gebhart/patrepeval huggingface dataset:
Distance-Based Opportunistic Mobile Data Offloading (2016)

Cellular network data traffic can be offload onto opportunistic networks. This paper proposes a Distance-based Opportunistic Publish/Subscribe (DOPS) content dissemination model, which is composed of three layers: application layer, decision-making layer and network layer. When a user wants new content, he/she subscribes on a subscribing server. Users having the contents decide whether to deliver the contents to the subscriber based on the distance information. If in the meantime a content owner has traveled further in the immediate past time than the distance between the owner and the subscriber, the content owner will send the content to the subscriber through opportunistic routing. Simulations provide an evaluation of the data traffic offloading efficiency of DOPS.
Parallel Functional Programming with Skeletons: the OCamlP3L experiment (1998)

Writing parallel programs is not easy, and debugging them is usually a nightmare. To cope with these difficulties, a structured approach to parallel programs using skeletons and template based compiler techniques has been developed over the past years by several researchers, including the P3L group in Pisa. This approach is based on the use of a set of primitive forms that are just functionals implemented via templates exploiting the underlying parallelism, so it is natural to ask whether marrying a real functional language like Ocaml with the P3L skeletons can be the basis of a powerful parallel programming environment. We show that this is the case: our prototype, written entirely in Ocaml using a limited form of closure passing, allows a very simple and clean programming style, shows real speed-up over a network of workstations and, as an added fundamental bonus, allows logical debugging of parallel programs in a sequential framework without changing the user code. Key words: skele...
Successful renovascular reconstruction for renal allografts with multiple renal arteries (2003)

Allografts with multiple renal arteries can be used successfully in kidney transplantation.
Performance comparison of multi-user detectors for the downlink of a broadband MC-CDMA system (2006)

In this paper multi-user detection techniques, such as Parallel and Serial Interference Cancellations (PIC &amp; SIC), General Minimum Mean Square Error (GMMSE) and polynomial MMSE, for the downlink of a broadband Multi-Carrier Code Division Multiple Access (MCCDMA) system are investigated. The Bit Error Rate (BER) and Frame Error Rate (FER) results are evaluated, and compared with single-user detection (MMSEC, EGC) approaches, as well. The performance evaluation takes into account the system load, channel coding and modulation schemes.
A No-Reference Deep Learning Quality Assessment Method for Super-resolution Images Based on Frequency Maps (2022)

To support the application scenarios where high-resolution (HR) images are urgently needed, various single image super-resolution (SISR) algorithms are developed. However, SISR is an ill-posed inverse problem, which may bring artifacts like texture shift, blur, etc. to the reconstructed images, thus it is necessary to evaluate the quality of super-resolution images (SRIs). Note that most existing image quality assessment (IQA) methods were developed for synthetically distorted images, which may not work for SRIs since their distortions are more diverse and complicated. Therefore, in this paper, we propose a no-reference deep-learning image quality assessment method based on frequency maps because the artifacts caused by SISR algorithms are quite sensitive to frequency information. Specifically, we first obtain the high-frequency map (HM) and low-frequency map (LM) of SRI by using Sobel operator and piecewise smooth image approximation. Then, a two-stream network is employed to extract the quality-aware features of both frequency maps. Finally, the features are regressed into a single quality value using fully connected layers. The experimental results show that our method outperforms all compared IQA models on the selected three super-resolution quality assessment (SRQA) databases.
Two-dimensional penrose-tiled photonic quasicrystals: Diffraction of light and fractal density of modes (2000)

Abstract We report measurements of the diffraction pattern of a two-dimensional photonic quasicrystal structure. Using a set of plane waves defined by the diffraction pattern we introduce a theoretical approach for the calculation of the band structure which captures the rotational and inflational properties of the quasicrystal. Based on this model we find that the density of modes of the quasicrystal displays a fractal character and a depleted region analogous to the band gap in a periodic system.
Data from Candidate Antimetastasis Drugs Suppress the Metastatic Capacity of Breast Cancer Cells by Reducing Membrane Fluidity (2023)

&lt;div&gt;Abstract&lt;p&gt;Despite the high mortality from metastatic cancer, therapeutic targets to prevent metastasis are limited. Efforts to identify genetic aberrations that predispose tumors to metastasis have been mostly unsuccessful. To understand the nature of candidate targets for metastatic disease, we performed an &lt;i&gt;in silico&lt;/i&gt; screen to identify drugs that can inhibit a gene expression signature associated with epithelial–mesenchymal transition (EMT). Compounds discovered through this method, including those previously identified, appeared to restrict metastatic capacity through a common mechanism, the ability to modulate the fluidity of cell membranes. Treatment of breast cancer cell lines with the putative antimetastasis agents reduced membrane fluidity, resulting in decreased cell motility, stem cell–like properties, and EMT &lt;i&gt;in vitro&lt;/i&gt;, and the drugs also inhibited spontaneous metastasis &lt;i&gt;in vivo&lt;/i&gt;. When fluidity was unchanged, the antimetastasis compounds could no longer restrict metastasis, indicating a causal association between fluidity and metastasis. We further demonstrate that fluidity can be regulated by cellular cholesterol flux, as the cholesterol efflux channel ABCA1 potentiated metastatic behaviors &lt;i&gt;in vitro&lt;/i&gt; and &lt;i&gt;in vivo&lt;/i&gt;. The requirement for fluidity was further supported by the finding in breast cancer patients that &lt;i&gt;ABCA1&lt;/i&gt; was overexpressed in 41% of metastatic tumors, reducing time to metastasis by 9 years. Collectively, our findings reveal increased membrane fluidity as a necessary cellular feature of metastatic potential that can be controlled by many currently available drugs, offering a viable therapeutic opportunity to prevent cancer metastasis. &lt;i&gt;Cancer Res; 76(7); 2037–49. ©2016 AACR&lt;/i&gt;.&lt;/p&gt;&lt;/div&gt;
Quick-fix blowout stoppings for hardrock mines. Technical progress report (1976)

The Bureau of Mines has tested a new concept in stopping design that allows the stopping to be blown down by strong blast forces without incurring any permanent damage. Trials with the new stopping, dubbed the quick-fix blowout stopping, have been conducted in the Bureau's Safety Research Coal Mine at Bruceton, Pa., and in two New Mexico uranium mines. Results have been favorable in all cases. Compared to conventional brattice stoppings or wood bulkheads, the quick-fix blowout stopping is easier and less time consuming to install, easier to maintain, and in most cases is just as efficient an air barrier. There is also some indication that the shape of the stopping makes it more resistant to blast forces than the fabric stoppings now in use.
CRISPR-Cas in Campylobacter jejuni controls membrane integrity and pathogenicity (2015)

The bacterial cell envelope is the most important structure to counteract the early stages of (a)biotic stress. In *Campylobacter jejuni*, a zoonotic human intestinal pathogen, modification of the bacterial cell envelope and Clusters of Regularly Interspaced Short Palindromic Repeats and associated genes (CRISPR-Cas) have both been linked to defense and virulence features. Current evidence suggests that a dual function exists between the CRISPR-Cas system in *C. jejuni* and the regulation of cell envelope exposed outer surface structures. The objective of this study is to elucidate how the CRISPR-Cas system in *C. jejuni* modulates cell envelope exposed outer surface structures during (a)biotic stressors. Here, we show that loss of cell envelope structures or the CRISPR- Cas marker gene cas9 significantly alters membrane permeability, antibiotic resistance, swarming behavior and immune recognition. Bioinformatics and RNA analysis reveal a potential mechanism showing that Cas9 and CRISPR RNAs control the expression of cell envelope structures, as evidenced in other microorganisms. This study indicates that the CRISPR-Cas system in *C. jejuni* is actively involved in the regulation of cell envelope exposed outer surface structures affecting antibiotic resistance, virulence features and immune recognition. *C. jejuni* could utilize its CRISPR-Cas system to regulate its cell envelope structures in order to survive encountered (a)biotic stress in the environment or inside a host during infection. Currently, experiments are ongoing to unravel the exact regulatory mechanism.
Mathematical Modeling of Landfill Gas Extraction (1989)

A model, incorporating Darcy's law, is developed for single‐species gas flow inside a nonisotropic porous medium, within which gas is continuously generated. A linear parabolic equation is derived to express the internal pressure variations in terms of the permeability, gas production rate, and boundary conditions of a site when a series of extraction wells are present. The model is used to determine the gas fluxes within a site of rectangular cross section, into which an arbitrary number of horizontal extraction pipes have been installed. This solution is used to predict the consequences of cumulative failures within a complex pumping system, and hence estimate the circumstances under which gas is first able to escape from a site. Using the results of the model some brief guidelines are offered for designing such installations. The analytical solution technique is contrasted with purely numerical methods for similar problems, and the speed and accuracy of each are compared. An efficient computer implementation for preliminary design studies is suggested.
Pulsed vacuum breakdown measurements with a 1-MV generator (2015)

Measurements of the breakdown field of vacuum gaps have been made with a 1-MV, 50-ns test stand [1]. The first set of experiments was performed with planar, bare metal electrodes [2]. This geometry had an enhanced anode edge that affected measurements. Here, we report on a new set of measurements using anodes without field enhancement. Diagnostics include current and voltage probes, x-ray detector, x-ray pinhole camera and a fast framing camera. The results of these measurements give new insight into the cause of anode interactions that reduce the breakdown field with large gaps.
Effect of perioperative low-dose heparin administration on the course of colon cancer. (1983)

There is evidence that drugs that inhibit blood coagulation or platelet activity may retard or prevent the recurrence of cancer in experimental animals and in patients. The data for 230 patients who underwent surgical resection for primary adenocarcinoma of the colon (Dukes B and C) during 1973 to 1977 were studied retrospectively to determine whether low-dose heparin given for prophylaxis of thromboembolism altered the interval to or prevalence of recurrence. Perioperative low-dose subcutaneous heparin was given to 180 patients, and 50 patients received no heparin. The groups were comparable in age, sex, extent of disease, and use of adjuvant chemotherapy or radiation therapy. Disease recurred in 54 of 180 patients (30%) who received heparin and 18 of 50 patients (36%) who did not receive heparin. This difference was not significant (chi2 = 0.6551, P = 0.418). The interval from surgery to recurrence of cancer was slightly longer in the heparin group (790 days) than in the nonheparin group (638 days), but this difference was not statistically significant (P = 0.268). Life table analysis revealed a significantly lower overall mortality rate among patients who received heparin (P less than 0.05), although there was no difference between the two groups in rate of deaths from colon cancer.
A Novel Self-Calibration Method for Acoustic Vector Sensor (2018)

The acoustic vector sensor (AVS) can measure the acoustic pressure field’s spatial gradient, so it has directionality. But its channels may have nonideal gain/phase responses, which will severely degrade its performance in finding source direction. To solve this problem, in this study, a self-calibration algorithm based on all-phase FFT spectrum analysis is proposed. This method is “self-calibrated” because prior knowledge of the training signal’s arrival angle is not required. By measuring signals from different directions, the initial phase can be achieved by taking the all-phase FFT transform to each channel. We use the amplitude of the main spectrum peak of every channel in different direction to formulate an equation; the amplitude gain estimates can be achieved by solving this equation. In order to get better estimation accuracy, bearing difference of different training signals should be larger than a threshold, which is related to SNR. Finally, the reference signal’s direction of arrival can be estimated. This method is easy to implement and has advantage in accuracy and antinoise. The efficacy of this proposed scheme is verified with simulation results.
A 256 x 256 2-D array transducer with row-column addressing for 3-D rectilinear imaging (2009)

We present simulation and experimental results from a 5-MHz, 256 x 256 2-D (65,536 elements, 38.4 x 38.4 mm) 2-D array transducer with row-column addressing. The main benefits of this design are a reduced number of interconnects, a modified transmit/receive switching scheme with a simple diode circuit, and an ability to perform volumetric imaging of targets near the transducer with transmit beamforming in azimuth and receive beamforming in elevation. The final dimensions of the transducer were 38.4 mm x 38.4 mm x 300 microm. After a row-column transducer was prototyped, the series resonance impedance was 104 Omega at 5.4 MHz. The measured -6 dB fractional bandwidth was 53% with a center frequency of 5.3 MHz. The SNR at the transmit focus was measured to be 30 dB. At 5 MHz, the average nearest neighbor crosstalk was -25 dB. In this paper, we present 3-D images of both 5 pairs of nylon wires embedded in a clear gelatin phantom and an 8 mm diameter cylindrical anechoic cyst phantom acquired from a 256 x 256 2-D array transducer made from a 1-3 composite. We display the azimuth and elevation B-scans as well as the C-scan for each image. The cross-section of the wires is visible in the azimuth B-scan, and the long axes can be seen in the elevation B-scan and C-scans. The pair of wires with 1-mm axial separation is discernible in the elevational B-scan. When a single wire from the wire target phantom was used, the measured lateral beamwidth was 0.68 mm and 0.70 mm at 30 mm depth in transmit beamforming and receive beamforming, respectively, compared with the simulated beamwidth of 0.55 mm. The cross-section of the cyst is visible in the azimuth B-scan whereas the long axes can be seen as a rectangle in the elevation B-scan and C-scans.
Binding of Escherichia coli Hemolysin and Activation of the Target Cells Is Not Receptor-dependent (2005)

Production of a single cysteine substitution mutant, S177C, allowed Escherichia coli hemolysin (HlyA) to be radioactively labeled with tritiated N-ethylmaleimide without affecting biological activity. It thus became possible to study the binding characteristics of HlyA as well as of toxin mutants in which one or both acylation sites were deleted. All toxins bound to erythrocytes and granulocytes in a nonsaturable manner. Only wild-type toxin and the lytic monoacylated mutant stimulated production of superoxide anions in granulocytes. An oxidative burst coincided with elevation of intracellular Ca(2+), which was likely because of passive influx of Ca(2+) through the toxin pores. Competition experiments showed that binding to the cells was receptor-independent, and preloading of cells with a nonlytic HlyA mutant did not abrogate the respiratory burst provoked by a subsequent application of wild-type HlyA. In contrast to a previous report, expression or activation of the beta(2) integrin lymphocyte function-associated antigen-1 did not affect binding of HlyA. We conclude that HlyA binds nonspecifically to target cells and a receptor is involved neither in causing hemolysis nor in triggering cellular reactions.
Investigate and optimize a dual-energy cone beam CT with a CNT x-ray source with dual focal spots (2022)

Cone-beam computed tomography (CBCT) provides volumetric scans while keeping a relatively low dose and cost. This characteristic makes CBCT favorable in the field of dentistry, but the frequent presence of metallic objects in patients causes metal artifact that severely degrades the resulting images. Dual-energy CT provides more information about the materials which can be used to synthesize virtual monoenergetic images (VMI) to reduce metal artifacts. In this work, we investigated and optimized a dual-energy cone-beam CT (DE-CBCT) system using a carbon-nanotube CNT x-ray source with dual focal spots and spectral filtrations. We used two x-ray spectra generated by applying spectral filters at a constant x-ray tube voltage. We imaged an anthropomorphic head phantom with metal beads. The projection images were reconstructed separately using an iterative CT reconstruction algorithm and bilateral filtering is applied to the reconstructed images for denoising. The VMIs were synthesized from the denoised reconstructed images using an image domain decomposition method and displayed noise comparable to the images obtained from a single energy. The resulting VMIs displayed fewer metal artifacts compared to the single energy images of the same object from a clinical CBCT scanner. To optimize the spectral separation, we implemented a filter selection algorithm and improved the mean energy separation from 13keV to 17.5keV while maintaining the same x-ray output. We also demonstrated the ability of this system to independently control the imaging dose of the two energy scans by varying the x-ray exposure current and time using the dual focal spot CNT source.
Optical accelerometer with mechanical amplification via a V-beam mechanism (2013)

A method is reported for improving the performance of a Fabry-Pérot optical accelerometer, based on the use of a V-beam mechanism to amplify the proof mass displacement. Amplification allows the sensitivity to be increased without compromising bandwidth or requiring an increase in cavity finesse. An analytical expression relating the amplification factor to the V-beam length, width and angle was derived and used to produce a series of differently angled devices. A 1.9° device was capable of detecting accelerations from 0.01 to 10 g rms. The 1.33° accelerometer produced an amplification of 18.6 ± 6.4.
MemoSpace (2005)

A central aspect of reducing orientation problems in web navigation concerns the design of adequate navigation aids. Visualization of users' navigation path in form of a temporal-spatial template can function as external memory of users' search history, thereby supporting the user to find previously visited sites, getting an overview of the search process and moreover, provide structure for the complex WorldWideWeb (WWW) environment. This paper presents an application for dynamic 2 and 3 dimensional visualizations of users' navigation paths, called MemoSpace. In an explorative study, users behavior and subjective evaluation of a MemoSpace application was examined.
Distributed dimming control for LED lighting (2013)

This paper presents a distributed energy-saving lighting strategy for the arrangements of a lighting network consisting of a group of light-emitting diode (LED) lamps and users. LED lamps have a dimming support feature to meet the illuminance requirements imposed by individual users. Both groups interact with each other via visible light communication (VLC) or other wireless communication features. This work aims to identify a configuration of lamps leading to the maximal energy saving in adaptive and distributed ways. To this end, a distributed assignment strategy is developed based on a message-passing framework where only local interactions among lamps and users are allowed for calculations and exchanges of the information on their status. The simulation results show that the proposed algorithm outperforms other distributed algorithms in a range of indoor lighting configurations.
Information systems continuance: the role of incentives and goal harmony (2021)

This paper extends information systems continuance theory (ISCT) and integrates it with a managerial perspective. Our study integrates principal-agent theory (PAT) to capture the managerial influence on users' continued use of information technology. We argue that the two theories offer complementary explanations, ameliorate each other's shortcomings, and enhance our ability to explain and predict IS continuance. As predicted by PAT, the study finds support for the effects of goal harmony and incentives on users' continuance decisions. Additionally, goal harmony reduces the positive relationship between incentives and continuance. While the supported ISCT model shows an explained variance of 37%, the full model explains 51% of the variance of the dependent variable, indicating that the integrative model is more powerful in explaining user continuance than is ISCT in isolation. The study advances the theoretical understanding of continued use of IS from both a personal and a managerial perspective and offers proposals for organisational actions.
Distortions and Residual Stresses of Gears Caused by Hardening : 4th Report, Case-Hardening of Gears (1979)

Distortions of case-hardened gears were calculated using the method introduced by the authors, and the results were compared with experimental ones. The results obtained in this paper are summarized as follows. (1) For case-hardening, gear distortions can be calculated tolerably well from the estimation of quenched structure. (2) In this investigation, the quenched structure of SCM21 after case-hardening in the carburizing layer was mostly martensite, and the value of thermal expansion coefficient for each carbon content could be determined by the depth from surface of tooth profile. (3) In this experiment, retained austenite was scarcely observed. But, in the case of much retained austenite, the effect of retained austenite on distortion of gear tooth profile and residual stress should not be ignored.