8,185 research outputs found
Septemaleurodes Dubey, gen. n.
No full text<i>Septemaleurodes</i> Dubey gen. n. <p> Type species: <i>Dialeurolonga swainei</i> Martin, 1999: 70. Holotype puparium. Australia: Queenland, Broadbeach, viii-ix.1970, G. Swaine, on <i>Ficus</i> sp., in Australian National Insect Collection, Canberra [Not examined].</p> <p> <b>Diagnosis</b>: Puparium jet black, pit-forming, broadly oval; sexually dimorphic; thoracic tracheal pores opening deeply invaginated. Dorsum not separated from dorsal disc, submedian and subdorsum variably pigmented. Longitudinal and transverse moulting sutures reaching margin; pro-mesothoracic division much exaggerated but not suture-like; median length of abdominal segment VII much reduced than VI; pockets reaching border of segments VI/VII. Anterior and posterior marginal setae present. Cephalic and eighth abdominal setae present. First abdominal setae absent. Eye spots present. Caudal and thoracic tracheal furrows absent. Vasiform orifice cordate; operculum elliptical, covering basal two-thirds of orifice. Ventrally tracheal folds stippled.</p> <p> <b>Etymology</b>: The genus name is coined from a Latin word ‘ <i>septem’</i> meaning ‘seven’, in reference to the reduced seventh abdominal segment, and a suffix – <i>aleurodes</i>.</p> <p> <b>Remarks</b>: This new genus differs from <i>Dialeurolonga</i> in the puparial outline, and by the presence of deeply invaginated tracheal pore openings, eye spots, subcordate vasiform orifice, medially reduced abdominal segment VII, a pronounced meso-metathoracic suture, and by the absence of caudal furrow and first abdominal setae, punctured dorsum, and median pore on abdominal segment VIII. It also differs from <i>Dialeurodes</i> by the absence of caudal furrow, deeply invaginated tracheal pores, presence of eye spots and the much reduced median length of abdominal segment VII. Martin (1999) indicated similarity of <i>S</i>. <i>swainei</i> with <i>D</i>. <i>rhamni</i> Takahashi and <i>D</i>. <i>trialeuroides</i> Takahashi. However, both of these differ from the above generic diagnosis and are not assignable to <i>Septemaleurodes</i>.</p>Published as part of <i>Dubey, Anil Kumar, 2013, Dialeurolonga re-defined (Hemiptera: Aleyrodidae): with a new genus and species from India, two new genera from Australia, and discussion of host-correlated puparial variation, pp. 548-562 in Zootaxa 3616 (6)</i> on page 560, DOI: 10.11646/zootaxa.3616.6.2, <a href="http://zenodo.org/record/222493">http://zenodo.org/record/222493</a>
Grasping and control issues in adaptive end effectors
No full textResearch into robotic grasping and manipulation has led to the development of a large number of tendon based end effectors. Many are, however, developed as a research tool, which are limited in application to the laboratory environment. The main reason being that the designs requiring a large number of actuators to be controlled. Due to the space and safety requirements, very few have been developed and commissioned for industrial applications. This paper presents design of a rigid link finger operated by a minimum number of actuators, which may be suitable for a number of adaptive end effectors. The adaptive nature built into the end effector (due to limited number of actuators) presents considerable problems in grasping and control. The paper discusses the issues associated with such designs. The research can be applicable to any adaptive end effectors that are controlled by limited number of actuators and evaluates their suitability in industrial environments
A dynamic tactile sensor on photoelastic effect
No full textCertain photoelastic materials exhibit birefringent characteristics at a very low level of strain. This property of material may be suitable for dynamic or wave propagation studies, which can be exploited for designing tactile sensors. This paper presents the design, construction and testing of a novel dynamic sensor based on photoelastic effect, which is capable of detecting object slip as well as providing normal force information. The paper investigates the mechanics of object slip, and develops an approximate model of the sensor. This allows visualization of various parameters involved in the sensor design. The model also explains design improvements necessary to obtain continuous signal during object slip. The developed sensor has been compared with other existing sensors and experimental results from the sensor have been discussed. The sensor is calibrated for normal force which is in addition to the dynamic signal that it provides from the same contact location. The sensor has a simple design and is of a small size allowing it to be incorporated into robotic fingers, and it provides output signals which are largely unaffected by external disturbances
Photoelasticity based dynamic tactile sensor
No full textThe paper presents design, construction and testing of a photoelasticity based dynamic sensor which is capable of detecting slip as well as providing normal force information. Starting with investigations into mechanism of slip, an approximate model of the sensor has been developed. This model explains the design improvements necessary to provide continuous signal during slip. The theoretical model also helps identify various sensor parameters to characterize the sensor. The developed sensor has been compared with other existing sensors and the experimental results from the sensor have been discussed for the type of signal the sensor provides. The sensor is also calibrated for normal force. The sensor is novel in the sense that it offers dynamic slip signal as well as the normal force information from a single contact location, it provides continuous signal during slip, and it has small size which can be easily incorporated into robotic fingers. The sensor has an edge over other existing sensors that its design is simple yet it provides strong signals which are largely unaffected by external disturbances. Copyright © 2005 by ASME
A finger mechanism for adaptive end effectors
No full textThis paper presents design and analysis of a rigid link finger, which may be suitable for a number of adaptive end effectors. The design has evolved from an industrial need for a tele-operated system to be used in nuclear environments. The end effector is designed to assist repair work in nuclear reactors during retrieval operation, particularly for the purpose of grasping objects of various shape, size and mass. The work is based on the University of Southampton's Whole Arm Manipulator, which has a special design consideration for safety and flexibility. The paper discusses kinematic issues associated with the finger design, and to the end of the paper specifies the limits of finger operating parameters for implementing control law
Impact of pregnancy, diet, age and gender on the morphology and function of the pancreatic islets
No full textPolychlorinated biphenyls in pulp and paper mills. Part 2, Distribution and removal. Project 3295, report two : a progress report to members of the Institute of Paper Chemistry
No full text"July 22, 1977.""The Institute of Paper Chemistry, George A. Dubey, Hardev S. Dugal
TCCON data from Four Corners (US), Release GGG2014.R0
No full textThe Total Carbon Column Observing Network (TCCON) is a network of ground-based Fourier Transform Spectrometers that record direct solar absorption spectra of the atmosphere in the near-infrared. From these spectra, accurate and precise column-averaged abundances of atmospheric constituents including CO2, CH4, N2O, HF, CO, H2O, and HDO, are retrieved. This data set contains observations from the TCCON station at Four Corners, U.S.A...Contact person: Manvendra Dubey [email protected]
Role of three phonon scattering in the lattice thermal conductivity of an insulator : application to GaAs
No full textAl-Edani M. C., Dubey K. S. Role of three phonon scattering in the lattice thermal conductivity of an insulator : application to GaAs. In: Bulletin de la Classe des sciences, tome 65, 1979. pp. 555-562
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