scholarly journals New data on the Roman temporary camps in Șureanu Mountains

2020 ◽  
Vol 57 ◽  
pp. 63-88
Author(s):  
Felix Marcu ◽  
◽  
Máté Szabó ◽  

The conflict archaeology topic is a challenge all over the world, developing in the past ten years simultaneously with the new techniques in understanding the past and use of high‑resolution recordings of cultural heritage. Besides, in close relation with the topic of conflict archaeology is continuously improved the methodology of another sub‑domain, the landscape archaeology, with great results in the last couple of years, important here are the discovery of many new temporary camps in Germany and north west of the Iberian Peninsula. Especially the last ones are similar in shape and positioning with the Roman camps in Șureanu Mountains, though each has its own uniqueness. These reveal in a very special way the Roman army strategy in one of the most important conflicts of the Roman Empire in an alpine area.

2000 ◽  
Vol 80 (2) ◽  
pp. 235-243
Author(s):  
John Castell

Aquaculture has a long history, with carp culture in Asia starting before 2000 BC and oyster culture in the Roman Empire before the time of Julius Caesar. However, it is clearly the past 40 yr that have seen the most dramatic expansion of aquaculture. The world's population now exceeds 6 billion people and is still growing at an alarming rate. The world's wild fish harvest has clearly peaked at or above the maximum sustainable yield of about 90 million t. Many fish stocks are suffering from over-fishing and there is little hope of any increase in the capture fisheries production. Though modern agricultural practices have been very efficient at increasing the per acre yields, the world is experiencing an alarmingly steady decrease in the amount of agricultural land devoted to food production. In the past 20–30 yr production of fish, molluscs, crustaceans and aquatic plants (aquaculture) has become an increasingly important means of producing food, and in some countries aquaculture production accounts for more than half of the total fishery harvest and is even as high as 90% in a few countries. I have reviewed the historical growth of aquaculture, compared the product value in various countries and reviewed aquaculture practices for a number of plant, molluscan, crustacean and fish species around the world. These culture technologies were compared and contrasted with agricultural practices. Finally, some predictions for the future of aquaculture development in Canada and the world have been made. Key words: Canadian aquaculture, history, salmon, fish farming, production statistics, fish culture technology


Author(s):  
Brian Fagan

“Time we may comprehend,” wrote the English physician Sir Thomas Browne in 1643. “’Tis but five days older than ourselves.” Browne’s view of the past encompassed the Greeks and Romans and a humankind created by God in the Old Testament. Also in the seventeenth century, Archbishop James Ussher of Armagh in Ireland used the long genealogies in the Scriptures to calculate that the world had been created on the evening of October 22, 4004 B.C. Thus, according to Christian dogma, the entire span of human existence was a mere six thousand years. After the collapse of the Roman Empire, the study of the past fell into oblivion. Babylon reverted to desert; Petra slumbered in its secluded canyon. Ancient ruins of any kind were a curiosity, often thought to be the work of giants. With the Renaissance came a renewed interest in classical learning and in the remains of ancient civilizations. Thomas Browne and his English contemporaries were steeped in knowledge of ancient Greece and Rome. The Renaissance was an age of collectors and scholars, of acquisitive cardinals and nobles who flocked to Mediterranean lands and returned laden with antiquities for their private collections and for what were then known as “cabinets of curiosities.” Soon, a stream of young travelers followed in their footsteps to Italy, taking what became known as the “grand tour” as part of their education (see Chapter 3). Such often frivolous travelers became the first archaeological tourists, but not necessarily the most perceptive. By 1550, it was fashionable to be an antiquary, a collector or student of ancient things. But only the wealthiest traveler could afford a grand tour and could pay for classical treasures. The less affluent indulged their passion for the past at home, collecting Roman coins and inscriptions and, above all, traveling the countryside in pursuit of what the English schoolmaster William Camden (1551–1623) called “the backward-looking curiosity.” This open-ended inquisitiveness took Camden and his contemporaries to eroded burial mounds on windy uplands, to ancient fortifications in Denmark, and to the mysterious stone circles known as Stonehenge.


Diagnostics ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1788
Author(s):  
Joseph C. Lownik ◽  
Jared S. Farrar ◽  
Grayson W. Way ◽  
Angela McKay ◽  
Pavitra Roychoudhury ◽  
...  

SARS-CoV-2, the virus responsible for COVID-19, emerged in late 2019 and has since spread throughout the world, infecting over 200 million people. The fast spread of SARS-CoV-2 showcased the need for rapid and sensitive testing methodologies to help track the disease. Over the past 18 months, numerous SARS-CoV-2 variants have emerged. Many of these variants are suggested to be more transmissible as well as less responsive to neutralization by vaccine-induced antibodies. Viral whole-genome sequencing is the current standard for tracking these variants. However, whole-genome sequencing is costly and the technology and expertise are limited to larger reference laboratories. Here, we present the feasibility of a fast, inexpensive methodology using snapback primer-based high-resolution melting to test for >20 high-consequence SARS-CoV-2 spike mutations. This assay can distinguish between multiple variant lineages and be completed in roughly 2 h for less than $10 per sample.


Author(s):  
Herwig Schopper

AbstractSince old ages it has been one of the noble aspirations of humankind to understand the world in which we are living. In addition to our immediate environment, planet earth, two more remote frontiers have attracted interest: the infinitely small and the infinitely large. A flood of new experimental and theoretical results obtained during the past decades has provided a completely new picture of the micro- and macrocosm and surprisingly intimate relations have been discovered between the two. It turned out that the understanding of elementary particles and the forces acting between them is extremely relevant for our perception of the cosmological development. Quite often scientific research is supported because it is the basis for technical progress and for the material well-being of humans. The exploration of the microcosm and the universe contributes to this goal only indirectly by the development of better instruments and new techniques. However, it tries to answer some fundamental questions which are essential to understand the origins, the environment and the conditions for the existence of humankind and thus is an essential part of the cultural heritage.


1980 ◽  
Vol 3 (1) ◽  
pp. 111-124
Author(s):  
David P. Weikart

Creating change in traditional practices or introducing service where none exists is a delicate and time-consuming exercise requiring commitment, skill, and patience by those who aspire to such goals. The record of success by those who try is limited, and many can recount their personal and professional frustrations. It seems as if the flow of history with its ebb tides of myth and practice holds more force than the power of rational attacks on clusters of problems through systematic research and development. The power of the information wrested from such efforts seems pale beside the inertia of the system which endlessly generates the issues that call for resolution. Yet change occurs, projects succeed, new techniques are adopted, and even obstinate bureaucracies evolve in response to persistent and focused efforts to force key issues and enthusiasms to the surface. Citizens involved in creative change must be prepared to labor toward small goals that only gradually yield to larger attainments. Over the past several decades of change throughout the world, a variety of lessons have been learned about such processes, and a consensus seems to be emerging that will encourage those persistent enough to remain at their stations. This paper will touch briefly on some of these lessons.


2008 ◽  
Vol 25 (6) ◽  
pp. 833-852 ◽  
Author(s):  
Carol Anne Clayson ◽  
Lakshmi Kantha

Abstract Mixing in the free atmosphere above the planetary boundary layer is of great importance to the fate of trace gases and pollutants. However, direct measurements of the turbulent dissipation rate by in situ probes are very scarce and radar measurements are fraught with uncertainties. In this paper, turbulence scaling concepts, developed over the past decades for application to oceanic mixing, are used to suggest an alternative technique for retrieving turbulence properties in the free atmosphere from high-resolution soundings. This technique enables high-resolution radiosondes, which have become quite standard in the past few years, to be used not only to monitor turbulence in the free atmosphere in near–real time, but also to study its spatiotemporal characteristics from the abundant archives of high-resolution soundings from around the world. Examples from several locations are shown, as well as comparisons with radar-based estimations and a typical Richardson number–based parameterization.


1962 ◽  
Vol 11 (02) ◽  
pp. 137-143
Author(s):  
M. Schwarzschild

It is perhaps one of the most important characteristics of the past decade in astronomy that the evolution of some major classes of astronomical objects has become accessible to detailed research. The theory of the evolution of individual stars has developed into a substantial body of quantitative investigations. The evolution of galaxies, particularly of our own, has clearly become a subject for serious research. Even the history of the solar system, this close-by intriguing puzzle, may soon make the transition from being a subject of speculation to being a subject of detailed study in view of the fast flow of new data obtained with new techniques, including space-craft.


Author(s):  
John Mansfield

Advances in camera technology and digital instrument control have meant that in modern microscopy, the image that was, in the past, typically recorded on a piece of film is now recorded directly into a computer. The transfer of the analog image seen in the microscope to the digitized picture in the computer does not mean, however, that the problems associated with recording images, analyzing them, and preparing them for publication, have all miraculously been solved. The steps involved in the recording an image to film remain largely intact in the digital world. The image is recorded, prepared for measurement in some way, analyzed, and then prepared for presentation.Digital image acquisition schemes are largely the realm of the microscope manufacturers, however, there are also a multitude of “homemade” acquisition systems in microscope laboratories around the world. It is not the mission of this tutorial to deal with the various acquisition systems, but rather to introduce the novice user to rudimentary image processing and measurement.


Author(s):  
John L. Hutchison

Over the past five years or so the development of a new generation of high resolution electron microscopes operating routinely in the 300-400 kilovolt range has produced a dramatic increase in resolution, to around 1.6 Å for “structure resolution” and approaching 1.2 Å for information limits. With a large number of such instruments now in operation it is timely to assess their impact in the various areas of materials science where they are now being used. Are they falling short of the early expectations? Generally, the manufacturers’ claims regarding resolution are being met, but one unexpected factor which has emerged is the extreme sensitivity of these instruments to both floor-borne and acoustic vibrations. Successful measures to counteract these disturbances may require the use of special anti-vibration blocks, or even simple oil-filled dampers together with springs, with heavy curtaining around the microscope room to reduce noise levels. In assessing performance levels, optical diffraction analysis is becoming the accepted method, with rotational averaging useful for obtaining a good measure of information limits. It is worth noting here that microscope alignment becomes very critical for the highest resolution.In attempting an appraisal of the contributions of intermediate voltage HREMs to materials science we will outline a few of the areas where they are most widely used. These include semiconductors, oxides, and small metal particles, in addition to metals and minerals.


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