Search results for "torium"
showing 10 items of 108 documents
Implementasi Pembelajaran Fisika Berbasis Laboratorium Virtual terhadap Keterampilan Proses Sains dan Persepsi Mahasiswa
2018
Penelitian ini bertujuan untuk mengetahui penerapan pembelajaran fisika berbasis media laboratorium virtual , Keterampilan Proses Sains (KPS), dan persepsi mahasiswa pada mata kuliah fisika dasar. Metode penelitian menggunakan pre-eksperimental design dan teknik purposive sample digunakan untuk memilih sampel yaitu kelas pendidikan fisika dan pendidikan matematika Universitas Papua. Instrumen dalam penelitian ini yaitu lembar observasi dan penilaian KPS serta angket persepsi mahasiswa yang dinilai di akhir pembelajaran. Hasil penelitian menunjukkan persentase KPS yang diobservasi selama perkuliahan 86,4% ± SD 12,7 meliputi aspek keterampilan menggunakan alat, mengambil data, dan mengkomunik…
Multi-temporal and Multi-source Remote Sensing Image Classification by Nonlinear Relative Normalization
2016
Remote sensing image classification exploiting multiple sensors is a very challenging problem: data from different modalities are affected by spectral distortions and mis-alignments of all kinds, and this hampers re-using models built for one image to be used successfully in other scenes. In order to adapt and transfer models across image acquisitions, one must be able to cope with datasets that are not co-registered, acquired under different illumination and atmospheric conditions, by different sensors, and with scarce ground references. Traditionally, methods based on histogram matching have been used. However, they fail when densities have very different shapes or when there is no corres…
Shifts in microbial diversity through land use intensity as drivers of carbon mineralization in soil
2015
10 pages; International audience; Land use practices alter the biomass and structure of soil microbial communities. However, the impact of land management intensity on soil microbial diversity (i.e. richness and evenness) and consequences for functioning is still poorly understood. Here, we addressed this question by coupling molecular characterization of microbial diversity with measurements of carbon (C) mineralization in soils obtained from three locations across Europe, each representing a gradient of land management intensity under different soil and environmental conditions. Bacterial and fungal diversity were characterized by high throughput sequencing of ribosomal genes. Carbon cycl…
The effect of alternating different water qualities on accumulation and leaching of solutes in a Mediterranean cracking soil
2002
The relevance of bypass flow on water flow, solute or pesticide transport is becoming increasingly recognized. Recent investigations proved that soil salinization may be influenced by bypass flow, i.e. the rapid transport of water and solutes via macropores and/or shrinkage cracks to subsoil and groundwater. This paper explores the role of bypass flow in the process of accumulation and leaching of solutes, as well as of sodium, in a Mediterranean cracking soil irrigated with saline/sodic waters. The results of bypass flow experiments performed on undisturbed soil cores showed that leaching of solutes occurred in concomitance with bypass fluxes when a low salinity solution was alternated wit…
Przestrzenne ograniczenie teatru wojny w kontekście praw i obowiązków państw neutralnych
2018
Współcześnie, tradycyjnie rozumiana kategoria państwa neutralnego uległa zmianie. Spowodowane jest to przede wszystkim ewolucją nietykalności terytorium państwa. Obecnie, tradycyjnie rozumiana nietykalność terytorialna państwa, wobec współczesnych, technicznych możliwości prowadzenia wojny musi, w sensie regulacji prawnomiędzynarodowych, ulec zmianie. Należy jednoznacznie stwierdzić, że dotychczasowa neutralność państwa jest li tylko kategorią historyczną
Forme in scena
2010
L’architettura delle sale teatrali stabilisce una filiera naturale con lo spazio scenico, i tipi teatrali e la loro messa in scena non solo come successione materiale dello spazio e nel tempo ma soprattutto come relazione interna ai contenuti e ai modi esecutivi che ognuna di queste entità sviluppa in sequenza con le altre. Si viene così a creare un rapporto continuo di “progressive accoglienze” tra un sistema ospitante e il suo contenuto,tanto che ogni entità porta il rapporto forma-funzione a predisporre e determinare l’oggetto che ospita più che a palesare la sola rappresentazione di se stesso. Il volume affronta lo studio di tale consequenzialità attraverso le riflessioni e le esperienz…
LOCAL ADAPTATION, RESISTANCE, AND VIRULENCE IN A HEMIPARASITIC PLANT-HOST PLANT INTERACTION
2000
Coevolution may lead to local adaptation of parasites to their sympatric hosts. Locally adapted parasites are, on average, more infectious to sympatric hosts than to allopatric hosts of the same species or their fitness on the sympatric hosts is superior to that on allopatric hosts. We tested local adaptation of a hemiparasitic plant, Rhinanthus serotinus (Scrophulariaceae), to its host plant, the grass Agrostis capillaris. Using a reciprocal cross-infection experiment, we exposed host plants from four sites to hemiparasites originating from the same four sites in a common environment. The parasites were equally able to establish haustorial connections to sympatric and allopatric hosts, and…
The significance of soils and soil science towards realization of the United Nations Sustainable Development Goals
2016
Abstract. In this forum paper we discuss how soil scientists can help to reach the recently adopted UN Sustainable Development Goals (SDGs) in the most effective manner. Soil science, as a land-related discipline, has important links to several of the SDGs, which are demonstrated through the functions of soils and the ecosystem services that are linked to those functions (see graphical abstract in the Supplement). We explore and discuss how soil scientists can rise to the challenge both internally, in terms of our procedures and practices, and externally, in terms of our relations with colleague scientists in other disciplines, diverse groups of stakeholders and the policy arena. To meet th…
Assessing impacts of soil management measures on ecosystem services
2018
Only a few studies have quantified and measured ecosystem services (ES) specifically related to soil. To address this gap, we have developed and applied a methodology to assess changes in ecosystem services, based on measured or estimated soil property changes that were stimulated by soil management measures (e.g., mulching, terracing, no-till). We applied the ES assessment methodology in 16 case study sites across Europe representing a high diversity of soil threats and land use systems. Various prevention and remediation measures were trialled, and the changes in manageable soil and other natural capital properties were measured and quantified. An Excel tool facilitated data collection, c…
Broomrape weeds. Underground mechanisms of parasitism and associated strategies for their control: a review
2016
prod 2018-285d SPE GESTAD Agrosup INRA CT?; International audience; Broomrapes are plant-parasitic weeds which constitute one of the most difficult-to-control of all biotic constraints that affect crops in Mediterranean, central and eastern Europe, and Asia. Due to their physical and metabolic overlap with the crop, their underground parasitism, their achlorophyllous nature, and hardly destructible seed bank, broomrape weeds are usually not controlled by management strategies designed for non-parasitic weeds. Instead, broomrape are in a current state of intensification and spread due to lack of broomrape-specific control programs, unconscious introduction to new areas and may be decline of …