The Ceramic Sequence at Nakbe, Guatemala

1993 ◽  
Vol 4 (1) ◽  
pp. 31-53 ◽  
Author(s):  
Donald W. Forsyth

AbstractThe site of Nakbe, located approximately 13 km southeast of El Mirador in the far northern part of the Peten, has been investigated by the RAINPEG Project, directed by Richard Hansen, for the last four field seasons. The ceramic sequence from Nakbe has provided us with a much broader view of cultural development in the north-central Peten. We have defined a series of preliminary ceramic complexes that span Middle Preclassic through Late Classic times.The earliest complex at Nakbe, called Ox, which belongs to the Mamom horizon, is one of the two best represented at the site, and definitely associated, late in the period, with large-scale architecture. The principal ceramic groups are the Juventud, Chunhinta, and Pital. The main forms are bowls or basins with flaring walls and direct or everted rims, short-necked jars, cuspidors or semicuspidors, and composite-silhouette bowls. Particularly notable, although rare, are the types Muxanal Red-on-Cream and Tierra Mojada Resist. The Ox Complex is characterized by a high frequency of decoration executed by penetration methods, especially incision and chamfering.The unslipped pottery pertains to the types Achiotes Unslipped and Palma Daub. The latter is marked by a red wash applied to the exterior neck of the jar, the major form in these types. Daub is a form of decoration limited to the Middle Preclassic in this area, as is the chamfering technique on the slipped pottery.The ceramic complexes most similar to Ox are located to the south of Nakbe at Uaxactun and Tikal. The high frequency of chamfering, daub, and other traits strongly link Nakbe to these southern sites during the Middle Preclassic, while sites to the north and southwest, such as Seibal, Altar de Sacrificios, and Becan exhibit more tenuous connections.The Kan Complex belongs to the Late Preclassic period, and is characterized by the Sierra, Polvero, Flor, and Sapote Ceramic Groups. Although associated with the large structures in the site center, Kan ceramics are less abundant than Ox ceramics in our samples. Kan pottery corresponds closely to that of El Mirador and is similar to other complexes of the Chicanel horizon. Particularly noteworthy are everted rims with circumferential grooves and lateral, labial, and medial flanges and ridges. The unslipped pottery of the Kan Complex consists almost exclusively of jars bearing exterior striation from the shoulder to the base.The closest ceramic ties to Kan pottery continues to be with the southern complexes, especially Uaxactun and Tikal. Moreover, the similarity to Seibal is greater during Chicanel times, while Belize appears to differentiate itself ceramically from the Peten during this time. Nevertheless, the Chicanel horizon is the period in which the maximum geographical extent of a ceramic sphere is reached.“Protoclassic” ceramics are rare, but the small amounts recovered at Nakbe are similar to those from El Mirador. The major type is Iberia Orange, found in small quantities in surface contexts. Characterized by hollow, mammiform supports, hooked rims, and orange slip, this Nakbe pottery seems to be more similar to pottery at Seibal than to other complexes with Protoclassic pottery.Early Classic pottery is virtually nonexistent in our excavations, suggesting an insignificant occupation during this period.Late Classic pottery (Uuc Complex) appears in significant quantities at Nakbe, mainly in the outskirts of the site. All of the types and modes defined at El Mirador are found at Nakbe, principally Tinaja Red, Chinja Impressed, Infierno Black, and Carmelita Incised, as well as the polychrome types. Moreover, Codex-style polychrome was also found at the site. As at El Mirador, the Uuc ceramics are not found in association with large-scale architecture, and it appears that Nakbe was not a major center at this time.The major occupations at Nakbe pertain to the Middle and Late Preclassic periods. The abundance of architecture, ceramics, and other classes of artifacts from the Ox Complex provides us with an opportunity to investigate a Middle Preclassic occupation in which there was a much more complex social organization, at least at Nakbe, than had previously been suspected.

1983 ◽  
Vol 48 (3) ◽  
pp. 519-543 ◽  
Author(s):  
Harry J. Shafer ◽  
Thomas R. Hester

Recent archaeological work at Colha and at other localities in the geographically restricted chert-bearing zone of northern Belize has revealed large-scale exploitation of chert for stone tool production. Workshops dated during the Late Preclassic period signal the beginning of craft specialization in chert working that continued in the Late Classic and into the Early Postclassic periods. Secular items such as large oval bifaces, tranchet bit tools and prismatic blades, as well as nonsecular eccentrics and stemmed macroblade artifacts are distinctive of the Late Preclassic and Late Classic workshops. The distribution sphere of Preclassic and Classic period chert tools has been traced to several contemporaneous sites that lie beyond the chert-bearing zone to the north. Colha has been identified as the primary production and distribution center during the Late Preclassic period; although it remained a production center in the Late Classic period, the main center for distribution may have shifted to Altun Ha.


Author(s):  
Bobbi Hohmann ◽  
Terry G. Powis ◽  
Paul F. Healy

Extensive archaeological investigations at the site of Pacbitun, a medium-sized Maya center located in west-central Belize, have revealed the large-scale production of marine shell ornaments during Middle Preclassic period (900-300 B.C.). Non-local marine shell and the restricted nature of its distribution indicate that some degree of control may have been exerted over the production and/or distribution of marine shell or the finished shell products. The sheer quantities of shell working debris in the site core of Pacbitun suggest that these ornaments were intended for intra- or extra-community exchange. Two different scenarios are presented to account for the quantity and spatial distribution of Middle Preclassic shell and shell working materials at Pacbitun and in the Belize River valley.


2016 ◽  
Vol 46 (4) ◽  
pp. 1067-1079 ◽  
Author(s):  
L. Clément ◽  
E. Frajka-Williams ◽  
K. L. Sheen ◽  
J. A. Brearley ◽  
A. C. Naveira Garabato

AbstractDespite the major role played by mesoscale eddies in redistributing the energy of the large-scale circulation, our understanding of their dissipation is still incomplete. This study investigates the generation of internal waves by decaying eddies in the North Atlantic western boundary. The eddy presence and decay are measured from the altimetric surface relative vorticity associated with an array of full-depth current meters extending ~100 km offshore at 26.5°N. In addition, internal waves are analyzed over a topographic rise from 2-yr high-frequency measurements of an acoustic Doppler current profiler (ADCP), which is located 13 km offshore in 600-m deep water. Despite an apparent polarity independence of the eddy decay observed from altimetric data, the flow in the deepest 100 m is enhanced for anticyclones (25.2 cm s−1) compared with cyclones (−4.7 cm s−1). Accordingly, the internal wave field is sensitive to this polarity-dependent deep velocity. This is apparent from the eddy-modulated enhanced dissipation rate, which is obtained from a finescale parameterization and exceeds 10−9 W kg−1 for near-bottom flows greater than 8 cm s−1. The present study underlines the importance of oceanic western boundaries for removing the energy of low-mode westward-propagating eddies to higher-mode internal waves.


2012 ◽  
Vol 12 (7) ◽  
pp. 16851-16884
Author(s):  
C. Yver ◽  
H. Graven ◽  
D. D. Lucas ◽  
P. Cameron-Smith ◽  
R. Keeling ◽  
...  

Abstract. This paper presents a step in the development of a top-down method to complement the bottom-up inventories of halocarbon emissions in California using high frequency observations, forward simulations and inverse methods. The Scripps Institution of Oceanography high-frequency atmospheric halocarbon measurement sites are located along the California coast and therefore the evaluation of transport in the chosen Weather Research Forecast (WRF) model at these sites is crucial for inverse modeling. The performance of the transport model has been investigated by comparing the wind direction and speed at four locations along the coast using aircraft weather reports. Different planetary boundary layer (PBL) schemes, nesting options and two meteorological datasets have been tested. Finally, simulated concentration of an inert tracer has been briefly investigated. All the PBL schemes present similar results that generally agree with observations, except in summer when the model sea breeze is too strong. At the coarse 12 km resolution, using ERA-interim (ECMWF Re-Analysis) as initial and boundary conditions leads to improvements compared to using the North American Model (NAM) dataset. Adding higher resolution nests also improves the match with the observations. However, no further improvement is observed from increasing the nest resolution from 4 km to 0.8 km. Once optimized, the model is able to reproduce tracer measurements during typical winter California large-scale events (Santa Ana). Furthermore, with the WRF/CHEM chemistry module and the European Database for Global Atmospheric Research (EDGAR) version 4.1 emissions for HFC-134a, we find that using a simple emission scaling factor is not sufficient to infer emissions, which highlights the need for more complex inversions.


2006 ◽  
Vol 17 (2) ◽  
pp. 177-201 ◽  
Author(s):  
Kevin J. Johnston

Maya elites and commoners intensively occupied the Itzan escarpment, located in the lower Río de la Pasión drainage system of Petén, Guatemala, during the Preclassic and Protoclassic periods. Itzan was colonized during the Xe phase of the Middle Preclassic period, and its occupation intensified during the late Middle and Late Preclassic periods, when elite residential and ceremonial facilities were erected. During the Late Preclassic and Protoclassic periods, the escarpment was dominated by Chaak Ak'al, a large site distinguished by massive pyramids and lengthy wall-like constructions, which undoubtedly served as a polity capital. Subsequent to the Protoclassic period, the locus of activity atop the escarpment shifted back to Itzan, which served as a polity capital through the Late Classic period. From data collected at Itzan, Chaak Ak'al, and other sites of the lower Río de la Pasión drainage system, a picture of regional Preclassic Maya political geography is emerging.


Author(s):  
Halid Can Yildirim ◽  
Gary B. Marquis ◽  
Per J. Haagensen

Design recommendations for high frequency mechanical impact (HFMI)-treated welds have been proposed based on available experimental fatigue data of axially-loaded high strength steel specimens which include longitudinal, cruciform and butt welds. Test specimens were of a size appropriate for laboratory study. However, in reality, structures in civil, offshore and ship industries generally include large-scale and more complicated components, such as bridges, cranes, platforms, excavators etc. This paper presents a further validation of the design proposals by considering fatigue data sets which are obtained from large-scale components. The extracted fatigue data from the available literature includes bridge, crane and beam like components. In total, 65 published test results of weld details with various yield strengths (250 ≤ fy ≤ 725 MPa) and stress ratios (−1 ≤ R ≤ 0.56) are presented. All the data are found to be in good agreement with the previously-shown design curves.


2013 ◽  
Vol 13 (4) ◽  
pp. 1837-1852 ◽  
Author(s):  
C. E. Yver ◽  
H. D. Graven ◽  
D. D. Lucas ◽  
P. J. Cameron-Smith ◽  
R. F. Keeling ◽  
...  

Abstract. This paper presents a step in the development of a top-down method to complement the bottom-up inventories of halocarbon emissions in California using high frequency observations, forward simulations and inverse methods. The Scripps Institution of Oceanography high-frequency atmospheric halocarbons measurement sites are located along the California coast and therefore the evaluation of transport in the chosen Weather Research Forecast (WRF) model at these sites is crucial for inverse modeling. The performance of the transport model has been investigated by comparing the wind direction and speed and temperature at four locations using aircraft weather reports as well at all METAR weather stations in our domain for hourly variations. Different planetary boundary layer (PBL) schemes, horizontal resolutions (achieved through nesting) and two meteorological datasets have been tested. Finally, simulated concentration of an inert tracer has been briefly investigated. All the PBL schemes present similar results that generally agree with observations, except in summer when the model sea breeze is too strong. At the coarse 12 km resolution, using ERA-interim (ECMWF Re-Analysis) as initial and boundary conditions leads to improvements compared to using the North American Model (NAM) dataset. Adding higher resolution nests also improves the match with the observations. However, no further improvement is observed from increasing the nest resolution from 4 km to 0.8 km. Once optimized, the model is able to reproduce tracer measurements during typical winter California large-scale events (Santa Ana). Furthermore, with the WRF/CHEM chemistry module and the European Database for Global Atmospheric Research (EDGAR) version 4.1 emissions for HFC-134a, we find that using a simple emission scaling factor is not sufficient to infer emissions, which highlights the need for more complex inversions.


2018 ◽  
pp. 1-34
Author(s):  
Andrew Jackson

One scenario put forward by researchers, political commentators and journalists for the collapse of North Korea has been a People’s Power (or popular) rebellion. This paper analyses why no popular rebellion has occurred in the DPRK under Kim Jong Un. It challenges the assumption that popular rebellion would happen because of widespread anger caused by a greater awareness of superior economic conditions outside the DPRK. Using Jack Goldstone’s theoretical expla-nations for the outbreak of popular rebellion, and comparisons with the 1989 Romanian and 2010–11 Tunisian transitions, this paper argues that marketi-zation has led to a loosening of state ideological control and to an influx of infor-mation about conditions in the outside world. However, unlike the Tunisian transitions—in which a new information context shaped by social media, the Al-Jazeera network and an experience of protest helped create a sense of pan-Arab solidarity amongst Tunisians resisting their government—there has been no similar ideology unifying North Koreans against their regime. There is evidence of discontent in market unrest in the DPRK, although protests between 2011 and the present have mostly been in defense of the right of people to support themselves through private trade. North Koreans believe this right has been guaranteed, or at least tacitly condoned, by the Kim Jong Un government. There has not been any large-scale explosion of popular anger because the state has not attempted to crush market activities outright under Kim Jong Un. There are other reasons why no popular rebellion has occurred in the North. Unlike Tunisia, the DPRK lacks a dissident political elite capable of leading an opposition movement, and unlike Romania, the DPRK authorities have shown some flexibility in their anti-dissent strategies, taking a more tolerant approach to protests against economic issues. Reduced levels of violence during periods of unrest and an effective system of information control may have helped restrict the expansion of unrest beyond rural areas.


The key aspects of the process of designing and developing an information and cartographic control tool with business analytics functions for the municipal level of urban management are considered. The review of functionality of the developed tool is given. Examples of its use for the analysis and monitoring of implementation of the program of complex development of territories are given. The importance of application of information support of management and coordination at all levels of management as an integral part of the basic model of management and coordination system of large-scale urban projects of dispersed construction is proved. Information and map-made tool with business intelligence functions was used and was highly appreciated in the preparation of information-analytical and presentation materials of the North-Eastern Administrative District of Moscow. Its use made it possible to significantly optimize the list of activities of the program of integrated development of territories, their priority and timing.


2020 ◽  
Vol 4 (8(77)) ◽  
pp. 4-7
Author(s):  
Sardaana Anatolievna Alekseeva

When getting acquainted with the ethnic traditions of the peoples of Yakutia, special attention should be paid to the national culture of the evens as a small indigenous people of the North. Cultural and ethnographic features of Yakutia are one of the most important resources for the development of tourism. The main purpose of the work is to consider the potential of ethnic tourism on the example of the village of Sebyan-Kuel in the Кobyai district of Yakutia. The following specific ethnographic methods are used: the method of included observation and indepth interview. The result was that in this remote mountains of the Verkhoyansk ridge preserved the original culture of the local group Lamynkhinsky Evens, which is a unique, non-commodity, and, consequently, an inexhaustible resource for the economy, social and cultural development of the nasleg. In our opinion, the area of Lamynkhinsky nasleg can become one of the most popular tourist destinations due to its uniqueness in ethnic and extreme, ecological, hunting and fishing types of tourism.


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