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Partial difference sets with parameters (v,k,k,/x) = (v,(v— l)/2,(v — 5)/4,(v— l)/4) are called Paley partial difference sets. By using finite local rings, we construct a family of Paley PDSs for abelian/7-groups with any given exponent. Furthermore, we prove some non-existence results on Paley PDSs. Using these results, we prove that Paley PDSs exist in a(More)
Introduction The use of herbicides on corn has become common and important. In the United States, the herbicides used most often on corn in 1989 were alachlor, atrazine, butylate, cyanazine, dicamba, EPTC, metolachlor, and 2,4-D. The 1989 estimated use in the United States of these eight herbicides on corn was 89 x lo6 kg (1). In March 1994, the U.S. EPA(More)
Amide proton transfer (APT) imaging is a noninvasive molecular magnetic resonance imaging (MRI) technique based on the chemical exchange-dependent saturation transfer mechanism. The purpose of this study was to investigate the diagnostic performance of APT MRI in detecting intracranial hemorrhage (ICH) at hyperacute, acute and subacute stages by comparing(More)
Ultraweak biophoton emission of cutting-injured sweet potato is enhanced by the incubation with Ag nanoparticles in a nonlinear way. The late peak of the emission after the cutting injury is amplified as much as 15 times, while only little amplification was identified for the emission measured immediately after the cutting. The effect requires the presence(More)
Photothermal therapy (PTT) for cancer treatment is the use of heat between 41 degrees C and 45 degrees C to damage cancer cells. As a new type of transducer agent for PPT of cancer, CuS nanoparticles have several advantages over gold nanostructures. The most favorable features are the low cost, simple and easy preparation, and small size for targeting.(More)
AIM In this study, Ce(3+)-doped lanthanum(III) fluoride (LaF3:Ce(3+)) nanoparticles were synthesized by a wet-chemistry method in dimethyl sulfoxide (DMSO) and their application as an intracellular light source for photodynamic activation was demonstrated. MATERIALS & METHODS The LaF3:Ce(3+)/DMSO nanoparticles have a strong green emission with a peak at(More)
Ultraweak intrinsic bioluminescence of cancer cell is a noninvasive method of assessing bioenergetic status of the investigated cells. This weak biophoton emission generated by prostate cancer cells (PC3) was measured in the presence of Ag nanoparticles and its correlation with singlet oxygen production was investigated. The comparison between nanoparticles(More)
Photodynamic therapy (PDT) has attracted ever-growing attention as a promising modality in the treatment of cancer. However, due to the poor tissue penetration by light, PDT has rarely been applied for treating deep-seated tumors. This problem can be solved if photosensitizers are activated by X-rays, which are able to penetrate deeply into tissues.(More)
In this letter, we consider the problem of estimating gain-phase and position errors for constellation synthetic aperture radar (SAR) systems. In the conventional method, the position error estimation is based on the first-order Taylor series expansion of the position-error exponential function. However, the first-order Taylor series expansion causes an(More)