Digital Commons Network^™

A Large Cervidae Holocene Accumulation In Eastern Brazil: An Example Of Extreme Taphonomical Control In A Cave Environment, Alex Hubbe, Augusto S. Auler

International Journal of Speleology

A remarkable cervid bone accumulation occurs at a single passage (named Cervid Passage; CP) at Lapa Nova, a maze cave in eastern Brazil. CP lies away from cave entrances, is a typical pitfall passage and contains bone remains of at least 121 cervids, besides few bats, peccaries and rodents remains. There is no evidence of water (or sediment) flow at the site and in general bones lack post depositional alterations and display anatomical proximity, suggesting that the majority of the remains found inside CP (mainly cervids) are due to animals that after entering the cave got trapped in the site. …

Cryogenic Fracturing Of Calcite Flowstone In Caves: Theoretical Considerations And Field Observations In Kents Cavern, Devon, Uk., Joyce Lundberg, Donald A. Mcfarlane

International Journal of Speleology

Several caves in Devon, England, have been noted for extensive cracking of substantial flowstone floors. Conjectural explanations have included earthquake damage, local shock damage from collapsing cave passages, hydraulic pressure, and cryogenic processes. Here we present a theoretical model to demonstrate that frost-heaving and fracture of flowstone floors that overlie wet sediments is both a feasible and likely consequence of unidirectional air flow or cold-air ponding in caves, and argue that this is the most likely mechanism for flowstone cracking in caves located in Pleistocene periglacial environments outside of tectonically active regions. Modeled parameters for a main passage in Kents …

Provenance And Geological Significance Of Red Mud And Other Clastic Sediments Of The Mugnano Cave (Montagnola Senese, Italy), Francesco Iacoviello, Ivan Martini

International Journal of Speleology

The Mugnano cave is characterized by a thick clastic sedimentary fill showing a great variability of sedimentary facies, ranging from clay to coarse-grained sand deposits. This paper deals with combined sedimentological and mineralogical (XRD and SEM) studies of these sediments and bedrock insoluble residues in order to understand the origin and geological significance of cave deposits, with particular attention to red mud sediments, often considered as the residue of host rock dissolution. Three different sedimentary facies were recognized: i) YS, yellow sand with occasionally shell fragments, testifying the arrival of sediments from the surrounding landscape; ii) RS, red laminated mud; …

Cover: Volume 41, Issue 2

International Journal of Speleology

No abstract provided.

Speleothem Microstructure/Speleothem Ontogeny: A Review Of Western Contributions, William B. White

International Journal of Speleology

Mineral ontogeny is the study of the growth and development of mineral deposits in general and, in the present context, speleothems in particular. Previous researchers, mainly in Russia, have developed a nomenclatural hierarchy based on the forms and habits of individual crystals and the assembly of individual crystals into both monomineralic and polymineralic aggregates (i.e. speleothems). Although investigations of the growth processes of speleothems are sparse, there is a large literature on growth processes of speleothem minerals and related crystals in the geochemical and materials science literature. The purpose of the present paper is to sort through the various concepts …

Editorial, Jo De Waele

International Journal of Speleology

No abstract provided.

World Karst Science Reviews

International Journal of Speleology

No abstract provided.

Excessive Internet Use Among European Children, David Smahel, Ellen Helsper, Lelia Green, Veronika Kalmus, Lukas Blinka, Kjartan Olafsson

Research outputs 2011

This report presents new findings and further analysis of the EU Kids Online 25-country survey regarding excessive use of the internet by children. It shows that while a number of children (29%) experienced one or more of the five components associated with excessive internet use, very few (1%) can be said to show pathological levels of use.

Excessive Internet Use Among Australian Children, Lelia Green, Khartan Olafsson, Danielle Brady, David Smahel

Research outputs 2011

This brief report builds upon the findings of the EU Kids Online project’s work into Excessive Internet Use among the 19,834 European children (aged 11-16) participating in that study. It compares the European data with the much smaller cohort of 300 Australian children (aged 11-16) who were researched in the parallel AU Kids Online project. In both cases the children were selected according to a random sampling strategy. The full EU Kids Online report includes the research methodology and can be accessed via: http://www2.lse.ac.uk/media@lse/research/EUKidsOnline/EU%20Kids%20II%20(2009- 11)/EUKidsOnlineIIReports/D4FullFindings.pdf

The full AU Kids Online report can be accessed via: http://cultural-science.org/journal/index.php/culturalscience/article/view/49/129.

The EU Kids …

Cross-Cultural Perspectives On College Students’ Beliefs, Values And Spirituality At Christian Institutions, Robson Moura Marinho, Jimmy Kijai, Zachary Y. Mngo, Natasha Smith

Faculty Publications

College student’s beliefs, values, and spirituality have become the focus of a major national research project in recent years, conducted by the Higher Education Research Institute (HERI) housed at University of California at Los Angeles (UCLA), and sponsored by a substantial grant from the John Templeton Foundation (HERI website). After a pilot survey conducted in 2003, the College Students' Beliefs and Values Survey (CSBV)was administered in the fall 2004 to 112,232 entering freshmen students of 236 colleges and universities in the United States, with a follow up sample of 15,000 of these students in spring 2007. As a nationally representative …

Coping Behaviour As An Adaptation To Stress: Post-Disturbance Preening In Colonial Seabirds, Shandelle M. Henson, Lynelle M. Weldon, James L. Hayward, Daniel Greene, Libby C. Megna, Maureen C. Serem

Faculty Publications

In humans, coping behaviour is an action taken to soothe oneself during or after a stressful or threatening situation. Some human behaviours with physiological functions also serve as coping behaviours, for example, comfort sucking in infants and comfort eating in adults. In birds, the behaviour of preening, which has important physiological functions, has been postulated to soothe individuals after stressful situations. We combine two existing modelling approaches – logistic regression and Darwinian dynamics – to explore theoretically how a behaviour with crucial physiological function might evolve into a coping behaviour. We apply the method to preening in colonial seabirds to …