3,212 research outputs found
Tool post modification allows easy turret lathe cutting-tool alignment
Modified tool holder and tool post permit alignment of turret lathe cutting tools on the center of the spindle. The tool is aligned with the spindle by the holder which is kept in position by a hydraulic lock in feature of the tool post. The tool post is used on horizontal and vertical turret lathes and other engine lathes
Development and implementation of the verification process for the shuttle avionics system
The background of the shuttle avionics system design and the unique drivers associated with the redundant digital multiplexed data processing system are examined. With flight software pervading to the lowest elements of the flight critical subsystems, it was necessary to identify a unique and orderly approach of verifying the system as flight ready for STS-1. The approach and implementation plan is discussed, and both technical problems and management issues are dealt with
Establishing Volume Reduction Goals and Reducing Stormwater Runoff Using Low Impact Development to Improve Coastal Water Quality
Despite the Clean Water Act (CWA), passed by Congress in 1972, coastal water quality has continued to decline. The primary reason is the Act’s failure to adequately deal with stormwater runoff, the leading source of water pollution in coastal areas. Coastal development causes the velocity and volume of rainwater running off the land to increase, picking up pollutants in the process. Traditional stormwater systems convey that runoff directly into watersheds and coastal waters. Alternatives to the tradition stormwater systems exist that prevent runoff, instead of conveying it off the land as fast as possible. Low impact development (LID) is one option that uses a variety of techniques to mimic the lands natural hydrology by holding rainwater on the land and allowing it to infiltrate the soil. LID incorporate fairly simple measures, such as disconnecting downspouts from impervious surfaces, using rain barrels to capture runoff, and installing rain gardens, to reduce the runoff from development.
Reducing stormwater runoff can be an effective way to improve water quality in areas where waters are not meeting their designated uses established under the CWA. This can be done by bringing runoff levels back to historically acceptable volumes. This analysis uses the methods in the NC Coastal Federation’s Watershed Restoration Planning Guidebook to establish a stormwater runoff volume reduction goal by calculating the increase in runoff between 2004 and 2013 in Beaufort, NC. The study demonstrates the ease of setting reduction goals using the NCCF guidebook methods. It then presents various LID techniques as a cost effective approach to meet the reduction target.
The results for the 9-year period show a 7% increase in stormwater runoff volumes. The estimated increase in runoff volume was 423.876 acre-feet. The runoff rate went from 54% to 61%. This correlates closely with the increase seen in impervious surfaces in the study area. Impervious cover went from 29% in 2004, up to 37% in 2013, an 8% increase
Understanding of Emotions and Emotion Regulation in Adolescent Females with Conduct Problems: A Qualitative Analysis
Adolescent girls with conduct problems were interviewed regarding their (a) understanding of positive and negative emotions, (b) parental context of experiencing emotions, (c) ways of regulating emotions, (d) success in emotion regulation, and (e) use of alternative strategies in dealing with emotions. It was found that the girls have relatively little understanding of their negative internal states and/or are unable to express them to others, especially to fathers. They have few successful strategies for regulating negative emotions in themselves and others and are unaware of alternative strategies. This dysregulatory pattern likely prevents them from learning more appropriate ways of expressing and constructively handling their negative emotions that are necessary for healthy adjustment
Supply chain analysis of Gabilan Manufacturing Inc.
MBA Professional ReportThe purpose of this MBA Project was to investigate and provide alternative supply chain management strategies to assist Gabilan Manufacturing Inc. in reducing supply chain costs. This project was conducted with the sponsorship and assistance of Gabilan Manufacturing Inc. There were two primary goals of this project. The first was to identify and document the impact of forecasting errors in an environment where customer forecasts are available to the vendor. The second was to investigate the costs associated with relocating cutting operations as well as the procurement impact of a new cutting machine. Both of these goals relate directly to the overall effort to reduce supply chain costs without a loss of service level to Gabilan's customer.http://archive.org/details/supplychainnalys109459821Lieutenant Commander, United States NavyLieutenant, United States NavyApproved for public release; distribution is unlimited
Intestinal fungi contribute to development of alcoholic liver disease
This study was supported in part by NIH grants R01 AA020703, U01 AA021856 and by Award Number I01BX002213 from the Biomedical Laboratory Research & Development Service of the VA Office of Research and Development (to B.S.). K.H. was supported by a DFG (Deutsche Forschungsgemeinschaft) fellowship (HO/ 5690/1-1). S.B. was supported by a grant from the Swiss National Science Foundation (P2SKP3_158649). G.G. received funding from the Yale Liver Center NIH P30 DK34989 and R.B. from NIAAA grant U01 AA021908. A.K. received support from NIH grants RC2 AA019405, R01 AA020216 and R01 AA023417. G.D.B. is supported by funds from the Wellcome Trust. We acknowledge the Human Tissue and Cell Research (HTCR) Foundation for making human tissue available for research and Hepacult GmbH (Munich, Germany) for providing primary human hepatocytes for in vitro analyses. We thank Dr. Chien-Yu Lin Department of Medicine, Fu-Jen Catholic University, Taiwan for statistical analysis.Peer reviewedPublisher PD
Emotional engagements predict and enhance social cognition in young chimpanzees
Social cognition in infancy is evident in coordinated triadic engagements, that is, infants attending jointly with social partners and objects. Current evolutionary theories of primate social cognition tend to highlight species differences in cognition based on human-unique cooperative motives. We consider a developmental model in which engagement experiences produce differential outcomes. We conducted a 10-year-long study in which two groups of laboratory-raised chimpanzee infants were given quantifiably different engagement experiences. Joint attention, cooperativeness, affect, and different levels of cognition were measured in 5- to 12-month-old chimpanzees, and compared to outcomes derived from a normative human database. We found that joint attention skills significantly improved across development for all infants, but by 12 months, the humans significantly surpassed the chimpanzees. We found that cooperativeness was stable in the humans, but by 12 months, the chimpanzee group given enriched engagement experiences significantly surpassed the humans. Past engagement experiences and concurrent affect were significant unique predictors of both joint attention and cooperativeness in 5- to 12-month-old chimpanzees. When engagement experiences and concurrent affect were statistically controlled, joint attention and cooperation were not associated. We explain differential social cognition outcomes in terms of the significant influences of previous engagement experiences and affect, in addition to cognition. Our study highlights developmental processes that underpin the emergence of social cognition in support of evolutionary continuity
Planetary companions around the metal-poor star HIP 11952
Aims. We carried out a radial-velocity survey to search for planets around
metal-poor stars. In this paper we report the discovery of two planets around
HIP 11952, a metal-poor star with [Fe/H]= -1.9 that belongs to our target
sample. Methods. Radial velocity variations of HIP 11952 were monitored
systematically with FEROS at the 2.2 m telescope located at the ESO La Silla
observatory from August 2009 until January 2011. We used a cross-correlation
technique to measure the stellar radial velocities (RV). Results. We detected a
long-period RV variation of 290 d and a short-period one of 6.95 d. The
spectroscopic analysis of the stellar activity reveals a stellar rotation
period of 4.8 d. The Hipparcos photometry data shows intra-day variabilities,
which give evidence for stellar pulsations. Based on our analysis, the observed
RV variations are most likely caused by the presence of unseen planetary
companions. Assuming a primary mass of 0.83 M\odot, we computed minimum
planetary masses of 0.78 MJup for the inner and 2.93 MJup for the outer planet.
The semi-major axes are a1 = 0.07 AU and a2 = 0.81 AU, respectively.
Conclusions. HIP 11952 is one of very few stars with [Fe/H]< -1.0 which have
planetary companions. This discovery is important to understand planet
formation around metal-poor starsComment: Published in A&
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