THE ARCHAEOINTENSITY OF THE EARTH'S MAGNETIC FIELD RETRIEVED FROM PAMPEAN CERAMICS (SOUTH AMERICA)

Absolute intensity determinations using the Coe variant of the Thellier method have been carried out on some selected pottery fragments collected in the wetlands of the lower Paraná (Pampean region, Argentina) in order to construct the first archaeointensity master curve for South America. Associated radiometric ages range between 1640 ± 70 and 730 ± 70 bp . Twenty‐one samples (five fragments) out of 46 studied (eight fragments) provided successful absolute intensity determinations. The fragment‐mean archaeointensity values obtained in this study range from 21.9 ± 2.3 to 42.6 ± 5.4 μT, with corresponding virtual axial dipole moments (VADMs) ranging from 4.0 ± 0.5 to 8.1 ± 1.0 x 10²²Am². This corresponds to a mean VADM of (6.4 ± 1.8) × 10²² Am². The synthetic record retrieved from southern Argentina and Brazil consists of 17 mean archaeointensities distributed between approximately ad 700 and ad 1700. The data set shows several distinct periods of fluctuations of quite large intensity. However, most data are concentrated into a relatively narrow time period from ad 950 to ad 1300. Three general features may be detected: the time intervals from about ad 950 to 1130 and 1350 to 1480 are characterized by quite monotonic increases of geomagnetic intensity, while some decrease is observed from ad 1150 to 1280. These variations may be speculatively correlated to climate changes over multi‐decadal time scales. Important differences are observed between the data and the geomagnetic field predictions derived from recently reported global models, which reinforces the importance of regional reference curves for dating purposes.     

INTENSITY OF THE GEOMAGNETIC FIELD IN THE UKRAINE AND MOLDAVIA DURING THE PAST 6000 YEARS

Archaeomagnetic intensity measurements are reported for 200 leaked clay samples taken from bricks, pottery kilns, furnaces and hearths, etc.     

4. THE MATERIAL PRESENCE OF THE PAST

This article deals with the material presence of the past and the recent call in the human sciences for a “return to things.” This renewed interest in things signals a rejection of constructivism and textualism and the longing for what is “real,” where “regaining” the object is conceived as a means for re‐establishing contact with reality. In the context of this turn, we might wish to reconsider the (ontological) status of relics of the past and their function in mediating relations between the organic and the inorganic, between people and things, and among various kinds of things themselves for reconceptualizing the study of the past. I argue that the future will depend on whether and how various scholars interested in the past manage to modify their understanding of the material remnants of the past, that is, things as well as human, animal, and plant remains. In discussing this problem I will refer to Martin heidegger's distinction between an object and a thing, to bruno latour's idea of the agency of things and object‐oriented democracy, and to Don Ihde's material hermeneutics. To illustrate my argument I will focus on some examples of the ambivalent status of the disappeared person (dead or alive) in argentina, which resists the oppositional structure of present versus absent. In this context, the disappeared body is a paradigm of the past itself, which is both continuous with the present and discontinuous from it, which simultaneously is and is not. Since there are no adequate terms to analyze the “contradictory” or anomalous status of the present‐absent dichotomy, I look for them outside the binary oppositions conventionally used to conceptualize the present‐absent relationship in our thinking about the past. for this purpose I employ Algirdas Julien Greimas's semiotic square.     

《鸟网》展翅腾飞——从《鸟网》年会看《鸟网》变化

<正>2010年《鸟网》年会已结束半月有余,但,每当看到鸟友们在年会《在线播报》专栏中跟发的精彩花絮,情景历历在目,记忆一次次加深。高端论坛会上,聆听文科总版主的精彩讲话和几位特邀嘉宾的主旨演讲,以及鸟友们谈论的话题,心有所感,忆起点点滴滴,真切地感受到了《鸟网》5年来发生的深刻变化。     

THE FORMATION OF THE INDUSTRIAL COMPLEX OF THE KURSK MAGNETIC ANOMALY

The industrial complex in the area of the vast iron-ore bearing province known as the Kursk Magnetic Anomaly (Central Russia) has been shaped in the past by an advantageous economic-geographic situation in the heart of the European USSR, by the availability of labor resources and by the presence of a wide range of agricultural raw materials for industry (sugar beets, sunflower, hemp). Further development will hinge on the massive use of mineral resources, both iron ore for the iron and steel industry, and cement materials in the overburden of open-pit iron mines. In 1975 the KMA will supply one-sixth of all the iron ore mined in the Soviet Union. About 60 percent of the ore (direct-shipping ore and concentrates derived from low grade-quartzites) moves to nearby plants at Lipetsk and Tula, and 25 percent moves to the Urals. If plans for a 12-million-ton integrated iron and steel plant for the Comecon countries materialize, 40 percent of the ore will be consumed locally, still leaving 60 percent for shipment to other steel plants. See also Soviet Geography, November 1974, pp. 593–94.     

THE LIVING PAST

It is argued that although this book will be of interest to any scholar interested in Croce, Gentile, or de Ruggiero, it will be of particular interest to those interested in R. G. Collingwood, for the ultimate focus of the book is upon Collingwood's philosophy and how it developed in relation to the work of the Italian idealists. This is a subject that has not previously been investigated in any depth. Peters argues that the basic idea that unites all four philosophers is that “the past is not dead, but living”; but what distinguishes Collingwood's philosophy from the Italians' is the idea, and its justification, that “the past can live on even if we are not aware of it.” Collingwood explored and developed this idea in reaction to the “presentism” of the Italians, a position that is most obvious in the philosophy of Gentile but that is also to be found, albeit less obviously, in the philosophies of Croce and de Ruggiero. Without casting doubt upon the influence of the Italian idealists on Collingwood, it is suggested in this review that, as well as explaining that influence, Peters's book also throws Collingwood's similarities with Oakeshott into relief; by contrast with Collingwood, there is no evidence that Oakeshott ever read the Italian idealists.     

OBJECTS OF HISTORY: THE PAST MATERIALIZED1

What is the role of material culture in understanding the past? This review essay explores two principal approaches—the history of museums and antiquities and environmental history—to reflect on their shared investment in historical materialism. It reviews Timothy LeCain's The Matter of History and Peter Miller's History and Its Objects, discussing their perspectives on objects and the writing of history. One important part of this history concerns the relationship of academic historians to the idea of a history museum, curatorial practices, and public history. What kinds of history can we do in a museum, with things, that might not occur without the presence of objects? Why were nineteenth- and early twentieth-century efforts to encourage a close relationship between historical research and the history museum largely abandoned in favor of a document-driven approach? The second dimension of current interest in historical materialism concerns new approaches to environmental history. It draws inspiration from Deep History as well as recent work in archaeology and STS (Science and Technology Studies) to argue for a more integrated history of humans and nature that demonstrates how things have made us. The history of successive efforts to remake the environment in different parts of the world and their consequences offers crucial object lessons in how humans have responded to nature's own creativity. Both approaches to historical materialism highlight the virtues of a more interdisciplinary approach to historical scholarship, in the museum or in the field, but most important, in our own sensibilities about what it means to think historically with artifacts and to treat them as compelling evidence of a shared history of humanity and nature.     

ARCHAEOMAGNETIC FIELD INTENSITY DURING THE ROMAN PERIOD AT SIWA AND BAHRYN OASIS,EGYPT: IMPLICATIONS FOR THE FIDELITY OF EGYPTIAN ARCHAEOMAGNETIC DATA

A preliminary survey was conducted in Siwa and Bahryn Oasis to test the possible influence of various rock magnetic and experimental constraints on the fidelity of the Egyptian archaeomagnetic field record. Five potsherds from the Roman era, which lasted from 1981 bp to 1555 bp , have been investigated. Archaeologists dated the localities to ～1620 bp . Ten ceramic specimens, two of each potsherd, were subjected to archaeointensity determination, including tests for domain state effects, magnetic anisotropy and magnetic cooling rate dependency. Six successful archaeointensity determinations are obtained from three individual cooling units, revealing an average field value of 37.7 μT for the late Roman period in Siwa and Bahryn oasis, which is comparable to the present‐day field strength. The error propagation of the individual uncertainties related to all applied experimental techniques results in a maximum uncertainty estimate of 4.4 μT. The obtained field value is significantly smaller than early results and slightly smaller than some more recent determinations of the field intensity in Egypt. The difference is attributed to a combined effect of alteration, magnetic anisotropy and magnetic cooling rate dependencies. Along with other high‐quality data from the south‐east Mediterranean, our data suggest a field intensity minimum during the Egyptian Roman era.     

CAUSES OF ARAL SEA LEVEL VARIATIONS IN THE PAST

The history of variations of the level of the Aral Sea from the most ancient times is reviewed and much useful information presented on natural regimes of the Aral's tributary rivers, the Amudar'ya and Syrdar'ya; the natural high- and low-water cycles of the Aral; and historical episodes where natural or human events diverted the Amudar'ya's flow westward into Lake Sarykamysh, which served as a kind of “alternative Aral” during these situations. Thus, the present decline of the Aral and growth of Sarykamysh can be viewed as just one cycle (albeit man-modified) of an Amudar'ya-Aral-Sarykamysh drainage system. Translated by Edward Torrey, Alexandria, VA 22308 from: Izvestiya Akademii Nauk SSSR, seriya geograficheskaya, 1990, No. 1, pp. 78-86.     

THE HISTORY OF SEXUALITY: AN ASSESSMENT OF THE STATE OF THE FIELD

In this concise volume, Jeffrey Weeks traces the development of the history of sexuality from its earliest days, more than a century ago, to the present. He identifies dominant themes and subject matter as well as analyzing and commenting upon some of the key theoretical frameworks that have driven this scholarly endeavor. He devotes special attention to LGBT history, to histories of gender, power, and sexuality, and to globalization and the transnational turn in historical writing. He gives attention to the tensions that have often existed between a community‐based activist history produced from within the LGBT community and the history produced within the academy. Finally, he considers the degree to which sexual history has been mainstreamed and the dangers and the value of that process.     

THE VALUE OF HISTORICAL FIELD WORK

Born in Oklahoma City in 1939, educated at George Washington University, the University of Central Oklahoma, and the University of Oklahoma, Baird taught for a decade at the University of Arkansas, Fayettmille, and for another ten years at Oklahoma State University before accepting in 1989 the Howard A. White Professorship of History at Pepperdine University. He and his wife, Jane, are the parents of a daughter and a son. In addition to numerous articles, Baird has published eight books on the history of Native American peoples in Oklahoma and two on the history of medicine in Arkansas. He has been president of the Western History Association and chair of the Oklahoma Foundation for the Humanities. From 1989 to 1991 he served as president of Phi Alpha Theta, whose advisory council he now chairs. Bairds presidential address was delivered in December 1991 at the 70th Anniversary Phi Alpha Theta convention held in Chicago.     

SPACE AND THE MEASUREMENT OF INCOME SEGREGATION

ABSTRACT.  This paper proposes a new spatial ordering index that that can be used to quantify the dependence of a given pattern of income segregation on the spatial arrangement of neighborhoods. Unlike other spatial measures of income segregation proposed in the literature, the spatial ordering index is less sensitive to the presence of outliers, satisfies the "principle of transfers," and is flexible enough to quantify a variety of spatial patterns of segregation. The index can be interpreted in terms of the ratio of two covariances. Properties of the proposed measure are demonstrated using an example from the city of Baltimore, Maryland.