2,859 research outputs found
Bio-Processes of the Oxidation Ditch When Subjected to a Sub-Arctic Climate
Alaska's far northern area is sparsely populated primarily because of a
severe climate which varies from northern temperate to Arctic. Construction
and power costs are high. Skilled operating personnel are scarce and
expensive, if available. Receiving streams are said to be delicate, particularily
in the winter, when little possibility for reaeration exists due to a total ice cover. The oxidation ditch modification of the extended aeration activated sludge process appears to be well suited for the
treatment of wastes in this environment. Past operating data on a plant
of this type located in Interior Alaska (near Fairbanks) indicated it may
be well suited to treat small volumes of domestic waste economically,
with low sludge production, and minimal sensitivity to low temperatures.The work reported on herein was done under Contract No. RFP DACA 897l-
R-0006 from the U. S. Army Cold Regions Research and Engineering
Laboratory, Hanover, New Hampshire
Oscillating magnetoresistance due to fragile spin structure in metallic GdPd
Studies on the phenomenon of magnetoresistance (MR) have produced intriguing
and application-oriented outcomes for decades--colossal MR, giant MR and
recently discovered extremely large MR of millions of percents in semimetals
can be taken as examples. We report here the investigation of oscillating MR in
a cubic intermetallic compound GdPd, which is the only compound that
exhibits MR oscillations between positive and negative values. Our study shows
that a very strong correlation between magnetic, electrical and
magnetotransport properties is present in this compound. The magnetic structure
in GdPd is highly fragile since applied magnetic fields of moderate
strength significantly alter the spin arrangement within the system--a behavior
that manifests itself in the oscillating MR. Intriguing magnetotransport
characteristics of GdPd are appealing for field-sensitive device
applications, especially if the MR oscillation could materialize at higher
temperature by manipulating the magnetic interaction through perturbations
caused by chemical substitutions.Comment: 10 pages, 7 figures. A slightly modified version is published in
Scientific Report
Antimicrobial activity of various extracts of whole plant of Anisomeles malabarica (Linn.) R. Br.
Anisomeles malabarica (Linn.) R.Br. is a traditional medicinal plant of Lamiaceae family, distributed throughout India. All the three extracts petroleum ether, Ethyl Acetate, methanol of Anisomeles malabarica (Linn.) R.Br. were tested for Antimicrobial efficacy against gram positive and gram negative bacterial and then fungal organisms. The methanolic extract of Anisomeles malabarica (Linn.) R.Br. were exhibited maximum antibacterial and anti fungal activity when compared with other two extracts. Hence it can be concluded that the methanolic extract of Anisomeles malabarica (Linn.) R.Br. possess a significant Antimicrobial activity. This also stands as a scientific support for the usage of this plant for wound healing
Password Authentication for multicast host using zero knowledge Proof
The password which is a more secure and valuable data should be highly protected from eavesdropper. This paper presents how password required for authentication of members of group communication is securely delivered by the source or initiator of the group. The password delivery uses zero knowledge proof and sent to the group member in an encrypted format using cipher block mode encryption. The password delivered is a One Time Password which can be used for certain amount of time in order to ensure a highly secure communication environment among the group
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