Miracle-dz/UniFAR-FTUs huggingface dataset:
Organizing Data Governance: Findings from the Telecommunications Industry and Consequences for Large Service Providers

Many companies see Data Governance as a promising approach to ensuring data quality and maintaining its value as a company asset. While the practitioners' community has been vigorously discussing the topic for quite some time, Data Governance as a field of scientific study is still in its infancy. This article reports on the findings of a case study on the organization of Data Governance in two large telecommunications companies, namely BT and Deutsche Telekom. The article proposes that large, service-providing companies in general have a number of options when designing Data Governance and that the individual organizational design is context-contingent.Despite their many similarities, BT and Deutsche Telekom differ with regard to their Data Governance organization. BT has followed a more project-driven, bottom-up philosophy; Deutsche Telekom, on the other hand, favors a rather constitutive, top-down approach. The article also proposes a research agenda for further studies in the field of Data Governance organization.
Integrating force-sensing and signaling pathways in a model for the regulation of wing imaginal disc size

The regulation of organ size constitutes a major unsolved question in developmental biology. The wing imaginal disc of Drosophila serves as a widely used model system to study this question. Several mechanisms have been proposed to have an impact on final size, but they are either contradicted by experimental data or they cannot explain a number of key experimental observations and may thus be missing crucial elements. We have modeled a regulatory network that integrates the experimentally confirmed molecular interactions underlying other available models. Furthermore, the network includes hypothetical interactions between mechanical forces and specific growth regulators, leading to a size regulation mechanism that conceptually combines elements of existing models, and can be understood in terms of a compression gradient model. According to this model, compression increases in the center of the disc during growth. Growth stops once compression levels in the disc center reach a certain threshold and the compression gradient drops below a certain level in the rest of the disc. Our model can account for growth termination as well as for the paradoxical observation that growth occurs uniformly in the presence of a growth factor gradient and non-uniformly in the presence of a uniform growth factor distribution. Furthermore, it can account for other experimental observations that argue either in favor or against other models. The model also makes specific predictions about the distribution of cell shape and size in the developing disc, which we were able to confirm experimentally.
The properties of the heterogeneous Shakhbazyan groups of galaxies in the SDSS

We present a systematic study of the sub-sample of Shakhbazyan groups (SHKs) covered by the Sloan Digital Sky Survey Data Release–5 (SDSS-5). SHKs probe an environment with characteristics which are intermediate between those of loose and very compact groups. Surprisingly, we found that several groups identifying algorithms (e.g. Berlind et al. 2006, Tago et al. 2008) miss this type of structures. Using the SDSS5 spectroscopic data and the photometric redshifts derived in D’Abrusco et al. (2007), we identified possible group members in photometric redshift space and derived, for each group, several individual properties (richness, size, mean photometric redshift, fraction of red galaxies etc.). We also combined pointed and stacked Rosat All Sky Survey (RASS) data to investigate the X-ray luminosities of these systems. Our study confirms that the majority of groups are physical entities with richness in the range 3–13 galaxies, and properties ranging between those of loose and compact groups. We confirm that SHK groups are richer in early-type galaxies than the surrounding environment and the field, as expected from the morphology-density relation and from the selection of groups of red galaxies. Furthermore, our work supports the existence of two sub-classes of structures, the first one being formed by compact and isolated groups and the second formed by extended structures. We suggest that while the first class of objects dwells in less dense regions like the outer parts of clusters or the field, possibly sharing the properties of Hickson Compact Groups, the more extended structures represent a mixture of [core+halo] configurations and cores of rich clusters. X-ray luminosities for SHKs are generally consistent with these results and with the expectations for the LX σv relation, but also suggest the velocity dispersions reported in literature are underestimated for some of the richest systems.
Diagnostic inference in performance evaluation: effects of cause and event covariation and similarity*

This study experimentally tests some implications of psychological diagnostic inference theories and begins to extend these theories into a performance evaluation context. Subjects, who were required to assume the role of a manufacturing division manager, were asked to estimate the likelihoods of four potential causes of an assembly department's labor efficiency variance. The subjects were asked to reevaluate their causal likelihoods following: 1) evidence concerning the magnitude of the labor variance and the deviations of the four potential causes from their normal levels (similarity evidence) and 2) evidence concerning the covariation of a potential cause, and labor efficiency variances over the past five years (covariation evidence). The results generally confirmed a set of hypotheses predicting the effects of cause/event similarity and covariation upon individuals' causal inferences. Implications of these results for accounting information systems design are discussed in a concluding section. Resume. Cette etude teste, au moyen d'une experience, quelques-unes des conclusions des theories d'inference diagnostique psychologique et amorce l'application de ces theories dans un contexte d'evaluation de la performance. Les sujets, qui devaient assumer le role de directeur d'une division de fabrication, ont ete invites a estimer les probabilites de quatre causes possibles de l'ecart de rendement sur main-d'œuvre d'un atelier d'assemblage. Les sujets furent invites a reevaluer leurs probabilites causales selon: 1) des informations relatives a l'ampleur de l'ecart sur main-d'œuvre et a la dispersion des quatre causes potentielles par rapport a leur niveau normal (preuve de similitude) et 2) des informations relatives a la co-variation d'une cause potentielle, et aux ecarts de rendement sur maind'œuvre des cinq dernieres annees (preuve de co-variation). De facon generale, les resultats confirment l'ensemble des hypotheses prevoyant les effets de similitude et de co-variation cause/evenement sur les inferences causales des individus. Les consequences de ces resultats sur la conception des systemes d'information comptable sont examinees dans la conclusion.
Understanding the Impact of Emerging Technologies on Process Optimization: The Case of RFID Technology

This paper examines the case of one supply chain in the electricity sector where RFID technology integrated with firm's information systems acts as an enabler of process optimization. Using a business process approach and laboratory simulation, we explain how the implementation of RFID technology can increase the visibility of information at various layers of the supply chain, allowing members to gather precise information on real demand and improve replenishment processes. On the other hand, while RFID technology has the potential to automate some processes, human intervention is still required. Therefore, use case scenarios and sensitivity analysis should be carefully considered when selecting the proper design (architecture options) for the virtual and hardware components of RFID systems. The choice of the appropriate configuration needs to be integrated in the firm's strategies and supply chain partner's vision.
Aerodynamic Design on Unstructured Grids for Turbulent Flows

An aerodynamic design algorithm for turbulent flows using unstructured grids is described. The current approach uses adjoint (costate) variables for obtaining derivatives of the cost function. The solution of the adjoint equations is obtained using an implicit formulation in which the turbulence model is fully coupled with the flow equations when solving for the costate variables. The accuracy of the derivatives is demonstrated by comparison with finite-difference gradients and a few example computations are shown. In addition, a user interface is described which significantly reduces the time required for setting up the design problems. Recommendations on directions of further research into the Navier Stokes design process are made.
Assisting Service Providers In Peer-to-peer Marketplaces: Maximizing Gain Over Flexible Attributes

Peer to peer marketplaces such as AirBnB enable transactional exchange of services directly between people. In such platforms, those providing a service (hosts in AirBnB) are faced with various choices. For example in AirBnB, although some amenities in a property (attributes of the property) are fixed, others are relatively flexible and can be provided without significant effort. Providing an amenity is usually associated with a cost. Naturally different sets of amenities may have a different "gains" for a host. Consequently, given a limited budget, deciding which amenities (attributes) to offer is challenging. In this paper, we formally introduce and define the problem of Gain Maximization over Flexible Attributes (GMFA). We first prove that the problem is NP-hard and show that identifying an approximate algorithm with a constant approximate ratio is unlikely. We then provide a practically efficient exact algorithm to the GMFA problem for the general class of monotonic gain functions, which quantify the benefit of sets of attributes. As the next part of our contribution, we focus on the design of a practical gain function for GMFA. We introduce the notion of frequent-item based count (FBC), which utilizes the existing tuples in the database to define the notion of gain, and propose an efficient algorithm for computing it. We present the results of a comprehensive experimental evaluation of the proposed techniques on real dataset from AirBnB and demonstrate the practical relevance and utility of our proposal.
Differential Effect of Luminance Contrast Reduction and Noise on Motion Induction

Motion perception in a region is affected by motion in the surround regions. When a physically static or flickering stimulus surrounded by moving stimuli appears to move in the direction opposite to that of the surround motion, it is referred to as motion contrast. When the centre appears to move in the same direction, it is referred to as motion assimilation. We investigated how noise and luminance contrast affect motion induction by employing static and dynamic counterphase flickering targets. The tendency of motion assimilation was found to be stronger at a high noise level than at a low noise level for both static and dynamic targets. On the other hand, a decrease of luminance contrast tended to strengthen the tendency of motion contrast. However, the addition of noise and the decrease of luminance contrast decreased the visibility of motion comparably. These results suggest that the visual system changes the mode of motion induction according to the noise level, but not the visibility.
Genetic analysis of Ia determinants expressed on Con A-reactive cells.

Pretreatment of mouse lymphoid cells with anti-Ia sera and C abrogated the proliferative responses of these cells to Con A. Studies were carried out with several anti-Ia reagents and intra-H-2 recombinant mouse strains to map the I subregion(s) whose products are expressed on Con A-reactive cells. Treatment with a (B10.A X A)F1 anti-B10 reagent and C abrogated the ability of BALB/c cells to respond to Con A. Absorption studies on this reagent demonstrated that Con A-reactive cells express Ia determinants coded by the I-A subregion. The results with two additional reagents, B10.A(4R) anti-B10.A(2R) tested on B10.BR cells and (B10 X D2.GD)F1 anti-B10.D2 absorbed with B10.A cells and tested on BALB/c cells, demonstrated that Con A-reactive cells also express Ia determinants encoded to the right of I-A. Several antisera and strain combinations were evaluated in which the antisera could contain antibodies specific for products of genes encoded by the I-J subregion, but the results were inconclusive. These data demonstrate that there are at least two different I subregions, one in I-A and one to the right of I-A, that code for antigens expressed on Con A-reactive cells.
CROSS SECTIONAL ANALYSIS OF ENDODONTIC FAILURE IN PIMS

The purpose of this study was to determine the different reasons for root canal failure in the department of dentistry at Pakistan Institute of Medical Sciences. It was a cross sectional study which was based on collection and interpretation of data. Seventy patients of both genders were selected from dental out patient department of PIMS. All patients selected, presented with post endodontic complaints. Majority of the endodontic failures, reported with periapical infection or pain on percussion. The main reason for endodontic failure was unfilled or untreated root canals, followed by underextended and overextended root canal fillings.
Morphological characterization of the cholesteryl ester cycle in cultured mouse macrophage foam cells

Mouse peritoneal macrophages can be induced to accumulate cholesteryl esters by incubating them in the presence of acetylated low density lipoprotein. The cholesteryl esters are sequestered in neutral lipid droplets that remain in the cell even when the acetylated low density lipoprotein is removed from the culture media. Previous biochemical studies have determined that the cholesterol component of cholesteryl ester droplets constantly turns over with a half time of 24 h by a cyclic process of de-esterification and re-esterification. We have used morphologic techniques to determine the spatial relationship of cholesteryl ester, free cholesterol, and lipase activity during normal turnover and when turnover is disrupted. Lipid droplets were surrounded by numerous 7.5-10.0-nm filaments; moreover, at focal sites on the margin of each droplet there were whorles of concentrically arranged membrane that penetrated the matrix. Histochemically detectable lipase activity was associated with these stacks of membrane. Using filipin as a light and electron microscopic probe for free cholesterol, we determined that a pool of free cholesterol was associated with each lipid droplet. Following incubation in the presence of the exogenous cholesterol acceptor, high density lipoprotein, the cholesteryl ester droplets disappeared and were replaced with lipid droplets of a different lipid composition. Inhibition of cholesterol esterification caused cholesteryl ester droplets to disappear and free cholesterol to accumulate in numerous myelin-like structures in the body of the cell.
Magnetic Field Interactions of Copper-Containing Intrauterine Devices in 3.0-Tesla Magnetic Resonance Imaging: In Vivo Study

Objective An ex vivo study found a copper-containing intrauterine device (IUD) to be safe for women undergoing an MRI examination at a 3.0-T field. No significant artifacts caused by the metallic implant were detected. However, there are still no in vivo data about these concerns. The aim of this study was to evaluate 3.0-T magnetic field interactions of copper-containing IUDs in vivo. Materials and Methods Magnetic field interactions and potential adverse events were evaluated in 33 women using a questionnaire-based telephone survey. Two experienced radiologists performed artifact evaluation on MR images of the pelvis. Results Eighteen patients were eligible for the survey. One patient reported a dislocation of the IUD after the MR examination. All other patients had no signs of field interactions. No IUD-related artifacts were found. Conclusion MRI at 3.0-T is possible for women with copper-containing IUDs. However, consulting a gynecologist to check the correct position of the IUD and exclude complications after an MR examination is highly recommended. High-quality clinical imaging of the female pelvis can be performed without a loss in image quality.
Clinical utility of C‐reactive protein in patients with ileal pouch anal anastomosis†

Background: Inflammatory and noninflammatory complications of ileal pouch–anal anastomosis (IPAA) are common after restorative proctocolectomy for ulcerative colitis (UC). The clinical utility of C‐reactive protein (CRP) in ileal pouch disorders has not been investigated. Materials and Methods: All IPAA patients with underlying UC who had serum CRP tested within 2 weeks of pouch endoscopy were included. The correlation between the level of serum CRP and the Pouch Disease Activity Index (PDAI) scores were evaluated. Diagnostic accuracy of CRP in assessing disease activity by PDAI endoscopy subscores was evaluated. Results: There were 83 patients (with a total 88 CRP tests), including normal pouches (n = 7), active pouchitis (n = 6), chronic pouchitis (n = 18), Crohn's disease of the pouch (n = 23), cuffitis (n = 13), irritable pouch syndrome (n = 10), and surgery‐associated complications (n = 11). Levels of CRP did not differ significantly among healthy and diseased pouch groups. CRP levels significantly correlated with the PDAI endoscopy subscores in the pouch body (P = 0.006) and afferent limb (P = 0.03). A CRP level of greater than 0.7 mg/dL for CRP using the receiver operating characteristics curve obtained the best sensitivity of 69.7% and specificity of 63.6% to detect active pouch inflammation. Conclusions: Serum CRP levels correlated with endoscopic inflammation in the pouch and afferent limb. Elevated CRP levels might be useful to monitor the degree of inflammatory activity in pouch noninvasively. However, the CRP level as a snapshot had a limited role in distinction between healthy and diseased pouch conditions diagnosed based on longitudinal clinical and endoscopic evaluation. Inflamm Bowel Dis 2010
DDOS: taming nondeterminism in distributed systems

Nondeterminism complicates the development and management of distributed systems, and arises from two main sources: the local behavior of each individual node as well as the behavior of the network connecting them. Taming nondeterminism effectively requires dealing with both sources. This paper proposes DDOS, a system that leverages prior work on deterministic multithreading to offer: 1) space-efficient record/replay of distributed systems; and 2) fully deterministic distributed behavior. Leveraging deterministic behavior at each node makes outgoing messages strictly a function of explicit inputs. This allows us to record the system by logging just message's arrival time, not the contents. Going further, we propose and implement an algorithm that makes all communication between nodes deterministic by scheduling communication onto a global logical timeline. We implement both algorithms in a system called DDOS and evaluate our system with parallel scientific applications, an HTTP/memcached system and a distributed microbenchmark with a high volume of peer-to-peer communication. Our results show up to two orders of magnitude reduction in log size of record/replay, and that distributed systems can be made deterministic with an order of magnitude of overhead.
A new look at shifting regret

We investigate extensions of well-known online learning algorithms such as fixed-share of Herbster and Warmuth (1998) or the methods proposed by Bousquet and Warmuth (2002). These algorithms use weight sharing schemes to perform as well as the best sequence of experts with a limited number of changes. Here we show, with a common, general, and simpler analysis, that weight sharing in fact achieves much more than what it was designed for. We use it to simultaneously prove new shifting regret bounds for online convex optimization on the simplex in terms of the total variation distance as well as new bounds for the related setting of adaptive regret. Finally, we exhibit the first logarithmic shifting bounds for exp-concave loss functions on the simplex.
The Mayer-Salovey-Caruso emotional intelligence test: Psychometric properties of the Serbian version

The field of emotional intelligence (EI) research has yielded two rather distinct ways of conceptualizing and measuring the construct, which also differ greatly in terms of their scientific value: mixed models of EI, although commercially successful, prove inadequate when subject to scientific scrutiny; by contrast, the Mayer and Salovey ability model of EI meets most of the proposed criteria for establishing a scientifically meaningful EI construct. Its current operationalization, the MSCEIT, has thus far been found to exhibit good reliability, as well as convergent-dicriminant and structural validity. The present study examined the psychometric properties of the Serbian version of the test in a sample of 250 high school graduates. Our results show that the reliabilities of Serbian MSCEIT scores are equivalent to those reported for the American standardization sample; more specifically, reliability coefficients are high for the two Area scores and the Total score (r≥ .86). The Total EI score shows low to moderate correlations with standard measures of academic intelligence (r=.244 - .429; p<.01), and very low correlations with the Big Five personality traits (r<.25) - a pattern that is regarded optimal in establishing convergent-discriminant validity. The factor structure of the Serbian MSCEIT closely corresponds to that of the original test: the theoretically proposed 1-, 2- and 4-factor solutions all prove empirically sustainable; however, in the 2- and 4-factor solutions, the structure of certain EI branches diverges from that which is theoretically expected and incorporated in the scoring system. The obtained data certainly recommend the Serbian MSCEIT for standardization and practical use, in which case they should be supplemented with data regarding the test's predictive validity. On a more basic level, our results suggest the possibility of assessing a scientifically meaningful EI construct, defined as the ability to reason with 'emotional' information.