For a learning platform to be adaptive, it needs to monitor the user in real-time. At the ScienceCampus Tübingen, we conduct empirical research on learning strategies, in particular with regard to system adaptivity. Our experimental Web-based adaptive multimedia learning environment is able to communicate with an eye-tracking system in real-time, and links gaze data to browser-based learning co...

A workshop cosponsored by the National Institute of Environmental Health Sciences and the National Institute for Occupational Safety and Health was convened in Washington, DC, on 17-18 October 2001 with the goal of developing a consensus document on the most appropriate experimental approaches and assays available to assess developmental immunotoxicity. The work group was composed of scientists...

1. Wright's method for the study of chemotaxis of leucocytes in vitro, slightly modified, has been found to be most satisfactory in the estimation of the degree of chemotaxis of various substances, because it is possible to make an exact quantitative determination of the leucocytes that have migrated from the blood clot and adhere to the surfaces containing the tested substance. 2. The calcium ...

The hypothesis that a toxic hemolytic substance could be recovered from the stools of pernicious anemia patients was investigated. Saline stool extracts of patients suffering from pernicious anemia and those of normal individuals were administered to rabbits by intravenous and subcutaneous injection over long periods of time. Stool extracts prepared by the special technique of Seyderhelm (1) we...

Studies in Cucinogenesis. V. Methyl Derivatives of 1 : 2-Benzanthracene, M. J. SHEAR. In a further contribution to his series of studies on carcinogenesis Shear records his experiments with the methyl derivatives of 1 : 2-benzanthracene and related compounds. Of 21 compounds examined 10 produced tumors in mice a t the injection site. The more potent carcinogenic compounds were 5 : 10-dimethyl-1...

An active transmissible virus exists in the blood of measles patients during the eruptive stage of the disease. This virus produces in rabbits after intravenous injection a specific reaction analogous in all essential features to that of the human infection. Following a definite incubation period of from 2 to 5 days the animals infected show pyrexial, leucocytic, and cutaneous alterations. Full...

By AKIRA S. KA IoTo, I\I.D. I x A P1IEVIOUS PAPER on exj)erimental leukemia’ the author has demonstrated that various kinds of human leukemias could he transmitted serially to fowls 1w cell-free filtrates. Liver emulsions (lerive(i form 7 cases of leukemia (acute ttlRl chronic myeloid or lymphatic leukemia, chloroleukemia, aleukemic lymphatic leukemia afl(1 myelosis erythraemica,2 were administ...

1. The infectious agent from fatal cases of St. Louis and Kansas City encephalitis passes Seitz pads in high dilution without appreciable loss of infectivity and traverses collodion membranes with an average pore size of 66 mmicro or greater. 2. It is highly infectious for mice by the intracerebral and intranasal routes, but practically innocuous by the subcutaneous and intraperitoneal routes. ...