Recently there has been a surge in econometric work focusing on estimating average treatment effects under various sets of assumptions. One strand of this literature has developed methods for estimating average treatment effects for a binary treatment under assumptions variously described

In the setting of ‘‘affine’ ’ jump-diffusion state processes, this paper provides an analytical treatment of a class of transforms, including various Laplace and Fourier transforms as special cases, that allow an analytical treatment of a range of valuation and econometric problems. Example

of various entities. Included are nonmonotonic treatments of is-a hierarchies, the unique names hypothesis, and the frame problem. The new circumscription may be called formula circumscription to distinguish it from the previously defined domain circumscription and predicate circumscription. A still more

. In this article, we introduce Globus, a system that we are developing to address these challenges. The Globus system is intended to achieve a vertically integrated treatment of application, middleware, and network. A low-level toolkit provides basic mechanisms such as communication, authentication, network

The toxicity of vinylidene chloride (VDC) was studied in mice and rats exposed to various concentrations of the vapors for 23 hr/day. In addition, the ability of various treatments to alter parameters of toxicity was evaluated. Mice were more sensitive than rats both to the acute lethal

, if discharged without proper treatment, severely pollute receiving water bodies. In this article, the various recent advancements in the treatment of dairy wastewater have been discussed and stress is given on the lowest cost of the best possible treatment.

The coleorhiza or root sheath of the grasses has received little attention from plant physiologists and experimental morphologists. Nevertheless it is of im-portance in the germination of the oat seed and is interesting in its responses to certain factors in its immediate environment. In a number of cultures of excised oat embryos, extreme coleorhizal elongations were observed. Such elongations occurred regularly in liquid media. However, the coleorhizae of oat embryos cultured on the surface of nutrient agar elongated only slightly. Instead they produced numerous epidermal hairs which appeared to be identical to root hairs. These phenomena have been reported by other investigators. Nishimura (1922) and Howarth (1927) consider that such coleorhizal hairs serve to supply water to the embryo during germination. Dietrich (1924) discovered that greatly lengthened coleorhizae were developed in subsurface cultures of excised oat embryos. LaRue (1936) observed that immature, excised embryos of certain grasses formed coleorhizal hairs in vitro. Normally the coleorhiza is the first part of the oat embryo to break through

THE ability to hold fowl semen for a period of several days and still get satisfactory fertility when used would be of utmost importance to the poultry industry. Numerous diluents have been tried for dilut-ing fowl semen for storage and to extend its usage. Motohashi and Moritomo (1927) compared the motility of cock sperm in whole egg white diluted with distilled water, Ringer's solution, physiological salt solution (0.75%) and dextrose solution (6%). They found that motility was excel-lent in Ringer's solution and somewhat poorer and about equal in the diluted egg white and physiological salt solution. Poor results were obtained with the dextrose solution. The motility of the sperm was decreased by increasing the amount of dis-tilled water to the egg white. A modified Ringer's solution, identical with the one used in this experiment, was used by Bonnier and Trulsson (1939) who found that when a mixture of 30 % semen and 70 % Ringer's solution was used, better fertility was obtained than with undiluted semen. When the semen was diluted one to ten, fertility was as good as that obtained with undiluted semen. A one to fifty dilu-tion gave decidedly lower fertility. Schind-ler et al. (1955) used a dilution rate of one part of semen to three parts of Ringer's solution and found that fertility of the diluted semen was almost as great as that of undiluted semen when inseminated imme-diately after collection or at two and four hours storage, but gave significantly lower fertility than the undiluted controls after

-Bf) antibodies that may play major role in the immunologic failure of pregnancy and may lead to abortion. Alter-ation in the expression of HLA-G molecules, T-helper-1 (Th-1) pattern of cytokines and natural killer (NK) cells activity may also induce abortion. Various forms of treatment like antithrombotic

A theoretical framework for viewing health services utilization is presented, emphasizing the importance of the (1) characteristics of the health services delivery system, (2) changes in medical technology and social norms relating to the definition and treatment of illness, and (3) individual