AbstractsThe Development and Performance of an Electrostatic Generator Operating Under High Air Pressure. By HerbR. G., ParkinsonD. B., and KerstD. W., University of Wisconsin, Madison, Wisconsin.Physical Review, Vol. li, p. 75, January 15, 1937.

Abstract Over the course of the 2014/15 and 2015/16 austral summer seasons, the South Pole Ice Core project recovered a 1751 m deep ice core at the South Pole. This core provided a high-resolution record of paleoclimate conditions in East Antarctica during the Holocene and late Pleistocene. The drilling and core processing were completed using the new US Intermediate Depth Drill system, which was designed and built by the US Ice Drilling Program at the University of Wisconsin–Madison. In this paper, we present and discuss the setup, operation, and performance of the drill system.

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Maximum Voltage of Wisconsin Electrostatic Generator as a Function of Air Pressure

Physical Review ◽

10.1103/physrev.52.379 ◽

1937 ◽

Vol 52 (4) ◽

pp. 379-379 ◽

Cited By ~ 2

Author(s):

R. G. Herb ◽

E. J. Bernet

Keyword(s):

Air Pressure ◽

Electrostatic Generator ◽

Maximum Voltage

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Characterization and Performance of Minimum Quantity Lubricants in Through-Tool Drilling

International Journal of Engineering Materials and Manufacture ◽

10.26776/ijemm.05.04.2020.01 ◽

2020 ◽

Vol 5 (4) ◽

pp. 98-115

Author(s):

Amla Patil ◽

Jay Raval ◽

Tim Bangma ◽

Immanuel Edinbarough ◽

Bruce Tai ◽

...

Keyword(s):

High Speed ◽

Minimum Quantity Lubrication ◽

Air Pressure ◽

Cluster Method ◽

High Concentration ◽

High Speed Imaging ◽

Minimum Quantity ◽

Drilling Performance ◽

Highly Sensitive ◽

And Performance

This study characterized airborne microdroplet diameters and size distribution from two commercially available lubricants A and B for internal minimum quantity lubrication (MQL). The effects of air pressure, oil channel size, physical properties of lubricants on the resultant microdroplets and through-tool MQL drilling performance were studied. Airborne microdroplet diameters were highly sensitive to the coolant channel sizes and air pressure. Cluster method was used to divide microdroplets into smaller clusters for comparison. Experimental data show that the average airborne microdroplet of lubricant B was larger than that of lubricant A at different air pressures and channel sizes. The contact angle of lubricant A was at least 10° less than that of lubricant B when depositing on glass or aluminium. High-speed imaging showed the tendency of more viscous lubricant B sticking to the drill tip, and higher pressure and longer time was required to atomize this viscous oil. Built-up-edges were less significant when drilling A380 aluminium with lubricant A. Due to high machinability of A380 aluminium, variation of hole diameter and hole cylindricity were minimal when drilling with different lubricants. Insignificant improvement in hole quality was observed when drilling with excessive amount of MQL lubricants or high concentration of lubricant C in flood coolant.

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Microorganismos Fijadores De Nitrógeno Y Su Acción Complementaria A La Fertilización Química En El Cultivos De Coffea arabica L.

European Scientific Journal ESJ ◽

10.19044/esj.2017.v13n3p211 ◽

2017 ◽

Vol 13 (3) ◽

pp. 211

Author(s):

Danilo Santana-Aragone ◽

Eduardo Colina-Navarrete ◽

Carlos Castro-Arteaga ◽

Dalton Cadena-Piedrahita ◽

Arianna Sotomayor-Morán ◽

...

Keyword(s):

Coffea Arabica ◽

Plant Weight ◽

Tukey Test ◽

P 75 ◽

Stalk Diameter ◽

Chemical Fertilization ◽

And Performance ◽

Coffee Cultivation ◽

Coffea Arabica L ◽

Number Of Branches

The objective of this work was to evaluate the effect of nitrogen's fixers complementaries to the chemical fertilization in the coffe groing. Ten treatments were used and three repetitions in plots of twenty-five plants, which were distributed in a complete blocks design at random. For the evaluation of averages were used the Tukey test at 95% confidence. During the cycle of the crop was evaluated: plant height, stalk diameter per plant, number of branches per plant, number of grains per plant, weight of 100 grains, yield per hectare of gold coffee and an economic analysis of the treatments. As a result of the experiment, it was noticed that the biofertilizers impacted on the development and performance of coffee cultivation, there was also an increase performance with higher values to the witness. The highest performance was submitted with the application of Micro-Asp (Azospirillium brsilense) in a dose of 6 l/ha in combination with a program of fertilization (160 kg N, 60 kg P, 75 kg K, 30 kg S, 20 kg Mg, 0.4 kg B, 0.2 kg Zn) based on the analysis of soil, achieving 1118.75 kg/ha of gold coffee, the same that is 4.29 times greater than the witness (260,7 kg/ha of gold coffee).

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Study on the Structure and Performance of an Antagonistic Pneumatic Bidirectional Rotary Joint

Mathematical Problems in Engineering ◽

10.1155/2021/8584798 ◽

2021 ◽

Vol 2021 ◽

pp. 1-13

Author(s):

Hongbo Liu ◽

Guodong Sun ◽

Dexu Geng ◽

Junye Li

Keyword(s):

Rotation Angle ◽

Experimental System ◽

Air Pressure ◽

Service Robots ◽

Damping Characteristics ◽

Gel Casting ◽

Maximum Angle ◽

Braking Torque ◽

And Performance ◽

Time Required

An antagonistic pneumatic bidirectional rotary flexible joint was developed to improve both safety and environmental adaptability of service robots and associated human interactions. The joint comprises two semicircular rotary actuators with positive and negative symmetrical distributions and a pneumatic brake. As such, it achieves forward and reverse rotations, and its damping and braking are adjustable in real time, enabling it to maintain its position. According to the force/torque balance at the free end of the rotary actuator, the rotation angle static model was established. The relationship between the actuator rotation angle, driving torque, impedance torque, and air pressure was obtained experimentally. The brake airbag was manufactured using additive manufacturing and silicone gel casting technologies. The mathematical model of the braking torque was established next, and the model was verified through experiments. Furthermore, an experimental system was constructed to carry out the air pressure-angle, air pressure-torque, and speed response experiments without the load on the joint. The results have shown that the joint can achieve any position within ± 68.5° when the driving air pressure varies from 0 to 0.30 MPa; the time required to reach the maximum angle was 0.85 s. The joint has shown good adjustable damping characteristics. Lastly, the braking torque reached 4.21 Nm at 0.32 MPa, effectively maintaining the position.

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The Design, Operation, and Performance of the Round Hill Electrostatic Generator

Physical Review ◽

10.1103/physrev.49.761 ◽

1936 ◽

Vol 49 (10) ◽

pp. 761-776 ◽

Cited By ~ 43

Author(s):

L. C. van Atta ◽

D. L. Northrup ◽

C. M. van Atta ◽

R. J. van de Graaff

Keyword(s):

Electrostatic Generator ◽

And Performance

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All about Eve: Apple Island and the Fictions of Lesbian Community

New Theatre Quarterly ◽

10.1017/s0266464x00000063 ◽

1994 ◽

Vol 10 (37) ◽

pp. 28-32

Author(s):

Stacy Wolf

Keyword(s):

Cultural Production ◽

Performance Space ◽

University Of Wisconsin ◽

Doctoral Candidate ◽

Theory And Criticism ◽

Lesbian Community ◽

Theatre Studies ◽

And Performance ◽

The University ◽

Cultural Feminism

We continue our occasional series on the actuality and the ideology of lesbian performance with a study of Apple Island, a performance space in Madison, Wisconsin. Many of the productions of this ‘women's cultural and art space’ could, suggests Stacy Wolf, be categorized as performance art: she looks at these in the context of other modes and definitions of cultural production, and at the ‘complex interplay of identity and knowledge’ which constructs Apple Island's potential spectators. Looking at both positive negative critiques of its work, she concludes that the activity through which its refusal of political and performative divisions is best exemplified is the weekly class-cumperformance of country western line dancing, and suggests through folkloric analogy how this helps to define or redefine the meaning of cultural feminism. Stacy Wolf is a doctoral candidate in Theatre and Drama and a lecturer in Women's Studies at the University of Wisconsin, Madison. She has also published articles in Theatre Studies, Women and Performance, and the Journal of Dramatic Theory and Criticism.

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