177,421 research outputs found
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
El sentido trágico de La casa grande de Álvaro Cepeda Samudio
No full textEste trabajo es un estudio comparativo entre La casa grande de Álvaro Cepeda Samudio y Orestíada de Esquilo, el cual procede de un interés por explorar las posibles relaciones entre tales tragedias y novela, desde un análisis de estos géneros literarios y pasando por la indagación respecto del carácter mítico de ambas obras y de los personajes arquetípicos representados tanto en la novela de Cepeda Samudio como en la trilogía de Esquilo.Magíster en Estudios LiterariosMaestrí
Intern experience at CH���M Hill, Inc.: an internship report
No full textIncludes author's vita"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical referencesA review of the author's internship experience with CH���M HILL, Inc.
during the period September 1975 through May 1976 is presented. During this nine month
internship the author worked as an Engineer II in the Industrial Processes discipline of this
large consulting engineering firm... The author's prime responsibility was as one of three
lead design engineers on the design of a large wastewater treatment facility for a pulp mill
in Hoquiam, Washington owned by ITT Rayonier Inc. The work generally consisted of the design
of individual treatment units and associated piping and pumping. The purpose of the project
was to provide wastewater treatment capabilities that would satisfy the effluent limitations
(standards) imposed upon the mill by the State of Washington Department of Ecology and the
U.S. Environmental Protection Agency. The author's assignment also entailed necessary
interaction with the project manager and other CH���M HILL design engineers and support staff
members, the client's representatives, and representatives of two other consulting engineering
firms working on the project. Thus, the internship position at CH���M HILL provided considerable
experience coordinating the author's work with the work of other engineers, guiding the design
and administrative efforts of a support staff, and interacting regularly with the client and
other consulting firms. This broad exposure to a variety of engineering and organizational
problems provided a valuable educational experience
Intern experience at the Texas Transportation Institute: an internship report
No full text"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirements for the degree of Doctor of Engineering."Includes vita (leaf 91)Includes bibliographical references (leaf 57)This report discusses the author's engineering experience at the Texas
Transportation Institute (TTI), Texas A&M University from March 1974 through July 1977. A
report of this experience plus twelve additional hours of academic course work were
substituted for an internship according to requirements established by the College of
Engineering. Although the author could not retroactively establish objectives of the type
associated with a typical internship, the work experience gained could be related to the two
general objectives of an intership: 1. To demonstrate an identifiable contribution to the
organization in which the intern served, and 2. To enable the intern to become aware of the
non-technical aspects of working as an engineer in a non-academic environment. While a member
of the Texas Transportation Institute staff, the author worked on a number of projects in the
areas of highway traffic engineering research and the preparation of continuing education
courses for transportation engineering officials. These assignments were contained within the
Urban Transportation Systems Division of TTI. This report delineates the author's contribution
to four particular projects and discusses the technical as well as non-technical experience
gained from each. Having been exposed to more engineering situations than many of the other
Doctor of Engineering students, the author has already formulated some rather specific
milestones for the future. The Doctor of Engineering program is discussed in conjunction with
its potential for helping the author attain these career goals and objectives. Also, some
thoughts are presented regarding the Doctor of Engineering as a viable alternative to the
Ph.D. in preparing for a career in engineering higher education
The long-wavelength view of GG Tau A: rocks in the ring world
No full textWe present the first detection of GG Tau A at centimetre wavelengths, made with the Arcminute Microkelvin Imager Large Array at a frequency of 16 GHz (λ = 1.8 cm). The source is detected at >6 σrms with an integrated flux density of S16GHz = 249 ± 45 µJy. We use these new centimetre-wave data, in conjunction with additional measurements compiled from the literature, to investigate the long-wavelength tail of the dust emission from this unusual protoplanetary system. We use an MCMC-based method to determine maximum likelihood parameters for a simple parametric spectral model and consider the opacity and mass of the dust contributing to the microwave emission. We derive a dust mass of Md ~ 0.1 Msun, constrain the dimensions of the emitting region and find that the opacity index at λ > 7 mm is less than unity, implying a contribution to the dust population from grains exceeding ~4 cm in size. We suggest that this indicates coagulation within the GG Tau A system has proceeded to the point where dust grains have grown to the size of small rocks with dimensions of a few centimetres. Considering the relatively young age of the GG Tau association in combination with the low derived disc mass, we suggest that this system may provide a useful test case for rapid core accretion planet formation models
Sobralia rinconiana Serracin, Samudio & Bogarin 2022, sp. nov.
No full textSobralia rinconiana Serracín, Samudio & Bogarín, sp. nov. (Figures 2 –3) Type:— PANAMA. Chiriquí-Bocas del Toro: Bosque Protector Palo Seco, 8°47’30.4”N 82°12’29.8”W, 1141 m, bosque pluvial premontano, terrestres en bosque secundario a orillas del camino, 3 agosto 2014, Z . Serracín, R. Rincón & D. Bogarín 831 (holotype: UCH!, isotype: PMA!). Among the Sobralia species, S. rinconiana is characterized by the combination of a large plant size that reaches up to 120 cm high with the chartaceous, larger, and wider leaves (27–35 × 14–16 cm), elliptical-lanceolate, acute to acuminate. Among the species of the genus, S. rinconiana is most similar to S. carazoi but differs (apart from its larger size of plants and leaves), in its grayish, papyraceous sheaths (rather than warty and dark) erect conical, acicular, papyraceous flower bracts without spots (instead of erect, narrow, acute, strongly lepidote), the spreading flowers with reflexed petals and the infundibuliform, cream-yellow lip (vs. campanulate, white flowers with an opened lip of S. carazoi) in its grayish, papyraceous sheaths, erect conical, acicular, papyraceous flower bracts without spots, the longer and wider sepals 4.0–4.4 × 0.8–1.0 cm (vs. 2.0 × 0.8 cm) and petals 4.2 × 0.9 cm (vs. 1.70 × 0.45 cm), the cream-yellow lip 3.8 × 2.8 cm (vs. white, 1.3 × 1.6 cm), and the longer, suberect column 2.5 cm long (vs. 1.2 cm). Description:—Erect, terrestrial, large herb 120 cm tall. Roots coarse, fleshy, finely pubescent, 3–5 mm in diameter, and 5-10 cm long. Stem cylindric, round in section, simple, fleshy, erect; up to 85 cm long, 4–5 mm in diameter; bracts, tubular papyraceous, not lepidote, foliate in the upper third, covered by adpressed, green, sparsely subscarious sheaths, becoming papyraceous with age. Leaves plicate, sessile, on a clasping vaginate base, chartaceous, ellipticlanceolate, acute, 3–5 per stem, 27–35 × 14–16 cm, with 9 –11 veins; the uppermost leaf smaller, petiolate, subtending the inflorescence, 7.5–9.0 × 4–5 cm. Inflorescence terminal, developed from a conical cluster of imbricating bracts, successively several-flowered, with a single flower, opened at once, floral bracts acuminate, papyraceous, 1.5–2.0 cm. Floral bracts conical, 2 cm long, acicular, papyraceous. Flowers ephemeral, white, with a cream-yellow lip throat, the lip base reddish tinged, the apex white, membranaceous, to 8.2 cm in diameter. Dorsal sepal elliptic-lanceolate, suberect, conduplicate, dorsally unicarinate, mucronate, entire, 4.0–4.4 × 0.8–1.0 cm. Lateral sepals elliptic to oblong, spreading, conduplicate, dorsally unicarinate, mucronate, entire, 4.0–4.2 × 0.8–0.9 cm. Petals white, ellipticlanceolate, reflexed, spreading, acute, 4.2 × 0.9 cm. Lip infundibuliform, obscurely 3-lobed, oblong, retuse, erect, the base encircling the column, the distal margins spreading, crispate, 3.8 × 2.8 cm, the base of the lamina with two divergent calli. Column hemiterete-subclavate, slightly arched, 2.5 × 0.4 cm, the apex with two acute arms, with two prominent keels at the middle. Anther and stigma ventral. Anther cap cucullate, translucent, rounded, 2-celled, 2 mm in diameter. Pollinia 4, soft, mealy, in two symmetrical pairs of different size, not sharply distinct from the caudicles, each hemipollinarium 1 × 2 mm. Distribution and Ecology:—Only known from Bosque Protector de Palo Seco, Fortuna along the Cordillera de Talamanca in western Panama. It grows as terrestrial on the roadside secondary forest at 1141 m of elevation (Figure 4). Plants were recorded in flower in August. Etymology:—Dedicated to Prof. Rafael Rincón, Director of the Herbarium UCH of Universidad Autónoma de Chiriquí (UNACHI), Panama, in recognition of his contributions to the flora of Panama and who encouraged us to study this Sobralia. Conservation status:— It has not been formally assessed, however, it should be considered data deficient (DD) because more data on population and distribution is needed for a proper assessment. Taxonomic Discussion:—the most conspicuous characteristic of S. rinconiana is the plant size that reaches up to 120 cm high and its large elliptical-lanceolate, chartaceous, acute to acuminate leaves 30–35 × 14–16 cm. Sobralia rinconiana is similar to S. carazoi C.H.Lankester & Ames (1924: 34) but vegetatively differs (apart from its larger size of plants and leaves) in its grayish, papyraceous sheaths (rather than warty and dark) erect conical, acicular, papyraceous flower bracts without spots (instead of erect, narrow, acute, strongly lepidote), the longer and wider sepals 4.0–4.4 × 0.8–1.0 cm (vs. 2.0 × 0.8 cm) and petals 4.2 × 0.9 cm (vs. 1.70 × 0.45 cm), the cream-yellow lip 3.8 × 2.8 cm (vs. white, 1.3 × 1.6 cm), and the longer, suberect column 2.5 cm long (vs. 1.2 cm). The habit of S. rinconiana is similar to other species such as S. chrysostoma Dressler, S. leucoxantha Reichenbach.f. (1866: 86), S. undatocarinata C.Schweinfurth (1938: 197), S. violacea Linden ex Lindley (1846: 133), and S. warszewiczii Reichenbach (1852: 714) characterized by stems over 100 cm tall, with conspicuous floral bracts forming an imbricating cone; however, the leaf of the new species is larger than the rest of the Sobralia currently registered in Panama. The leaf size of the species similar in plant habit to S. rinconiana is up to 23 cm long and 8 cm wide, contrasting with the leaf of S. rinconiana, which is greater than 30 long and 14 cm wide. Two peculiar characteristics of S. rinconiana are the small flower size in proportion to the plant height and leaf width. These two morphological features are present at least in S. carazoi, S. doremiliae Dressler (1995: 142), and S. valida Rolfe (1909: 65). However, the new species shows spreading flowers with reflexed petals from the middle to the apex. In addition, the infundibuliform, cream-yellow lip contrasts to the campanulate, white flowers with an opened lip of S. carazoi and S. doremiliae. Another similar species, Sobralia valida, shows smaller and narrower leaves (12–20 × 6.0– 8.5 cm) and the lip with crested veins and a yellow band becoming deep orange in front (Rolfe 1909). These characters contrast to the two basal keels not extending along the cream-yellow lip of S. rinconiana.Published as part of Serracín, Zuleika, Samudio, Zabdy & Bogarín, Diego, 2022, A new Sobralia (Orchidaceae: Sobralieae) from Panama, pp. 81-87 in Phytotaxa 559 (1) on pages 83-86, DOI: 10.11646/phytotaxa.559.1.9, http://zenodo.org/record/700944
Intern experience at Honeywell, Inc., Large Information Systems Division: an internship report
No full textIncludes author's vita"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical references (leaves 169-173)This report describes the author's internship assignment at Honeywell
Inc. - Large Information Systems Division from January, 1982 through August, 1982. The purpose
of the assignment was to fulfill the internship requirements of the Doctor of Engineering
Program. During the internship, the author held the position of VLSI design engineer, where he
worked on a predefined project. The project's objective was to evaluate how circuit designs
based on an advanced CMOS process, can be applied to hardware products at LISD. The internship
allowed the author to successfully apply the MOS circuit design training, which ws developed
at Texas A&M, to an industrial project. In addition, involvement in different activities
and exposure to the various problems not encountered in academia, made this internship an
invaluable experience
\u27Letters Full of Love\u27: Wayne Booth\u27s Theories of the Implied Author and Reader in Brad Marsh\u27s WWII Correspondence
No full textThis project consists of a qualitative study of the WWII correspondence of Captain Brad Marsh from the collection of letters donated by his daughter on April 26, 2013. I draw from the narrative theory and works of Wayne Booth to examine Marsh’s construction of self as an implied author by examining how he presents his experiences and portrays his emotions. I also examine how Marsh constructs his implied self by paying attention to details such as the information he shares with Lynn and how he presents it. I explore the nature of the implied author and reader in the correspondence and also how the relationship between the implied writer and reader influences the understanding of an unintended audience
Intern Experience at MEL, Inc.: An Internship Report
No full textIncludes author's vita"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical references (leaves 82-85)...The author spent a one-year internship at MEL, Inc., a civil and
mechanical engineering consulting firm located in Baton Rouge, Louisiana. By special
arrangement with the president of the firm, the author was able to participate in roles at
various levels within the firm. These activities included engineering design, supervision and
management, project cost control, and interface with top level management. During this period,
the author has been engaged in the following assignments: 1. Serving as senior project
engineer on the Louisiana Training Institution air conditioning and heating project, 2.
Serving at the review and advisory level for three projects, 3. Studying and implementing
computer aided design and drafting system for MEL, Inc. 4. Developing a projet cost control
system that is interactive with the firm's payroll program. 5. Upgrading the firm's computer
capacity. 6. Performing special assignments from the President, Executive Vice-President,
Manager of Operation and Manager of Business and Fiscal Affairs at MEL, Inc. These activities
involved the application of scientific principles to the design, installation, and improvement
of integrated systems of people, materials, and equipment to provide the most effective
operating and work procedures. As a result of this involvement in a wide range of assignments,
the author now has a broadly based experience in a consulting engineering firm as both
engineer and manager. The author also found that well-developed, practical courses in
communication, business, engineering, law, and management from the Doctor of Engineering
program at Texas A&M University contributed greatly to this successful internship with
MEL, Incorporated
Intern experience at International Business Machines Corporation, STD/Austin: an internship report
No full textIncludes author's vita"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical references (leaf 72)This report highlights the author's major activities and
accomplishments during his 15 months internship at the International Business Machines (IBM)
Corporation in Austin, Texas. The internship objectives were set so as to provide him with an
experience commensurate with the requirements of the Doctor of Engineering Program at Texas
A&M University. During his internship, the author was involved with a variety of technical
and non-technical projects. His assignments included: 1) The design of an automation strategy
for one manufacturing center. 2) The overall supervision and coordination of a major
automation project. 3) The development of a project scheduling/tracking system. 4)
Co-authoring an "Equipment Specifications Guidelines" form. 5) Other assignments as needed.
The nature and scope of the above assignments provided the author with a broadly based
experience in the Manufacturing Engineering field. Additionally, the leadership role he played
in some of the assignments afforded him with first hand exposure to many aspects of management
and leadership skills. All in all, the author believes that this internship proved to be an
enriching experience and a valuable addition to his overall
education
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