Another “Smallest” Electric Motor, Largest Roller Bearings in the World, and more

1928 ◽  
Vol 138 (6) ◽  
pp. 563-569
Keyword(s):  
Electric Motor ◽  
Roller Bearings ◽  
The World

Design of an Electromagnetic Actuator Suitable for Production by Rapid Prototyping

2011 ◽  
Author(s):  
Matthew S. Moses ◽  
Gregory S. Chirikjian
Keyword(s):  
Rapid Prototyping ◽  
Permanent Magnet ◽  
Electric Motor ◽  
Electromagnetic Actuator ◽  
3D Printer ◽  
Permanent Magnet Motor ◽  
Roller Bearings ◽  
System A ◽  
Factors Influencing ◽  
Coil Geometry

This paper presents a design for an electric motor that can potentially be produced by a personal 3D printer. The concept of a Cyclic Fabrication System — a network of tools, machines, and processes capable of producing all of its constituent components — is discussed in order to provide context for the various factors influencing the design. The motor is an axial-airgap permanent-magnet motor with a flat 2-layer coil. The coil pattern makes minimal use of crossovers or vias, and is well-suited to several methods for fabricating conductive structures that are currently under development. A versatile MATLAB script is presented which is used to generate the coil pattern. Coil geometry is controlled parametrically, and it is straightforward to generate a wide variety of coils, corresponding to different arrangements of magnets and desired coil spacings. The motor uses plastic roller bearings that are easily fabricated.

scholarly journals Design, Fabrication and Performance Evaluation of Chicken De-Feathering Machine

2021 ◽  
Vol 8 (12) ◽  
pp. 703-711
Author(s):  
Adefuye O.A ◽  
Adedeji K.A ◽  
Fadipe L.O
Keyword(s):  
Performance Evaluation ◽  
Electric Motor ◽  
Hot Water ◽  
Calorie Content ◽  
The World ◽  
Different Types ◽  
And Performance ◽  
Design Calculations ◽  
The Right ◽  
Rotating Plate

Due to its low fat and calorie content, chicken meat is popular among non-vegetarians all over the world. The design, fabrication, and performance evaluation of a chicken de-feathering machine using locally available materials are described in this paper. The design calculations were done correctly to guarantee the right shaft diameter, as this might impact the machine's efficiency. The machine uses rubber fingers to do the actual removal of the feathers. The rubber fingers are attached to a rotating plate against a stationary plucking basin carrying protruding rubber fingers. From the analysis, a 1.0 H.P electric motor is required to drive the machine and this was used to drive the machine. Following the design and fabrication of the machine, three different types of chickens were used to test its performance. The chickens were immersed in hot water between 60 and 90 degrees Celsius and held between the 40s and 60s. The machine removed feathers without any major damage to the chickens. At each trial, the efficiency was calculated. In conclusion, the machine performed efficiently and effectively, leaving behind products that are readily marketable. Keywords: [Chicken, De-feathering, Efficiency. Fingers, Scalding, Rubber.]

Solar Vehicles: The Challenge of Maximum Speed From Minimal Power

2002 ◽  
Author(s):  
Simon Watkins ◽  
Clive Humphris
Keyword(s):  
Electric Motor ◽  
Aerodynamic Drag ◽  
Design Principles ◽  
Maximum Speed ◽  
The Sun ◽  
Highly Efficient ◽  
The World ◽  
Current Record

The World Solar Challenge is a race from Darwin to Adelaide which attracts purpose-built vehicles from around the world. Using only power from the sun, the vehicles reach speeds of over 100 km/hr and the current record holder averaged a speed of over 90 km/hr. In this paper the background to the race and some of the technology used is described. Since aerodynamic drag is the major resistance to motion, this is examined in detail, including the testing and design principles applied to the Australian “Aurora” vehicle which won the race in 1999 and came second in 2001. A highly efficient electric motor, developed specifically for the Aurora is also described.

scholarly journals Algorithm of Strength Calculation of Drive Elements of a Roller Conveyor

2021 ◽  
Vol 285 ◽  
pp. 07040
Author(s):  
Mariya Androsenko ◽  
Nail Tyuteryakov ◽  
Ekaterina Kulikova ◽  
Lyubov Deryabina ◽  
Ivan Krayniy
Keyword(s):  
Electric Motor ◽  
Static Strength ◽  
Strength Calculation ◽  
Roller Conveyor ◽  
Roller Bearings ◽  
Torsion Strength ◽  
First Moment ◽  
Conveyor Roller

The paper shows an algorithm for determining the load on the electric motor of run-out conveyor starting from determination of the first moment of no load operation during slab conveying, slipping torque of the rollers along the surface of the conveyed billet and ending with the choice of the electric motor. It also covers an algorithm for strength calculations of the run-out conveyor roller, which includes the calculation of the moments and forces acting on the conveyor roller and its supports, the calculation of static strength and torsion strength, calculation of roller deflection of the conveyor rollers as well as the selection and verification calculation of conveyor roller bearings.

A pragmatist philosophy of psychological science and its implications for replication

2018 ◽  
Vol 41 ◽  
Author(s):  
Ana Gantman ◽  
Robin Gomila ◽  
Joel E. Martinez ◽  
J. Nathan Matias ◽  
Elizabeth Levy Paluck ◽  
...  
Keyword(s):  
William James ◽  
Mental Processes ◽  
Psychological Science ◽  
Behavioral Measurement ◽  
The World ◽  
Pragmatist Philosophy

AbstractA pragmatist philosophy of psychological science offers to the direct replication debate concrete recommendations and novel benefits that are not discussed in Zwaan et al. This philosophy guides our work as field experimentalists interested in behavioral measurement. Furthermore, all psychologists can relate to its ultimate aim set out by William James: to study mental processes that provide explanations for why people behave as they do in the world.

Culture and the plasticity of perception

2020 ◽  
Vol 43 ◽  
Author(s):  
Michael Lifshitz ◽  
T. M. Luhrmann
Keyword(s):  
Cultural Context ◽  
Sensory Experience ◽  
Cultural Learning ◽  
The World

Abstract Culture shapes our basic sensory experience of the world. This is particularly striking in the study of religion and psychosis, where we and others have shown that cultural context determines both the structure and content of hallucination-like events. The cultural shaping of hallucinations may provide a rich case-study for linking cultural learning with emerging prediction-based models of perception.

Let's call a memory a memory, but what kind?

2019 ◽  
Vol 42 ◽  
Author(s):  
Nazim Keven
Keyword(s):  
Episodic Memory ◽  
Animal Cognition ◽  
The World

Abstract Hoerl & McCormack argue that animals cannot represent past situations and subsume animals’ memory-like representations within a model of the world. I suggest calling these memory-like representations as what they are without beating around the bush. I refer to them as event memories and explain how they are different from episodic memory and how they can guide action in animal cognition.

Rotational Characteristics of the Green Solar Corona: 1947-1991

1994 ◽  
Vol 144 ◽  
pp. 139-141 ◽  
Author(s):  
J. Rybák ◽  
V. Rušin ◽  
M. Rybanský
Keyword(s):  
Solar Corona ◽  
World Wide ◽  
Rotation Period ◽  
Original Data ◽  
Coronal Emission ◽  
Time Intervals ◽  
Data Set ◽  
The World ◽  
Coronal Emission Line ◽  
Homogeneous Data

AbstractFe XIV 530.3 nm coronal emission line observations have been used for the estimation of the green solar corona rotation. A homogeneous data set, created from measurements of the world-wide coronagraphic network, has been examined with a help of correlation analysis to reveal the averaged synodic rotation period as a function of latitude and time over the epoch from 1947 to 1991.The values of the synodic rotation period obtained for this epoch for the whole range of latitudes and a latitude band ±30° are 27.52±0.12 days and 26.95±0.21 days, resp. A differential rotation of green solar corona, with local period maxima around ±60° and minimum of the rotation period at the equator, was confirmed. No clear cyclic variation of the rotation has been found for examinated epoch but some monotonic trends for some time intervals are presented.A detailed investigation of the original data and their correlation functions has shown that an existence of sufficiently reliable tracers is not evident for the whole set of examinated data. This should be taken into account in future more precise estimations of the green corona rotation period.

Where in the world is the hip hop nation?

Popular Music ◽  
2003 ◽  
Vol 22 (2) ◽  
pp. 241-245
Author(s):  
Inez H. Templeton
Keyword(s):  
Hip Hop ◽  
The World

Scanning electron microscopy of freeze-fractured prescapular lymph node of caprine

1984 ◽  
Vol 42 ◽  
pp. 244-245
Author(s):  
O. Faroon ◽  
F. Al-Bagdadi ◽  
T. G. Snider ◽  
C. Titkemeyer
Keyword(s):  
Lymph Node ◽  
Lymph Nodes ◽  
Lymphatic System ◽  
Three Dimensional ◽  
Meat Products ◽  
The Body ◽  
Morphological Data ◽  
The World ◽  
Cellular Constituent ◽  
Scanning Electron

The lymphatic system is very important in the immunological activities of the body. Clinicians confirm the diagnosis of infectious diseases by palpating the involved cutaneous lymph node for changes in size, heat, and consistency. Clinical pathologists diagnose systemic diseases through biopsies of superficial lymph nodes. In many parts of the world the goat is considered as an important source of milk and meat products.The lymphatic system has been studied extensively. These studies lack precise information on the natural morphology of the lymph nodes and their vascular and cellular constituent. This is due to using improper technique for such studies. A few studies used the SEM, conducted by cutting the lymph node with a blade. The morphological data collected by this method are artificial and do not reflect the normal three dimensional surface of the examined area of the lymph node. SEM has been used to study the lymph vessels and lymph nodes of different animals. No information on the cutaneous lymph nodes of the goat has ever been collected using the scanning electron microscope.

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