebnissen ist. In Kombination mit der Korrektur eines Aortenklappenprolaps kann eine Wiederherstellung der Aortenklappenfunktion erreicht werden.
กระบวนการขับเคลื่อนและการปรับตัวของชุมชนในการดำเนินงานการศึกษาทางเลือกของศูนย์การเรียนหญ้าเป็ดน้ำ จังหวัดแม่ฮ่องสอน
Creators: name: วนิดา นาคีสังข์
Publisher: name: หจก.เลิศศิลป์ สาส์น โฮลดิ้ง
Year: 2565
Subjects: กระบวนการขับเคลื่อน
การปรับตัว
การศึกษาทางเลือก
ศูนย์การเรียนรู้

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 16, 3, 236-248
Stochastic model for the alignment and tumbling of rigid fibres in two-dimensional turbulent shear flow
Creators: name: Campana, Lorenzo
name: Bossy, Mireille
name: Bec, Jeremie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Non-spherical particles transported by an anisotropic turbulent flow preferentially align with the mean shear and intermittently tumble when the local strain fluctuates. Such an intricate behaviour is here studied for inertialess, rod-shaped particles embedded in a two-dimensional turbulent flow with homogeneous shear. A Lagrangian stochastic model for the rods angular dynamics is introduced and compared to the results of direct numerical simulations. The model consists in superposing a short-correlated random component to the steady large-scale mean shear, and can thereby be integrated analytically. To reproduce the single-time orientation statistics obtained numerically, it is found that one has to properly account for the combined effect of the mean shear, for anisotropic velocity gradient fluctuations, and for the presence of persistent rotating structures in the flow that bias Lagrangian statistics. The model is then used to address two-time statistics. The notion of tumbling rate is extended to diffusive dynamics by introducing the stationary probability flux of the rods unfolded angle. The model is found to reproduce the long-term effects of an average shear on the mean and the variance of the fibres angular increment. Still, it does not reproduce an intricate behaviour observed in numerics for intermediate times: the unfolded angle is there very similar to a Lévy walk with distributions of increments displaying intermediate power-law tails.
Decoherence of high-energy electrons in weakly disordered quantum Hall edge states
Creators: name: Nigg, Simon E.
name: Lunde, Anders Mathias
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate theoretically the phase coherence of electron transport in edge states of the integer quantum Hall effect at filling factor $ν=2$, in the presence of disorder and inter-edge state Coulomb interaction. Within a Fokker-Planck approach, we calculate analytically the visibility of the Aharonov-Bohm oscillations of the current through an electronic Mach-Zehnder interferometer. In agreement with recent experiments, we find that the visibility is independent of the energy of the current-carrying electrons injected high above the Fermi sea. Instead, it is the amount of disorder at the edge that sets the phase space available for inter-edge state energy exchange and thereby controls the visibility suppression.
description: 5 pages + supplement, 3 figures
การศึกษาทักษะการอ่านและทักษะการเขียนเพื่อการสื่อสารภาษาอังกฤษของนักเรียนชั้นมัธยมศึกษาปีที่ 6 โดยใช้การจัดการเรียนรู้แบบเน้นภาระงาน
Creators: name: อภิญญา แจ่มเจริญ
Publisher: name: หจก.เลิศศิลป์ สาส์น โฮลดิ้ง
Year: 2565
Subjects: การจัดการเรียนรู้แบบเน้นภาระงาน
ทักษะการอ่าน
ทักษะการเขียนเพื่อการสื่อสาร

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 16, 3, 249-260
Noise induced transients in phase-locked-loops .
Creators: name: Park, James Lewis.
Publisher: name: Monash University
Year: 2022

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.
Impact of Working Capital Management on Profitability of Manufacturing Share Companies in Ethiopia
Creators: name: Ahmed, Mifta
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The purpose of this study is to examine the impact of working capital management on profitability of manufacturing share companies in Ethiopia with special reference to large tax payers. In light of this objective the study adopted quantitative approaches to test a series of research hypotheses. Financial statements of a sample of sixteen (16) manufacturing share companies is used for a period of seven years (2008-2014) with the total of 112 observations. Data was analyzed on quantitative basis using descriptive and regression analysis (Ordinary Least Square) method. Proportionate random stratified sample was used.It examined the components in working capitalsuch as accounts receivable period, inventory holding period, accounts payable period, and cash conversion cycle in relation to return on asset (ROA).In addition the study used current ratio, used as liquidity indicator; firm size, as measured by logarithm of sales; firm growth rate as measured by change in annual sales and financial leverage, as control variables.The key findings from the study are; Firstly, there exists a significant negative relationship between average collection period and profitability indicating that an increase in the number of days a firm receives payment from sales affects the profitability of the firm negatively; secondly, there exists a negative relationship between inventory holding period with profitability andpositive relationship between accounts payable period and profitability. But, both inventory holding period and accounts payable period was found to be insignificant in affecting profitability of the firms. Thirdly, there exists a negative relationship between cash conversion cycle and profitability of the firm. Which indicates that as the cash conversion cycle decreases it leads to an increase in profitability of the firm, and managers can increase profitability of their firms by shortening the time lag between a firm's expenditure for purchases of raw materials and the collection of sales of finished goods. Finally, positive relationships between liquidity and profitability measures have also been observed.In general the study recommended that firms should minimize working capital management components in order to maximize profitability
การศึกษาผลสัมฤทธิ์ทางการเรียนรายวิชาคณิตศาสตร์และพฤติกรรมการทำงานกลุ่มของนักเรียนชั้นประถมศึกษาปีที่ 5 โดยใช้การจัดการเรียนรู้แบบร่วมมือเทคนิค STAD ร่วมกับกระบวนการแก้โจทย์ปัญหาของโพลยา
Creators: name: อุษา จวนสูงเนิน
Publisher: name: หจก.เลิศศิลป์ สาส์น โฮลดิ้ง
Year: 2565
Subjects: เทคนิค STAD
กระบวนการแก้โจทย์ปัญหา
พฤติกรรมการทำงานกลุ่ม
ผลสัมฤทธิ์ทางการเรียน

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 16, 3, 261-272
Observation of a Discrete Time Crystal
Creators: name: Zhang, J.
name: Hess, P. W.
name: Kyprianidis, A.
name: Becker, P.
name: Lee, A.
name: Smith, J.
name: Pagano, G.
name: Potirniche, I. -D.
name: Potter, A. C.
name: Vishwanath, A.
name: Yao, N. Y.
name: Monroe, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Spontaneous symmetry breaking is a fundamental concept in many areas of physics, ranging from cosmology and particle physics to condensed matter. A prime example is the breaking of spatial translation symmetry, which underlies the formation of crystals and the phase transition from liquid to solid. Analogous to crystals in space, the breaking of translation symmetry in time and the emergence of a "time crystal" was recently proposed, but later shown to be forbidden in thermal equilibrium. However, non-equilibrium Floquet systems subject to a periodic drive can exhibit persistent time-correlations at an emergent sub-harmonic frequency. This new phase of matter has been dubbed a "discrete time crystal" (DTC). Here, we present the first experimental observation of a discrete time crystal, in an interacting spin chain of trapped atomic ions. We apply a periodic Hamiltonian to the system under many-body localization (MBL) conditions, and observe a sub-harmonic temporal response that is robust to external perturbations. Such a time crystal opens the door for studying systems with long-range spatial-temporal correlations and novel phases of matter that emerge under intrinsically non-equilibrium conditions.
description: 9 pages, 8 figures
Enforcing connectivity of 3D linear structures using their 2D projections
Creators: name: Oner, Doruk
name: Osman, Hussein
name: Kozinski, Mateusz
name: Fua, Pascal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Many biological and medical tasks require the delineation of 3D curvilinear structures such as blood vessels and neurites from image volumes. This is typically done using neural networks trained by minimizing voxel-wise loss functions that do not capture the topological properties of these structures. As a result, the connectivity of the recovered structures is often wrong, which lessens their usefulness. In this paper, we propose to improve the 3D connectivity of our results by minimizing a sum of topology-aware losses on their 2D projections. This suffices to increase the accuracy and to reduce the annotation effort required to provide the required annotated training data. Code is available at https://github.com/doruk-oner/ConnectivityOnProjections.
Non-trivial role of interlayer cation states in iron-based superconductors
Creators: name: Guterding, Daniel
name: Jeschke, Harald O.
name: Mazin, I. I.
name: Glasbrenner, J. K.
name: Bascones, E.
name: Valenti, Roser
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Unconventional superconductivity in iron pnictides and chalcogenides has been suggested to be controlled by the interplay of low-energy antiferromagnetic spin fluctuations and the particular topology of the Fermi surface in these materials. Based on this premise, one would also expect the large class of isostructural and isoelectronic iron germanide compounds to be good superconductors. As a matter of fact, they, however, superconduct at very low temperatures or not at all. In this work we establish that superconductivity in iron germanides is suppressed by strong ferromagnetic tendencies, which surprisingly do not originate from changes in bond-angles or -distances with respect to iron pnictides and chalcogenides, but are due to changes in the electronic structure in a wide range of energies happening upon substitution of atom species (As by Ge and the corresponding spacer cations). Our results indicate that superconductivity in iron-based materials may not always be fully understood based on $d$ or $dp$ model Hamiltonians only.
The Organizational Emergence and Transformation of Mexican Migrant-Led Federations in Chicago
Creators: name: Becker Marcano, Philippe Eduardo
Publisher: name: University of Chicago
Year: 2022
Subjects: subject: Transnationalism
subject: Migrants
subject: HTAs
subject: Federations
subject: Collective Action
subject: Networks

description: This qualitative study traces the development and activities of two organizations of Mexican migrants in Chicago: the Federation of Michoacan Clubs in Illinois (FEDECMI) and the Federation of United Zacatecan Clubs in Illinois (FCUZI). These federations are composed of hometown clubs, which are membership organizations formed by Mexican migrants who originate from the same town in Mexico. Originally, hometown clubs primarily centered their activities on executing development projects in their communities of origin. As they started to conglomerate into federations of clubs from the same home state in the 1990s, members of these organizations acquired a capacity to negotiate with local, state, and federal political actors both in the U.S. and Mexico. The study examines how the federations responded to the elimination of a Mexican federal program in 2019 that had served as a motivator for hometown clubs, and how this response was conditioned by the ties that the organizations have with local actors in Mexico and the U.S. While both federations have ties to important political actors in both countries, FEDECMI has had longstanding ties with a local Illinois migrant rights coalition, which has allowed the federation to adapt its organizational strategy and become a services center for migrants in Illinois. FCUZI, however, has largely kept the same activities since its founding, partly because it has mainly sustained strong connections with Mexican government officials.
Anyonic spin-Hall effect on the Black Hole horizon
Creators: name: Marsot, Loic
name: Zhang, Peng-Ming
name: Horvathy, Peter
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using the fact that the horizon of black holes is a Carroll manifold, we show that an ``exotic photon'' i.e. a particle without mass and charge but with anyonic spin, magnetic moment and ``exotic'' charges associated with the 2-parameter central extension of the 2-dimensional Carroll group moves on the horizon of a Kerr-Newman Black Hole consistently with the Hall law.
description: 17 pages, 1 figure. Published version
Assessment of Resource Mobilization and its Management in Local NGOs (the Case of Local NGOs in Addis Ababa)
Creators: name: Dubiwak, Martha
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Resource mobilization is a valuable component for strengthening local NGOs and resource management is systems of policies and procedures that protect the assets of an organization. The objective of this study was to assess resource mobilization and its management by the local NGOs operating in Addis Ababa. Descriptive research method was conducted for the study. Accordingly, 94 local NGOs were selected from total 1520 target population using simple random sampling method. The main instrument for collecting primary data was questionnaire and interview; while secondary data was collected from published document of CHSA and selected local NGOs. The data generated were analyzed using statistical package for social science (SPSS version 20). The study findings indicated that dependence on foreign fund, donors rule and regulation, CHSA law, capacity limitation of the organization, lack of awareness on available opportunity, networking with resource providers and other NGOs, accountability and transparency were the main factors that affect resource mobilization and its management. Thus the researcher recommended promoting local resource mobilization to reduce dependence on foreign fund based on the study findings
Prediction of process failure in the anaerobic digestions of dairy wastes
Creators: name: Scott, P. H.
Publisher: name: Monash University
Year: 2022

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.
Ion trap with gold-plated alumina: substrate and surface characterization
Creators: name: Kim, Myunghun
name: Kim, Keumhyun
name: Hong, Jungsoo
name: Lee, Hyegoo
name: Moon, Youngil
name: Lee, Wonchan
name: Kim, Sehyun
name: Ha, Taekyun
name: Sim, Jae-Yoon
name: Lee, Moonjoo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We describe a complete development process of a segmented-blade linear ion trap. Alumina substrate is characterized with an X-ray diffraction and loss-tangent measurement. The blade is laser-micromachined and polished, followed by the sputtering and gold electroplating. Surface roughness is examined at each step of the fabrication via both electron and optical microscopies. On the gold-plated facet, we obtain a height deviation of tens of nanometers in the vicinity of the ion position. Trapping of laser-cooled $^{174}$Yb$^{+}$ ions is demonstrated.
description: 9 pages, 6 figures
Determinants of Foreign Direct Investment Flows in Ethiopia
Creators: name: Shebu, Dereje
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: This paper attempts to examine the determinants of Foreign Direct Investment flow in Ethiopia. The study applies multivariate ordinary least square regression by using time series data covering over the period 1974 to 2015. In order to point out the main factors that can highly affect the inflow of FDI in Ethiopia and to know how much these factors affect FDI leading to an oscillating trend, the study took the determinant of FDI in Ethiopia such as infrastructure development, the domestic market size and growth potential, macroeconomic stability, human capital development, openness, and external debt and evaluate as to how they affect the inflow of FDI. In the analysis there are findings. Firstly, I found that the explanatory variable such as macroeconomic stability measured by inflation rate, and openness have significant and negatively related to FDI. Second, exchange rate and school enrollment rate proxy of macroeconomic stability and human capital development respectively are found positively related and statistically significant to the inflow of FDI. Thread, gross fixed capital formation and real GDP growth rate proxy of infrastructures and market size respectively have statistically significant and positively related to FDI. Last, foreign debt has negative and insignificant effect on FDI. These findings imply that inflation and trade openness should be controlled and improved by giving special attention. Key words: FDI, FDI determinants, time series, ordinary least square regression
Permutations, power operations, and the center of the category of racks
Creators: name: Szymik, Markus
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: Racks and quandles are rich algebraic structures that are strong enough to classify knots. Here we develop several fundamental categorical aspects of the theories of racks and quandles and their relation to the theory of permutations. In particular, we compute the centers of the categories and describe power operations on them, thereby revealing free extra structure that is not apparent from the definitions. This also leads to precise characterizations of these theories in the form of universal properties.
description: 20 pages
Determinants of Capital Structure of Commercial Banks in Ethiopia
Creators: name: Shibru, Weldemikael
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2012

description: Determining the optimal capital structure is one of the most fundamental policy decisions faced by financial managers. Since optimal debt ratio influences firm's value, different firms determine capital structures at different levels to maximize the value of their firms. Thus, this study examines the relationship between leverage and firm specific (profitability, tangibility, growth, risk, size and liquidity) determinants of capital structure decision, and the theories of capital structure that can explain the capital structure of banks in Ethiopia. In order to investigate these issues a mixed method research approach is utilized, by combining documentary analysis and in-depth interviews. More specifically, the study uses twelve years (2000 - 2011) data for eight banks in Ethiopia. The findings show that profitability, size, tangibility and liquidity of the banks are important determinants of capital structure of banks in Ethiopia. However, growth and risk of banks are found to have no statistically significant impact on the capital structure of banks in Ethiopia. In addition, the results of the analysis indicate that pecking order theory is pertinent theory in Ethiopian banking industry, whereas there are little evidence to support static trade-off theory and the agency cost theory. Therefore, banks should give consideration to profitability, size, liquidity and tangibility when they determine their optimum capital structure
Synchronization in pairs of opto-thermally driven mechanically coupled micro-oscillators
Creators: name: Bhaskar, Aditya
name: Walth, Mark
name: Rand, Richard H.
name: Zehnder, Alan T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We study the phenomenon of synchronization in pairs of doubly clamped, mechanically coupled silicon micro-oscillators. A continuous-wave laser beam is used to drive the micro-beams into limit cycle oscillations and to detect the oscillations using interferometry. Devices of different dimensions are used to introduce frequency detuning, and short silicon bridges connecting the micro-beams are used as mechanical coupling between the oscillators. The region of synchronization is plotted for the MEMS system in the detuning vs. coupling parameter space and compared with the numerical analysis of a corresponding, lumped-parameter model. Three states of oscillations are observed i.e. the drift state, quasi-periodic state, and the synchronized state. The numerical model also distinguishes between in-phase and out-of-phase synchronization where out-of-phase synchronization is observed at low coupling strengths and low frequency detuning.
description: 7 pages, 6 figures. Published in the Journal of Microelectromechanical Systems
Digital code conversion : delta modulation and PCM.
Creators: name: Jones, Phillip Sydney.
Publisher: name: Monash University
Year: 2022

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.
Extending proper metrics
Creators: name: Ishiki, Yoshito
Publisher: name: arXiv
Year: 2022
Subjects: subject: Metric Geometry (math.MG)
subject: General Topology (math.GN)
subject: FOS: Mathematics

description: We first prove a version of Tietze-Urysohn's theorem for proper functions taking values in non-negative real numbers defined on $σ$-compact locally compact Hausdorff spaces. As its application, we prove an extension theorem of proper metrics, which states that if $X$ is a $σ$-compact locally compact space, $A$ is a closed subset of $X$, and $d$ is a proper metric on $A$ that generates the same topology of $A$, then there exists a proper metric on $X$ such that $D$ generates the same topology of $X$ and $D|_{A^{2}}=d$. Moreover, if $A$ is a proper retraction, we can choose $D$ so that $(A, d)$ is quasi-isometric to $(X, D)$. We also show analogues of theorems explained above for ultrametric spaces.
description: 15 pages. This paper is published in Topology and its Applications
Cosmological contribution from population III stars in ultracompact minihalos
Creators: name: Abe, Katsuya T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this work, we investigate the effect of Population~III~(Pop.~III) stars in ultracompact minihalos~(UCMHs) on the cosmic ionization history using the Planck observation data. Although high-redshift astrophysics is not understood yet, UCMHs could host the Pop.~III stars like the halos formed in the standard structure formation scenario. Such Pop.~III stars would emit ionizing photons during their main sequence and facilitate cosmic reionization in high redshifts. To study their effects on the global ionization, we model the cosmic reionization evolution based on the ``tanh"-type reionization model which is expressed by $z_{\mathrm{reio}}$ with additional two parameters characterizing the initial mass of UCMHs and the number density of UCMHs. We implement the Monte Carlo Markov Chain analysis with the latest Planck observation data for our reionization model. As the result, we found that if the UCMH initial mass is larger than $10^{8.4}\mathrm{M}_{\odot}$, the number density of UCMHs is strictly limited. Then we obtained the constraint on the amplitude of the primordial power spectrum through the constraint on the UCMH number density like $\mathcal{A}_ζ\lesssim 10^{-8}$ in the scales, $k\lesssim 50\mathrm{Mpc}^{-1}$, when we assume that the standard ``tanh"-type reionization occurs by $z=3$, so that we set $z_{\mathrm{reio}}>3$.
description: 12 pages, 7 figures
financial Distress and its Determinants in Selected Beverage and Metal Manufacturing Firms in Ethiopia
Creators: name: Ufo, Andualem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2011

description: In this paper attempts are made to identify determinants of financial distress in selected beverage and metal manufacturing firms in Ethiopia. The study estimates determinants of financial distress using panel data starting from 1999 to 2005. Using panel data regression, the researcher analyzed internal and some of external factors affecting firm's financial distress. The results show that profitability, firm age, liquidity and efficiency (Eff) have positive and significant influences to Debt Service Coverage (DSC) as a proxy of financial distress. On the other hand, leverage (Lev) has a negative and significant relation with DSC. Other variables such as operational viability and good corporate governance have no significant impact on the status of firm's financial distress. Furthermore, the analysis indicated that operationally viable companies in some period of time should not be a guarantee that the companies going concern to fulfil its liabilities. Liquidity of companies which can be a prominent point can be recognized by evaluating cash flow performance. On the other case, the response of financial managers to the sample questionnaires indicates that firm's liquidity, leverage, profitability, efficiency; firm size and low debt service coverage are the main causes of financial distress at highest degree. The variable operational viability causes firm's financial distress at higher level. On the other hand, the variable such as macroeconomic factors, industrial relations, good corporate governance implementation problems and firm age causes financial distress at lower level
Quaternary MgSiN_2-GaN alloy semiconductors for deep UV applications
Creators: name: Dernek, Ozan
name: Lambrecht, Walter R. L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ultra-wide direct band gap semiconductors hold great promise for deep ultraviolet opto-electronic applications. Here we evaluate the potential of MgSiN$_2$-GaN alloys for this purpose. Although MgSiN$_2$ itself has an indirect gap $\sim$0.4 eV below its direct gap of $\sim$6.5 eV, its different sign lattice mismatch from GaN in two different basal plane directions could avoid the tensile strain which limits Al$_x$Ga$_{1-x}$N on GaN for high $x$. Two octet-rule preserving structures (with space groups $Pmn2_1$ and $P1n1$) of a 50% alloy of MgSiN$_2$ and GaN are investigated and are both found to have gaps larger than 4.75 eV using quasiparticle self-consistent (QS) $GW$ calculations. Both are nearly direct gap in the sense that the indirect gap is less than 0.1 eV lower than the direct gap. Their mixing energies are positive yet small, with values of 8 (31) meV/atom for $Pmn2_1$ ($P1n1$) indicating only a small driving force toward phase separation.
description: 9 pages, 4 figures
title: A novel approach to the cohomology of symplectic quotients
title: Ein neuartiger Zugang zur Kohomologie symplektischer Quotienten
titleType: AlternativeTitle
Creators: name: Schmitt, Maximilian Lukas
Publisher: name: Philipps-Universität Marburg
Year: 2023
Subjects: subject: Symplectic geometry
subject: equivariant cohomology
subject: Symplektische Reduktion
subject: Äquivariante Kohomologie
subject: Symplektische Geometrie
subject: equivariant blow-up
subject: äquivariante Aufblasungen
subject: symplectic reduction
subject: Kirwan Abbildung
subject: Mathematics
subject: FOS: Mathematics
subject: Mathematik
subject: Kirwan map

description: We develop a novel approach to the topology of singular symplectic quotients by extending Sjamaar’s complex of differential forms to the complex of resolution differential forms. The motivation for this is to extend Sjamaar’s complex in a way which makes the definition of a Kirwan map possible. In his theory this is not possible due to the singularities of any connection form at the fixed points of the action. Thus, the idea is to resolve the group action by blow-ups. Doing this using real blow-ups results in a locally free action on the whole manifold but also in difficult exceptional bundles. Carrying out the construction using symplectic blow-ups the exceptional bundles turn out to be more controllable. This approach then allows to define a Kirwan map, whose surjectivity we study in case that the fixed point set has vanishing cohomology in odd degrees. It turns out that this map is surjective in even degrees while it is not surjective in odd degrees.
Charge-changing-cross-section measurements of $^{12-16}$C at around $45A$ MeV and development of a Glauber model for incident energies $10A-2100A$ MeV
Creators: name: Tran, D. T.
name: Ong, H. J.
name: Nguyen, T. T.
name: Tanihata, I.
name: Aoi, N.
name: Ayyad, Y.
name: Chan, P. Y.
name: Fukuda, M.
name: Hashimoto, T.
name: Hoang, T. H.
name: Ideguchi, E.
name: Inoue, A.
name: Kawabata, T.
name: Khiem, L. H.
name: Lin, W. P.
name: Matsuta, K.
name: Mihara, M.
name: Momota, S.
name: Nagae, D.
name: Nguyen, N. D.
name: Nishimura, D.
name: Ozawa, A.
name: Ren, P. P.
name: Sakaguchi, H.
name: Tanaka, J.
name: Takechi, M.
name: Terashima, S.
name: Wada, R.
name: Yamamoto, T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We have measured for the first time the charge-changing cross sections ($σ_{\text{CC}}$) of $^{12-16}$C on a $^{12}$C target at energies below $100A$ MeV. To analyze these low-energy data, we have developed a finite-range Glauber model with a global parameter set within the optical-limit approximation which is applicable to reaction cross section ($σ_{\text{R}}$) and $σ_{\text{CC}}$ measurements at incident energies from 10$A$ to $2100A$ MeV. Adopting the proton-density distribution of $^{12}$C known from the electron-scattering data, as well as the bare total nucleon-nucleon cross sections, and the real-to-imaginary-part ratios of the forward proton-proton elastic scattering amplitude available in the literatures, we determine the energy-dependent slope parameter $β_{\rm pn}$ of the proton-neutron elastic differential cross section so as to reproduce the existing $σ_{\text{R}}$ and interaction-cross-section data for $^{12}$C+$^{12}$C over a wide range of incident energies. The Glauber model thus formulated is applied to calculate the $σ_{\text{\tiny R}}$'s of $^{12}$C on a $^9$Be and $^{27}$Al targets at various incident energies. Our calculations show excellent agreement with the experimental data. Applying our model to the $σ_{\text{\tiny R}}$ and $σ_{\text{\tiny CC}}$ for the "neutron-skin" $^{16}$C nucleus, we reconfirm the importance of measurements at incident energies below $100A$ MeV. The proton root-mean-square radii of $^{12-16}$C are extracted using the measured $σ_{\text{CC}}$'s and the existing $σ_{\text{R}}$ data. The results for $^{12-14}$C are consistent with the values from the electron scatterings, demonstrating the feasibility, usefulness of the $σ_{\text{CC}}$ measurement and the present Glauber model.
description: 8 pages, 4 figures
Stress corrosion cracking of cold drawn prestressing tendon
Creators: name: McGuinn, K. F.
Publisher: name: Monash University
Year: 2022

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.
Usability evaluation of cognitive training with the NeuroAIreh@b platform: preliminary results of an ongoing pilot study
Creators: name: Paulino, Teresa
name: Câmara, Joana
name: Branco, Diogo
name: Ferreira, Luís
name: Spínola, Mónica
name: Faria, Ana
name: Bermudez, Sergi
name: Fermé, Eduardo
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 460806
subject: Human-computer interaction

description: We present the preliminary results on the usability of four tablet-based cognitive training tasks ofthe NeuroAIreh@b platform. These tasks address the training of activities of daily living and havebeen designed involving professionals of various disciplines following human-computerinteraction methods. After an iterative development process accompanied by testing sessions withhealthy participants, we started a pilot study with stroke and traumatic brain injury patients. Todate, ten participants have gone through a 4-week cognitive training program in a clinical setting,using the developed tasks. Results from the System Usability Scale and the satisfaction section ofthe Usefulness, Satisfaction and Ease of use questionnaire show acceptable levels of usability andsatisfaction.
(PDF) Usability evaluation of cognitive training with the NeuroAIreh@b platform: preliminary results of an ongoing pilot study. Available from: https://www.researchgate.net/publication/364936964_Usability_evaluation_of_cognitive_training_with_the_NeuroAIrehb_platform_preliminary_results_of_an_ongoing_pilot_study [accessed Aug 16 2023].
Voxel datacubes for 3D visualization in Blender
Creators: name: Gárate, Matías
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The growth of computational astrophysics and complexity of multidimensional datasets evidences the need for new versatile visualization tools for both analysis and presentation of the data. In this work we show how to use the open source software Blender as a 3D visualization tool to study and visualize numerical simulation results, focusing on astrophysical hydrodynamic experiments. With a datacube as input, the software can generate a volume rendering of the 3D data, show the evolution of a simulation in time, and do a fly-around camera animation to highlight the points of interest. We explain the process to import simulation outputs into Blender using the Voxel Data format, and how to set up a visualization scene in the software interface. This method allows scientists to perform a complementary visual analysis of their data, and display their results in an appealing way, both for outreach and science presentations.
description: 14 pages, 5 figures. Accepted for publication in PASP Focus Issue: Techniques and Methods for Astrophysical Data Visualization
Algebraic approach to a two-qubit quantum thermal machine
Creators: name: Duriez, A. C.
name: Martínez-Tibaduiza, D.
name: Khoury, A. Z.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Algebraic methods for solving time dependent Hamiltonians are used to investigate the performance of quantum thermal machines. We investigate the thermodynamic properties of an engine formed by two coupled q-bits, performing an Otto cycle. The thermal interaction occurs with two baths at different temperatures, while work is associated with the interaction with an arbitrary time-dependent magnetic field that varies in intensity and direction. For the coupling, we consider the 1-d isotropic Heisenberg model, which allows us to describe the system by means of the irreducible representation of the $\mathfrak{su}(2)$ Lie algebra within the triplet subspace. We inspect different settings of the temperatures and frequencies of the cycle and investigate the corresponding operation regimes of the engine. Finally, we numerically investigate the engine efficiency under a time varying Rabi frequency, interpolating the abrupt and adiabatic limits.
description: 11 pages, 5 figures, submitted to Physical Review A
Schwarzschild-Finsler-Randers spacetime: Dynamical analysis, Geodesics and Deflection Angle
Creators: name: Kapsabelis, E.
name: Kevrekidis, P. G.
name: Stavrinos, P. C.
name: Triantafyllopoulos, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work, we extend the study of Schwarzschild-Finsler-Randers (SFR) spacetime previously investigated by a subset of the present authors (Triantafyllopoulos et al. in Eur Phys J C 80(12):1200, 2020; Kapsabelis et al. in Eur Phys J C 81(11):990, 2021). We will examine the dynamical analysis of geodesics which provides the derivation of the energy and the angular momentum of a particle moving along a geodesic of SFR spacetime. This study allows us to compare our model with the corresponding of general relativity (GR). In addition, the effective potential of SFR model is examined and it is compared with the effective potential of GR. The phase portraits generated by these effective potentials are also compared. Finally we deal with the derivation of the deflection angle of the SFR spacetime and we find that there is a small perturbation from the deflection angle of GR. We also derive an interesting relation between the deflection angles of SFR model and the corresponding result in the work of Shapiro et al (Phys Rev Lett 92(12):121101, 2004). These small differences are attributed to the anisotropic metric structure of the model and especially to a Randers term which provides a small deviation from the GR.
description: 21 pages, 5 figures
“Third World Women Need Saving:” The Hegemonic Discourses of Development Present in Gender Mainstreaming in Guatemala
Creators: name: Marchese Gonzalez, Francesca
Publisher: name: University of Chicago
Year: 2022
Subjects: subject: critical development studies, discourse analysis, feminist critiques, Guatemala, postcolonial theory

description: This thesis sheds light on hegemonic discourses of development of development agencies and implementers and their impacts on participating communities. The thesis discusses how ideologies about development and gender plague the theory and practice behind development projects, especially those that focus on gender empowerment initiatives, and affect their ability to effect structural and social change. To consolidate the argument, a case study is provided to show the underlying effects and results of the perpetuation of these discourses in Guatemalan society: it comprises a discourse analysis on a UNDP development project in Guatemala, known as the Programa Maya Fase III. The discourse analysis highlights the gendered and hegemonic discourses of development present in the Programa Maya Fase III, and the ways it is representative of a greater phenomenon within the international development field. The conclusions drawn from the analysis lead the author the importance of incorporating feminist and postcolonial critiques to development practices and projects, in efforts to avoid repeating the consequences from perpetuating hegemonic discourses of development.