scholarly journals High-resolution records of anthropogenic activity and geohazards from the reservoir of Sun Moon Lake, Central Taiwan

Elem Sci Anth ◽  
2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Huei-Fen Chen ◽  
Kuo-Yen Wei ◽  
Jyh-Jaan Steven Huang ◽  
Chi-Cheng Lin ◽  
Chih-Chieh Su ◽  
...  
Keyword(s):  
World War Ii ◽  
Hydroelectric Power Plant ◽  
Precipitation Event ◽  
Anthropogenic Activity ◽  
Hydroelectric Power ◽  
Event Correlation ◽  
World War ◽  
X Ray ◽  
Xrf Scanning ◽  
Moon Lake

Sun Moon Lake is the first dam reservoir constructed in Taiwan with the capability of generating hydroelectricity satisfying the whole Taiwan need during the Japanese colonial period since 1934 CE. Now, the Sun Moon Lake is one of the biggest hydropower stations in Taiwan and has become an important touring area. During World War II (1944–1945 CE), the hydroelectric power plant at Sun Moon Lake was bombed by the U.S. air force, which caused severe damage to the dam structure. More recently, the dam structure was also damaged during the 1999 CE Chi-Chi earthquake whose epicenter is nearby in the Nantou County. A suite of cores were taken from both Sun Lake and Moon Lake, and two selected cores, Sun 2–1 and SM 16 4–3, from Sun Lake were detailed studied with multiple analyses, including X-ray imaging, magnetic susceptibility, visible spectrophotometry, X-ray fluorescence (XRF) scanning, and mineral analysis. We discovered that the increase of Ca content in the sediments not only clearly indicates when the dam was constructed at Sun Moon Lake but also records evidence of structure repairs after both the World War II bombing and the Chi-Chi earthquake. Additionally, the yellow turbidite, X-ray image, and low-Ca signals in Core Sun 2–1 strongly correlate to the typhoon events that caused severe floods in the watershed of Zhuoshui River. The turbidite layers caused by the 1963 Gloria Typhoon are also characterized by conspicuous high peak of Fe/Mn in both cores. This study shows that XRF scanning results are useful for recognition of human activity and for high precipitation event correlation. Moreover, the appearance of charcoal layers shows evidence of forest burning and slash-and-burn activities by humans during the past 4,000 years back to the Middle Neolithic Age.

The Evolution of X-Ray Instrumentation at Rich. Seifert & Co.

1995 ◽  
Vol 39 ◽  
pp. 47-56
Author(s):  
A. Haase
Keyword(s):  
World War Ii ◽  
World War I ◽  
Science And Technology ◽  
German Language ◽  
X Rays ◽  
X Ray Diffraction ◽  
World War ◽  
Executive Management ◽  
X Ray ◽  
Max Von Laue

To facilitate orientation in time, some selected events will be briefly presented. Approximately five hundred years ago, Columbus discovered America. One hundred years ago, on November 8th, 1895, Wilhelm Conrad R6ntgen discovered the X-rays which in the German language are called after him. In 1912 Max von Laue conducted the first X-ray diffraction experiment. In 1892 Richard Seifert Sr. founded the Electrotechnical Plant in Hamburg. After World War I (1914-1918) the company founder gradually handed the firm over to his son Richard Seifert Jr. After his son had completed studies in physics and electrical engineering he conducted pioneering experiments on the application of X-rays in science and technology. From the very beginning, X-ray equipment was produced in the three fields of medicine, science and technology. It was only ten years after World War II (1939-1945) that the line of medical equipment was discontinued and the daughter [1] as a member of the third generation gradually took over executive management tasks.

scholarly journals Terrazzo floor from the Jewish Historical Institute in Warsaw – mineralogical characterization, conservation and impact of fire

2017 ◽  
Vol 4 (1) ◽  
pp. 1-13
Author(s):  
Wojciech Bartz ◽  
Jacek Martusewicz
Keyword(s):  
World War Ii ◽  
Ordinary Portland Cement ◽  
Simultaneous Thermal Analysis ◽  
Iron Ions ◽  
Thermal Impact ◽  
X Ray Diffraction ◽  
World War ◽  
Mineralogical Characterization ◽  
X Ray ◽  
Repair Mortars

Abstract Samples of historical terrazzo floor from the Jewish Historical Institute in Warsaw, dated back to the thirties of the twentieth century, have been analysed. Investigations by polarised optical microscopy, scanning microscopy, powder X-ray diffraction and simultaneous thermal analysis were preformed. Based on the results obtained, it was concluded that terrazzo tiles were prepared on the basis of ordinary Portland cement and aggregate, dominated with crushed stone (marble, serpentinite, limestone and marl), accompanied by sparse quartz sand grains. The binding mass was colourised with the use of pigments containing iron ions. The occurrence of altered serpentinite and marble grains, the latter clouded and partly replaced with micrite, the presence of portlandite, indicate the terrazzo tiles were subjected to thermal impact. This is related to the fire that took place at the beginning of World War II. Based on this study, repair mortars were formulated, on one hand compatible with the authentic ones, on the other retaining traces of fire.

scholarly journals Correlation between the lenghts of the long bones of the forearm and the fibula with body height in our population

2012 ◽  
Vol 69 (5) ◽  
pp. 394-398 ◽  
Author(s):  
Nadica Marinkovic ◽  
Jasenka Vasic-Vilic
Keyword(s):  
World War Ii ◽  
Body Height ◽  
Population Based ◽  
Skeletal Remains ◽  
Long Bones ◽  
World War ◽  
X Ray ◽  
Bone Length ◽  
The World

Background/Aim. The task of a forensic examiner during exhumation of skeletal remains is to calculate antemortem height of a person whose skeletal remains were found. Anthropological investigations which provided formulae for calculating ante-mortem body height date back from XIX or from the first half of XX centuries. The most commonly used formulae are those of Trotter- Gleser, which were used to investigate skeletal remains from the World War II. Those investigations were conducted on skeletal remains of various ages and degrees of decay. Our experience with exhumation have shown that the present formulae do not deliver reliable values of antemortem height. The aim of this study was to investigate if there is a correlation of the length of long bones of leg and forearm with body height within our population and to establish the formulae for calculating ante-mortem body height within our population based on the obtained values. Methods. The lengths of ulna, radius, fibula and tibia were determined precisely by measuring bones on living individuals using a digital X-ray system. The height of individuals whose bones were measured was determined using an anthropometer. Results. The highest degree of correlation between bone length and body height was found for tibia in males (r = 0.859, p < 0.005) and ulna in females (r = 0.679, p < 0.05). We calculated the regression formulae for determination of ante-mortem body height that differ from the current body height formulae. Conclusion. In our population the length of long bones of the forearm and the leg are characterized by various degree of correlation with body height. The formulae that we set, make less distinction between the measured and the calculated body height as compared with the Trotter-Gleser formulae. We do hope that their implementation will facilitate identification of sceletal remains in our population.

scholarly journals An Inquest into the Quests and Conquests of the Radiography Profession in Nigeria

2019 ◽  
Vol 33 (1) ◽  
Author(s):  
Thomas Adejo
Keyword(s):  
World War Ii ◽  
20Th Century ◽  
Postgraduate Education ◽  
Professional Association ◽  
Historical Research ◽  
Weight Of Evidence ◽  
World War ◽  
X Ray ◽  
Training Institutions ◽  
Prospective Longitudinal

Background: As of 1942, there were neither indigenous radiographers nor radiography training institutions in Nigeria. Presently, progress made is breathtaking. Despite the strides, there were no readily accessible records to give researchers insight on the trajectory of the profession since the beginning of the 20th century. Objective: To trace the origin, investigate the quests, ascertain the conquests of the radiography profession in Nigeria and then document them for easy accessibility. Methods: A prospective, longitudinal historical research spanning 6 years (2013 – 2019). Data emanated from records of the professional association (ARN), publications in the radiography profession, and interview of older radiographers, especially those who were witnesses to professional milestones. Internet search complemented retrieved information. The draft of the work was uploaded continually on radiographers’ Facebook and WhatsApp platforms for inputs. The author resolved discrepancies in the account through the weight of evidence for or against. Results: Approximately 5,000 persons have passed through basic radiography training in Nigeria, with ≤ 5% having postgraduate qualifications. Training institutions have evolved from two monotechnics to ≥ 10 universities, with three of those are involved in postgraduate education. Radiography has witnessed considerable role extensions from traditional x-ray to more advanced practices and complex modalities. Conquests were, however, sometimes reversed, or jeopardized by internal upheavals and meddlesome interlopers. Conclusion: Radiography in Nigeria has witnessed breathtaking evolution in training and practice from the time of World War II (WWII) until date. Radiographers themselves, with significant assistance from non-radiographers, engineered those milestones. A consolidation of intra-professional cohesion and inter-professional synergy is needful, for more focused and dedicated services to humanity.

Arthur von Hippel and Magnetism

MRS Bulletin ◽  
2005 ◽  
Vol 30 (11) ◽  
pp. 849-853 ◽  
Author(s):  
John B. Goodenough
Keyword(s):  
World War Ii ◽  
Wide Frequency Range ◽  
X Ray Diffraction ◽  
World War ◽  
Relaxation Data ◽  
Magnetic Studies ◽  
Microwave Frequencies ◽  
X Ray ◽  
Loosely Coupled ◽  
Fundamental Information

AbstractThis article examines the role that Arthur von Hippel played in magnetism work in the 1950s.Von Hippel understood that the ferrimagnetic insulators represented by the ferrospinels, magnetoplumbites, and ferrogarnets were critical for the high-frequency technology that was being developed after World War II. At the Laboratory for Insulation Research at MIT, he and his students concentrated on the response of these materials to electric and magnetic excitations over a wide frequency range that extended, with gaps, from dc to the ultraviolet. For magnetic studies, he used microwave frequencies to obtain resonance and relaxation data that could be interpreted because the magnetic spins are relatively loosely coupled to their surroundings. He supplemented these resonance studies with classical magnetometer, transport, and x-ray diffraction measurements on single-crystal samples in order to obtain fundamental information that would aid in the design of materials for technical applications.

Non-destructive Spectrometric Determination of Trace Element Concentration of Rubidium, Strontium, Yttrium Zirconium and Niobium in Ceramics

1987 ◽  
Vol 42 (11) ◽  
pp. 1253-1256 ◽  
Author(s):  
C. T. Yap
Keyword(s):  
World War Ii ◽  
Element Concentration ◽  
Trace Element Concentration ◽  
Nondestructive Method ◽  
Spectrometric Method ◽  
World War ◽  
X Ray ◽  
The Republic ◽  
Non Destructive

A simple X-ray spectrometric method for the simultaneous quantitative determination of the trace elements Rb, Sr, Y, Zr and Nb in Chinese porcelains is described. The results of the analysis show that Jingdezhen porcelains from later Ming to the Republic period have concentrations of these elements lying within narrow ranges whereas modern (after World War II) porcelains, whether Jingdezhen or otherwise, have concentrations of one or more of these elements lying outside these ranges. This offers a simple nondestructive method of detecting modern fakes.

scholarly journals Thatcher, Scientist

2011 ◽  
Vol 65 (3) ◽  
pp. 215-232 ◽  
Author(s):  
Jon Agar
Keyword(s):  
World War Ii ◽  
Science Policy ◽  
Royal Society ◽  
Women Scientists ◽  
World War ◽  
X Ray ◽  
Research Scientist ◽  
X Ray Crystallography ◽  
Industrial Chemist

This paper has two halves. First, I piece together what we know about Margaret Thatcher's training and employment as a scientist. She took science subjects at school; she studied chemistry at Oxford, arriving during World War II and coming under the influence (and comment) of two excellent women scientists, Janet Vaughan and Dorothy Hodgkin. She did a fourth-year dissertation on X-ray crystallography of gramicidin just after the war. She then gathered four years' experience as a working industrial chemist, at British Xylonite Plastics and at Lyons. Second, my argument is that, having lived the life of a working research scientist, she had a quite different view of science from that of any other minister responsible for science. This is crucial in understanding her reaction to the proposals—associated with the Rothschild reforms of the early 1970s—to reinterpret aspects of science policy in market terms. Although she was strongly pressured by bodies such as the Royal Society to reaffirm the established place of science as a different kind of entity—one, at least at core, that was unsuitable to marketization—Thatcher took a different line.

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