43 research outputs found
Ammonite stratigraphy of a Toarcian (Lower Jurassic) section on Nagy-Pisznice Hill (Gerecse Mts, Hungary)
Abstract
In the Jurassic rocks exposed in a small abandoned quarry on the northwestern edge of Nagy-Pisznice Hill in the Gerecse Mts, fairly well preserved parts of a crocodile skeleton was found in 1996. The bed which yielded the skeletal remains is the uppermost layer of the Kisgerecse Marl Formation exposed here and was determined as belonging to the Upper Toarcian Grammoceras thouarsense Zone. The beds of the sequence above and below were carefully sampled in the late 1990s, and the encountered ammonites were evaluated biostratigraphically. As a result, the Lower Toarcian Harpoceras serpentinum Zone, the Middle Toarcian Hildoceras bifrons and Merlaites gradatus Zones, and the Upper Toarcian Grammoceras thouarsense and Geczyceras speciosum Zones were identified. Within most of these zones the subzones and even the faunal horizons were successfully recognized. The lowermost beds above the underlying Pliensbachian red limestone did not yield any fossils; thus the lowermost Toarcian Dactylioceras tenuicostatum Zone could not be documented. The highest Toarcian ammonite zones also remained unidentified, because the beds of the Tölgyhát Limestone above were not sampled all the way up. This paper presents the lithostratigraphic and biostratigraphic details of the sequence, and the paleontological descriptions of the most important ammonites
Site specific radon regimes of a cave system
The spatial and temporal variation of air-borne 222Rn concentration was continuously measured during 1990-94 with monthly changed etched track detectors in the Pál-völgy and Mátyás-hegy caves, Budapest, Hungary in order to identify site-specific behaviour of radon variations. We found winter minimum and summer maximum levels at each measuring site. In the Pál-völgy cave these end values increased with the distance from the entrance. The maximum-to-minimum
ratio, however, showed a broad peak between the entrance and deep cave region. This behaviour can be attributed to the seasonal and depth dependence pattern of the advective dilution effect caused by intrusion of outside radon free air. Far from the entrance radon concentration goes to a saturation value, which approaches the level found in a highly unventilated remote cavity of the cave. In the Mátyás-hegy cave the maximum-to-minimum ratios were small and nearly constant, indicating that the measuring sites belong to deeper parts of the system. The higher maximum
values, on the other hand, are attributed to smaller passage sizes of this part. High similarity was found in the temporal variation of radon concentration in the
neighbouring parts of the two caves, which reinforced the assumed but by man unpenetrable connection between them
Tmetoceratidae (Ammonitina) fauna from the Gerecse Mts (Hungary)
Abstract
Taxonomic and stratigraphic problems of the family Tmetoceratidae and the genera Dumortieria, Catulloceras, Cotteswoldia, Pleydellia and Tmetoceras included in it are briefly discussed. Fifteen species of Tmetoceratidae are described and illustrated from the Upper Toarcian-Aalenian ammonite assemblages of the Gerecse Mts (NE Transdanubian Range, Hungary). The fauna described here is closely allied to the Mediterranean Province of the Mediterranean-Caucasian Realm
A framework for intelligent policy decision making based on a government data hub
Author ProofThe e-Oman Integration Platform is a data hub that enables data
exchanges across government in response to transactions. With millions of
transactions weekly, and thereby data exchanges, we propose to investigate the
potential of gathering intelligence from these linked sources to help government
officials make more informed decisions. A key feature of this data is the richness
and accuracy, which increases the value of the learning outcome when augmented
by other big and open data sources. We consider a high-level framework
within a government context, taking into account issues related to the definition
of public policies, data privacy, and the potential benefits to society. A preliminary,
qualitative validation of the framework in the context of e-Oman is
presented. This paper lays out foundational work into an ongoing research to
implement government decision-making based on big data.“SmartEGOV: Harnessing EGOV for Smart Governance (Foundations, Methods, Tools)/NORTE-01-0145-FEDER-000037”, supported by Norte Portugal Regional Operational Programme (NORTE 2020), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund (EFDR
Crowdcloud: A Crowdsourced System for Cloud Infrastructure
The widespread adoption of truly portable,
smart devices and Do-It-Yourself computing platforms
by the general public has enabled the rise of new network
and system paradigms. This abundance of wellconnected,
well-equipped, affordable devices, when combined
with crowdsourcing methods, enables the development
of systems with the aid of the crowd. In this
work, we introduce the paradigm of Crowdsourced Systems,
systems whose constituent infrastructure, or a significant
part of it, is pooled from the general public by
following crowdsourcing methodologies. We discuss the
particular distinctive characteristics they carry and also
provide their “canonical” architecture. We exemplify
the paradigm by also introducing Crowdcloud, a crowdsourced
cloud infrastructure where crowd members can
act both as cloud service providers and cloud service
clients. We discuss its characteristic properties and also
provide its functional architecture. The concepts introduced
in this work underpin recent advances in the areas
of mobile edge/fog computing and co-designed/cocreated
systems