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Palestinian suicide terrorism has been a key feature in the latest phase of the Israeli–Palestinian conflict. During the past decade, and particularly since September 2000, there has been a substantial increase in the use of this type of warfare. Recent studies suggest that, contrary to common belief, suicide terrorism is highly rational and driven by strategic considerations. This article explores the rationality of Palestinian suicide terrorism from a geographical perspective. It is argued that suicide terrorism works along two parallel paths: rationality and randomness. It complies with geographical fundamentals, and target selection is highly rational, subject to spatial considerations such as distance, agglomeration, and accessibility. As the permeability to Israel became more difficult, suicide bombers and their organizers had to adopt more flexible practices which emphasized other spatial considerations. Timing is of importance both for strategic and tactical reasoning. Obstructing negotiations and peace talks has been a salient objective, but the exact timing of suicide bombings has been influenced by tactical considerations, which aim at maximizing casualties. 相似文献
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The objective of this study was to examine whether dissolved inorganic phosphate (DIP) is removed from the Eastern Mediterranean Sea by adhering to atmospherically deposited loess particles sinking through the water column. In a series of radiolable experiments, loess from the Negev Desert, treated in various ways, was added to surface (SSW) and deep (DSW) seawater spiked with 32PO4−3. It was shown that when fresh loess reaches the Mediterranean SSW approximately 1.3 μmol P/g are released (11% of the total P concentration). Biological activity and inorganic particles removed similar amounts of the tracer (30–40%) from SSW. It was estimated that about 0.2 μmol P/g of ‘aged loess' (proxy of particles sinking into DSW), were removed from poisoned SSW and DSW, while there was minor adsorption when either nothing or quartz powder was added. The adsorbed DIP accounts for approximately 15% of the released P and is equivalent to about 2% of the remaining P (11.17 μmol P/g loess). Therefore, the process of DIP removal by atmospherically derived particles exists, but due to the higher release of P, the result is a net addition of dissolved atmospheric phosphorus in seawater. It is postulated that in actual SSW where dust concentrations are much lower, biological uptake out-competes inorganic adsorption, although it was demonstrated that the decrease in loess particle concentrations tends to increase their adsorption capacity. As the loess descends into the DSW it continues to remove DIP and thus transports phosphate from the water column to the sediments. A preliminary quantitative estimate suggests that the process of DIP removal by loess particles cannot explain the phosphate ‘deficit' in the Eastern Mediterranean DSW characterized by unusually high DIN/DIP ratios (27) reported by others. 相似文献
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Nurit Hildebrand-Mittlefehldt 《Tectonophysics》1980,64(3-4)
In a previous paper, the strain field in the vicinity of the termination of an experimentally induced fault in clay was described. The present study deals with the strain field associated with the termination of a natural normal fault, and a comparison of the two is made.Samples were taken near the termination of a steeply dipping fault in the Green River Formation, Utah. The preferred orientation of basal planes of clay minerals was measured at 80 points in a three-dimensional array, using an X-ray pole-figure goniometer. From the preferred orientation data, strain was calculated according to the theory of March (1932). Strain remote from the fault, due to compaction alone, was determined bed by bed and subtracted from the strain observed near the fault. In this way the finite strain, presumably associated with faulting only, was determined.The displacement field was found by unstraining and superposing the unstrained and strained configurations. The displacement field, patterns of magnitudes of the second invariant of the strain tensor (being a measure of the shear strain), and those of the principal strains were found. They resemble analogous fields and patterns near strike-slip faults observed in experiments, deduced theoretically, and inferred from field observations on active natural faults, after coordinates are rotated so as to bring the fault planes and slip directions into coincidence. 相似文献
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Efrat Shoham-Frider Dan Kerem Mia Roditi-Elasar Oz Goffman Danny Morick Olga Yoffe Nurit Kress 《Marine pollution bulletin》2014
In this paper we present the concentrations of Hg, Cd, Se, Pb, Cu, Mn, Zn and Fe in organs of 6 non-common specimens of cetaceans that were stranded along the Israeli Mediterranean coast (IMC), during 2002–2010: two fin whales, one minke whale, one Cuvier’s beaked whale, one rough-toothed dolphin, and one Risso’s dolphin. Most of the specimens were calves stranded by accident. Concentrations of Hg and Cd were low in tissues of the baleen whales and higher in the toothed whales, with maximum concentrations of 1067 mg kg−1 Hg in the liver of the Risso’s dolphin and 29 mg kg−1 Cd in the kidney of the Cuvier’s beaked whale. As far as we are aware, this is the first report of trace elements in baleen whales in the Eastern Mediterranean, and the first report of trace elements in minke whale and rough-toothed dolphin in the Mediterranean. 相似文献
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Abstract An objective scheme for forecasting frost is derived using scatter diagrams of meteorological parameters observed at 20 h local time at a station in the western Jezreel Valley of Zsrael. Verifîcation based on independent data was highly consistent with probabilities of frost versus no‐frost predicted by the suggested procedure. 相似文献
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Barak Herut Hava Hornung Michael D. Krom Nurit Kress Yuval Cohen 《Marine pollution bulletin》1993,26(12):675-682
Concentrations of mercury, lead, copper, zinc, cadmium, iron and aluminium were recorded in coastal and river mouths surficial sediments, collected along the Mediterranean coast of Israel, during 1988–1991. The levels of trace metal concentrations when normalized against Fe concentration (trace metal/iron ratios) indicated no contamination at most of the stations along the coast. Enrichment of Hg, Cu, Zn and Cd attributed to land-based point sources of pollution, was found in the estuaries of the Kishon and Yarkon rivers. The normalized Pb, Cu and Zn data showed a trend of increasing values from the south toward the north. This S-N trend could be a result of three processes which may be occurring simultaneously: progressive mixing between sediment with a low trace metal/iron ratio in the south, which probably represents a single source derived from the Nile region with (a) non-point source input of pollutants by atmospheric transport, or (b) with point sources of pollutants introduced by rivers and streams, or (c) a natural change in the mineralogy of the sediments along the coast with a relative increase in the trace metals or a decrease in iron as one progresses further north. The relative importance of these three possible processes remains to be established. 相似文献
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The concept of sustainability includes a personal and societal imperative to assume responsibility for the future outcomes of present actions, to look forward, or in other words, to have a future orientation. Future orientation is both a personality trait and a cultural characteristic that strongly influences behavioral decisions on the personal and societal levels, respectively. This research addresses the relationship between future orientation and pro-environmental behavior on both levels. In a representative sample of the population (n = 1216), we found that individuals with developed future orientation demonstrated more pro-environmental tendencies. On the cross-cultural level we also found that in countries that conduct future-oriented practices in general the environment benefits, because the citizens tend to behave more pro-environmentally. The parallel between factors that affect future orientation and environmental behavior and the implications for promoting pro-environmental practices in the social and personal levels are discussed. 相似文献
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The purpose of this paper is to describe, characterise and analyse the behavioural characteristics of Christian pilgrims to holy sites in the Holy Land at the present time. The method of research used in this study was based on one hundred questionnaires, which the pilgrims themselves were asked to complete. The conclusion is that a scale exists upon which the tourist-behavioural features characterising present-day Christian pilgrims can be rated. This scale covers their world-view which ranks the importance of holy sites and the pilgrims' lack of interest in tourism per se. It was found that behavioural factors are related to the pilgrims' perception of holy sites in general and those in Israel in particular. The scale can be described as secularism versus sacredness and tourism versus pilgrimage. The typology is important because it allows us to classify and create other typologies and also to analyse the subject for practical purposes. Additionally, the survey highlights the increasing convergence of old-fashioned pilgrimage and tourism, which have much in common. 相似文献