Miracle-dz/UniFAR-FTUs huggingface dataset:
A Literature Review on Enterprise Social Media Collaboration in Virtual Teams: Challenges, Determinants, Implications and Impacts

This literature review focusses research on Enterprise Social Media (ESM) and its use within virtual teams. The paper includes results from 38 articles outlining the existing body of knowledge and showing the steady progress in this research field. Previous literature often thematizes the external use of social media and technological aspects, but this research concentrates on the internal collaborative use, its challenges, related determinants, managerial implications and its impact on business. Existing research illustrates key factors in each of the previously mentioned subjects. However, as research should consider the entire field, a research agenda for further studies in this ESM topic is developed.
Functional characterization of the progestagen-associated endometrial protein gene in human melanoma

Utilizing gene microarray profiling of melanoma samples, we have recently identified a novel gene overexpressed in both thick primary and metastatic melanomas. This gene, progestagen‐associated endometrial protein (PAEP), has never before been implicated in the oncogenic processes of melanoma, with its true function in oncogenesis and tumour progression relatively unknown. Overexpression of the PAEP gene in freshly procured thick primary and metastatic melanoma samples (58%) and daughter cell lines (77%) is confirmed by quantitative RT‐PCR, immunohistochemistry, Western blotting and mass spectrometric analysis. We suggest that PAEP gene overexpression is involved with melanoma tumour progression as well as an aggressive phenotype. Transfection of melanoma cells with PAEP small interfering RNA (siRNA) reveals a significant decrease in soft agar colony formation and a marked inhibition of both cell migration and cell invasion. Furthermore, we establish stable melanoma transfectants via PAEP lentiviral small hairpin RNA (shRNA), examine their growth characteristics in a murine xenograft model and reveal that tumour growth is significantly inhibited in two separate melanoma cell lines. Our data strongly implicate the PAEP gene as a tumour growth promoter with oncogenic properties and a potential therapeutic target for patients with advanced melanoma.
A Simplified Procedure for the Exposure to the Magnetic Field Produced by Resistance Spot Welding Guns

This paper describes a simplified but effective methodology for the assessment of the human exposure to the magnetic field generated by resistance spot welding guns. The procedure makes it possible to compute the induced electric field in time domain as required by the standardized methodology for the assessment of pulsed magnetic fields (i.e., the weighted peak method). In this paper, we show that the proposed procedure provides results in accordance with a rigorous approach, allowing a huge reduction in the computational burden and, consequently, a significant speedup.
Tape Casting as a Multi Purpose Shaping Technology for Different Applications in Energy Issues

Tape casting is widely used in industrial scale for production of multilayer ceramic capacitors or substrates for different applications. In 2009, it was successfully introduced as standard shaping technology for 3 (BSCF) are shown. The entire scope from the preparation of the used powders, the different manufacturing steps and their optimization potential up to the final tape-cast product will be discussed. The influence of the use of pore forming agents, heat treatment or other parameters during processing will be described in detail. Finally, the option of sequential tape casting of different materials for graded structures as a future step in shaping technology will be presented for different applications.
Exploring the Potential of Combining Time of Flight and Thermal Infrared Cameras for Person Detection

Combining new, low-cost thermal infrared and time-of-flight range sensors provides new opportunities. In this position paper we explore the possibilities of combining these sensors and using their fused data for person detection. The proposed calibration approach for this sensor combination differs from the traditional stereo camera calibration in two fundamental ways. A first distinction is that the spectral sensitivity of the two sensors differs significantly. In fact, there is no sensitivity range overlap at all. A second distinction is that their resolution is typically very low, which requires special attention. We assume a situation in which the sensors’ relative position is known, but their orientation is unknown. In addition, some of the typical measurement errors are discussed, and methods to compensate for them are proposed. We discuss how the fused data could allow increased accuracy and robustness without the need for complex algorithms requiring large amounts of computational power and training data.
Clinical Imaging of the High-Risk or Vulnerable Atherosclerotic Plaque

The study of atherosclerotic disease during its natural history and after therapeutic intervention will enhance our understanding of disease progression and regression and aid in selecting appropriate treatments. Several invasive and noninvasive imaging techniques are available to assess atherosclerotic vessels. Most of the standard techniques identify luminal diameter, stenosis, wall thickness, and plaque volume; however, none can characterize plaque composition and therefore identify the high-risk plaques. We will present the different imaging modalities that have been used for the direct assessment of the carotid, aortic, and coronary atherosclerotic plaques. We will review in detail the use of high-resolution, multicontrast magnetic resonance for the noninvasive imaging of vulnerable plaques and the characterization of plaques in terms of their various components (ie, lipid, fibrous, calcium, or thrombus).
O(log n) dynamic router-tables for prefixes and ranges

Two versions of the Internet (IP) router-table problem are considered. In the first, the router table consists of n pairs of tuples of the form (p, a), where p is an address prefix and a is the next-hop information. In this version of the router-table problem, we are to perform the following operations: insert a new tuple, delete an existing tuple, and find the tuple with longest matching-prefix for a given destination address. We show that each of these three operations may be performed in O(log n) time in the worst case using a priority-search tree. In the second version of the router-table problem considered by us, each tuple in the table has the form (r, a), where r is a range of destination addresses matched by the tuple. The set of tuples in the table is conflict-free. For this version of the router-table problem, we develop a data structure that employs priority-search trees as well as red-black trees. This data structure permits us to perform each of the operations insert, delete, and find the tuple with most-specific matching-range for a given destination address in O(log n) time each in the worst case. The insert and delete operations preserve the conflict-free property of the set of tuples. Experimental results are also presented.
Monthly Activity of Phlebotominae Sand Flies in Sistan-Baluchistan Province, Southeast Iran

Abstract The monthly activity of sand flies, which are vectors of leishmaniasis, was studied from May to October 1997 in three regions (plains, mountainous, coastal) of the Sistan-Bluchistan Province using sticky paper traps. In each village, three houses were selected. 30 sticky traps were installed indoors (bedroom, guestroom, toilet, bathroom) and 30 were installed outdoors (rodent burrows, wall cracks). In total, 8,558 and 1,596 sand fly specimens were collected and identified from outdoors and indoors, respectively. Ten species of Phlebotomus and eight species of Sergentomyia were collected outdoors, and nine species of Phlebotomus and 10 species of Sergentomyia were collected indoors. Phlebotomus papatasi (Scopoli) (Diptera: Psychodidae) was the predominant species found indoors in the plains region (58.4% of insects caught in the region) and was active during the whole study period. The P. papatasi peaks of activity were in early May and early October. Sergentomyia clydei (Sinton) was found to be the most abundant species outdoors in the plains region and comprised 64.7% of the total insects caught in the region. Sergentomyia clydei and S. tiberiadis (Alder, Theodor, and Lourie) were the predominant indoor and outdoor, respectively, species from the mountainous region, making up 19.8% and 35%, respectively, of all the insects caught in the region. Phlebotomus sergenti Parrot is a proven vector of urban cutaneous leishmaniasis, and P. alexandri (Sinton) is a probable vector of Kala-Azar, and both were collected during this study. Phlebotomus papatasi was the most predominant species collected indoors in the coastal region (50.8%), its peak activity was in May. Sergentomyia sintoni Pringle was the most predominant species collected outdoors in the coastal region (36.4%), and its peak activity was in October. Awareness of the peak activity times of sand flies can be useful in developing strategies to control the flies.
AN EFFICIENT LIVER SEGMENTATION USING KERNEL SPARSE CODING AUTOMATED (KSCA) APPROACH

Computed Tomography (CT) images have been widely used for diagnosis of liver disease and volume measurement for liver surgery or transplantation. The approach is presented with respect to liver segmentation, but it can be easily extended to any other soft tissue by setting appropriately the values of the parameters for the splitting and merging algorithm and for the region growing refinement step. Sparse coding with data-adapted dictionaries has been successfully employed in several image recovery and vision problems. A novel, automated segmentation technique for detecting affected region in liver was proposed in this paper. In the new approach, we constructed ensemble kernel matrices using the pixel intensities and their spatial locations, and obtained kernel dictionaries for sparse coding pixels in a non-linear feature space. The resulting sparse codes were used to train an Extreme Learning Machine (ELM) classifier that determines if a pixel in the image belongs to an affected region. From the experimental results using ten test datasets distributed for the competition, it was confirmed that our method kernel sparse coding based liver segmentation performs better than previous methods or models.
A combined diphtheria, tetanus, five-component acellular pertussis, poliovirus and Haemophilus influenzae type b vaccine

Ideally, combination vaccines should not only be safe and effective, but also integrate smoothly into the vaccination schedule and provide advantages over the use of separately administered vaccines. Pentacel™ (Sanofi Pasteur Ltd., Toronto, Canada), a combination vaccine first licensed in Canada and subsequently in other countries, is immunogenic against diphtheria, tetanus, pertussis, polio and Haemophilus influenzae type b when administered at 2, 4, 6 and 15–18 months of age. In published studies, the safety, immunogenicity and effectiveness of this combination vaccine were comparable with those of separately administered vaccines, with the advantage of a simplified dosing schedule.
Wicking properties of various polyamide nanofibrous structures with an optimized method

In comparison with conventional structures, nanofibrous structures have unique characteristics, such as higher surface-to-volume ratios, smaller pores, and higher porosity. Their hydrophilic nature is a key characteristic for many applications. However, because of their high porosity, it is difficult to measure the hydrophilicity of nanofibrous structures with contact-angle measurements. Therefore, characterization through wicking behavior is more appropriate. The International Organization for Standardization norm on wicking needs some refining to account for the specific nature of highly porous nanofibrous structures. A refined method was used on several structures that differed in the fiber diameter and the polyamide type. The structures with the thickest nanofibers had the highest wicking rates. At equilibrium, the wicking heights of structures of different polyamide types with the same average fiber diameter followed the trend expected from their intrinsic hydrophilicity. In the initial phase, the capillary forces established the wicking behavior. Later in the process, the wicking behavior was determined by the capillary forces and the hydrophilicity. In conclusion, the hydrophilicity of nanofibrous structures can be successfully determined by an optimized wicking procedure, and the fiber diameter is the dominant parameter for the resulting wicking height at equilibrium. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Capacity bounds for three classes of wireless networks: asymmetric, cluster, and hybrid

We present capacity results for three classes of wireless ad hoc networks, using a general framework that allows their unified treatment. The results hold with probability going to <i>1</i> as the number of nodes in the network approaches infinity, and under a general model for channel fading.We first study <i>asymmetric networks</i> that consist of <i>n</i> source nodes and around <i>n<sup>d</sup></i> destination nodes, communicating over a wireless channel. Each source node creates data traffic that is directed to a destination node chosen at random. When ½ ‹ <i>d</i> ‹ 1, an aggregate throughput that increases with <i>n</i> as <i>n</i><sup>½</sup> is achievable. If, however, <i>0</i> ‹ <i>d</i> ‹ ½, bottlenecks are formed and the aggregate throughput can not increase faster than <i>n<sup>d</sup></i>. We also consider <i>cluster networks</i>, that consist of <i>n</i> client nodes and around <i>n<sup>d</sup></i> cluster heads, communicating over a wireless channel. Each of the clients wants to communicate with one of the cluster heads, but the particular choice of cluster head is not important. In this setting, the maximum aggregate throughput is on the order of <i>n<sup>d</sup></i>, and it can be achieved with no transmissions taking place between client nodes.We conclude with the study of <i>hybrid networks</i>. These consist of <i>n</i> wireless nodes and around <i>n<sup>d</sup></i> access points. The access points are equipped with wireless transceivers, but are also connected with each other through an independent network of infinite capacity. Their only task is to support the operation of the wireless nodes. When ½ ‹ <i>d</i> ‹ 1, an aggregate throughput on the order of <i>n<sup>d</sup></i> is achievable, through the use of the infrastructure. If, however, <i>0</i> ‹ <i>d</i> ‹ ½, using the infrastructure offers no significant gain, and the wireless nodes can achieve an aggregate throughput on the order of <i>n</i><sup>½</sup> by using the wireless medium only.
OFDM Integer Frequency Offset Estimator in Rapidly Time-Varying Channels

In this paper, we present a simple way of estimating the integer frequency offset of orthogonal frequency division multiplexing (OFDM) system over a rapidly time-varying channel. By utilizing the channel responses of neighboring subcarriers within one pilot symbol, the frequency offset estimator is derived. We show by simulation that the proposed estimator can accurately estimate the integer frequency offset with reduced computational burden
Effect of Adhesive Type and Thickness on the Lap Shear Strength

The effect of the adhesive thickness on the bond strength of single-lap adhesive joints is still not perfectly understood. The classical elastic analyses predict that the strength increases with the adhesive thickness, whereas experimental results show the opposite. Various theories have been proposed to explain this discrepancy, but more experimental tests are necessary to understand all the variables. The objective of the present study was to assess the effect of the adhesive thickness on the strength of single-lap joints for different kinds of adhesives. Three different adhesives were selected and tested in bulk. The strain to failure in tension ranged from 1.3% for the most brittle adhesive to 44% for the most ductile adhesive. The adherend selected was a high-strength steel to keep the adherends in the elastic range and simplify the analysis. Three thicknesses were studied for each adhesive: 0.2, 0.5, and 1 mm. A statistical analysis of the experimental results shows that the lap shear strength increases as the bondline gets thinner and the adhesive gets tougher.
Preparing ACB/UHMWPE Composite by PCS Process and its Electric Resistance-Temperature Behavior

Composite particles with ultra-high molecular polyethylene (UHMWPE) matrix core and acetylene black (ACB) shell were produced by particle composite system (PCS), and molded into conductive polymer composites. Morphology of these composite particles was investigated by SEM. Matrix particles were coated by ACB nanoparticles very well. Conductive networks of ACB in polymer composites were seen by SEM. The results of electrical behavior study show that the polymer composites exhibit low percolation threshold and its electric conductivity is less affected by temperature due to unusual ACB distribution. Related mechanism is discussed.
Developmental programming of aging of isolated pancreatic islet glucose-stimulated insulin secretion in female offspring of mothers fed low-protein diets in pregnancy and/or lactation

Diabetes predisposition is determined by pancreatic islet insulin secretion and insulin resistance. We studied female rat offspring exposed to low-protein maternal diet (50% control protein diet) in pregnancy and/or lactation at postnatal days 36, 110 and 450. Rats were fed either control 20% casein diet (C) or restricted diet (R – 10% casein) during pregnancy. After delivery, mothers received either C or R diet until weaning to provide four offspring groups: CC, RR, CR and RC (first letter denoting maternal pregnancy diet and the second lactation diet). Serum glucose, insulin and homeostatic model assessment (HOMA) were measured. Pancreatic islets were isolated and in vitro insulin secretion quantified in low glucose (5 mM) and high glucose (11 mM). Serum glucose, insulin and HOMA were similar in all groups at 36 and 110 postnatal days. HOMA was only higher in RR at 450 postnatal days. Only CC demonstrated differences in glucose sensitivity of β-cells to high and low doses at the three ages studied. At 36 days, RR, CR and RC and at 450 days RR and RC groups did not show glucose-stimulated insulin secretion differences between low and high glucose. Aging-associated glucose-stimulated insulin secretion loss was affected by maternal dietary history, indicating that developmental programming must be considered a major factor in aging-related development of predisposition to later-life dysfunctional insulin metabolism. Female offspring islets’ insulin secretion was higher than previously reported in males.
Counting Problems and Clones of Functions

Counting solutions of various combinatorial problems is a well established and intensively studied area of theoretical computer science. Its applications range from networking to statistical physics. The central question in this area is the complexity of and algorithms for problems of this type. It turns out that in many important cases these questions can be answered with aid of certain clones of functions of multi-valued logic. We show the connection between the two areas and survey recent advances in this research direction.
Gelfand numbers and metric entropy of convex hulls in Hilbert spaces

AbstractWe establish optimal estimates of Gelfand numbers or Gelfand widths of absolutely convex hulls cov(K) of precompact subsets $${K\subset H}$$ of a Hilbert space H by the metric entropy of the set K where the covering numbers $${N(K, \varepsilon)}$$ of K by $${\varepsilon}$$ -balls of H satisfy the Lorentz condition$$ \int\limits_{0}^{\infty} \left(\log N(K,\varepsilon) \right)^{r/s}\, d\varepsilon^{s} < \infty $$for some fixed $${0 < r, s \le \infty}$$ with the usual modifications in the cases r = ∞, 0 < s < ∞ and 0 < r < ∞, s = ∞. The integral here is an improper Stieltjes integral. Moreover, we obtain optimal estimates of Gelfand numbers of absolutely convex hulls if the metric entropy satisfies the entropy condition $$\sup_{\varepsilon >0 }\varepsilon \left(\log N(K,\varepsilon) \right)^{1/r}\left(\log(2+\log N(K,\varepsilon))\right)^\beta < \infty$$for some fixed 0 < r < ∞, −∞ < β < ∞. Using inequalities between Gelfand and entropy numbers we also get optimal estimates of the metric entropy of the absolutely convex hull cov(K). As an interesting feature of the estimates, a sudden jump of the asymptotic behavior of Gelfand numbers as well as of the metric entropy of absolutely convex hulls occurs for fixed s if the parameter r crosses the point r = 2 and, if r = 2 is fixed, if the parameter β crosses the point β = 1. The results established in Hilbert spaces extend and recover corresponding results of several authors.
Resistance Analyses of Integrase Strand Transfer Inhibitors within Phase 3 Clinical Trials of Treatment-Naive Patients

The integrase (IN) strand transfer inhibitors (INSTIs), raltegravir (RAL), elvitegravir (EVG) and dolutegravir (DTG), comprise the newest drug class approved for the treatment of HIV-1 infection, which joins the existing classes of reverse transcriptase, protease and binding/entry inhibitors. The efficacy of first-line regimens has attained remarkably high levels, reaching undetectable viral loads in 90% of patients by Week 48; however, there remain patients who require a change in regimen due to adverse events, virologic failure with emergent resistance or other issues of patient management. Large, randomized clinical trials conducted in antiretroviral treatment-naive individuals are required for drug approval in this population in the US, EU and other countries, with the primary endpoint for virologic success at Week 48. However, there are differences in the definition of virologic failure and the evaluation of drug resistance among the trials. This review focuses on the methodology and tabulation of resistance to INSTIs in phase 3 clinical trials of first-line regimens and discusses case studies of resistance.
Nonlinear Estimator Design on the Special Orthogonal Group Using Vector Measurements Directly

The convergence properties of popular nonlinear attitude estimators can be traced to the choice of an attitude error function. This paper considers a nonlinear deterministic direction cosine matrix estimator whose form is derived from an alternate attitude error function. While the resulting estimator shares several properties with those previously presented in the literature, the careful selection of an attitude error function results in an estimator with superior convergence properties. The attitude estimate is propagated using a rate gyroscope measurement and corrected using two or more vector measurements. Simulation and experimental results are presented that highlight the desirable properties of the proposed estimator.