bluuebunny/crossref_metadata_2025 huggingface dataset:
Price impacts of imperfect collateralization
Authors: Shiraya Kenichiro , Takahashi Akihiko
Published: May 2016

This paper studies impacts of imperfect collateralization on derivatives values. Particularly, we investigate option prices in no collateral posting and time-lagged collateral posting cases with stochastic volatility, interest rate, and default intensity models, where a stochastic collateral asset value may depend on the values of the assets different from the underlying contract. We also derive an approximation of the credit value adjustment (CVA)’s density function in pricing forward contract with bilateral counter party risk, which seems useful in evaluation of the CVA’s Value-at-Risk (VaR).
A Path-Based Distance for Street Map Comparison
Authors: Ahmed Mahmuda , Fasy Brittany Terese , Hickmann Kyle S. , Wenk Carola
Published: May 2016

Comparing two geometric graphs embedded in space is important in the field of transportation network analysis. Given street maps of the same city collected from different sources, researchers often need to know how and where they differ. However, the majority of current graph comparison algorithms are based on structural properties of graphs, such as their degree distribution or their local connectivity properties, and do not consider their spatial embedding. This ignores a key property of road networks since the similarity of travel over two road networks is intimately tied to the specific spatial embedding. Likewise, many current algorithms specific to street map comparison either do not provide quality guarantees or focus on spatial embeddings only.

Motivated by road network comparison, we propose a new path-based distance measure between two planar geometric graphs that is based on comparing sets of travel paths generated over the graphs. Surprisingly, we are able to show that using paths of bounded link-length, we can capture global structural and spatial differences between the graphs.

We show how to utilize our distance measure as a local signature in order to identify and visualize portions of high similarity in the maps. Finally, we present an experimental evaluation of our distance measure and its local signature on street map data from Berlin, Germany and Athens, Greece.
Symbolic Trajectories
Authors: Güting Ralf Hartmut , Valdés Fabio , Damiani Maria Luisa
Published: May 2016

Due to the proliferation of GPS-enabled devices in vehicles or with people, large amounts of position data are recorded every day and the management of such mobility data, also called trajectories, is a very active research field. A lot of effort has gone into discovering “semantics” from the raw geometric trajectories by relating them to the spatial environment or finding patterns, for example, by data mining techniques. A question is how the resulting “meaningful” trajectories can be represented or further queried.

In this article, we propose a systematic study of
annotated trajectory databases
. We define a very simple generic model called
symbolic trajectory
to capture a wide range of meanings derived from a geometric trajectory. Essentially, a symbolic trajectory is just a time-dependent label; variants have sets of labels, places, or sets of places. They are modeled as abstract data types and integrated into a well-established framework of data types and operations for moving objects. Symbolic trajectories can represent, for example, the names of roads traversed obtained by map matching, transportation modes, speed profile, cells of a cellular network, behaviors of animals, cinemas within 2km distance, and so forth. Symbolic trajectories can be combined with geometric trajectories to obtain annotated trajectories.

Besides the model, the main technical contribution of the article is a language for pattern matching and rewriting of symbolic trajectories. A symbolic trajectory can be represented as a sequence of pairs (called units) consisting of a time interval and a label. A pattern consists of unit patterns (specifications for time interval and/or label) and wildcards, matching units and sequences of units, respectively, and regular expressions over such elements. It may further contain variables that can be used in conditions and in rewriting. Conditions and expressions in rewriting may use arbitrary operations available for querying in the host DBMS environment, which makes the language extensible and quite powerful.

We formally define the data model and syntax and semantics of the pattern language. Query operations are offered to integrate pattern matching, rewriting, and classification of symbolic trajectories into a DBMS querying environment. Implementation of the model using finite state machines is described in detail. An experimental evaluation demonstrates the efficiency of the implementation. In particular, it shows dramatic improvements in storage space and response time in a comparison of symbolic and geometric trajectories for some simple queries that can be executed on both symbolic and raw trajectories.
Sojourn Time Approximations for a Discriminatory Processor Sharing Queue
Authors: Izagirre A. , Ayesta U. , Verloop I. M.
Published: May 2016

We study a multiclass time-sharing discipline with relative priorities known as discriminatory processor sharing (DPS), which provides a natural framework to model service differentiation in systems. The analysis of DPS is extremely challenging, and analytical results are scarce. We develop closed-form approximations for the mean conditional (on the service requirement) and unconditional sojourn times. The main benefits of the approximations lie in its simplicity, the fact that it applies for general service requirements with finite second moments, and that it provides insights into the dependency of the performance on the system parameters. We show that the approximation for the mean conditional and unconditional sojourn time of a customer is decreasing as its relative priority increases. We also show that the approximation is exact in various scenarios, and that it is uniformly bounded in the second moments of the service requirements. Finally, we numerically illustrate that the approximation for exponential, hyperexponential, and Pareto service requirements is accurate across a broad range of parameters.
Spatial Consensus Queries in a Collaborative Environment
Authors: Ali Mohammed Eunus , Tanin Egemen , Scheuermann Peter , Nutanong Sarana , Kulik Lars
Published: May 2016

We introduce a new type of query for a location-based social network platform. Consider a scenario in which a group of users is trying to find a common meeting location, yet attempting to include all group members is introducing a significant traveling cost to most of them. In this article, we formulate a new query type called the
consensus query
, which can be used to help users explore these trade-off options to find a solution upon which everyone can agree. Specifically, we study the problem of evaluating consensus queries in the context of nearest neighbor queries, where the group is interested in finding a meeting place that minimizes the travel distance for at least a specified number of group members. To help the group in selecting a suitable solution, the major challenge is to find optimal subgroups of all allowable subgroup sizes, i.e., greater or equal to the minimum specified subgroup size, that minimize the travel distances. We develop incremental algorithms to evaluate in one pass the optimal query subgroups of different sizes along with their corresponding nearest data points. These subsets, which are evaluated by the location-based service provider, constitute the answer set that is returned to the group. The group then collaboratively selects the final answer from the candidate answer set. An extensive experimental study shows the efficiency and effectiveness of our proposed techniques.
Avaliação de protocolos para indução de inatividade ovariana em gatas domésticas
Authors: Ballarotti Débora Tramujas , Moraes Wanderlei De , Oliveira Cláudio Alvarenga de , Felippe Érica C. , Moreira Nei
Published: May 2016

Os índices de prenhez após inseminação artificial em felídeos selvagens não são satisfatórios devido ao variável ambiente endócrino após a estimulação com gonadotropinas. O objetivo deste estudo consistiu em aumentar a taxa de sucesso em programas de inseminação artificial em gatas domésticas (animal modelo). As fêmeas (n=9) foram divididas em três grupos, cada um com três animais, sendo: 1) controle (C), somente 200 UI eCG/ 100 UI hCG ; 2) levonorgestrel oral (L) (0,075 mg) durante 37 dias + eCG/hCG; 3) etonogestrel (E), implante subdérmico durante 37 dias + eCG/hCG. Foram submetidas ao exame laparoscópico 29-39 horas após a administração de hCG para verificação da resposta ovariana e realização de esfregaço vaginal para monitoração da fase do ciclo estral. Foram coletadas amostras de fezes 60 dias antes e 60 dias após o tratamento com gonadotropinas para dosagem hormonal de estrógenos. Os resultados foram avaliados através do Teste ANOVA. Os níveis de significância mostraram que o Grupo E, em contraste com o Grupo C e o Grupo L, apresentou inibição satisfatória das concentrações de estrógenos durante a sua utilização. O grupo L não apresentou inibição ovariana durante o tratamento e diferença significativa em relação ao Grupo C. No exame laparoscópico todas as fêmeas dos grupos C, L e E apresentaram folículos e 77% das fêmeas apresentaram corpo lúteo. Também apresentaram células epiteliais superficiais anucleadas e nucleadas características de estro. Concluiu-se que a utilização de implantes de etonogestrel em gatas domésticas mostrou-se eficaz, possibilitando a sua utilização prévia aos programas de inseminação artificial, aspiração folicular e também para a contracepção.
Seeding an arbitrary convention in capuchin monkeys: the effect of social context
Authors: Lonsdorf E.V. , Bonnie K.E. , Grim M. , Krupnick A. , Prestipino M. , Whyte J.
Published: May 2016

The study of social learning in non-human animals has advanced beyond attempts to determine which animals are capable of learning socially to investigations of the factors that influence transmission. Capuchin monkeys (Sapajus sp.) are adept social learners of various behaviours including extractive foraging techniques and social customs. Here, we conducted an open diffusion experiment to determine whether capuchins would learn an arbitrary convention from a knowledgeable demonstrator. In addition, we investigated whether rank, sex and social context affected acquisition and expression of the behaviour. Participation in the experiment was strongly influenced by dominance rank in the group setting. However, when tested individually, the majority of individuals participated and faithfully copied the convention that was seeded into their group. Our findings demonstrate that capuchins can acquire an arbitrary convention via social learning, but that social context must be carefully considered in studies of social learning.
ECL: an exhaustive search tool for the identification of cross-linked peptides using whole database
Authors: Yu Fengchao , Li Ning , Yu Weichuan
Published: May 2016

Background

Chemical cross-linking combined with mass spectrometry (CX-MS) is a high-throughput approach to studying protein-protein interactions. The number of peptide-peptide combinations grows quadratically with respect to the number of proteins, resulting in a high computational complexity. Widely used methods including xQuest (Rinner et al., Nat Methods 5(4):315–8, 2008; Walzthoeni et al., Nat Methods 9(9):901–3, 2012), pLink (Yang et al., Nat Methods 9(9):904–6, 2012), ProteinProspector (Chu et al., Mol Cell Proteomics 9:25–31, 2010; Trnka et al., 13(2):420–34, 2014) and Kojak (Hoopmann et al., J Proteome Res 14(5):2190–198, 2015) avoid searching all peptide-peptide combinations by pre-selecting peptides with heuristic approaches. However, pre-selection procedures may cause missing findings. The most intuitive approach is searching all possible candidates. A tool that can exhaustively search a whole database without any heuristic pre-selection procedure is therefore desirable.

Results

We have developed a cross-linked peptides identification tool named ECL. It can exhaustively search a whole database in a reasonable period of time without any heuristic pre-selection procedure. Tests showed that searching a database containing 5200 proteins took 7 h.

ECL identified more non-redundant cross-linked peptides than xQuest, pLink, and ProteinProspector. Experiments showed that about 30 % of these additional identified peptides were not pre-selected by Kojak. We used protein crystal structures from the protein data bank to check the intra-protein cross-linked peptides. Most of the distances between cross-linking sites were smaller than 30 Å.

Conclusions

To the best of our knowledge, ECL is the first tool that can exhaustively search all candidates in cross-linked peptides identification. The experiments showed that ECL could identify more peptides than xQuest, pLink, and ProteinProspector. A further analysis indicated that some of the additional identified results were thanks to the exhaustive search.
The analytic wavelet transform with generalized Morse wavelets to detect fluvial channels in the Bohai Bay Basin, China
Authors: Wang Zhiguo , Gao Jinghuai , Wang Ping , Jiang Xiudi
Published: May 2016

The Middle Miocene Minghuazhen Formation of the Bohai Bay Basin is dominated by fluvial channels and shallow-lacustrine deltaic systems. These depositional facies, along with complex postdepositional faulting, make it difficult to detect fluvial channels. As a useful seismic attribute to solve this problem in the Bohai Bay Basin, spectral decomposition of 3D seismic data can provide significant information to understand the subsurface fluvial channels. The analytic wavelet transform (AWT) is a promising approach for implementing spectral decomposition to provide a detailed time-frequency representation. In particular, by varying two parameters (beta and gamma) controlling the wavelet forms, the generalized Morse wavelets (GMWs) can be given a broad range of characteristics while remaining exactly analytic. To detect fluvial channels with thickness around and lower than the tuning thickness, we have proposed a suitable (beta = 1 and gamma = 3) pair of parameters for GMWs because such an exactly analytic Morse wavelet substantially outperforms the approximately analytic Morlet wavelet for high time localization. We have applied the AWT with a GMW (beta = 1 and gamma = 3) to 3D seismic data in the Lower Minghuazhen Formation, Bohai Bay Basin, China. The stratal slicing of spectral decomposition volumes at depositional cycle 2 of the Lower Minghuazhen Formation shows its potential for channel interpretation and the optimization of well patterns.
Model-based subtraction of spikes from surface nuclear magnetic resonance data
Authors: Larsen Jakob Juul
Published: May 2016

Surface nuclear magnetic resonance (surface NMR) has progressed significantly in recent years due to advances in instrumentation. In particular, the introduction of multichannel surface NMR instruments has been effective in improving the signal-to-noise ratio. The current methodology for noise reduction with multichannel instruments is, however, inadequate in complex noise environments, and there is a need for improved signal processing. We have evaluated a study of impulsive noise (spikes) in surface NMR data acquired with a Numis Poly instrument. We have determined how the spectral content can be used to classify spikes as originating from electric fences or sferics. Measurements of spikes from two electric fences were evaluated. The spikes were highly deterministic and can be modeled as impulsive excitations of the band-pass filter in the surface NMR receiver system. We investigated the feasibility of a model-based approach for subtraction of electric fence spikes. Model-based subtraction was shown to be possible, but it is limited by accidental fitting of the NMR signal in its current embodiment. We evaluated an example of a surface NMR data set in which subtraction of powerline harmonic noise and electric fence spike noise removed all coherence in the multichannel data, and the consequences for further noise reduction using multichannel methods were developed.
Interpretation of magnetic resonance measurements in the varying earth’s magnetic field
Authors: Legchenko Anatoly , Vouillamoz Jean-Michel , Lawson Fabrice Messan Amene , Alle Christian , Descloitres Marc , Boucher Marie
Published: May 2016

At the scale of a magnetic resonance sounding (MRS) field setup, the earth’s magnetic field in the subsurface may vary laterally with depth and over time. These variations can be caused by different natural factors and generally cannot be compensated for by accurate tuning of the measuring device. The varying geomagnetic field (GMF) causes nonresonance conditions of excitation that affect the amplitude and phase of the MRS signal. Usually, variations of the GMF do not exceed a few hertz and their effect on the amplitude is relatively small, permitting us to assume near-resonance conditions for inversion. However, in some cases, the results may be erroneous if a varying GMF is not taken into account. Motivated by possible improvements in MRS inversion, we have developed a procedure for measuring and interpreting MRS data that considers a varying GMF. Our results showed that it is relatively easy to take a time-varying GMF into account. As a demonstration, we have developed the inversion of MRS data measured in Benin (West Africa). A depth-varying GMF is a more complex problem, and to consider this, we have developed an algorithm of nonlinear inversion. We have tested this approach on synthetic data, which resulted in an improved inversion. Field validation of this procedure awaits the discovery of a suitable test site with known variations of the earth’s magnetic field in the subsurface.
Zeta potential in porous rocks in contact with monovalent and divalent electrolyte aqueous solutions
Authors: Thanh Luong Duy , Sprik Rudolf
Published: May 2016

Electrokinetic phenomena are the result of a coupling between a fluid flow and an electric current flow in porous rocks. The zeta potential is an important parameter that influences the electrokinetic coupling. Most reservoir rocks are saturated or partially saturated by natural water containing various types of ions. Therefore, it is important to understand how the zeta potential and therefore the electric double layer (EDL) behave for different types of ions or electrolytes. Types of electrolytes influence the zeta potential most by affecting the surface charge — by changing the thickness of the EDL and the exact location of the shear plane. To study the dependence of the zeta potential on various electrolytes, we have carried out streaming potential measurements for consolidated rock samples saturated by monovalent and divalent electrolytes. From streaming potential coefficients, the zeta potential is obtained for different systems of electrolytes and rocks. The experimental results of silica-based rocks are then compared with theoretical models. For 1:1 or 1:2 electrolytes, a theoretical model for the zeta potential that has been available in literature is used. For 2:2 or 2:1 electrolytes, we have developed a new model to calculate the Stern potential and the zeta potential. The comparison found that the theoretical models can explain the main behavior of the zeta potential against types of electrolytes and types of silica-based rocks. The results show that the zeta potential for monovalent electrolytes is higher than that for divalent electrolytes. The zeta potential of the silica-based samples is higher than that of the nonsilica-based samples when they are saturated by the same types of electrolyte.
Geophysical signature of the Victoria property, vectoring toward deep mineralization in the Sudbury Basin
Authors: Spicer Bill
Published: May 2016

Exploration throughout KGHM International’s Victoria property in Sudbury, Ontario, occurred over an approximate 10-year period and resulted in the discovery of the Victoria Deposit. A variety of geophysical techniques were used with varying results to detect Cu-Ni-PGE-rich ore bodies at depth. Near-surface methods supplemented traditional mapping and geologic interpretation techniques to gain an understanding of property-scale depositional environments. The use of 3C borehole EM surveying facilitated the transition from a broad exploration program, which was based on surface geophysical signatures and geologic principles toward a targeted mineral definition campaign. The presence of off-hole features within several drillholes targeting a lesser massive sulfide lens identified a mass of strong conductors approximately 1 km deep. The drilling of thin-plate forward models derived from the borehole EMs resulted in the intersection of the Victoria Deposit. The tabular deposit has a downdip extent of more than 1500 m and remains open at depth. This significant discovery is an example of the opportunity that remains at depth within the Sudbury Basin, one of the world’s most prolific mining camps.
Origin and distribution of abnormally high pressure in the Mahanadi Basin, east coast of India
Authors: Kumar Ashutosh , Gunasekaran Karthikeyan , Bhardwaj Nitin , Dutta Jayanta , Banerjee Smita
Published: May 2016

Drilling deep wells in the Mahanadi Basin of the east coast of India is highly challenging because of the variations in pore pressure in the Miocene formations. We have observed that the wells drilled in the northern part of the study area have more drilling hazards due to the presence of high pore pressure (modular dynamic test measurements of up to 18.5 ppg) when compared with wells drilled in the southern part of the basin. In the northern part, pore pressure prediction assuming disequilibrium compaction (DC) underpredicts by approximately 2–3.5 ppg when compared with observed pressures; however, in the southern part, pressure prediction matches the observed pressures in the drilled wells. Analysis of sonic velocity-density crossplots suggests that along with DC, some other secondary mechanism also plays an important role in generating excess overpressure in the northern part of the study area; however, the well data do not indicate the presence of an established secondary mechanism, such as fluid expansion, clay conversion, or cementation. The prime difference between the northern and southern areas is the presence of multiple canyon cuts in the northern part and the observation that very high overpressures occur below these canyon cuts. Hence, an attempt was made to ascertain the relationship between the presence of canyon cuts and the observed high pressure with the help of burial history modeling that incorporates the canyon cut features. Pressure estimation based on this approach closely matches the observed pressures in the drilled wells. This very high overpressure observed in the northern part is most likely generated by the combined effect of porosity rebound (due to overburden removal) along with persistence of overpressures that developed prior to erosion. This burial history modeling approach helps in recognizing and understanding the impact of erosional canyon cut events on generation of excess overpressure in the study area. Furthermore, effective stress methods that take secondary pressure generating mechanisms (unloading) into account are used to quantify the difference in pore pressure.
Melting ice, growing trade?
Authors: Bensassi Sami , Stroeve Julienne C. , Martínez-Zarzoso Inmaculada , Barrett Andrew P.
Published: May 2016

Large reductions in Arctic sea ice, most notably in summer, coupled with growing interest in Arctic shipping and resource exploitation have renewed interest in the economic potential of the Northern Sea Route (NSR). Two key constraints on the future viability of the NSR pertain to bathymetry and the future evolution of the sea ice cover. Climate model projections of future sea ice conditions throughout the rest of the century suggest that even under the most “aggressive” emission scenario, increases in international trade between Europe and Asia will be very low. The large inter-annual variability of weather and sea ice conditions in the route, the Russian toll imposed for transiting the NSR, together with high insurance costs and scarce loading/unloading opportunities, limit the use of the NSR. We show that even if these obstacles are removed, the duration of the opening of the NSR over the course of the century is not long enough to offer a consequent boost to international trade at the macroeconomic level.
A mixed-paradigm component architecture for implementing
web-based game servers
Authors: Friese Stefan , Rother Kristian
Published: May 2016

Games are a well-suited testbed for the development
and evaluation of concepts and tools in artificial intelligence
(AI). In our paper we outline the architecture of
a web-based game server that was developed to support
the teaching of artificial intelligence at the university level
as well as research in the domain of AI and rule-based language
development. The server combines a Prolog-based
declarative approach with Java-based server technologies.
The architecture consists of multiple, strictly separated
components. Declarative components comprise the gameindependent
core engine as well as game-dependent logic
and visualization descriptions. General operations (e.g.
user management, load balancing, match maintenance
etc.) and rendering of the visualization descriptions with
actual GUI techniques are implemented imperatively. External
interfaces are provided to integrate remote developers
and learners to facilitate usage beyond the borders of a
single university.
Implementation of algebraic procedures on the
GPU using CUDA architecture on the example of
generalized eigenvalue problem
Authors: Syrocki Łukasz , Pestka Grzegorz
Published: May 2016

The ready to use set of functions to facilitate
solving a generalized eigenvalue problem for symmetric
matrices in order to efficiently calculate eigenvalues and
eigenvectors, using Compute Unified Device Architecture
(CUDA) technology from NVIDIA, is provided. An integral
part of the CUDA is the high level programming environment
enabling tracking both code executed on Central Processing
Unit and on Graphics Processing Unit. The presented
matrix structures allow for the analysis of the advantages
of using graphics processors in such calculations.
Design of on-line system for measuring and
tracking time of assembly
Authors: Senderská Katarína , Mareš Albert , Evin Emil
Published: May 2016

Manual assembly performed at assembly workstations
nowadays still has a unique place in different
kinds of production. To increase the productivity and quality
of manual assembly it is necessary to analyse the existing
workplaces and find ways to improve and streamline
work done at these workplaces. The article deals with
the design of a model for on-line analysis of a manual assembly
process. The proposed model is based on the use of
sensors or the so-called button-box and the use of software
for recording and evaluating data. Based on the obtained
data it is then possible to evaluate the time characteristics
of the assembly process, aswell as to find sources of delays
and mistakes and then take appropriate action to correct
them.
Cross-dating tree-ring series of living European beech by isochronic weather records
Authors: Sedmáková Denisa , Sedmák Róbert , Bosel’a Michal , Ježík Marek , Sitko Roman , Hlásny Tomáš , Blaženec Miroslav
Published: May 2016

The main objective of the study is to facilitate cross-dating of sensitive tree-ring series from living European beech (Fagus sylvatica L.) trees in the absence of a regional chronology. The main idea lies in the preliminary dating of marker rings or ring patterns visually identified on the wood (before the ring-width measurements), which is independently validated through a moving correlation between a tentative reference chronology and instrumental climate records (after the ring-width measurements). Following the detection of low moving correlations, potentially misdated segments or series are re-examined and a new tentative reference chronology is constructed. The process is repeated as long as a higher correlation with climate is obtainable. The applicability of this method was investigated on three difficult-to-date sets of tree-ring series of beech trees which were growing at temperature- or precipitation-sensitive locations in under-canopy or canopy positions. A good ability of the combined method for the cross-dating was practiced on datasets almost impossible to cross-date by commonly used approaches. Highlighting the actual correlation of ring widths with climate in tree-ring series makes the cross-dating process more independent from human decisions, so the com-bined cross-dating has the potential to improve the reliability of various dendrochronological studies.
Design of Passive Power Filter for Hybrid Series Active Power Filter using Estimation, Detection and Classification Method
Authors: Swain Sushree Diptimayee , Ray Pravat Kumar , Mohanty K.B.
Published: May 2016

This research paper discover the design of a shunt Passive Power Filter (PPF) in Hybrid Series Active Power Filter (HSAPF) that employs a novel analytic methodology which is superior than FFT analysis. This novel approach consists of the estimation, detection and classification of the signals. The proposed method is applied to estimate, detect and classify the power quality (PQ) disturbance such as harmonics. This proposed work deals with three methods: the harmonic detection through wavelet transform method, the harmonic estimation by Kalman Filter algorithm and harmonic classification by decision tree method. From different type of mother wavelets in wavelet transform method, the db8 is selected as suitable mother wavelet because of its potency on transient response and crouched oscillation at frequency domain. In harmonic compensation process, the detected harmonic is compensated through Hybrid Series Active Power Filter (HSAPF) based on Instantaneous Reactive Power Theory (IRPT). The efficacy of the proposed method is verified in MATLAB/SIMULINK domain and as well as with an experimental set up. The obtained results confirm the superiority of the proposed methodology than FFT analysis. This newly proposed PPF is used to make the conventional HSAPF more robust and stable.
Duality-based adaptivity in finite element discretization of heterogeneous multiscale problems
Authors: Maier Matthias , Rannacher Rolf
Published: May 2016

This paper introduces an framework for adaptivity for a class of heterogeneous multiscale finite element methods for elliptic problems, which is suitable for
A direct algorithm in some free boundary problems
Authors: Murea Cornel M. , Tiba Dan
Published: May 2016

In this paper we propose a new algorithm for the well known elliptic obstacle problem and for parabolic variational inequalities like one- and two- phase Stefan problem and of obstacle type. Our approach enters the category of fixed domain methods and solves just linear elliptic or parabolic equations and their discretization at each iteration. We prove stability and convergence properties. The approximating coincidence set is explicitly computed and it converges in the Hausdorff-Pompeiu sense to the searched geometry. In the numerical examples, the algorithm has a very fast convergence and the obtained solutions (including the free boundaries) are accurate.
Parabolic sublinear operators with rough kernel generated by parabolic calderön-zygmund operators and parabolic local campanato space estimates for their commutators on the parabolic generalized local morrey spaces
Authors: Gurbuz Ferit
Published: May 2016

In this paper, the author introduces parabolic generalized local Morrey spaces and gets the boundedness of a large class of parabolic rough operators on them. The author also establishes the parabolic local Campanato space estimates for their commutators on parabolic generalized local Morrey spaces. As its special cases, the corresponding results of parabolic sublinear operators with rough kernel and their commutators can be deduced, respectively. At last, parabolic Marcinkiewicz operator which satisfies the conditions of these theorems can be considered as an example.
A polysemy account of alternating verbs of creation in Brazilian Portuguese
Authors: Amaral Luana
Published: May 2016

Verbs of creation such aswriteandpaint, in English and in other languages, occur in two distinct types of sentences: transitive or intransitive (The teacher wrote the letter/The teacher wrote (a lot)andThe artist painted a picture/The artist painted (a lot)). In this paper, we provide an analysis of such syntactic alternation, drawing on data from Brazilian Portuguese. We argue that this syntactic phenomenon is triggered by a semantic process of polysemy, and not by an argument alternation, as is assumed by some authors. We show evidence to support our proposal, namely, the distinct aspectual interpretations of the different sentences with verbs of creation, the distinct prefixation withre- in the transitive and intransitive forms, and the polysemy found in the nominalizations of the analyzed verbs. In order to formalize our semantic account, we propose a type of representation, a predicate decomposition structure enriched by a simple truth-conditional semantics of the root.
A phase-theoretic approach to cliticization in Romance
Authors: Gallego Ángel J.
Published: May 2016

This paper puts forward an analysis of cliticization within the framework of phases (cf. Chomsky 2000et seq.). In particular, it is argued that object clitics in Romance A-move as XPs to the v*P phase edge, adhering to standard locality constraints (the Phase Impenetrability Condition). The proposal is explored in the context of clitic climbing (and “restructuring”), which is related here to the existence of defective domains where the relevant Probe (v*) fails to assign Case to the Goal (the clitic). Finally, the possibility that semantic effects are associated to climbing (cf. Uriagereka 2002) is also considered, in line with the interpretation triggered by displacement processes of the object shift sort (cf. Chomsky 2001).
Preparation and conformation of 3,4-anhydro-1,2-O-isopropylidene-5-O-mesyl-β-d-tagatopyranose and methyl 4-chloro-4-deoxy-1,3,5-tri-O-mesyl-β-d-fructopyranoside
Authors: Voss Jürgen , Polchow-Stein Kerstin , Adiwidjaja Gunadi
Published: May 2016

The treatment of 3-O-acetyl-1,2-O-isopropylidene-4,5-di-O-methanesulfonyl-β-d-fructopyranose with sodium methoxide led to the crystalline epoxy-sugar 3,4-anhydro-1,2-O-isopropylidene-5-O-methanesulfonyl-β-d-tagatopyranose, the structure of which was determined by X-ray diffraction. Solvolysis of the epoxide with methanolic hydrogen chloride and subsequent mesylation gave methyl 4-chloro-4-deoxy-1,3,5-tri-O-methanesulfonyl-β-d-fructopyranoside which was also characterized by X-ray structure determination.
Gold nanocrystal arrays as electrocatalysts for the oxidation of methanol and ethanol
Authors: Davi Martin , Schultze Tim , Kleinschmidt Denise , Schiefer Frank , Hahn Birgit , Slabon Adam
Published: May 2016

A general difficulty in the comparison of catalysts regarding their electrochemical activities is the significant dependency on the electrode preparation method. In addition to single-crystal, thin-film, and polycrystalline electrodes, most electrocatalysts contain a physical mixture of catalytically active nanocrystals (NCs), conductive carbon support, and binding agent. This type of preparation makes the agglomeration of NCs to larger entities inevitable and simultaneously decreases the catalytically active surface area. In this work, electocatalysts based on two-dimensional arrays of self-assembled monodisperse Au NCs with a particle size of 8 nm have been fabricated. Their electrocatalytic performance in the electrochemical oxidation reaction of methanol and ethanol was investigated for different pH values. The self-assembly of Au NCs into two-dimensional arrays enables to fabricate electrocatalysts with a high mass activity in alkaline electrolytes for alcohol oxidation reactions.
Cardiac Implantable Electronic Device Infection in Patients at Risk
Authors: Tarakji Khaldoun G ,   Heart and Vascular Institute, Cleveland Clinic, Ohio, US, Ellis Christopher R ,   Vanderbilt Heart and Vascular Institute at Vanderbilt University, Nashville, Tennessee, US, Defaye Pascal ,   Centre Hospitalier Universitaire de Grenoble, La Tronche, France, Kennergren Charles ,   Sahlgrenska University Hospital, Gothenburg, Sweden
Published: May 2016

The incidence of infection following implantation of cardiac implantable electronic devices (CIEDs) is increasing at a faster rate than that of device implantation. Patients with a CIED infection usually require hospitalisation and complete device and lead removal. A significant proportion die from their infection. Transvenous lead extraction (TLE) is associated with rare but serious complications including major vascular injury or cardiac perforation. Operator experience and advances in lead extraction methods, including laser technology and rotational sheaths, have resulted in procedures having a low risk of complication and mortality. Strategies for preventing CIED infections include intravenous antibiotics and aseptic surgical techniques. An additional method to reduce CIED infection may be the use of antibacterial TYRX™ envelope. Data from non-randomised cohort studies have indicated that antibacterial envelope use can reduce the incidence of CIED infection by more than 80 % in high-risk patients and a randomised clinical trial is ongoing.
Dual Antiplatelet Therapy After Drug-eluting Stent Implantation
Authors: Magnani Giulia ,   Bern University Hospital, Inselspital, Bern, Switzerland,   Bern University Hospital, Inselspital, Bern, Switzerland, Valgimigli Marco
Published: May 2016

The current guidelines for percutaneous coronary intervention use recommend dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 inhibitor after drug eluting stent (DES) implantation. The optimal duration of DAPT is however area of debate. Recent clinical trials and meta-analyses suggest that the choice of DAPT duration should be tailored individually, based on the balance between ischemic and bleeding risk carried by the patient.
Primary Angioplasty For Patients in Cardiogenic Shock: Optimal Management
Authors: Joseph Jubin ,   King’s College London British Heart Foundation Centre of Excellence, The Rayne Institute, St. Thomas’ Hospital Campus, London, UK,   King’s College London British Heart Foundation Centre of Excellence, The Rayne Institute, St. Thomas’ Hospital Campus, London, UK,   King’s College London British Heart Foundation Centre of Excellence, The Rayne Institute, St. Thomas’ Hospital Campus, London, UK,   King’s College London British Heart Foundation Centre of Excellence, The Rayne Institute, St. Thomas’ Hospital Campus, London, UK,   King’s College London British Heart Foundation Centre of Excellence, The Rayne Institute, St. Thomas’ Hospital Campus, London, UK, Patterson Tiffany , Arri Satpal , McConkey Hannah , Redwood Simon R
Published: May 2016

Cardiogenic shock complicates approximately 5–10 % of all MI events and remains the most common cause of death among MI cases. Over the past few decades, the mortality rate associated with cardiogenic shock has decreased with the introduction of early revascularisation, although there are limited data for patients with triple-vessel disease and left main stem disease. In more recent years, there have been a number of advances in the mechanical circulatory support devices that can help improve the haemodynamics of patients in cardiogenic shock. Despite these advances, together with progress in the use of inotropes and vasopressors, cardiogenic shock remains associated with high morbidity and mortality rates. This review will outline the management of cardiogenic shock complicating acute MI with a smajor focus on revascularisation techniques and the use of mechanical circulatory support devices.
The Use of the Cre8 Stent in Patients with Diabetes Mellitus
Authors: Carrié Didier ,   Department of Cardiology, University Hospital Rangueil, Toulouse, France
Published: May 2016

Despite improved clinical outcomes following the availability of second-generation drug eluting stents (DES), percutaneous coronary intervention (PCI) is associated with worse clinical and angiographic outcomes among patients with diabetes mellitus (DM) than among non-diabetics. The Cre8™ Amphilimus-eluting DES is polymer-free, resulting in a reduced inflammatory response and lower risk of stent thrombosis. It showed equivalent efficacy and safety in diabetic and non-diabetic populations, a unique finding among DES studies. These findings were confirmed in a real-world study called INVESTIG8. Another real-world study, pARTicip8, is ongoing. The RESERVOIR clinical trial recruited patients with diabetes mellitus and showed noninferiority of the Cre8 DES compared to an everolimus-eluting DES but showed a statistical superiority of Cre8 in diabetic patients with higher metabolic dysfunctions. The Cre8 DES is therefore a valuable option for this important patient population.
Impact of Mitral Regurgitation on Clinical Outcomes After Transcatheter Aortic Valve Implantation
Authors: O’Sullivan Crochan J ,   Department of Cardiology, Triemli Hospital, Zurich, Switzerland,   Department of Cardiology, Triemli Hospital, Zurich, Switzerland,   Department of Cardiology, Triemli Hospital, Zurich, Switzerland,   Department of Cardiology, Triemli Hospital, Zurich, Switzerland, Tüller David , Zbinden Rainer , Eberli Franz R
Published: May 2016

Severe aortic stenosis (AS) and mitral regurgitation (MR) are the two most common valvular lesions referred for surgical intervention in Europe and frequently co-exist. In patients with both severe AS and significant MR referred for surgical aortic valve replacement (SAVR), a concomitant mitral valve intervention is typically performed if the MR is severe, despite the higher associated perioperative risk. The management of moderate MR among SAVR patients is controversial and depends on a number of factors including MR aetiology (i.e., organic versus functional MR), feasibility of repair and patient risk profile. Moderate or severe MR is present in up to one-third of patients undergoing transcatheter aortic valve implantation (TAVI), is mainly of functional aetiology and is typically left untreated. Although data are conflicting, a growing body of evidence suggests that significant MR exerts an adverse effect on both short- and long-term clinical outcomes after TAVI. Moderate or severe MR improves in just over half of patients following TAVI and recent data suggest MR is more likely to improve among patients receiving a balloon-expandable as compared with a self-expandable transcatheter heart valve.
Determining the Most Appropriate Mode of Coronary Artery Revascularisation in Patients With Diabetes
Authors: Armstrong Ehrin J ,   Veterans Affairs Eastern Colorado Healthcare System, University of Colorado, Denver, CO, USA
Published: May 2016

Obstructive coronary artery disease is a common cause of morbidity and mortality among patients with diabetes mellitus (DM). Previous research has demonstrated that the clinical sequelae of coronary artery disease remains the most common cause of death in this population. As a result numerous observational studies and randomised clinical trials have evaluated the timing and mode of coronary artery revascularisation within this population. In this review, we survey the currently available data informing the indications and optimal method of coronary revascularisation for diabetic patients.
Os Aminoácidos nos Livros Didáticos de Biologia do Ensino Médio e de Bioquímica do Ensino Superior
Authors: De Oliveira Patrícia Santos , Lacerda Caroline Dutra , Bianconi Maria Lucia
Published: May 2016

O tema “aminoácidos” foi analisado em onze livros didáticos de Biologia do ensino médio aprovados no Plano Nacional do Livro Didático de 2012 e de 2015 e em seis livros textos de Bioquímica utilizados no nível superior. O tema foi escolhido por permitir a exemplificação do conceito de pKa e sistema tampão, importante no estudo de estrutura e função de proteínas e enzimas, apesar de considerado árido pelos alunos de graduação da área da Saúde. Em todos os livros de ensino médio foi identificado ao menos um problema que leva à formação de concepções alternativas. Ao contrário, nos livros de ensino superior, o assunto é abordado de forma clara apesar de terem sido identificados alguns vícios de linguagem na descrição da estrutura dos aminoácidos. Ao final, apresentamos uma sugestão de abordagem colaborativa que tem sido bastante eficaz no ensino desse e de assuntos correlatos.
Vatican II and the Changing Face of Moral Discourse in Africa
Authors: Amole Victor Abimbola
Published: May 2016

This essay argues that the Second Vatican Council, with its characteristic aggiornamento, and the two Special Assemblies for Africa of the Synod of Bishops, have from their incipience indicated the change that would be witnessed within the structures of theological and moral discourses of the future.In a specific manner, the paper aims to show how the contemporary construction of morality online, globally but particularly in Africa, could almost be seen as a prophetic insight already indicated by the vision of the Second Vatican Council and its two Special Assemblies for Africa.
Notes from the Road More Traveled: Doing Theology in a US Cultural Context
Authors: Markey, OP John J.
Published: May 2016

One of the most significant consequences of Vatican II has been the worldwide effort at inculturation and contextualization of the Christian tradition, particularly at the level of foundational theology and method.This process implies drawing on the unique patterns of thought, social structures, cultural narratives, and rituals to develop new theological and pastoral sensibilities.This process, termed “prophetic dialogue” by Steve Bevans and Roger Schroeder,[1] seems to be dramatically underway practically everywhere in the Roman Catholic world except, most notably, in the United States.While Hispanics/Latin@s, African Americans, Asian Americans, feminists, etc., have continuously served with an awareness of the need for contextualization, Euro-American academic and ecclesial theology has largely failed to analyze, articulate, and critique its own US cultural context and to engage it in a serious evangelical and theological dialogue. In this article, I propose to offer what I believe are four significant insights about to the task of inculturation/contextualization as it relates particularly to Euro-American theology in the church and academy in the coming decade.[1] Stephen B. Bevans And Roger P. Schroeder, Constant in Context: A Theology of Mission for Today, Maryknoll, NY: Orbis Books, 2004, 385-95.See also Bevans and Schroeder, Prophetic Dialogue: Reflections on Christian Mission Today, Maryknoll, NY: Orbis Books, 2011.