DORIS: Discovering Ontological Relations In Services

We propose to demonstrate DORIS, a system that maps the schema of a Web Service automatically to the schema of a knowledge base. Given only the input type and the URL of the Web Service, DORIS executes a few probing calls, and deduces an intensional description of the Web service. In addition, she computes an XSLT transformation function that can transform a Web Service call result in XML to RDF facts in the target schema. Users will be able to play with DORIS, and to see how real-world Web Services can be mapped to large knowledge bases of the Semantic Web

UPTAKE OF MICROELEMENTSINOILSEED RAPE PLANTS UNDER MINERAL FERTILIZATION WITH NITROGEN AND PHOSPHORUS

With a large and growing demand in the market, rapeseed (Brassica napus subsp. napus.) is a crop with relatively high requirements for macronutrient fertilization. The aim of the experiment was to study the effect of mineral fertilization with different doses of nitrogen and phosphorus on the accumulation of microelements in the vegetative organs and grains of oilseed rape plants.The experiment was carried out in the long-term experimental fields of SCDA Livada. There were taken and analyzed 96 plant samples and the results were statistically processed. Fertilization with nitrogen and phosphorus led to statistically assured changes in the contents of microelements, mostly in the aerial parts of the rapeseed. Regarding their accumulation in the grain, there were obtained variations of contents that were not significant to all doses of fertilizer applied. The conclusions of the experiments showed that the evaluation of contents of manganese, iron, zinc, and copper in rapeseed plants can help in choosing the optimal dose of mineral fertilizers in order to assure balanced microelement composition in plants and thus, consequently to avoid their deficiency

Laser Prepared Thin Films for Optoelectronic Applications

Laser techniques such as pulsed laser deposition, combinatorial pulsed laser deposition, and matrix-assisted pulsed laser evaporation were used to deposit thin films for optoelectronic applications. High-quality transparent conductor oxide films ITO, AZO, and IZO were deposited on polyethylene terephthalate by PLD, an important experimental parameter being the target-substrate distance. The TCO films present a high transparency (>95%) and a reduced electrical resistivity (5 × 10−4 Ωcm) characteristics very useful for their integration in the flexible electronics. InxZn1−xO films with a compositional library were obtained by CPLD. These films are featured by a high optical transmission (>95%), the lowest resistivity (8.6 × 10−4 Ωcm) being observed for an indium content of about 44–49 at.%. Organic heterostructures based on arylenevinylene oligomers (P78 and P13) or arylene polymers (AMC16 and AMC22) were obtained by MAPLE. In the case of ITO/P78/Alq3/Al heterostructures, a higher current value is obtained when the film thickness increases. Also, a photovoltaic effect was observed for heterostructures based on AMC16 or AMC22 deposited on ITO covered by a thin layer of PEDOT:PSS. Due to their optical and electrical properties, such organic heterostructures can be interesting for the organic photovoltaic cells (OPV) applications

Heterostructures Based on Porphyrin/Phthalocyanine Thin Films for Organic Device Applications

Multilayer or blend heterostructures based on porphyrins and phthalocyanines were obtained on different substrates using VTE and MAPLE methods. Stacked structures based on ZnPc and C60 with NTCDA were prepared by VTE on ITO/glass, their current value being increased by the deposition of the materials in an inverted configuration or by using ITO/PEDOT:PSS as a substrate. Multilayer structures comprising ZnPc and NTCDA were fabricated by MAPLE on an AZO/glass. Treating the AZO in oxygen plasma, a higher current value was obtained for the deposited heterostructures. The oxygen plasma treatment can increase the work function of the AZO resulting in a decrease of the energetic barrier from AZO/organic interface and finally improving the charge transport. Stacked layers or blend heterostructures having ZnPc, MgPc and TPyP were deposited by MAPLE on ITO/PET. In the case of those containing MgPc and TPyP, an increase in the current value (in dark) was obtained for the blend compared to the stacked layer configuration. For those with ZnPc and TPyP, under illumination, a photovoltaic effect was observed for the blend structure. All heterostructures are featured by a large absorption in the visible domain of the solar spectrum and suitable electrical properties for their use in OPV applications

SOFYA: Semantic on-the-fly Relation Alignment

Recent years have seen the rise of Web data, in particular Linked Data, with, up to now, more than 1000 datasets in the Linked Open Data Cloud (LOD). These datasets are mostly of entity-centric nature and are highly heterogeneous in terms of domains, language, schema, etc. Hence, the vision of uniformly querying such resources in the LOD has a long way to go. While equivalent entity instances across datasets are often linked by sameAs links, relations from different datasets and schemas are usually not aligned. In this paper, we propose an on-line instance-based relation alignment approach. The alignment may be performed during query execution and requires partial information from the datasets. We align relations to a target dataset using association rule mining approaches. We sample for equivalent entity instances with two main sampling strategies. Preliminary experiments, show that we are able to align relations with high accuracy, even if accessing the entire datasets is impossible or impractical

ASSESSMENT OF POLYCHLORINATED BIPHENYLS LOAD LEVEL IN SOILS COLLECTED FROM RESIDENTIAL AREAS

Polychlorinated biphenyls (PCBs) are listed as a class of Persistent Organic Pollutants (POPs) under the Stockholm Convention. PCBs represent a threat to human health and environment because of their toxicity, persistence, and tendency to bio-accumulate at the top of the food chain. Additionally, some PCBs are suspected carcinogens. Because of their chemical stability and their excellent electrical insulation and thermal conductive properties, PCBs have been used in widespread industrial, commercial and domestic applications. The aim of this study is to establish the load level of these compounds in soils from residential areas. The soil samples were collected from gardens, parks and households located in Bucharest. The interest compounds (PCB with IUPAC number 28, 52, 101, 118, 138, 153, 180) were extracted from soil with organic solvents (hexane: acetone = 1:1) and analysed by gas chromatography with electron capture detector. The analytical results show that the most abundant compounds were those with a high degree of chlorination. The total content of PCBs ranged between 0.0004 mg/kg and 0.028 mg/kg, so values of concentration that are not exceed the alert threshold (0.25 mg/kg)

Metal Oxide Nanowires as Building Blocks for Optoelectronic Devices

Metal oxide nanowires have become the new building blocks for the next generation optoelectronic devices due to their specific features such as quantum confinement and high aspect ratio. Thus, they can be integrated as active components in diodes, field effect transistors, photodetectors, sensors, solar cells and so on. ZnO, a n-type semiconductor with a direct wide band gap (3.3 eV) and CuO, a p-type semiconductor with a narrow band gap (1.2–1.5 eV), are two metal oxides which were recently in the spotlight of the researchers for applications in the optoelectronic devices area. Therefore, in this chapter we focused on ZnO and CuO nanowires, the metal oxides nanowire arrays being prepared by straightforward wet and dry methods. Further, in order to emphasize their intrinsic transport properties, lithographic and thin films deposition techniques were used to integrate single ZnO and CuO nanowires into diodes and field effect transistors

Polychlorinated biphenyls in Bucharest urban soils

Polychlorinated biphenyls are a family of 209 congeners that were manufactured and sold as complex mixtures differing in their chlorination level. They have excellent dielectric properties, chemical and thermal stability, so they were used extensively in industry. PCBs are very persistent, very toxic, and the high octanol/water partition coefficient results in their accumulation in fatty tissues and their biomagnification in the food chain. These are the reasons of including polychlorinated biphenyls on the Persistent Organic Pollutants list adopted in Stockholm in 2001. This paper presents the PCBs (28, 52, 101, 138, 153, 180) load level of Bucharest soils. The samples were collected from representative areas such as parks, streets, intersections, markets. The interest compounds were extracted from soil with organic solvents and analyzed by gas chromatography with electron capture detector. The analythical results show that the most abundant compounds were those with a high degree of chlorination. Thus, for PCB 180, 90% from analyzed samples have concentrations ranged between normal values (< 0.0004 mg/kg) and alert threshold (0.01 mg/kg), 7% between alert and intervention threshold (0.04 mg/kg), while only 3% exceed the intervention threshold. For PCB 153, again, 90% of the values are within the interval normal range – alert threshold and 10% correspond to the interval alert threshold – intervention threshold. For PCB 138, 23% from soil samples have normal concentration, 70% exceed the normal values but are lower than alert threshold, while 7% exceed the alert threshold. The highest concentration value, 0.0542 mg/kg, was recorded for PCB 180 in a sample collected close by a very busy boulevard