6.2 Dual labour market theory According to this theory, the labour market is composed of self-contained sub-markets or segments. Segmentation economists argue that ignoring the different identities of these segments and the constraints they place on the workers makes it impossible to understand the nature of labour market disadvantage. Basically, the dual approach hypothesises that a dichotomy has developed over time between a high-wage primary segment and a low-wage secondary segment. Working conditions in the primary se
According to this theory, the labour market is composed of self-contained sub-markets or segments. Segmentation economists argue that ignoring the different identities of these segments and the constraints they place on the workers makes it impossible to understand the nature of labour market disadvantage. Basically, the dual approach hypothesises that a dichotomy has developed over time between a high-wage primary segment and a low-wage secondary segment. Working conditions in the primary se
Explorers of North America
Explorers of North America Using the map given in class for the United States, draw the paths of explorers.
What time is it?
Students will practice telling time to the hour, half hour, and minute.
Help the Zoo!
Help the workers and animals at Henry Doorly Zoo! Research animals to find which habitat would be best for them and why.
Get Healthy, Eat The Pyramid!
The kind of food you eat makes a difference in how you feel and even how you are able to think in school. This activity will give you the chance to learn how to keep your body happy and healthy!
Inquiry or Problem Based Learning Lesson
You are an up and coming scientist determined to help find the best alternative fuel. You need to choose an alternative fuel from the list provided, research your choice using the links and prepare a report for your local government about the new fuel source.
Honeybee Venom Detected by Enzyme Immunoassay
The venom of the honeybee, Apis mellifera, contains numerous enzymes, volatiles, and other components. Allergic individuals develop anti-venom antibodies which may cause hives, anaphylactic shock, and death. In this exercise students detect concentrations of bee venom on nitrocellulose membranes following incubation of membranes with anti-venom antibodies, enzyme-conjugated secondary antibodies, and a colorimetric substrate. The intensity of the colored substrate deposited on the membrane is pro
Chicken Skeleton - Ball and Socket Joint (Limb)
The chicken has wings modified for flight, although it spends much it its time on ground. The bones are very light and long with finger-like ends. The ball and socket joint and hinge joint allow the chicken to move its wing in different directions.
Earth Rotation from Galileo Imagery: 3600 x Real-Time
This animation is one in a series created to show an accurate representation of the Earths rotation at different temporal resolutions. The animation is created from images taken by the Galileo spacecraft during a close pass of the Earth on December 11-12, 1990. The animations range from real-time, in which no rotation can be perceived, to 3600 times real-time, in which both the Earths rotation and cloud motion can bee seen. The series also includes an animation in which the Earths rotation has b
Molecular Classification - Prof. Chris Man (Part 2)
Recent advances in genomic and proteomic technologies have revolutionized our way of classifying diseases. These high-throughput technologies allow the development of powerful and multivariate classifiers to distinguish different diseases or tumors based on their molecular profiles. Molecular classification provides a new way to distinguish histologically similar but molecularly different types of tumors, and hence improves tumor diagnosis and prognosis. In this course, we introduce major concep
Multipolar representation of protein structure
Background That the structure determines the function of proteins is a central paradigm in biology. However, protein functions are more directly related to cooperative effects at the residue and multi-residue scales. As such, current representations based on atomic coordinates can be considered inadequate. Bridging the gap between atomic-level structure and overall protein-level functionality requires parameterizations of the protein structure (and other physicochemical properties) in a quasi-co
Methylphenidate Decreased the Amount of Glucose Needed by the Brain to Perform a Cognitive Task
The use of stimulants (methylphenidate and amphetamine) as cognitive enhancers by the general public is increasing and is controversial. It is still unclear how they work or why they improve performance in some individuals but impair it in others. To test the hypothesis that stimulants enhance signal to noise ratio of neuronal activity and thereby reduce cerebral activity by increasing efficiency, we measured the effects of methylphenidate on brain glucose utilization in healthy adults. We measu
Drawing Shadows to Stone: Photographing North Pacific Peoples
This Web site, created to complement an American Museum of Natural History exhibition, takes a look at an anthropological expedition to record the people and cultures of the North Pacific.
Paradise Redefined: Part 2
A journey to a coral reef chain hidden in the Central Pacific forces scientists to revisit the definition of a pristine environment. Part Two.
Obesity is Socially Contagious
Are your friends making you fat? Or keeping you slender? According to new research from Harvard and the University of California, San Diego, the short answer on both counts is "yes.”
NetMHCpan, a Method for Quantitative Predictions of Peptide Binding to Any HLA-A and -B Locus Protei
Background Binding of peptides to Major Histocompatibility Complex (MHC) molecules is the single most selective step in the recognition of pathogens by the cellular immune system. The human MHC class I system (HLA-I) is extremely polymorphic. The number of registered HLA-I molecules has now surpassed 1500. Characterizing the specificity of each separately would be a major undertaking. Principal Findings Here, we have drawn on a large database of known peptide-HLA-I interactions to develop a
Orchidaceae Morphology: Oncidium cultivar
Orchid morphology of Oncidium. Structures labeled include: petals; sepals; callus; column; column wings; stigma; pollinia and anther cap. Includes a dissection that removes the anther cap to expose the pollinia.
Open genius: strumento per una scienza libera
The presentation of the researcher Andrea Gaggioli about a new way to finance the scientific research: crowd funding. Le nuove tecnologie partecipative possono trasformare radicalmente la ricerca scientifica. Strumenti emergenti quali il crowdsourcing e il crowdfunding possono contribuire a rendendere la scienza un'impresa più aperta, trasparente e democratica. Questo intervento video esplora questi strumenti e introduce Open*Genius, una piattaforma 2.0 per aiutare i ricercatori a trovare le ri
Mice, Men, and Mental Illness: Animal Model of Human Mental Disorders
Mice, Men, and Mental Illness: Animal Model of Human Mental Disorders. Dr. Eric Kandel's lecture.
TRMM Rainmap for September 1998: Africa
Monthly average rainfall over Africa for September 1998 as measured by TRMM. High rainfall rates are in red.