Geomagnetic daily variations in H at Alcântara and Eusébio in the Brazilian equatorial region

Daily variations in H at Alcântara (dip +3.8°) and Eusébio (dip − 6.5°), two stations in the equatorial electrojet region in Brazil, are compared. The electrojet in NE Brazil exhibits N-S asymmetry. The discrepancy between the daily variation range in H indicates the presence of complicated ionospheric currents in this region and warrants a detailed investigation.     

Variabilities in the thermospheric temperatures in the region of the crest of the equatorial ionization anomaly—a case study

Results on spectroscopic measurements of thermospheric temperatures made from a low latitude station, Abu (24.6°N, 72.7°E, geographic; 18°N dip latitude), India, situated in the crest region of the equatorial ionization anomaly (EIA), are presented. On many occasions, these measurements reveal large deviations frorn the predictions of the neutral atmospheric model, MSIS-86, bringing out its limitations as applied to the equatorial and low latitude thermosphere. The role played by large-scale geophysical processes like the EIA, equatorial spread F (ESF) and the midnight temperature maximum (MTM), all of which influence the thermal structure of the upper atmosphere, is examined in the context of explaining the differences between the measured temperatures and model predictions. It has been conclusively shown that Joule heating associated with ESF irregular electric fields is not solely responsible for the observed deviations, and the possibility of a significant role by the EIA related processes is indicated.     

Electric fields and currents in the equatorial electrojet deduced from VHF radar observations—I. A method of estimating electric fields

Using the measured Doppler spectra of the VHF backscatter radar signals from type II ionization irregularities in the equatorial electrojet (EEJ) at Thumba (dip. 56′S), the height profiles of the phase velocity V_p of the plasma waves in the EEJ are determined. It is shown that the east-west electrostatic field E_y in the EEJ can be deduced from the experimental height profiles of V_p using an appropriate model of ion and electron collision frequencies. The theoretical basis and the practical application of the method for deducing E_y are described. The usefulness of the method even when type I irregularities are present at the higher altitudes of the EEJ is demonstrated.It is shown that the collision frequencies of ions and electrons are likely to have a significant diurnal variation, which may be caused by diurnal variations of the neutral densities and temperatures in the E-region.     

Electric fields and currents in the equatorial electrojet deduced from VHF radar observations—III. Comparison of observed ΔH values with those estimated from measured electric fields

From VHF backscatter radar measurements at Thumba (dip: 56′S) of the phase velocities of type II irregularities in the equatorial electrojet (EEJ), electric field (E_y) values are estimated for different times of the day. Using the electric field values thus deduced and the Pedersen and Hall conductivities calculated using model values of electron densities and the collision frequencies of ions and electrons, the height integrated current intensity in the EEJ is estimated. The surface level geomagnetic field perturbation ΔH produced by this ionospheric current is then calculated. The calculated values of ΔH are compared with observed values of ΔH (after subtracting the magnetospheric contribution of D_st) for a number of days. The comparisons show good agreement between observed ΔH values and those calculated from measured electric fields. The agreement is found to be good even when type I irregularities are present at higher altitudes in the EEJ. This comparative study demonstrates the validity of estimating electric field values from VHF radar measurements and it indicates the possibility of deducing electric field values from ground level ΔH values, at least for statistical studies.     

Electric fields and currents in the equatorial electrojet deduced from VHF radar observations—II. Characteristics of electric fields on quiet and disturbed days

Using the Doppler spectra of VHF radar signals, the height profiles of the phase velocity (V_p) of 2.7 m irregularities in the equatorial electrojet (EEJ) over Thumba (dip: 56′S) are obtained. The day-time east-west electric fields (E_y) are deduced by matching experimentally observed V_p profiles with theoretically deduced ones for a number of quiet and disturbed days. The experimental E_y values show: (i) a large day-to-day variability; (ii) a large decrease in the afternoon hours on some days (quiet and disturbed); (iii) the frequent presence of short period fluctuations with amplitudes of 30–50% of the background value and with typical time scales of 30–60 min, on moderately disturbed days (9 ⩽ A_p ⩽ 30); (iv) a significant decrease of the average E_y on disturbed days compared to that on quiet days during 0900–1200 h L.T.     

Comecon and the South in the years of détente: a study on East–South economic relations

The article deals with the economic relations of the socialist bloc with less-developed countries in the 1960s and 1970s. It focuses on the economic policies envisaged by technocrats and policy-makers in the Comecon's Commission for technical assistance. It argues that the original formula based on autarky, whereby socialist aid aimed at building a clear alternative to the West and less-developed countries were advised to introduce Soviet-style planning, nationalisation and industrialisation, was progressively abandoned during détente. Doubts on the appropriateness of the Soviet model emerged, especially in Eastern European governments. Trade became increasingly crucial and the strategy of promoting an international division of labour based on mutual advantage turned into an obsession with importing strategic raw materials. In the mid-1970s, despite the official socialist view, the East pursued ‘realist’ policies that made sense in terms of economics rather than ideology. The myth of socialist modernity as a variant of industrial modernity had definitely collapsed, and socialist countries' participation in the Western-dominated world economy became a necessity. Eventually, the developing world became the place where a joint East–West co-operation could take place, often in the framework of the so-called trilateral co-operation, where Western Europe had a special role.     

The first European representative of the South American family Xenopteraidae (Insecta: Megasecoptera) discovered in the Guadalupian of Lodève (France)

NEL, A., LAPEYRIE, J. & GARROUSTE, R. May 6 2019. The first European representative of the South American family Xenopteraidae (Insecta: Megasecoptera) discovered in the Guadalupian of Lodève (France). Alcheringa 43, 436–440. ISSN 0311-5518.

A new genus, Sinitshenkovae gen. nov., is described, comprising the Carboniferous species Sinitshenkovae hueneckeni (Pinto & Pinto de Ornellas, 1978 Pinto, I.D. & Pinto de Ornellas, L., 1978. Upper Carboniferous insects from Argentina. 1. Familia Diaphanopteridae (Megasecopteroidea). Pesquisas (Zoologiat) 10, 87–95. [Google Scholar]) comb. nov. from South America and new Guadalupian species S. gallica sp. nov. from France. These two species are attributed to the Paleozoic South American family Xenopteraidae, a previously monospecific family only containing Xenoptera riojaensis Pinto, 1986 Pinto, I.D., 1986. Carboniferous insects from Argentina. 3. Family Xenopteridae Pinto nov. fam. (Megasecoptera). Pesquisas (Zoologia) 18, 23–29. [Google Scholar]. Sinitshenkovae gallica sp. nov. is therefore the youngest representative of this family and the only record outside South America, which suggests that our current knowledge of the palaeobiogeography of Permian and Carboniferous insects remains incomplete.

André Nel [anel@mnhn.fr] and Romain Garrouste [garroust@mnhn.fr], Institut Systématique Evolution Biodiversité (ISYEB), Muséum national d’Histoire naturelle, CNRS, Sorbonne Université, EPHE, 57 rue Cuvier, CP 50, 75005 Paris, France; Jean Lapeyrie [jean.lapeyrie@orange.fr], Corniche de Fontbonne, F-34700 Lodève, France.     

Water and power in South Arabia: the excavation of “Monumental Building 1” (MB1) at Sumhuram (Sultanate of Oman)

The ancient port city of Sumhuram (Dhofar Governorate, Sultanate of Oman) has been the focus of over 20 years of research by the Italian Mission to Oman (IMTO), University of Pisa, in collaboration with the Office of the Adviser to His Majesty the Sultan for Cultural Affairs (Muscat-Salalah, Sultanate of Oman). Excavation has revealed most of the town layout, leading to the identification of several buildings, alleyways, squares and workshops, among which two massive buildings stand out, significantly named by the excavators as “Monumental Building” 1 and 2 (MB1 and MB2). This paper presents the results of the excavation inside MB1, characterised by the presence of the only well discovered within the city walls, which was previously interpreted alternatively as a palace or as a temple. The architectural development of the building, its distinctive features, the archaeological material discovered inside it, and its chronology will be discussed. These results highlight the absence of fitting parallels from other ancient South Arabian towns. Overall, it is clear that access to, management of, and control over the water supply of the town represented a key asset which justified the huge investment in workforce and building materials that is reflected in the monumental architecture of this edifice.     

Laboratories of (In)equality? Redistributive Policy and Income Inequality in the American States

Prior literature has emphasized demographic, economic, and political explanations for increasing income inequality in the United States, with little attention paid to the role of state‐level policy. This is despite great variation across states in both the level of inequality and the rate at which it is rising. This paper asks whether differences in state policy choices can help explain this variation; specifically, we examined a range of state redistributive policies enacted between 1980 and 2005 and identified four common approaches likely to impact inequality: taxes on the wealthy, taxes on the poor, spending on the poor, and labor market policies. We used pooled cross‐sectional time‐series data and a fixed‐effects model to assess the relationship between states’ use of each policy approach and two measures of market income inequality: the Gini coefficient and the income share of the top 1 percent. We find policies played a significant role in shaping income inequality in the states. For three of these four policy approaches, we found less inequality following expansions of state redistributive policy. Yet, for another, we identified the opposite pattern. These findings highlight the importance of state policy choices in shaping market inequality, and have implications for designing state policies to reduce income inequality since the success of these efforts depends on the policy approach used to redistribute income and wealth.     

Revised conodont and fusuline biostratigraphy of the Bamchi Formation (Pyongan Supergroup) at the Bamchi section,Yeongwol and the Carboniferous–Permian boundary in South Korea

Wang, Q., Wang, Y., Qi, Y., Wang, X., Choh, S.J., Lee, D.C. & Lee, D.J., November 2017. Yeongwol and the Carboniferous–Permian boundary in South Korea. Alcheringa 42, 245–258. ISSN 0311-5518

Six conodont and one fusuline zones are recognized on basis of a total of 25 conodont and 13 fusuline species (including seven unidentified species or species given with cf. or aff. in total) from the Bamchi Formation, Yeongwol, Korea. The conodont zones include the Streptognathodus bellus, S. isolatus, S. cristellaris, S. sigmoidalis, S. fusus and S. barskovi zones in ascending order, which can be correlated with the conodont zones spanning the uppermost Gzhelian to Asselian Age of the Permian globally. The fusuline zone is named the Rugosofusulina complicata–Pseudoschwagerina paraborealis zone. The co-occurrence of the conodont Streptognathodus isolatus (the Global Boundary Stratotype Section and Point index for the base of Permian) and Pseudoschwagerina (a Permian inflated fusuline) indicates that the Carboniferous–Permian boundary can be placed in the lower part of the Bamchi Formation in South Korea.

Qiulai Wang* [qlwang@nigpas.ac.cn] CAS Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, East Beijing Road 39, Nanjing 210008, PR China; Yue Wang* [yuewang@nigpas.ac.cn] LPS, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, East Beijing Road 39, Nanjing 210008, PR China; Yuping Qi* [ypqi@nigpas.ac.cn] Xiangdong Wang* [xdwang@nigpas.ac.cn] CAS Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, East Beijing Road 39, Nanjing 210008, PR China; Suk-Joo Choh [sjchoh@korea.ac.kr] Department of Earth and Environmental Sciences, Korea University, Seoul 02841, Republic of Korea; Dong-Chan Lee [dclee@chungbuk.ac.kr] Department of Earth Sciences Education, Chungbuk National University, Cheongju 28644, Republic of Korea; Dong-Jin Lee [djlee@andong.ac.kr] Department of Earth and Environmental Sciences, Andong National University, Andong 36729, Republic of Korea. *Also affiliated with: University of Chinese Academy of Sciences, 19A Yuquan Road, Shijingshan District, Beijing 100049, PR China.     

A Patina of Age: Elizabeth Macquarie (née) Campbell and the Influence of the Buildings and Landscape of Argyll,Scotland, in Colonial New South Wales

Elizabeth Macquarie, a daughter of Campbell of Airds, was the wife of Lachlan Macquarie, the fifth governor of New South Wales (1810–21). The buildings of Argyll, Scotland, strongly influenced choices made by Elizabeth in the buildings erected during her husband’s 12-year administration of the colony. By examining these Scottish influences, through theories of landscape and the transfer of traditional, even “old-fashioned,” architectural styles to this far-flung colony, new layers of meaning embedded within the landscape of Sydney Cove are disentangled to reveal a deeper understanding of how British cultural identity was recreated on the far side of the world.     

Canadian and American Treatment of the Nikkei, 1890–1949: A Comparison

For many Japanese people, the 49th parallel was only a line on a map, yet there were differences for the Japanese residents in the United States and Canada. The two nations had different concepts of citizenship and constitutions but, in what has been called “hemispheric orientalism,” prejudice knew no border. Both countries severely restricted immigration from Japan. In the United States, immigrants, the Issei, were aliens ineligible for citizenship. Thus, states could deny their access to commercial fishing and the right to own or lease land. Because the American constitution bestows full citizenship on the native-born, their American-born children, the Nisei, could vote and acquire land, but experienced discrimination especially in employment. On paper, the Canadian Issei had more civil rights since they could become naturalized but this provided few advantages apart from the rights to own land and to fish commercially. The Canadian Nisei had no more rights than their parents. In British Columbia, where 95 percent of the Japanese lived, they could not vote and provincial laws and customs denied their access to many occupations. During the Second World War, both nations required all the Nikkei to leave the Pacific Coast, incarcerated some, severely restricted the mobility of others, and proposed to “repatriate” many of them to Japan. Drawing mainly on the previous scholarship which has examined specific themes, time periods, or comparisons, this article offers an overview of how between the 1890s and the 1940s the effects of prejudice varied more in detail and timing than in principle even though formal consultation between the two nations was sporadic.     

Assessing the Diversity of Mission Populations through the Comparison of Native American Residences at Mission Santa Clara de Asís

Mission establishments in Alta California and elsewhere were home to complex, pluralistic communities in which native peoples actively but differentially negotiated aspects of colonialism through daily practice and the reinterpretation of identity. To explore these issues, we compare the archaeological evidence from two different indigenous dwellings at California’s Mission Santa Clara de Asís: an adobe barracks and a native-style thatched house. In particular, we consider possible differences between the dwellings’ inhabitants in terms of relative status, ethnolinguistic affiliation, and re-articulation of indigenous traditions.     

A numerical model of the ionospheric dynamo—III electric current at equatorial and low latitudes

Using the general dynamo model and its special cases derived in a previous paper, the distributions of three dimensional electric current density in a magnetic meridional plane in the equatorial and low latitude ionosphere are computed. The winds generating the ionospheric dynamo are tide-like and locally periodic, similar to those in an internal gravity wave. Very large (several μA m⁻²) field-aligned current density is obtained in the equatorial region at places of sharp vertical gradients of the wind velocity. The currents generated by locally periodic winds of latitudinal wavelength less than several hundred kilometers do not significantly affect the normal equatorial electrojet.     

The dynamics of ion layer generation in the 80–150 km altitude region at low and mid-latitudes

The association of sporadic ion and sporadic sodium layers in the low-latitude, 90–100 km altitude region suggests that we must look beyond the windshear theory for details of the formation mechanism of sporadic layers in the 80–150 km altitude region. We present evidence, including specific 85–105 km results from the AIDA-89 and the ALOHA-90 campaigns, that 80–150 km altitude sporadic layers—including sporadic sodium layers—are generated in a complex interplay of tidal and acoustic-gravity wave (AGW) dynamics with temperature-dependent chemistry where wave-produced temperature variations are both adiabatic and dissipative or turbulent (non-reversible) in origin. We suggest that layering processes are best studied with an instrument cluster that includes sodium and iron lidars, MST radar (turbulence), incoherent scatter radar (electron concentration and winds), meteor radar techniques (winds), passive optical/IR imaging techniques, and appropriate rocket payloads to study a significant volume of the 80–150 km altitude region. We introduce the concept of volumtric radar and lidar techniques.     

Jean Améry's Concept of Resentment at the Crossroads of Ethics and Politics

The questions of forgiveness and political justice have recently become intertwined with the “transitional justice” project, the aim of which is the coming to terms with past human rights violations. This article demonstrates that “transitional justice” is less concerned with providing justice than with achieving historical closure, moral redemption, and a “new beginning.” It proposes that justice requires a profound reflection of a political nature by introducing and discussing Jean Améry's concept of resentment. Central to Améry's view of resentment is the restoration of the victim's social status and dignity, the validation of the experience of victimhood; his view therefore contrasts with the Nietzschean derogative view of ressentiment. On the basis of Améry's conceptualizations and with reference to Derrida's notions of “hiatus” and “forgiveness as impossibility,” the article problematizes the relation of ethics and politics—which the “transitional justice” project takes as given. It suggests that to theorize on justice, one needs to parenthesize the moral imagery of forgiveness and bring thirdness (or plurality) to the fore as the space where the identities of “victims” and “perpetrators” are established and played out.     

Plant remains from Roman period town of Obulco (today Porcuna) in Andalusia (Spain)—distribution and domestication of olive in the west Mediterranean region

The aim of this work is (1) to identify the key characteristics of agriculture and the role of olive in Porcuna (Andalusia) of Roman period and (2) to derive a conclusion about the origin of cultivated olive. The study of the literature showed that the olive is one of the most esteemed fruit species in the Classical Mediterranean world and is considered to have been domesticated first in Levant region. The signs of cultivation appear since the Neolithic. The authors analysed 18 samples from archaeological sites. Sorting and identification were carried out using a binocular microscope with the help of comparative collection of seeds/fruits and identification atlases (Digital Seed Atlas of the Netherlands: Cappers et al. 2006). A total number of 19,616 remains was studied. The remains belong to groups of fruit trees, cereals, pulses and synanthropic plants. The cultivated species were used for domestic purposes. The cereals, pulses and mesocarps of the fruits served as food. Important characteristic trait was the overrepresentation of olives. The authors give a summary of the development that led to the cultivation and domestication of the olive tree and to reconstruct its early diffusion using different sources of information, such as archaeobotanical analysis, archaeological data and genetical studies. As a result, a better understanding of the domestication and use of olive on a Mediterranean scale is given. This study also discusses cultivated and synanthropic species in Roman settlements on the Iberian Peninsula.     

Sharks in the lagoon? Fishing exploitation at the Neolithic site of Suwayh 1 (Ash Sharqiyah region,Arabian Sea,Sultanate of Oman)

The study of the fish bones from the Neolithic shell midden of Suwayh 1, excavated in the 2000s, identified a total of 1060 identifiable fish bones, from 23 families, 33 genera and 28 different species. Radiocarbon dating demonstrates that the sites date to the early 6th to mid 5th millennium BC. The results follow an eight-phase chronology highlighted by an earlier malacological study. The most important taxa were the Carcharhinidae (requiem shark), Rhinopteridae (cownose rays), Sparoidea (Sparidae and Lethrinidae: sea breams and emperors) and Ariidae (sea catfishes). The results of the fish study show that the Suwayh lagoon must have gradually opened up to the sea and been populated with mangroves. The unique presence of so many sharks at this site seems to indicate that the inhabitants had a special interest in shark fishing and that their location was ideal for this specialised activity. Two types of fishing nets and hooks have been discovered, which require the use of different fishing techniques.