Trimline Trauma: The Wider Implications of a Paradigm Shift in Recognising and Interpreting Glacial Limits

Trimlines mark the boundary between glacially eroded landscapes on low ground and landscapes dominated by evidence of periglacial weathering on higher summits. For many years the trimlines of Scandinavia, Britain and Ireland have been interpreted as marking the surface of the ice sheets at the maximum of the last glaciation, but recent cosmogenic exposure dating of erratics far above the trimlines in NW Scotland shows this to be false. The trimlines in that area must represent an englacial thermal boundary between warm (eroding) ice and cold (protecting) ice. It is now clear that even very experienced geomorphologists cannot necessarily tell the difference between terrain that has been recently glaciated and terrain that has not, because cold-based ice can leave virtually no trace. This calls into question not only the interpretation of high-level trimlines elsewhere, but also the mapping of the lateral limits of past glaciations, which are often based on similar or even weaker geomorphological and sedimentological evidence.     

Competitive Multifacility Location on Networks: the (r∣Xp)‐Medianoid Problem

Abstract.  We investigate the ( r ∣ X _p )‐medianoid problem for networks. This is a competitive location problem that consists of determining the locations of r facilities belonging to a firm in order to maximize its market share in a space where a competitor is already operating with p facilities. We consider six scenarios resulting from the combination of three customer choice rules (binary, partially binary, and proportional) with two types of services (essential and unessential).
Known discretization results about the existence of a solution for the set of nodes are extended. Some examples and computational experience using heuristic algorithms are presented.     

Interview with Village Leaders (I): Political, Legal and Public Services: in Rural Tibet

The Tibetan Areas Development Study Group of theCAS, led by research fellow Wan Luolin (who is thehead of the CAS Learning Advisory Committee andoriginal administrative vice president) and researchfellow Zhu Ling (deputy director of CAS Economic ResearchInstitute), developed the extensive research activities in theTibetan-inhabited areas since 2000. While the study groupcompleted the special subject policy report, it also published somelearning achievements such as Choice of Roads to…     

Interview with Village Leaders (II):Political Legal and Public Services in Rural Tibet

Soinam Wozhub: Old Village Head Who Has Worries Temtog(them-thog) Town of Zugong County is famous in the area along the Sichuan-Tibet Highway largely because it contains the ancient Zugong(mdzo- sgang) Monastery. The presence of the monastery first attracted many visitors and gradually helped to create a local community and market. The government of Zugong County operated in the village before the peaceful liberation of Tibet in 1951. While the Tibetan Areas Development Study Group o…     

Interview with Village Leaders(III):Political,Legal and Public Services in Rural Tibet

Village Head Nyima Cering Ready to Leave His Office Omda is a village within the jurisdiction of Chewei Township of Qamdo County, lying some 80 km from Qamdo Town, the county headquarters. About 40 km to the north of Omda Village is Garma Monastery of the Garma Gagyu Sect, famous for its Buddhist images and     

Interview with Village Leaders(III):Political,Legal and Public Services in Rural Tibet

Village Head Nyima Cering Ready to Leave His Office Omda is a village within the jurisdiction of Chewei Township of Qamdo County, lying some 80 km from Qamdo Town, the county headquarters. About 40 km to the north of Omda Village is Garma Monastery of the Garma Gagyu Sect, famous for its Buddhist images and     

Interview With Village Leaders (IV):Political,Legal and Public Services in Rural Tibet

Sainted Naxi ethnic group village head Gongqoi Zhaxi Located at southeast corner of Tibet, Yanjin (tsha-kha)is close to Yunnan Province. It is a well- known place in Tibet for several reasons. First, this place produces well salt differing from the lake salt in northern Tibet. The salt produced here is formed by isolating salty water fetched from wells beside the Lancangjiang River in salt ponds. Second, in Yanjin, there is a unique Catholic church, and there are many Tibetan people who …