Shipwrecks on Roncador Cay,the Caribbean Sea and Their Relationship with Hurricanes, 1492-1920

International Journal of Historical Archaeology - Previous studies suggest that tropical storms and hurricanes are among the leading causes of shipwrecks in the Caribbean Sea since 1492. This paper...     

SPATIAL ECONOMIC INTERDEPENDENCE IN AN URBAN HIERARCHY SYSTEM

ABSTRACT. This paper develops a model to examine the economic interaction between central places and their hinterlands. The model allows interindustry linkages and upward trade flows in an urban hierarchy system. Trade balance equilibrium between hierarchical levels is established by direct mutual interlevel trade, rather than by indirect trade via the rural sector. The economic base multipliers generally increase with city size but occasionally they could be smaller than those of lower places. A continuous urban hierarchy is formed due to their relative location within the system, not to unspecified randomness.     

Different historical trajectories and family diversity among Chinese, Japanese, and Koreans in the United States

Chinese, Japanese, and Korean American families in the United States share several similarities, but they should not be interpreted as the sameness. Each group has gone through different immigration trajectories, and family members in a group have had different experiences. To get further knowledge of different family experiences in contemporary U.S. society, the trajectories of the family relationships among different Asian ethnic groups are examined. We specifically look at the time from arrival to World War II, from World War II to the 1960s, and after the 1960s.     

Seismic Displacement Demands on Skewed Bridge Decks Supported on Elastomeric Bearings

The unseating of decks is one of the most prevalent failure modes of bridges after earthquake events, as observed in the 2010 Chile Earthquake. Damaged bridges in Chile often had skew angles and were supported on elastomeric bearings. Similar bridge construction practices with decks supported on elastomeric bearings are also common in the central and eastern U.S. (CEUS). The seismic displacement demands on skewed bridges are more complicated than those on bridges without skew angles due to the coupling of translational modes with the rotational mode of vibration. The study presented in this article seeks to understand the seismic response of skewed bridge decks supported on elastomeric bearings. The scope of the study is limited to one- and two-span bridges, which constitute a large portion of bridge inventory in the CEUS. The vibration modes of skewed bridge decks are derived in closed form and the modes are compared when the gaps between the bridge deck and the abutment are open and when one of the gaps is closed due to seismic excitation. Nonlinear response history analyses are carried out to understand the effects of vertical ground motion, skew angles, aspect ratios, and different ground motion types on the seismic displacement demand in these cases. Amplification factors that approximate the increase in the displacement demand due to the skew angle are proposed.     

North Korea and Zimbabwe, 1978–1982: from the strategic alliance to the symbolic comradeship between Kim Il Sung and Robert Mugabe

This article provides an explanation for North Korea-Zimbabwe bilateral relations from the late 1970s to the early 1980s, in the context of Cold War in the Third World. Supporting the military resistance of African nations, North Korea sought to gain its dominance over South Korea in the diplomatic war between the two Koreas. North Korea contributed to the liberation of Zimbabwe and helped Robert Mugabe establish his political foundations in the country. However, North Korea’s political gain from Zimbabwe was less than it expected and hence did not make any significant changes in its competition with South Korea.     

The politics of the Shanghai courts: the state,local elites,and social networks in Nationalist China, 1927–1937

This article explores the ways in which the Nationalist Party established dominance over the Shanghai courts in the foreign concession area to use them as weapons against political dissidents, and it analyzes the intricate relations among the Nationalist Party, local elites, and the Shanghai courts during the Nanjing decade (1927–1937). Building on recent studies that pay attention to the limited success of the Nationalist Party’s policy of putting the judiciary under Party control, this study demonstrates that the process of establishing the Nationalist Party’s dominance over the Shanghai courts was highly contested. The interplay between the Nationalist Party’s effort to gain control over the Shanghai courts by building formal and informal institutions and the local elites’ appropriation of their own social networks rendered the Shanghai courts vulnerable not only to the Party’s intervention, but also to the influence of social forces. I argue that due to the weak authority of the Shanghai courts, the Nationalist Party’s use of law against political foes could be a double-edged sword.     

Community-based legislative representation and postcolonial ethnic civil warfare in former British and French colonies

Recent research argued that the colonial policy of community-based representation in the legislative assembly strongly increases the risk of postcolonial ethnic warfare in former British and French colonies. This paper delves deeper into the relationship by using an updated dataset that codes the receipt or non-receipt of communal representation for nearly all ethnic groups in former British and French colonies. The results confirm the war-inducing effect of this communalising colonial policy and additionally find that such an effect applies relatively uniformly to groups that benefited from this policy as well as those that were excluded from it. In addition, based on sociological theory and previous research, it was hypothesised that a combination of precolonial receipt of communal legislative representation and postcolonial political exclusion would make an ethnic group particularly prone to postcolonial ethnic warfare. This hypothesis, however, was not supported by the data. This null result has theoretical implications for our understanding of the conditions that give rise to conflict-inducing psychological strain in the field of colonialism and ethnic warfare.     

SOLVING A THREE-DIMENSIONAL URBAN ACTIVITY MODEL OF LAND USE INTENSITY AND TRANSPORT CONGESTION*

ABSTRACT Recent developments in combining input-output and transportation planning models have made it possible to construct realistic comprehensive urban and regional activity models of land use intensity. These models form the basis for a rigorous approach to studying the interactions among urban activities. However, efficient computational solution methods for implementing such comprehensive models are still not available. In this paper, an efficient solution method for a nonlinear programming urban systems model is developed by combining Evans's partial linearization technique with Powell's hybrid method. The solution algorithm is applied to a small but realistic urban area with a detailed transportation network.     

New age constraints for hominid footprints found on Jeju Island,South Korea

In 2004 numerous hominid footprints, along with diverse animal footprints, were found in the Late Quaternary strata of Jeju Island, South Korea. However, the age of the sediments in which the footprints were found is still controversial. Previous age estimates included radiocarbon ages of ca. 15,000 yr BP (Late Pleistocene) and quartz optically stimulated luminescence ages of ca. 7000 yr BP (mid-Holocene). In this study we report on 11 AMS ¹⁴C dating results from a new set of samples collected from the footprint-bearing strata and from associated sediments. Despite some variations and age reversal, all samples collected from the footprint-bearing strata yielded ¹⁴C ages of late Pleistocene. These ages are comparable with previous radiocarbon dating results. Furthermore, the presence of the proboscidean footprints attributable to woolly mammoths in the footprint-bearing strata supports the radiocarbon dating results. Based on the new radiocarbon dates and the presence of the alleged mammoth footprints, the age of the hominid footprints found at Jeju Island is thought to be late Pleistocene (about 19,000–25,000 cal yr BP). Therefore, this is the second discovery of hominid footprints dated to the Pleistocene age in Asia, and the first to be discovered in Korea.