scholarly journals Booster Compressors for the Citrus Industry: Reciprocating, Rotary and Centrifugal

1957 ◽  
Author(s):  
L. R. St. Onge
Keyword(s):  
Citrus Industry ◽  
Booster Compressor ◽  
The Subject

To a citrus engineering group, refrigeration is a common-place item. However, except to those directly concerned with the subject, immediate reference to specific terms might be somewhat confusing. Since our subject is “Booster Compressors For The Citrus Industry”, it might be well to define a booster compressor. Paper published with permission.

Packaging for the Citrus Industry

1962 ◽  
Author(s):  
A. H. Lucas
Keyword(s):  
Annual Meeting ◽  
Citrus Industry ◽  
Group I ◽  
The Subject

When I was approached by Tom Kimball to make this talk to your group I was very much pleased. First, because I considered it a compliment to appear before you at this annual meeting, and secondly, because the subject of Packaging has earned a spot on this program. Paper published with permission.

Uses of Statistics in Citrus Operations

1969 ◽  
Author(s):  
William J. Hepburn
Keyword(s):  
Process Control ◽  
Control Charts ◽  
Statistical Tests ◽  
Statistical Techniques ◽  
Statistical Control ◽  
Citrus Industry ◽  
Computer Approach ◽  
Mathematical Problems ◽  
The Subject

The subject of “Statistics for Process Control” is rather broad, therefore, I am limiting my paper to three basic topics: first, the interpretation of patterns of variation using statistical control charts, second, quick and easy statistical tests, and third, a computer approach to solving complicated mathematical problems. My purpose is to present statistical techniques that an engineer or analyst can use with a minimum of difficulty. For me, these methods have proven valuable in the analysis of a variety of problems in the Citrus Industry. Paper published with permission.

Automation for the Citrus Industry

1958 ◽  
Author(s):  
Jack Barker
Keyword(s):  
Citrus Industry ◽  
Present Purpose ◽  
The Subject

With the ever-increasing necessity of economy of processing and uniformity of product, automation becomes more and more vital to the citrus industry. Our present purpose is to define the subject, briefly describe its functions, and discuss, as time will allow, its pertinent applications. Paper published with permission.

Pumps in Industry: Theory and Application

1998 ◽  
Author(s):  
Walter Weaver ◽  
Eric Bradner
Keyword(s):  
Citrus Industry ◽  
Starting Point ◽  
The Subject

A basic review of hydraulics will serve us well as a starting point for discussing the unique applications of the Citrus industry. To begin this review, certain pertinent terms will be defined to help build a foundation of understanding. This review is not meant to be taken as a complete dissertation on the subject but to be held as a useful reference. The majority of the following information has been paraphrased from Worthington Pump’s technical symposium. Paper published with permission.

Modern Fresh Fruit Handling, Adams Packing Association, Inc.

1963 ◽  
Author(s):  
W. Grierson
Keyword(s):  
Cost Reduction ◽  
Fresh Fruit ◽  
Citrus Industry ◽  
The Subject ◽  
Handling Methods

Things are not always what they seem to be. The assigned title of this paper would seem to limit the subject to the new Adams packinghouse. Nevertheless, it is necessary to first consider the harvesting methods selected. The main reason for improving packing methods is to reduce costs, and in the fresh fruit business today opportunities for cost reduction are principally between the tree and the packinghouse. Moreover the packer has some reasonable control over his choice of field handling methods, but inside the packinghouse his choice of methods is severely limited by the policies of buyers and the lack of any combined policy on container standardization by the fresh fruit industry in general. This is particularly true in Florida as contrasted, for example, with the California citrus industry. Paper published with permission.

scholarly journals Validation of the Booster Bleed Valve Control Logic in the New BR715 Jet Engine

1999 ◽  
Author(s):  
Dieter Peitsch ◽  
Roland Fiola ◽  
Rene Brodmuehler ◽  
Annette Nielsen
Keyword(s):  
Steady State ◽  
Low Power ◽  
Development Process ◽  
Transient Operation ◽  
Control Logic ◽  
Jet Engine ◽  
Operational Conditions ◽  
Booster Compressor ◽  
The Subject ◽  
Valve Control

The subject of this paper is the validation of the newly developed booster bleed valve control logic, which has been implemented into the new BR715 turbo fan jet engine. The booster compressor is protected from surges in the low power regime as well as during transient operation by opening a booster bleed valve. This bleed valve is situated just after the booster compressor and passes bleed air into the bypass duct, hence unloading the booster compressor in critical operational conditions. The BR715 jet engine takes advantage of a newly developed logic driving this valve. Monitoring input parameters such as spool and flight speeds as well as altitude, the combined steady state and transient logic provides the capability of appropriately positioning the valve. This ensures maintaining an optimum performance of the engine throughout the whole operating range. Furthermore the logic allows for reaction on special requirements such as surge events. During testing for certification of this engine, extensive handling tests have been performed. The performance of the logic was investigated in detail and the results are documented within this paper. They prove the logic to be working very successfully. The booster compressor is totally protected from surge in the low power regime during steady state conditions. For transient operation, especially during rapid decelerations as well as during bodie manoeuvres of the engine, the core logic for the transient modulation showed extremely effective behaviour. The various schedules inside the logic were partially varied for testing. This paper comprises this development process and each table’s contribution to the booster compressor’s behaviour is explained in detail.

Words

PMLA ◽  
1935 ◽  
Vol 50 (4) ◽  
pp. 1320-1327
Author(s):  
Colbert Searles
Keyword(s):  
Subject Matter ◽  
Assistant Professor ◽  
The Subject

THE germ of that which follows came into being many years ago in the days of my youth as a university instructor and assistant professor. It was generated by the then quite outspoken attitude of colleagues in the “exact sciences”; the sciences of which the subject-matter can be exactly weighed and measured and the force of its movements mathematically demonstrated. They assured us that the study of languages and literature had little or nothing scientific about it because: “It had no domain of concrete fact in which to work.” Ergo, the scientific spirit was theirs by a stroke of “efficacious grace” as it were. Ours was at best only a kind of “sufficient grace,” pleasant and even necessary to have, but which could, by no means ensure a reception among the elected.

Artificial satellite orbit computations

1966 ◽  
Vol 25 ◽  
pp. 363-371
Author(s):  
P. Sconzo
Keyword(s):  
Artificial Satellite ◽  
Satellite Orbit ◽  
Artificial Satellites ◽  
Orbital Elements ◽  
Differential Correction ◽  
Gravitational Effects ◽  
Short Intervals ◽  
The Subject ◽  
Introductory Discussion ◽  
Orbit Computation

In this paper an orbit computation program for artificial satellites is presented. This program is operational and it has already been used to compute the orbits of several satellites.After an introductory discussion on the subject of artificial satellite orbit computations, the features of this program are thoroughly explained. In order to achieve the representation of the orbital elements over short intervals of time a drag-free perturbation theory coupled with a differential correction procedure is used, while the long range behavior is obtained empirically. The empirical treatment of the non-gravitational effects upon the satellite motion seems to be very satisfactory. Numerical analysis procedures supporting this treatment and experience gained in using our program are also objects of discussion.

C. Wire Cabling for Telescope Systems

1966 ◽  
Vol 27 ◽  
pp. 159-161
Keyword(s):  
The Subject ◽  
Data Multiplexing

Rule: I'd like at this point to bring up the subject of cables and wireways around the telescope. We've touched upon this twice during previous sessions: the cable wrap up problem, the communications problem, and data multiplexing problem. I think we'll ask Bill Baustian if he will give us a brief run down on what the electrical run problems are, besides doubling the system every year.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

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