STABLE ECONOMIC AGGLOMERATION PATTERNS IN TWO DIMENSIONS: BEYOND THE SCOPE OF CENTRAL PLACE THEORY

This paper elucidates which agglomeration patterns exist in two‐dimensional economic space and how such patterns appear stably. Hexagonal lattices, that with and that without a boundary, are advanced, respectively, as practical and theoretical spatial platforms of economic activities. Agglomeration patterns on these lattices include hexagons in central place theory, but also encompass megalopolis and racetrack‐shaped decentralization. As the transport cost decreases, stable economic agglomeration undergoes the formation of the smallest hexagon and transition to patterns with larger market areas, often undergoing downtown decay but finally leading to a megalopolis. Formulas for break points are provided in an economic geography model.     

战后日本经济的发展历程

我是京瓷的稻盛和夫。1932年出生于日本南部的鹿儿岛,大学时代专攻化学专业。曾就职于日本的古都京都的一家生产绝缘材料的公司,任技术员。     

Field Measurements and Numerical Simulation of Debris Flows from Dolomite Slopes Destabilized during the 2005 Kashmir Earthquake,Pakistan

A devastating earthquake occurred in Kashmir, Pakistan on October 8, 2005. This earthquake resulted from reactivation of a known active fault later defined as the Balakot–Bagh fault, which caused widespread slope failure throughout its stretch, particularly around Muzaffarabad, the provincial capital of Azad Jammu and Kashmir. This slope failure resulted in a huge amount of debris material which flows in deeply incised creeks during monsoon and hits the inhabitants along the valley in Muzaffarabad. Two GPS measurements are carried out along with channel morphometric parameters and observed changes to investigate the effect of debris flows along these creeks during monsoon. Other than the physical measurements, actual debris flow is simulated using the Depth Average Material Point Method (DAMPM) after carrying out parametric study and calibrating the model for subject topographical and geological settings. The generalized effect of different input parameters of the model on debris flow runout features is studied and discussed in detail. After ensuring validation of the numerical tool, the contribution of a single closed-type check dam to decrease runout intensity to its downstream reach is also investigated for different locations to obtain optimized selection.     

Six Tibetan Translations of the Ratnagotravibhaga

The Ratnagotravibhaga （abbr. RGV） is one of the most influential texts among Indic works that teach the Buddha-nature doctrine in Tibet. No translation of the text seems to have existed in Tibet before the 11th century, inasmuch as no catalogue of the imperial period （the 9th century）,     

从交错地带看社会集团的地域性和文化交流

笔者曾经撰写过一篇有关中国史前社会中心与周边形成的文章,认为新石器时代晚期,由于生存形态的变化,农耕社会产生新的分化,形成农耕型社会和农牧交错型社会。随着地域差别的出现,在华北农耕社会诸地域的统合过程中,从农耕社会分离出来的农牧交错型社会在周边地区出现,代表     

The Earliest cAlid Genealogy for the Safavids: New Evidence for the Pre-dynastic Claim to Sayyid Status

Studies on the pre-dynastic claim of the Safavids to sayyid status suffer from a dearth of primary source materials. Scholars have advanced various conjectures, but it is not yet clear when the Safavids began to promote this claim or indeed when the so-called “official” Musavid genealogy was developed. This study presents a genealogical chart drawn in the third quarter of the fifteenth century (most probably in the 1460s) in Iraq (most likely in Najaf), which records the “official” genealogy in an unequivocal manner. This chart is a valuable document in that it testifies to the circulation of the “official” genealogy some three to four decades before the establishment of the Safavid dynasty. A survey of the studies to date on the question of the pre-dynastic claim is also offered in order to clarify the significance of the chart.     

Early Maya Ritual Practices and Craft Production: Late Middle Preclassic Ritual Deposits Containing Obsidian Artifacts at Ceibal,Guatemala

This article examines Preclassic Maya ritual practices and craft production by means of a study of ritual deposits containing obsidian artifacts dated mostly to the late Middle Preclassic period (700–350 b.c.) at Ceibal, Guatemala. New ritual practices developed at Ceibal during this period, possibly through political interactions and negotiation involving emerging elites and other diverse community members. Common objects in ritual deposits in the public plaza shifted from greenstone celt caches to other artifacts, including those made of obsidian. The inhabitants of Ceibal engaged in various kinds of craft production, including the manufacture of obsidian prismatic blades. They also conducted public rituals in the Central Plaza, depositing exhausted polyhedral obsidian cores and other artifacts with symbolic significance in caches and as offerings in incipient elite burials and interments of sacrificed individuals. These cores clearly demonstrate the use of a sophisticated blade technology. Like greenstone objects, exhausted polyhedral obsidian cores deposited in cruciform arrangements along the east–west axis of the central E-Group plaza were used as symbols and markers of the center and four cardinal directions within the Maya cosmos. Public rituals were important for creating collective identities and for processes of political negotiation within the community. Emerging elites likely came to play an increasingly important role in public rituals as principal performers and organizers, setting the stage for later public events centered on rulers.