bluuebunny/crossref_metadata_2025 huggingface dataset:
Impact Behaviour of Glass Fribre /Epoxy Composites with Nano-Enhanced Resin after Water Exposure
Authors: Landowski M. , Imielińska K.
Published: July 2015

Impact behaviour of glass fibre /epoxy composites with nano- SiO2 modified resin was studied in terms of low velocity impact after water exposure. Nanocomposites with 1%, 2%, 3% 5% 7% nano-SiO2 (Nanopox- Evonic) were investigated. Peak impact load and impact damage area as a function of nanoparticle contents were compared for dry specimens and for samples exposed to water (0.7 %wt. 1.7% water absorbed) at 1J, 2J 3J impact energies. For unmodified composite peak force was higher than for 3% modified specimens and higher for dry specimens than those exposed to water. Impact damage areas were plotted as a function of water contents for modified and unmodified samples. Failure modes were illustrated using SEM micrographs. Numeropus matrix cracks were the dominating failure mode in dry speciemens both unmodified and the modified. Fibre fracture was observed at 3J impact energy in all dry unmodified samples, however water exposure prevented early fibre fracture in nanocomposites. The proposed energy absorption mechanism is nanoparticles debonding.
Checklist of the marine macroalgae of Iran
Authors: Kokabi Maryam , Yousefzadi Morteza
Published: July 2015

In this study, a revised checklist of macroalgae of Iran with an updated nomenclature and taxonomy has been compiled based on published records. Using currently accepted names, 309 species and infraspecific taxa of macroalgae have been identified to date, including 78 Chlorophyta (within 15 families), 70 Ochrophyta (Phaeophyceae; within 7 families) and 161 Rhodophyta (within 30 families). The brown alga Sargassum with 25 taxa was the most diverse genus, and the Rhodomelaceae (Rhodophyta) with 36 taxa was the most species-rich family. The Cheney ratio of 3.4 and the species composition of brown seaweeds suggest that the Iranian marine algal flora is warm-temperate. Sørensen similarity indices were used to compare the marine algal flora of Iran with that of Saudi Arabia within the Persian Gulf and the Sultanate of Oman within the Gulf of Oman. The algal diversity of the Iranian coast within the Gulf of Oman is less than that within the Persian Gulf, and this difference is attributed to undercollecting. Given that this is the first inclusive checklist of macroalgae of Iran, covering the coast lying within the Persian Gulf and the Gulf of Oman, it could serve as a foundation for future phycological and biogeographical studies of the taxa in the country and the region.
Use of NMR spectroscopy in the analysis of carnosine and free amino acids in fermented sausages during ripening
Authors: Mati Marcel , Staruch Ladislav , Šoral Michal
Published: July 2015

Quantitative changes of carnosine and free amino acids in high-fat (43-50 mass %) fermented sausages during ripening were analysed using a 600 MHz VNMRS NMR spectrometer. Seven free amino acids were identified in the samples and a relatively high content of carnosine was observed in the final stage of ripening. The NMR method for the determination of free amino acids and carnosine content applied in this work has been used for the first time and it has proven to be suitable for the analysis of fermented sausages.
Inhibition of CEA release from epithelial cells by lipid A of Gram-negative bacteria
Authors: Naghibalhossaini Fakhraddin , Sayadi Khatere , Jaberie Hajar , Bazargani Abdollah , Eftekhar Ebrahim , Hosseinzadeh Massood
Published: July 2015

A number of bacterial species, both pathogenic and non-pathogenic, use the human CEACAM family members as receptors for internalization into epithelial cells. The GPI-linked CEA and CEACAM6 might play a role in the innate immune defense, protecting the colon from microbial invasion. Previous studies showed that CEA is released from epithelial cells by an endogenous GPI-PLD enzyme. GPI-PLD activity was reported to be inhibited by several synthetic and natural forms of lipid A. We hypothesized that CEA engagement by Gram-negative bacteria might attenuate CEA release from epithelial cells and that this might facilitate bacterial colonization. We tested the hypothesis by examining the effect of Escherichia coli on CEA release from colorectal cancer cells in a co-culture experiment. A subconfluent monolayer culture of colorectal cancer cells (LS-180, Caco-2 and HT29/219) was incubated with E. coli. While there was a significant reduction in CEA secretion from LS-180 and HT29/219 cells, we found only a small reduction of CEA shedding from Caco-2 cells compared to the level from the untreated control cells. Furthermore, lipid A treatment of LS-180 cells inhibited CEA release from the cells in a dosedependent manner. Western blot analysis of total lysates showed that CEA expression levels in cells co-cultured with bacteria did not differ from those in untreated control cells. These results suggest that lipid A of Gram-negative bacteria might play a role in preventing the release of CEA from mucosal surfaces and promote mucosal colonization by bacteria.
Sphingosine-1-phosphate induces the migration and angiogenesis of EPCs through the Akt signaling pathway via sphingosine-1-phosphate receptor 3/platelet-derived growth factor receptor-β
Authors: Wang Hang , Cai Ke-Yin , Li Wei , Huang Hao
Published: July 2015

Endothelial progenitor cells (EPCs) play a fundamental role in neoangiogenesis and tumor angiogenesis. Through the sphingosine-1-phosphate receptor 3 (S1PR3), sphingosine-1-phosphate (S1P) can stimulate the functional capacity of EPCs. Platelet-derived growth factor receptor-beta (PDGFR-β) contributes to the migration and angiogenesis of EPCs. This study aimed to investigate whether S1P induces the migration and angiogenesis of EPCs through the S1PR3/PDGFR-β/Akt signaling pathway. We used the Transwell system and the Chemicon In Vitro Angiogenesis Assay Kit with CAY10444 (an S1PR3 antagonist), AG1295 (a PDGFR kinase inhibitor) and sc-221226 (an Akt inhibitor) to examine the role of the S1PR3/PDGFR-β/Akt pathway in the S1Pinduced migration and angiogenesis of EPCs.
Bioinformatics-based molecular classification of Arthrobacter plasmids
Authors: Mihăşan Marius
Published: July 2015

The omnipresence of Arthrobacter species in polluted and toxic soils indicates their great potential in environmental biotechnologies, but practical applications of these bacteria are scarce mainly due to the availability of useful genetic engineering tools. Although many fully sequenced Arthrobacter genomes have been deposited in GenBank, little is known about the biology of their plasmids, especially the core functions: replication and partition. In this study the available Arthrobacter plasmid sequences were analyzed in order to identify their putative replication origin. At least the oris from the cryptic plasmids pXZ10142, pCG1, and pBL1 appear to work in this genus. Based on ParA homolog sequences, the Arthrobacter specific plasmids were classified into 4 clades. Iteron-like sequences were identified on most of the plasmids, indicating the position of the putative Arthrobacter specific oris. Although attempts were made to identify the core gene set required for plasmid replication in this genus, it was not possible. The plasmid proteomes showed a rather low similarity.
Micro-nanoparticle gels obtained from bark for their use alone and with chitosan and Na-CMC in paper coatings
Authors: Laka Marianna , Treimanis Arnis , Chernyavskaya Svetlana , Skute Marite , Rozenberga Linda , Vikele Laura
Published: July 2015

The effect of coatings on paper sheets has been studied. For this purpose gels were prepared from unextracted and extracted bark. The gels represented dispersions of micro- and nanoparticles. The coatings were also prepared from mixtures of gels with chitosan solutions in 1% acetic acid and aqueous Na-carboxymethylcellulose (Na-CMC) solutions. The properties – Gurley air resistance, water vapour sorption, and mechanical properties of paper sheets – were tested. For obtaining the gels, the bark was destructed by a thermocatalytic method and then dispersed in water in a ball mill. The gels contained mainly nanoparticles with an average size of about 300 nm. Paper sheets produced by the Ligatne Paper Mill (Latvia) were coated on both sides. Gurley air resistance increases with increasing thickness of the coatings and with increasing gel concentration. At a gel concentration of 10% and a coating thickness of 35 μm, air resistance increases by 57% (gel from unextracted bark) and 72% (gel from extracted bark) compared to uncoated paper sheets. The coatings from bark gels in combination with Na-CMC and chitosan solutions increase further the air resistance. The coatings at gel concentrations up to 6% elevate the burst strength and tensile strength in a dry state. The coatings from mixtures of bark gel and chitosan and Na-CMC heighten further the mechanical properties and elevate the water vapour sorption of paper sheets.
Spojka Kým V Sémantických A Komunikačných Súvislostiach
Authors: Sokolová Jana
Published: July 2015

The study focuses on the communication-oriented analysis and interpretation of semantic and communicative (illocutive) functions of the Slovak conjunction kým [‘while’]. Research is based on the text material of the Slovak National Corpus containing synchronic dynamics of the sentence in which the conjunction kým [‘while’] expresses temporal and/or contrastive meanings. Kým [‘while’] is understood as a poly-semantic and poly-functional word which forms relations of limitative, successive, simultaneous and contrastive-simultaneous coincidence between an independent clause (P) and a whileclause (Q). Regarding the semantic functions of the conjunction, the study also discusses the function of temporal and pragmatic collocations, and complementary and competitive use of synonymous conjunctions. It verifies the connections between the actual dispositions of the conjunction kým [‘while’] and a dialogic or narrative interpretation, the choice of perspective and the sentence order. A part of the study presents the use of the conjunction kým [‘while’] in the communicative functions of assertion, direction, interrogation, satisfaction, commission and admonition. It demonstrates the dominance of illocutions which are based on the negative life experience of a speaker
Uniqueness and non-uniqueness in acoustic tomography of moving fluid
Authors: Agaltsov Alexey D. , Novikov Roman G.
Published: July 2015

We consider a model time-harmonic wave equation of acoustic tomography of moving fluid in an open bounded domain in ℝ
d
, d ≥ 2, with variable sound speed c, density ρ, fluid velocity v and absorption coefficient α. We give global uniqueness results for related inverse boundary value problem for the cases of boundary measurements given for two and for three fixed frequencies. Besides, we also give a non-uniqueness result for this inverse problem for the case of boundary measurements given for all frequencies.
xAAL: A Distributed Infrastructure for Heterogeneous Ambient Devices
Authors: Lohr Christophe , Tanguy Philippe , Kerdreux Jérôme
Published: July 2015

Ambient assisted living systems are based on sensors and actuators, with a diversity of network protocols and vendors. This commonly leads to the introduction of gateways or middlewares into the technical infrastructure in order to address interoperability issues. The xAAL framework presented in this paper aims to provide interoperability and to redesign such “gateways” into well-defined functional entities communicating with each other via a lightweight message bus over IP. Each entity may have multiple instances, may be shared between several boxes, and may be physically located in any box. Thanks to the distributed architecture of the system, each home automation vendor may peacefully provide its own xAAL box without revealing details of its technology. Also, several applications may be plugged together on the xAAL bus without getting bored with underlying heterogeneity. Moreover, the management of the dynamicity allows sensors or applications to enter and leave the system at any time.
Perception of emotions in
mild cognitive impairment
and Alzheimer’s dementia:
does intensity matter?
Authors: Elferink Maaike Waanders-Oude , van Tilborg Ilse , Kessels Roy P.C.
Published: July 2015

Background: To provide a review of the literature on the perception of emotion in Alzheimer’s dementia (AD) and
Mild cognitive impairment (MCI), and to evaluate if emotion intensity matters.
Methodology: A systematic literature search of PubMed database was carried out using combinations or
truncated versions of the keywords “MCI”, ”Alzheimer”, “emotion recognition”, “facial emotion recognition”, “social
cognition” or “emotion perception”. Twenty-eight articles were found to meet the inclusion criteria.
Results: Overall, AD patients performed worse on emotion perception than MCI patients and healthy controls.
Half of the studies found an emotion-specific deficit for MCI patients on the emotions anger, sadness and fear.
However, studies taking emotion intensity into account are still scarce.
Conclusions: An emotion-intensity based approach may be more sensitive to detect subtle impairments in facial
emotion recognition. Future studies need to take emotion intensity into account and also consider confounding
factors such as overall cognition and mood.
Gramofon w kręgu reinterpretacji / Gramophone Reinterpretations
Authors: Białas Maciej
Published: July 2015

What is most surprising in the 150-year history of the gramophone (phonograph, record player) is that it has not ended even today. It might appear that progress in phonography which took place in the twentieth century should have made the gramophone a relic of the industrial age. Investigating the reasons why this device is still alive, the author argues that if it survived all through the twentieth century and found is place in the digital age on the eve of the new century, it was only owing to its hidden potential, which allowed creative individuals to rediscover it, find its new uses, attribute new functions and assign it new roles; in short, reinterpret it in diverse ways, the outcome being gramophone music - a new discursive practice with a varied esthetic appearance.

In the first part of the study the author refers to the history of those gramophone reinterpretations and successively describes early literary impressions of the gramophone, the phonograph postulates of Lászlo Moholy-Nagy, Paul Hindemith’s and Ernst Toch’s Grammophonmusik, John Cage’s Imaginary Landscapes, the art of D.J.’s and turntablists, Christian Marclay “creative gramophony”, and experimental turntablism.

The second part of the article analyzes the esthetics of gramophone music. The author distinguishes three trends in it: in the first the gramophone is subordinated to the classical concept of music, in the second it is used to create poly-style sound collages, in the third the gramophone is the tool for the implementations of the principles of conceptual art.

In conclusion the author writes that it is chiefly owing to these reinterpretations which made the sound-recording and playback invention a composer’s tool, a musical instrument and finally an object of elaborate artistic experiments that the gramophone was able to carry out a historic, technological and conceptual revolution in the twentieth-century and early twenty-first century culture.
Persephassa. Xenakisa architektura brzmieniowa dla sześciu perkusistów Persephassa. / Xenakis’s Sound Architecture for Six Percussionists
Authors: Halat Stanisław
Published: July 2015

Musical pieces composed for a percussion ensemble form a significant portion of Iannis Xenakis’s creative achievements. One of major compositions in this genre is his Persephassa (1969) for six percussionists. The set of instruments used by Xenakis is divided into four sound levels: skins (peaux), pieces of wood (bois), metals (metal), effects (pierre). Each percussionist has a wide acoustic array consisting of over a dozen instruments. The sonoric aspect of the piece is enriched through the positioning of the musicians around the audience. The first part of the paper analyzes the form of the composition: its course, division, structural, rhythmical, textural, agogic, energy-containing, and sound solutions, as well as the kinds of culminations and special effects (rhythmical chaos). The other part of the article describes the use of compositional devices that determine the specificity of a musical piece, such as complicated rhythmical structuralism, (resulting from the combinations of elements of probability calculus and computer algorithms) or sonoric effects (e.g. “sound clouds”), discussed in close connection with the problems of performing technique.
Musical Evita Andrew Lloyda Webbera na tle wybranych gatunków muzyki scenicznej XIX i XX wieku* / Andrew Lloyd Webber’s Musical Evita in the Context of Selected Genres of Nineteenth and Twentieth-Century Stage Music
Authors: Bernatowicz Wojciech
Published: July 2015

The analytical study of Andrew Lloyd Webber’s musical Evita contains inter alia the description of the libretto, and the analysis of architectural-formal, rhythmical, and melodic features and stylization devices. In architectural terms, Evita shows the influences of operetta, heroic opera, and musical drama (e.g. in large integrated blocks of scenes, and characteristic final scenes). In the internal formal relations in the piece, the links with the nineteenth-century heroic opera are observable. Regarding the use of form, the composers utilizes those that appeared in Romantic Italian and French operas, while the stylization devices present in the piece have their reference to the nineteenth-century operatic forms in France and operetta compositions. An important structural element of Evita is reminiscence motifs referring inter alia to grand opera. The conscious use of these motifs on such a large scale that have no equivalents in operetta or in the genres preceding the emergence of musical, and in other musicals, causes Evita to be closer to opera in its motivic concept. Owing to the exceptional musical language combining tradition and the present, Webber’s work is an example that the musical as a form of sublime entertainment can also satisfy the requirements of high art.
On mechanism of the bubble bouncing from hydrophilic and hydrophobic solid surfaces
Authors: Zawała Jan , Zawała Piotr , Małysa Kazimierz
Published: July 2015

The kinetics of collision and bouncing of an air bubble on hydrophilic and hydrophobic solid surfaces immersed in distilled water is reported. We carried out the experiments and compared the bubble collision and bouncing courses on the stagnant and vibrating, with a controlled frequency and amplitude, solid/liquid interface. For stagnant interface differences in the outcome of the bubble collisions with hydrophilic and hydrophobic solid surfaces are resulting from different stability of the intervening liquid film formed between the colliding bubble and these surfaces. The liquid film was unstable at Teflon surface, where the three-phase contact (TPC) and the bubble attachment were observed, after dissipation of most of the kinetic energy associated with the bubble motion. For vibrated solid surface it was shown that kinetics of the bubble bouncing is independent on the hydrophilic/hydrophobic properties of the surface. Similarly like at water/glass hydrophilic interface, even at highly hydrophobic Teflon surface time of the bubble collisions and bouncing was prolonged almost indefinitely. This was due to the fact that the energy dissipated during the collision was re-supplied via interface vibrations with a properly adjusted acceleration. The analysis of the bubble deformation degree showed that this effect is related to a constant bubble deformation, which determined constant radius of the liquid film, large enough to prevent the draining liquid film from reaching the critical thickness of rupture at the moment of collision. The results obtained prove that mechanism of the bubble bouncing from various interfaces depends on interrelation between rates of two simultaneously going processes: (i) exchange between kinetic and surface energies of the system and (ii) drainage of the liquid film separating the interacting interfaces.
Wetting properties of the sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and polyoxyethylene (23) lauryl ether (Brij 35) binary mixtures in the poly(tetrafluoroethylene)-solution-air system
Authors: Krawczyk Joanna
Published: July 2015

Wettability of poly(tetrafluoroethylene) (PTFE) by aqueous solutions of binary mixtures composed of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) with polyoxyethylene (23) lauryl ether (Brij 35) was considered on the basis of the measured values of contact angle and surface tension. It was shown that the value of the critical surface tension of PTFE surface wetting at the studied system (23.5 mN/m), does not depend on the concentration and composition of the binary mixtures of studied surfactants in water, and it was higer than the surface tension of PTFE (20.2 mN/m). The best wettability of polytetrafluoroethylene (PTFE) by studied aqueous solutions of binary surfactants mixtures occurs at the mixtures concentration corresponding to the critical micelle concentration of their solutions.
New Data about Ore-Bearing of the Neoproterozoic Flood Basalts (the Ratno Beds, Volhyn, Ukraine) / Nowe dane dotyczące rudonośnych pokryw lawowych z neoproterozoiku (skały osadowe, pokłady, struktury sedymentacyjne w Ratnie, Wołyń, Ukraina)
Authors: Rudenko Kseniia , Derevska Kateryna
Published: July 2015

Wzory rozprowadzenia drugorzędnej mineralizacji i kwestia tektonicznej kontroli mineralizacji powinny zostać rozpoznane w celu identyfikacji cech formowania się metali naturalnych w pokrywach lawowych z neoproterozoiku (Wołyń, Ukraina). Metoda klasyfikacji zmian pozwoliła na stworzenie mapy pęknięć w strukturach sedymentacyjnych w Ratnie w najniższym potoku w celu określenia intensywności pękania skał w strefie uskoku w Czartorysku. W celu ustalenia cech rozprowadzania mineralizacji metali naturalnych w neoproterozoicznych bazaltach przeprowadzono badania mineralogiczne, petrograficzne i geochemiczne. Analiza chemiczna skał wulkanicznych z miedzią, srebrem i złotem została wykorzystana do stworzenia schematów rozprowadzania metali w najniższym potoku bazaltu w strukturach sedymentacyjnych w Ratnie. Dzięki temu dowiadujemy się, że skały wulkaniczne w strefie uskoku w Czartorysku przeszły wiele zmian. Neoproterozoiczne pokrywy lawowe przeszły zmiany w sposób nierównomierny i charakteryzują się podwyższoną koncentracją metali szlachetnych. Regionalne zmiany przybierają formę palagonitu, chlorytu, zeolitów, chalcedonów i analcymów. Wykazano, że kształtowanie nasyconej mineralizacji metali naturalnych (miedź, srebro, nikiel, chrom) jest związane z regionalnymi zmianami w potoku bazaltu w Ratnie. W strefach o podwyższonym pękaniu i brekcji występują kwarc niskotemperaturowy, karbonity i siarczki rozprowadzane miejscowo. Miejsca ostatniej mineralizacji metali (złoto, srebro, ołów) również są miejscowe i związane ze strefami brekcji.
The Spatial Variability of Ridge and Runnel Beach Morphology Due to Beach Placer Mining along the Vembar – Kallar Coast, India / Przestrzenna zmienność morfologii plaży pod kątem grzbietów i strumieni spowodowana powstaniem kopalni złóż okruchowych wzdłuż Vembar – Wybrzeże Kallar w Indiach
Authors: Chandrasekar N. , Saravanan Sakthivel , Rajamanickam M. , Rajamanickam G. Victor
Published: July 2015

Celem tej pracy jest omówienie przestrzennych i krótkotrwałych zmian w morfologii plaży pod kątem grzbietów i strumieni na podstawie profili plaży w Vembar, na wybrzeżu Kallar, Tamil Nadu, Indie. Plaże składają się głównie z średniego do grubego piasku i ciężkich minerałów. Dla plaż charakterystyczne są grzbiety, strumienie i zagłębienia. Grzbiety i strumienie są niewielkie ze względu na prace kopalniane prowadzone w okolicy. Ustalono, że przestrzenne i tymczasowe zmiany w systemie grzbietów i strumieni są kontrolowane przez pianę morską/łamiące się fale. Zmiany objętości sedymentu wynikają z nieregulowanej aktywności kopalni. Erozja ma wpływ na profil wszystkich plaż, zwłaszcza strumieni. Strefy przyrostu znajdują się wyżej, to znaczy na najwyższych grzbietach i wałach plażowych. Krótkotrwałe zmiany wielkości plaży wyjaśniają zniekształcenie grzbietów i strumieni. Ma to związek z pobliską kopalnią. Zaobserwowano wzorzec wiatru wyżej plaży, gdzie warunki pozwalają na transport sedymentu piasku i jego ruch na grzbietach i strumieniach.
Wpływ turystyki na wybrane właściwości gleb na ścieżce dydaktycznej Bukowa Góra (Roztoczański Park Narodowy, Wschodnia Polska) / Impact of Tourism on Selected Properties of Soils of Bukowa Góra Educational Path (Roztoczański National Park, Eastern Poland)
Authors: Dębicki Ryszard , Bilakowska Katarzyna , Chodorowski Jacek , Bartmiński Piotr
Published: July 2015

Celem przeprowadzonych badań jest analiza zmian zachodzących w glebie w wyniku pieszego ruchu turystycznego w obrębie ścieżki dydaktycznej na Bukową Górę w Roztoczańskim Parku Narodowym (RPN). Rezerwat leśny Bukowa Góra położony jest na południe od miasta Zwierzyniec (Roztocze Środkowe, Polska E). Ze względu na dużą atrakcyjność przyrodniczą i krajobrazową już w 1934 roku utworzono tu rezerwat, którego powierzchnia nie przekraczała 8 ha. Celem ochrony jest zachowanie pięknych drzewostanów jodłowych i jodłowo-bukowych, wchodzących w skład zespołów wyżynnego boru jodłowego i buczyny karpackiej oraz zabezpieczenie rzadkich przedstawicieli fauny i flory. W wyniku udeptywania zmianom ulegają niektóre cechy morfologiczne powierzchniowych poziomów genetycznych. Dotyczy to przede wszystkim poziomu organicznego O, którego brak w profilach na ścieżce, a także poziomu próchnicznego A, nadbudowanego deluwiami w profilach zlokalizowanych w dolnych partiach ścieżki. Ponadto w glebach poddanych presji turystycznej zmniejsza się na ogół wilgotność aktualna, kapilarna pojemność wodna i maksymalna pojemność wodna, natomiast wzrasta gęstość objętościowa w porównaniu z glebami kontrolnymi poza ścieżką. Zależność ta jest najbardziej widoczna na głębokości 0-5 cm. Dodatkowo gleby występujące na ścieżce cechują się wyższymi wartościami pH oraz niższymi wartościami kwasowości hydrolitycznej i pojemności sorpcyjnej.
Components with the expected codimension in the moduli scheme of stable spin curves
Authors: Ballico Edoardo
Published: July 2015

Here we study the Brill-Noether theory of “extremal” Cornalba’s theta-characteristics on stable curves C of genus g, where “extremal” means that they are line bundles on a quasi-stable model of C with #(Sing(C)) exceptional components
Statuses and double branch weights of quadrangular outerplanar graphs
Authors: Bielak Halina , Powroźnik Kamil
Published: July 2015

In this paper we study some distance properties of outerplanar graphs with the Hamiltonian cycle whose all bounded faces are cycles isomorphic to the cycle C4. We call this family of graphs quadrangular outerplanar graphs. We give the lower and upper bound on the double branch weight and the status for this graphs. At the end of this paper we show some relations between median and double centroid in quadrangular outerplanar graphs
A multidimensional singular stochastic control problem on a finite time horizon
Authors: Boryc Marcin , Kruk Łukasz
Published: July 2015

A singular stochastic control problem in n dimensions with timedependent coefficients on a finite time horizon is considered. We show that the value function for this problem is a generalized solution of the corresponding HJB equation with locally bounded second derivatives with respect to the space variables and the first derivative with respect to time. Moreover, we prove that an optimal control exists and is unique
RhoB upregulation leads to either apoptosis or cytostasis through differential target selection
Authors: Marlow Laura A , Bok Ilah , Smallridge Robert C , Copland John A
Published: July 2015

Anaplastic thyroid carcinoma is a highly aggressive undifferentiated carcinoma with a mortality rate near 100% due to an assortment of genomic abnormalities which impede the success of therapeutic options. Our laboratory has previously identified that RhoB upregulation serves as a novel molecular therapeutic target and agents upregulating RhoB combined with paclitaxel lead to antitumor synergy. Knowing that histone deacetylase 1 (HDAC1) transcriptionally suppresses RhoB, we sought to extend our findings to other HDACs and to identify the HDAC inhibitor (HDACi) that optimally synergize with paclitaxel. Here we identify HDAC6 as a newly discovered RhoB repressor. By using isoform selective HDAC inhibitors (HDACi) and shRNAs, we show that RhoB has divergent downstream signaling partners, which are dependent on the HDAC isoform that is inhibited. When RhoB upregulates only p21 (cyclin kinase inhibitor) using a class I HDACi (romidepsin), cells undergo cytostasis. When RhoB upregulates BIMEL using class II/(I) HDACi (belinostat or vorinostat), apoptosis occurs. Combinatorial synergy with paclitaxel is dependent upon RhoB and BIMEL while upregulation of RhoB and only p21 blocks synergy. This bifurcated regulation of the cell cycle by RhoB is novel and silencing either p21 or BIMEL turns the previously silenced pathway on, leading to phenotypic reversal. This study intimates that the combination of belinostat/vorinostat with paclitaxel may prove to be an effective therapeutic strategy via the novel observation that class II/(I) HDACi antagonize HDAC6-mediated suppression of RhoB and subsequent BIMEL, thereby promoting antitumor synergy. These overall observations may provide a mechanistic understanding of optimal therapeutic response.
Reagent and Data Resources for Investigation of RNA Binding Protein Functions inDrosophila melanogasterCultured Cells
Authors: Mohr Stephanie E , Hu Yanhui , Rudd Kirstin , Buckner Michael , Gilly Quentin , Foster Blake , Sierzputowska Katarzyna , Comjean Aram , Ye Bing , Perrimon Norbert
Published: July 2015

RNA binding proteins (RBPs) are involved in many cellular functions. To facilitate functional characterization of RBPs, we generated an RNA interference (RNAi) library for Drosophila cell-based screens comprising reagents targeting known or putative RBPs. To test the quality of the library and provide a baseline analysis of the effects of the RNAi reagents on viability, we screened the library using a total ATP assay and high-throughput imaging in Drosophila S2R+ cultured cells. The results are consistent with production of a high-quality library that will be useful for functional genomics studies using other assays. Altogether, we provide resources in the form of an initial curated list of Drosophila RBPs; an RNAi screening library we expect to be used with additional assays that address more specific biological questions; and total ATP and image data useful for comparison of those additional assay results with fundamental information such as effects of a given reagent in the library on cell viability. Importantly, we make the baseline data, including more than 200,000 images, easily accessible online.
TAXONOMÍA Y DISTRIBUCIÓN DE DIATOMEAS EPILÍTICAS REGISTRADAS POR PRIMERA VEZ EN COLOMBIA I
Authors: Sala Silvia Estela , Vouilloud Amelia Alejandra , Plata-Díaz Yasmin , Pedraza Edna , Pimienta Astrid
Published: July 2015

El presente trabajo se llevó a cabo en el marco del proyecto para elaborar un índice de calidad biológica para ríos de zonas bajas y de piedemonte del país basado en comunidades biológicas acuáticas, desarrollado en el Laboratorio de Biotecnología del Instituto Colombiano del Petróleo, cuyo objetivo es evaluar la calidad ecológica de los ríos de tierras bajas y de piedemonte dentro del área de influencia de Ecopetrol, a través de la implementación de un índice de calidad biológica utilizando diatomeas. Las 165 muestras analizadas hasta el momento provienen de muestras de perifiton de 83 sistemas lóticos de distintas regiones del país, de donde también se obtuvo información sobre temperatura del agua, pH, conductividad y oxígeno disuelto. El material fue estudiado con microscopio óptico y microscopio electrónico de barrido. Aquí reunimos 11 taxones de los cuales Achnanthidium macrocephalum (Hustedt) Round & Bukhtiyarova, Cymbopleura zimmermannii Metzeltin & Lange-Bertalot, Chamaepinnularia brasiliana Metzeltin & Lange-Bertalot, Ch. brasilianopsis Metzeltin & Lange-Bertalot, Planothidium lagerheimii (Cleve) Wetzel & Ector, Eunotioforma curvula (Hustedt) Kociolek & Burliga, Gomphonema archaevibrio fo. cuneatum Metzeltin & Lange-Bertalot, Gomphonema capitatum Ehrenberg, Nitzschia clausii Hantzsch y N. filiformis var. conferta (Richter) Lange-Bertalot se mencionan por primera vez para Colombia.Este el primer registro del género Eunotioforma Kociolek & Burliga y por primera vez que se describe e ilustra el género Chamaepinnularia para el país. Además analizamos la ultraestructura de Nitzschia dissipata (Kützing) Grunow, ya mencionada para el país pero solo analizada con MO. A pesar de ser una especie considerada cosmopolita citada en las floras de diferentes regiones del mundo, ha sido frecuentemente mal identificada por lo que este análisis nos permitió confirmar la identidad de los materiales colombianos.
THE EPIPHYTIC BRYOPHYTE FLORA OF THE COLOMBIAN AMAZON
Authors: Campos Laura V. , Steege Hans Ter , Uribe Jaime
Published: July 2015

An inventory of 384 plots on 64 trees, in four localities across the Colombian Amazon region (Amazonas, Caquetá, Putumayo, Vaupés), yielded 160 species of epiphytic bryophytes (116 of liverworts, 44 of mosses), in 64 genera and 26 families. Sampling was carried out in four upland rainforest sites (Terra Firme), where bryophytes where collected from the base to the outer canopy, of 16 trees per locality. The flora is characterized by dominance of liverworts, especially Lejeuneaceae. The families with the highest number of records were Lejeuneaceae (55%), Calymperaceae (10%), Lepidoziaceae (8%), Octoblepharaceae (6%) and Sematophyllaceae (5%). The most common genera in number of records were Cheilolejeunea (11%), Pycnolejeunea (8%), Archilejeunea (8%) Ceratolejeunea (8%) and Syrrhopodon (7%). Syrropodon and Lejeunea were the most species-rich genera, followed by Ceratolejeunea and Cheilolejeunea. In average, the localities had 102 species in sixteen phorophytes. In terms of species richness and composition there were no significant differences between the four localities.
Pitcairnia huilensis: una atractiva bromeliácea nueva de Colombia
Authors: Betancur Julio , Jiménez-Escobar N. David
Published: July 2015

Se describe, ilustra y discute una nueva especie de Pitcairnia (Bromeliaceae). Esta especie es endémica de Colombia y se encuentra en los enclaves secos de los valles interandinos de la cuenca alta del río Magdalena, departamento de Huila.
REPRODUCTIVE BIOLOGY OF THE VENEZUELA ROUND STINGRAY Urotrygon venezuelae SCHULTZ FROM THE COLOMBIAN CARIBBEAN
Authors: Acevedo Kelly , Moreno Fabián , Grijalba-Bendeck Marcela , Acero Arturo , Paramo Jorge
Published: July 2015

As for most batoid species, little is known about the basic biology of the Venezuela round stingray Urotrygon venezuelae (Urotrygonidae). This study presents information about the reproductive biology of the species, including fecundity, embryonic development stage, relationship between maternal size and fecundity, gonadosomatic (GSI) and hepatosomatic (HSI) indices, sex ratios, maturity size and size at birth. With all this information, a preliminary reproductive cycle is proposed. A total of 269 specimens were caught with beach seine in Salguero beach, Colombian Caribbean Sea, between August 2005 and October 2006. We propose for U. venezuelae a biological cycle with three reproductive peaks: November-December, March-April and August. Median sexual maturity size was calculated in 176 mm (total length) for females and 227 mm for males; fecundity ranged between one and six embryos per female. We found that cloacal diameter and liver weight were better predictors for fecundity than total length for U. venezuelae.
Hyphessobrycon natagaima (Characiformes: Characidae) a new species from Colombia, with a key to the Magdalena Basin Hyphessobrycon species
Authors: García-Alzate Carlos A. , Taphorn Donald C. , Roman-Valencia Cesar , Villa-Navarro Francisco A.
Published: July 2015

A new species, Hyphessobrycon natagaima, is described from the upper Magdalena River Basin in Colombia. It differs from all other species of Hyphessobrycon with a dark lateral stripe inhabiting the Magdalena River Basin: H. poecilioides, H. proteus and H. ocasoensis, by having eight to twelve pored lateral-line scales (vs. 14-26); four scales between the lateral line and the pelvic-fin insertions (vs. five or six); one tooth on the maxilla (vs. zero in H. poecilioides, and two to five in H. proteus; except H. ocasoensis, with one), a dark, interrupted, lateral stripe that is not in contact with the caudal peduncle spot (vs. absence of caudal spot in H. poecilioides, lateral stripe continued that is in contact with the caudal peduncle spot in H. ocasoensis). It has a rhomboid shaped caudal-peduncle spot that continues on to middle caudal-fin rays (vs. absence of caudal peduncle spot in H. poecilioides and caudal peduncle spot round and not continued on to middle caudal-fin rays in H. ocasoensis); and presence of hooks on all fins in mature males (vs. males with hooks on anal, pelvic and pectoral fins). Hyphessobrycon natagaima differs from H. ocasoensis, in addition to the above characters, by having four scale rows between the lateral line and the anal-fin origin (vs. six); three or four scale rows between the lateral line and the pelvic-fin insertions (vs. six); ten or eleven predorsal scales (vs. nine); i,9,i dorsal-fin rays (vs. ii,8,i); 18-20 branched anal-fin rays (vs. 21-22) and eleven branched pectoral-fin rays (vs. twelve). A key for the identification of Hyphessobrycon species present in the Magdalena River Basin is provided.
Selective Solar Absorption of Nanofluids for Photovoltaic/Thermal Collector Enhancement
Authors: Hjerrild Natasha E. , Mesgari Sara , Crisostomo Felipe , Scott Jason A. , Amal Rose , Jiang Xuchuan , Taylor Robert A.
Published: July 2015

Selectively-absorbing nanofluids were synthesized and evaluated for spectrum splitting PV/T collector applications. Core-shell silver-silica (Ag-SiO2) nanodiscs and multi-walled carbon nanotubes (MWCNTs) were suspended in water at varying dilutions and then tested as an optical filter placed between a light source and silicon solar cell. A concentrated Ag-SiO2 solution diluted with an aqueous MWCNT solution yielded higher thermal efficiencies than when diluted by the same volume of water. However, AgSiO2-MWCNT mixtures yielded a lower electrical output than aqueous AgSiO2 dilutions due to the non-selective absorption of MWCNTs. The most concentrated Ag-SiO2 nanofluid (0.026wt%) yielded a peak thermal efficiency of 65%, to deliver the greatest combined efficiency of ∼72%.
Structure and conductivity of fuel cell membranes and catalytic layers investigated by AFM
Authors: Hiesgen Renate , Morawietz Tobias , Handl Michael , Friedrich K. Andreas
Published: July 2015

In this work, the structure and conductive structure of perfluorinated sulfonated ionomers were investigated by tapping mode, material sensitive atomic force microscopy (AFM). At cross section of membranes, large ordered lamellar-like areas were found. From adhesion force mappings, approximately 50 nm large water-rich areas could be identified by their low adhesion. These areas were interpreted as ionically conductive phase. They appeared circular and isolated before any forced current flow through the sample (activation). After activation, branched, long and flat ionically conductive phase structures in direction of applied voltage were found. They were interpreted as the formation of a continuous ionically conducting network formed by the current flow. In a second part, the material sensitive imaging was used to analyze the distribution of ionomer and platinum covered carbon particles in fuel cell electrodes. The analysis was based on the high adhesion of ionomers compared to the carbon supported catalyst particles.
Mining Periodic Traces of an Entity on Web
Authors: Huang Xinyan , Wang Xinjun , Zhang Yan , Zhao Jinxin
Published: July 2015

A trace of an entity is a behavior trajectory of the entity. Periodicity is a frequent phenomenon for the traces of an entity. Finding periodic traces for an entity is essential to understanding the entity behaviors. However, mining periodic traces is of complexity procedure, involving the unfixed period of a trace, the existence of multiple periodic traces, the large-scale events of an entity and the complexity of the model to represent all the events. However, the existing methods can’t offer the desirable efficiency for periodic traces mining. In this paper, Firstly, a graph model(an event relationship graph) is adopted to represent all the events about an entity, then a novel and efficient algorithm, TracesMining, is proposed to mine all the periodic traces. In our algorithm, firstly, the cluster analysis method is adopted according to the similarity of the activity attribute of an event and each cluster gets a different label, and secondly a novel method is proposed to mine all the Star patterns from the event relationship graph. Finally, an efficient method is proposed to merge all the Stars to get all the periodic traces. High efficiency is achieved by our algorithm through deviating from the existing edge-by-edge pattern-growth framework and reducing the heavy cost of the calculation of the support of a pattern and avoiding the production of lots of redundant patterns. In addition, our algorithm could mine all the large periodic traces and most small periodic traces. Extensive experimental studies on synthetic data sets demonstrate the effectiveness of our method.
ANN Training Method with a Small Number of Examples Used for Robots Control
Authors: Ciupan Emilia , Lungu Florin , Ciupan Cornel
Published: July 2015

This paper presents a method for obtaining a neural model used in industrial robots control. The method refers to the forming of a small number of examples used in the training of a neural network that lead to the creation of a suitable model. This paper constitutes a development of the work [2] in order to increase the opportunities for its application in various fields. The description of the method is generally done, without relying on a specific application in the domain of industrial robots. The testing and the validation of the shown method were completed using the example of a system in which the relationship between inputs and outputs is described by means of mathematical functions. The set of learning examples, generated through the proposed method, served to the ANN training by a cross-validation technique, in case of these functions. The evaluation of the proposed method has been done by analysing the results obtained by applying it compared to those obtained with a known method, namely the uniform generation of training examples. The use of the method in the field of industrial robots’ control was illustrated by a concrete application in the case of a robot with 6 degrees of freedom.
Advisory, Negotiation and Intelligent Decision Support System for Leadership Analysis
Authors: Gudauskas Renaldas , Budryte Loreta , Kaklauskas Arturas , Cerkauskas Justas , Kuzminske Agne , Jokubauskiene Saule , Targamadze Vilija
Published: July 2015

The development of the Leader Model for quantitative and qualitative analyses began with the goal of integrating managerial, organizational, technical, technological, economic, legal/regulatory, innovative, social, cultural, ethical, psychological, religious, ethnic and other aspects involved in the process of a leaders life cycle. The need to determine the most efficient life cycle of a leader led to the development of the Advisory, Negotiation and Intelligent DEcision support System for Leadership Analysis (ANDES). The objective of the authors of this work for integrating text analytics, advisory, negotiation and decision support systems is to improve the quality and efficiency of intelligent decision-making regarding a leaders life cycle. This ANDES consists of an intelligent database, database management system, model-base, model-base management system and user interface.
Palmer Amaranth (Amaranthus palmeri) Management in Dicamba-Resistant Cotton
Authors: Cahoon Charles W. , York Alan C. , Jordan David L. , Everman Wesley J. , Seagroves Richard W. , Culpepper A. Stanley , Eure Peter M.
Published: July 2015

Cotton growers rely heavily upon glufosinate and various residual herbicides applied preplant, PRE, and POST to control Palmer amaranth resistant to glyphosate and acetolactate synthase-inhibiting herbicides. Recently deregulated in the United States, cotton resistant to dicamba, glufosinate, and glyphosate (B2XF cotton) offers a new platform for controlling herbicide-resistant Palmer amaranth. A field experiment was conducted in North Carolina and Georgia to determine B2XF cotton tolerance to dicamba, glufosinate, and glyphosate and to compare Palmer amaranth control by dicamba to a currently used, nondicamba program in both glufosinate- and glyphosate-based systems. Treatments consisted of glyphosate or glufosinate applied early POST (EPOST) and mid-POST (MPOST) in a factorial arrangement of treatments with seven dicamba options (no dicamba, PRE, EPOST, MPOST, PRE followed by [fb] EPOST, PRE fb MPOST, and EPOST fb MPOST) and a nondicamba standard. The nondicamba standard consisted of fomesafen PRE, pyrithiobac EPOST, and acetochlor MPOST. Dicamba caused no injury when applied PRE and only minor, transient injury when applied POST. At time of EPOST application, Palmer amaranth control by dicamba or fomesafen applied PRE, in combination with acetochlor, was similar and 13 to 17% greater than acetochlor alone. Dicamba was generally more effective on Palmer amaranth applied POST rather than PRE, and two applications were usually more effective than one. In glyphosate-based systems, greater Palmer amaranth control and cotton yield were obtained with dicamba applied EPOST, MPOST, or EPOST fb MPOST compared with the standard herbicides in North Carolina. In contrast, dicamba was no more effective than the standard herbicides in the glufosinate-based systems. In Georgia, dicamba was as effective as the standard herbicides in a glyphosate-based system only when dicamba was applied EPOST fb MPOST. In glufosinate-based systems in Georgia, dicamba was as effective as standard herbicides only when dicamba was applied twice.