Seasonality

We use an agent-based approach to model trading behaviour in high-frequency markets. This study focuses on the Foreign Exchange (FX) market. The initial part of this study is to observe the micro-behaviour of traders to define the stylized facts of their trading activities. This is performed using a high- frequency dataset of anonymised individual traders' historical transactions on an account

"This dissertation presents results from four recently discovered archeological sites in southcentral Alaska. The sites range from the Younger Dryas to middle Holocene in age and provide valuable contextual information for the human process of colonizing a region that was heavily glaciated during the LGM. The deglaciation and human colonization of southcentral Alaska is one of the most significant aspects of the settling phase in eastern Beringia not only for its potential to inform about the human response to post-glacial landscapes but also for what we can learn about subsequent migrations to the southern coast of Alaska.

Understanding how early foraging societies spread throughout eastern Beringia, after its initial colonization, requires new models for and approaches to the interpretation of technological variability, especially the enigmatic microblade industries that represent an essential subset of nearly all of the northern prehistoric toolkits. This work presents an ecological approach to the interpretation of assemblage variability in central and southcentral Alaska. Climate and seasonal changes had significant impacts on small-scale foraging societies and undoubtedly played a decisive role in the successes and failures of the earliest Alaskans. This was certainly the case during the transition from the Pleistocene to Holocene as major climatic oscillations were underway and foothold communities north of the Alaska Range began dispersing south into the recently deglaciated territories of southcentral Alaska."

Agnébi is the most important river of littoral of Côte d'Ivoire. The first study of benthic macroinvertebrates of this river was studied in the middle stream (Pont Autoroute). This station was visited monthly during 10 months covering the 4 local rainy seasons. Ten (10) samples of the Ekman grab (an area of 0.225 m2) have been analyzed. Benthic macro fauna inventory showed for the whole river, 50 taxa distributed or divided: Oligochetes (2 taxa), Molluscs (14 taxa) and Insects (34 taxa). Five taxa are abundant (superior or equal of 5 % of total number) at Pont Autoroute: Potadoma liberiensis (37,3 %), Gabbiella africana (8,4 %), Cleopatra bulimoïdes (7,7 %), Mutela dubia (5,9 %) Chironomus spp (5,3 %). Specimen such as Ephemeroptera and Diptera Chironomidae are influenced by temperature and dissolved oxygen. High positive correlation has been established between snails and nitrate.

In summer 1993 we measured the transfer of (239/240)Pu to milk from herbage from a pasture located 5 km from the Chernobyl nuclear power plant. In one treatment cows were allowed to graze freely on the pasture. In a second treatment, cows were fed herbage collected from the pasture in stalls. The milk transfer coefficient; F(m) did not vary significantly between treatments and the mean value of 7.5x10(-6)d l(-1) was higher than previously reported values. Despite many values of F(m) for Pu in the literature we identified few relevant original data sets. Transfer coefficient values for Pu are only appropriate when used in conjunction with a specified time period or an appropriate model which allows for the biological half-life. We recommend for screening purposes an F(m) value of 1x10(-5)d l(-1) for Pu, with an order of magnitude lower value being appropriate for cows which are only exposed for one grazing season.

ACKNOWLEDGEMENT We gratefully acknowledge the technical and field assistance of George Arguello, Eutimio Garcia, Martin Mead and Leslie Robbins; secretarial assistance of Doris Hight and Patricia Cooksey; and the folks with the NMSU Library Document Delivery Service. ABSTRACT

The paper explores time measurements and perception of time by the ancient Slavs in the Pre-Migration Period and Slavic settlement of Central and Southern Europe.  It attempts to reconstruct a year, seasonal, month-like division and naming, as well as lunar and solar time measurement.  Moreover, it explores and attempts to reconstruct what were the common Slavic month names that, is before 5th-7th centuries.  It also, discusses the issue of adoption of Julian calendar across the Slavdom in the period between the 9th-11th centuries.  The research is based on scarce limited written historical records as it explores the times before writing came to the Slavs.  Hence to a large degree it relies on abundant ethnographic sources, as well as on linguistics.  Therefore, in principle it employs a comparative methodology and often draws from Indo-European examples.

Pollen immigration can offset the effects of genetic drift and inbreeding in small populations. To understand the genetic consequences of forest fragmentation, estimates of pollen flow into remnant fragments are essential. Such estimates are straightforward for plants with singly sired, multiseeded fruits, since the pollen donor genotype for each fruit can be unambiguously reconstructed through full-sib genealogical analyses. Allozyme analyses were used to estimate pollen donor numbers from the progeny of fruits of the tropical dry forest tree Enterolobium cyclocarpum in a small (9.8 ha) fragmented population (N = 11) over three reproductive seasons (1994, 1995, and 1996). These analyses indicate that each tree receives pollen from many pollen donors. When data are pooled for the site, estimated maximum pollen donor pool sizes in all years exceed the number of individuals (56) in the 227 ha study area. Although unidentified pollen donors may be located as close as 250 m to the study...

SUMMARY: Chapter 7, in Renfrew & Bahn's textbook (Archaeology: Theories, Methods, and Practice), covers how to assess past subsistence and diet, including plant food (e.g., macro- and microbotanical remains; plant residues; seasonality; domestication), animal resources (e.g., macro-faunal remains; age, sex, and seasonality; domestication; small fauna; types of exploitation), and assessing diet from human remains (e.g., stomach contents; feces; teeth; isotopic methods; bone collagen).  A small case study is placed at the end of this ppt. lecture, emphasizing some aspects of subsistence.  In my view, this is one of the best college textbooks available, and is invaluable for students, archaeologists, and the public in general, to obtain a top notch overview of approaching and interpreting the archaeological record. UPDATED March 2021, minimal new material.

Stream classification methods classify a continuous stream of data as new labelled samples arrive. They often also have to deal with concept drift. This paper focuses on seasonal drift in stream classification, which can be found in many real-world application data sources. Traditional approaches of stream classification consider seasonal drift by including seasonal dummy/indicator variables or building separate models for each season. But these approaches have strong limitations in high-dimensional classification problems, or with complex seasonal patterns. This paper explores how to best handle seasonal drift in the specific context of news article categorization (or classification/tagging), where seasonal drift is overwhelmingly the main type of drift present in the data, and for which the data are high-dimensional. We introduce a novel classifier named Seasonal Averaged One-Dependence Estimators (SAODE), which extends the AODE classifier to handle seasonal drift by including tim...

Here, data on 50 265 Lophius piscatorius sampled between 1998 and 2006 on board commercial fishing vessels during observer trips and chartered surveys at Shetland, west of Scotland, and Rockall are analysed. In each area, length differed significantly with depth (p, 0.001), there was an increase in modal size with increasing depth down to 450 m, and large fish dominated hauls in deeper water. The sex ratio of all data combined was 0.88 females:1 male, but it varied by area, depth, and season, with males greatly out-numbering females in deep water west of Scotland during the first quarter of the year. The proportion at length that were female differed significantly with depth, and the highest proportions of mature fish were in deep water at Rockall and west of Scotland. L50 % maturities, for all data combined, were 102.4 cm for females and 58.3 cm for males.

Guidelines were obtained from France, Germany, Italy, Netherlands, Poland, Portugal, Sweden and the UK. Most guidelines recommend neuraminidase inhibitors over M2 inhibitors, but three countries were unclear or suggested M2 inhibitor use in some circumstances. Clinical ...

Food habits of co-occurring largemouth bass (Micropterus salmoides) and spotted bass (M. punctulatus) were documented in two New Mexico reservoirs, Brantley Lake and Sumner Lake, from May 2001 to May 2002. In Brantley Lake, bass ate mainly fish, whereas bass in Sumner Lake ate mainly crayfish. Food habits of both species varied seasonally and there was substantial overlap in the

All the storms and depressions that formed in the Bay of Bengal during 1974–99 have been analysed. The number of occurrences in July is not in harmony with that of other months of the monsoon. Regions stricken are taken into account on a monthly, seasonal and annual basis. The Indian coast faces almost an equal number of storms and depressions that are formed from June to November. The most vulnerable months for storms are May, October and November for Bangladesh; May for Myanmar; June, August and September for Kolkata–Vishakhapatnam in India and October and November for Vishakhapatnam–Tamilnadu in India. Most of the monsoon depressions cross the Kolkata–Vishakhapatnam coast of India. The frequency of formation has been observed to decrease during the period of analysis. It is also observed that the frequency distribution of the Bay of Bengal storms has two peaks: one in the month of May and the other in the month of November. Copyright © 2003 Royal Meteorological Society

Climate variability and change are expected to influence the seasonal cycle in North Pacific sub-arctic marine ecosystems. The hypothesis that timing of nesting and productivity of piscivorous seabirds [kittiwakes (Rissa tridactyla and Rissa brevirostris) and murres (Uria aalge and Uria lomvia)] at the Pribilof Islands are related to variation in ocean climate as indexed by changes in sea-ice concentrations (SICs)