Cool versus useful

2009 ◽  
Author(s):  
B. Tommie Usdin
Keyword(s):  
Document Modeling ◽  
Gravitational Pull ◽  
Tool Technology

True versus Useful, or True versus Likely-to-be-useful, are tradeoffs we find ourselves making in document modeling and many other markup-related situations all the time. But Cool versus Useful is a far more difficult tradeoff, especially since our world now includes a number of very cool techniques, tools, and specifications. Cool toys can have a lot of gravitational pull; attracting attention, users, projects, and funding. Unfortunately, there is sometimes a disconnect between the appeal of a particular tool/technology and its applicability in a particular circumstance.

Loom weights in Archaic South Italy and Sicily: Fice case studies

2015 ◽  
Vol 8 ◽  
pp. 123-155
Author(s):  
Hedvig Landenius Enegren
Keyword(s):  
Case Studies ◽  
Indigenous Peoples ◽  
Environmental Conditions ◽  
Experimental Archaeology ◽  
Archaeological Sites ◽  
Site Specificity ◽  
Archaeological Record ◽  
South Italy ◽  
Local Traditions ◽  
Tool Technology

Textiles are perishables in the archaeological record unless specific environmental conditions are met. Fortunately, the textile tools used in their manufacture can provide a wealth of information and via experimental archaeology make visible to an extent what has been lost. The article presents and discusses the results obtained in a research project focused on textile tool technologies and identities in the context of settler and indigenous peoples, at select archaeological sites in South Italy and Sicily in the Archaic and Early Classical periods, with an emphasis on loom weights. Despite a common functional tool technology, the examined loom weights reveal an intriguing inter-site specificity, which, it is argued, is the result of hybrid expressions embedded in local traditions. Experimental archaeology testing is applied in the interpretation of the functional qualities of this common artefact.

The ASEAN Center in Moscow and Its Gravitational Pull

2016 ◽  
Vol 62 (004) ◽  
pp. 29-38
Author(s):  
A. Torkunov
Keyword(s):  
Gravitational Pull

scholarly journals Error estimation on extracorporeal trajectory determination from body scans

2021 ◽  
Author(s):  
F. Riva ◽  
U. Buck ◽  
K. Buße ◽  
R. Hermsen ◽  
E. J. A. T. Mattijssen ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Soft Tissue ◽  
Supine Position ◽  
Post Mortem ◽  
Surface Scanning ◽  
3D Data ◽  
Gravitational Pull ◽  
Scanned Images ◽  
Source Of Error ◽  
Trajectory Determination

AbstractThis study explores the magnitude of two sources of error that are introduced when extracorporeal bullet trajectories are based on post-mortem computed tomography (PMCT) and/or surface scanning of a body. The first source of error is caused by an altered gravitational pull on soft tissue, which is introduced when a body is scanned in another position than it had when hit. The second source of error is introduced when scanned images are translated into a virtual representation of the victim’s body. To study the combined magnitude of these errors, virtual shooting trajectories with known vertical angles through five “victims” (live test persons) were simulated. The positions of the simulated wounds on the bodies were marked, with the victims in upright positions. Next, the victims were scanned in supine position, using 3D surface scanning, similar to a body’s position when scanned during a PMCT. Seven experts, used to working with 3D data, were asked to determine the bullet trajectories based on the virtual representations of the bodies. The errors between the known and determined trajectories were analysed and discussed. The results of this study give a feel for the magnitude of the introduced errors and can be used to reconstruct actual shooting incidents using PMCT data.

ON THE TIMING OF THE OLD COPPER COMPLEX IN NORTH AMERICA: A COMPARISON OF RADIOCARBON DATES FROM DIFFERENT ARCHAEOLOGICAL CONTEXTS

Radiocarbon ◽  
2021 ◽  
pp. 1-19
Author(s):  
David P Pompeani ◽  
Byron A Steinman ◽  
Mark B Abbott ◽  
Katherine M Pompeani ◽  
William Reardon ◽  
...  
Keyword(s):  
Native American ◽  
Lake Sediment ◽  
Copper Complex ◽  
Lake Superior ◽  
Copper Mining ◽  
Radiocarbon Dates ◽  
Copper Mines ◽  
Tool Technology ◽  
High Lead ◽  
Old Copper Complex

ABSTRACT The Old Copper Complex (OCC) refers to the production of heavy copper-tool technology by Archaic Native American societies in the Lake Superior region. To better define the timing of the OCC, we evaluated 53 (eight new and 45 published) radiocarbon (14C) dates associated with copper artifacts and mines. We compared these dates to six lake sediment-based chronologies of copper mining and annealing in the Michigan Copper District. 14C dates grouped by archaeological context show that cremation remains, and wood and cordage embedded in copper artifacts have ages that overlap with the timing of high lead (Pb) concentrations in lake sediment. In contrast, dates in stratigraphic association and from mines are younger than those from embedded and cremation materials, suggesting that the former groups reflect the timing of processes that occurred post-abandonment. The comparatively young dates obtained from copper mines therefore likely reflect abandonment and infill of the mines rather than active use. Excluding three anomalously young samples, the ages of embedded organic material associated with 15 OCC copper artifacts range from 8500 to 3580 cal BP, confirming that the OCC is among the oldest known metalworking societies in the world.

The Teaching of Machine-Tool Technology at University Level

1970 ◽  
Vol 185 (1) ◽  
pp. 83-93 ◽  
Author(s):  
F. Koenigsberger
Keyword(s):  
Machine Tool ◽  
Internal Combustion Engines ◽  
Manufacturing System ◽  
Full Time ◽  
Combustion Engines ◽  
Human Aspects ◽  
University Level ◽  
Time Courses ◽  
Tool Technology ◽  
Specialized Subject

In this paper the problems of introducing the teaching of a specialized subject into undergraduate courses are discussed with particular reference to the specific features of machine-tool technology. These cover the facts that the machine must be considered as part of an overall manufacturing system, so that the concept of performance differs from that encountered in other types of machinery such as internal-combustion engines, and that technological, economic, and human aspects must also be considered. Comparisons are made between Continental, particularly German, practice and present practice in some British universities. Some typical approaches to the organization of postgraduate full-time courses and short-term specialized courses are given. Finally, a comparison is made between the employment of university trained engineers in the machine-tool manufacturing and using industries in Great Britain and in Germany.

scholarly journals I.—Secular Earth-Creep

1909 ◽  
Vol 6 (4) ◽  
pp. 145-148 ◽  
Author(s):  
E. H. L. Schwarz
Keyword(s):  
South Africa ◽  
Diurnal Variation ◽  
Royal Society ◽  
The Sun ◽  
Special Design ◽  
Important Paper ◽  
Preliminary Results ◽  
Gravitational Pull ◽  
Set Up ◽  
Horizontal Pendulum

Dr. J. R. Sutton has recently read a most important paper to the Royal Society of South Africa on the diurnal variation of level at Kimberley. The paper gave the preliminary results of observations made during the course of three years upon the variation of the level of the ground as recorded by a large horizontal pendulum of a special design made for the author by the Cambridge Instrument Company. It appeared from the results that the movements in the surface of the ground, which set up corresponding movements in the pendulum, were very great. The maximum westerly elongation of the extremity of the pendulum occurred about 5.30 a.m., the maximum easterly about 4.15 p.m., the medium positions a little before 11 a.m. and 9.30 p.m. Geometrically these movements may be represented on the hypothesis that the hemisphere facing the sun bulges out, forming a sort of meniscus to the geosphere. The rise and fall of the surface of the ground which such a supposition would postulate is enormous, and the very magnitude has led Dr. Sutton to hesitate in giving the figures. There can, however, be very little doubt that some rise and fall in the earth's surface is occasioned by the sun's gravitational pull, although the present figures may have to be lessened by taking into consideration other causes which contribute to the disturbance of the pendulum.

Tool Technology for Lightweight Structures in 3-D Hybrid Designs

2018 ◽  
Vol 11 (5) ◽  
pp. 42-47
Author(s):  
Ralf Drössler ◽  
Robert Waffler ◽  
Michael Krahl ◽  
Daniel Haider
Keyword(s):  
Lightweight Structures ◽  
Tool Technology

scholarly journals The Confined Atom: James Clerk Maxwell on the Fundamental Particles and the Limits of Scientific Knowledge

2021 ◽  
Vol 29 (2) ◽  
pp. 189-214
Author(s):  
Charis Charalampous
Keyword(s):  
Heat Conduction ◽  
Scientific Knowledge ◽  
Gas Diffusion ◽  
Mathematical Formalism ◽  
James Clerk Maxwell ◽  
Fundamental Particles ◽  
Free Particles ◽  
Gravitational Pull ◽  
Confined Atom

Abstract This paper distinguishes in Maxwell’s thought between “atomic molecules” and “ultimate atoms,” and arrives at a set of properties that characterize each type of atom. It concludes that Maxwell is a mathematical atomist, an approach that entails the notion that although it is impossible to observe the ultimate atoms as free particles, we can nevertheless study them as mathematical observables, on the caveat that mathematical formalism remains tied to phenomenalism and to theoretical interpretations of such phenomena as, for example, mass and force variations, gravitational pull, gas diffusion and viscosity, and heat conduction.

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