Miracle-dz/UniFAR-FTUs huggingface dataset:
Motion compensation for a frequency stepped radar

A few hundred MHZ synthetic bandwidth requires the transmission of many (~100) frequency stepped pulses when a small instantaneous bandwidth (<10 MHz) is available. The actual trend in radar imaging is towards wide instantaneous bandwidth (>50 MHz) thanks to improved technology. However the need of retrofit of narrow instantaneous bandwidth to HRR (high range resolution) seems to be still cost effective in the industrial context. In this case the processing time, combined with a large synthetic bandwidth, requires a proper motion compensation of radial target velocity and acceleration. Target kinematics parameters are estimated by minimization of a like-autocorrelation cost function; this technique is capable of detecting minima of aliasing created by uncompensated motion condition. Accuracies are estimated by Monte Carlo simulation and compared to those achievable by entropy and contrast based techniques.
Nonlinear autoregressive leading indicator models of output in G-7 countries

This paper studies linear and nonlinear autoregressive leading indicator models of business cycles in G-7 countries. Our models use the spread between short-term and long-term interest rates as leading indicators for GDP. We examine data admissibility by determining whether these models have the ability to produce time series with classical cycles that resemble the observed classical cycles in the data, and then we ask whether this data admissibility lends itself to better predictions of the probability of recession. Copyright © 2007 John Wiley & Sons, Ltd.
Stochastic estimation of cost frontier: evidence from Bangladesh

In the literature of higher education cost function study, enough knowledge is created in the area of economy scale in the context of developed countries but the knowledge of input demand is lacking. On the other hand, empirical knowledge in the context of developing countries is very meagre. The paper fills up the knowledge gap, estimating a quadratic cost frontier for the public universities in Bangladesh and thereby analysing economies of scale, economies of scope and input demand choice. The study is based on the panel data for Year 2002–2007. Findings show that there are economies of scale up to 350% of the mean output level in the public university, and the critical value of cost-minimizing demand for factor input labour is 48%. The paper shows that an economy of scale has relative advantage over cost-minimizing input choice in minimizing average production cost in the public university.
The international firms as new entrants to the statutory audit market: an empirical analysis of auditor selection in Greece, 1993 to 1997

This paper investigates choice of statutory auditor in Greece in the five years subsequent to the 1992 liberalization of the audit market. We analyse auditor choices by 205 companies which, by 1997, represented almost 90% of companies listed on the Athens Stock Exchange. We find that the level of shareholdings by foreign shareholders is positively associated with choice of a Big Six versus any other auditor both immediately after liberalization in 1993 and still in 1997, indicative of the role of the Big Six in providing audit credibility in the eyes of international investors. In addition, Big Six auditors strengthened their position in the finance sector and, outside the finance sector, among larger companies over the period studied. We also find that in both 1993 and 1997 Big Six firms were distinguished specifically from the second-tier international firms, consistent with the view that, in post-liberalization Greece, companies by their choice of auditor appear to be distinguishing Big Six firms from all others but not between second-tier international firms and local auditors. These findings shed light on the hitherto unresearched area of which companies Big Six auditors target in order to gain market share when they are new entrants in an environment radically changed by regulatory reform. In addition the research extends the auditor name brand reputation debate by its finding that, in post-liberalization Greece, second-tier international firms appear to be distinguished from the Big Six but not from the local audit firms.
Localisation based on Wi-Fi fingerprints: A crowdsensing approach with a device-to-device aim

Crowdsensing is for a few years a new way to gather information. Most smartphones and mobile operating systems provide applications which are able to sense and gather several data from the environment of the device. Thanks to this collected data, it is possible to combine information from several probes. A very common use case is the collection of network scans with location to help the localisation feature of these devices. Nevertheless, most users are not aware of this spying. The collected data might represent infringements of privacy. One possible solution to keep gathering these data while maintaining privacy would consist in device-to-device communications in order to break the links between data and users. In this article we propose an approach to test the feasibility of such a system. We collected data from mobile users to combine location and network scans data. With this data, we test the accuracy level we can reach while using Wi-Fi localisation. We analyse how a new measure should be pushed and how many scans should be realised to provide location-based Wi-Fi. We analyse the minimal dataset to cover the set of locations covered by users and prove that a multi-user gathering system can benefit the users.
Liver function and splanchnic ischemia in critically ill patients.

STUDY OBJECTIVE To investigate the concept that splanchnic ischemia leads to hepatic dysfunction in the critically ill. DESIGN Prospective study and analysis of patient data. SETTING A general ICU in an inner-city London teaching hospital. PATIENTS Twenty-seven consecutive critically ill patients with evidence of inadequate tissue perfusion requiring pulmonary artery catheterization and mechanical ventilation. MEASUREMENTS In all patients, we measured the hepatic metabolism of lidocaine (lignocaine) to monoethylglycinexylidide (MEGX) and the clearance of indocyanine green (both dynamic, flow-dependent tests of hepatic function) over the first 3 days following admission to the ICU. These were compared with results of standard liver function tests and related to tonometric assessment of gastric intramucosal pH (pHim) and outcome. RESULTS There were no significant differences in bilirubin, aspartate aminotransferase, alkaline phosphatase, and prothrombin levels, or in indocyanine green clearance between survivors and nonsurvivors. On day 3, the median MEGX level was higher in survivors than in nonsurvivors (16 vs 2.4 ng/mL, p < 0.001), and the median MEGX level in nonsurvivors fell over the 3 days (20.6 to 2.4 ng/mL, p < 0.002). MEGX levels were significantly correlated with pHim (Spearman rank correlation coefficient [Rs] = 0.69, p < 0.001) as were the changes in the two measurements over the 3 days (Rs = 0.46, p < 0.02). The MEGX formation test and gastric pHim were the most discriminatory with regard to death and survival. CONCLUSIONS Our findings suggest that critically ill patients develop significant hepatic dysfunction that is associated with a poor outcome. This is likely to be due to a mismatch between hepatic metabolic demand and blood flow, and the MEGX formation test appears to be an extremely effective means of assessing liver function and flow in this group of patients.
Europeanization and Bureaucratic Autonomy in the New Member States: A Case Study of the Agricultural Paying Agency in Slovakia

The paper explores the impact of Europeanization on bureaucratic autonomy in the new EU member states using as a case study the Agricultural Paying Agency in Slovakia. The paper shows that Europeanization had limited sustained impact on the personal autonomy of senior officials; however, it requires and sustains the personal autonomy of an extensive cadre of mid-level and junior civil servants. At the same time, it necessitates and continues to sustain significant change in the way agricultural subsidies are distributed, with a high level of autonomy in implementation and a lower, but still significant,measure of autonomy in policy-making. These conclusions can also generally be supported by evidence from Lithuania and Poland. In addition, the coercive elements of Europeanization interacted with the temporarily high bureaucratic autonomy in Slovakia to ‘open’ non-coercive channels of Europeanization of agricultural subsidies and beyond.
Product choice for a firm selling related products: A parimutuel application

This paper provides a framework for analysis of product choice by a multiproduct firm selling several products whose demands are interrelated. The decision making process of a racetrack-racebook regarding the parimutuel wagering products (both number and which ones) it should supply is illustrated. A racetrack-racebook is a business entity, which offers its patrons the opportunity to wager, not only on live horse racing conducted at the racetrack but also on races simulcast to that racetrack from a variety of racetracks, from both in-state and out-of-state locations. The demands for these wagering products are interrelated and these interrelationships play a key role in determining the number (and which ones) of these wagering opportunities that will be supplied. Based on the experience of a specific racetrack-racebook, these demand functions are estimated econometrically and the role of these interrelated demands in the supply decision is explored. An algorithm is developed to search over all possible product portfolios to determine that combination of products yielding the highest sales, revenue, or profit.
Photoinactivation of Hepatitis A Virus by Synthetic Porphyrins¶

Abstract Porphyrins are photosensitizers and may be applicable in situations where viral inactivation is required, as for in vitro inactivation of nonenveloped viruses in blood components or in other aqueous media. No study has examined the efficacy of porphyrin inactivation on human pathogens such as hepatitis A virus (HAV) in plasma or other liquids. Experiments were conducted to evaluate the effect of synthetic porphyrins on HAV in porphyrin-containing human plasma and phosphate-buffered saline exposed to long-wavelength (365 nm) UV light. Inactivation of bacteriophage MS2 (MS2) also was determined in some trials. Solutions containing cationic, anionic or amphiphilic porphyrins irradiated with an average light dose of 4.3 J/cm2 for 90 min resulted in >3 log10 (>99.9%) to >4 log10 (>99.99%) inactivation of both HAV and MS2. Viral inactivation may have been greater than observed because the limits of detection of the assay had been reached. Under ambient lighting conditions, none of the porphyrins was mutagenic in the Ames assay and only the congener with the longest chain-length, tetrakis (N-[n-hexadecyl]-4-pyridiniumyl) porphyrin, was appreciably toxic to mammalian cells. Disinfection by photoactivated synthetic porphyrins therefore can offer an effective and relatively safe approach to removal of nonenveloped viruses from aqueous media.
INPUT–OUTPUT ANALYSIS: THE NEXT 25 YEARS

This year marks the 25th anniversary of the International Input–Output Association and the 25th volume of Economic Systems Research. To celebrate this anniversary, a group of eight experts provide their views on the future of input–output. Looking forward, they foresee progress in terms of data collections, methods, theory testing, and focus and scope.
Has No Child Left Behind Changed the Face of Leadership in Public Schools

A national study examined the perceptions of educational leaders and classroom leaders as to the changes that have occurred in public P-12 schools since the inception of No Child Left Behind. Administrators and teachers who had remained in the same district for five years, and who had been in the field of education since at least 2002, were asked to respond to a comparison of priorities regarding their time resource allocations before and since the implementation of No Child Left Behind. Teachers and administrators shared some common perceptions but differences in their beliefs regarding the value of identified changes became apparent. This study identified some positive and some negative unintended consequences that become the legacy of No Child Left Behind.
Genome-wide Analysis of the Functions of a Conserved Surface on the Corepressor Tup 1

The general transcriptional repressor Tup1 is responsible for the regulation of a large, diverse set of genes in Saccharomyces cerevisiae, and functional homologues of Tup1 have been identified in many metazoans. The crystal structure for the C-terminal portion of Tup1 has been solved and, when sequences of Tup1 homologues from fungi and metazoans were compared, a highly conserved surface was revealed. In this article, we analyze five point mutations that lie on this conserved surface. A statistical analysis of expression microarrays demonstrates that the mutant alleles are deficient in the repression of different subsets of Tup1-regulated genes. We were able to rank the mutant alleles of TUP1 based on the severity of their repression defects measured both by the number of genes derepressed and by the magnitude of that derepression. For one particular class of genes, the mutations on the conserved surface disrupted recruitment of Tup1 to the repressed promoters. However, for the majority of the genes derepressed by the Tup1 point mutants, recruitment of Tup1 to the regulated promoters is largely unaffected. These mutations affect the mechanism of repression subsequent to recruitment of the complex and likely represent a disruption of a mechanism that is conserved in fungi and metazoans. This work demonstrates that the evolutionarily conserved surface of Tup1 interacts with two separate types of proteins— sequence-specific DNA-binding proteins responsible for recruiting Tup1 to promoters as well as components that are likely to function in a conserved repression mechanism.
The effect of researchers' interdisciplinary characteristics on team innovation performance: evidence from university R&D teams in China

This study examines the effect of researchers' characteristics on the performance of R&D teams. Based on the multi-perspective of organization behavior and knowledge management, the authors adopt the framework of ‘Input-Process-Output’ regarding the process of the R&D team as knowledge creation. The theoretical model and corresponding hypotheses were tested empirically, drawing on a sample of 80 R&D teams from four universities in China. We concluded that knowledge communication, sharing, and integration play very important mediated roles in the knowledge creation process of the R&D team. Though researchers might have differing opinions on interdisciplinary research, they still tend toward communication and sharing their knowledge, experience, and viewpoints in the R&D process; this is an essential means for the achievement of knowledge integration. In order to achieve high innovation performance, management should pay attention to the process of knowledge communication, sharing, and integration.
Inferior Vena Cava Filter Placement and Risk of Hematogenous Distant Metastasis in Ovarian Cancer

Background: Recent studies have suggested that inferior vena cava (IVC) filter placement in cancer patients is associated with decreased survival time after insertion. Causality, however, is yet to be understood. This study evaluates (i) the patterns of recurrence or progression of disease; and (ii) survival outcomes of ovarian cancer patients who underwent IVC filter placement. Methods: A total of 274 patients who underwent primary cytoreductive surgery for epithelial ovarian, fallopian tube, and primary peritoneal cancers were identified for analysis. Anatomic location of the first recurrence or progression of disease, progression-free survival, and overall survival were correlated to IVC filter placement status inserted during the perioperative period. Results: Overall, 38 (13.9%) patients underwent perioperative IVC filter insertion, of which 37 (97.4%) were permanently placed. The most common indication was newly diagnosed venous thromboembolism (VTE) (52.6%). Patients with IVC filter placement for VTE were more likely to develop subsequent deep vein thrombosis (25% vs. 7.2%, odds ratio, 4.31, 95% confidence interval, 1.40-13.3, P=0.019), have hematogenous distant metastasis as the site of first recurrence or progression of disease (12-mo hematogenous distant metastasis ratio, 45.2% vs. 13.6%, hazard ratio, 5.10, 95% confidence interval, 2.35-11.1, P<0.001, multivariate analysis), and show decreased survival outcomes (median progression-free survival, 5.7 vs. 15.3 mo, P<0.001: and median overall survival, 22.1 vs. 47.2 mo, P=0.002, both multivariate analysis) when compared with patients without IVC filter placement. Conclusions: Our results suggested that IVC filter placement for VTE in the perioperative period of primary cytoreductive surgery for ovarian cancer may be associated with increased risk of hematogenous distant metastasis and resulted in decreased survival.
Steady‐state priors for vector autoregressions

Bayesian priors are often used to restrain the otherwise highly over-parametrized vector autoregressive (VAR) models. The currently available Bayesian VAR methodology does not allow the user to specify prior beliefs about the unconditional mean, or steady state, of the system. This is unfortunate as the steady state is something that economists usually claim to know relatively well. This paper develops easily implemented methods for analyzing both stationary and cointegrated VARs, in reduced or structural form, with an informative prior on the steady state. We document that prior information on the steady state leads to substantial gains in forecasting accuracy on Swedish macro data. A second example illustrates the use of informative steady-state priors in a cointegration model of the consumption-wealth relationship in the USA. Copyright © 2009 John Wiley & Sons, Ltd.
Changes in Expected Security Returns, Risk, and the Level of Interest Rates

Regression of security returns on treasury bill rates provide insight about the behavior of risk in rational asset pricing models. The information in one-month bill rates implies time variation in the conditional covariances of portfolios of stocks and fixed-income securities with benchmark pricing variables over extended samples and within five-year subperiods. There is evidence of changes in conditional "betas" associated with interest rates. Consumption and stock market data are examined as proxies for marginal utility in a general framework for asset pricing with time-varying conditional covariances. Copyright 1989 by American Finance Association.
Pitfalls of Using Citation Indices for Making Academic Accounting Promotion, Tenure, Teaching Load, and Merit Pay Decisions

With the advent of computerized data searches, the number of accounting programs that use citation analysis to measure faculty members' research productivity has increased—often believing that this methodology offers relevant or reliable data for tenure, promotion, teaching load, and merit pay decisions. But such "objective" bases often ignore such factors as which journals to count, the effect of co-authorships, and article quality. Reliance on such citations can also cause "uneven playing fields" within the accounting discipline as well as among accounting and other areas or departments within schools of business. After reviewing the relevant literature, we present the results of a survey asking accomplished authors about the factors that make them more or less likely to cite an article. Since the process of counting citations focuses on quantity issues as all cita- tions "count" equally regardless of the citation's importance to the research article and the reasons for making the citation, we examine some quality issues that lead to authors citing others' research findings. The survey results indicate that, while citations often are based on the quality of the cited work, other factors less indicative of quality, such as authorship by a friend or colleague and publication in a U.S. journal, help to determine which relevant works are cited or not cited. We also suggest other measures to assess research quality to supplement or replace citation counts.
Aligning Performance Measurement Systems with Strategy: The Case of Environmental Strategy

Alignment of an organization's performance measurement system with its strategy is widely advocated as a guiding principle in management control system design. Despite its importance, it is far from clear what strategic alignment of performance measures entails, whether and how organizations achieve it. In this article we explore the alignment of performance measures focusing on firms' use of environmental performance indicators as the consequence of pursuing an environmental strategy. Based on the economic and contingency literatures on management control system design and performance measurement, we propose that the use of such performance measures is a consequence of changing the design of the performance measurement system to accommodate the strategy, and by increasing the informativeness of performance metrics. We test these propositions in a sample of financial managers in manufacturing firms in The Netherlands. We find that alignment to environmental strategy is mostly achieved through the increased quantification of environmental performance measures and via their increased sensitivity to managerial actions.
Illumination with a Dim Bulb? What Do Social Scientists Learn by Employing Qualitative Data Analysis Software in the Service of Multimethod Designs?

Although there has been much optimistic discussion of integrating quantitative and qualitative findings into sociological analysis, there remains a gap regarding the application of mixed approaches. We examine the potential gains and pitfalls of such integration in the context of the growing analytic power of contemporary qualitative data analysis software (QDAS) programs. We illustrate the issues with our own research in a mixed-methods project examining low fertility in Italy, a project that combines analysis of large nationally representative survey data with qualitative in-depth interviews with women across four cities in Italy. Despite the enthusiasm for mixed-methods research, the available software appears to be underutilized. In addition, we suggest that the sociological research community will want to address several conceptual and inferential issues with these approaches.
Buying Anonymity: An Investigation of Petroleum and Natural Gas Lease Auctions

This paper examines how concealing the existence of private information affects winning bids in a large, well-functioning auction environment. Standard auction theory suggests firms should wish to advertise the existence of private information in order to reduce the bids of their competitors (Milgrom and Weber, 1982). There are a limited number of empirical studies on how concealing the existence of private information affects bids. Instead, most articles test for the presence of private information, rather than the effect of revealing or concealing its existence. An institutional feature of the auctions for petroleum and natural gas leases in Alberta is that firms can hire a broker to bid on their behalf, thereby hiding their identity. Anecdotal evidence suggests rms use brokers to conceal information from their competitors. In order to test the predictions of standard theory, I develop a model of bidding behaviour incorporating the choice to use a broker. The model provides an explicit relationship between broker usage, firms' private information, and equilibrium bids. Using a newly constructed dataset, I estimate this relationship. I find results consistent with standard theory: bids are higher when brokers are used to hide the existence of some private information.