Review: The Fur Trade Gamble: North West Company on the Pacific Slope, 1800–1820 by Lloyd Keith and John C. Jackson

Cable tensile forces in winch-assist harvesting have been investigated in order to assess the safety concerns of the technology. However, the literature is lacking, particularly in regards to the impact of winch design. In this study, a Summit Winch Assist tethering a feller-director on ground slopes up to 77% was monitored for four days. The cable tensile forces were simultaneously recorded at the harvesting and anchor machine at a frequency of 100 Hz. Cameras and GNSS devices enabled a time study of the operations and the recording of machine positions. Winch functionality and design were disclosed by the manufacturer and used for the interpretation of the results. The cable tensile forces reached 296 kN at the harvesting machine and 260 kN at the anchor machine. The slow negotiation of obstacles while moving downhill recorded the highest peaks, mainly due to threshold settings of the winch in the brake system activation. Lower but significant peaks were also recorded during stationary work tasks. The peaks, however, were limited to a few events and never exceeded the endurance limit of the cable. Overall, the study confirmed recent findings in cable tensile force analysis of active winch-assist operations and provided evidence of the underlaying mechanisms that contribute to cable tensile forces.

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Twenty Years on the Pacific Slope: Letters of Henry Eno from California and Nevada, 1848-1871

The American Historical Review ◽

10.2307/1848768 ◽

1966 ◽

Vol 71 (4) ◽

pp. 1443

Author(s):

John E. Sunder ◽

Turrentine Jackson

Keyword(s):

The Pacific ◽

Pacific Slope

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Proceedings of the Seventh Annual Meeting of the Pacific Slope Branch of the American Association of Economic Entomologists

Journal of Economic Entomology ◽

10.1093/jee/15.6.387 ◽

1922 ◽

Vol 15 (6) ◽

pp. 387-387

Keyword(s):

Annual Meeting ◽

American Association ◽

The Pacific ◽

Pacific Slope

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New species of Calathea (Marantaceae) endemic to Costa Rica

Canadian Journal of Botany ◽

10.1139/b97-848 ◽

1997 ◽

Vol 75 (8) ◽

pp. 1356-1362 ◽

Cited By ~ 4

Author(s):

Helen Kennedy

Keyword(s):

New Species ◽

Costa Rica ◽

Key Words ◽

Osa Peninsula ◽

The Pacific ◽

Pacific Slope ◽

Cordillera De Talamanca

Calathea hylaeanthoides Kennedy, Calathea retroflexa Kennedy, and Calathea incompta Kennedy are described as new. All three species are endemic to Costa Rica. Calathea hylaeanthoides and C. incompta are from the Osa Peninsula, while C. retroflexa is from midelevation on the Pacific slope of the Cordillera de Talamanca. Calathea hylaeanthoides belongs to Calathea section Breviscapus, C. retroflexa belongs to Calathea section Calathea, and C. incompta belongs to the "Ornata group" of Calathea. Key words: Marantaceae, Calathea, Costa Rica, endemism.

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