Unidirectional emission from a cardioid-shaped microcavity laser

We find unidirectional emission in a cardioid-shaped microcavity laser. When a deformation parameter is well adjusted, rays starting around a period-5 unstable periodic orbit emit unidirectionally. To confirm the emission direction, we fabricate a laser by using an InGaAsP semiconductor and investigate emission characteristics. When the laser is excited by current injection with a dc current, resonances localized on the period-5 unstable periodic orbit emit unidirectionally. © 2016 Optical Society of America.1

Metastasis to the breast from colonic adenocarcinoma

A 63-year-old woman was referred to a breast surgeon with a breast mass discovered incidentally during follow-up study after colon cancer surgery. Invasive adenocarcinoma was revealed on core needle biopsy. Wide excision of the breast including the tumor was performed. On standard histological examination the tumor showed features of moderately differentiated adenocarcinoma. The immunohistochemistry study revealed positive results for cytokeratin (CK)20 and CDX2, but negative for CK7. These are typical characteristics for colon cancer. Considering her history of subtotal colectomy for sigmoid colon cancer, it is presumable that the mass in the breast was of colonic origin, and it was an extremely rare case of metastasis to the breast from primary colorectal neoplasm. Although the instance is rare, clinicians should keep the possibility of breast metastasis from colorectal cancer in mind for early and correct diagnosis

siRNA targeting Livin decreases tumor in a xenograft model for colon cancer

AIM: To evaluate the effect of silencing Livin gene expression with siRNA to apoptosis and proliferation in a colon cancer cell line

OBSERVATIONS OF STRATOSPHERIC OZONE MIXING RATIO BY GROUND-BASED MILLIMETERWAVE MEASUREMENTS AT SOOKMYUNG WOMEN'S UNIVERSITY

$^{a}$J.J. OH (email address:[email protected]) express sincere thanks to Prof. de Zafra for his help on the data reduction.Author Institution: SookMyung Women's University; Departmentment of Chemistry, SookMyung Women's University; Departmentment of Chemistry, Taeduk Radio Astronomy ObservatoryThe $J = 6_{1,5} - 6_{0,6}$ rotational transition of stratospheric ozone at 110.8359 GHz has been observed using a Schottky diode mixer receiver at Sookmyung Women's University in Seoul during 8-26 March 2000 by the load switching method. The instrument consists of a millimeter wave receiver, a multi-channel spectrometer and a computer. The mixer block is cooled to a temperature of 20 K by a closed cycle refrigerator of liquid He and the system temperature was determined to be about 850 K. The observed spectrum has been analyzed to determine variations in the ozone mixing ratio at various altitudes above Seoul. The retrieval algorithm used to obtain the data will be discussed and the variations of the altitude profiles will be compared

Lasing characteristics of cardioid-shaped 2-D microcavity laser

Directional emission in a cardioid-shaped microcavity is investigated. When a microcavity laser deformed from a circular shape in polar coordinate is excited by current injection, it emits unidirectionally at a certain deformation parameter. We confirm the emission characteristics in an InGaAsP semiconductor laser. © 2015 IEEE