Leibniz and the Environment

On the Performance of Tree-Based Antennas for SLF-VLF Signal Reception

“…For the standard reference (L = 15 ft) configurations considered in Section III, most of the contribution to R ant is from R rod , R ground , and R tree , as R rad and R cond are much less than 1 Ω. Specifically, using (14), it can be found that R rod ≈ 324 Ω. The components R ground and R tree can be calculated as discussed above and are shown in Tables 4 and 5, respectively.…”

“…Over the years, other researchers have investigated the idea of exploiting trees-and vegetation in general-as means to improve radio communications, though this subject area is not one that is extensively studied. Documented efforts in the open literature, for example, have claimed that a toroidal wire spiral, acting as an electromagnetic coupler, when wrapped around a tree, can outperform the conventional whip radiator in a tropical jungle environment [9]- [11]; as demonstrated in [12], even shrubs, behaving similarly to capacitively loaded T-dipoles, can be employed as transceiver antennas over the cellular bands; and, in the amateur radio community, anecdotal claims have been made that pine trees can be effective VLF antennas [13], and even that a communication link via sky waves can be established over thousands of miles by connecting an impedance-matched 15 ft to 20 ft grounded wire to a tree [14].…”

“…FIGURE 1. Diagram of experimental setup, as inspired by[7],[14]. The electrical constitutive parameters of the ground are characterized by relative dielectric constant rg and conductivity σg.…”

Theoria cum praxi

“…1 Following some introductory remarks on Leibnizian harmony and his proposed strategies for the restoration of harmony through the resolution of conflicts, sections I and II consider Leibniz's theoretical studies on language and conceptual analysis and their role within Leibniz's efforts to foster European-Chinese cultural exchange. Leibniz was convinced that 1 The full potential of Leibniz's philosophy for environmental thought and policy has yet to be fully explored, but see Merchant (1980, 279-83); O'Briant (1980), Shirkova-Tuiat (1998), Phemister (2001Phemister ( , 2003Phemister ( , and 2016.…”

Kant’s Pre-critical Ontology and Environmental Philosophy

“…1 For environmental readings from Spinoza to Heidegger, see Naess (1977), Zimmerman (1983), Benton (1996), Parkes (2013), Rentmeester (2016), Phemister (2016), andStephano (2017). 2 See Hoff (1983), Rolston III (1988), Regan (2004), Jamieson (2007), and Singer (2009).…”