cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Obtaining the Pre-Inverse of a Power Amplifier using Iterative Learning Control
Creators: name: Schoukens, Maarten
name: Hammenecker, Jules
name: Cooman, Adam
Publisher: name: arXiv
Year: 2016
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Telecommunication networks make extensive use of power amplifiers to broaden the coverage from transmitter to receiver. Achieving high power efficiency is challenging and comes at a price: the wanted linear performance is degraded due to nonlinear effects. To compensate for these nonlinear disturbances, existing techniques compute the pre-inverse of the power amplifier by estimation of a nonlinear model. However, the extraction of this nonlinear model is involved and requires advanced system identification techniques. We used the plant inversion iterative learning control algorithm to investigate whether the nonlinear modeling step can be simplified. This paper introduces the iterative learning control framework for the pre-inverse estimation and predistortion of power amplifiers. The iterative learning control algorithm is used to obtain a high quality predistorted input for the power amplifier under study without requiring a nonlinear model of the power amplifier. In a second step a nonlinear pre-inverse model of the amplifier is obtained. Both the nonlinear and memory effects of a power amplifier can be compensated by this approach. The convergence of the iterative approach, and the predistortion results are illustrated on a simulation of a Motorola LDMOS transistor based power amplifier and a measurement example using the Chalmers RF WebLab measurement setup.
The HADES RV Programme with HARPS-N@TNG II. Data treatment and simulations
Creators: name: Perger, M.
name: García-Piquer, A.
name: Ribas, I.
name: Morales, J. C.
name: Affer, L.
name: Micela, G.
name: Damasso, M.
name: Suárez-Mascareño, A.
name: González-Hernández, J. I.
name: Rebolo, R.
name: Herrero, E.
name: Rosich, A.
name: Lafarga, M.
name: Bignamini, A.
name: Sozzetti, A.
name: Claudi, R.
name: Cosentino, R.
name: Molinari, E.
name: Maldonado, J.
name: Maggio, A.
name: Lanza, A. F.
name: Poretti, E.
name: Pagano, I.
name: Desidera, S.
name: Gratton, R.
name: Piotto, G.
name: Bonomo, A. S.
name: Fiorenzano, A. F. Martinez
name: Giacobbe, P.
name: Malavolta, L.
name: Nascimbeni, V.
name: Rainer, M.
name: Scandariato, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The distribution of exoplanets around low-mass stars is still not well understood. Such stars, however, present an excellent opportunity of reaching down to the rocky and habitable planet domains. The number of current detections used for statistical purposes is still quite modest and different surveys, using both photometry and precise radial velocities, are searching for planets around M dwarfs. Our HARPS-N red dwarf exoplanet survey is aimed at the detection of new planets around a sample of 78 selected stars, together with the subsequent characterization of their activity properties. Here we investigate the survey performance and strategy. From 2700 observed spectra, we compare the radial velocity determinations of the HARPS-N DRS pipeline and the HARPS-TERRA code, we calculate the mean activity jitter level, we evaluate the planet detection expectations, and we address the general question of how to define the strategy of spectroscopic surveys in order to be most efficient in the detection of planets. We find that the HARPS-TERRA radial velocities show less scatter and we calculate a mean activity jitter of 2.3 m/s for our sample. For a general radial velocity survey with limited observing time, the number of observations per star is key for the detection efficiency. In the case of an early M-type target sample, we conclude that approximately 50 observations per star with exposure times of 900 s and precisions of about 1 m/s maximizes the number of planet detections.
Quality of the cardiac massage provided by special Nurses in Birjand’s hospitals, Birjand, Iran during 2019
Publisher: name: Birjand University of Medical Sciences
Year: 2022

description: The prognosis of patients with cardiac arrest depends on the provision of high quality cardiac massage and the nurses are expected to be able to provide high-quality cardiac massage. Therefore, this study aimed to investigate the quality of cardiac massage and its effective factors in 90 nurses of Birjand hospitals, Birjand, Iran, in 2019. This cross-sectional descriptive study was conducted using the available sampling method. Moreover, four quality items of cardiac massage (depth, speed, full chest recoil, continuity) were examined using a Q-CPR device and extracting the percentage of optimal performance of each item.\nAccording to the obtained results, the Mean±SD of the total scores of cardiac massage quality, massage depth, continuity, speed, and full chest recoil were recorded at 30±15, 20±27, 21±20, 26±38 and, 22±35 by Q-CPR device. A significant increase was observed in the quality of massage in males compared to females, after passing a resuscitation workshop, and with the increase of education level (P=0.03). \nThere was a significant difference between and the quality of cardiac massage measured by the Q-CPR devise after the cardiac resuscitation workshops and the quality of cardiac massage before the workshop (P=0.01). There was a significant association between the level of education and the quality of cardiac massage measured by the Q-CPR device (P=0.001). The results indicated that only 30% of cardiac massage performed by nurses was performed correctly, which was not desirable. Therefore, it is necessary to look for methods that lead to the higher efficiency of nurses in performing high-quality cardiac massage. It seems that there is a need for the use of audio and video feedback tools during the cardiac massage as well as resuscitation workshops with a skill-enhancing approach. Further studies are recommended to provide effective feedback to nurses and paramedics in order to observe the standards of high-quality cardiopulmonary resuscitation.\n
A numerical technique to study motions in A2-layered stratified liquid with free surface waves
Creators: name: Riedel, Hans Peter.
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.
Threats to Professional Ethics: Among Selected Authorized Accountants and Auditors In Ethiopia
Creators: name: Bayou, Engida
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The objective of the research was to identify the threats that impede adherence to professional ethics among selected Authorized Accountants and Authorized Auditors in Ethiopia. The pillars of ethical values rest on integrity, objectivity, professional competence and due care, confidentiality and professional behavior. Observance of these pillars of ethics was evaluated in light of threats and safeguards. The research approach employed for the study was mixed research augmented with simple statistical analysis. Respondent Authorized Accountants and Authorized Auditors were selected using snowballing technique. The data collected from the subjects of the study was validated by triangulation. Bankers and Tax Auditors were identified as principal users of the financial reports and thus used to validate the data. Key informants interview with persons having close ties with the profession was conducted to enrich the data. The findings indicate that there are lapses in the observance of professional ethics. The lapses in upholding ethical values are traced to intimidation, work environment, legislative environment, integrity, familiarity, professional competence and due care and self-interest. The recently promulgated legal provision for the adoption of IFRS as accounting standard in Ethiopia is a milestone in the traverses of the profession filling the gaps in the legal and professional environment. On the bright side, there are high hopes and expectations from the newly established Accounting and Audit Board of Ethiopia towards regulating and monitoring the profession. The migration to the new reporting and regulatory system requires a concerted effort from the professionals. Rules by themselves are not ends but means towards the desired goal. Principles rather than rules would make a difference towards ethical professionals. Key words: professional ethics, threats, to professional ethics, safeguards to professional ethics Ethiopia
The DECam Minute Cadence Survey I
Creators: name: Belardi, Claudia
name: Kilic, Mukremin
name: Munn, Jeffrey A.
name: Gianninas, A.
name: Barber, Sara D.
name: Dey, Arjun
name: Stetson, Peter B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the first results from a minute cadence survey of a three square degree field obtained with the Dark Energy Camera. We imaged part of the Canada-France-Hawaii Telescope Legacy Survey area over eight half-nights. We use the stacked images to identify 111 high proper motion white dwarf candidates with g $\leq24.5$ mag and search for eclipse-like events and other sources of variability. We find a new g = 20.64 mag pulsating ZZ Ceti star with pulsation periods of 11-13 min. However, we do not find any transiting planetary companions in the habitable zone of our target white dwarfs. Given the probability of eclipses of 1% and our observing window from the ground, the non-detection of such companions in this first field is not surprising. Minute cadence DECam observations of additional fields will provide stringent constraints on the frequency of planets in the white dwarf habitable zone.
description: 12 pages, 11 figures, 5 tables, accepted in MNRAS
Determinants of Ethiopian Private Commercial Banks' Asset Quality
Creators: name: Getachew, Tesfa
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: Both macroeconomic and bank-specific factors affect the occurrence of Non-Performing Loan; the most suitable proxy for asset quality measurement. This study identifies bank specific and macroeconomic factors that contribute to these nonperforming loans in Ethiopian private commercial banks. Six private commercial banks have been the subject for the study ranging from 2004/2005 to 2012/2013. The bank's financial statement, National Bank of Ethiopia and Ministry of finance and Economic Cooperation has been the main source for the study and the panel analysis has been carried out to obtain the result for this empirical study. The study begins with Hausman test (Random Effect Model versus Fixed Effect Model) to determine the most suitable model to be used in this study. The empirical results showed that GDP growth and annual inflation rate are positively related to non-performing loans, suggesting that private commercial banks should consider the macro economic factors before extending loans. A negative relationship of CAR and ROE with the volume of private commercial banks non- performing loans was also found. Contrary to previous studies, the findings also showed an insignificant relationship among real lending rate and NPLs of Ethiopian private commercial banks. Keywords: Non-performing loans; Macroeconomic determinants; Bank specific determinants
Assessment of tetanus immunity in elderly people over 60 years old in Birjand, Iran, 2018-2019
Publisher: name: Birjand University of Medical Sciences
Year: 2022

description: Tetanus is a neurological disease associated with increased muscle contraction and spasm in patients. The risk and progression of the disease are higher in elderly patients. Numerous elderly people in our country, especially in rural areas, lack tetanus vaccination in childhood. Due to the weakness of the immune system in the elderly, this study aimed to assess the tetanus immunity in the elderly over 60 years old in Birjand, Iran, 2018-2019. In this cross-sectional descriptive study, the level of tetanus antibody was measured in serum samples of 186 individuals from the elderly population of Birjand in 2018-2019. The mean level of tetanus antibody was estimated at 0.355±0.63 IU/ml, showing that 132 (71%) cases lacked immunity against tetanus (95% CI: 0.23-0.36). In the present study, the level of tetanus antibody decreased significantly with aging (P=0.002), and a significant difference was observed between the job and the level of tetanus antibody (P=0.003). The mean level of tetanus antibody increased significantly in individuals with an increase in education level (P=0.018). However, the mean level of tetanus antibody showed no significant difference with the living place (P=0.232) and gender (P=0.872). In this study, more than 70% of the elderly lacked immunity against tetanus, indicating the need for more attention in providing more health services to the elderly.
PICO-based problem solving (question-answer) of the ST-segment elevation in the aVR lead in a patient with chest pain referred to a hospital emergency department
Publisher: name: Birjand University of Medical Sciences
Year: 2022

description: In evidence-based medicine, constructing research questions is the most important part of research integration. Formulating a research question is the first step to conducting a credible and valuable research. Patient, intervention, comparison, outcome (PICO) is a specialized framework used by most researchers to formulate a research question and facilitate resource review. In the heart ward of Razi Hospital, Birjand University of Medical Sciences, according to the needs assessments, PICO was implemented during the Journal Club to familiarize students with research and increase their level of knowledge, attitude, as well as clinical reasoning skills. In this article, we explain the case of a 36-year-old woman with typical chest pain for 3 hours due to severe stress, without cardiac risk factors referring to the emergency room. The clinical examination was normal. The ST elevation was observed in the aVR lead. The question is “Should we perform an invasive intervention for this patient?
The HDUV Survey: Six Lyman Continuum Emitter Candidates at z~2 Revealed by HST UV Imaging
Creators: name: Naidu, R. P.
name: Oesch, P. A.
name: Reddy, N.
name: Holden, B.
name: Steidel, C. C.
name: Montes, M.
name: Atek, H.
name: Bouwens, R. J.
name: Carollo, C. M.
name: Cibinel, A.
name: Illingworth, G. D.
name: Labbe, I.
name: Magee, D.
name: Morselli, L.
name: Nelson, E. J.
name: van Dokkum, P. G.
name: Wilkins, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present six galaxies at z~2 that show evidence of Lyman continuum (LyC) emission based on the newly acquired UV imaging of the Hubble Deep UV legacy survey (HDUV) conducted with the WFC3/UVIS camera on the Hubble Space Telescope (HST). At the redshift of these sources, the HDUV F275W images partially probe the ionizing continuum. By exploiting the HST multi-wavelength data available in the HDUV/GOODS fields, models of the UV spectral energy distributions, and detailed Monte Carlo simulations of the intergalactic medium absorption, we estimate the absolute ionizing photon escape fractions of these galaxies to be very high -- typically >60% (>13% for all sources at 90% likelihood). Our findings are in broad agreement with previous studies that found only a small fraction of galaxies to show high escape fraction. These six galaxies comprise the largest sample yet of LyC leaking candidates at z~2 whose inferred LyC flux has been cleanly observed at HST resolution. While three of our six candidates show evidence of hosting an active galactic nucleus (AGN), two of these are heavily obscured and their LyC emission appears to originate from star-forming regions rather than the central nucleus. This suggests an AGN-aided pathway for LyC escape from these sources. Extensive multi-wavelength data in the GOODS fields, especially the near-IR grism spectra from the 3D-HST survey, enable us to study the candidates in detail and tentatively test some recently proposed indirect methods to probe LyC leakage -- namely, the [OIII]/[OII] line ratio and the H$β-$UV slope diagram. High-resolution spectroscopic followup of our candidates will help constrain such indirect methods which are our only hope of studying $f_{esc}$ at z~5-9 in the fast-approaching era of the James Webb Space Telescope.
description: 11 pages, 6 figures, submitted to ApJ
Determinants of Capital Adequacy Ratio: An Empirical Study on Commercial Banks of Ethiopia
Creators: name: Wondifraw, Dawit
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: This study was conducted to examine bank specific and macroeconomic determinant factors of Capital Adequacy ratios of commercial banks in Ethiopia. To this end, the researcher collected secondary sources of panel data over the period 2002-2013from eight senior commercial banks in Ethiopia selected based on purposive sampling. The research finding revealed that Bank size (SIZE), liquidity (LQR) and Non-Performing Loan (NPL) ratio had positive whereas Inflation (INF) had negative, but insignificant effect on CAR of commercial banks in Ethiopia. The share of deposit (DAR), Loan(LAR), Loan provision (LPR), Bank risk (RAR), Return on equity and Economic growth (GDP) had negative and statistically significant effect on Capital Adequacy ratios of commercial banks in Ethiopia. Furthermore, Return on Asset (ROA) and Net interest Margin (NIM) had positive and statistically significant effect on CAR of commercial banks in Ethiopia. The finding of this study is significant as it revealed to bank managers the relevant factors to take into consideration when they make financial policies to maintain at least the expected required level of CAR. Based on the findings, the study recommends to the management of National Bank of Ethiopia to revise the existing minimum requirement based on Basel III accord and also to influence commercial banks in order to disclose all component of CAR in detail in their annual financial statement
Studies in the electrodeposition of metals from anhydrous ammonia solution
Creators: name: Miechel, Lee Ivan.
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.
Epistimi: Women in STEMM supporting each other in leadership development
Creators: name: Rigos, Angeliki Artemis (Diane)
name: Hering, Janet G.
name: Maurice, Patricia A.
Publisher: name: Zenodo
Year: 2023
Subjects: gender
leadership
STEMM
training program

description: A post on the Epistimi leadership program for women in STEMM. Also available on the Epistimi website (https://www.epistimi.org/blog/epistimi-women-in-stemm-supporting-each-other-in-leadership-development).
Solid-gas reaction in packed beds
Creators: name: Millane, Brendan Vincent.
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.
Dynamical Formation of Binary Black Holes in Star Clusters
Creators: name: Bruel, Tristan
Publisher: name: Zenodo
Year: 2023

description: We apply a new framework to consistently model the formation of star clusters in cosmological simulations of galaxies. Each simulation, taken from the FIRE project, provides a realistic star formation environment with a unique star formation history and the conditions for star cluster formation. Combined with the code for star cluster evolution CMC, we are able to produce populations of dynamically formed BBHs across cosmic time.
Determinants of External Audit Quality: Evidence from Manufacturing Share Companies in Addis Ababa, Ethiopia.
Creators: name: Arebu, Bogale
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: Audit quality is a very debatable topic in the area of auditing for the last decades following the accounting scandals experienced in the West. One of the issues that gained momentum has been to analyze the external audit quality and the various determinant factors those influence it. The purpose of this study is to investigate the determinants of external audit quality proxied by discretionary (abnormal) accrual based on audit firm specific and company related attributes that are considered vital by regulatory and professional bodies to properly monitor the external audit profession and to maintain trust among the various stakeholders in Ethiopian manufacturing share companies. In light of this objective the study adopted quantitative method of research approaches to test a series of research hypothesis. Specifically, the study used documentary analysis of companies' audited financial statements and personal inquiry with audit directors/officials of audit firms and company managers. Then companies were selected based on simple random sampling method to avoid biases and represent firms within manufacturing share companies under consideration. Consequently, the study selected a sample of eighteen (18) companies for the period of five years (2011-2015) with the total of 90 observations. The results of panel least square regression analysis show that certified audit professionals' and joint provision of audit and non-audit services have statistically significant and positive relationship with manufacturing share companies' external audit quality. On the other hand, size of independent non-executive board members and duality of chief executive officers has a negative and statistically significant relationship with large manufacturing shares' external audit quality. However, the relationship for audit firm size, audit firm industry specialization and audit firm tenure were found to be statistically insignificant. Therefore, this is a clear that all large manufacturing share companies in Ethiopia should maintain board independence and keep in mind audit firm characteristics while hiring of an audit firm for their audit services Keywords: external audit quality, audit-firm specific attributes, corporate governance attributes, earning management, discretionary (abnormal) accrual.
Kinetics of Fluid Demixing in Complex Plasmas: Domain Growth Analysis using Minkowski Tensors
Creators: name: Böbel, Alexander
name: Räth, Christoph
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: A molecular dynamics simulation of the demixing process of a binary complex plasma is analysed and the role of distinct interaction potentials is discussed by using morphological Minkowski tensor analysis of the minority phase domain growth in a demixing simulated binary complex plasma. These Minkowski tensor methods are compared with previous results that utilized a power spectrum method based on the time-dependent average structure factor. It is shown that the Minkowski tensor methods are superior to the previously used power spectrum method in the sense of higher sensitivity to changes in domain size. By analysis of the slope of the temporal evolution of Minkowski tensor measures qualitative differences between the case of particle interaction with a single length scale compared to particle interactions with two different length scales (dominating long range interaction) are revealed. After proper scaling the graphs for the two length scale scenario coincide, pointing towards universal behaviour. The qualitative difference in demixing scenarios is evidenced by distinct demixing behaviour: In the long range dominated cases demixing occurs in two stages. At first neighbouring particles agglomerate then domains start to merge in cascades. However in the case of only one interaction length scale only agglomeration but no merging of domains can be observed. Thus, Minkowski Tensor analysis are likely to become a useful tool for further investigation of this (and other) demixing processes. It is capable to reveal (nonlinear) local topological properties, probing deeper than (linear) global power spectrum analysis, however still providing easily interpretable results founded on a solid mathematical framework.
description: 12 pages, 10 figures, Phys. Rev. E, accepted for publication, http://journals.aps.org/pre
Supplemental material for Linkages between Parenting Practices and Adolescents’ Life Satisfaction: The Mediating Role of Resilience
Creators: name: Authors, Anonymous
Publisher: name: figshare
Year: 2022
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: Supplemental material for Linkages between Parenting Practices and Adolescents’ Life Satisfaction: The Mediating Role of Resilience
Birgit Aschmann / Christian Waldhoff (Hrsg.), Die spanische Verfassung von 1978. Entstehung – Praxis – Krise? (Spanische Forschungen der Görresgesellschaft, Bd. 44.) Münster, Aschendorff 2020
Creators: name: Althammer, Beate
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: 940 Geschichte Europas

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers (De Gruyter) frei zugänglich.
Role of Financial Institutions in the Growth of Small and Medium Enterprises in Addis Ababa
Creators: name: Workie, Dereje
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2012

description: This thesis examines the role of financial institutions, banks and microfinance institutions, in the growth of small and medium enterprises (SMEs). The study focuses on examining the contribution of financial institutions, assessing the accessibility and affordability of products and services, and identifying ways of addressing the problems in accessing and settling loans. The study adopts a mixed research approach to test the hypothesis and answer research questions. Specifically, the study uses survey of SMEs, documentary analysis (documents held by SMEs), and in-depth interviews with banks managers/officials. The study statistically analyses the results of survey and documentary analysis while descriptive research approach was employed for in-depth interviews. Results show that financial institutions were contributing to SMEs growth. Consequently, the relationship between loans from financial institutions and SMEs growth are positive and statistically significant. However, the extents of contribution were very low. Further, it identifies ways of addressing the problems that SMEs face in accessing and settling loans include: flexing terms and conditions, using alternative collateral and credit facilities, refinancing, and postponing maturity period. Finally, the thesis recommends a serious of measures which should be performed by the government and by financial institutions. These include: creation of a level playing field, lowering transactional costs, and commercial banks should reappraise their role. Key words: role, financial institutions, SMEs growth
Implicit Finite Volume and Discontinuous Galerkin Methods for Multicomponent Flow in Unstructured 3D Fractured Porous Media
Creators: name: Moortgat, Joachim
name: Amooie, Mohammad Amin
name: Soltanian, Mohamad Reza
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present a new implicit higher-order finite element (FE) approach to efficiently model compressible multicomponent fluid flow on unstructured grids and in fractured porous subsurface formations. The scheme is sequential implicit: pressures and fluxes are updated with an implicit Mixed Hybrid Finite Element (MHFE) method, and the transport of each species is approximated with an implicit second-order Discontinuous Galerkin (DG) FE method. Discrete fractures are incorporated with a cross-flow equilibrium approach. This is the first investigation of all-implicit higher-order MHFE-DG for unstructured triangular, quadrilateral (2D), and hexahedral (3D) grids and discrete fractures. A lowest-order implicit finite volume (FV) transport update is also developed for the same grid types. The implicit methods are compared to an Implicit-Pressure-Explicit-Composition (IMPEC) scheme. For fractured domains, the unconditionally stable implicit transport update is shown to increase computational efficiency by orders of magnitude as compared to IMPEC, which has a time-step constraint proportional to the pore volume of discrete fracture grid cells. However, when lowest-order Euler time-discretizations are used, numerical errors increase linearly with the larger implicit time-steps, resulting in high numerical dispersion. Second-order Crank-Nicolson implicit MHFE-DG and MHFE-FV are therefore presented as well. Convergence analyses show twice the convergence rate for the DG methods as compared to FV, resulting in two to three orders of magnitude higher computational efficiency. Numerical experiments demonstrate the efficiency and robustness in modeling compressible multicomponent flow on irregular and fractured 2D and 3D grids, even in the presence of fingering instabilities.
description: 24 pages, 3 tables, 10 figures
MOCCA: Runaway merging scenario for IMBH formation in dense star clusters
Creators: name: Hypki, Arkadiusz
Publisher: name: Zenodo
Year: 2023
Subjects: globular star clusters, numerical simulations, IMBH

description: We present preliminary results of formation of IMBHs in dense star clusters through the runaway merging scenario which we performed with MOCCA code for various initial conditions. Recently, the MOCCA code, together with the SSE/BSE code which are used for stellar evolution, was heavily updated. Now, it is possible for MOCCA to form massive main-sequence stars (up to even 7000 MSun) which are seeds for the IMBHs. This is additional channel of IMBH formation with respect to the ones already described in Giersz et al. 2016. Additionally, the MOCCA models were performed with the multiple stellar populations. This forms a unique, large survey of MOCCA models which allows to draw some conclusions about the formation of IMBHs with respect to some global parameters of globular clusters.
The SAMI Galaxy Survey: Revisiting Galaxy Classification Through High-Order Stellar Kinematics
Creators: name: van de Sande, Jesse
name: Bland-Hawthorn, Joss
name: Fogarty, Lisa M. R.
name: Cortese, Luca
name: d'Eugenio, Francesco
name: Croom, Scott M.
name: Scott, Nicholas
name: Allen, James T.
name: Brough, Sarah
name: Bryant, Julia J.
name: Cecil, Gerald
name: Colless, Matthew
name: Couch, Warrick J.
name: Davies, Roger
name: Elahi, Pascal J.
name: Foster, Caroline
name: Goldstein, Greg
name: Goodwin, Michael
name: Groves, Brent
name: Ho, I-Ting
name: Jeong, Hyunjin
name: Jones, D. Heath
name: Konstantopoulos, Iraklis S.
name: Lawrence, Jon S.
name: Leslie, Sarah K.
name: Lopez-Sanchez, Angel R.
name: McDermid, Richard M.
name: McElroy, Rebecca
name: Medling, Anne M.
name: Oh, Sree
name: Owers, Matt S.
name: Richards, Samuel N.
name: Schaefer, Adam L.
name: Sharp, Rob
name: Sweet, Sarah M.
name: Taranu, Dan
name: Tonini, Chiara
name: Walcher, C. Jakob
name: Yi, Sukyoung K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent cosmological hydrodynamical simulations suggest that integral field spectroscopy can connect the high-order stellar kinematic moments h3 (~skewness) and h4 (~kurtosis) in galaxies to their cosmological assembly history. Here, we assess these results by measuring the stellar kinematics on a sample of 315 galaxies, without a morphological selection, using 2D integral field data from the SAMI Galaxy Survey. A proxy for the spin parameter ($λ_{R_e}$) and ellipticity ($ε_e$) are used to separate fast and slow rotators; there exists a good correspondence to regular and non-regular rotators, respectively, as also seen in earlier studies. We confirm that regular rotators show a strong h3 versus $V/σ$ anti-correlation, whereas quasi-regular and non-regular rotators show a more vertical relation in h3 and $V/σ$. Motivated by recent cosmological simulations, we develop an alternative approach to kinematically classify galaxies from their individual h3 versus $V/σ$ signatures. We identify five classes of high-order stellar kinematic signatures using Gaussian mixture models. Class 1 corresponds to slow rotators, whereas Classes 2-5 correspond to fast rotators. We find that galaxies with similar $λ_{R_e}-ε_e$ values can show distinctly different h3-$V/σ$ signatures. Class 5 objects are previously unidentified fast rotators that show a weak h3 versus $V/σ$ anti-correlation. These objects are predicted to be disk-less galaxies formed by gas-poor mergers. From morphological examination, however, there is evidence for large stellar disks. Instead, Class 5 objects are more likely disturbed galaxies, have counter-rotating bulges, or bars in edge-on galaxies. Finally, we interpret the strong anti-correlation in h3 versus $V/σ$ as evidence for disks in most fast rotators, suggesting a dearth of gas-poor mergers among fast rotators.
description: Accepted for Publication in The Astrophysical Journal. 35 pages and 30 figures, abstract abridged for arXiv submission. The key figures of the paper are: 7, 11, 12 , and 14
Impact of Protonation and Hydrogen Bonding Interactions on the Biological Properties of Antibacterial Compound 4-Dimethylaminopyridinium Salicylate Monohydrate: Correlation with Its Precursor Molecules
Creators: name: Tarika, J. D. Deephlin
name: Dexlin, X. D. Divya
name: Rathika, A.
name: kumar, A. Arun
name: Jayanthi, D. Deva
name: Beaula, T. Joselin
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: The hypothetical molecule 4-dimethylaminopyridinium salicylate monohydrate was synthesized and investigated leveraging FT-IR spectra, UV visible, NMR and quantum chemical calculations and also compared with its precursor molecules 4-dimethylamino pyridine and salicylic acid in the present work. To explore the impingement of hydrogen bonding on molecule the geometrical parameters, interaction energies, and vibrational spectra are employed. Natural Bond Orbital analysis indicated the existence of intermolecular hydrogen bonding N–H…O contact, which is mediated by a hyperconjugative interaction between the carbonyl oxygen atom donor and the pyridine ring N–H acceptor. The stretching wavenumber of hydrogen bond donor O–H and hydrogen bond acceptor C–O is red shifted due to elongation in respective bond lengths, according to vibrational analysis. The presence of intermolecular charge transfer from electron-rich pyridine to electron-deficient salicylate is revealed by FMO analysis, and this is corroborated by charge transfer due to excitation. A molecular docking simulation was also executed to better understand the structure-activity relation and further antibacterial tests confirmed that the compound inhibits the bacterial pathogens.
Ulinka Rublack (Ed.), Protestant Empires. Globalizing the Reformations. Cambridge, Cambridge University Press 2020
Creators: name: Pohlig, Matthias
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: 900 Geschichte, Geografie und Hilfswissenschaften

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers (De Gruyter) frei zugänglich.
A machine-learning led search for extra-tidal stars of globular clusters
Creators: name: Wang, Ryan
name: Grondin, Steffani
name: Webb, Jeremy
name: Speagle, Joshua
Publisher: name: Zenodo
Year: 2023

description: Three-body interactions can eject stars from the core of a globular cluster, causing them to enter the Galactic halo as extra-tidal stars. While finding extra-tidal stars is imperative for understanding cluster evolution, connecting isolated extra-tidal field stars back to their birth cluster is extremely difficult since while they maintain similar chemical abundance patterns, they potentially possess different kinematic distributions. In this work, we apply a combination of unsupervised machine learning methods (dimensionality reduction and clustering methods) to try and identify potential extra-tidal candidates for the most known GCs in the APOGEE DR17 data.
title: Gamma-Ray Spectroscopy of Neutron-Deficient Nuclides 129Nd, 131Pm and 132Pm
Creators: name: Sullivan, Conor
Publisher: name: University of Liverpool Repository
Year: 2023

description: The newly commissioned MARA recoil separator has been coupled with the efficient high-purity germanium (HPGe) JUROGAM γ-ray spectrometer and a suite of focal-plane detector systems to facilitate detailed studies of in-beam and isomeric delayed radiation emitted by various types of nuclides. Excited quantum states were populated in the highly neutron-deficient nuclides 129Nd, 131Pm and 132Pm utilising the fusion-evaporation reaction 58Ni + 78Kr > 136 Gd∗. In the study of 129Nd, three new isomeric states were observed at excitation energies of 1893, 2109 and 2284 keV, respectively. The state at 2284 keV was measured to have a half-life of 679 ± 60 ns. Excited states existing above this level were measured using the JUROGAM spectrometer and characterised within the framework of the cranked shell model. The study of 131Pm focused on detailed in-beam γ-ray measurements, resulting in extensions to the yrast band at high and low spin. To accommodate the lowest spin states, reinterpretation of the band in terms of its deformation aligned nature resulted in reassignment of the yrast band to Nilsson orbital [532]5/2−. The lowest spin state of 5/2− is then proposed to be the ground state, in agreement with theoretical studies. Finally, band extensions at high and low spin were made in the study of doubly odd 132Pm. Two low-spin isomeric states were measured, with half-lives of 187 ± 4 ns and 19.9 ± 0.5 μs. γ radiation observed to depopulate these states is proposed to feed the ground state of the this nucleus, allowing unambiguous assignment of absolute excitation energies for two of the four observed bands.
Assignment of VAT Revenue and Decentralization of its Administration: the Case of Ethiopia
Creators: name: Emiru, Alazar
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2009

description: This project tries to look at decentralization of VAT revenue and administration to sub national governments in Ethiopia in light of the international practices. It used individual in-depth interview to collect primary data from Ethiopian revenue and custom Authority (ERCA), Addis Ababa regional city administration tax office and ministry of finance and economic development (MOFED). The methods used for analysis were both qualitative and quantitative. The project discusses the problems in connection with decentralization of VAT administration and assignment of VAT revenue. The project suggests that decentralization of VAT administration needs capable and autonomous regional government and strong central government that could monitor and evaluate decentralization; and the assignment of VAT revenue also needs the central governments' follow up to minimize the distortions and should be applied in consistent with the constitution
Vacuum particle-antiparticle creation in strong fields as a field induced phase transition
Creators: name: Smolyansky, S. A.
name: Panferov, A. D.
name: Blaschke, D. B.
name: Juchnowski, L.
name: Kaempfer, B.
name: Otto, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The features of vacuum particle creation in an external classical field are studied for simplest external field models in $3 + 1$ dimensional QED. The investigation is based on a kinetic equation that is a nonperturbative consequence of the fundamental equations of motion of QED. The observed features of the evolution of the system apply on the qualitative level also for systems of other nature and therefore are rather general. Examples from cosmology and condensed matter physics illustrate this statement. The common basis for the description of these systems are kinetic equations for vacuum particle creation belonging to the class of integro-differential equations of non-Markovian type with fastly oscillating kernel. This allows to characterize processes of this type as belonging to the class of field induced phase transitions.
description: 7 pages, 6 figures
Superconducting gap structure of the skutterudite LaPt4Ge12 probed by specific heat and thermal transport
Creators: name: Pfau, Heike
name: Nicklas, Michael
name: Stockert, Ulrike
name: Gumeniuk, Roman
name: Schnelle, Walter
name: Leithe-Jasper, Andreas
name: Grin, Yuri
name: Steglich, Frank
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigated the superconducting order parameter of the filled skutterudite LaPt4Ge12, with a transition temperature of Tc = 8.3 K. To this end, we performed temperature and magnetic-field dependent specific-heat and thermal-conductivity measurements. All data are compatible with a single superconducting s-wave gap. However, a multiband scenario cannot be ruled out. The results are discussed in the context of previous studies on the substitution series Pr1-xLaxPt4Ge12. They suggest compatible order parameters for the two end compounds LaPt4Ge12 and PrPt4Ge12. This is not consistent with a single s-wave gap in LaPt4Ge12 considering previous reports of unconventional and/or multiband superconductivity in PrPt4Ge12.
description: 8 pages, 4 figures
Identification of Fully Physical Consistent Inertial Parameters using Optimization on Manifolds
Creators: name: Traversaro, Silvio
name: Brossette, Stanislas
name: Escande, Adrien
name: Nori, Francesco
Publisher: name: arXiv
Year: 2016
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper presents a new condition, the fully physical consistency for a set of inertial parameters to determine if they can be generated by a physical rigid body. The proposed condition ensure both the positive definiteness and the triangular inequality of 3D inertia matrices as opposed to existing techniques in which the triangular inequality constraint is ignored. This paper presents also a new parametrization that naturally ensures that the inertial parameters are fully physical consistency. The proposed parametrization is exploited to reformulate the inertial identification problem as a manifold optimization problem, that ensures that the identified parameters can always be generated by a physical body. The proposed optimization problem has been validated with a set of experiments on the iCub humanoid robot.
description: 6 pages, published in Intelligent Robots and Systems (IROS), 2016 IEEE/RSJ International Conference on
Colloidal synthesis of the mixed ionic–electronic conducting NaSbS2 nanocrystals
Creators: name: Zubair, Maria
name: Abdul Ahad, Syed
name: Amiinu, Ibrahim Saana
name: LEBEDEV, VASILY
name: Mishra, Mohini
name: GEANEY, HUGH
name: SINGH, SHALINI
name: RYAN, KEVIN M.
Publisher: name: University of Limerick
Year: 2023
Subjects: subject: Chemical sciences
subject: FOS: Chemical sciences

description: Solution-based synthesis of mixed ionic and electronic conductors (MIECs) has enabled the development of novel inorganic materials with implications for a wide range of energy storage applications. However, many technologically relevant MIECs contain toxic elements (Pb) or are prepared by using traditional high-temperature solid-state synthesis. Here, we provide a simple, low-temperature and size-tunable (50–90 nm) colloidal hot injection approach for the synthesis of NaSbS2 based MIECs using widely available and non-toxic precursors. Key synthetic parameters (cationic precursor, reaction temperature, and ligand) are examined to regulate the shape and size of the NaSbS2 nanocrystals (NCs). FTIR studies revealed that ligands with carboxylate functionality are coordinated to the surface of the synthesized NaSbS2 NCs. The synthesized NaSbS2 nanocrystals have electronic and ionic conductivities of 3.31 × 10−10 (e−) and 1.9 × 10−5 (Na+) S cm−1 respectively, which are competitive with the ionic and electrical conductivities of perovskite materials generated by solid-state reactions. This research gives a mechanistic understanding and post-synthetic evaluation of parameters influencing the formation of sodium antimony chalcogenides materials.
Star Formation In The Cluster Merger DLSCL J0916.2+2953
Creators: name: Mansheim, A. S.
name: Lemaux, B. C.
name: Dawson, W. A.
name: Lubin, L. M.
name: Wittman, D.
name: Schmidt, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate star formation in DLSCL J0916.2+2953, a dissociative merger of two clusters at z=0.53 that has progressed $1.1^{+1.3}_{-0.4}$ Gyr since first pass-through. We attempt to reveal the effects a collision may have had on the evolution of the cluster galaxies by tracing their star formation history. We probe current and recent activity to identify a possible star formation event at the time of the merger using EW(Hd), EW([OII]), and D$_{n}$4000 measured from the composite spectra of 64 cluster and 153 coeval field galaxies. We supplement $Keck$ DEIMOS spectra with DLS and $HST$ imaging to determine the color, stellar mass, and morphology of each galaxy and conduct a comprehensive study of the populations in this complex structure. Spectral results indicate the average cluster and cluster red sequence galaxies experienced no enhanced star formation relative to the surrounding field during the merger, ruling out a predominantly merger-quenched population. We find that the average blue galaxy in the North cluster is currently active and in the South cluster is currently post-starburst having undergone a recent star formation event. While the North activity could be latent or long-term merger effects, a young blue stellar population and irregular geometry suggest the cluster was still forming prior the collision. While the South activity coincides with the time of the merger, the blue early-type population could be a result of secular cluster processes. The evidence suggests that the dearth or surfeit of activity is indiscernible from normal cluster galaxy evolution.
description: 9 figures, 4 tables, approx 22 pages