Design and development of a high-stiffness, high-resolution torque sensor

A sensor has been designed and tested for precise pointing applications. The device is able to sense extremely small rotary motion and is immune to cross-axis forces. The hardware and design characteristics of the torque sensor are presented. Test data, integrated control methodology, and future applications are included

Developing an Undergraduate Teaching Assistant Program in Communication: Values, Curriculum, and Preliminary Assessment

This article describes a case study of a Communication Undergraduate Teaching Assistant (UTA) program and reports a limited, preliminary assessment of the teaching effectiveness of 25 UTA. The article concludes by identifying various benefits and drawbacks of Communication UTA programs and offers recommendations for departments interested in developing similar programs. Communication faculty were initially skeptical of the idea of having undergraduates serve as teachers. This prompted discussions about the underlying values that might serve as building blocks of a UTA program. The label UTA is used to refer to a supervised teaching role occupied by an undergraduate. The role of UTA is viewed as a first formal step in the process of socialization for careers in higher education and related areas

A Toy Model of Flying Snake's Glide

We have developed a toy model of flying snake's glide [J.J. Socha, Nature vol. 418 (2002) 603.] by modifying a model for a falling paper. We have found that asymmetric oscillation is a key about why snake can glide. Further investigation for snake's glide will provide us details about how it can glide without a wing.Comment: 6 pages, to be submitted to J. Phys. Soc. Jpn. Revised Version submitted to the abov

Kebijakan Parkir Kota Batam Dalam Meningkatkan Pendapatan Asli Daerah

The growth rate of motor vehicles in Batam City in recent years runs very rapidly. This levy will increase the original revenue of Batam City, But the implementation of the policy of Bylaw No.1 / 2012 on parking that has been running for three years (2012-2015) does not generate significant revenue on parking charges. The Purpose of this research is how the implementationn of parking management system based on evaluation of the policy of Bylaw No.1 / 2012 on parking Btam City. Data retrieval method is done by observation and documentation. Informant selection technique is done by purposive sampling, technical data analysis is done by data reduction, data presentation and conclusion drawing. The result of the research is that the policy of Batam City Government in increasing its achievement PAD not yet optimal, due to some obstacles such as: parking management system is not feasible, there is no public satisfaction survey index to measure the extent to which the achievement of parking policy in Batam City, Human Power that needs coaching and training. Its solution of Batan City government re-filed Ranpeda about parking with the intention of changing parking rates, changing the system of parking management and service facility improvemen

GENETIC AND PHENOTYPIC PARAMETERS ESTIMATED FROM NEBRASKA SPECI FIC-PATHOGEN-FREE SWINE FIELD RECORDS

Records collected during 1971 through 1979 from 101,606 hogs raised in 18 Nebraska Specific Pathogen Free herds were analyzed. Traits considered were backfat at 100 kg (BF), weight at 140 d of age (WT) and, in some analyses, number of live pigs/litter at birth (NBA). The phenotypic correlation of BF and WT, averaged across herds, was -.07. The correlations between BF and NBA and between WT and NBA were .04 and -.05, respectively. Average phenotypic standard deviations for BF, WT and NBA were 2.6 mm, 8.8 kg and 2.0 pigs. Estimates of the heritability of BF and WT were lower than most estimates reported from university research herds. Within breed, herd and sex estimates of heritability ranged from -.22.and .51 (unweighted Χ̅ = .16 ± .025) for BF and ranged from -.28 to .49 (Χ̅ = .16 ± .016) for WT. Estimates of the genetic correlation between BF and WT were extremely variable (Χ̅ = -.62 ± 14.3, range = -9.42 to 1.30) among breed-herd-sex subclasses

Synchrotron X-Ray Visualisation of Ice Formation in Insects during Lethal and Non-Lethal Freezing

Although the biochemical correlates of freeze tolerance in insects are becoming well-known, the process of ice formation in vivo is subject to speculation. We used synchrotron x-rays to directly visualise real-time ice formation at 3.3 Hz in intact insects. We observed freezing in diapausing 3rd instar larvae of Chymomyza amoena (Diptera: Drosophilidae), which survive freezing if it occurs above −14°C, and non-diapausing 3rd instar larvae of C. amoena and Drosophila melanogaster (Diptera: Drosophilidae), neither of which survive freezing. Freezing was readily observed in all larvae, and on one occasion the gut was seen to freeze separately from the haemocoel. There were no apparent qualitative differences in ice formation between freeze tolerant and non-freeze tolerant larvae. The time to complete freezing was positively related to temperature of nucleation (supercooling point, SCP), and SCP declined with decreasing body size, although this relationship was less strong in diapausing C. amoena. Nucleation generally occurred at a contact point with the thermocouple or chamber wall in non-diapausing larvae, but at random in diapausing larvae, suggesting that the latter have some control over ice nucleation. There were no apparent differences between freeze tolerant and non-freeze tolerant larvae in tracheal displacement or distension of the body during freezing, although there was markedly more distension in D. melanogaster than in C. amoena regardless of diapause state. We conclude that although control of ice nucleation appears to be important in freeze tolerant individuals, the physical ice formation process itself does not differ among larvae that can and cannot survive freezing. This suggests that a focus on cellular and biochemical mechanisms is appropriate and may reveal the primary adaptations allowing freeze tolerance in insects

A plesiosaur containing an ichthyosaur embryo as stomach contents from the Sundance Formation of the Bighorn Basin, Wyoming

Herein we report the discovery of an ichthyosaur embryo from the Upper Member of the Sundance Formation (Oxfordian) of the Bighorn Basin, Wyoming. The specimen is the first known ichthyosaur embryo from the Upper Jurassic, and is the first Jurassic ichthyosaur embryo from North America. The embryo was discovered in close association with the abdomen of an articulated partial plesiosaur skeleton, and several lines of evidence support the interpretation of the embryo as plesiosaur stomach contents. The small size and extremely poor ossification of the embryo indicate that the animal was probably not a neonate. Although the taxonomic affinities of the fossil are unknown, the large ichthyosaurian (sensu stricto) Opthalmosaurus natans is the only known ichthyosaur from the Sundance Formation, and the embryo may belong to that taxon