Search results for "Grit"

The Reprocessed Proba-V Collection 2: Product Validation

2021

With the objective to improve data quality in terms of cloud detection, absolute radiometric calibration and atmospheric correction, the PRoject for On-Board Autonomy-Vegetation (PROBA-V) data archive (October 2013 - June 2020) will be reprocessed to Collection 2 (C2). The product validation is organized in three phases and focuses on the intercomparison with PROBA-V Collection 1 (C1), but also consistency analysis with SPOT-VGT, Sentinel-3 SYN-VGT, Terra-MODIS and METOP-AVHRR is foreseen. First preliminary results show the better performance of cloud and snow/ice masking, and indicate that statistical consistency between PROBA-V C2 and C1 are in line with expectations. PROBA-V C2 data are …

Assessment of ecosystem integrity and service gradients across Europe using the LTER Europe network

2015

Better integration of knowledge from ecological, social and economic science is necessary to advance the understanding and modelling of socio-ecological systems. To model ecosystem integrity (EI) and ecosystem services (ES) at the landscape scale, assessment matrices are commonly used. These matrices assign capacities to provide different services to different land cover types. We revised such an existing matrix and examined the regional heterogeneity in EI and ES provision in Europe and searched for spatial gradients in their provision to elucidate their suitability for large-scale EI and ES mapping in Europe. Overall, 28 sites belonging to the Long-Term Ecological Research network in Euro…

Front Cover: Filling the Gap in the Metallacrown Family: The 9‐MC‐3 Chromium Metallacrown (Chem. Eur. J. 13/2021)

2021

The determinants of tourists’ satisfaction in the sicilian agritourism structures: A factor analysis

2019

The effects of cryogenic cooling on surface integrity in hard machining: A comparison with dry machining

2012

The role of cell interactions in the control of RNA synthesis.

1967

Oxidative stress triggers the preferential assembly of base excision repair complexes on open chromatin regions

2010

How DNA repair machineries detect and access, within the context of chromatin, lesions inducing little or no distortion of the DNA structure is a poorly understood process. Removal of oxidized bases is initiated by a DNA glycosylase that recognises and excises the damaged base, initiating the base excision repair (BER) pathway. We show that upon induction of 8-oxoguanine, a mutagenic product of guanine oxidation, the mammalian 8-oxoguanine DNA glycosylase OGG1 is recruited together with other proteins involved in BER to euchromatin regions rich in RNA and RNA polymerase II and completely excluded from heterochromatin. The underlying mechanism does not require direct interaction of the prote…

Nucleotide excision repair of abasic DNA lesions

2019

AbstractApurinic/apyrimidinic (AP) sites are a class of highly mutagenic and toxic DNA lesions arising in the genome from a number of exogenous and endogenous sources. Repair of AP lesions takes place predominantly by the base excision pathway (BER). However, among chemically heterogeneous AP lesions formed in DNA, some are resistant to the endonuclease APE1 and thus refractory to BER. Here, we employed two types of reporter constructs accommodating synthetic APE1-resistant AP lesions to investigate the auxiliary repair mechanisms in human cells. By combined analyses of recovery of the transcription rate and suppression of transcriptional mutagenesis at specifically positioned AP lesions, w…

Spatio-temporal Schema Integration with Validation: A Practical Approach

2005

We propose to enhance a schema integration process with a validation phase employing logic-based data models. In our methodology, we validate the source schemas against the data model; the inter-schema mappings are validated against the semantics of the data model and the syntax of the correspondence language. In this paper, we focus on how to employ a reasoning engine to validate spatio-temporal schemas and describe where the reasoning engine is plugged into our integration methodology. The validation phase distinguishes our integration methodology from other approaches. We shift the emphasis on automation from the a priori discovery to the a posteriori checking of the inter-schema mapping…

Elektroniskās darba laika uzskaites sistēmas integrācijas iespējas ar citām sistēmām

2018

Bakalaura darbā “Elektroniskās darba laika uzskaites sistēmas integrācijas iespējas ar citām sistēmām” tiek aprakstītas integrācijas iespējas, kas reizē arī optimizē elektroniskās uzskaites sistēmu un padara to efektīvāku. Tāpat arī tiek apskatīti identifikācijas risinājumi, kas uzskaita darba laiku un nodrošina piekļuvi dažādu tipa objektos un industrijās. Šī tēma ir īpaši aktuāla, jo mūsdienās šīs sistēmas ir nepieciešamas ikvienam uzņēmējam, kurš grib būt drošs par savu naudas plūsmu jeb darbinieku nostrādātajām stundām, un tai pat laikā piekopt automatizētu un modernu infrastruktūru vidē, kurā uzturas. Ir svarīgi minēt, ka tiek apskatītas integrācijas iespējas, jo cilvēki, kuri ievieš š…