cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Top-Level Managers' 'Business Knowledge' in a Transition Economy: The Case of Ethiopia
Creators: name: Woldesenbet, Kassa
Publisher: name: The Open University
Year: 2007

description: The research reported in this thesis explores the work of knowing which managers bring to their roles in a transition economy context. It focuses on the processes by which a sample of managers in Ethiopia know how to make sense of, and act upon, the differences that make a difference. The point of departure was the contemporary Western construct of 'business knowledge'. But the research problematises this and reveals the processual nature of knowing using a sensemaking perspective. The empirical work involved interviews with 40 top-level managers in five case studies supplemented with 18 interviews with analysts, industry experts and officials at national level. The study found that at the national level, Ethiopian top-level managers' business knowledge tended overall to be uncertain, differentiated, politicised and rapidly evolving. At the organizational level of analysis a number of important differences were revealed in the ways in which these senior managers made sense of the business environment and of their own organizational strategies and capabilities. Four main factors seemed to explain these differences. These were: (a) the degree of perceived reliance on the state for legitimacy and critical resources; (b) the extent to which managers were exposed to market pressures; (c) path dependence; and (d) managers' interpretive orientations. This thesis contributes to the ongoing debates on how top-level managers' judgements on key organisational issues are based upon their sensemaking, their interpretative work and the forms of knowledge which they utilise to frame their decision making. The thesis adds to the conceptualisation and understanding of the nature of managers' knowledge in general and how, in particular, managers make sense of and act upon what they know in a transition economy context. On a wider plane also, this thesis represents a serious attempts to span the cultural divide between, on the one hand, Anglo-centric debates about knowledge and knowing, and, on the other, the Ethiopian business practice. Hence, it offers a novel alternative to the idea that management should be as 'scientific as possible' by illuminating the variety of ways in which different people make sense of experiences in different ways. In doing so, it raises questions about the utility of received thinking about management in various social and cultural contexts.
Electron spin precession in semiconductor quantum wires with Rashba spin-orbit coupling
Creators: name: Valin-Rodriguez, Manuel
name: Puente, Antonio
name: Serra, Llorens
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The influence of the Rashba spin-orbit coupling on the electron spin dynamics is investigated for a ballistic semiconductor quantum wire with a finite width. We monitor the spin evolution using the time-dependent Schrödinger equation. The pure spin precession characteristic of the 1D limit is lost in a 2D wire with a finite lateral width. In general, the time evolution in the latter case is characterized by several frequencies and a nonrigid spin motion.
description: 7 pages, 9 figures
Twin-field quantum digital signatures
Creators: name: Zhang, Chun-Hui
name: Fan, Yu-Teng
name: Zhang, Chun-Mei
name: Guo, Guang-Can
name: Wang, Qin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Digital signature is a key technique in information security, especially for identity authentications. Compared with classical correspondence, quantum digital signatures (QDSs) provide a considerably higher level of security, i.e., information-theoretic security. At present, its performance is limited by key generation protocols (e.g., BB84 or measurement-device-independent protocols), which are fundamentally limited in terms of channel capacity. Fortunately, the recently proposed twin-field quantum key distribution can overcome this limit. This paper presents a twin-field QDS protocol and details a corresponding security analysis. In its distribution stage, a specific key generation protocol, the sending-or-not-sending twin-field protocol, has been adopted and full parameter optimization method has been implemented. Numerical simulation results show that the new protocol exhibits outstanding security and practicality compared with all other existing protocols. Therefore, the new protocol paves the way toward real-world applications of QDSs
description: 10 pages, 4 figures
Bivariate Markov Chains Containing A Failure Process
Creators: name: Flournoy, Nancy
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 49
subject: Mathematical sciences

description: This paper is directed toward the challenge to model dependencies among discrete-state processes. In an earlier motivating application, we used proportional hazards regression models with time-dependent covariates to examine the relationship between relapse following treatment for leukemia, internal biological processes fighting the leukemia, and interventions intended to fix defects in these processes or to stimulate them to behave more aggressively. Complexities in this application led to the introduction of new dependency measures derived from extending Kolmogorov's differential equations. In this paper these dependency measures are interpreted for a bivariate Markov chain where one process is a failure process and another evolves concurrently. Likelihood construction using these dependency measures and others currently used in the context of a failure process are discussed.
Isolate record for VAFB-ISO-832
Creators: name: Holloway, Corinne
Year: 1900
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-832. The artifact is a secondary flake.
title: 'Chinese Architecture' + 'Western Architecture': A False Dichotomy
Creators: name: Li, Hua
Publisher: name: The Open University
Year: 2008

description: For some time, even if this is not expressed explicitly, 'Chinese architecture' and 'western architecture' are conceived and perceived as two homogeneous totalities, in opposition to one another. In consequence, the fast transformation of Chinese cities in the last three decades is often accounted for in terms of the influence of 'western architecture' upon 'Chinese architecture'. Indeed, the urban growth in this period has involved architectural expertise, products, technologies and designs from Europe and the USA. To some people, what is seen as 'new' is 'western', and hence, the transformation is a process of 'westernisation'. However, this is precisely what the thesis argues against. It argues that to use the category of the 'Chinese' and the 'Western' to explain the products of architecture and urbanism in last thirty years China is neither useful nor appropriate. This thesis concerns the issue of 'conceptual translation' of architectural discourse from Europe and the USA into the context of China, as an opposition to 'linguistic translation' which concerns literal meanings of terms. Its examination focuses on the category that the concept 'western modern' indicates in Chinese architecture, and relates its operation and construction to the importation history of European and American architecture throughout the twentieth century, as well as pedagogy of architectural training, regularisation of design principles and methods, identification of architectural profession. practice of the architects' offices, organisation of design competition, and management of the city, mode of marketing and purchase in the real estate market, state politics and cultural interpretations. The analysis reveals that while waves of importation have sustained the formation of architecture as a modern practice in China from the early twentieth century up to now, they have not arrived as symmetrical reflection of what they are in the 'original' context. A difference, in comparison to European and American architecture, can be characterised by the absence of a coherent 'modernism' and the continuity of the modified 'Beaux-Arts' practice in Chinese architecture. Therefore, the assumption of 'westernisation' is wrong in its first place, as there is no such distinction that could be made between the 'Chinese' and the 'Western'.
Terrorism and Poverty: Double Trouble for Macroeconomic Performance in African Countries
Creators: name: Ilyas, Saddam
name: Mehmood, Bilal
name: Aslam, Raees
name: Ilyas, Saddam
name: Mehmood, Bilal
name: Aslam, Raees
Publisher: name: Unknown
Year: 2017
Subjects: subject: Food Security and Poverty
subject: Terrorism
subject: Poverty
subject: Macroeconomic Performance
subject: PMG
subject: MG
subject: DFE

description: This article investigates poverty and terrorism as allies in hindering economic growth in African countries. This study uses data for 22 African countries from 1970 to 2013 i.e. 44 years. Data for terrorism, poverty and national income is taken from GTD and WDI. Panel cointegration techniques of dynamic fixed effect, mean group and pooled mean group are applied to quantify the long-run impact of terrorism and poverty on macroeconomic performance. Moreover, robustness is checked by using various estimators of slope parameters including POLS, FMOLS and DOLS. Empirical findings reveal that both poverty and terrorism have a long-run negative impact the macroeconomic performance. Recommendations for the double trouble are made at the end.
Intra-Regional Agricultural Exports in the East African Community
Creators: name: Ouma, Duncan O.
name: Ouma, Duncan O.
Publisher: name: Unknown
Year: 2017
Subjects: subject: International Relations/Trade
subject: Intra-regional trade
subject: Agricultural exports
subject: East African Community
subject: Regional Integration

description: This study investigated the causes of intra-EAC agricultural exports. Five Augmented gravity models were estimated using the Pseudo Poisson Maximum Likelihood (PPML) Approach. The study used panel data from UNCOMTRADE, International Financial Statistics and World Development Indicators for the period 2000 – 2012 on the five EAC members. The intra-EAC agricultural exports depended on various factors, including GDP of exporter, GDP of the importer, Exchange rate, distance between the economic centers, language similarities, adjacency and population of the exporter. EAC secretariat and respective governments in EAC should also reduce currency value disparities among the member states as a means of promoting intraregional agricultural trade. The proposed monetary union and harmonization of currencies would significantly promote agricultural trade within the region. The EAC member states should also enhance border liberalization, as this will also promote intra-regional agricultural trade, among other measures.
Isolate record for VAFB-ISO-860
Creators: name: Holloway, Corinne
Year: 1900
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-860. The artifact is a primary flake.
Government Expenditure and Economic Growth Nexus: Wagner’s law or Keynesian Hypothesis for Tanzania?
Creators: name: Paul, Fintan
name: Furahisha, Godlove
name: Paul, Fintan
name: Furahisha, Godlove
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural and Food Policy
subject: Government expenditure
subject: Economic growth
subject: Wagner’s law
subject: Keynesian hypothesis
subject: Causality analysis and Tanzania

description: This study investigates the validity of Wagner’s law and Keynesian hypothesis of the longrun relationship between government expenditure and economic growth in Tanzania using annual time series data from 1978 to 2014. The data series were tested for stationarity using Phillips-Perron unit root test and the results revealed that they were all stationary and integrated of order one I(1). The Johansen test of cointegration revealed that there are cointegrating vectors in the system which indicates the existence of long-run equilibrium relationship among the variables. The Granger causality test was performed within vector error correction model and the results revealed strong support for both Wagner’s law and Keynesian hypothesis when government expenditure was taken at its aggregate level. At the disaggregated levels, the results depict that recurrent expenditure and development expenditure from foreign sources promote economic growth hence supporting the Keynesian hypothesis. Wagner’s law was only supported in one instance where causality runs from economic growth to development expenditure from domestic sources. These results highlight the need for policy makers to direct development expenditure from domestic sources to sectors that stimulate economic growth.
Controlling Fano and Dicke effects via a magnetic flux in a double quantum-dot molecule
Creators: name: Orellana, P. A.
name: de Guevara, M. L. Ladron
name: Claro, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The electronic transport through a parallel double quantum-dot molecule attached asymmetrically to leads is studied under a magnetic field. We model the system by means of a non interacting two-impurity Anderson Hamiltonian. We find that the conductance shows Fano and Dicke effects that can be controlled by the magnetic flux.
description: 5 pages, 4 figures, submitted to Phys. Rev. B
Foreign Direct Investment, Economic Growth and Environmental Quality in SubSaharan Africa: A Dynamic Model Analysis
Creators: name: Ojewumi, Sunday Johnson
name: Akinlo, Anthony Enisan
name: Ojewumi, Sunday Johnson
name: Akinlo, Anthony Enisan
Publisher: name: Unknown
Year: 2017
Subjects: subject: International Relations/Trade
subject: Dynamic Interactions
subject: Panel Vector Autoregressive
subject: Panel Vector Error Correction
subject: Cointegration
subject: Impulse-Response
subject: Variance Decomposition

description: The paper investigates the dynamic interactions among the inflow of foreign direct investment, economic growth and environmental quality of the countries in Sub-Saharan Africa (SSA). It seeks to examine the environmental implications of the inflow of foreign direct investment and economic growth of the countries in the sub-region. The dynamic interaction was examined through Panel Vector Autoregressive (PVAR) and Panel Vector Error Correction (PVEC) methodologies on a sample of thirty-three SSA countries. Panel unit root test and panel cointegration test were conducted to determine the degree of stationarity of the variables and long–run relationship among our variables of interest respectively. The results of the empirical analysis showed that dynamic interactions exist among foreign direct investment, economic growth and environmental quality, with the magnitude of influence on one another between 13.1% and 32.8%. The paper suggests that governments of Sub–Saharan African countries should strike a balance between investment friendly policies and environmental protection policies such that foreign direct investment that will be attracted into the region will be those that will improve the environmental quality of the countries in the region.
title: Understanding the Factors Contributing to the Absence of Street Gangs in Milton Keynes: A Negative Aetiology
Creators: name: Conway, Steve
Publisher: name: The Open University
Year: 2024

description: This thesis is concerned with accounting for the apparent absence of street gangs in the new town of Milton Keynes. As a large urban area, with rapid population growth and pockets of extreme deprivation – the borough could reasonably be expected to feature such groups. Addressing the apparent absence, and subsequently formulating explanations involved qualitative interviews with two distinct groups. In the first instance, insights were sought from a range of local professionals who had direct and ongoing contact with the local community. Subsequently, interviews were held with local young people, in order to capture their lived experience in relation to issues which correlate with street gang development in affected areas: deprivation; territoriality; nature and extent of contact with counterparts from neighbouring areas; relationship with the urban space; and identity construction. Young people also took part in a short quantitative mapping exercise, designed to generate insights into the range and character of their urban movement. This mapping exercise is conceived as a meaningful proxy indicator of street gang allegiances, which can be transposed to other urban areas. Four distinct though related themes emerged from the research, which are posited as contributing to the apparent absence of street gangs: historical settlement patterns in the development of the new town; protective elements relating to school catchment areas and civic design; population density and the abundance of space characteristic of the most deprived communities; the availability of alternative identity sources. It is proposed that these factors could be extrapolated to formulate possible approaches to preventing the development of street gangs in other areas; and the alleviation of these issues in communities where they currently exist.
Effects of External Debt on National Savings in Botswana
Creators: name: Oageng, Moreputla
name: Boitumelo, Moffat
name: Oageng, Moreputla
name: Boitumelo, Moffat
Publisher: name: Unknown
Year: 2017
Subjects: subject: Financial Economics
subject: External debt
subject: national savings
subject: Botswana
subject: VECM

description: The main objective of the study was to investigate the effects of external debt on national savings in Botswana using time series economic tools for the period 1980-2014. Annual data for Savings as percentage of GDP, GDP per capita, Exports as percentage of GDP, Exchange rates, Gross Fixed Capital Formation as percentage of GDP, Real interest rates and External Debt as percentage of GDP were examined. Vector Error Correction Model showed that external debt had a negative and statistically significant effect on national savings in Botswana. Furthermore, the results indicated that other variables such as GDP per capita, real interest rates, exports as percentage of GDP and Gross Fixed Capital Formation as a percentage of GDP had a significant influence on savings in Botswana. Due to the negative impact of external debt on national savings the government should put in place additional measures to the existing ones to ensure that these negative effects are turned into positive ones.
Nanoparticle-encapsulated retinoic acid for the modulation of bone marrow hematopoietic stem cell niche
Creators: name: Quartin, Emanuel
name: Rosa, Susana
name: Gonzalez-Anton, Sara
name: Lopez, Laura Mosteo
name: Francisco, Vitor
name: Duarte, Delfim
name: Celso, Cristina Lo
name: Neves, Ricardo Pires das
name: Ferreira, Lino
Publisher: name: The Francis Crick Institute
Year: 2024
Subjects: classificationCode: Tumour Biology
subject: Tumour Biology
classificationCode: Stem Cells
subject: Stem Cells
classificationCode: Human Biology & Physiology
subject: Human Biology & Physiology

description: More effective approaches are needed in the treatment of blood cancers, in particular acute myeloid leukemia (AML), that are able to eliminate resistant leukemia stem cells (LSCs) at the bone marrow (BM), after a chemotherapy session, and then enhance hematopoietic stem cell (HSC) engraftment for the re-establishment of the HSC compartment. Here, we investigate whether light-activatable nanoparticles (NPs) encapsulating alltrans-retinoic acid (RA+NPs) could solve both problems. Our in vitro results show that mouse AML cells transfected with RA+NPs differentiate towards antitumoral M1 macrophages through RIG.1 and OASL gene expression. Our in vivo results further show that mouse AML cells transfected with RA+NPs home at the BM after transplantation in an AML mouse model. The photo-disassembly of the NPs within the grafted cells by a blue laser enables their differentiation towards a macrophage lineage. This macrophage activation seems to have systemic anti-leukemic effect within the BM, with a significant reduction of leukemic cells in all BM compartments, of animals treated with RA+NPs, when compared with animals treated with empty NPs. In a separate group of experiments, we show for the first time that normal HSCs transfected with RA+NPs show superior engraftment at the BM niche than cells without treatment or treated with empty NPs. This is the first time that the activity of RA is tested in terms of long-term hematopoietic reconstitution after transplant using an in situ activation approach without any exogenous priming or genetic conditioning of the transplanted cells. Overall, the approach documented here has the potential to improve consolidation therapy in AML since it allows a dual intervention in the BM niche: to tackle resistant leukemia and improve HSC engraftment at the same time.
Bivariate Markov Chains Containing A Failure Process
Creators: name: Flournoy, Nancy
Publisher: name: American University
Year: 2023

description: This paper is directed toward the challenge to model dependencies among discrete-state processes. In an earlier motivating application, we used proportional hazards regression models with time-dependent covariates to examine the relationship between relapse following treatment for leukemia, internal biological processes fighting the leukemia, and interventions intended to fix defects in these processes or to stimulate them to behave more aggressively. Complexities in this application led to the introduction of new dependency measures derived from extending Kolmogorov's differential equations. In this paper these dependency measures are interpreted for a bivariate Markov chain where one process is a failure process and another evolves concurrently. Likelihood construction using these dependency measures and others currently used in the context of a failure process are discussed.
Weakly Supervised Attention Pyramid Convolutional Neural Network for Fine-Grained Visual Classification
Creators: name: Ding, Yifeng
name: Wen, Shaoguo
name: Xie, Jiyang
name: Chang, Dongliang
name: Ma, Zhanyu
name: Si, Zhongwei
name: Ling, Haibin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Classifying the sub-categories of an object from the same super-category (e.g. bird species, car and aircraft models) in fine-grained visual classification (FGVC) highly relies on discriminative feature representation and accurate region localization. Existing approaches mainly focus on distilling information from high-level features. In this paper, however, we show that by integrating low-level information (e.g. color, edge junctions, texture patterns), performance can be improved with enhanced feature representation and accurately located discriminative regions. Our solution, named Attention Pyramid Convolutional Neural Network (AP-CNN), consists of a) a pyramidal hierarchy structure with a top-down feature pathway and a bottom-up attention pathway, and hence learns both high-level semantic and low-level detailed feature representation, and b) an ROI guided refinement strategy with ROI guided dropblock and ROI guided zoom-in, which refines features with discriminative local regions enhanced and background noises eliminated. The proposed AP-CNN can be trained end-to-end, without the need of additional bounding box/part annotations. Extensive experiments on three commonly used FGVC datasets (CUB-200-2011, Stanford Cars, and FGVC-Aircraft) demonstrate that our approach can achieve state-of-the-art performance. Code available at \url{http://dwz1.cc/ci8so8a}
Searching for structure in complex data: a modern statistical quest
Creators: name: Loh, Po-Ling
Publisher: name: Mathematisches Forschungsinstitut Oberwolfach
Year: 2021

description: Current research in statistics has taken interesting new directions, as data collected from scientific studies has become increasingly complex. At first glance, the number of experiments conducted by a scientist must be fairly large in order for a statistician to draw correct conclusions based on noisy measurements of a large number of factors. However, statisticians may often uncover simpler structure in the data, enabling accurate statistical inference based on relatively few experiments. In this snapshot, we will introduce the concept of high-dimensional statistical estimation via optimization, and illustrate this principle using an example from medical imaging. We will also present several open questions which are actively being studied by researchers in statistics.
description: Snapshots of modern mathematics from Oberwolfach;2021-03
Corruption of the Scientific Method
Creators: name: Flournoy, Nancy
Publisher: name: American University
Year: 2023

description: The scientific method is accepted worldwide as a major group decision-making process. Countries and international organizations rely upon the scientific method in constructing laws, regulations and treaty agreements. We describe how the scientific method has been corrupted by thoughtlessly following a historical prescription that is reinforced by stake-holders with large financial interests. Finally, we conclude with some options for stemming the corruption.
The evaluation of antifungal activity of Tio2 nanoparticles and ethylene diamine tetra acetic acid on growth inhibition of standard strain of Candida albicans.pdf
Creators: name: Mohammadi, Parisa
Publisher: name: figshare
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences

description: Introduction & Objective: In recent years, the incidence of opportunistic fungi has shown a marked increase. Infection caused by common pathogenic fungi is a significant health problem in immune compromised hosts. The present study evaluated antifungal activity of Titanum dioxide nanoparticles and Ethylene Diamine Tetra-acetic Acid against Candida albicans as self-cleaning agent by standard micro dilution test. Materials & Methods: The present study was conducted at the Medical University of Tarbiyat Modares in 2009. TiO2 nanoparticles were obtained through the hydrolysis of TiCl4 (Titanium tetrachloride). Size and type of these nanoparticles were characterized by scanning electron microscopy (SEM) and X-Ray-Diffraction (XRD). Afterwards, the Minimum Inhibitory Concentration (MIC) and Minimal Fungicide Concentration (MFC) test for TiO2 and EDTA were performed. Results: Concentration of synthesised TiO2 was 7.03 mg/ml and 5.63 5.63 ×1020 particles/ml. Evaluation of morphology and diameter of the TiO2 nanoparticles with SEM showed that nanoparticles were spherical with diameter between 40-65 nm. MIC50 of 2.2, 1.24 and 0.125 μg/ml respectively. MIC90 and MFC of TiO2, EDTA and fluconazole were 3.51, 2.48 , 0.5 μg/ml and 4.06, 3.1 ,1 μg/ml respectively. Conclusion: In the present study, using of synthesized TiO2 nanoparticles with chemical method showed a suitable activity against Candida in comparison with Fluconazole. Thus it might represent a good candidates in elimination of Candida in medical from medical devices. Key Words: Antifungal effect, Candida albicans, nanoparticles.
Corruption of the Scientific Method
Creators: name: Flournoy, Nancy
Publisher: name: Eruditio
Year: 2023
Subjects: classificationCode: 5003
subject: Philosophy
subject: FOS: Philosophy, ethics and religion

description: The scientific method is accepted worldwide as a major group decision-making process. Countries and international organizations rely upon the scientific method in constructing laws, regulations and treaty agreements. We describe how the scientific method has been corrupted by thoughtlessly following a historical prescription that is reinforced by stake-holders with large financial interests. Finally, we conclude with some options for stemming the corruption.
Automatic removal of false image stars in disk-resolved images of the Cassini Imaging Science Subsystem
Creators: name: Zhang, Qingfeng
name: Lu, Zhicong
name: Zhou, Xiaomei
name: Zheng, Yang
name: Li, Zhan
name: Peng, Qingyu
name: Long, Shun
name: Zhu, Weiheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Taking a large amount of images, the Cassini Imaging Science Subsystem (ISS) has been routinely used in astrometry. In ISS images, disk-resolved objects often lead to false detection of stars that disturb the camera pointing correction. The aim of this study was to develop an automated processing method to remove the false image stars in disk-resolved objects in ISS images. The method included the following steps: extracting edges, segmenting boundary arcs, fitting circles and excluding false image stars. The proposed method was tested using 200 ISS images. Preliminary experimental results show that it can remove the false image stars in more than 95% of ISS images with disk-resolved objects in a fully automatic manner, i.e. outperforming the traditional circle detection based on Circular Hough Transform (CHT) by 17%. In addition, its speed is more than twice as fast as that of the CHT method. It is also more robust (no manual parameter tuning is needed) when compared with CHT. The proposed method was also applied to a set of ISS images of Rhea to eliminate the mismatch in pointing correction in automatic procedure. Experiment results showed that the precision of final astrometry results can be improve by roughly 2 times than that of automatic procedure without the method. It proved that the proposed method is helpful in the astrometry of ISS images in fully automatic manner.
description: 13 pages, 11 figures, accepted by Research in Astronomy and Astrophysics (RAA)
Simulating finite-time quantum isothermal processes with generic superconducting quantum circuit
Creators: name: Chen, Jin-Fu
name: Li, Ying
name: Dong, Hui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The finite-time isothermal process is fundamental in quantum thermodynamics yet complicated with combination of changing control parameters and the interaction with the thermal bath. Such complexity prevents the direct application of the traditional thermodynamics measurement of the relevant quantities. In this paper, we provide a discrete-step method to separate the work done and the heat exchange in the isothermal process by decomposing the process into piecewise adiabatic and isochoric processes. The piecewise control scheme makes it possible to simulate the whole process on a generic quantum computer, which provides a new platform to experimentally study quantum thermodynamics. We implement the simulation on ibmqx2 to show the $\mathrm{\mathcal{C}/τ}$ scaling of the extra work in the finite-time isothermal process.
description: 9 pages, 5 figures
Isolate record for VAFB-ISO-870
Creators: name: Holloway, Corinne
Year: 1900
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-870. The artifacts are a secondary flake and fragment.
title: Handel's Performing Versions: A Study of Four Music Theatre Works from the 'Second Academy' Period
Creators: name: Vickers, David
Publisher: name: The Open University
Year: 2008

description: The dissertation is a reconstruction and evaluation of the different versions of Handel's operas Partenope and Arianna, and his oratorios Esther and Deborah, as composed and as performed under his direction. The first public performances of all four works were given at the King's Theatre in London during the early 1730s, a period commonly described as 'The Second Academy' (1729-34). Chapter 1 examines the organization of the Second Academy, surveys Handel's opera seasons between 1729 and 1737, and presents hypotheses about the composer's artistic planning during a period of unparalleled independence. This establishes the context for the first public performances of Partenope, Arianna in Creta, Esther and Deborah within Handel's career, and outlines his contemporary revivals of these music dramas. Chapters 2-5 present the four case studies in chronological order of their first performances: each chapter contains an investigation of the work's sources, observations about Handel's compositional process, and descriptions of each performing version prepared under his direction (including those made for Oxford and Dublin).

Chapter 6 assesses the composer's alterations to both the music and the libretto texts of the four works between the first performance of Partenope in 1730 and his last revival of Esther in 1757 (two years before his death). Using examples drawn from all of his versions of the four case studies, the musico-dramatic impact and artistic significance of his revisions are discussed. There is a long-standing assumption that Handel ruined his own music dramas when revising them for revivals: the dissertation takes the unhindered view of Handel's working methods and creative personality across a remarkable span of his working life (1730-57), and presents evidence that all versions need critical consideration.
A Graphical Method for Comparing Response-Adaptive Randomization Procedures
Creators: name: Flournoy, Nancy
name: Haines, Linda M.
name: Rosenberger, William F.
Publisher: name: University of Missouri, University of Cape Town, and George Mason University
Year: 2023
Subjects: classificationCode: 4905
subject: Statistics
subject: FOS: Mathematics

description: Response-adaptive randomization procedures have a dual goal of estimating the treatment effect and randomizing patients with a higher probability of receiving the superior treatment. These are competing objectives, and no procedure in the literature is “perfect” with respect to both objectives. For clinical trials of two treatments, we discuss metrics for comparing response-adaptive randomization procedures that can be represented graphically to compare designs. These metrics involve the simulated distribution of the set of jointly sufficient statistics for estimating functions of the unknown parameters. We explore the binary response and normal cases, and compare numerous procedures found in the literature. We distinguish between metrics of efficiency and metrics that measure ethical cost. Each of these is a function of the joint sufficient statistics. When graphed against each other, we can gauge competing designs in obtaining these competing objectives. We find that, contrary to asymptotic results, tuning parameters that affect the variability of the procedure do not have much impact in the finite case. We also find that procedures that target an optimal allocation based on ethical and efficiency considerations generally provide a better compromise design than procedures that do not.
The Gram Matrix of a PT-symmetric Quantum System
Creators: name: Weigert, Stefan
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The eigenstates of a diagonalizable PT-symmetric Hamiltonian satisfy unconventional completeness and orthonormality relations. These relations reflect the properties of a pair of bi-orthonormal bases associated with non-hermitean diagonalizable operators. In a similar vein, such a dual pair of bases is shown to possess, in the presence of PT symmetry, a Gram matrix of a particular structure: its inverse is obtained by simply swapping the signs of some its matrix elements.
description: 3 pages, no figures
Isolate record for VAFB-ISO-786
Creators: name: Holloway, Corinne
Year: 1900
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Ground Stone
valueUri: https://core.tdar.org/browse/material-type/7/ground-stone
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-786. The artifacts are two ground stone fragments.
EM based Framework for Single-shot Compressive Holography
Creators: name: Kumar, Sanjeev
name: Mahadevappa, Manjunatha
name: Dutta, Pranab Kumar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Optics (physics.optics)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Lensless in-line holography is a simple, portable, and cost-effective method of imaging especially for the biomedical microscopy applications. We propose a multiplicative gradient descent optimization based method to obtain multi-depth imaging from a single hologram acquired in this imaging system. We further extend the method to achieve phase imaging from a single hologram. Negative-log-likelihood functional with the assumption of poisson noise has been used as the cost function to be minimized. The ill-posed nature of the problem is handled by the sparse regularization and the upper-bound constraint. The gradient descent optimization requires calculation of the partial derivative of the cost function with respect to a given estimate of the object. A method of obtaining this quantity for holography in both the cases of real object and complex object has been shown. The reconstruction method has been validated using extensive simulation and experimental studies. The comparison with the previously established iterative shrinkage/thresholding algorithm based compressive holography shows that the proposed method has the following advantages: significantly faster convergence rate, better reconstructed image quality and the ability to perform phase imaging.
FLAME-JIT: Fine-grained Localization of Application Mobile dEfects at Just-in-time
Creators: name: Anonymous, Anonymous
Publisher: name: Zenodo
Year: 2024

description: FLAME-JIT

FLAME-JIT is a predictive model for mobile applications that employs mobile domain-relevant change metrics, utilizing Random Forest, Logistic Regression, and Naive Bayes classifiers, along with N-gram language model integration, to achieve fine-grained defect localization at the Line of Code (LoC) level, demonstrating 80% accuracy in detecting buggy commits and 64% Top10 accuracy in pinpointing defective lines.

Usage

Following are the steps to run the approach to predict and identify buggy lines in the commits.

Step 1

Extract Fixing commits of projects using Issue Tracking System (ITS) .

Step 2

Unzip FLAME JIT.zip and load RA-SZZ as a maven project. Set the database connection and configuration file. Input the path of fix commits extracted in step 1 in config file. Input the path of project repositories in Raszz file an run the project as java project. It will give the labeled buggy and clean data as output.

Step 3

Extract change-features from buggy and clean changes extracted in step 2. We used commmit guru for extracting the features.

Step 4

Run Prediction Model using R. Input the path of change-features of projects and run thr script. It will clasify the buggy and clean commits.

Step 5

Load the localization model as maven project. It will take the data from RA-SZZ and output of the prediction model as input. Input the file paths in defect locator and run it as java project. It identifies buggy lines in the commit and gives csv file as output.

Note:

A sample dataset is also provided in the FLAME JIT.zip. It contains the csv files of the data extracted from Raszz and change features of afwall project.
title: Screening and Information Asymmetry in Early-Stage Venture Capital Markets
Creators: name: Valliere, David C.
Publisher: name: The Open University
Year: 2007

description: This is an examination of early-stage capital markets among venture capital investors and entrepreneurs, and the role information asymmetry plays in influencing the strategies that market participants adopt. It explores the thesis that venture capital investors who operate in early-stage capital markets do so to attract desirable entrepreneurs, and thereby improve the quality of investment opportunities they are presented with. A combination of theoretical arguments and empirical research on venture capital investors frames the types of investors and the reasons they use to justify their operation in early-stage capital markets. An empirical study of entrepreneurs and their capital-sourcing decisions then elucidates the effect of various investor strategies on the decisions of entrepreneurs. This research suggests that venture capitalists are not homogeneous in their approach to this market, and these variations are due to differences in their ability to "screen" investment opportunities. Moreover, investors with particularly high skill will operate in this market to attempt to signal this quality to entrepreneurs, as successful operation in this market does convey private information about the investors skill. Yet, entrepreneurs do not value this signal. When selecting their capital providers, they pay little practical attention to the information this signal conveys. This research contributes to the extension of previous theoretical models of investor screening, by allowing heterogeneity in screening skill, and by developing a range of strategic alternatives that skilled investors can pursue, which are not evident in previous models. This research also contributes to an enhanced understanding of the role of signalling in financial markets with high information asymmetries, by developing a theoretical justification for the emergence of such signals, by demonstrating their formation in early-stage capital markets, and by examining their poor efficacy with respect to one of the target audiences (i.e., entrepreneurs). Finally, this research contributes a novel perspective to our understanding of how early-stage entrepreneurs evaluate potential venture capital investors, and the degree to which their own understanding of this is marred by poor introspection. Through these contributions, this research provides an improved understanding of key elements of the entrepreneurial process in relation to high-growth firms.
Multiple-gap response of type-I noncentrosymmetric BeAu superconductor
Creators: name: Khasanov, Rustem
name: Gupta, Ritu
name: Das, Debarchan
name: Amon, Alfred
name: Leithe-Jasper, Andreas
name: Svanidze, Eteri
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Precise measurements of the thermodynamic critical field ($B_{\rm c}$) in type-I noncentrosymmetric superconductor BeAu were performed by means of the muon-spin rotation/relaxation technique. The temperature evolution of $B_{\rm c}$ can not be described within the single gap scenario and it requires the presence of at least two different types of the superconducting order parameters. The self-consistent two-gap approach, adapted for analysis of $B_{\rm c}(T)$ behavior, suggests the presence of two superconducing energy gaps with the gap to $T_{\rm c}$ ratios $2Δ/k_{\rm B}T_{\rm c}\simeq4.52$ and $\simeq2.37$ for the big and the small gap, respectively. This implies that the superconductivity in BeAu is unconventional and that the supercarrier pairing occurs at various energy bands.
description: 6 pages, 2 figures
Candidates for giant lobes projecting from the LBV stars P Cygni and R 143
Creators: name: Meaburn, J.
name: Boumis, P.
name: Redman, M. P.
name: Lopez, J. A.
name: Mavromatakis, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Deep, wide-field, continuum-subtracted, images in the light of the Halpha+[NII] 6548 & 6584 A and [O III] 5007 A nebular emission lines have been obtained of the environment of the Luminous Blue Variable (LBV) star P Cygni. A previously discovered, receding, nebulous filament along PA 50 deg has now been shown to extend up to 12' from this star. Furthermore, in the light of [O III] 5007 A, a southern counterpart is discovered as well as irregular filaments on the opposite side of P Cygni. Line profiles from this nebulous complex indicate that this extended nebulosity is similar to that associated with middle-aged supernova remnants. However, there are several indications that it has originated in P Cygni and is not just a chance superposition along the same sight-line. This possibility is explored here and comparison is made with a new image of the LBV star R 143 in the LMC from which similar filaments appear to project. The dynamical age of the P Cygni giant lobe of ~5x10^{4} yr is consistent with both the predicted and observed durations of the LBV phases of 50M stars after they have left the main sequence. Its irregular shape may have been determined by the cavity formed in the ambient gas by the energetic wind of the star, and shaped by a dense torus, when on the main sequence. The proper motion and radial velocity of P Cygni, with respect to its local environment, could explain the observed angular and kinematical shifts of the star compared with the giant lobe.
description: 7 pages, 3 figures, accepted for publication in A&A