Transient first-order interference of two independent thermal light beams

By analyzing the first-order interference of two independent thermal light beams with both classical and quantum theories, we conclude that it is impossible to observe the transient first-order interference pattern by superposing two independent thermal light beams even if the degeneracy parameter of thermal light is much greater than one. The result suggests that the classical model of thermal light field within the coherence time may not be the same as the one of laser light field within the coherence time.Comment: 5 pages, 3 figures. Submitted for publication. Comments are welcom

Observation of Anticorrelation with Classical Light in a Linear Optical System

Two-photon anticorrelation is observed when laser and pseudothermal light beams are incident to the two input ports of a Hong-Ou-Mandel interferometer, respectively. The spatial second-order interference pattern of laser and pseudothermal light beams is reported. Temporal Hong-Ou-Mandel dip is also observed when these two detectors are at the symmetrical positions. These results are helpful to understand the physics behind the second-order interference of light.Comment: 5 pages, 4 figures. Comments are welcom

Therapeutic effect of percutaneous pedicle screw fixatio n, combined with Tongdu Huoxue decoction on thoracolumbar spine fracture

Purpose: To study the therapeutic effect of percutaneous pedicle screw fixation (PPSF) combined with Tongdu Huoxue decoction on thoracolumbar spine fractures. Methods: Ninety-eight patients with thoracolumbar spine fractures treated with PPSF were retrospectively enrolled and grouped into a study group (SG, n = 51, PPSF combined with THD), and a control group (CG, n = 47, PPSF). General surgical indices, postoperative pain, postoperative Oswestry dysfunction index (ODI index), preoperative and postoperative imaging indices, and postoperative hemodynamic indices were determined and recorded. Results: Patients in SG exhibited significantly lower visual analog scale (VAS) scores higher than those of CG at 3, 7 and 15 days after surgery (p < 0.05). At 15 and 30 days after surgery, patients in SG exhibited significantly lower ODI index than those in CG (p < 0.05). At day 60 after surgery, Cobb angle was lower in SG than in CG, while the injured vertebral body showed higher anterior height in SG than in CG. Furthermore, FIB and D-D were lower in SG than in CG at day 7, but exhibited higher PT than CG (p < 0.05). Conclusion: The combined application of PPSF and THD in patients with thoracolumbar fractures ameliorates postoperative pain levels, improves short-term spinal function, and significantly alters the postoperative coagulation index of patients, presumably by reducing the incidence of postoperative thrombosis. However, there is a need for further clinical trials prior to the introduction of this therapy into clinical practice

Allocating Capacity with Demand Competition: Fixed Factor Allocation*

We consider a supply chain consisting of a supplier and two retailers. The supplier sells a single product to the retailers, who, in turn, retail the product to customers. The supplier has limited production capacity, and the retailers compete for the supplier’s capacity and are duopolists engaged in Cournot competition for their customers. When the sum of the retailers’ orders exceeds the supplier’s capacity, the supplier allocates his capacity according to a preannounced allocation rule. We propose a new capacity allocation rule, fixed factor allocation, which incorporates the ideas of proportional and lexicographic allocations: it prioritizes retailers as in lexicographic allocation, but guarantees only a fixed proportion of the total available capacity to the prioritized retailer. We show that (1) the fixed factor allocation rule incorporates lexicographic and proportional allocations from the perspectives of the supplier and the supply chain; (2) under fixed factor allocation, the supply chain profit is not affected by the allocation factor when it is greater than a threshold; (3) the retailers share the supply chain profit with the supplier depending on the value of the allocation factor; and (4) the fixed factor allocation coordinates the supply chain when the market size is sufficiently large. We also compare fixed factor with proportional and lexicographic allocations, respectively. Furthermore, we demonstrate how the supplier can optimize his capacity level and wholesale price under fixed factor allocation.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/137548/1/deci12234.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/137548/2/deci12234_am.pd