gebhart/patrepeval huggingface dataset:
Time Course of Change in Glutathione S-Transferase Positive Foci and Ornithine Decarboxylase Activity after Cessation of Long-term Alcohol Administration in Rats. (2001)

In our previous experiments, we showed that cessation of long-term alcohol administration enhances hepatocarcinogenesis in the rat. In the present study, we examined the time course of hepatocarcinogenesis induced by diethylnitrosamine (DEN) after cessation of alcohol using numbers and areas of glutathione S transferase placental form (GST-P)-positive foci and the activity of ornithine decarboxylase (ODC) in males of the Wistar strain. Fifty six rats were given a single i.p. injection of DEN (200 mg/kg body weight), maintained on basal solid diet for two weeks, then maintained on liquid diet in which 36% of total calories were provided by ethanol (Al diet) for 12 weeks, and then eight rats were killed. The remaining rats were divided into 6 groups. Three alcohol cessation groups were maintained on control liquid diet (C diet) instead of Al diet for 3, 6 and 12 weeks, respectively. The others, as reference groups were maintained on the Al diet continuously for the same periods, respectively. The numbers of GST-P-positive foci per unit area of the liver were not markedly changed after cessation of alcohol. However, their areas were increased with time, so that values in the alcohol cessation groups at 3 and 12 weeks were significantly higher than those in the reference groups at the same points, respectively. Furthermore, ODC activity was significantly elevated in the alcohol cessation groups at 3 and 6 weeks compared to reference groups, but not at 12 weeks when reduction was rather observed. These results suggest that cessation of long-term alcohol administration enhances hepatocarcinogenesis and this effect may be closely related to activation of cell proliferation due to the interruption of alcohol insult.
Extended‐chain crystals. I. General crystallization conditions and review of pressure crystallization of polyethylene (1969)

Abstract This is the first paper of a series of reports concerning extended‐chain crystals of flexible, linear high polymers. The general conditions for crystal growth are discussed. Polymer crystallization is described as a two‐step process: nucleation of each crystallizing molecule to a folded‐chain conformation, followed by an increase in fold length in a solid‐state reorganization step. This reorganization step is enhanced in the case of polyethylene by crystallization at high temperature under elevated pressure. Mechanical deformation during crystallization is also able to produce extended‐chain crystals. The most promising method, however, is crystallization during polymerization. Previous work on crystallization of polyethylene under elevated pressure is critically reviewed.
A new ultra‐wideband antenna for UWB applications (2004)

Abstract In this paper, we propose a new ultra‐wideband (UWB) antenna for UWB applications. The proposed antenna is designed to operate from 3.2 to 12 GHz. It consists of a rectangular patch with two steps, a single slot on the patch, and a partial ground plane. Details of the proposed antenna design and measured results are presented and discussed. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 399–401, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11392
Charge Generation and Mobility-Limited Performance of Bulk Heterojunction Solar Cells with a Higher Adduct Fullerene (2017)

Alternative electron acceptors are being actively explored in order to advance the development of bulk-heterojunction (BHJ) organic solar cells (OSCs). The indene–C60 bisadduct (ICBA) has been regarded as a promising candidate, as it provides high open-circuit voltage in BHJ solar cells; however, the photovoltaic performance of such ICBA-based devices is often inferior when compared to cells with the omnipresent PCBM electron acceptor. Here, by pairing the high performance polymer (FTAZ) as the donor with either PCBM or ICBA as the acceptor, we explore the physical mechanism behind the reduced performance of the ICBA-based device. Time delayed collection field (TDCF) experiments reveal reduced, yet field-independent free charge generation in the FTAZ:ICBA system, explaining the overall lower photocurrent in its cells. Through the analysis of the photoluminescence, photogeneration, and electroluminescence, we find that the lower generation efficiency is neither caused by inefficient exciton splitting, nor do we find evidence for significant energy back-transfer from the CT state to singlet excitons. In fact, the increase in open circuit voltage when replacing PCBM by ICBA is entirely caused by the increase in the CT energy, related to the shift in the LUMO energy, while changes in the radiative and nonradiative recombination losses are nearly absent. On the other hand, space charge limited current (SCLC) and bias-assisted charge extraction (BACE) measurements consistently reveal a severely lower electron mobilitiy in the FTAZ:ICBA blend. Studies of the blends with resonant soft X-ray scattering (R-SoXS), grazing incident wide-angle X-ray scattering (GIWAXS), and scanning transmission X-ray microscopy (STXM) reveal very little differences in the mesoscopic morphology but significantly less nanoscale molecular ordering of the fullerene domains in the ICBA based blends, which we propose as the main cause for the lower generation efficiency and smaller electron mobility. Calculations of the JV curves with an analytical model, using measured values, show good agreement with the experimentally determined JV characteristics, proving that these devices suffer from slow carrier extraction, resulting in significant bimolecular recombination losses. Therefore, this study highlights the importance of high charge carrier mobility for newly synthesized acceptor materials, in addition to having suitable energy levels.
Characterisation of the Interfacial bond Strength between Glass Fibre and Epoxy Resin using the Pull-Out and Push-Out Techniques (2000)

Interfacial bond strength between epoxy resin and glass fibre was studied using the pull-out and push-out techniques. For untreated fibres, these micromechanical tests gave similar values of the local interfacial shear strength and critical energy release rate. In the case of fibres treated by γ-APS, both tests showed considerable increase in the bond strength. However, for the modified fibres, the pull-out test gave greater values of both interfacial parameters than the push-out test, a result attributed to the different modes of interfacial loading. The different loading patterns also cause different failure mechanisms in these two tests.
IN INTERNALLY COOLED GAS TURBINE BLADES (2016)

The Society shall not be responsible for statements or opinions advanced In papers or discussion at meetings of the Society or of its Divisions or Sections, or printed in Its publications. Discussion is primed only it the paper is published In an ASME Journal. Authorization to photocopy for internal or personal use is granted to libraries and other users registered with the Copyright Clearance Center (CCC) provided
Anàlisi i adaptació de la gestió universitària de la Facultat de Nàutica de Barcelona als reptes de futur de l'Espai Europeu d'Ensenyament Superior (2006)

Treball elaborat per a la presentacio al concurs oposicio per a l’acces a
l’escalat tecnica de Gestio. Universitat Politecnica de Catalunya
(Resolucio 2991/2006 de 20 de desembre)
Impact of access contention on cooperative sensing optimisation in cognitive radio networks (2016)

The tradeoff between decreasing interference to primary user (PU) and increasing secondary user's (SU's) throughput is of great importance for cooperative sensing in cognitive radio networks. Non‐ideal spectrum sensing in PHY and multiple SUs' access contention in MAC jointly impact SUs' transmission and the tradeoff. In this study, the authors investigate the joint impact from a cross‐layer perspective. First, they quantify the reliability of cooperative sensing and compute SUs' transmission probability under the conditions of non‐ideal sensing and access contention. Closed‐form expressions of the interference probability to PU and SUs' throughput are derived. Specially, two widely‐used contention‐based MAC protocols, i.e. slotted Aloha and distributed coordination function, are studied. Then, they formulate the sensing‐throughput tradeoff problem by using interference probability to PU, rather than the detection probability, as the constraint. Finally, a 2‐dimension search algorithm is proposed to obtain the optimal solution, including the optimal fusion rule, sensing duration and detection threshold. Simulation results validate the outperformance of the cross‐layer scheme. They also demonstrate how the optimal solution varies with some key parameters, i.e. PU's signal‐to‐noise ratio and the number of contending SUs.
A Study of Ash Accumulation in the After-treatment System of a Gasoline Direct Injection Engine Equipped with a Gasoline Particulate Filter (2017)

&lt;div class="section abstract"&gt;&lt;div class="htmlview paragraph"&gt;In order to meet the EU6c, 6×10&lt;sup&gt;11&lt;/sup&gt; # / km particulate number emission target that will be introduced in 2017, some gasoline direct injection (GDI) engines might require the use of particulate filters (GPF). The lifetime of wall-flow filters is influenced by the composition of the engine lubricant due to the potential of the lubricant to contribute to ash accumulation in the GPF. In order to anticipate the potential need for new, lower ash lubricants, an endurance test was performed using a commercially available GPF. A radio-labelling method was used to identify the amount of lubricant derived ash trapped in the GPF in addition to conventional weighing measurements.&lt;/div&gt;&lt;div class="htmlview paragraph"&gt;After the endurance test, during which 9 kg of 1.17% sulphated ash oil was consumed, approximately 50 g of ash had accumulated in the GPF. This amount is only 48% of the expected amount based on fresh oil sulphated ash concentration and oil consumption. Part of this difference can be explained by the same phenomena that also lead to the observed increase in concentration of lubricant additives in the engine sump (such as but not limited to volatile losses for example). Tracer monitoring of zinc (Zn) and calcium (Ca) via Zn and strontium (Sr) isotopes indicated that the lubricant derived ash contribution was limited to less than 50% of total collected ash, suggesting that other sources such as wear metals and fuel derived ash could also contribute to GPF deposits.&lt;/div&gt;&lt;div class="htmlview paragraph"&gt;Three short tests were also conducted with high, mid and low SAPS (Sulphated Ash, Phosphorus and Sulphur) lubricants in order to evaluate the impact of lubricant formulation on Ca and Zn derived ash accumulation.&lt;/div&gt;&lt;div class="htmlview paragraph"&gt;GPF and engine performance remained satisfactory after 9 kg of a 1.17% sulphated ash lubricant had been consumed suggesting that a mid SAPS lubricant, typically 0.8% sulphated ash, could satisfy the durability requirements of a GPF equipped engine.&lt;/div&gt;&lt;/div&gt;
Evidence for high-risk haplotypes and (CGG)n expansion in fragile X syndrome in the Hellenic population of Greece and Cyprus (1996)

The expansion of the trinucleotide repeat (CGG)n in successive generations through maternal meiosis is the cause of fragile X syndrome. Analysis of CA repeat polymorphisms flanking the FMR-1 gene provides evidence of a limited number of "founder" chromosomes and predisposing high-risk haplotypes related to the mutation. To investigate the origin of mutations in the fragile X syndrome in the Hellenic populations of Greece and Cyprus, we studied the alleles and haplotypes at DXS548 and FRAXAC2 loci of 16 independent fragile X and 70 normal control chromosomes. In addition, we studied 191 unrelated normal X chromosomes for the distribution and frequencies of CGG alleles. At DXS548, 6 alleles were found, 2 (194 and 196) of which were represented on fragile X chromosomes. At FRAXAC2, 6 alleles were found, 4 of which were present on fragile X chromosomes. Sixteen haplotypes were identified, but only 5 were present on fragile X chromosomes. The highest number of CGG repeats (> or = 33) were associated with haplotypes 194-147, 194-151, 194-153, and 204-155. The data provide evidence for founder chromosomes and high-risk haplotypes in the Hellenic population.
Numerical Modeling of Lighting/HVAC Interaction in Enclosures Part I: Light and Heat Transfer in a Room (1998)

A numerical model based on heat transfer equations was developed for the dynamic simulation of a room with lamps in luminaires as the only power source. The model was used to consider heat transfer by conduction, convection and radiation between surfaces in the luminaire, the plenum space and the room space. Also, it was used to calculate temperatures, cooling loads, and lighting levels at each time step. It was designed to be flexible so that different room configurations could be simulated. The main differences between this model and previous models in the literature are that, firstly, this model does not assume that some nodes are massless; secondly, it calculates illuminance on room surfaces; and thirdly, a fluorescent lamp positive column model can be incorporated at a later stage for improved simulation of lighting levels for a room; these differences represent an improvement on similar existing models. The present model was validated, using the experimental results reported by Treado and Bean (1988, 1992), and using further experimental measurements obtained from a laboratory-constructed test cell. Further validation was conducted using the numerical test cell developed by Sowell (1990). Results predicted by the model agreed well with experimental results from both the NIST test cell and the laboratory test cell. The incorporation of a fluorescent lamp positive column model is presented in Part II.
Formation of the Mutagen IFP in Model Systems and Detection in Restaurant Meats (2000)

Mixtures of the free amino acids, creatine and glucose, were dry-heated to model the potential formation of heterocyclic amines in meats. The formation of the mutagenic amine IFP (determined to be 2-amino-(1,6-dimethylfuro[3,2-e]imidazo[4,5-b])pyridine) was investigated by varying heating time, heating temperature, and precursors. With an optimized mixture of glutamine, creatine, and glucose, heated at 200 degrees C for 60 min, 2 mg of IFP was purified for studies to define its structure. Trideuteriomethyl-IFP was made from trideuteriomethylcreatinine in the model system for use in LC-MS detection of IFP in foods. Analysis of well-done meats purchased from restaurants showed about half to contain IFP at levels from 1.4 to 46 ng/g of cooked meat, demonstrating human exposure to this mutagen.
Multidimensional data integration and relationship inference (2002)

The authors present schema for a bioinformatics system accomplishing multidimensional data analysis based on a data warehouse infrastructure. They apply cluster analysis for downstream relationship inference. Their initial application extracts related genes from functional pathways using heterogeneous data from protein-protein interactions and domain analysis.
Resource allocation in OFDMA-based wireless-powered cooperative sensor networks (2015)

We investigate the joint resource allocation problem for both downlink and uplink transmissions in a wireless-powered sensor network. Cooperation among the sensor nodes is considered in the uplink to overcome the performance loss of the sensor nodes that are far from the access point. Since the joint optimization problem of power and subcarrier allocation and relay selection is mixed-integer nonlinear, we develop an efficient algorithm based on dual decomposition technique. Numerical results show the effectiveness of our proposed scheme and performance improvements over the benchmark schemes.
Optimization of the photoacoustic conversion of gold nanorods embedded in biopolymeric scaffolds (2013)

Gold nanorods exhibit intense optical absorbance in the near-infrared region of principal interest for applications in biomedical optics, which evokes their use to improve contrast in photoacoustic imaging and selective photothermolysis of cancer. However their limited photostability remains a drawback of practical concern. In particular, when GNRs are irradiated with nanosecond laser pulses in resonance with their plasmon oscillations, there may occur phenomena like reshaping into spherical particles, as well as fragmentation at higher optical fluences, which result into dramatic modifications of their optical absorption bands and substantial loss of photoacoustic conversion efficiency. In this contribution we present an experimental investigation of stability and photoacoustic conversion efficiency from gold nanorods embedded in biomimetic scaffolds.
Infections of the Eye (1986)

This textbook on the diagnoses and treatment of infections of the eye also covers the organ's pathophysiolgoy, microbiology, parasitology, epidemiology and immunology. Both common and rare infections are covered. This edition contains new and expanded information on opportunistic infections associated with HIV-infected patients. Additional clinical data on various other infections have been added, as well as information on new antimicrobial agents.
Three-Component Reaction of a δ-Hydroxy-α,β-Unsaturated Aldehyde with Arylamines and 1,3-Diketones: A Novel Synthesis of Oxa-Aza Bicycles (2010)

δ-Hydroxy-α,β-unsaturated sugar aldehydes (Perlin aldehydes) undergo smooth coupling with β-enamino ketones and β-enamino esters generated in situ from arylamines and 1,3-dicarbonyl compounds in the presence of 10 mol% InCl3 in acetonitrile at 80 ˚C, to produce oxa-aza-bicycles in good yields with high selectivity.
Using self-organizing maps to learn geometric hash functions for model-based object recognition (1998)

A major problem associated with geometric hashing and methods which have emerged from it is the nonuniform distribution of invariants over the hash space. This has two serious effects on the performance of the method. First, it can result in an inefficient storage of data which can increase recognition time. Second, given that geometric hashing is highly amenable to parallel implementation, a nonuniform distribution of data poses difficulties in tackling the load-balancing problem. Finding a "good" geometric hash function which redistributes the invariants uniformly over the hash space is not easy. Current approaches make assumptions about the statistical characteristics of the data and then use techniques from probability theory to calculate a transformation that maps the nonuniform distribution of invariants to a uniform one. In this paper, a new approach is proposed based on an elastic hash table. In contrast to existing approaches which try to redistribute the invariants over the hash bins, we proceed oppositely by distributing the hash bins over the invariants. The key idea is to associate the hash bins with the output nodes of a self-organizing feature map (SOFM) neural network which is trained using the invariants as training examples. In this way, the location of a hash bin in the space of invariants is determined by the weight vector of the node associated with the hash bin. During training, the SOFM spreads the hash bins proportionally to the distribution of invariants (i.e., more hash bins are assigned to higher density areas while less hash bins are assigned to lower density areas) and adjusts their size so that they eventually hold almost the same number of invariants. The advantage of the proposed approach is that it is a process that adapts to the invariants through learning. Hence, it makes absolutely no assumptions about the statistical characteristics of the invariants and the geometric hash function is actually computed through learning. Furthermore, SOFM's "topology preserving" property ensures that the computed geometric hash function should be well behaved. The proposed approach, was shown to perform well on both artificial and real data.
Graphene Nanoribbons: Geometric, Electronic, and Magnetic Properties (2011)

Graphene nanoribbons (GNRs) have one-dimensional structures with hexagonal twodimensional carbon lattices, which are stripes of graphene. Their structures and their electronic and magnetic properties have been intensively studied both experimentally and theoretically. Due to their various edge structures, GNRs present different electronic properties ranging from normal semiconductors to spin-polarized half metals, which opens the possibility of GNRs as electric devices. In this chapter, the geometric, electronic, and magnetic properties of GNRs are discussed. First, the electronic and magnetic properties of pristine GNRs are understood with their special structures. We emphasize the importance of one-dimensional quantum confinement effect and edge states. Secondly, since GNRs have large surface-volume ratio and special edge states, their properties can be modifie d b y m a n y m e t h ods , s u c h a s dopi n g a n d adsorption. The electronic property and its response to modulation are described in detail. Finally, the experimental realizations of GNRs are introduced, which provide substantial bases to theoretical prediction of GNRs' electronic and magnetic properties. Possible future research directions are also discussed.
A multi-model assessment of C cycling and soil C sequestration in grasslands and croplands (2017)

Agricultural activities can lead to either losses or gains of soil organic carbon (SOC) in croplands and grasslands. Increasing SOC stocks improves soil fertility and is seen as a short to mid-term solution to mitigate greenhouse gas (GHG) emissions. Emerging ecological and societal challenges (climate change, food security, ecosystem sustainability) require improved knowledge of C pools and fluxes, and greater confidence in the biophysical models to assess C balances and implement effective policies in agriculture.
Fast Energy Estimation Through Partial Execution of HPC Applications (2018)

In order to optimize the energy use of servers in Data Centers, techniques such as power capping or power budgeting are usually deployed. These techniques rely on the prediction of the power and execution time of applications. These data are obtained via dynamic profiling which requires a full execution of the application. This is not feasible in High Performance Computing (HPC) applications with long execution times. In this paper, we present a methodology to estimate the dynamic CPU and memory energy consumption of an application without executing it completely. Our methodology merges static code analysis information and dynamic profiling via the partial execution of the application. We do so by leveraging the concept of application signature, defined as a reduced version of the application in terms of execution time and power profile. We validate our methodology with a set of CPU -intensive, memory-intensive benchmarks and multi-threaded applications in a presently shipping enterprise server. Our energy estimation methodology shows an overall error below 8.0% when compared to the dynamic energy of the whole execution of the application. Also, our energy estimation methodology allows to estimate the energy of multi-threaded applications with an RMSE equal to 12.7% when compared to the dynamic energy from the complete parallel execution.