Book Review

Africa is said to offer a fruitful field for joint consideration of economic-geographic and ethnic factors. A number of subjects reflecting the relationship between the two aspects are proposed for investigation: the impact of environment factors, particularly resource use, on the process of formation of ethnic communities; the impact of traditional economic activities on ethnic processes; the relationship between ethnic territories and economic regions (some ethnic communities are associated with particular types of economic activities); the relationship between settlement types and urbanization and ethnic processes. A number of economic-geographic techniques, such as the cartographic method and the statistical method, may be applied to ethnogeographic problems.     

The Man-Nature Relationship According to the Data of Historical Geography and Ethnology (Landscape and Ethnos,X)

The establishment of a new ethnos, or ethnic community, is attributed to a burst of energy or an innate drive that enables members of the community to break with past traditions and behavioral patterns and to begin building a new set of values distinguishing the new ethnic group from others. The ethnos is viewed as both a social and a biological phenomenon, with the social aspect represented by the group's relations with other groups and institutions and the biological by the behavior of the ethnos as a biological population. The innate drive exhibited by ethnic groups in the early stage of ethnogenesis is viewed as a biological feature. In general this drive is fostered by the practice of endogamy, but there are situations in which an ethnically mixed community, resulting from exogamy, also generates the energy required to initiate the process of ethnogenesis. Although the existence of the ethnic drive can be demonstrated by reference to history and historical geography, an explanation of this form of energy must be left to genetics and anthropology.     

The Nature Of Ethnic Wholeness (Landscape and Ethnos,XII)

The character of an ethnic whole is analyzed in terms of systems theory. An ethnos is viewed as a closed system in which the initial burst of energy (innate drive) is gradually spent while entropy steadily increases. The system must constantly remove the accumulated entropy by exchanging energy and entropy with the environment. What produces the wholeness of an ethnic system is not the grouping of similar individuals, but the existence of a particular set of relationships between these individuals, giving rise to what may be termed an “ethnic field”. In light of the systems and field concepts, the author argues against defining an ethnic community as a mere social organism distinguished by common language, culture, daily life and mental outlook. Such an approach, in his view, limits the question of ethnic wholeness to the principle of external likeness, without delving into the internal linkages that hold an ethnos together.     

Morning sector electron precipitation events observed by incoherent scatter radar

Two auroral zone electron precipitation events in the morning sector have been studied in detail using the UHF incoherent scatter radar in northern Scandinavia. The electron density profiles are interpreted in terms of the incoming spectrum of energetic electrons, and it is shown that the spectrum is most energetic at the maximum of the event and softens subsequently. The observations cannot be explained by simple gradient-curvature drift of trapped electrons. It is shown, further, that events appearing to be fresh substorms in magnetometer and riometer data may be no more than intensifications of continuing activity. During a pulsation event the incoming electron spectrum was modulated in energy as well as in intensity. The height and thickness of the resulting radio-absorption layers are derived.     

北宋与辽的边疆经略

北宋与辽的边疆经略,主要面向它们辖区的外围地带。北宋长期致力于西北、西部至西南地区的军政管辖,针对这一地区各族治乱、向背问题采取了相应的军政对策和措施。辽朝对东北、北部至西北各族的治乱、向背问题所采取的相应对策和措施,历经一、二百年的艰苦经营,付出了巨大的代价。至于历来为世人瞩目的宋、辽围绕燕云地区展开争战一节,实际上属于两朝的关系领域,故不以一般边事论之。本文通过北宋与辽的边疆经略,揭示其边功业绩同我国统一多民族国家向前发展相关的一些问题。     

The Internal Regularity Of Ethnogenesis (Landscape and Ethnos,XIV)

The author, a Leningrad University ethnologist, completes a series of 14 articles on the relationship between landscape and ethnic communities, and on the forces that account for the rise and decline of ethnic groups through history. After having discussed in the first few articles the relationship between shifts in storm tracks and the fortunes of the steppe peoples of Central Asia, Gumilev developed a theory that attributes the rise, development and decline of an ethnos to the initial burst and gradual waning of an innate ethnic energy or drive. Ethnoses may be grouped into superethnic systems that are identifiable with major culture areas through time and through space (Hellenistic culture, Moslem world, European civilization, Eurasian nomad culture). The author attempts to relate the different phases in the evolution of an ethnos to changing relationships between the group and the individual, as expressed in a series of imperatives, but further analysis of what generates innate ethnic drive is left to other disciplines.     

Notes on the diversity of the properties of radio bursts observed on the nightside of Venus

We report on further studies of radio wave bursts detected by the Orbiting Electric Field Detector (OEFD) on PVO in the nightside ionosphere of Venus. We have tested a total of 25 cases of wave burst activity for evidence of whistler-mode propagation to the spacecraft from impulsive subionospheric sources. As in a previous study of 11 of these cases (Sonwalkar et al., 1991), we find at least two distinct classes of events, one, mostly involving bursts at 100 Hz only, that passes certain tests for whistler-mode propagation, and another, mostly involving bursts in two or more of the four PVO narrowband channels (at 100 Hz, 730 Hz, 5.4 kHz, and 30 kHz), that fails to pass the tests. The subionospheric lightning hypothesis continues to be tenable as a candidate explanation for many of the 100 Hz-only events, but its plausibility could be better evaluated if mechanisms could be found to explain the existence of a significant number of 100 Hz-only cases that do not pass all the applicable whistler-mode tests, as well as the existence at a wide range of altitudes of multichannel cases that are clearly not propagating whistler-mode waves. The wideband bursts are often observed at altitudes above 1000 km and frequently occur in regions of locally reduced electron density. Those observed at high altitude (and possibly at low altitude as well) are believed to be generated near the spacecraft, possibly by an as yet unknown mechanism responsible for similar burst observations made near Earth and other planets.     

Propagation of turbulence structures detected by VHF radar

In the high latitude wintertime mesosphere VHF radar measurements usually reveal several turbulence layers at heights between 65 and 85 km which are closely related to strong vertical wind shear. The turbulence layers are superposed by turbulence bursts, which often form sequences with periods similar to those of simultaneously observed velocity oscillations. The horizontal propagation velocity of the resulting turbulence structures can be obtained by cross-correlating the signal power time series measured at three antenna beam positions. A statistical study using a total of 71 events shows that there is a significant correlation between the propagation velocity of turbulence structures and the mean wind, being consistent with the assumption that turbulence is advected by large scale motions. It is suggested that the observed turbulence bursts are due to secondary static instabilities, which for their part are generated by primary Kelvin-Helmholtz instabilities in regions of strong wind shear.     

Residential Solar Space-Heating Potential Across the United States and Southern Canada

Regions having high solar radiation are often considered to have to greatest potential for the use of solar energy in the space heating of buildings. Areas with severe cold climates and high energy demands are usually overlooked, because of the natural assumption that solar energy cannot be effective there, on its own. Yet, such a simple view may reduce the incentive for implementing solar energy technology in regions where its contribution can be very significant.
In this essay I provide a climatological evaluation of the potential for residential solar space heating across the contiguous United States and southern Canada. For analysis, long-term mean climatological data will be used and certain house and solar collection system characteristics will be assumed and held constant for all locations. Note, however, that the performance of an individual solar system at a specific site requires a detailed simulation model (for example, see Klein et al., 1976) and comprehensive analysis of the solar climate (Hay, 1977). The simplified procedure in this study is intended to serve a broad energy planning purpose, by providing an assessment of the geographical regions where residential solar heating should be most encouraged.     

Interactions between whistler-mode waves and energetic electrons in the coupled system formed by the magnetosphere,ionosphere and atmosphere

The physical mechanism of a cyclotron resonance interaction between trapped energetic electrons and whistler-mode waves in the magnetosphere is discussed. Not only do the electrons have their pitch angles reduced in this interaction, so that they may be precipitated into the upper atmosphere, but also the waves can be amplified. Such a flux of precipitating electrons can, either by direct ionisation or via bremsstrahlung radiation, cause a pimple to be produced on the bottom of the ionosphere. That can significantly modify the amplitude and/or phase of very low frequency radio signals propagating in the Earth-ionosphere waveguide. Various experimental observations that demonstrate the reality of such effects are reviewed. The conditions necessary for a positive feedback situation are discussed, and some evidence for its existence assessed.     

Observations and modelling of ionospheric and thermospheric disturbances during major geomagnetic storms: A review

The thermosphere is primarily energised by the combination of three sources of energy and momentum. Solar UV and EUV energy is absorbed globally on the dayside within the middle and upper thermosphere. There is a persistent, but highly variable, inflow of energy and momentum from the magnetosphere. These magnetospheric inputs are usually confined to high latitudes, except at times of very large geomagnetic disturbances. Tides and gravity waves upwell from their sources in the troposphere and stratosphere to deposit energy and momentum at levels from the middle mesosphere to the upper thermosphere. Solar EUV radiation between 120 ran and 250 nm photo-dissociates the molecules which dominate the composition of the lower thermosphere, in particular producing atomic oxygen which dominates the composition of the upper thermosphere. The combination of solar EUV radiation at wavelengths shorter than 120 nm, plus energetic (mainly) charged particles from the magnetosphere, also ionise the neutral constituents of the thermosphere, creating the ionosphere. Particularly at high latitudes, within the geomagnetic polar caps and auroral ovals, the energetic, dynamical and chemical coupling and interactions between the thermosphere and ionosphere dominate the structural and dynamical response of both the thermosphere and ionosphere to solar and geomagnetic inputs of energy and momentum.Comparisons between predictions using global thermosphere-ionosphere coupled models and comparable observational sets have shown encouraging agreement during periods of relatively quiet geomagnetic activity. This indicates that the major energetic, ionisation, chemical and dynamical processes and interactions can be described in models with reasonable accuracy. During periods of high geomagnetic activity, and particularly during major geomagnetic storms, large rapid disturbances of the thermosphere occur with extremely rapid variations. These disturbances are observed as large increases of temperature, density, major changes of neutral composition, and with the development of high speed wind flows and large amplitude waves which may propagate to affect the entire globe. Since the ionosphere is formed from thermospheric constituents and affected by thermospherc dynamics, the gross disturbances of the ionosphere during highly disturbed periods are related to contemporary changes of density, composition and flows of the thermosphere, as well as changes of ionisation sources and electric fields. Observations which describe the nature and scale of disturbances of the thermosphere during geomagnetic storms will be used, in combination with appropriate global numerical simulations, to aid interpretation of storm-time ionospheric phenomena. The role of energetic, dynamical and chemical coupling between the thermosphere and ionosphere is emphasised.     

A study of the vertical motion field near the high-latitude summer mesopause during MAC/SINE

We present the results of high-resolution observations of the vertical velocity field obtained with the EISCAT and SOUSY VHF radars near the high-latitude summer mesopause during the MAC/SINE campaign in northern Norway in 1987. The data reveal an energetic motion field with maximum amplitudes of ~ 10 m/s and characteristic periods of ~5–30 min. Motions exhibit a high degree of vertical coherence and a quasi-periodic structure, with typical durations of 5–10 cycles. Estimates of the mean vertical velocity are downward at lower levels and are near zero or positive at greater heights. The mean vertical velocity variance is found to be ~5 m²/s², consistent with other high-latitude measurements. Frequency spectra computed for each radar are found to exhibit considerable variability, while vertical wavenumber spectra are seen to be somewhat variable in amplitude and to have slopes approaching −3 at lower wavenumbers. These results are suggestive of an energetic spectrum of gravity wave motions near the mesopause that has a large vertical flux of wave energy, that may have observed wave frequencies differing significantly from intrinsic frequencies due to Doppler shifting by large horizontal winds, and that is consistent with the separability of the frequency and wavenumber dependence of the motion spectrum and with gravity wave saturation at sufficiently small vertical scales.     

Controlled electron beam experiments in space and supporting laboratory experiments: a review

The injection of energetic charged-particle beams in space represents an exciting area for controlled experiments in the Earth's ionosphere and magnetosphere. Under the influence of a multitude of controlling parameters, a mono-energetic charged-particle beam might follow a well-defined singleparticle trajectory or it might undergo collective beam-plasma effects that substantially modify its energy and density distributions. In the latter case, one finds a multitude of possibilities for unstable plasma modes. If on the other hand the beam maintains single-particle characteristics, it can be a useful diagnostic tool for such applications as geomagnetic conjugate mapping and measurement of magneticfield-aligned potentials. The evolution of these concepts, along with the developing technology of spaceborne charged-particle beam accelerators, has ushered in an area of basic plasma and geoplasma physics previously not available to the scientific community. Over the past five years this activity has brought about important improvements in our fundamental understanding of beams and beam plasma processes. This progress has been brought about not by space experiments alone, but by the synergistic efforts of computational physicists, and the exchange of ideas born from laboratory simulations of space plasma processes involving energetic particle beams. It is the aim of this review paper to develop a synoptic perspective on recent accomplishments, and to summarize plans and recommendations for future experiments which will contribute to continued growth in the field.     

Neutral atom precipitation—a review

The production of energetic neutral atoms by charge exchange of ring current ions with neutral hydrogen in the geocorona was predicted many years ago, and there are now a number of measurements of the effect of the impact of these energetic atoms on the thermosphere. Theoretical models of the process have been developed. The latitude variation of the precipitating flux depends very much on the pitch angle distribution of the ions in the ring current, and on the L shell on which they are located.The production of a belt of trapped particles at low altitude near the magnetic equator may occur when neutral atoms re-ionize and become trapped on impacting the thermosphere, and this belt has been found in particle measurements near the equator and is enhanced during periods of magnetic activity.A region of enhanced optical emission due to precipitating neutrals is found in the thermosphere near the magnetic equator in both disturbed and quiet times, implying a low L value and/or pancake pitch angle distribution for the ring current particles that give rise to these neutrals. An isotropic pitch angle distribution is present in parts of the ring current at time during magnetic storms. This gives rise to neutral atom precipitation at all latitudes, and particularly of particles near 90° pitch angle in the region of SAR arc occurrence, about 10° in dip latitude equatorward of the isotropic region.The rate of energy deposition and the rate of production of ionization in the thermosphere depend on the ion species present in the ring current; their energy spectra, and on the distributions of the ions with L value and pitch angle. The rate of energy deposition may at times reach 10⁻² to 10⁻¹ mWm⁻², sufficient for significant heating and wind generation. The rate of production of ionization in the thermosphere at night may be much greater than that of other low latitude night-time ionization sources.     

The Rise of Vo¨lkisch-Nationalism and the Decline of German Liberalism: A Comparison of Liberal Political Cultures in Schleswig-Holstein and Silesia 1912-1924

Historians have tended to focus on political economic and political organisational factors in order to explain the rise of liberalism in the nineteenth century and the decline of liberalism in the twentieth. But these factors tell only part of the story, particularly in the German case. For the precipitous decline of German liberalism after 1890 cannot be understood without examining the rise of Austro-German völkisch (ethnic) nationalism in the same period. Comparing Germany's two most liberal regions, Schleswig-Holstein and Silesia, this article argues that liberalism became increasingly dependent for its political survival on an accomodation with ethnic nationalism. It is hoped that such a comparison will lead to a reexamination of the conventional ways in which German liberal success and failure are understood, and a re-evaluation of what it meant to be a liberal in Germany and Europe during the first third of the twentieth century.     

Ethnic Inequalities in the Public Sector: A Comparative Analysis

This article uses empirical data to discuss the links between ethnicity, inequality and governance in a framework that divides countries according to their levels of ethnic polarization. It makes three main arguments. First, types of diversity, not the existence of diversity per se, explain potentials for conflict or cohesion in multiethnic societies. Ethnic cleavages are configured differently in different social structures and are less conflictual in some countries than in others. Second, relative balance has been achieved in the public sectors of countries that are highly fragmented or those with ethnicity‐sensitive policies, but not in those with ethnicity‐blind policies. Third, the article is critical of institutional approaches to conflict management that underplay background conditions in shaping choices. Consociational arrangements may not be relevant in unipolar ethnic settings or fragmented multiethnic societies, where governments may be ethnically inclusive under democratic conditions. They seem unavoidable in ethnic settings with two or three main groups or in settings with strong ethnic/regional clusters.     

“敬天”与“射天”:上古夏、夷族群融合之殇

上古中国西部族群多源于氐羌,其酋豪曰"大",死则火葬,灵魂"登遐"升至山上(祖山)谓之"天"。甲金文"天"字即"大"上加一横或圆圈,表示在上、上面、神灵之意,是以又有"天在山中"之说。文献如《墨子》《荀子》《吕氏春秋》等记载西方羌戎之人对于被俘本身并不特别担忧,最为担心的是死后灵魂能否"登遐"升天,即回归祖山圣地,此即西部族群的"敬天"传统。上古人认为族与族之战也是神与神之争,因此东方殷人、夷人西征夏、周要"射天"、射山、搏木偶"天神"。这个习俗远可追溯到尧时的羿"射日(天)",晚则战国宋王偃还在"射天笞地",都是对于西部族群神灵之"天"的厌胜之术,所谓"威服天下鬼神"。汉民族融合早期主要是西部诸夏族群与东部商夷族群之间交合的历史,长期交往中伴随着征战与杀伐,最后形成血的凝聚。新石器时代以来考古学文化区系的逐渐明晰,让我们进一步看清了这一点。     

Giuseppe Mazzini and the democratic logic of nationalism

ABSTRACT. This article brings the thought of Giuseppe Mazzini back into the field of nationalism studies, from which it has been largely missing for a half century. It suggests the following: that Mazzini is much more modern and secular than he is usually portrayed; and that his commitment to liberal policies while rejecting liberal principles suggests that the distinction between civic and ethnic nationalism has been misconceived. Nationalism, to Mazzini, was not an end in itself but a means to an end – government of, by and for the people. The demand for such a government was manifested in three popular demands in nineteenth‐century Europe: in the West as democracy, in the East as national sovereignty (the precondition for democracy) and in both East and West as social democracy. Thus nationalism may be instrumental rather than an end in itself, and it may be attributable not to ethnic groups' natural striving for autonomy but to the pursuit of democracy.     

Cultural legacies and electoral performance of ethnic minority parties in post‐communist Europe

Although there are numerous contributions on ethnic electoral politics, relatively little research has been devoted to explain the scope of success of ethnic minority parties. This article addresses the issue within the bounds of post‐communist Europe, paying particular attention to the effect of cultural legacies. It was confirmed, first of all, that ethnic parties are likely to emerge only if their titular minority has a number of voters larger than what is necessary to obtain parliamentary representation. Otherwise, the most successful were the ethnic parties representing the minorities characterised by legacy of regional domination, that is, those whose members had once enjoyed a dominant position as a ruling nation on a given territory (e.g. Hungarians in Slovakia). The second‐successful were the parties representing homeland minorities, that is, those which have resided on a given area for more than two centuries, but have never been members of a ruling nation. The parties representing diaspora or immigrant minorities were the least successful. Further research could assess the importance of these factors in other regions of the world.     

汉代北部边疆地区移民墓葬反映的历史问题

中国有文字记载以来发生过的人口迁移次数不胜枚举,每次移民事件的发生都对移民迁出区和迁入区产生了诸如疆域形成、民族融合、地区开发、文化传播、城市形成与发展、人口增长和