Modeling the System Parameters of 2M1533+3759: A New Longer-Period Low-Mass Eclipsing sdB+dM Binary

We present new photometric and spectroscopic observations for 2M 1533+3759 (= NSVS 07826147). It has an orbital period of 0.16177042 day, significantly longer than the 2.3--3.0 hour periods of the other known eclipsing sdB+dM systems. Spectroscopic analysis of the hot primary yields Teff = 29230 +/- 125 K, log g = 5.58 +/- 0.03 and log N(He)/N(H) = -2.37 +/- 0.05. The sdB velocity amplitude is K1 = 71.1 +/- 1.0 km/s. The only detectable light contribution from the secondary is due to the surprisingly strong reflection effect. Light curve modeling produced several solutions corresponding to different values of the system mass ratio, q(M2/M1), but only one is consistent with a core helium burning star, q=0.301. The orbital inclination is 86.6 degree. The sdB primary mass is M1 = 0.376 +/- 0.055 Msun and its radius is R1 = 0.166 +/- 0.007 Rsun. 2M1533+3759 joins PG0911+456 (and possibly also HS2333+3927) in having an unusually low mass for an sdB star. SdB stars with masses significantly lower than the canonical value of 0.48 Msun, down to as low as 0.30 Msun, were theoretically predicted by Han et al. (2002, 2003), but observational evidence has only recently begun to confirm the existence of such stars. The existence of core helium burning stars with masses lower than 0.40--0.43 Msun implies that at least some sdB progenitors have initial main sequence masses of 1.8--2.0 Msun or more, i.e. they are at least main sequence A stars. The secondary is a main sequence M5 star.Comment: 47 pages, 7 figure

Directions of Ground-Water Flow and Locations of Ground-Water Divides in the Lost River Watershed Near Orleans, Indiana

The Mitchell Plain, a physiographic unit in south central Indiana, is a classic example of karst topography. Thetown of Orleans, Ind., which is in the Mitchell Plain, is a site of frequent flooding. Factors that enhance the potential for flooding in Orleans may include (1) location of the town in a karst valley, (2) a high runoff-rainfall relation for a loess- and residuum-covered area that drains into an occluded sinkhole near the center of Orleans, and (3) an overtaxed subsurface- drainage system during periods of intense rainfall. The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers, conducted a study during October 1993-April 1994 to improve an understanding of the hydrology of the Lost River Watershed near Orleans

Directions of Ground-Water Flow and Locations of Ground-Water Divides in the Lost River Watershed Near Orleans, Indiana

The Mitchell Plain, a physiographic unit in south central Indiana, is a classic example of karst topography. Thetown of Orleans, Ind., which is in the Mitchell Plain, is a site of frequent flooding. Factors that enhance the potential for flooding in Orleans may include (1) location of the town in a karst valley, (2) a high runoff-rainfall relation for a loess- and residuum-covered area that drains into an occluded sinkhole near the center of Orleans, and (3) an overtaxed subsurface- drainage system during periods of intense rainfall. The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers, conducted a study during October 1993-April 1994 to improve an understanding of the hydrology of the Lost River Watershed near Orleans

Use of isotopes to identify sources of ground water, estimate ground-water-flow rates, and assess aquifer vulnerability in the Calumet Region of northwestern Indiana and northeastern Illinois /

Shipping list no.: 2003-0078-P.Includes bibliographical references (p. 58-60).Mode of access: Internet

Female Mice Are Protected from Metabolic Decline Associated with Lack of Skeletal Muscle HuR

Male mice lacking HuR in skeletal muscle (HuRm−/−) have been shown to have decreased gastrocnemius lipid oxidation and increased adiposity and insulin resistance. The same consequences have not been documented in female HuRm−/− mice. Here we examine this sexually dimorphic phenotype. HuRm−/− mice have an increased fat mass to lean mass ratio (FM/LM) relative to controls where food intake is similar. Increased body weight for male mice correlates with increased blood glucose during glucose tolerance tests (GTT), suggesting increased fat mass in male HuRm−/− mice as a driver of decreased glucose clearance. However, HuRm−/− female mice show decreased blood glucose levels during GTT relative to controls. HuRm−/− mice display decreased palmitate oxidation in skeletal muscle relative to controls. This difference is more robust for male HuRm−/− mice and more exaggerated for both sexes at high dietary fat. A high-fat diet stimulates expression of Pgc1α in HuRm−/− male skeletal muscle, but not in females. However, the lipid oxidation Pparα pathway remains decreased in HuRm−/− male mice relative to controls regardless of diet. This pathway is only decreased in female HuRm−/− mice fed high fat diet. A decreased capacity for lipid oxidation in skeletal muscle in the absence of HuR may thus be linked to decreased glucose clearance in male but not female mice

Surface-Water and Karst Groundwater Interactions and Streamflow-Response Simulations of the Karst-Influenced Upper Lost River Watershed, Orange County, Indiana

The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers (USACE) and the Indiana Office of Community and Rural Affairs (OCRA), conducted a study of the upper Lost River watershed in Orange County, Indiana, from 2012 to 2013. Streamflow and groundwater data were collected at 10 data-collection sites from at least October 2012 until April 2013, and a preliminary Water Availability Tool for Environmental Resources (WATER)-TOPMODEL based hydrologic model was created to increase understanding of the complex, karstic hydraulic and hydrologic system present in the upper Lost River watershed, Orange County, Ind. Statistical assessment of the optimized hydrologic-model results were promising and returned correlation coefficients for simulated and measured stream discharge of 0.58 and 0.60 and Nash-Sutcliffe efficiency values of 0.56 and 0.39 for USGS streamflow-gaging stations 03373530 (Lost River near Leipsic, Ind.), and 03373560 (Lost River near Prospect, Ind.), respectively. Additional information to refine drainage divides is needed before applying the model to the entire karst region of south-central Indiana. Surface-water and groundwater data were used to tentatively quantify the complex hydrologic processes taking place within the watershed and provide increased understanding for future modeling and management applications. The data indicate that during wet-weather periods and after certain intense storms, the hydraulic capacity of swallow holes and subsurface conduits is overwhelmed with excess water that flows onto the surface in dry-bed relic stream channels and karst paleovalleys. Analysis of discharge data collected at USGS streamflow-gaging station 03373550 (Orangeville Rise, at Orangeville, Ind.), and other ancillary data-collection sites in the watershed, indicate that a bounding condition is likely present, and drainage from the underlying karst conduit system is potentially limited to near 200 cubic feet per second. This information will direct future studies and assist man