Miracle-dz/UniFAR-FTUs huggingface dataset:
Nonlinear multigrid for the solution of large‐scale Riccati equations in low‐rank and ℋ︁‐matrix format

The algebraic matrix Riccati equation AX+XAT−XFX+C=0, where matrices A, B, C, F ∈ ℝn × n are given and a solution X ∈ ℝn × n is sought, plays a fundamental role in optimal control problems. Large‐scale systems typically appear if the constraint is described by a partial differential equation (PDE). We provide a nonlinear multigrid algorithm that computes the solution X in a data‐sparse, low‐rank format and has a complexity of 𝒪(n), subject to the condition that F and C are of low rank and A is the finite element or finite difference discretization of an elliptic PDE.
Location choice in New England trawl fisheries: old habits die hard.

In his seminal work on common property resources, H. Scott Gordon proposed that in a fishery with multiple grounds, effort would be distributed such that profit rates would be equal among them. Gordon's model relies on implicit assumptions that are inaccurate and lead to false conclusions in many cases. In this paper, we present an empirically estimated model of fishery and location choice for large trawlers in New England using a random-utility framework with a nested-logit model specification. We use the model to test the validity of a behavioral model developed from ethnographic interviews with skippers.
Comparing motivating work characteristics, job satisfaction, and turnover intention of knowledge workers and blue-collar workers, and testing a structural model of the variables' relationships in China and Japan

This research examines motivating work characteristics, job satisfaction, and turnover intention of knowledge workers and blue-collar workers in China and Japan. The differences in these three variables were, respectively, compared between knowledge workers and blue-collar workers in China and Japan. A structural model of the relationships among the three variables was particularly proposed and investigated. Based on data from an international survey, the characteristics of knowledge workers were first compared with those of blue-collar workers in the same country, and then compared with those of knowledge workers in the other country. Finally, the structural model of the three variables' relationships was examined using a multi-sample analysis of the LISREL method across the countries. There were many significant differences found between knowledge workers and blue-collar workers and between China and Japan. As fundamentally predicted, knowledge workers were found to have higher motivating work characteristics than blue-collar workers in each country. More importantly, a similar structural model of the relationships among the variables was found across the countries.
Improved Direct Interface Circuit for Resistive Full-and Half-Bridge Sensors

Resistive bridge sensors can be directly connected to a microcontroller by using time-based measurement circuits that yield a digital output proportional to the fractional resistance change. However, internal resistances (Rini) of microcontroller pins result in systematic errors. We propose an improved measurement circuit and two time-based equations to compensate for Rini. The proposed circuit and equations have been tested on full- and half-bridge circuits. For both types of bridge, the improved interface circuit and the two novel algorithms reduce the maximal error by a factor greater than two.
Bile acid and cigarette smoke enhance the aggressive phenotype of esophageal adenocarcinoma cells by downregulation of the mitochondrial uncoupling protein-2

Limited information is available regarding mechanisms that link the known carcinogenic risk factors of gastro-esophageal reflux and cigarette smoking to metabolic alterations in esophageal adenocarcinoma (EAC). In the present study, we utilized a novel in-vitro model to examine whether bile acid and cigarette smoke increase the aggressiveness of EAC and whether these changes are associated with metabolic changes. EAC cells (EACC) were exposed to 10 μg/ml cigarette smoke condensate (CSC) and/or 100 μM of the oncogenic bile acid, deoxycholic acid (DCA), for 5 days. These exposure conditions were chosen given their lack of effect on proliferation or viability. DCA and CSC increased invasion, migration, and clonogenicity in EAC cells. These changes were associated with concomitant increases in ATP, ROS, and lactate production indicative of increased mitochondrial respiration as well as glycolytic activity. DCA and CSC exposure significantly decreased expression of uncoupling protein-2 (UCP2), a mitochondrial inner membrane protein implicated in regulation of the proton gradient. Knockdown of UCP2 in EACC phenocopied DCA and CSC exposure as evidenced by increased cell migration, invasion, and clonogenicity, whereas over-expression of UCP2 had an inverse effect. Furthermore, over-expression of UCP2 abrogated DCA and CSC-mediated increases in lactate and ATP production in EACC. DCA and CSC promote the aggressive phenotype of EACC with concomitant metabolic changes occurring via downregulation of UCP2. These results indicate that UCP2 is integral to the aggressive phenotype of EACC. This mechanism suggests that targeting alterations in cellular energetics may be a novel strategy for EAC therapy.
Factors Affecting Auditors' Assessments of Planning Materiality

This study investigates the planning materiality values used by auditors in The Netherlands for a sample of engagements performed by Big 5 and non‐Big 5 firms in 1998–99. We find that, consistent with archival evidence from KPMG in Elliott (1983), planning materiality is not a constant percentage of a base, but increases at a decreasing rate with client size. In addition, we find that planning materiality values increase with the quality of the client's control environment and the magnitude of the client's rate of return on assets, while decreasing with the complexity of the client. We also find that Big 5 firms use lower planning materiality values than non‐Big 5 firms, ceteris paribus, which is consistent with the production of relatively higher audit quality levels by the Big 5. Finally, we find that auditors use lower materiality values in situations where earnings might be managed to show a small profit or a small loss.
Introducing Environmental Externalities into Transport Pricing: Measurement and Implications

Abstract It is European Commission policy to charge modes of transport according to the marginal social cost of their use of the infrastructure, including environmental costs. However, progress in implementing this process has been slow, partly because of the difficulty of measuring and valuing these costs. This need has led to a great deal of research in this area in recent years. The paper presents the results of some of this research, and in particular of the European Commission‐funded Unification of Accounts and Marginal Costs for Transport Efficiency (UNITE) project. UNITE used the Impact Pathway Approach developed in the ExternE project series to provide a bottom‐up methodology for the estimation and valuation of marginal social costs of transport, taking into account the diversity of circumstances in terms of location (e.g. population density, and speed and direction of winds) and time of day. The paper first explains the approach used for the measurement and valuation of environmental costs and then presents results on both total and marginal costs. It then discusses the results of a parallel project using the same methodology that estimated the marginal social cost of road use at a very disaggregate level for different vehicle types, locations, types of road and times of day for Great Britain. The results show that off the main network and outside the conurbations, private cars are currently overcharged, but elsewhere they are charged too little, particularly in the main conurbations. Buses, and even more so heavy goods vehicles, are undercharged to a greater extent. Only a kilometre‐based charging system capable of charging at different rates by vehicle type, type and location of road, and time of day is capable of reflecting all these differences; due to the development of global positioning satellite (GPS) technology, such systems are now becoming available.
Methodology of detailed dosimetry and treatment of uncertainty and variations for in vivo studies

Detailed and accurate dosimetric information is a basic precondition for acquiring adequate interpretations and valuations of in vivo studies testing radiofrequency (RF) electromagnetic fields (EMF). Instantaneous locally induced fields depend on many parameters, for example, orientation of the animal with respect to the incident field, animal size and posture, and tissue distribution. These parameters are often constrained, resulting in significant uncertainties in the dosimetric assessment of the exposure, averaged over all animals and the entire experimental phase, as well as in significant variations of the local exposures during the experiment. A sufficient analysis should therefore include (1) average and peak spatial specific absorption rate (SAR) values for the whole body and specific organs, (2) the uncertainty of each assessed SAR value, and (3) the short term and long term SAR variations between the tissues of individual animals. A methodology to obtain this pertinent information is developed and proposed in this paper. Using this methodology the dosimetry of a rat exposure apparatus operating at the carrier frequency of 1747 MHz, previously developed for a 2‐year bioassay study within the European Union project PERFORM, was obtained. We have demonstrated that comprehensive dosimetric data can be obtained with reasonable effort using the proposed method, providing that the exposure setup is soundly formulated. Bioelectromagnetics 27:378–391, 2006. © 2006 Wiley‐Liss, Inc.
Dividend catering and the information content of dividend changes

Abstract This paper reexamines the information content of dividend changes by taking into account the catering incentives of dividends. Dividend premium is defined to measure the irrationality of investors who are willing to pay a premium for dividend paying firms regardless of their earnings prospects. We find that investors’ preference for dividends outweighs signaling in firms’ dividend payout decision. Managers signal by changing dividends only when the market appreciates the changes. Specifically, during periods in which investors’ preference for dividend is stable, the signaling hypothesis is supported if market dividend premium is negative and firms decrease their dividend payout, and if market dividend premium is positive and firms increase their dividend payout. When the market dividend preference fluctuates, on the other hand, the signaling hypothesis is valid only if the dividend premium is positive and firms increase their dividend payout.
Trace elements and oxidative stress in chronic obstructive pulmonary disease.

OBJECTIVES Many trace elements have activator or inhibitor roles in the antioxidative defense systems in diseases such as chronic obstructive pulmonary diseases (COPD). In this study, we aimed to show the levels of trace elements with action in oxidative stress, and to show the levels of malondialdehyde (MDA) as a marker of oxidative stress, and the activity of paraoxonase (PON1) as an antioxidant in COPD and smokers. METHODS We included 25 patients with COPD, and 20 healthy non-smokers in the study. We selected them from the hospitalized patients at the Hospital of Dicle University, Turkey, between April 2003 and January 2004. The clinical condition of the patients was stable. RESULTS The serum copper (Cu) and MDA concentrations in COPD patients were higher than the control group. There were no differences in zinc (Zn) concentration and Cu/Zn ratio between COPD patients and the control group. We found lower serum PON1 activities in COPD patients compared with the control group. There was no statistically significant difference in Zn concentration and Cu/Zn ratio between smokers and non-smokers in COPD. There were statistically significant differences in Cu, MDA concentrations and serum PON1 activities between smokers and non-smokers in COPD. CONCLUSION We could suggest that trace elements such as Cu, oxidants and antioxidants such as MDA and PON1 have roles in oxidative stress, and in COPD.
Anterior Cruciate Ligament Reconstruction Autograft Choice: Bone-Tendon-Bone versus Hamstring

Anterior cruciate ligament graft choice is controversial, with no evidence-based consensus available to guide decision making. The study design was evidence-based medicine systematic review of randomized controlled trials evaluating patellar tendon versus hamstring tendon autografts. A literature review identified 9 randomized controlled trials comparing patellar tendon and hamstring tendon autografts. An evidence-based systematic review was performed. Objective and subjective outcomes of interest included surgical technique, rehabilitation, instrumented laxity, isokinetic strength, patellofemoral pain, return to preinjury activity, and Tegner, Lysholm, Cincinnati, and International Knee Documentation Committee–1991 scores. Additional surgery, graft failure, and complications were reviewed. Slight increased laxity on arthrometer testing was seen in the hamstring population in 3 of 7 studies. Pain with kneeling was greater for the patellar tendon population in 4 of 4 studies. Only 1 of 9 studies showed increased anterior knee pain in the patellar tendon group. Frequency of additional surgery seemed to be related to the fixation method and not graft type. No study reported a significant difference in graft failure between patellar tendon and hamstring tendon autografts. Objective differences (range of motion, isokinetic strength, arthrometer testing) were not detected between groups in the majority of studies, suggesting that their sensitivity to detect clinical outcomes may be limited. Increased kneeling pain in the patellar tendon group was seen consistently in the studies evaluated. Subjective differences in anterior knee pain or return-to-activity level were not consistently observed in these studies. With numbers available, failure rates were not significantly different between groups. These findings suggest that graft type may not be the primary determinant for successful outcomes after anterior cruciate ligament surgery.
The MAPKK FgMkk1 of Fusarium graminearum regulates vegetative differentiation, multiple stress response, and virulence via the cell wall integrity and high-osmolarity glycerol signaling pathways.

Mitogen-activated protein (MAP) kinases play crucial roles in regulating fungal development, growth and pathogenicity, and in responses to the environment. In this study, we characterized a MAP kinase kinase FgMkk1 in Fusarium graminearum, the causal agent of wheat head blight. Phenotypic analyses of the FgMKK1 mutant (ΔFgMKK1) showed that FgMkk1 is involved in the regulation of hyphal growth, pigmentation, conidiation, deoxynivalenol biosynthesis and virulence of F. graminearum. ΔFgMKK1 also showed increased sensitivity to cell wall-damaging agents, and to osmotic and oxidative stresses, but exhibited decreased sensitivity to the fungicides iprodione and fludioxonil. In addition, the mutant revealed increased sensitivity to a biocontrol agent, Trichoderma atroviride. Western blot assays revealed that FgMkk1 positively regulates phosphorylation of the MAP kinases Mgv1 and FgOs-2, the key component in the cell wall integrity (CWI) and high-osmolarity glycerol (HOG) signalling pathway respectively. Yeast two-hybrid assay indicated that Mgv1 interacts with a transcription factor FgRlm1. The FgRLM1 mutant (ΔFgRLM1) showed increased sensitivity to cell wall-damaging agents and exhibited decreased virulence. Taken together, our data indicated that FgMkk1 is an upstream component of Mgv1, and regulates vegetative differentiation, multiple stress response and virulence via the CWI and HOG signalling pathways. FgRlm1 may be a downstream component of Mgv1 in the CWI pathway in F. graminearum.
Human resources in Vietnam: The global challenge

This article takes a critical look at the management of people in Vietnam. It examines the prevailing business environment and the reform process and their implications for skill formation and the development of managerial expertise. The analysis then proceeds to examine on a thematic basis some specific human resource practices in four firms based in Hanoi—two state-owned enterprises and two multinationals. The article analyzes the traditional and emergent human resource practices showing how they reflect industrial and historical-cultural contextual factors. The discussion also considers the suitability and adequacy of these practices while locating them within the international human resource management debate. This article thus contributes to the critique of global human resource management by exploring the relevance of mainstream human resource theory and practice to the Vietnamese case, especially given the increasing role of multinational firms in the Vietnamese economy. © 2001 John Wiley & Sons, Inc.
Investigative management and consumer research on the internet

Purpose – This paper aims to introduce the notion of investigative research on the internet (IRI) and conceptualise its processes through the principle of streaming. It seeks to discuss the similarities and differences between IRI and netnography and considers various aspects of the IRI process, including site selection, sampling, data collection and analysis.Design/methodology/approach – Investigative internet‐based research uses the techniques of ethnography and netnography, including variations of participant observation and analysis of visual and textual material. Three international empirical cases are used to illustrate the application of IRI and streaming in research on international workers, consumer cultures and on emerging business phenomena.Findings – IRI has a number of potential applications for hospitality management academics and practitioners. Streaming can help to understand the processes involved in conducting netnographic research, and streaming is a more appropriate way to conceptualis.
Institutions in Transition: Land Ownership, Property Rights, and Social Conflict in China

China's urban sprawl has led to serious social cleavages. Unclear land and property rights have resulted in an uneasy alliance between real estate companies and local authorities, with most willing to strike illegal deals over land. The results have been devastating. Farmers live in fear that the land they till today will be gone tomorrow, while urban citizens are regularly evicted from their homes to make way for new skyscrapers and highways. These shocking incidents underscore the urgency of the land question in China. The recent conviction of the Chinese Minister for Land Resources and the forced evictions that have led to the injury and death of ordinary Chinese citizens highlight the case for land reform. Against this backdrop, many scholars criticize China's lack of privatization and titling of property. This monograph, however, demonstrates that these critically depend on timing and place. Land titling is imperative for the wealthier regions, yet, may prove detrimental in areas with high poverty. The book argues that China's land reform can only succeed if the clarification of property rights is done with caution and ample regard for regional variations.
Transferring Organizational Practices and the Dynamics of Hybridization: Japanese Retail Multinationals in China

Detailed case study research conducted at Japanese multinational retail firms in both their home country and their subsidiaries in China is undertaken to assess a range of prominent theoretical perspectives that have been used to account for the transfer of organizational practices. Approaches based upon culturalist, national business systems, industry sector, international division of labour, and agency perspectives are shown to be inadequate, individually, to account for the complex patterns of transfer, local adoption, and adaptation in these multinational companies. These findings highlight the value of conceptual bricolage and multi-level analysis for developing explanations that can encompass and explicate complex patterns of hybridization. The paper also identifies important factors in the dynamics of hybridization that have been neglected or downplayed in much of the existing literature. These include the significance of context specific, firm level perceptions of sources of competitive advantage as a key motive encouraging transfer of parent company practices. Crucial factors constraining transfer are the practices and norms prevalent in local labour markets. Additionally, transfer by multinational companies to transitional economies with high levels of deinstitutionalization illustrates problematic dimensions for various theoretical perspectives, including influential neo-institutionalist models.
Going to church: attitudes to church attendance amongst Australian core Catholic youth

Religious communities have an obvious interest in passing on their beliefs and practices to future generations. Many traditional churches, however, report major difficulties in retaining the interest and involvement of adolescents. This study seeks to explore attitudes to a key indicator of traditional practice, church attendance, amongst Australian core Catholic youth (14–15 years of age). Fifty‐eight semi‐structured interviews were conducted with adolescents with a pre‐existing connection with parish communities. Most adolescents interviewed expressed either strong or weak familial pattern of church attendance and predicted a likely decrease in their future participation. This, coupled with the experience of older siblings' reported views about the significance of the Eucharist and a lack of supportive social networks either at school or in the wider community, suggests that many core Catholic adolescents are likely to become less involved in church life in the future.
Impact of postoperative radiation therapy and other perioperative factors on outcome after orthopedic stabilization of impending or pathologic fractures due to metastatic disease.

PURPOSE AND METHODS We reviewed 64 orthopedic stabilization procedures in 60 consecutive patients diagnosed with metastatic disease to previously unirradiated femurs, acetabula, and humeri with pathologic or impending pathologic fracture. Thirty-five patients who received adjuvant postoperative radiation therapy were compared with 29 patients who were treated with surgery alone. Many potential perioperative and tumor prognostic variables were evaluated. RESULTS On univariate analysis, surgery plus radiation therapy and prefracture functional status were the only significant predictors of patients who achieved normal use of the extremity (with or without pain) after surgery; on Cox multivariate analysis, only postoperative radiation therapy was significant (P = .02). Surgery-related factors such as use of methylmethacrylate, location of fracture, and type of surgery were not associated with improved functional status. The estimated probability of achieving normal use of the extremity (with or without pain) any time was 53% for postoperative radiation therapy versus 11.5% for surgery alone (P < .01). Second orthopedic procedures to the same site were more frequent in the group that received surgery alone. The actuarial median survival duration of the surgery-alone group was 3.3 months, compared with 12.4 months for the postoperative radiation therapy group (P = .02). CONCLUSION While this study is limited by possible unaccountable selection biases, only postoperative radiation therapy was associated with patients regaining normal use of their extremity (with or without pain) and undergoing fewer reoperations to the same site. The improved overall survival associated with postoperative radiation therapy may represent selection bias.