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Collecting Inspiration: Edward C. See more Terjanian, Pierre, ed. Easby, Jr. The Metropolitan Museum of Art Bulletin, v. See more Abramitis, Dorothy H. See more Ainsworth, Maryan W. Waterman with contributions by Timothy B. Husband and Karen E. Centeno, and Peter Klein.

Bayer, Peter J. Boehm, Andrew Bolton, Sheila R. Canby, Iria Candela, John T. Doyle, Maryam Ekhtiar, Douglas S. Eklund, Alyce Englund, Helen C. Hokanson, Melanie Holcomb, Mellissa J. Huber, Timothy B. Lightfoot, Charles T. Dating stone arrowheads, Mark P. Mertens, J. Wolohojian, and Sylvia Yount. Petrus Christus: Renaissance Master of Bruges. See more Ainsworth, Maryan Wynn. See more Allen, Josephine L. Ainsworth, Dirk H. Breiding, George R. See more Arnold, Janet.]

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Instead of functioning as projectiles, this arrowhead focal helps add a rustic or Native American feel to jewelry designs. Use for wire-wrapping or with sinew. Please note arrowhead edges are sharp. The natural pits and imperfections are expected and add to the distinctive beauty. Sizes, shapes, and colors may vary with handcrafted items Write a review Please login or register to review Black Obsidian Moon shaped Carved Arrowheads.

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With the increased interest in solar power comes a development of more efficient and different types of technology to harvest the sun rays. Monofacial panels have been on the market for a long time and have rather developed simulation models. The bifacial technology on the other hand have been researched for years but just recently found its way to the market. Simulation models for the bifacial panels are continuously being developed and they are a key aspect to increase the knowledge about the bifacial technology. Most of the research that has been conducted until today is mainly about the bifacial gain, not about the bifacial simulation models. The purpose of this thesis was to evaluate and validate simulation models of bifacial solar panels in PVsyst with comparisons to measured data from six different bifacial installations in Sweden. The installations had different system configurations and varied in: tilt, azimuth, pitch, elevation, number of rows and albedo. Furthermore, the installation configuration parameters were analyzed to see how they affect the bifacial system and what an optimal configuration would be for a bifacial installation in Sweden. The results show that the main difficulties for an accurate simulation model is to determine the proper input data. dating stone arrowheads