bluuebunny/crossref_metadata_2025 huggingface dataset:
Morphological Evolution of the Lower Tisza River (Hungary) in the 20th Century in Response to Human Interventions
Authors: Amissah Gabriel J. , Kiss Tímea , Fiala Károly
Published: July 2018

To understand the hydro-morphological responses of a river to engineering works is a key to future sustainable engineering projects. The Tisza River in the Carpathian Basin has been the subject of human interventions in the 19th–20th centuries, with regular monitoring since the first intervention. Therefore, it provides a unique opportunity to understand the long-term responses of a lowland river on engineering works. Here the interventions include the construction of embanked levees, artificial meander cutoffs, construction of revetments and groynes, and construction of lock-dams, whose differing effects can be analysed in detail. The Lower Tisza River, Hungary was shortened by up to a third of its 89-km length during late-19th-century regulation works. Simultaneously, it was disconnected from its 10–20 km wide natural floodplain, which was restricted to 1–5 km. Revetments were constructed along 25% of the banks since the early 20th century. This paper evaluates the effects of these regulation works on the Lower Tisza channel based on channel-surveys (1891, 1931, 1961, 1976 and 1999). Based on the results, the channel responded to every stage of the regulation works by adjusting its cross-sectional area, thalweg depth and bankfull width. From 1891 to 1961, the cross-sectional area of the channel increased in response to the artificial meander cutoffs through rapid incision and channel widening. The construction of revetments and groynes distorted this morphological development. After their construction, the cross-sectional area of the channel reduced by up to 50% between 1961 and 1976. The channel experienced incision and narrowing within this period. Whilst the morphological response of the river to cutoffs was improved flood conveyance, the revetments drastically decreased the flood conveyance; therefore, the flood levels increased without an increase in discharge, so the revetment constructions indirectly increased the flood risk.
ASSESSMENT CRITERIA OF PROJECT RISK MANAGEMENT IN LANGUAGE TRANSLATION SERVICE COMPANIES
Authors: Zaveckaite Asta , Ulbinaite Aurelija
Published: July 2018

Risk management in translation service companies is an effective, integrative, proactive way to handle risk. Such companies must integrate defined long-term risk management into their strategies, decision-making, and daily processes; top-management must fully support the risk management system; risk factors, management benefits, and processes require articulation amongst employees; job roles, responsibilities, performance evaluation, and motivation systems must incorporate risk management practices. Risk management in project-based companies might also account for changing clients’ requirements, tight deadlines and budgets, different participants, and high IT use. However, this requires identifying the critical success factors. The research method builds upon the analysis and systemization of the scientific literature – from risk management, emphasizing the underlying strategic approach and effective management, to deriving the focal-points of effective risk management of translation projects. This work unifies the gathered knowledge and results in a conceptual model that integrates the specific assessment criteria for project risk management in translation companies – process definiteness and versatility, responsibility definiteness, top-management involvement, and risk management communication. The operationalisation of the model may lead to the companies’ critical success performance. To the best of our knowledge, this work is one of the first contributions addressing risk management assessment criteria in this industry.
ANALYSIS AND EVALUATION OF BUSINESS PROCESS SIMULATION TOOLS / VERSLO PROCESŲ SIMULIAVIMO PRIEMONIŲ ANALIZĖ IR VERTINIMAS
Authors: Grašys Remigijus , Vasilecas Olegas
Published: July 2018

Looking for ways to increase operational efficiency, more and more companies focus on process evaluation. A proper analysis of process weaknesses can reveal activities in need of improvement. In order to choose a business process modelling tool that meets user needs, every tool has to be evaluated according to different criteria. Business rules are an integral part of business and the authors propose evaluating business process modelling tools using a new criteria set: capabilities of work with business rules.
Straipsnyje analizuojamas verslo procesų modeliavimo priemonių, gebančių vykdyti verslo procesų simuliavimą, vertinimo kriterijų karkasas ir vertinimo kriterijai. Siūloma išplėsti verslo procesų modeliavimo priemonių vertinimo kriterijų karkasą papildoma vertinimo kriterijų grupe – darbo su verslo taisyklėmis galimybėmis. Pasiūlyti kriterijai naudojami pasiren­kant vartotojo poreikius atitinkančią verslo procesų modeliavimo ir simuliavimo priemonę.
NETWORK TRAFFIC ANOMALIES DETECTING USING MAXIMUM ENTROPY METHOD / KOMPIUTERIŲ TINKLO SRAUTO ANOMALIJŲ ATPAŽINIMAS MAKSIMALIOS ENTROPIJOS METODU
Authors: Mažeika Dalius , Jasonis Saulius
Published: July 2018

The problem of traffic anomalies in computer networks is analyzed. NetFlow packets are used as network traffic data and maximum entropy methods is used for anomalies detection. Method detects network anomalies by comparing the current network traffic against a baseline distribution. Method is adopted according to NetFow data and performace of the method is improved. Prototype of anomalies detection system was developed and experimental investigation carried out. Results of investigation confirmed that method is sensitive to deviations of the network traffic and can be successfully used for network traffic anomalies detection.
Straipsnyje nagrinėjama kompiuterių tinklo srauto anomalijų atpažinimo problema. Kompiuterių tinklo srautui stebėti pasirenkama NetFlow technologija, o anomalijos aptinkamos maksimalios entropijos metodu. Metodas pritaikytas NetFlow pateikiamiems duomenims apdoroti. Sukurta programinė priemonė ir atliktas eksperimentinis metodo tinkamumo tyrimas analizuojant „Cisco“ maršrutizatoriaus srauto duomenis. Metodas patobulintas siekiant pagreitinti skaičiavimus, tačiau neprarandant tikslumo. Nustatyta, kad metodas yra jautrus įvairaus tipo tinklo srauto nuokrypiams ir gali būti sėkmingai taikomas tinklo srauto anomalijoms aptikti.
INTEGRATION OF SENSOR ORIENTATION DATA INTO AN AUGMENTED REALITY TECHNOLOGY / JUTIKLIŲ ORIENTACIJOS DUOMENŲ INTEGRACIJA PAPILDYTOSIOS REALYBĖS TECHNOLOGIJOJE
Authors: Artemčiukas Edgaras , Sakalauskas Leonidas
Published: July 2018

Currently, such microelectromechanical sensors as accelerome­ters, gyroscopes and magnetometers are the dominant sensors in mobile devices. The market of mobile devices is constantly expanding and focused on sensor integration process by adding supplementary functionality for the applications; therefore, it is possible to adapt these sensors for augmented reality technology solutions. Many augmented reality solutions are based on computer vision processing methods in order to identify and track markers or other objects. However, the main problem is chaotic environment, lighting conditions where object recognition and tracking in real-time becomes difficult and sometimes is an impossible process. This paper analyses possibilities to apply microelectromechanical sensors. Additionally, it investigates quaternion use for sensor data to estimate reliable and accurate camera orientation and represent virtual content in augmented reality technology.
Šiuo metu mikroelektromechaniniai jutikliai (akcelerometrai, giroskopai ir magnetometrai) dominuoja mobiliuosiuose įrenginiuose. Mobiliųjų įrenginių rinka nepaliaujamai plečiasi ir telkiasi į jutiklių integracijos procesą, kuriamoms aplikacijoms pridedama papildomo funkcionalumo. Tokiu būdu suteikiama galimybė pritaikyti jutiklių informaciją priimant papildytosios realybės technologijos sprendimus. Daugelis papildytosios realybės sprendimų veikia remiantis vaizdų apdorojimo metodais, norint atpažinti ir sekti žymeklį ar kitus objektus bei atvaizduoti kompiuteriu generuojamą virtualų turinį. Pagrindinė tokių metodų problema – netvarkinga aplinka, apšvietimo sąlygos, todėl objektą atpažinti ir sekti realiuoju laiku tampa sudėtinga arba neįmanoma. Darbe nagrinėjamos mikroelektromechaninių jutiklių naudojimo galimybės ir kvaternionų taikymas jutiklių duomenims, norint patikimai ir tiksliai įvertinti kameros orientaciją erdvėje. Tokiu būdu virtualus turinys atvaizduojamas papildytosios realybės technologijoje, netaikant vaizdų apdorojimo metodų.
HEXAPOD WALKING ROBOT ENERGY CONSUMPTION DEPENDENCE ON DIFFERENT GAITS AND SPEED WHILE MOVING ON EVEN TERRAIN / ŠEŠIAKOJO ROBOTO ENERGIJOS SĄNAUDŲ PRIKLAUSOMYBĖS NUO SKIRTINGŲ EISENŲ IR GREIČIO JUDANT LYGIU PAVIRŠIUMI TYRIMAS
Authors: Luneckas Mindaugas , Luneckas Tomas
Published: July 2018

Evaluation of robotic energetics while moving on rough terrain becomes a difficult task without having the information about the movement on even terrain. The problem appears in selection of gaits depending on how much power robot consumes. In this paper, energy consumption of a hexapod walking robot dependence on different gaits and speed is observed. Three most common gaits were used in this experiment: tripod gait, bipod gait and wave gait. Results clearly show that while moving at slow speed, the least energy is consumed by wave gait. As the speed increases, bipod gait selection is required to lower energy consumption. Finally, tripod gait must be selected at even higher speed.
Nežinant šešiakojo vaikščiojančio roboto energijos sąnaudų judant lygiu paviršiumi, yra sudėtinga įvertinti sąnaudas judant nelygiu paviršiumi bei parinkti taupiausią eiseną ir judėjimo greitį. Darbo tikslas yra išmatuoti suvartojamą energijos kiekį judant skirtingomis eisenomis ir parinkti greičius, kai tikslinga keisti eiseną. Tiriamos trys pagrindinės šešiakojų robotų eisenos: trikojė, dvikojė ir banguojanti. Rezultatai akivaizdžiai rodo, kad, esant mažiems greičiams, mažiausiai energijos robotas suvartoja judėdamas banguojančia eisena. Didėjant greičiui, mažiau energijos suvartojama judant dvikoje eisena, o dar padidėjus – judant trikoje eisena.
DESIGN OF A 65 NM CMOS COMPARATOR WITH HYSTERESIS / 65 NM KMOP TECHNOLOGIJOS HISTEREZINIO KOMPARATORIAUS PROJEKTAVIMAS
Authors: Vasjanov Aleksandr , Barzdėnas Vaidotas
Published: July 2018

The comparator can be described as one of the basic building blocks in electronics. It is implemented both as a discrete device and as a constituent of a complex circuit. In both cases, the circuits usually operate in conditions, where useful and unwanted (noise) signals are present at the same time. In order to maintain the validity of output data, a hysteresis parameter is introduced to the comparator’s circuit. This article presents the results of a CMOS comparator with hysteresis design – the schematic, topology and simulation results are analyzed. The designed comparator is implemented in a zero voltage offset compensation circuit ADC in a multi-standard transceiver IC.
Komparatorius yra vienas iš pagrindinių elektronikos įtaisų. Jis yra naudojamas kaip diskretinis elementas arba kaip viena iš sudėtingesnės sistemos sudedamųjų dalių. Šie įtaisai dažnai veikia elektronikos sistemose, kuriose egzistuoja ne tik informaciją nešantys bei apdorojami signalai, bet ir nepageidautini triukšmo signalai. Siekiant tokiomis sąlygomis užtikrinti patikimą ir efektyvią komparatoriaus veiką, imama taikyti histerezė. Šiame straipsnyje pateikiami TSMC 65 nm KMOP histerezinio komparatoriaus projektavimo rezultatai: aptariama principinė elektrinė schema, pateikiama suprojektuota topologija, jos kompiuterinio modeliavimo rezultatai bei išvados. Šis komparatorius bus naudojamas daugiastandarčio, daugiakanalio siųstuvo-imtuvo grandinėje, nulinio potencialo poslinkio įtampą nustatančiame, lygiagrečios architektūros analoginiame skaitmeniniame keitiklyje (ASK).
LTE FDD AND SRD EQUIPMENT COMPATIBILITY IN 2500 MHZ BAND / LTE FDD IR SRD ĮRENGINIŲ SUDERINAMUMAS 2500 MHZ RUOŽE
Authors: Stankevičius Evaldas
Published: July 2018

This paper examines the LTE mobile communication base stations possible interfering effects on short range communication devices operating in ISM frequency band. LTE network is running in 2500–2690 MHz frequency band, where frequency channel distribution is used. Downlink channels are assigned to base stations and formed in 2620–2680 MHz band, uplink channels are assigned to mobile stations and formed in 2500–2560 MHz band. Short range communication devices operate in 2400–2483.5 MHz frequency range. The main problem of this study – the interference probability and magnitude. Real equipment was simulated using two different modelling software systems for investigation of electromagnetic compatibility: ICS Telecom and Seamcat. The modelling results show that LTE BS have minimum or no impact on operation of short range communication devices in ISM frequency band.
Nagrinėjamas LTE mobiliojo ryšio bazinių stočių galimas interferencinis poveikis nedidelio veikimo nuotolio įrenginiams. LTE tinklas veikia 2500–2690 MHz dažnių ruože, naudojamas dažninis kanalų dalijimas. Žemynkrypčiai kanalai, priskiriami bazinėms stotims, formuojami 2620–2680 MHz ruože, aukštynkrypčiai kanalai, priskiriami mobiliosioms stotims, formuojami 2500–2560 MHz ruože. Trumpojo veikimo nuotolio įrenginiai veikia 2400–2483,5 MHz dažnių ruože. Pagrindinė šio tyrimo problema – galima interferencija ir jos mastas. Realus įrenginių veikimas modeliuojamas dviejomis skirtingomis programomis, kurios skirtos elektromagnetiniam suderinamumui tirti: ICS Telecom ir Seamcat.
INVESTIGATION OF GYROELECTRIC WAVEGUIDES WITH ANISOTROPIC DIELECTRIC LAYER / GIROELEKTRINIŲ BANGOLAIDŽIŲ SU ANIZOTROPINIU DIELEKTRIKO SLUOKSNIU TYRIMAS
Authors: Plonis Darius , Mališauskas Vacius
Published: July 2018

In this paper the open, circular cross-section cylindrical gyro- electric p-GaAs (semiconductor-dielectric) waveguides with temperature-sensitive anisotropic dielectric layer are investigated. The gyroelectric phase shifters without anisotropic dielectric layer are not effective. The anisotropic layer increases the mode HE11 differential phase shift to 1060° and 1250°, when temperature T = (125–200) K, N = 5∙1019 and N = 1020 m–3 respectively. Propagated mode HE11 in gyroelectric p-GaAs waveguides, the attenuation coefficient increases, increasing the concentration of holes. The anisotropic dielectric layer reduces the mode attenuation, it is appropriate to create gyroelectric mode phase shifters with a lower hole concentration and anisotropic dielectric layer.
Tiriami atvirieji, apskritojo skerspjūvio cilindriniai, giroelektriniai p-GaAs (puslaidininkiniai-dielektriniai) bangolaidžiai su jautriais temperatūrai puslaidininkine šerdimi ir anizotropiniu dielektriko sluoksniu. Šis sluoksnis padidina hibridinių pagrindinio tipo HE11 bangų diferencinį fazės pokytį iki 1060° ir 1250°, kylant temperatūrai (125–200) K ruože, kai puslaidininkio skylučių koncentracija N atitinkamai yra 5∙1019 m–3 ir 1020 m–3. Giroelektriniuose p-GaAs bangolaidžiuose HE11 bangų silpimo koeficientas didėja, didinant skylučių koncentraciją, bet anizotropinio dielektriko sluoksnis mažina bangų silpimą. Todėl, kuriant temperatūra valdomus giroelektrinius bangų fazės keitiklius, tikslinga naudoti bangolaidžius su mažesnės koncentracijos skylutėmis ir jautriu temperatūrai anizotropinio dielektriko sluoksniu.
The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic H i Source Catalog
Authors: Haynes Martha P. , Giovanelli Riccardo , Kent Brian R. , Adams Elizabeth A. K. , Balonek Thomas J. , Craig David W. , Fertig Derek , Finn Rose , Giovanardi Carlo , Hallenbeck Gregory , Hess Kelley M. , Hoffman G. Lyle , Huang Shan , Jones Michael G. , Koopmann Rebecca A. , Kornreich David A. , Leisman Lukas , Miller Jeffrey , Moorman Crystal , O’Connor Jessica , O’Donoghue Aileen , Papastergis Emmanouil , Troischt Parker , Stark David , Xiao Li
Published: July 2018

We present the catalog of ∼31,500 extragalactic H i line sources detected by the completed Arecibo Legacy Fast ALFA (ALFALFA) survey out to z < 0.06, including both high signal-to-noise ratio (>6.5) detections and ones of lower quality that coincide in both position and recessional velocity with galaxies of known redshift. We review the observing technique, data reduction pipeline, and catalog construction process, focusing on details of particular relevance to understanding the catalog’s compiled parameters. We further describe and make available the digital H i line spectra associated with the cataloged sources. In addition to the extragalactic H i line detections, we report nine confirmed OH megamasers (OHMs) and 10 OHM candidates at 0.16 < z < 0.22 whose OH line signals are redshifted into the ALFALFA frequency band. Because of complexities in data collection and processing associated with the use of a feed-horn array on a complex single-dish antenna in the terrestrial radio frequency interference environment, we also present a list of suggestions and caveats for consideration by users of the ALFALFA extragalactic catalog for future scientific investigations.
The use of biodiversity data in spatial planning and impact assessment in Europe
Authors: Underwood Evelyn , Taylor Katie , Tucker Graham
Published: July 2018

This review identifies successful approaches to collating and using biodiversity data in spatial planning and impact assessment, the barriers to obtaining and using existing data sources, and the key data gaps that hinder effective implementation. The analysis is a contribution to the EU BON project funded by the European Commission FP7 research programme, which aimed to identify and pilot new approaches to overcome gaps in biodiversity data in conservation policy at European and national levels.

The consideration of biodiversity in impact assessments and spatial planning requires spatially explicit biodiversity data of various types. Where spatial plans take account of biodiversity, there are opportunities through Strategic Environmental Assessment (SEA) of development plans and Environmental Impact Assessment (EIA) of individual development proposals to ensure that consented activities are consistent with no net loss of biodiversity or even a net gain, and help to maintain or develop coherent ecological networks. However, biodiversity components of SEAs and EIAs have often been found to be of insufficient quality due to the lack of data or the inadequate use of existing data.

Key obstacles to providing access to biodiversity data include the need for data standardisation and data quality governance and systems, licensing approaches to increase data access, and lack of resources to target gaps in data coverage and to develop and advertise policy-relevant data products. Existing data platforms differ in the degree to which they successfully provide a service to spatial planners and impact assessment practitioners. Some local governments, for example Somerset County Council in the UK and the Bremen federal state in Germany, have invested in integrated data collection and management systems that now provide intensively used tools for spatial planning and impact assessment informed by local data collection and monitoring.

The EU BON biodiversity data portal aims to provide a platform that is an access point to datasets relevant to essential biodiversity variables on species, habitats and ecosystems. The EU BON taxonomic backbone provides an integrated search function for species and taxa according to different classifications, and also provides a range of tools for data analysis and decision-support. This will increase the accessibility of the vast range of biodiversity data available in different sources and allow the targeting of future data collection to address current gaps.
Déplacements domicile-travail : état des lieux et perspectives d’action pour les entreprises
Authors: Ermans Thomas , Brandeleer Céline , Hubert Michel , Lebrun Kevin , Sieux Florentine
Published: July 2018

Les déplacements domicile-travail structurent le quotidien des nombreux travailleurs actifs en Belgique. Comment s’organise cette mobilité et quels sont les facteurs qui participent au choix modal des travailleurs ? Quels sont les leviers qui permettent d’influer sur ce choix et quel est, en particulier, le rôle de l’entreprise en la matière ? L’objectif de cette note de synthèse est de faire un état des lieux actualisé de ces questions complexes et s’articule en trois parties : le contexte de ces déplacements, les évolutions des comportements de mobilité et leurs déterminants, ainsi que les leviers d’actions pour évoluer vers une mobilité plus durable. Cette note est également l’occasion de montrer que les déplacements domicile-travail ne se résument pas uniquement à une question de transport, mais sont aussi fonction des parcours résidentiels des personnes et de l’aménagement du territoire. Ce dernier pâtit du morcellement institutionnel belge, appelant à davantage de cohérences et de concertations entre acteurs. Malgré ce contexte, la marge de manœuvre des entreprises est loin d’être négligeable, ce que cette note illustre à travers trois domaines d’action : l’organisation du travail, la gestion de la mobilité des travailleurs et l’accessibilité.
La construcción de un centro cultural desde la periferia: Juan Filloy y el Museo de Bellas Artes de Río Cuarto
Authors: Guevara Martina
Published: July 2018

El artículo tiene como objetivo primordial realizar un análisis crítico de los procesos de formación e inicial desarrollo del Museo Municipal de Bellas Artes de Río Cuarto (Córdoba) entre 1933-1943. Surgido en el contexto de un creciente interés del Estado en la formación del patrimonio nacional, el Museo Municipal de Bellas Artes de Río Cuarto se conformará por el contrario y fundamentalmente por los esfuerzos promovidos por su director: el escritor cordobés, Juan Filloy. De esta manera, constituye un foco central del artículo explorar la red de relaciones e intereses que hicieron posible la gestación del Museo así como la dinámica específica de los campos culturales periféricos. En este marco, se inscribe al Museo Municipal de Bellas Artes de Río Cuarto en una trama más amplia de producción, circulación y apropiación de relatos y representaciones del pasado. La investigación se sustenta principalmente en el examen de fuentes primarias: el libro de Actas del Museo Municipal de Bellas Artes de Río Cuarto, que aún se conserva en su sede actual, y una serie de cartas dirigidas a Filloy, que pudimos examinar en el Archivo Histórico Municipal de Río Cuarto. Además cumple un rol relevante en este trabajo la correspondencia de Ricardo Montes i Bradley a Filloy recopilada en El Amigo de Filloy (2014). Finalmente contamos con algunas declaraciones o discursos del propio Filloy extraídas de la biografía sobre el escritor cordobés recientemente escrita por Ariel Magnus (2017).
Lightweight Aggregate Concrete as an Alternative for Dense Concrete in Post-Tensioned Concrete Slab
Authors: Mieszczak Małgorzata , Domagała Lucyna
Published: July 2018

The paper presents the results of tests conducted on two lightweight aggregate concretes made of new national Certyd artificial aggregate. This research is intended to first application of lightweight concrete to construct large-span post-tensioned slab. In addition to mechanical properties development, shrinkage and creep during 3 months of loading were tested. The obtained results are compared with theoretical results predicted by standard. Conducted tests indicated, that measured values of shrinkage and creep are significantly lower than predicted ones. This is promise for application of tested concrete in construction of post-tensioned slabs.
Parylene-Coated Cellulose Nanofiber Films with Improved Oxygen Barrier and Water Resistance
Authors: Oh Dongyeop X.
Published: July 2018

In this paper, we introduce a parylene-coated cellulose nanofiber film. The parylene coating overcomes the limitations of cellulose nanofiber films used as food packaging films. The disadvantages of cellulose nanofiber films are that they are poor oxygen barriers and have low water resistances. This parylene-coated film achieved a low oxygen transfer rate (OTR) of <5 ml/m2/day because the parylene coating effectively covered the surface pores. In contrast to a pristine cellulose nanofiber film, the parylene-coated film was hydrophobic and exhibited a water contact angle of >75º. Similar to macro-cellulose papers, the pristine cellulose nanofiber film absorbed water and tore easily. The parylene-coated film was not permeable to water. However, the coating did not yield a significant improvement in the mechanical properties or light transmittance. We also investigated the change in surface morphology by the parylene coating. The parylene-coated film has great potential as a food packaging film owing to its improved oxygen barrier and water resistance characteristics.
Investigation on the Strong Light-Matter Interaction in the Graphene-Perovskite Heterostructure Photodetector
Authors: Yuan Qi , Yu Wen Zhi , Yuan Jian , Wang Yu Sheng , Li Xiao Feng , Li Shao Juan
Published: July 2018

Two-dimensional perovskite materials have received wide interests due to their highly impressive optoelectronic properties. The combination of single crystalline perovskite as thin as several unit cells with graphene has not been demonstrated, which may have some outstanding performance for its high crystallinity and less defects. Here, high-quality 2D perovskite crystals as thin as several unit cells are synthesized and a broadband photodetector with a high on/off ratio of 4.28×103 is demonstrated. Based on this, we further fabricated a novel hybrid photodetector by growing single crystalline 2D CH3NH3PbI3 perovskite directly onto the graphene channel, and the resulting device shows an impressive photoresponsivity of 61.2 A/W that is six orders of magnitude over pristine perovskite photodetector. Also, a much faster response time of 130 ms is observed, which takes only one-tenth the response time of pristine perovskite photodetector. These results show that 2D graphene-perovskite heterostructure can be a promising candidate for highly efficient and low-cost optoelectronic applications.
Impact Behaviour of Hybrid Carbon Fibre Composites Reinforced with Silica Micro- and Functionalized Nanoparticles
Authors: dos Santos Júlio Cesar , Vieira Luciano Machado Gomes , Panzera Túlio Hallak , Freire Rodrigo Teixeira Santos , Christoforo André Luis , Scarpa Fabrizio
Published: July 2018

This work investigates the effect of silica nanoparticles functionalized with poly-diallyldimethylammonium chloride (PDDA) and silica microparticle inclusions (1.0 wt% and 3.5 wt%) on the impact resistance of hybrid carbon fibre reinforced composite laminates (HCFRCs) and tensile modulus of particle reinforced polymers (PRPs) via Full-Factorial Design of Experiments. The data were analysed with Analysis of Variance (ANOVA). The inclusion of particles led to reduced impact absorption of HCFRCs, except for composites with 1.0 wt% of silica in microscale, which provides an increase of 11.75% in the impact resistance. Microstructural analysis of fractured impact samples revealed pull-out as the predominant fracture mode in 1.0 wt% silica microparticle composites. Such mechanism leads to impact energy dissipation which may explain the increased impact resistance of these samples.
Wilt diseases of tomato (Lycopersicum esculentum) and chilli (Capsium annum) and their management strategies: Emphasis on the strategies employed in Sri Lanka: A review
Authors: Sandani H. B. P. , Weerahewa H. L. D.
Published: July 2018

Wilt is one of the major diseases causing economic losses in many crops. It is caused by infections of many bacterial (Ralstonia solanacearum), fungal (Fusarium spp., Vertcillium spp., Rhizoctonia spp., Sclerotium spp.), oomycete (Pythium spp., Phytophthora spp.) and viral (Tomato spotted wilt virus) pathogens. This review provides an overview on the control strategies used in other countries for the wilt disease in highly susceptible vegetable/fruit crops; tomato and chilli and make comparisons with Sri Lanka.Many studies have been performed on the prevalence, severity, pathogenicity and the control of these infections in both crops worldwide. Wilt in tomato is caused mainly by Ralstonia solanacearum and Fusarium oxysporum and in chilli mainly by Fusarium oxysporum. Tomato bacterial wilt is successfully managed through usage of resistant cultivars, grafting, biological control agents, inducing host systemic resistance and integrated management. Tomato and chilli wilt caused by Fusarium sp. have been successfully controlled mainly through the application of chemicals and biological approaches such as systemic defense induction and the use of microbial antagonists.In Sri Lanka, tomato wilt is reported as being the result of bacterial, fungal and viral infections which have been mainly controlled by the usage of resistant cultivars, physical measures and cultural practices. Chilli wilt in Sri Lanka has not been thoroughly studied yet. But application of fungicides has been an effective strategy for fungal wilts. Wilt threat of tomato and chilli in Sri Lanka has to be further studied for the proper management of these infections and for freeing tomato and chilli cultivations from the wilt disease.
A case of lipomembranous panniculitis with a dramatic response to the treatment of venous insufficiency
Authors: Mullaaziz Didem , Kaptanoğlu Aslı , Çalıkoğlu Emel Erdal , Özkayalar Hanife
Published: July 2018

Lipomembranous panniculitis (LP) is a peculiar type of fat necrosis and is reported with various clinical conditions, mostly with peripheral vascular diseases. Here, a case of a 57-year-old woman with a painful erythematous swelling of the right leg in association with venous insufficiency has been reported. Although LP is frequently associated with venous insufficiency, to the best of our knowledge, this is the first report on the beneficial effect of venous insufficiency treatment in LP.
Hidradenitis suppurativa in a patient with hyperandrogenism, insulin-resistance and acanthosis nigricans (HAIR-AN syndrome)
Authors: Melibary Yaser Taha
Published: July 2018

The author reports a rare presentation of hidradenitis supprutiva (HS) in combination with hyperandrogenism, insulin-resistance and acanthosis nigricans (HAIR-AN syndrome) in a female patient. Recently many clues have improved the understanding of HS as a systemic disease rather as a disease only with dermatological manifestation. This report might give another hint emphasizing the endocrinological and hormonal role in HS.
Identification of mathematical model and parameter estimation of erythromycin migration in two different porous media, based on column tests
Authors: Okonska Monika , Pietrewicz Katarzyna
Published: July 2018

The amount of pharmaceuticals found in groundwater has risen over the last few years. Erythromycin is an example of an antibiotic widely used in human health care and veterinary practice that can be transported into the subsurface. The aim of the presented research was to 1) determine the mathematical model of erythromycin migration in two different porous media, 2) estimate the model parameters and 3) compare the migration of the antibiotic in the investigated media. The research was conducted in a specially prepared laboratory stand where column tests were performed. One column was filled with glass granules (70% SiO2, 600–800 μm in diameter) and the second column was filled with a natural sediment (sandur sand). The migration of a conservative tracer and erythromycin was examined in both columns. The experiments were performed in two separate steps. In the first step, a conservative tracer, subject to advection and dispersion processes, was injected into the column and its transport was investigated. The second step involved investigating the migration of erythromycin. A conductivity meter was installed at the output of the column in order to determine tracer concentrations based on calibration curves. Short-time pulse injections and continuous injection were applied during the experiments. An interpretation of the experiments results was conducted in the MATLAB environment. A mathematical model of erythromycin migration was determined from the shape of pulse breakthrough curves, which were characterized by a set of descriptors: the time of maximum tracer concentration at the output tmax, the spread of the breakthrough curve s, and relative tracer recovery e. This procedure involved implementing an identification algorithm developed by the authors. It was proved that the migration of erythromycin is best described by a hybrid model that assumes the coexistence of equilibrium and non-equilibrium sorption. In the next stage of the research, the transport and sorption parameters were estimated through numerical optimization procedures. The convergence between theoretical and experimental breakthrough curves was analysed qualitatively by calculating the root mean square error RMSE and correlation coefficient r.
The perception of heritage values and their analysis by using GIS tools in vernacular heritage landscapes
Authors: Altaba Tena Pablo
Published: July 2018

The main objective of the study is to assess, independently of the scenic beauty, the importance and composition of the different attributes within a given landscape. For this purpose, the study focuses on Penyagolosa where we have selected three areas of evaluation to determine the importance of distance in the determination of heritage values of the landscape. Using Geographic Information Systems (GIS) determines what values are detectable on the basis of the terms of proximity and remoteness and how they are applied in three cases of assessment. Thus, 5 criteria have been set to analyze these values: 1. the overview of the landscape, 2. dominance or intensity of elements, 3. the aesthetic composition of space, 4. The selective interpretation of the visual and 5 variables. The fragility or alterations induced in the landscape. Ultimately, criteria are discussed from dynamic and static fields of the authenticity and integrity of the landscape and they affect how they neglect.
Revised Self-Report Assessment of Functional Visual Performance (R–SRAFVP)—Part II: Construct Validation
Authors: Snow Marlene , Warren Mary , Yuen Hon K.
Published: July 2018

OBJECTIVE. Our objective was to validate the construct of the Revised Self-Report Assessment of Functional Visual Performance (R–SRAFVP) for older adults with low vision resulting from age-related eye disease.

METHOD. The 50-item draft of the R–SRAFVP was administered to 87 older adults with low vision. Construct validation included principal-components analysis and the known-groups method.

RESULTS. Principal-components analysis revealed nine components (comprising 33 items): Personal Care, Oral Care, Meal/Laundry Preparation, Financial Management, Telephone Usage, Personal Preference Activities, Reading, Writing, and Functional Mobility. Cronbach’s α ranged from .72 to .84 for individual components and was .92 overall. Known-groups comparisons showed that participants with moderate to profound acuity loss or contrast sensitivity deficits reported significantly greater difficulty completing tasks on the R–SRAFVP than those with milder acuity loss or normal contrast sensitivity.

CONCLUSION. The 33-item R–SRAFVP demonstrates adequate evidence of reliability and validity to evaluate the ability of older adults with low vision to complete vision-dependent activities of daily living.
Ideas and perspectives: Tree-atmosphere interaction responds to water-related stem variations
Authors: van Emmerik Tim , Steele-Dunne Susan , Gentine Pierre , Oliveira Rafael S. , Bittencourt Paulo , Barros Fernanda , van de Giesen Nick
Published: July 2018

Abstract. Land-atmosphere interactions depend on momentum transfer from the atmosphere to the canopy, which in turn depends on the tree drag coefficient. It is known that the drag coefficient, and thus tree-atmosphere momentum transfer, can vary strongly within a canopy. Yet, only few measurements are available to study the variation of tree-atmosphere momentum transfer in time and space, and in response to tree water deficit. In this paper we use accelerometers to estimate tree-atmosphere momentum transfer for 19 individual trees of seven different species in the Brazilian Amazon. The five-month measurement period included the transition from wet to dry months. Here, we demonstrate that under field conditions, tree-atmosphere momentum transfer can vary considerably in time and space. Increased water-related stem variations during the dry months is related to observed changes in tree-atmosphere momentum transfer, which is hypothesized to be caused by tree water deficit induced changes in tree mass.
Precise DEM extraction from oblique imagery of Svalbard in 1936
Authors: Girod Luc , Nielsen Niels Ivar , Couderette Frédérique , Nuth Christopher , Kääb Andreas
Published: July 2018

Abstract. Stretching time series further in the past with the best possible accuracy is essential to the understanding of climate change impacts and geomorphological processes evolving on decadal-scale time spans. In the first half of the twentieth century, large part of the polar regions was still un-mapped or only superficially so. To create cartographic data, a number of historic photogrammetric campaigns were conducted using oblique imagery, easier to work with in un-mapped environments as collocating images is an easier task for the human eye given a more familiar viewing angle and a larger field of view. Even if the data obtained from such campaigns gave a good baseline for the cartography of the area, the precision and accuracy of it is to be considered with caution. Exploiting the possibilities arising from modern image processing tools and re-processing the archives to obtain better data is therefore a task worth the effort. The oblique angle of view of the data is offering a challenge to classical photogrammetric tools, but the use of modern Structure-from-Motion (SfM) photogrammetry offers an efficient and quantitative way to process this data into terrain models. In this paper, we propose a good practice method for processing historical oblique imagery using open source free software and illustrate the process using images of the Svalbard archipelago acquired in 1936 by the Norwegian Polar Institute. We create 5m-resolution DEMs and orthoimages and compare them to modern data.
Sensitivity and identifiability of hydraulic and geophysical parameters from streaming potential signals in unsaturated porous media
Authors: Younes Anis , Zaouali Jabran , Lehmann François , Fahs Marwan
Published: July 2018

Abstract. Fluid flow in a charged porous medium generates electric potentials called
streaming potential (SP). The SP signal is related to both hydraulic and
electrical properties of the soil. In this work, global sensitivity analysis
(GSA) and parameter estimation procedures are performed to assess the
influence of hydraulic and geophysical parameters on the SP signals and to
investigate the identifiability of these parameters from SP measurements.
Both procedures are applied to a synthetic column experiment involving a
falling head infiltration phase followed by a drainage phase. GSA is used through variance-based sensitivity indices, calculated using
sparse polynomial chaos expansion (PCE). To allow high PCE orders, we use an
efficient sparse PCE algorithm which selects the best sparse PCE from a
given data set using the Kashyap information criterion (KIC). Parameter
identifiability is performed using two approaches: the Bayesian approach
based on the Markov chain Monte Carlo (MCMC) method and the first-order
approximation (FOA) approach based on the Levenberg–Marquardt algorithm. The
comparison between both approaches allows us to check whether FOA can
provide a reliable estimation of parameters and associated uncertainties for
the highly nonlinear hydrogeophysical problem investigated. GSA results show that in short time periods, the saturated hydraulic conductivity
(Ks) and the voltage coupling coefficient at saturation (Csat) are the most influential parameters, whereas in long time periods, the
residual water content (θs), the Mualem–van Genuchten parameter
(n) and the Archie saturation exponent (na)
become influential, with strong interactions between them. The
Mualem–van Genuchten parameter (α) has a very weak
influence on the SP signals during the whole experiment. Results of parameter estimation show that although the studied problem is
highly nonlinear, when several SP data collected at different altitudes
inside the column are used to calibrate the model, all hydraulic (Ks,θs,α,n)
and geophysical parameters (na,Csat) can be reasonably estimated from the SP measurements. Further, in
this case, the FOA approach provides accurate estimations of both mean
parameter values and uncertainty regions. Conversely, when the number of SP
measurements used for the calibration is strongly reduced, the FOA approach
yields accurate mean parameter values (in agreement with MCMC results) but
inaccurate and even unphysical confidence intervals for parameters with
large uncertainty regions.
Interannual snow accumulation variability on glaciers derived from repeat, spatially extensive ground-penetrating radar surveys
Authors: McGrath Daniel , Sass Louis , O'Neel Shad , McNeil Chris , Candela Salvatore G. , Baker Emily H. , Marshall Hans-Peter
Published: July 2018

Abstract. There is significant uncertainty regarding the spatiotemporal distribution of seasonal snow on glaciers, despite being a fundamental component of glacier mass balance. To address this knowledge gap, we collected repeat, spatially extensive high-frequency ground-penetrating radar (GPR) observations on two glaciers in Alaska for five consecutive years. GPR measurements showed steep snow water equivalent (SWE) elevation gradients at both sites; continental Gulkana Glacier’s SWE gradient averaged 115 mm 100 m−1 and maritime Wolverine Glacier’s gradient averaged 440 mm 100 m−1 (over >1000 m). We extrapolated GPR point observations across the glacier surface using terrain parameters derived from digital elevation models as predictor variables in two statistical models (stepwise multivariable linear regression and regression trees). Elevation and proxies for wind redistribution had the greatest explanatory power, and exhibited relatively time-constant coefficients over the study period. Both statistical models yielded comparable estimates of glacier-wide average SWE (1 % average difference at Gulkana, 4 % average difference at Wolverine), although the spatial distributions produced by the models diverged in unsampled regions of the glacier, particularly at Wolverine. In total, six different methods for estimating the glacier-wide average agreed within ±11 %. We assessed interannual variability in the spatial pattern of snow accumulation predicted by the statistical models using two quantitative metrics. Both glaciers exhibited a high degree of temporal stability, with ~ 85 % of the glacier area experiencing less than 25 % normalized absolute variability over this five-year interval. We found SWE at a sparse network (3 stakes per glacier) of long-term glaciological stake sites to be highly correlated with the GPR-derived glacier-wide average. We estimate that interannual variability in the spatial pattern of SWE is only a small component (4–10 % of glacier-wide average) of the total mass balance uncertainty and thus, our findings support the concept that sparse stake networks effectively measure interannual variability in winter balance on glaciers, rather than some spatially varying pattern of snow accumulation.
Accessibility of published research to practicing veterinarians
Authors: Page Jessica R.
Published: July 2018

Objectives: This study established the percentage of veterinary research articles that are freely available online, availability differences inside and outside of core veterinary medicine publications, sources and trends in article availability over time, and author archiving policies of veterinary journals. This research is particularly important for unaffiliated practitioners who lack broad subscription access and the librarians who assist them.Methods: Web of Science citation data were collected for articles published from 2000–2014 by authors from twenty-eight accredited US colleges of veterinary medicine. A sample of these articles was searched by title in Google Scholar to determine which were freely available online and their sources. Journals represented in this dataset and a basic list of veterinary serials were cross-referenced with the Sherpa/RoMEO database to determine author archiving policies and the percentage of articles that could potentially be made freely available.Results: Over half (62%) of the sample articles were freely available online, most of which (57%) were available from publishers’ websites. Articles published more recently were more likely to be freely available. More articles were found to be available in 2017 (62%) than in 2015 (57%). Most (62%) of the included journals had policies allowing authors to archive copies of their articles.Conclusions: Many articles are freely available online, but opportunity exists to archive additional articles while complying with existing copyright agreements. Articles in veterinary medicine–specific journals are less likely to be freely available than those in interdisciplinary journals. Requirements for federally funded research have likely influenced article availability and may continue to do so.
Promoting MedlinePlus utilization in a federally qualified health center using a multimodal approach
Authors: Sanders Mechelle , Bringley Kate , Thomas Marie , Boyd Michele , Farah Subrina , Fiscella Kevin
Published: July 2018

Background: Most patients want more health information than their clinicians provide during office visits. Written information can complement information that is provided verbally, yet most primary care practices, including federally qualified health centers, have not implemented systematic programs to ensure that patients receive understandable, relevant, and accurate health information at the point of care. MedlinePlus in particular is underutilized.Case Presentation: The authors conducted a multimodal intervention to promote the use of MedlinePlus at a federally qualified health center. We provided MedlinePlus training to clinicians and patients through group and one-on-one trainings and multimedia promotion. We administered pre- and post-intervention surveys to patients, clinicians, and nurses to assess changes in the use and recognition of MedlinePlus at the point of care. We used quantitative and qualitative data to understand the impact of the intervention. A National Library of Medicine grant provided resources that supported equipment and staff. Group training improved use of MedlinePlus by clinicians and staff. One-on-one training was most effective for patients, particularly when it was integrated into the work-flow.Conclusions: A multimodal approach can promote use of MedlinePlus among community health center patients. However, the process is labor- and resource-intensive and requires careful attention to work flow and leveraging of brief opportunities.