scholarly journals Radiocarbon Dating of Porewater – Correction for Diffusion and Diagenetic Processes

Radiocarbon ◽  
2001 ◽  
Vol 43 (2B) ◽  
pp. 765-771 ◽  
Author(s):  
Orit Sivan ◽  
Barak Herut ◽  
Yoseph Yechieli ◽  
Boaz Lazar
Keyword(s):  
Sulfate Reduction ◽  
Dynamic Range ◽  
Dissolved Inorganic Carbon ◽  
Eastern Mediterranean ◽  
Perfect Match ◽  
Age Determination ◽  
Water Interface ◽  
The Real ◽  
Radiocarbon Age ◽  
The Core

Two simple algorithms are suggested here to correct for the effect of diffusion and diagenetic sulfate reduction on radiocarbon age determination of marine porewater. The correction algorithms were developed from mass balances of sulfate, dissolved inorganic carbon (DIC), and 14C of the DIC (14CDIC) in vertical concentrations profiles in porewater starting from the sediment water interface. The algorithms were tested on data collected during our recent study of sediment porewaters extracted from the deep Eastern Mediterranean. The real ages of these porewaters varied from present (top of the core) to approximately 30 ka BP (bottom of the core) covering most of the dynamic range of the 14C method (approximately 5 half lives). These ages were markedly older than the ages calculated from 14CDIC analyses by the regular age equation.It is clearly demonstrated that in this case the correction of the apparent age for diffusion across the sediment/water interface is overwhelmingly larger than the correction for the effect of sulfate reduction. The correction for the effect of 14C diffusion alone results in a perfect match between the calculated apparent 14C ages and the real ages of porewater and therefore is the preferred algorithm for correcting apparent ages of porewater.

scholarly journals Further Attempts at Dating the Palynological Sequence of the Hula L07 Core, Upper Jordan Valley, Israel

Radiocarbon ◽  
2001 ◽  
Vol 43 (2B) ◽  
pp. 561-570 ◽  
Author(s):  
M Weinstein-Evron ◽  
J C Vogel ◽  
J Kronfeld
Keyword(s):  
Soil Ph ◽  
Organic Material ◽  
Age Determination ◽  
Jordan Valley ◽  
Radiocarbon Age ◽  
Uranium Series ◽  
The Core ◽  
Acid Leach ◽  
Total Digestion ◽  
Carbonate Material

The palynological sequence of the Hula L07 core was previously correlated with the global oxygen isotope stages 3–5, based on a radiocarbon age determination and comparison with other Levantine paleoclimatological curves. An attempt was made to validate this correlation with Th/U dating. Unlike typical European peat, which is acidic, the soil pH of the Hula peat is mildly basic. Not only does this contribute to the oxidation of palynomorphs, but it also helps to preserve the carbonate material that can be a variable mixture of allogenic, endogenic, and authigenic components. Each component may represent a different degree of uranium series disequilibrium. The thorium (232Th) concentrations of the carbonate are low. Total digestion or acid leach of the sample may not always enable the proper correction for initial thorium. The dating derived from a NaOH-extraction of the organic material, while giving apparently better ages, also suffers from the presence of the carbonate admixture. It appears that, while 14C dating can be considered suitable for the younger portions of the core, techniques based upon the U-series may not be as efficacious in dating this important record of climatic change.

THE PROFILE OF A LEADER AND HIS LEDERSHIP

2018 ◽  
Vol 28 (1) ◽  
pp. 345-350
Author(s):  
Ali Hajro
Keyword(s):  
Leadership Skills ◽  
Real Power ◽  
Governmental Organization ◽  
Factors Affecting ◽  
The Real ◽  
The Core ◽  
Behavior Code ◽  
The People ◽  
Study Case ◽  
Personal Skills

The Current and future leaders live in a turbulent and chaotic environment, where the real power of acting derives from the recognition of the concept of change and looking for options. In this type of environment a lot of competence is necessary for the leaders to survive. The aim of this study case was to explore i.e. gain a clearer picture of the position of the leader, their characteristics, functions, levels, the core and the factors affecting the leader and their leadership. To see what type of leader the people want simply to draw conclusions about the characteristics, qualities and techniques of a leader and their leadership. So that in the end, to have empirical proof of the leader. The set goal in this study case is today’s leaders in everyday process, starting from the very beginning of their work, to serve as an example in developing inter-personal skills at the same time as treating people with dignity and respect. In other words, they have to possess leadership skills, characteristics and the necessary actions. This research aims at finding out the real attributes that is the profile of a leader and their leadership running an organization regardless if it is economic, political, and military or some other non-governmental organization. The values are more than a set of rules, they are not only behavior code, and they say what a leader should be every day in every action that they take. The values shade the leaders’ identity and the organization that they run.

scholarly journals VLBI Observations of the Radio Jet in 3C 273

1988 ◽  
Vol 129 ◽  
pp. 27-28
Author(s):  
S. C. Unwin ◽  
R. J. Davis
Keyword(s):  
Dynamic Range ◽  
Large Range ◽  
High Dynamic Range ◽  
No Emission ◽  
The Core ◽  
Vlbi Observations ◽  
High Dynamic ◽  
Quasar 3C 273

We present a new high dynamic range map of the quasar 3C 273, made from observations with a VLBI network of 12 telescopes. This new map at 18 cm wavelength has one of the highest dynamic ranges yet achieved with VLBI, and it shows the ‘jet’ extending to at least 180 milliarcsec, or 330 pc from the nucleus of the quasar. Strong limits can be placed on the brightness of any ‘counter-jet’ on kiloparsec-scales, as no emission is visible on the opposite side of the ‘core’. Combining with other VLBI, VLA and MERLIN maps shows that the jet is visible and continuous over a very large range of scales, from 1 pc to 40 kpc.

The Design of ZigBee Wireless Network for the Detection Platform of the Cylinders

2012 ◽  
Vol 241-244 ◽  
pp. 2504-2509
Author(s):  
Yan Li ◽  
Qiao Xiang Gu
Keyword(s):  
Real Time ◽  
Wireless Network ◽  
Environmental Conditions ◽  
Protocol Stack ◽  
The Real ◽  
The Core ◽  
Core Components ◽  
Real Time Detection ◽  
Cable Connection

The equipment, called detection platform of the cylinders, is used for detecting cylinders so that cylinders can be at ease use. In order to transmit the real-time detection data to PC for further processing, the platform should be connected with PC. Cable connection, in some production and environmental conditions, is limited. Under the circumstance, building wireless network is the better choice. Through comparative studying, ZigBee is chosen to be the technology for building wireless network. ZigBee chip and ZigBee2006 protocol stack are the core components in the ZigBee nodes.

Traffic Congestion Reduction and Accident Circumvention System via Incorporation of CAV and VANET

2021 ◽  
Vol 12 (1) ◽  
pp. 53-72
Author(s):  
Mohsin Khan ◽  
Bhavna Arora
Keyword(s):  
Real Time ◽  
Data Transmission ◽  
Traffic Congestion ◽  
Ad Hoc Network ◽  
Discrete System ◽  
Ad Hoc ◽  
New Age ◽  
The Real ◽  
Automated Vehicle ◽  
The Core

Connected automated vehicle (CAV) technology is the core for the new age vehicles in research phase to communicate with one another and assimilation of vehicular ad-hoc network (VANET) for the transference of data between vehicles at a quantified place and time. This manuscript is an enactment of the algorithms associated to the maintenance of secure distance amongst vehicles, lane shifting, and overtaking, which will diminish the occurrence of collisions and congestions especially phantom jams. Those implementations are centered over CAV and VANET technology for the interconnection of the vehicles and the data transmission. The data is associated to the aspects of a vehicle such as speed, position, acceleration, and acknowledgements, which acts as the fundamentals for the computation of variables. In accordance with the environment of a particular vehicle (i.e., its surrounding vehicles), real-time decisions are taken based on the real-time computation of the variables in a discrete system.

scholarly journals Sediment-water column fluxes of carbon, oxygen and nutrients in Bedford Basin, Nova Scotia, inferred from <sup>224</sup>Ra measurements

2013 ◽  
Vol 10 (1) ◽  
pp. 53-66 ◽  
Author(s):  
W. J. Burt ◽  
H. Thomas ◽  
K. Fennel ◽  
E. Horne
Keyword(s):  
Organic Matter ◽  
Nova Scotia ◽  
Water Column ◽  
Explicit Knowledge ◽  
Dissolved Inorganic Carbon ◽  
Chemical Constituents ◽  
Water Interface ◽  
Benthic Fluxes ◽  
Pore Waters ◽  
Overlying Water

Abstract. Exchanges between sediment pore waters and the overlying water column play a significant role in the chemical budgets of many important chemical constituents. Direct quantification of such benthic fluxes requires explicit knowledge of the sediment properties and biogeochemistry. Alternatively, changes in water-column properties near the sediment-water interface can be exploited to gain insight into the sediment biogeochemistry and benthic fluxes. Here, we apply a 1-D diffusive mixing model to near-bottom water-column profiles of 224Ra activity in order to yield vertical eddy diffusivities (KZ), based upon which we assess the diffusive exchange of dissolved inorganic carbon (DIC), nutrients and oxygen (O2), across the sediment-water interface in a coastal inlet, Bedford Basin, Nova Scotia, Canada. Numerical model results are consistent with the assumptions regarding a constant, single benthic source of 224Ra, the lack of mixing by advective processes, and a predominantly benthic source and sink of DIC and O2, respectively, with minimal water-column respiration in the deep waters of Bedford Basin. Near-bottom observations of DIC, O2 and nutrients provide flux ratios similar to Redfield values, suggesting that benthic respiration of primarily marine organic matter is the dominant driver. Furthermore, a relative deficit of nitrate in the observed flux ratios indicates that denitrification also plays a role in the oxidation of organic matter, although its occurrence was not strong enough to allow us to detect the corresponding AT fluxes out of the sediment. Finally, comparison with other carbon sources reveal the observed benthic DIC release as a significant contributor to the Bedford Basin carbon system.

scholarly journals PRELIMINARY STUDIES ON SEDIMENT CORE FROM THE TYRO BASIN

2017 ◽  
Vol 50 (1) ◽  
pp. 324
Author(s):  
M. Geraga ◽  
Ch. Anagnostou ◽  
I. Iliopoulos ◽  
M. Kontali
Keyword(s):  
Mediterranean Sea ◽  
Sediment Core ◽  
Eastern Mediterranean ◽  
Planktonic Foraminifera ◽  
Mineralogical Composition ◽  
Eastern Mediterranean Sea ◽  
Sediment Samples ◽  
Preliminary Results ◽  
The Core ◽  
Mineral Constituents

The present paper summarizes the preliminary results of the mineralogical and micropaleontological analysis conducted on sediment samples from core TYR05 retrieved from the anoxic and hypersaline Tyro basin in the eastern Mediterranean Sea. The core comprises a complex lithostratigraphic sequence attributed to the strong geodynamic regime of the area. The planktonic foraminifera associations present fluctuations which coincide with changes in the lithology of the core. The mineralogical composition of the sediments shows influence from the evaporites developed on the bottom of the basin. The mineral constituents in association to the microfauna assemblages suggest that the sediments include sapropelic layers. Further analyses are needed in order to determine safely the sapropelic deposits.

scholarly journals Grave of the Corded Ware culture from Węgrzce, Kraków District

2020 ◽  
Vol 88 ◽  
pp. 63-78
Author(s):  
Maciej Nowak ◽  
Barbara Musiał-Łaczek ◽  
Piotr Włodarczak
Keyword(s):  
Age Determination ◽  
Local Features ◽  
Radiocarbon Age ◽  
Funeral Rite ◽  
Detached House ◽  
Archaeological Excavations

Grave 3/2016 from site 3 in Węgrzce, Comm. Zielonki, Kraków District was discovered during archaeological excavations preceding construction of a detached house. This was a niche grave, holding two burials: a male aged 38–47 years, and a child 4–5 years old. The recorded funeral rite is characteristic of a cluster of Corded Ware culture cemeteries on the lower Dłubnia River, near Kraków. A vessel recovered from the grave reveals local features characteristic of that cluster. One radiocarbon age determination was obtained for the burial, pointing to ca. 2470–2350 BC as the most likely range. Thus, the grave links with the younger phase of the Final Eneolithic in Lesser Poland.

scholarly journals ‘THE RULE OF THREE’ IN THE GROWTH STORIES – GANGBAIK LEE’S DRAMA “LIKE LOOKING AT THE FLOWER IN THE MIDWINTER”

2016 ◽  
Vol 1 ◽  
pp. 11-22
Author(s):  
Mansu KIM
Keyword(s):  
Fairy Tale ◽  
The Self ◽  
The Real ◽  
Final Destination ◽  
The Third ◽  
The Core ◽  
Rule Of Three ◽  
The Poor ◽  
The World

This paper focused on the structure of the growth stories, especially in surveying Gangbaek Lee’s (이강백) drama “Like Looking at the Flower in the Mid-winter (동지섣달 꽃 본 듯이)”. It is structured by ‘rule of the three’. In this text, three sons go to seek their mother, they experience the tests three times. Third son wins the game because he succeeds to find his true and alternative mother. It is similar to the story of English fairy tale “Three Little Pigs”.  In Freudian terms, the characters of the both texts are superego, ego and id. The core of the growth story is that third son (id) wins the first son (superego) and the second son (ego) by using his own energy (meaningful labor). In Levi Strauss’ terms, the contrast between the third and the others can be schemed the contrast between culture and nature. Lee’s drama presents the third son as the real hero who overcomes two elder brothers. The first is so conservative (oversleep), the second is so selfish (overeat). Two brothers were too political or too ideal to become a true, humanistic and warm-minded adult. In his view, ‘drama’ related to the third son is the most humanistic and warm-minded action in the world. These both stories are based on the plot ‘rags to riches’ which contains the success of the poor and powerless. In other words, the poor and weak child can grow to the true hero, and reach the final destination, according to the Gustav Jung’s expression, ‘the Self as a Whole’.

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