“虹吸比重瓶”测定粘性土粒度成份方法的研究     

孙愫文  沈孝宇  王伯桢 《地球科学》1985,(1)

“虹吸比重瓶” 测定粘性土粒度成份的方法,是我院已故副教授张忠胤于1959年,将移液管法测定粘性土粘度成份的原理,与比重瓶蒸馏水法测定土粒比重的原理相结合,创立了本法的原理与方法。我们在原有基础上作了改进设计。文中叙述了该法的原理和优点,通过17组试样的对比试验资料,用相关分析与回归分析,论证了该法的精确性。  相似文献   

Anisotropy of magnetic susceptibility of rocks in the Rayleigh Law region: Modelling errors arising from linear fit to non-linear data     

F. Hrouda 《Studia Geophysica et Geodaetica》2007,51(3):423-438

The anisotropy of magnetic susceptibility (AMS) within the Rayleigh Law range was investigated theoretically, using mathematical modelling. It was revealed that the orientations of the principal susceptibilities and the shape parameter vary with field so weakly that these variations can be regarded as negligible from the practical point of view. The degree of AMS increases with field according to the degree of anisotropy of the initial susceptibility used and according to the intensity of susceptibility change with field of the mineral considered. The degree of AMS calculated using linear theory is very near to the degree of AMS following from the analysis of AMS within the Rayleigh Law range. If it is desirable to correct the field-dependent degree of AMS, a simple technique is suggested based on measurement of the AMS in two fields. fhrouda@agico.cz  相似文献   

Bio-logging of marine migratory species in the law of the sea     

《Marine Policy》2015

The use of advanced and emerging remote data-collection technologies, and in particular bio-logging of marine migratory species, raises fundamental questions about the scope of authority of coastal states to regulate marine scientific research in the waters under their jurisdiction. Bio-logging involves the attachment of devices to marine animals that collect and transmit data about their movements and aspects of the local marine environment, and is now routinely used by marine scientists to support conservation programs and augment oceanographic data collection. Tagged marine life, including seabirds, marine mammals, sea turtles and pelagic fishes, may interact unpredictably with the territorial seas and exclusive economic zones (EEZs) of numerous coastal states. This article explores the legal implications of bio-logging within the legal regime of marine scientific research in the law of the sea. Although bio-logging is a form of marine scientific research, when it is initiated outside a coastal state׳s jurisdiction it does not later fall within it, even if the tagged animals subsequently enters a coastal state׳s territorial sea or EEZ.  相似文献   

Bio-logging as marine scientific research under the law of the sea: A commentary responding to James Kraska,Guillermo Ortuño Crespo,David W. Johnston,bio-logging of marine migratory species in the law of the sea,Marine Policy 51 (2015) 394–400     

《Marine Policy》2015

Rapid advances in attaching miniaturized electronic devices to marine animals for the purpose of learning more about their behavior and interaction with the marine environment, known as bio-logging, raise important and unsettled questions under the international law of the sea. Part XIII of the United Nations Convention on the Law of the Sea (UNCLOS) provides coastal states with the right to regulate and authorize marine scientific research in offshore areas under their sovereignty and jurisdiction. In their recent article published in this journal, James Kraska, Guillermo Ortuño, and David W. Johnston, assert that although bio-logging is a form of marine scientific research, Part XIII of UNCLOS does not apply to tagged animals that collect scientific information within a coastal state’s 200 mile exclusive economic zone, territorial sea, or internal waters. This commentary rejects Kraska et al.'s interpretation and provides evidence to support the claim that coastal state consent under Part XIII of UNCLOS may, under some circumstances, apply to bio-logging. In light of the immense scientific contributions that bio-logging research provide to global marine conservation efforts and the possible burdens that may be imposed on researchers if coastal states begin to assert their rights under UNCLOS, it is important that the international community engage in a robust and candid discussion of the issue and develop a consensus-based approach on how best to move forward.  相似文献   

Ship source oil pollution damage: A Canadian perspective on recoverability of economic losses and damage to the marine environment     

Deana Silverstone 《Marine Policy》1985,9(2):108-119

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Explaining exclusive fishery jurisdiction     

Tullio Scovazzi 《Marine Policy》1985,9(2):120-125

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Thailand and the 1982 law of the sea convention     

Ted L. McDorman 《Marine Policy》1985,9(4):292-309

This article considers Thailand's problems with the 1982 LOS Convention, especially the exclusive economic zones. Despite the disadvantages, it recommends that Thailand should ratify the Convention.  相似文献   

Energy saving device of stator for marine propellers     

F. elik  M. Güner 《Ocean Engineering》2007,34(5-6):850-855

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An economic analysis of illegal, unreported and unregulated (IUU) fishing: Key drivers and possible solutions   总被引：4，自引：0，他引：4  

Bertrand Le Gallic  Anthony Cox   《Marine Policy》2006,30(6):689-695

The fight against illegal, unreported and unregulated (IUU) fishing activities has recently become a high priority in the international fisheries management agenda. While a number of academic contributions have sought to improve the understanding of the problem, most remain limited in scope. To help policy makers obtain a more comprehensive picture of the situation, the OECD Committee for Fisheries recently completed a study addressing the full economic dimensions of IUU fishing in an integrated manner. This paper presents the analytical framework developed by the OECD as well as some of the key results of the study regarding the causes of and the potential solutions to this widespread problem.  相似文献   

Towards a market-oriented management model for straddling fish stocks     

Torbjorn Trondsen  Thorolfur Matthiasson  James A Young 《Marine Policy》2006

Management of straddling fish stocks has been noted for its political complexity. Negotiations frequently falter as each party seeks to focus upon their own individual and shorter-term goals than the collective interest of the sector. Entrenched positions are often only deepened as new entrants participate to establish their own claims to any emergent share of resource. Unsurprisingly, deadlocks are common and typically compromises are reached only after the real period of biological then economic crisis has passed. Examples to illustrate this tendency can be found in most of the world's oceans and is writ large within the current impasse over blue whiting (Micromesistius poutassou) in the North Atlantic. The development of this fishery is discussed and it is shown that despite the scope to add value to the resource base through a pattern of exploitation focussed more upon human consumption than fish meal and oil, there seems little incentive to extricate participants from the cycle of demise that has engulfed negotiations so far.  相似文献