scholarly journals Archaeology and the debate on the transition from reindeer hunting to pastoralism

Rangifer ◽  
2011 ◽  
Vol 31 (1) ◽  
pp. 111 ◽  
Author(s):  
Ingrid Sommerseth

The distinctive Sami historical land use concerning reindeer management and settlement of inner Troms, North Norway, is reflected in places with archaeological remains. The insight and knowledge connected with these places can be accessed through oral traditions and place-names where reindeer management is embedded in reindeer knowledge developed over long time spans. Previous distinctions between wild reindeer hunting and pastoral herding can be redefined, since much of the traditional knowledge concerning the wild reindeer (goddi) may have been transferred to the domesticated animals (boazu). The transition from reindeer hunting to pastoralism is a current research focus and archaeological results from inner Troms indicate that several Sami dwellings with árran (hearths) are related to a transitional period from AD 1300 to 1400. This period is marked by a reorganisation of the inland Sami siida (collective communities), and changes in landscape use wherein seasonal cycles and grazing access began to determine the movements of people and their domestic reindeer herds. This reorganisation was a response to both external political relations and the inner dynamic of the Sami communities. The first use of tamed reindeer was as decoys and draft animals in the hunting economy, only later becoming the mainstay of household food supply in reindeer pastoralism, providing insurance for future uncertainties. The formation of the national border between Norway-Denmark and Sweden in 1751 led to extensive changes in the previously trans-national mobility pattern, leading to fragmentation of the old siidas and to a new stage of nomadic pastoral economy.

2019 ◽  
pp. 10-23
Author(s):  
T. A. Akhadov ◽  
S. Yu. Guryakov ◽  
M. V. Ublinsky

For a long time, there was a need to apply magnetic resonance imaging (MRI) technique for lung visualization in clinical practice. The development of this method is stimulated by necessity of the emergence of an alternative to computed tomography, especially when radiation and injection of iodine-containing contrast agents are contraindicated or undesirable, for example, in pregnant women and children, people with intolerance to iodinated contrast. One of the reasons why lung MRI is still rarely used is lack of elaborated standardized protocols that would be adapted to clinical needs of medical society. This publication is a current literature review on the use of MRI in lung studies.


Life ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 13
Author(s):  
João Rainha ◽  
Joana L. Rodrigues ◽  
Lígia R. Rodrigues

Saccharomyces cerevisiae has been for a long time a common model for fundamental biological studies and a popular biotechnological engineering platform to produce chemicals, fuels, and pharmaceuticals due to its peculiar characteristics. Both lines of research require an effective editing of the native genetic elements or the inclusion of heterologous pathways into the yeast genome. Although S. cerevisiae is a well-known host with several molecular biology tools available, a more precise tool is still needed. The clustered, regularly interspaced, short palindromic repeats–associated Cas9 (CRISPR-Cas9) system is a current, widespread genome editing tool. The implementation of a reprogrammable, precise, and specific method, such as CRISPR-Cas9, to edit the S. cerevisiae genome has revolutionized laboratory practices. Herein, we describe and discuss some applications of the CRISPR-Cas9 system in S. cerevisiae from simple gene knockouts to more complex processes such as artificial heterologous pathway integration, transcriptional regulation, or tolerance engineering.


1882 ◽  
Vol 11 ◽  
pp. 202-204
Author(s):  
Helmholtz

In 1872 I wrote a paper on galvanic currents, which continue for a long time in an electrolytic cell, under the influence of an electro-motive force, too feeble to effect electrolytic decomposition. I tried at that time to prove that the long duration of these currents was caused by oxygen dissolved in the water of the electrolyte, combining with the hydrogen, which is carried by the electrolytic motion to the cathode. So the oxygen, which existed formerly near the surface of the cathode, is taken away, and instead of it the same amount of oxygen is liberated at the anode. This can return by diffusion to the cathode, and so the same action can go on without end. It appears as a current producing no electrolytic action. I called it “Electrolytic convection.”


2007 ◽  
Vol 584 ◽  
pp. 415-431 ◽  
Author(s):  
DAVID PRITCHARD

We consider the behaviour of a gravity current in a porous medium when the horizontal surface along which it spreads is punctuated either by narrow fractures or by permeable regions of limited extent. We derive steady-state solutions for the current, and show that these form part of a long-time asymptotic description which may also include a self-similar ‘leakage current’ propagating beyond the fractured region with a length proportional to t1/2. We discuss the conditions under which a current can be completely trapped by a permeable region or a series of fractures.


2021 ◽  
Vol 9 (1) ◽  
pp. 83-90
Author(s):  
Anang Dasa Novfowan ◽  
Mochammad Mieftah ◽  
Wijaya Kusuma

The unbalanced load on distribution transformers is mostly caused of connecting new customers and changing patterns of electricity usage in the community. The impact of the unbalanced load is the emergence of a current flowing on the transformer neutral conductor that causes energy losses. Load balancing of distribution transformers is commonly done by technicians, but the implementation takes quite a long time and is repeated, sometimes up to 4-5 times to get the appropriate results. This is more due to less valid customer phase data. Customer phase verification is needed to accelerate the load balancing process in an effort to reduce losses in distribution transformers. With valid customer phase data, just one stage of load balancing can reduce losses by 1.06%.


2012 ◽  
Vol 622-623 ◽  
pp. 1912-1916
Author(s):  
Qiang Bian ◽  
Yi Liu ◽  
Liang Fen Xiao

For ensuring the life and security of ship, electric fields protection has been used for a long time. The common method of electric fields protection is equipping compensatory anode on the ship and adding a current which can been controlled to it. The electric fields is different when the number of compensatory anode is different. This paper establish a mathematical model of a ship with compensatory, and then analyze the ship’s electric fields when the number of compensatory anode is different. and attain how compensatory anode number affect ship’s electric fields protection.


Author(s):  
Carmen Naturil-Alfonso ◽  
David Sánchez Peñaranda ◽  
Jose Salvador Vicente ◽  
Francisco Marco-Jiménez

Academic procrastination is a fact related to the delay or postpone of academic work until last minute. This phenomenon is evident in a vast majority of university students, and its occurrence is increasing. In order to analyse possible causes and/or solutions, we studied if longer time for accomplishing an assignment incentives or avoids procrastination among university students. Results showed that both short and long time-frame groups tended to procrastinate in the same way. Additionally, academic grades did not revealed differences between groups, as the procrastination was the same between groups. Thus, this study shows that even with longer period of time to accomplish a task, university students tend to procrastinate, and thus seem to have a negative effect on their assignment grades. Therefore, it seems a current problem and measures should be developed in order to solve it.


2017 ◽  
Vol 12 (S331) ◽  
pp. 101-106
Author(s):  
Annop Wongwathanarat

AbstractTo understand a wide variety of properties of young core-collapse supernova (CCSN) remnants being revealed by modern observations three-dimensional simulations of CCSNe starting from the initiation of the explosion until the expanding stellar debris transform into gaseous remnants are needed. We briefly review recent progress in modeling CCSNe on a long time scale. A current effort to model bolometric light curves based on 3D CCSN explosion models for comparison with observational data from SN 1987A is also discussed.


1870 ◽  
Vol 18 (114-122) ◽  
pp. 37-42 ◽  

On the Chlorides of Vanadium and Metallic In the first part of these researches (‘Bakerian Lecture,’ Phil. Trans. 1868, pt. i.) the author stated that the chlorides of vanadium, and probably also the metal itself, could be prepared from the mononitride, the only compound of vanadium not containing oxygen then known. The process for obtaining the mononitride described in the last communication was that adopted by Berzelius for preparing the substance which he conceived to be metal, but which in reality is mononitride. "This method consists in the action of ammonia on the oxitri-chloride; but it cannot be employed for the preparation of large quantities of nitride, owing to the violence of the action and consequent loss of material. The author, seeking for a more economical method, found that if the ammonium metavanadate (NH 4 VO 3 ) be heated for a sufficiently long time at a white heat m a current of dry ammonia, pure vanadium mononitride remains behind. Analysis of a sample thus prepared gave 79·6 per cent, of vanadium and 20·2 per cent, of nitrogen, theory requiring 78·6 and 21·4 per cent, respectively. The mononitride may likewise be directly prepared by igniting vanadium trioxide (V 2 O 3 ) in a current of ammonia at a white heat in a platinum tube, and also by subjecting the dichloride to the same treatment.


2009 ◽  
Vol 31 (1-2) ◽  
pp. 307-310
Author(s):  
Vladislav Nuvano

Abstract This research note describes a project about the relationship between humans and wild reindeer in Chukotka. The study attempts to answer the following questions: 1) How have reindeer herders managed the wild reindeer issue in the past and in the present? and 2) Which peoples have been involved in wild reindeer hunting?


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